How to Design and Implement a PWM Motor Control Circuit
Learn how to design and implement a PWM motor control circuit using an Arduino, MOSFET, and diode to efficiently control DC motor speed.
How to Design and Implement a PWM Motor Control Circuit
Pulse Width Modulation (PWM) is one of the most effective techniques used to control the speed of DC motors. It is widely used in applications such as robotics, fans, pumps, electric vehicles, and industrial automation. This article provides an in-depth guide on how to design and implement a PWM motor control circuit from scratch, covering essential components, design principles, and practical implementation. What is PWM? Pulse Width Modulation (PWM) is a technique of controlling the average voltage supplied to a load (in this case, a DC motor) by rapidly switching the power on and off. The duty cycle of the signal determines how long the switch remains on in a given period. Duty Cycle (%) = T O N T O N + T O F F × 100 \frac{T_{ON}}{T_{ON} + T_{OFF}} \times 100 For example: 0% duty cycle = always OFF (motor off) 50% duty cycle = ON half the time (motor at half speed) 100% duty cycle = always ON (motor full speed) Why Use PWM for Motor Control? Efficient speed control (minimal heat loss) Lower power consumpt…
About the author
Prasun Barua is a graduate engineer in Electrical and Electronic Engineering with a passion for simplifying complex technical concepts for learners and professionals alike. He has authored numerous highly regarded books covering a wide range of elec…
