Torque and current pulsation suppression method based on harmonic compensation for PMSM drive system under...

Area of Science:

• Electrical Engineering
• Power Electronics
• Control Systems

Background:

• Single-phase rectifiers generate DC-link voltage fluctuations, leading to motor torque and current pulsations (TACP).
• Traditional solutions like LC filters are bulky, while conventional suppression algorithms offer limited performance.
• Need for lightweight and effective TACP suppression methods in motor drives.

Purpose of the Study:

• To propose and validate a novel TACP suppression (TACPS) method based on harmonic compensation for single-phase rectifier systems.
• To analyze the stability and dynamic performance of the proposed TACPS method using a linear time-invariant (LTI) model.
• To demonstrate the effectiveness of the proposed TACPS method through experimental verification.

Main Methods:

• A TACP suppression (TACPS) method is proposed, involving the injection of specific harmonics into the stator voltage.
• A linear time-invariant (LTI) model is utilized to analyze the system's stability and dynamic performance.
• Extensive experimental tests are performed to validate the proposed method's effectiveness.

Main Results:

• The proposed harmonic compensation method effectively suppresses TACP in the motor.
• Satisfactory suppression performance is achieved while maintaining system stability and dynamic characteristics.
• Experimental results confirm the significant reduction in torque and current pulsations.

Conclusions:

• The proposed TACPS method offers an effective and lightweight solution for mitigating motor pulsations in single-phase rectifier systems.
• Harmonic compensation provides a superior alternative to conventional methods for TACP suppression.
• The study validates the practical applicability and effectiveness of the proposed method.