Electricity: motive power systems – With particular motor-driven load device – Power- or motion-transmitting mechanism
Patent
1982-02-01
1982-10-12
Truhe, J. V.
Electricity: motive power systems
With particular motor-driven load device
Power- or motion-transmitting mechanism
318 49, 318 76, 318149, 318655, 74710, 74847, 180 65B, 290 14, H02P 116
Patent
active
043541445
ABSTRACT:
A continuously variable transmissionless drive system providing maximum torque at low speeds. The system is usable in a hybrid vehicle having a prime mover, such as an internal combustion engine, operated at its optimum rpm for efficiency. The prime mover drives a pair of amplidynes which in turn operate a pair of dc motors to produce rotation of the output shaft for driving the wheels of the vehicle via a novel differential drive system which drives the output shafts in which the effective gear ratio may be externally controlled to vary from a very high step down ratio producing very high torque to a one-to-one ratio for driving at a constant speed. Each drive motor is connected to a separate bevel gear in the differential and control of the output shaft speed and torque is obtained by controlling the speed and direction of rotating of the bevel drive gears. When the two bevel drive gears are rotating at the same rpm but in opposite directions, no output is obtained from the output shafts of the differential unit. When there is a difference in speed between the two bevel drive gears, a spider assembly in the differential unit will rotate at an rpm equal to one-half of the difference in the speeds of the two bevel drive gears and will drive the output shafts at that rpm. The speeds of the motors are controlled by controlling two closed loop servo systems including the amplidynes using two rpm reference signals produced by a network of synchros and small dc control motors. The dc control motors are responsive to signals generated by a foot pedal control operating an acceleration control system.
REFERENCES:
patent: 2179364 (1939-11-01), Weber
patent: 2480065 (1949-08-01), Wanner
patent: 2795747 (1957-06-01), Wellington et al.
patent: 2796565 (1957-06-01), Walcott
patent: 2924767 (1960-02-01), Myles
patent: 2951397 (1960-09-01), Schroeder
patent: 3084579 (1963-04-01), Melville
patent: 3202893 (1965-08-01), Arp et al.
Moose Richard M.
Truhe J. V.
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