Three Phase Inverter for BLDC Motor Drive

Three Phase Inverter for BLDC Motor Drive

Introduction

Brushless DC Motor or the BLDC Motor is a rotating electric motor consisting of stator armature windings and rotor permanent magnets whereas in a conventional brushed DC motor the stator is made up of permanent magnets and rotor consists of armature windings. The conventional DC motor commutes itself with the use of a mechanical commutator whereas brushless DC motor needs electronic commutation for the direction control of current through the windings

Three Phase Inverter for BLDC Motor Drive

Industries using three phase devices like induction motors suffer a lot from the menace of power instability and have invested a lot in alternative means like the power generators which has many disadvantages like noise and other forms of pollution. The main objective of this project is to haveIndustries using three phase devices like induction motors suffer a lot from the menace of power instability and have invested a lot in alternative means like the power generators which has many disadvantages like noise and other forms of pollution. The main objective of this project is to have A system designed to  design  three phase inverter to control the BLDC motor using MOSFET drivers

Block Diagram:

Three Phase Inverter for BLDC Motor Drive Block

Description:

BLDC Motor

Brushless DC Motor or the BLDC Motor is a rotating electric motor consisting of stator armature windings and rotor permanent magnets whereas in a conventional brushed DC motor the stator is made up of permanent magnets and rotor consists of armature windings. The conventional DC motor commutes itself with the use of a mechanical commutator whereas brushless DC motor needs electronic commutation for the direction control of current through the windings. Typically BLDC motors have three phase windings that are wound in star or delta fashion and need a three phase inverter bridge for the electronic commutation.

Closed Loop Speed Control

In closed loop speed control, the set speed and the actual speed are compared and the error is fed to the PI controller, which finally outputs the required duty cycle in order to achieve the required speed operation of the motor.

Microcontroller

FREESCALE  Controller

Oscillator (XTAL, EXTAL)

8-Bit HCS08 Central Processor Unit (CPU)

  • 40-MHz HCS08 CPU (central processor unit)
  • 20-MHz internal bus frequency
  • HC08 instruction set with added BGND instruction
  • Background debugging system
  • Breakpoint capability to allow single breakpoint setting during in-circuit debugging (plus two more breakpoints in on-chip debug module)
  • Debug module containing two comparators and nine trigger modes. Eight deep FIFO for storing change-of-flow addresses and event-only data. Debug module supports both tag and force breakpoints.

Component used

  • Free Scale Controller – 500
  • Mosfets – 150
  • 7805 – 12
  • 1000 mf – 15
  • LCD – 150

 

 

 

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