초록 ▼

A DC motor controller for use with a battery powered DC motor operatively positioned in a vehicle is disclosed. A power source-watch dog circuit 2 monitors a micro computer 8 and decreases the battery supplied voltage to below a predetermined voltage. A key switch input circuit 3 receives a switch-o

A DC motor controller for use with a battery powered DC motor operatively positioned in a vehicle is disclosed. A power source-watch dog circuit 2 monitors a micro computer 8 and decreases the battery supplied voltage to below a predetermined voltage. A key switch input circuit 3 receives a switch-on signal generated by a key switch and outputs a signal to the power source-watch dog circuit 2 to initiate electrical power output from the battery 1 to the micro computer 8. A pedal input circuit 4, which includes a pedal for varying electrical resistance, converts the varied resistance into an analog signal and outputs the analog signal to the micro computer 8. The micro computer converts the analog signal to a digital signal and outputs the digital signal. A D/A converter converts the digital signal outputted by the micro computer into an analog signal and outputs the analog signal. A pulsewidth modulator 10 modulates the analog signal and outputs the modulated signal. A gate output circuit 11 generates a logic signal having a “high”or a “ low”level according to the modulated signal outputted by the pulsewidth modulator 10 and outputs the logic signal to a motor driver 16 which operates the DC motor. A battery voltage sensor 7 senses the voltage of the battery 1 and outputs a battery voltage sensor signal to the micro computer 8. A temperature sensor 13 senses the temperature of the motor driver and outputs a temperature sensor signal to the micro computer 8. An output current sensor circuit 12 senses current flowing through the motor driver 16 and outputs a current sensor signal to the micro computer 8. A vehicle direction changing sensor 6 prevents an overload of the DC motor 17 by sensing an abrupt change in the direction the vehicle is being driven and outputs a vehicle direction changing sensor signal to the micro computer 8.

대표청구항 ▼

A DC motor controller operated by a battery and a micro computer, comprising: a power source and watch dog circuit 2 for dropping the voltage of said battery and monitoring operation of said micro computer 8; a key switch input circuit 3 connected to said power source and watch dog circuit 2 for rec

A DC motor controller operated by a battery and a micro computer, comprising: a power source and watch dog circuit 2 for dropping the voltage of said battery and monitoring operation of said micro computer 8; a key switch input circuit 3 connected to said power source and watch dog circuit 2 for recognizing the operation state of a key switch; a pedal input circuit 4 for converting the condition of a pedal being pressed into a resistance value; a vehicle running direction changing sensor 6 for sensing the running direction of a vehicle; a battery voltage sensor 7 for sensing the voltage of said battery; wherein the micro computer 8 is connected to said power source and watch dog circuit 2, said pedal input circuit 4, said vehicle running direction changing sensor 6 and said battery voltage sensor 7 for processing the input signals inputted therefrom; a D/A converter 9 connected to said micro computer for converting the digital signal inputted from said micro computer into an analogue signal; a pulse－width modulator 10 connected to said D/A converter 9 for modulating the inputted signal into a signal having a pulse－width; a gate output circuit 11 connected to said pulse－width modulator 10 for generating either a “high”or “low”level signal depending upon the input signal inputted therefrom; a motor driver 16 connected to said gate output circuit 11, said motor driver 16 for controlling a motor device 15 connected to said motor driver 16, said controlling being according to an input signal from said gate output circuit 11, with said motor driver 16 further including a plurality of power elements; a mounting body 18 of heat dissipating construction for protecting said plurality of power elements comprises in said motor driver 16 from heat; an output current sensor 12 connected to said motor driver 16 for sensing the output current transferred from said motor driver 16 and supplying the sensed signal to said micro computer 8; and a temperature sensor 13 connected to said motor driver 16 for sensing the temperature of said motor driver 16 and supplying the sensed signal to said micro computer 8. A DC motor controller for use with a battery powered DC motor, said controller comprising: a micro computer 8; a power source-watch dog circuit 2 for monitoring said micro computer 8 and for decreasing the battery supplied voltage to below a predetermined voltage; a key switch input circuit 3 for receiving a switch-on signal generated by a key switch and for outputting a signal to said power source-watch dog circuit 2 to initiate electrical power output from the battery 1 to said micro computer 8; a pedal input circuit 4 including a pedal for varying electrical resistance in accordance with the extent said pedal is pressed, said pedal input circuit 4 converting said varied resistance into an analog signal and outputting said analog signal to said micro computer 8; said micro computer converting said analog signal to a digital signal and outputting said digital signal; a D/A converter for converting said digital signal outputted by said micro computer into an analog signal and outputting said analog signal; a pulsewidth modulator 10 for modulating said analog signal outputted by said D/A converter and outputting said modulated signal; and a gate output circuit 11 for generating a logic signal having a “high”or a “low”level according to said modulated signal outputted by said pulsewidth modulator 10 and outputting said logic signal to a motor driver 16 which operates said DC motor in accordance with said logic signal outputted from said gate output circuit 11.