US4631456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inertial energy storage device and synchronous rotary electrical machine for use therein
Assignee: Charles Stark Draper Laboratory Inc
•
Filing: 1984-09-17
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Granted: 1986-12-23
•
Expires: 2004-09-17
Abstract
Abstract An inertial energy storage device including a synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy including: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on the stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; and a rotor having a plurality of circumferentially spaced teeth facing the stator teeth, and a circumferential flywheel mass radially spaced from its rotational axis; and a motor control circuit including sensor means for sensing the position of the rotor relative to the stator; means, responsive to the sensor means, for generating a waveform for driving the machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of the waveform for driving the machine; and a current control circuit for controlling amplitude of the current provided to the machine.
Inventors
- 👤 Robert D. Drescher
- 👤 David B. Eisenhaure
- 👤 Richard L. Hockney
- 👤 Bruce G. Johnson
- 👤 Emery St. George, Jr.
- 👤 David C. Whipple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:14
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/02; H02K7/025; H02K21/00; H02K21/38; H02K21/44; H02K29/00; H02K29/06; Y; Y02; Y02E; Y02E60/00; Y02E60/16; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2117
Claims Analysis
Total Claims: 60
Claim 1
Independent Claim
116 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; and stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole.
Claim 2
Dependent Claim
116 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; and stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole.
Claim 3
Dependent Claim
14 words
The machine of claim 1 in which said rotor is external to said stator.
Claim 4
Dependent Claim
20 words
The machine of claim 1 in which said rotor includes a circumferential flywheel mass radially spaced from its rotational axis.
Claim 5
Dependent Claim
15 words
The machine of claim 1 in which said field excitation means includes a permanent magnet.
Claim 6
Dependent Claim
21 words
The machine of claim 1 in which said field excitation means is disposed on said stator between said sets of teeth.
Claim 7
Dependent Claim
33 words
The machine of claim 1 in which the teeth of one of said sets of teeth on said stator are offset with respect to the teeth on the other set on said stator.
Claim 8
Dependent Claim
23 words
The machine of claim 1 in which said plurality of teeth on said rotor includes two axially spaced sets of circumferentially spaced teeth.
Claim 9
Dependent Claim
33 words
The machine of claim 1 in which the teeth of one of said sets of teeth on said rotor are offset with respect to the teeth on the other set on said rotor.
Claim 10
Dependent Claim
28 words
The machine of claim 1 further including rectifier means for converting an a.c. output of said stator windings to d.c. when said machine is operated as a generator.
Claim 11
Dependent Claim
47 words
The machine of claim 1 further including a motor control circuit including sensor means for sensing the position of said rotor relative to said stator and means, responsive to said sensor means, for generating a waveform for driving said machine when it is operating as a motor.
Claim 12
Dependent Claim
28 words
The machine of claim 10 in which said motor control circuit further includes a voltage control circuit for controlling the amplitude of said waveform for driving said machine.
Claim 13
Dependent Claim
50 words
The machine of claim 11 in which said voltage control circuit includes a frequency detector circuit for comparing the frequency of the output from said sensor means with the maximum frequency of said machine and providing a signal indicative thereof to adjust the amplitude of the input to said machine.
Claim 14
Dependent Claim
28 words
The machine of claim 10 in which said motor control circuit further includes a current control circuit for controlling the amplitude of the current provided to said machine.
Claim 15
Dependent Claim
40 words
The machine of claim 13 in which said current control circuit includes current sensor means for sensing the current flowing in said stator windings and means, responsive to said current sensor means, for adjusting the current supplied to said machine.
Claim 16
Dependent Claim
14 words
The machine of claim 10 in which said sensor means includes an optical sensor.
Claim 17
Dependent Claim
45 words
The machine of claim 10 in which said means for generating a waveform includes a signal generator and a phase detector, responsive to said sensor means and said signal generator, for keeping said signal generator output in phase with the output from said sensor means.
Claim 18
Dependent Claim
15 words
The machine of claim 16 in which said signal generator includes a voltage controlled oscillator.
Claim 19
Dependent Claim
25 words
The machine of claim 16 in which said means for generating a waveform includes a switching circuit driven by the output of said signal generator.
Claim 20
Dependent Claim
76 words
The machine of claim 16 in which said means for generating a waveform includes a starter circuit for initially driving said signal generator; switching means for supplying the input of said signal generator an output from one of said starter circuit and said phase detector; and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 21
Dependent Claim
19 words
The device of claim 1 in which said rotor includes a pair of axial spaced sets of said poles.
Claim 22
Dependent Claim
23 words
The device of claim 20 in which said poles in one set are offset with respect to said poles in the other set.
Claim 23
Dependent Claim
25 words
The device of claim 1 in which said teeth in one of said axially spaced sets are aligned with those in the other said set.
Claim 24
Dependent Claim
212 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor poles and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole; and a motor control circuit including sensor means for sensing the position of said rotor relative to said stator; means, responsive to said sensor means, for generating waveform for driving said machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; said voltage control circuit including a frequency detector circuit for comparing the frequency of the output from said sensor means with a maximum frequency of said machine and providing a signal indicative thereof to adjust the amplitude of the input to the machine.
Claim 25
Dependent Claim
212 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor poles and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole; and a motor control circuit including sensor means for sensing the position of said rotor relative to said stator; means, responsive to said sensor means, for generating waveform for driving said machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; said voltage control circuit including a frequency detector circuit for comparing the frequency of the output from said sensor means with a maximum frequency of said machine and providing a signal indicative thereof to adjust the amplitude of the input to the machine.
Claim 26
Dependent Claim
28 words
The machine of claim 23 in which said motor control circuit further includes a current control circuit for controlling the amplitude of the current provided to said machine.
Claim 27
Dependent Claim
40 words
The machine of claim 24 in which said current control circuit includes current sensor means for sensing the current flowing in said stator windings and means, responsive to said current sensor means, for adjusting the current supplied to said machine.
Claim 28
Dependent Claim
14 words
The machine of claim 23 in which said sensor means includes an optical sensor.
Claim 29
Dependent Claim
45 words
the machine of claim 23 in which said means for generating a waveform includes a signal generator and a phase detector, responsive to said sensor means and said signal generator, for keeping said signal generator output in phase with the output from said sensor means.
Claim 30
Dependent Claim
15 words
The machine of claim 27 in which said signal generator includes a voltage controlled oscillator.
Claim 31
Dependent Claim
25 words
The machine of claim 27 in which said means for generating a waveform includes a switching circuit driven by the output of said signal generator.
Claim 32
Dependent Claim
77 words
The machine of claim 27 in which said means for generating a waveform includes a starter circuit for initially driving said signal generator; switching means for supplying the input of said signal generator an output from one of said starter circuit and said phase detector circuit; and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 33
Dependent Claim
175 words
A motor control circuit for a synchronous rotary electrical machine having a rotor and a stator, comprising: means for sensing the position of the rotor relative to the stator; means, responsive to said sensing means, for generating a waveform for driving said machine as a motor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; and a current control circuit for controlling amplitude of the current provided to said machine; said means for generating a waveform including a signal generator, a phase detector, responsive to said sensing means and said signal generator, for keeping said signal generator output in phase with the output from said sensing means, a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator with output from one of said starter circuit and said phase detector, and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 34
Dependent Claim
175 words
A motor control circuit for a synchronous rotary electrical machine having a rotor and a stator, comprising: means for sensing the position of the rotor relative to the stator; means, responsive to said sensing means, for generating a waveform for driving said machine as a motor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; and a current control circuit for controlling amplitude of the current provided to said machine; said means for generating a waveform including a signal generator, a phase detector, responsive to said sensing means and said signal generator, for keeping said signal generator output in phase with the output from said sensing means, a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator with output from one of said starter circuit and said phase detector, and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 35
Dependent Claim
28 words
The machine of claim 31 in which said motor control circuit further includes a voltage control circuit for controlling the amplitude of said waveform for driving said machine.
Claim 36
Dependent Claim
50 words
The machine of claim 32 in which said voltage control circuit includes a frequency detector circuit for comparing the frequency of the output from said sensing means with the maximum frequency of said machine and providing a signal indicative thereof to adjust the amplitude of the input to said machine.
Claim 37
Dependent Claim
14 words
The machine of claim 31 in which said sensing means includes an optical sensor.
Claim 38
Dependent Claim
15 words
The machine of claim 31 in which said signal generator includes a voltage controlled oscillator.
Claim 39
Dependent Claim
25 words
The machine of claim 31 in which said means for generating a waveform includes a switching circuit driven by the output of said signal generator.
Claim 40
Dependent Claim
40 words
The machine of claim 31 in which said current control circuit includes current sensor means for sensing the current flow in said stator windings and means, responsive to said current sensor means, for adjusting the current supplied to said machine.
Claim 41
Dependent Claim
257 words
An inertial storage device comprising: a synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy, including a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; and a rotor having a plurality of circumferentially spaced teeth facing said stator teeth and a circumferential flywheel mass radially spaced from its rotational axis; and a motor control circuit including sensor means for sensing the position of said rotor relative to said stator; means, responsive to said sensor means, for generating a waveform for driving said machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; and a current control circuit for controlling amplitude of the current provided to said machine; said means for generating a waveform including a signal generator, a phase detector, responsive to said sensor means and said signal generator, for keeping said signal generator output in phase with the output from said sensor means, a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator with output from one of said starter circuit and said phase detector circuit, and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 42
Dependent Claim
257 words
An inertial storage device comprising: a synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy, including a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; and a rotor having a plurality of circumferentially spaced teeth facing said stator teeth and a circumferential flywheel mass radially spaced from its rotational axis; and a motor control circuit including sensor means for sensing the position of said rotor relative to said stator; means, responsive to said sensor means, for generating a waveform for driving said machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; and a current control circuit for controlling amplitude of the current provided to said machine; said means for generating a waveform including a signal generator, a phase detector, responsive to said sensor means and said signal generator, for keeping said signal generator output in phase with the output from said sensor means, a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator with output from one of said starter circuit and said phase detector circuit, and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 43
Dependent Claim
221 words
A motor control circuit for generating a waveform for driving a synchronous rotary electrical machine having a stator including two axially spaced sets of circumferentially spaced teeth, field excitation means on said stator, stator windings including a plurality of coils each of which surrounds at least one tooth from each set and rotor having a plurality of circumferentially spaced teeth, and means for sensing the position of the rotor relative to the stator, the circuit comprising: means, responsive to said sensing means, for generating a waveform for driving said machine as a rotor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; a current control circuit for controlling amplitude of the current provided to said machine; said means for generating a waveform including a signal generator, a phase detector, responsive to said sensing means and said signal generator, for keeping said signal generator output in phase with the output from said sensing means, a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator with output from one of said starter circuit and said phase detector, and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 44
Dependent Claim
221 words
A motor control circuit for generating a waveform for driving a synchronous rotary electrical machine having a stator including two axially spaced sets of circumferentially spaced teeth, field excitation means on said stator, stator windings including a plurality of coils each of which surrounds at least one tooth from each set and rotor having a plurality of circumferentially spaced teeth, and means for sensing the position of the rotor relative to the stator, the circuit comprising: means, responsive to said sensing means, for generating a waveform for driving said machine as a rotor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; a current control circuit for controlling amplitude of the current provided to said machine; said means for generating a waveform including a signal generator, a phase detector, responsive to said sensing means and said signal generator, for keeping said signal generator output in phase with the output from said sensing means, a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator with output from one of said starter circuit and said phase detector, and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 45
Dependent Claim
150 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; a rotor having a plurality of circumferentially spaced teeth facing said stator teeth; and a motor control circuit including means for sensing the position of said rotor relative to said stator and means, responsive to said sensing means, for generating a waveform for driving said machine when it is operating as a motor, said means for generating a waveform including voltage controlled oscillator and a phase detector, responsive to said sensing means and said voltage controlled oscillator, for keeping said voltage controlled oscillator output in phase with the output from said sensing means.
Claim 46
Dependent Claim
150 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; a rotor having a plurality of circumferentially spaced teeth facing said stator teeth; and a motor control circuit including means for sensing the position of said rotor relative to said stator and means, responsive to said sensing means, for generating a waveform for driving said machine when it is operating as a motor, said means for generating a waveform including voltage controlled oscillator and a phase detector, responsive to said sensing means and said voltage controlled oscillator, for keeping said voltage controlled oscillator output in phase with the output from said sensing means.
Claim 47
Dependent Claim
217 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; a rotor having a plurality of circumferentially spaced teeth facing said stator teeth; and a motor control circuit including means for sensing the position of said rotor relative to said stator and means, responsive to said sensing means, for generating a waveform for driving said machine when it is operating as a motor, said means for generating a waveform including a signal generator and a phase detector, responsive to said sensoring means and said signal generator, for keeping said signal generator output in phase with the output from said sensing means, said means for generating a waveform including a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator an output from one of said starter circuit and said phase detector, and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 48
Dependent Claim
217 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; a rotor having a plurality of circumferentially spaced teeth facing said stator teeth; and a motor control circuit including means for sensing the position of said rotor relative to said stator and means, responsive to said sensing means, for generating a waveform for driving said machine when it is operating as a motor, said means for generating a waveform including a signal generator and a phase detector, responsive to said sensoring means and said signal generator, for keeping said signal generator output in phase with the output from said sensing means, said means for generating a waveform including a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator an output from one of said starter circuit and said phase detector, and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 49
Dependent Claim
207 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; a rotor having a plurality of circumferentially spaced teeth facing said stator teeth; and a motor control circuit including means for sensing the position of said rotor relative to said stator; means, responsive to said sensing means, for generating a waveform for driving said machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; said voltage control circuit including a frequency detector circuit for comparing the frequency of the output from said sensing means with a maximum frequency of said machine and providing a signal indicative thereof to adjust the amplitude of the input to the machine, said means for generating a waveform including a voltage controlled oscillator and a phase detector, responsive to said sensing means and said voltage controlled oscillator for keeping said signal generator output in phase with the output from said sensing means.
Claim 50
Dependent Claim
207 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; a rotor having a plurality of circumferentially spaced teeth facing said stator teeth; and a motor control circuit including means for sensing the position of said rotor relative to said stator; means, responsive to said sensing means, for generating a waveform for driving said machine when it is operating as a motor; a voltage control circuit for controlling the amplitude of said waveform for driving said machine; said voltage control circuit including a frequency detector circuit for comparing the frequency of the output from said sensing means with a maximum frequency of said machine and providing a signal indicative thereof to adjust the amplitude of the input to the machine, said means for generating a waveform including a voltage controlled oscillator and a phase detector, responsive to said sensing means and said voltage controlled oscillator for keeping said signal generator output in phase with the output from said sensing means.
Claim 51
Dependent Claim
266 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; a rotor having a plurality of circumferentially spaced teeth facing said stator teeth; and a motor control circuit including means for sensing the position of said rotor relative to said stator; means, responsive to said sensing means, for generating a waveform for driving said machine when it is operating as a motor, a voltage control circuit for controlling the amplitude of said waveform for driving said machine, said voltage control circuit including a frequency detector circuit for comparing the frequency of the output from said sensing means with a maximum frequency of said machine and providing a signal indicative thereof to adjust the amplitude of the input to the machine, said means for generating a waveform including a signal generator, a phase detector, responsive to said sensing means and said signal generator, for keeping said signal generator output in phase with the output from said sensing means, a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator an output from one of said starter circuit and said phase detector and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 52
Dependent Claim
266 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; field excitation means disposed on said stator to provide an axially polarized magnetic field; stator windings including a plurality of coils, each of which surrounds at least one tooth from each set; a rotor having a plurality of circumferentially spaced teeth facing said stator teeth; and a motor control circuit including means for sensing the position of said rotor relative to said stator; means, responsive to said sensing means, for generating a waveform for driving said machine when it is operating as a motor, a voltage control circuit for controlling the amplitude of said waveform for driving said machine, said voltage control circuit including a frequency detector circuit for comparing the frequency of the output from said sensing means with a maximum frequency of said machine and providing a signal indicative thereof to adjust the amplitude of the input to the machine, said means for generating a waveform including a signal generator, a phase detector, responsive to said sensing means and said signal generator, for keeping said signal generator output in phase with the output from said sensing means, a starter circuit for initially driving said signal generator, switching means for supplying the input of said signal generator an output from one of said starter circuit and said phase detector and detector means for operating said switching means to connect said phase detector to said signal generator and disconnect said starter circuit when said phase detector first detects a phase null.
Claim 53
Dependent Claim
162 words
An inertial energy storage device comprising: a synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy including a stator having two axially spaced sets of circumferentially spaced teeth; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole; and a motor control circuit including sensor means for sensing the position of said rotor relative to said stator; and means, responsive to said sensor means, for generating a waveform for driving said machine when it is operating as a motor.
Claim 54
Dependent Claim
162 words
An inertial energy storage device comprising: a synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy including a stator having two axially spaced sets of circumferentially spaced teeth; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole; and a motor control circuit including sensor means for sensing the position of said rotor relative to said stator; and means, responsive to said sensor means, for generating a waveform for driving said machine when it is operating as a motor.
Claim 55
Dependent Claim
129 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth, the teeth in one set being aligned with those in the other set; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; and stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole.
Claim 56
Dependent Claim
129 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth, the teeth in one set being aligned with those in the other set; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; and stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole.
Claim 57
Dependent Claim
129 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth, the teeth in one set being offset from those in the other set; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; and stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole.
Claim 58
Dependent Claim
129 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth, the teeth in one set being offset from those in the other set; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; and stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole.
Claim 59
Dependent Claim
155 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole; a motor control circuit including sensor means for sensing the position of said rotor relative to said stator; and means, responsive to said sensor means, for generating a waveform for driving said machine when it is operating as a motor.
Claim 60
Dependent Claim
155 words
A synchronous rotary electrical machine for bidirectional conversion between mechanical and electrical energy comprising: a stator having two axially spaced sets of circumferentially spaced teeth; axially polarized field excitation means disposed on said stator to provide an axially polarized magnetic field; a rotor having a plurality of circumferentially spaced magnetic poles facing said stator teeth and magnetic means interconnecting adjacent rotor poles; stator windings distinct from said field excitation means and including a plurality of coils, each of which surrounds, from one of said sets, at least one tooth which is covered by a rotor pole and, from the other of said sets, at least one tooth which is not simultaneously covered by a pole; a motor control circuit including sensor means for sensing the position of said rotor relative to said stator; and means, responsive to said sensor means, for generating a waveform for driving said machine when it is operating as a motor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |