| 摘要 |
PURPOSE: To compensate a voltage of a pulse width modulation servo mechanism without influence of change of battery voltage of vehicle on power gain of motor. CONSTITUTION: A variable voltage of power supply is sensed and the result is processed to generate a voltage compensating signal in order to shift a transmission by a servo mechanism providing shift mechanisms 30, 19 following the shift instruction 140', control 136' to generate an error signal by receiving a signal. from the position sensor 48 and the power supply 60 for variable voltage which may be connected to the motor 32 by the pulse width modulation switches 82, 66. The duty cycle of pulse width modulation of switch is controlled depending on the process error signal 171' and voltage compensating signal from the controller, thereby duty cycle changes depending on both process error signal and voltage compensating signal, motor performance is determined by the process error signal almost not receiving any influence of the voltage change of power supply. |
