![]() ![]() Additionally you can put the radiator, but the current does not exceed 5A do not think is appropriate. This assembly was tested with an engine that had a rated current of 4A and transistors temperature no more than 30 degrees. ![]() To avoid skin effect due to motor windings maximum PWM frequency is 10KHz. Meanwhile other MOSFET will be placed in logical 0 by the controller. Variation of duty cycle will vary the speed of rotation. To switch low side MOSFET I used driver current 2A, MAX627.Īccording to the diagram, to rotate the electric motor in a sense we need to apply the command on to the point A (5V from ATMEGA328) and low side MOSFET diagonally ordering the PWM duty cycle between 0 and 100%. For hig side the use IRF5305, which also rds-on small and low gate charge. The motor with optical encoder wired to Arduino. The proper approach requires a PID (proportional-integral-derivative) control algorithm which adjusts motor speed using PWM. Due to inertia, it continues to move a bit, even with the motor electrically shorted. For low side mosfet i use IRF3205 that have very low RDS on and low gate charge. Suddenly stopping the motor will not result in a sudden stop of the sliding block. My concept is a montage H bridge using only low side mosfet to control engine speed, and high side mosfet is used only to open and close the circuit. ![]()
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