Protective control apparatus for electrical vehicle

Claim 1

In a control apparatus for electric vehicles comprising a d-c power supply, a d-c motor to be selectively connected to said power supply, a chopper circuit which periodically applies the voltage of said power supply to said motor in response to the amount of actuation of the accelerator pedal, a current detector which detects the current that flows into said motor, a computer for controlling said chopper circuit based upon an instruction signal from said accelerator pedal and a detection current from said current detector, and an interrupt signal generator which generates an interrupt signal for starting said computer in synchronism with the control signal which controls said chopper circuit, the improvement comprising means for generating a predetermined signal, means for adding output signals from said signal generating means to the instruction signal of said accelerator pedal, means for comparing said added signal with a signal that corresponds to the output of said current detector, and means for resetting said computer to stop normal operation of said d-c motor when the signal corresponding to the output of said current detector is greater than said added signal and for initializing said computer a predetermined time after said resetting to start again the normal operation of said d-c motor after said predetermined period of time has passed.