A New Modulation Method Based on Current Hysteresis Control for Cascaded H-Bridge Inverter

Abstract:

This paper puts forward a current hysteresis control method suitable for cascaded H-bridge inverter. It has the following characteristics : The control method is similar to unipolar SPWM modulation for a single H bridge.It is simple for pulse generator and can effectively reduce the switching losses; The phase-shifted control pulse for multi H bridges of a phase with current hysteresis control can be generated which is similar to the phase shift SPWM by dynamically adjusting the width of hysteresis to keep power device switching frequency constant; It retains fast response, internal current limiting and with good stability for current hysteresis control.At last, the experimental results verify the correctness of the proposed method.

• Periodical: Advanced Materials Research (Volumes 588-589)
• Pages: 393-396
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.588-589.393
• Online since: November 2012
• Authors: Min Sheng Yang, Si Guo Zhu
• Keywords: Current Hysteresis Control, Phase Shift SPWM, Switching Loss, Unipolar

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