Papers by Author: Zheng Lu

Abstract: To solve the problem of computational complexity in H bridge cascaded multilevel inverter (HBCMI) control, this paper proposes a simple space vector pulse width modulation control algorithm. Base on the topology configuration of HBCMI, the output voltage is deduced, which is the difference value between two-level inverter group output voltage formed by left bridge arms and by right bridge arms. The control complexity is independent of inverter voltage level and it is suitable to every voltage level. To verify the algorithms, different level cascaded H-bridge inverter drive systems were constructed and simulation results are present.

Abstract: Hysteresis current control can control the current’s changing by changing the state of the inverter’s switches, in order to realize to tail the given current quickly for actual current. Theory and experimentation of changing ring width constant single-polar hysteresis current control of the cascade inverter are proposed. In the last, the simulation and the output waveforms are given.