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Control of PM brushless DC motor drives

Control of PM brushless DC motor drives

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Because of the simplicity in construction and in control, BLDCMs are found in a wide range of applications. This kind of motor suffers, however, a serious drawback in the torque ripple, due to sharp communications every 60° electrical. Various efforts have been made to reduce the torque ripple. Phase advance approach is a common practice for controlling the motors above the base speed. The working principle of the motor has been illustrated using the motor and electronics commutator association, in accordance with Hall -effect sensors sequences. The mathematical modeling of the motor has been carried out. The practical block diagram of three-phase motor has been built for the simulation purpose. Control of the BLDC drive was performed in MATLAB/Simulink environment and the analysis of torque ripples has been provided.

Chapter Contents:

  • 7.1 Introduction
  • 7.1.1 Construction of BLDC motor
  • 7.1.2 Operation principle of BLDC motor
  • 7.1.3 Specific features of BLDC motor drives
  • 7.2 Modeling of brushless DC motor
  • 7.2.1 Dynamic model
  • 7.2.2 Block diagram of BLDCM model
  • 7.2.3 Torque-speed characteristic
  • 7.3 Phase-current control of brushless DC motor
  • 7.3.1 Control system configuration
  • 7.3.2 Simulation results
  • 7.4 Torque ripple analysis and reduction techniques
  • 7.5 Pseudo-vector control of BLDC motor
  • 7.5.1 System configuration
  • 7.5.2 Principle of pseudo-vector control
  • 7.5.3 Simulation results and performance comparison
  • 7.6 Control of BLDCM in high-speed region
  • 7.6.1 Operation in high-speed region
  • 7.6.2 Phase-advance approach to expand the speed range of BLDCM
  • 7.6.3 Pseudo-vector control for high-speed range of BLDCM
  • 7.6.4 Simulation results for high-speed operation using PVC
  • 7.7 Summary
  • List of symbols
  • Glossary of terms
  • References

Inspec keywords: DC motor drives; machine control; machine theory; permanent magnet motors; Hall effect transducers; mathematical analysis; commutators; brushless DC motors

Other keywords: Hall-effect sensors; torque ripple reduction; phase advance approach; electronics commutator association; MATLAB-Simulink environment; three-phase motor control; mathematical modeling; PM brushless DC motor drives; BLDCM drive

Subjects: Mathematical analysis; Control of electric power systems; Electric transducers and sensing devices; d.c. machines; Sensing devices and transducers; Mathematical analysis; Drives; Bulk effect devices

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