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High Current PWM Bidirectional DC Motor Speed Controller

Monday, December 14th, 2020 - Electronic Hobby

Description Of High Current PWM Bidirectional DC Motor Speed Controller

High Current PWM Bidirectional DC Motor Speed Controller is a series that can be used to control the speed and direction of rotation of dc motor with big power. High Current PWM Bidirectional DC Motor Speed Controller implement widht Pulse Modulation (PWM) to control the speed of a DC motor. The series in the article High Current PWM Bidirectional DC Motor Speed Controller is able to control the DC motor with maximum current up to 49A. Power motor drivers on the circuit High Current PWM Bidirectional DC Motor Speed Controller uses the MOSFET IRFZ44 (Max 49A) and IRF 4905 (Max 74A).

Circuit Of High Current PWM Bidirectional DC Motor Speed Controller

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Each function Bidirectional Part Series High Current DC Motor PWM Speed Controller

  • Section power MOSFET drivers will only work one pair only. MOSFET Q3 and Q6 serves to regulate the speed of DC motor rotation in one direction only and then to set the direction of rotation opposite the MOSFET Q4 and Q5.
  • Condition Q3, Q6 and Q4, Q5 is controlled by the IC and IC 1C 1D. IC 1C and 1D IC serves as a comparator receiving a reference voltage circuit voltage from a voltage divider R6, R7 and R8.Dengan circuit configuration as shown above, the IC 1D will get triger when the input signal is greater than the reference voltage which IC1C vice versa.
  • Op Amp IC 1B to function as a triangular wave generator. With the frequency fixed and determined by the value of R5 and C1 is 270Hz. reduce the value of R5 and C1 will increase its output frequency.
  • Offset voltage is controlled by potentiometer P1 through IC 1A. With the configuration of the voltage follower IC 1A as it will give effect to the IC 1B, which will affect the output voltage level triangular wave generated IC 1B. The size of the voltage offset will make the motor speed change and then turned toward his swivel.

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