Electricity: motive power systems – With particular motor-driven load device – Power- or motion-transmitting mechanism
Patent
1982-03-15
1983-12-06
Truhe, J. V.
Electricity: motive power systems
With particular motor-driven load device
Power- or motion-transmitting mechanism
318139, 318376, 180 65E, H07D 314
Patent
active
044196105
ABSTRACT:
A reversible regenerating drive system for a vehicle includes a constant speed, bi-directional motor which is energized by a source of power. The constant speed motor is coupled to a variable ratio transmission which in turn converts the output torque of the motor and delivers it to the vehicle to drive it in either forward or reverse directions at varying speeds. The transmission ratio and the direction of rotation of the motor are determined in accordance with signals derived from a pair of operator demand switches which are used to select the desired torque to be applied to the vehicle. The motor is arranged to generate power back to the source when torque demand is in a direction opposite to rotation of the motor. The direction of rotation of the motor is commanded to follow the direction of torque demand if the output speed of the transmission is below a predetermined value, but remains unchanged when torque direction changes if the output speed of the transmission is above the predetermined value.
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"Electric Vehicle CVTs Evaluated" from Automotive Engineering, Sep. 1981.
Evans A.
Sundstrand Corporation
Truhe J. V.
Wood Dalton, Phillips Mason & Rowe
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