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How to Reduce Power Loss in a PWM Motor Control

The Pulse-Width Modulation (PWM) control is used to administer power for inertial electrical devices. Turn the supply switch on and off at a rapid pace to control the supply of current. The speed can range from several per minute for a stove to thousands per minute for a radio amplifier. To reduce power loss, arrange the control for maximum efficiency.

Things You'll Need

Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET)

Instructions

- 1
  Examine the Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) on the PWM. You must the decrease the switching time of the transistor to reduce power loss.
- 2
  Control the PWM cycle by choosing a high power, high density, brushless DC motor to provide the energy for the PWM.
- 3
  Utilize a MOSFET with a low RDS(on) which expends less energy on each switch.
- 4
  Match the circuit type with the MOSFET that you are using. In other words, high voltage circuits should be matched with corresponding MOSFETs and vice versa. As these align, less power is lost.
- 5
  Apply a single switch chopper to regulate the electric impulses. It controls the current speed and matches it to the switching cycle to vastly improve efficiency and reduce power loss for the PWM.

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