Abstract: A motor control device for controlling the driving and regenerative operation of a motor includes CPU, ROM, RAM and a back-up RAM. An electric power is normally supplied from a subsidiary battery through a second regulator to the back-up RAM. An electric power is also supplied to the CPU, the ROM and the RAM through a main switch and a first regulator, on the one hand, and through the first regulator and a transistor which is turned ON when the number of revolutions of the motor becomes equal to or larger than a predetermined value, on the other hand. Therefore, even if the main switch is opened during traveling of a vehicle at a high speed, the counter-electromotive force of the motor can be decreased by the motor control device which is supplied with the electric power through the transistor to maintain its function, thereby preventing damage to an inverter.

Abstract: A motor torque control system has an inverter for converting a DC voltage from a battery into an AC voltage to energize an AC motor based on a command amplitude value. An input electric power calculating unit calculates an input electric power supplied from the battery based on a current and a voltage from the battery. A target electric power calculating unit calculates a target electric power to be supplied to the AC motor based on the rotational speed of the AC motor and a command torque value indicative of a torque to be produced by the AC motor. A PI control unit produces a control signal from the difference between the input electric power and the target electric power, and a PWM control unit controls the command amplitude value based on the control signal.

Abstract: A synchronous motor control system controls a synchronous motor on an electric vehicle for propelling the electric vehicle in a propulsive mode or regenerating electric energy in a regenerative model. The synchronous motor control system has a rotational speed sensor for detecting a rotational speed of the synchronous motor, an accelerator for producing a torque command signal, and a driver connected between a battery on the electric vehicle and the synchronous motor for operating the synchronous motor in either the propulsive mode or the regenerative mode. A controller is responsive to the rotational speed detected by the rotational speed sensor and the torque command signal produced by the accelerator for controlling the driver to operate the synchronous motor in either the propulsive mode or the regenerative mode.

Abstract: A false-creep generator device for an electric vehicle equipped with a transmission controls an electric motor to cause the electric vehicle to creep when the accelerator pedal of the electric vehicle is not depressed, no brake is applied to the electric vehicle, the transmission is in a drive or reverse position, and the speed of travel of the electric vehicle is lower than a predetermined creep speed.

Abstract: A gear shifting system for an automotive vehicle equipped with an internal combustion engine comprises a load sensor for sensing the shift load generated by a shifting motion of a driver or a rider, a power adjusting system for adjusting the engine power of the internal combustion engine, and a control unit for controlling the power adjusting system. The control unit is actuated in response to a signal from the load sensor when the sensed load is equal to or greater than a predetermined value, and outputs a control signal to the power adjusting system so as to adjust the engine power. The load sensor is assembled on a linkage system connected between a shift shaft of the power transmission and the shift pedal, so that the load sensor can detect a stretching load or a depressing load caused by shifting operation in the shift-up or shift-down mode, and for differentiating between them.