Electricity: motive power systems – Constant motor current – load and/or torque control
Patent
1994-05-10
1995-05-02
Ro, Bentsu
Electricity: motive power systems
Constant motor current, load and/or torque control
318139, H02P 700, B60K 1706
Patent
active
054122945
ABSTRACT:
The invention provides an apparatus for preventing transmission shock in an automatic transmission equipped vehicle which can reliably prevent the generation of the transmission shock by controlling the motor speed at shifting. The apparatus comprises a torque control means for controlling the motor drive torque, a speed control means for controlling the motor drive speed, a speed control initiation determination means for determining the time for initiating speed control based on a shift command, a speed control termination determination means for determining the time for terminating speed control based on an output shaft rpm, the shift command and the motor rpm, and a speed control and torque control switching means for switching into speed control or torque control based on the outputs of the speed control initiation determination means and the speed control termination determination means. The speed control and torque control switching means switches from torque control into speed control in response to the speed control initiation, and switches from speed control into torque control in response to the termination speed control. Speed control reduces the difference between the motor rpm and the value obtained by dividing the output shaft rpm by the gear ratio after shifting in response to the shift command is no more than a fixed value.
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patent: 4367528 (1983-01-01), Kawamoto et al.
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Mitsubishi Denki & Kabushiki Kaisha
Ro Bentsu
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