BLDC Motor Speed Control

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Brushless Permanent Magnet Motors, Permanent Magnet AC motors, Permanent Magnet Synchronous Motors etc. The confusion arises because a brushless dc motor does not directly operate of a dc voltage source. However, as we shall see, the basic principle of operation is similar to a dc motor.

In every industry there are processes some form that require adjustment for normal operation. Such adjustments are usually accomplished with variable speed drive and it consists of

  1. Controller
  2. Power Converter
  3. Electric Motor

Controller: The controller generates PWM signal to the converter & hence forms the heart of the Variable speed system.

Power Converter: It controls the power flow from an AC supply to the motor by appropriate control of power semiconductor switches (part of power Converter).

Electric Motor: It is connected directly/indirectly to the load.

The BLDC motor speed control is driven by employing various converters and the converter is mainly used for low voltage DC supply to High voltage DC supply. The various BLDC motor control techniques are shown below,

  1. BLDC Motor Speed Control
  2. BLDC Motor Speed Control by Using DSPIC Controller
  3. BLDC Motor Speed Control By Employing ZETA Converter
  4. BLDC Motor Speed Control By Employing LUO Converter
  5. BLDC Motor Speed Control By Employing BOOST Converter
  6. BLDC Motor Speed Control By Employing SEPIC Converter

1. BLDC Motor Speed Control

Click here for Video Demo

This project is used for control the speed of the BLDC motor. The motor speed is depends on frequency of the three phase inverter circuit.

2. BLDC Motor Speed Control By Using DSPIC Controller

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This project describes the speed control of BLDC motor with the dsPIC30F4011 Digital Signal Controller. By using the Hall effect sensors of BLDC Motor, the dsPIC30F4011 controller generates the controlled switching pulses for inverter. The speed control is done by changing the duty cycle of PWM from dsPIC30F4011.

Prototype Model for speed control of BLDC motor by using DSPIC controller

3. BLDC Motor Speed Control By Employing ZETA Converter

Click here for Video Demo

This project is used to control the speed of BLDC motor by employing ZETA converter. The ZETA converter is DC to DC converter, that high voltage dc is applied to the three phase inverter circuit. And control the converter duty cycle the motor speed also varied.

Prototype Model for speed control of BLDC motor by employing ZETA converter

4. BLDC Motor Speed Control By Employing LUO Converter

Click here for Video Demo

This project is used to control the speed of BLDC motor by employing LUO converter. The LUO converter is DC to DC converter, that high voltage dc is applied to the three phase inverter circuit. And control the converter duty cycle the motor speed also varied.

5. BLDC Motor Speed Control By Employing BOOST Converter

This project is used to control the speed of BLDC motor by employing Boost converter. The Boost converter is DC to DC converter, that high voltage dc is applied to the three phase inverter circuit. And control the converter duty cycle the motor speed also varied.

Block Diagram for speed control for BLDC motor by employing Boost Converter

6. BLDC Motor Speed Control By Employing SEPIC Converter

This project is used to control the speed of BLDC motor by employing SEPIC converter. The SEPIC converter is DC to DC converter, that high voltage dc is applied to the three phase inverter circuit. And control the converter duty cycle the motor speed also varied.

Block Diagram For speed control of BLDC motor BY employing SEPIC Converter

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