US3917029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transportation system with brake control and combined brake and field power supply
Assignee: ARTHUR H BERNDTSON
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Filing: 1974-05-10
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Granted: 1975-11-04
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Expires: 1994-05-10
Abstract
Abstract A solid-state static power converter receives a three-phase A.C. input and directly supplies direct current to a D.C. motor armature circuit to operate a traction sheave to control the movement of an elevator car in response to an error signal derived by the selective summation of a speed signal from a tachometer and a vehicle speed command signal. A combined solidstate static power converter receives the three-phase A.C. input and directly supplies direct current to a field circuit of the D.C. motor in response to the operation of a field gating control circuit and also directly supplies direct current to a brake operating solenoid circuit controlling a friction braking element selectively coupled to an output shaft of the D.C. motor. The combined field and brake static power converter includes three controlled rectifying devices and three diodes connected to selectively supply half-wave rectified uni-directional power to the field circuit while a fourth controlled rectifier is connected to one of the phases and cooperates with one or more of the diodes utilized in the field current conversion together with one field output lead to supply uni-directional energy to the brake solenoid. The brake gating control includes a summing circuit receiving an alternating phase reference signal from the source through a lag filter circuit, a disable signal from the source through lead and lag filtering circuits, a constant reference signal, and a brake energy command signal supplied from a second summing circuit. The second summing circuit receives a brake lifting command signal in response to the supervisory control and a brake energy sensed feedback signal.
Inventors
- 👤 John T Maynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:35
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/24; B66B1/28; B66B1/30; B66B1/308; B66B1/32
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
202 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means providing an output and moving said vehicle relative to said structure, braking means including a friction braking element coupled to said output and operable between lifted and set conditions to selectively permit vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selecting landing, said control means including brake control means connected to a source of energy and selectively supplying controlled amount of energy to said braking means, said brake control means including sensing means coupled to said braking means and providing a brake energy signal relating to the energy supplied to said braking means and command means providing a brake command signal commanding said braking element to operate to said lifted condition and output means controlling the amount of energy supplied from said source to said braking means in response to said command signal and said brake energy signal.
Claim 2
Dependent Claim
202 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means providing an output and moving said vehicle relative to said structure, braking means including a friction braking element coupled to said output and operable between lifted and set conditions to selectively permit vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selecting landing, said control means including brake control means connected to a source of energy and selectively supplying controlled amount of energy to said braking means, said brake control means including sensing means coupled to said braking means and providing a brake energy signal relating to the energy supplied to said braking means and command means providing a brake command signal commanding said braking element to operate to said lifted condition and output means controlling the amount of energy supplied from said source to said braking means in response to said command signal and said brake energy signal.
Claim 3
Dependent Claim
41 words
The system of claim 1, wherein said braking means includes a solenoid circuit connected to control the operation of said friction braking element, and said sensing means sensing the voltage across said solenoid circuit provide to provide said brake energy signal.
Claim 4
Dependent Claim
24 words
The system of claim 1, wherein said output means includes selectively controllable gated rectifying means connected to said source and to said braking means.
Claim 5
Dependent Claim
36 words
The system of claim 1, wherein said brake control means includes summing means providing an analog output to said output means in response to the direct summation of said command signal and said brake energy signal.
Claim 6
Dependent Claim
50 words
The system of claim 4, wherein said output means includes gated rectifying means connected to said source and to said braking means and a switching circuit selectively operable from a first condition to a second condition to selectively render said gated rectifying means conductive in response to said Analog output.
Claim 7
Dependent Claim
178 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means provided an output and moving said vehicle relative to said structure, braking means coupled to said output and selectively permitting vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selected landing, said control means including brake control means connected to a source of alternating energy and selectively supplying controlled amounts of energy to said braking means, said brake control means includng including means coupled to said source and providing an alternating source indicative signal relating to the alternating source energy and command means providing a brake command signal and output means controlling the amount of energy supplied from said source to said braking means in response to said command signal and said source indicative signal.
Claim 8
Dependent Claim
178 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means provided an output and moving said vehicle relative to said structure, braking means coupled to said output and selectively permitting vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selected landing, said control means including brake control means connected to a source of alternating energy and selectively supplying controlled amounts of energy to said braking means, said brake control means includng including means coupled to said source and providing an alternating source indicative signal relating to the alternating source energy and command means providing a brake command signal and output means controlling the amount of energy supplied from said source to said braking means in response to said command signal and said source indicative signal.
Claim 9
Dependent Claim
33 words
The system of claim 6, wherein said braking means includes a friction braking element selectively coupled to said motive means output and operable between lifted and set conditions to selectively permit vehicle movement.
Claim 10
Dependent Claim
38 words
The system of claim 6, wherein said brake control means includes summing means receiving said source indicative signal and said brake command signal, said sensing means including a lag filter network connecting said summing means and said source.
Claim 11
Dependent Claim
70 words
The system of claim 6, wherein said output means includes gated rectifying means connected to said source and said braking means, said brake control means includes disable means connected to said source and providing a disable signal, said output means responding to said disable signal and preventing the conduction of energy to said braking means by said gated rectifying means during a predetermined portion of each cycle of source energy.
Claim 12
Dependent Claim
53 words
The system of claim 9, wherein said brake control means includes summing means receiving said source indicative signal and said brake command signal and said disable signal, said disable means including a lag filter network connected to said summing means and a lead filter network connecting said lag filter network to said source.
Claim 13
Dependent Claim
32 words
The system of claim 6, wherein said brake control means includes summing means receiving said source indicative signal and said brake command signal and a constant reference signal provided by reference means.
Claim 14
Dependent Claim
69 words
The system of claim 6, wherein said brake control means includes summing means receiving said source indicative signal and said brake command signal and also receiving a constant reference signal provided by reference means and a disable signal provided by disable means and providing an output operatively permitting the supply of energy from said source to said braking means during a predetermined portion of each cycle of source energy.
Claim 15
Dependent Claim
61 words
The system of claim 6, wherein said brake control means includes summing means receiving said source indicative signal and said brake command signal and providing an output operatively controlling switching means providing an output selectively operable from a first condition to a second condition and selectively rendering gated rectifying means conductive to conduct energy from said source to said braking means.
Claim 16
Dependent Claim
24 words
The system of claim 13, wherein said second condition of said switching means output operatively connects energy storage means to said gated rectifying means.
Claim 17
Dependent Claim
69 words
The system of claim 14, wherein said switching means includes a first switching circuit having a first input circuit connected to said summing means and a first output circuit connected second input a second circuit of a second switching circuit having a second output connected to said storage means through a primary wiNding of an output transformer, said transformer having an output winding connected to said gated rectifying means.
Claim 18
Dependent Claim
64 words
The system of claim 6, wherein said brake control means includes sensing means coupled to said braking means and providing a brake energy signal relating to the energy supplied to said braking means, said output means responding to said command signal and said source indicative signal and said brake energy and controlling the amount of energy supplied from said source to said braking means.
Claim 19
Dependent Claim
13 words
The system of claim 6, wherein said output means includes gated rectifying means.
Claim 20
Dependent Claim
141 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means providing an output and moving said vehicle relative to said structure, braking means including a solenoid circuit connected to control the operation of a friction braking element coupled to said output and selectively permitting vehicle movement, and control means including brake control means having a selectively controllable gated rectifying means connected to a source of energy, said control means operable to simultaneously supply energy to said motive means and uni-directional energy to said solenoid circuit and operate said braking means and control the movement of said vehicle relative to the structure and stop said vehicle at a selected landing.
Claim 21
Dependent Claim
141 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means providing an output and moving said vehicle relative to said structure, braking means including a solenoid circuit connected to control the operation of a friction braking element coupled to said output and selectively permitting vehicle movement, and control means including brake control means having a selectively controllable gated rectifying means connected to a source of energy, said control means operable to simultaneously supply energy to said motive means and uni-directional energy to said solenoid circuit and operate said braking means and control the movement of said vehicle relative to the structure and stop said vehicle at a selected landing.
Claim 22
Dependent Claim
211 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means providing an output and moving said vehicle relative to said structure, braking means coupled to said output and selectively permitting vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selected landing, said control means including brake control means connected to a source of alternating energy annd selectively supplying controlled amounts of energy to said braking means, said brake control means including first summing means receiving a first brake command signal from command means and a brake energy signal relating to the energy supplied to said braking means provided by first sensing means coupled to said braking means and providing a first summing means output to second summing means receiving an alternating source indicative signal relating to the alternating source energy provided by second sensing means coupled to said source and providing a second summing means output operatively controlling the magnitude of uni-directional energy supplied to said braking means.
Claim 23
Dependent Claim
211 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means providing an output and moving said vehicle relative to said structure, braking means coupled to said output and selectively permitting vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selected landing, said control means including brake control means connected to a source of alternating energy annd selectively supplying controlled amounts of energy to said braking means, said brake control means including first summing means receiving a first brake command signal from command means and a brake energy signal relating to the energy supplied to said braking means provided by first sensing means coupled to said braking means and providing a first summing means output to second summing means receiving an alternating source indicative signal relating to the alternating source energy provided by second sensing means coupled to said source and providing a second summing means output operatively controlling the magnitude of uni-directional energy supplied to said braking means.
Claim 24
Dependent Claim
191 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means having an output and a field circuit operatively coupled to a polyphase energy source and moving said vehicle relative to said structure, braking means coupled to said output and selectively permitting vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selected landing, said control means including a pair of rectifying devices connected to each source phase and connected across first and second output leads connected to said field circuit and a gated rectifying device connected to one of said source phases and to a third output lead, said first and third output leads connected to said braking means, said control means including brake control meanS connected to operatively control the operations of said gated rectifying device and the flow of energy from said source to said braking means.
Claim 25
Dependent Claim
191 words
A transportation system having a guide path structure and a plurality of spaced landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means having an output and a field circuit operatively coupled to a polyphase energy source and moving said vehicle relative to said structure, braking means coupled to said output and selectively permitting vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selected landing, said control means including a pair of rectifying devices connected to each source phase and connected across first and second output leads connected to said field circuit and a gated rectifying device connected to one of said source phases and to a third output lead, said first and third output leads connected to said braking means, said control means including brake control meanS connected to operatively control the operations of said gated rectifying device and the flow of energy from said source to said braking means.
Claim 26
Dependent Claim
22 words
The system of claim 20, wherein said control means further includes a fly-back diode connected between said first and third output leads.
Claim 27
Dependent Claim
27 words
The system of claim 20, wherein one of each of said pairs of rectifying devices includes a gated rectifying device selectively controlled by field gating control means.
Claim 28
Dependent Claim
134 words
A transportation system having a guide path structure and a plurality of space landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means having an output and a field circuit operatively coupled to energy source means and moving said vehicle relative to said structure, braking means coupled to said output and selectively permitting vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selected landing, said control means including means connected to said source means and including a uni-directional energy conducting element directly connected to supply energy to said brraking means and said field circuit.
Claim 29
Dependent Claim
134 words
A transportation system having a guide path structure and a plurality of space landings and transportation means comprising a transport vehicle, means mounting said vehicle for movement relative to said structure in a path extending adjacent each of said landings, motive means having an output and a field circuit operatively coupled to energy source means and moving said vehicle relative to said structure, braking means coupled to said output and selectively permitting vehicle movement, and control means cooperating with said motive means and said braking means and controlling movement of said vehicle relative to the structure and stopping said vehicle at a selected landing, said control means including means connected to said source means and including a uni-directional energy conducting element directly connected to supply energy to said brraking means and said field circuit.
Claim 30
Dependent Claim
31 words
The system of claim 23, wherein said field circuit includes field windings and said braking means includes solenoid windings, said uni-directional element directly electrically connected to said field and solenoid windings.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |