Hysteresis Injection Current Control with Constant Frequency for the Third-Harmonic Current Injection Two-Stage Matrix Converter

Compared with the conventional matrix converter, third-harmonic current injection two-stage matrix converter (3TSMC) has higher efficiency and voltage transfer ratio. The sinusoidal mains currents of 3TSMC are obtained by third harmonic current injection. Generally, a PI regulator is adopted in the current control loop, leading to the control error and mains currents distortion. Therefore, this manuscript presented a hysteresis band control method for the current injection circuit with constant switching frequency. The proposed method remains the benefit of hysteresis control and tackles the drawback having variable switching frequency. All theoretical considerations are verified by Simulation results.