US4567407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biased unitized motor alternator with stationary armature and field
Assignee: Individual
•
Filing: 1982-06-25
•
Granted: 1986-01-28
•
Expires: 2002-06-25
Abstract
Abstract A unitized (single unit) motor and flux switch alternator having stationary field, armature and motor windings which provides a magnetic path for some of the motor input power to feed through and increase the alternating current (AC) generator output. A rotor formed from a material having a high magnetic permeability (solid or laminated soft steel) is controlled in speed by controlling the magnitude and timing of the pulsed direct current (DC) supplied to the motor windings which may be wound on the stationary legs or the rotor. The current flow in the motor windings can be controlled by a mechanical commutator if the motor windings are on the rotor or by a solid-state converter if the motor windings are on the legs in a manner normally associated with brushless DC motors. The DC windings of the flux switch alternator can be replaced by permanent magnets since the reversing field in the AC output windings are predominantly time stationary.
Inventors
- 👤 John W. Ecklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:42
CPC Classifications
H; H02; H02K; H02K47/00; H02K47/02; H02K47/04; H02P; H02P25/00; H02P25/16; H02P25/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A unitized motor alternator for generating alternating current energy comprising in combination, a flux switch alternator having an stator with a plurality of pole pieces therein, AC output windings on said stator, a rotor having a high magnetic permeability and low magnetic retentivity, motor winding means on said stator, means for energizing said motor winding means to apply a conservative force to said rotor of said flux switch alternator and simultaneously induce AC voltage in said AC output windings and, means for coupling a load to said AC output windings.
Claim 2
Dependent Claim
90 words
A unitized motor alternator for generating alternating current energy comprising in combination, a flux switch alternator having an stator with a plurality of pole pieces therein, AC output windings on said stator, a rotor having a high magnetic permeability and low magnetic retentivity, motor winding means on said stator, means for energizing said motor winding means to apply a conservative force to said rotor of said flux switch alternator and simultaneously induce AC voltage in said AC output windings and, means for coupling a load to said AC output windings.
Claim 3
Dependent Claim
52 words
The invention definded in claim 1 wherein said motor windings are coupled to a source of direct current and means for controlling current flow from said source of direct current to said motor windings whereby the speed of rotation of said rotor is controlled to thereby control the generation of AC thereby.
Claim 4
Dependent Claim
14 words
The invention defined in claim 1 wherein said stator includes permanent magnet means therein.
Claim 5
Dependent Claim
22 words
The invention defined in claim 1 wherein said stator includes DC magnetizing coils, and DC motor coils and said AC output windings.
Claim 6
Dependent Claim
60 words
The unitized motor alternator for generating alternating current energy as defined in claim 1 wherein said means for energizing said motor windings to apply said conversative magnetic force to said rotor includes means for energizing said winding when said rotor gets to within 30 degrees of the leg and to deenergize said winding within about 10 degrees of said leg.
Claim 7
Dependent Claim
78 words
In an apparatus for converting direct current electrical energy to alternating current electrical energy, including, a flux switch alternator having an stator structure and AC output windings on said stator structure, a rotor having a high magnetic permeability and low magnetic retentivity, the improvement comprising, DC motor winding means on said stator, means for energizing said motor winding to apply a conservative magnetic force to drive said rotor and simultaneously induce alternating current in said AC output windings.
Claim 8
Dependent Claim
78 words
In an apparatus for converting direct current electrical energy to alternating current electrical energy, including, a flux switch alternator having an stator structure and AC output windings on said stator structure, a rotor having a high magnetic permeability and low magnetic retentivity, the improvement comprising, DC motor winding means on said stator, means for energizing said motor winding to apply a conservative magnetic force to drive said rotor and simultaneously induce alternating current in said AC output windings.
Claim 9
Dependent Claim
43 words
Apparatus as defined in claim 6 including means for controlling current flow from the source of direct current to said motor winding whereby the speed of rotation of said rotor is controlled to thereby control generation of AC energy in said output windings.
Claim 10
Dependent Claim
79 words
Apparatus as defined in claim 6 wherein said rotor has a plurality of lobes thereon and said stator has corresponding legs, and said means for energizing said motor winding to apply said conservative magnetic force to said rotor includes means for energizing said motor winding when a predetermined lobe of said rotor gets to within about 30 degrees of a leg of said stator and to deenergize said motor winding within about 10 degrees of the same said leg.
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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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |