Patent US1347006A successfully refreshed from Google Patents.
Patent US3629676A successfully refreshed from Google Patents.
US3629676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traction motor temperature control of locomotive power
Assignee: Motors Liquidation Co
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Filing: 1970-04-09
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Granted: 1971-12-21
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Expires: 1990-04-09
Abstract
Abstract A system for controlling the power output of the generator of a locomotive as a function of the temperature of the traction motors connected to the generator. The system utilizes an electrical heater element connected in series with at least one traction motor and the heater generates an amount of heat which is a function of the amount of current being supplied to the traction motor. The heater element forms part of a simulator such that the temperature developed by it simulates the operating temperature of the traction motor for a given traction motor current. A temperature sensitive resistance element senses the temperature of the simulator and is connected with a control circuit so as to vary the excitation and output power of the generator as a function of the temperature sensed by the resistance element. The simulator and traction motors are arranged such that they both are at substantially the same ambient temperature.
Inventors
- 👤 Max Ephraim Jr
- 👤 Earl D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
B; B60; B60L; B60L3/00; B60L3/12; G; G05; G05D; G05D23/00; G05D23/19; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
195 words
A power control system for an electric motor comprising, a generator having an output winding and a field winding, an electric motor adapted to be drivably connected with a load, means connecting said motor with said output winding of said generator, a motor temperature simulator comprising an electrical heater and a block of heat conductive material located in heat exchange relationship with said heater, means connecting said electrical heater in series with said motor, said simulator being disposed outside of said motor, said simulator developing a temperature which is a function of motor current whereby said temperature is related to the internal temperature of said motor, temperature detection means comprising a temperature sensitive resistor located in heat exchange relationship with said block of heat conductive material for sensing the temperature of said simulator, control means coupled to said temperature sensitive resistor and to said field winding of said generator for controlling the excitation of said field winding of said generator for controlling the excitation of said field winding as a function of the temperature developed by said simulator, and means subjecting said simulator and the interior of said motor to substantially the same temperature environment.
Claim 2
Dependent Claim
195 words
A power control system for an electric motor comprising, a generator having an output winding and a field winding, an electric motor adapted to be drivably connected with a load, means connecting said motor with said output winding of said generator, a motor temperature simulator comprising an electrical heater and a block of heat conductive material located in heat exchange relationship with said heater, means connecting said electrical heater in series with said motor, said simulator being disposed outside of said motor, said simulator developing a temperature which is a function of motor current whereby said temperature is related to the internal temperature of said motor, temperature detection means comprising a temperature sensitive resistor located in heat exchange relationship with said block of heat conductive material for sensing the temperature of said simulator, control means coupled to said temperature sensitive resistor and to said field winding of said generator for controlling the excitation of said field winding of said generator for controlling the excitation of said field winding as a function of the temperature developed by said simulator, and means subjecting said simulator and the interior of said motor to substantially the same temperature environment.
Claim 3
Dependent Claim
210 words
A power control system for a vehicle comprising, a main power generator having an output winding and a field winding, a direct current series traction motor adapted to be coupled to a wheel of said vehicle, means electrically connecting said traction motor with said output winding of said generator, a temperature simulator comprising an electrical heating element located in heat exchange relationship with a block of heat conductive material, means connecting said heating element in series with said traction whereby said heating element generates heat as a function of the magnitude of traction motor current to thereby cause said temperature simulator to develop a temperature which is a function of the internal temperature of said traction motor, temperature detection means comprising a temperature sensitive resistor located in heat exchange relationship with said block of heat conductive material, control means connected with said temperature sensitive resistor and said field winding of said generator for controlling the excitation of said field winding of said generator as a function of the temperature of said simulator, said simulator and temperature detector being disposed outside of said traction motor, and means subjecting said simulator and temperature detector to a temperature environment that is substantially the same as that of the interior of said traction motor.
Claim 4
Dependent Claim
210 words
A power control system for a vehicle comprising, a main power generator having an output winding and a field winding, a direct current series traction motor adapted to be coupled to a wheel of said vehicle, means electrically connecting said traction motor with said output winding of said generator, a temperature simulator comprising an electrical heating element located in heat exchange relationship with a block of heat conductive material, means connecting said heating element in series with said traction whereby said heating element generates heat as a function of the magnitude of traction motor current to thereby cause said temperature simulator to develop a temperature which is a function of the internal temperature of said traction motor, temperature detection means comprising a temperature sensitive resistor located in heat exchange relationship with said block of heat conductive material, control means connected with said temperature sensitive resistor and said field winding of said generator for controlling the excitation of said field winding of said generator as a function of the temperature of said simulator, said simulator and temperature detector being disposed outside of said traction motor, and means subjecting said simulator and temperature detector to a temperature environment that is substantially the same as that of the interior of said traction motor.
Claim 5
Dependent Claim
197 words
A power control system for a vehicle comprising, a main power generator having an output winding and a field winding, a series direct current traction motor adapted to be coupled to a wheel of said vehicle for driving said wheel, means electrically connecting said traction motor and comprising an electrical heating element located in heat exchange relationship with a block of heat conductive material, means connecting said heating element in series with said motor, said heating element and block of conductive material proportioned such that said simulator develops a temperature which substantially simulates the internal temperature of said traction motor for a given traction motor current, a temperature detector comprising a temperature sensitive resistor disposed adjacent said simulator for sensing the temperature of said simulator, control means coupled to said temperature sensitive resistor and to said field winding of said generator for varying the excitation of said field winding as a function of the temperature sensed by said temperature detector, and means for supplying cooling air to the interior of said traction motor and to said temperature simulator to thereby subject the interior of said traction motor and said temperature simulator to substantially the same temperature environment.
Claim 6
Dependent Claim
197 words
A power control system for a vehicle comprising, a main power generator having an output winding and a field winding, a series direct current traction motor adapted to be coupled to a wheel of said vehicle for driving said wheel, means electrically connecting said traction motor and comprising an electrical heating element located in heat exchange relationship with a block of heat conductive material, means connecting said heating element in series with said motor, said heating element and block of conductive material proportioned such that said simulator develops a temperature which substantially simulates the internal temperature of said traction motor for a given traction motor current, a temperature detector comprising a temperature sensitive resistor disposed adjacent said simulator for sensing the temperature of said simulator, control means coupled to said temperature sensitive resistor and to said field winding of said generator for varying the excitation of said field winding as a function of the temperature sensed by said temperature detector, and means for supplying cooling air to the interior of said traction motor and to said temperature simulator to thereby subject the interior of said traction motor and said temperature simulator to substantially the same temperature environment.
Claim 7
Dependent Claim
191 words
A power control system for a vehicle comprising, a generator having an output winding and a field winding, a traction motor adapted to be connected with a wheel of said vehicle for propelling said vehicle, means connecting said traction motor with said output winding of said generator, a traction motor temperature simulator comprising an electrical heater and a block of heat conductive material located in heat exchange relationship with said heater, means connecting said electrical heater in series with said traction motor, said simulator being disposed outside of said traction motor, said simulator developing a temperature which is a function of motor current whereby said temperature is related to the internal temperature of said traction motor, a temperature sensitive resistor located in heat exchange relationship with said block of heat conductive material for sensing the temperature of said simulator, control means coupled to said temperature sensitive resistor and to said field winding of said generator for controlling the excitation of said field winding as a function of the temperature developed by said simulator, and means subjecting said simulator and the interior of said traction motor to substantially the same temperature environment.
Claim 8
Dependent Claim
191 words
A power control system for a vehicle comprising, a generator having an output winding and a field winding, a traction motor adapted to be connected with a wheel of said vehicle for propelling said vehicle, means connecting said traction motor with said output winding of said generator, a traction motor temperature simulator comprising an electrical heater and a block of heat conductive material located in heat exchange relationship with said heater, means connecting said electrical heater in series with said traction motor, said simulator being disposed outside of said traction motor, said simulator developing a temperature which is a function of motor current whereby said temperature is related to the internal temperature of said traction motor, a temperature sensitive resistor located in heat exchange relationship with said block of heat conductive material for sensing the temperature of said simulator, control means coupled to said temperature sensitive resistor and to said field winding of said generator for controlling the excitation of said field winding as a function of the temperature developed by said simulator, and means subjecting said simulator and the interior of said traction motor to substantially the same temperature environment.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |