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ELECTRIC CAR PROJECTS

Updated: 01/2013

60A PWM MOTOR SPEED CONTROLLER

This circuit diagram is based on PWM (Pulse Wide Modulation) to control the speed of a DCmotor. PWM is controlled by IC TL494 which has the advantage that can be controlled by usingthe frequency 100Hz, with the rise and fall time of 10uS. PWM range can be adjusted from 0-100%. You can adjust the speed of a DC motor with a turn potentiometer VR5.Picture of finshed PWM Motor controller V2.

Picture of finshed PWM Motor controller V1.

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The circuit diagram for the motor driver using MOSFET. Especially for this circuit can drive aDC motor with 250W power. We had use 120A/60V MOSFET and one diode MBR3045V. Onstart up motor draw more than 30 Amps.

On start up motor draw more than 50 Amps after that constant draw is about 30A.

The following is a schematic drawing for PWM Motor speed control V1:

http://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/60A%20Motor%20Speed%20Control%20Schematic.pnghttp://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/60A%20Motor%20Speed%20Control%20Schematic.png

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The circuit converts a DC voltage into series of pulses, such that the pulse duration is directlyproportion to the value of the DC voltage. The great advantage of such a circuit is that almostno power is lost in the control circuit.Operation voltage is: 12V to 24 V, minimum current consumption is about 35mA. Efficiency isbetter than 90% at full load. The PWM Motor speed controlers V2 and V3 has also voltageoperation of 12 to 24V and can handle 20A.

PCB is aviable to download for the 20A and 40A DC Motor Controllers, the pcb is real size!

-PWM Motor speed controlelrs top view-PWM Motor speed controllers PCB's

The Controller can be used for DIY Motor Electric Bike, Electric Scooters etc. If you like toincrease the power, you should increase the number of MOSFET.

http://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/PWM_motor_speed%20control_top_view.pdfhttp://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/PWM_motor_speed%20control_top_view.pdfhttp://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/PWM_motor_speed%20control_top_view.pdfhttp://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/PWM_motor_speed_control_PCB.pdfhttp://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/PWM_motor_speed_control_PCB.pdfhttp://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/PWM_motor_speed_control_PCB.pdfhttp://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/PWM_motor_speed_control_PCB.pdfhttp://www.electronica.mk/all_articles/Electric_Car_Projects/PWM_Motor_Control/PWM_motor_speed%20control_top_view.pdf