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Four-level hybrid-clamped (4L-HC) converter is a newly proposed topology which is suitable for high-performance medium-voltage drives. Zero-sequence voltage (ZSV) is commonly used to balance the DC-link capacitor voltages of this topology and then the common-mode voltage (CMV) is also affected. This paper proposes a CMV reduction method for a back-to-back 4L-HC converter. The relationship of CMV and...
In this paper a new five-level hybrid-clamped converter with reduced number of clamping devices is introduced. Only two active switches and two flying capacitors are used for clamping per phase. The operating method is introduced and phase-shifted pulse width modulation (PS-PWM) is used to control this converter. A detailed analysis of the average currents through the flying capacitors and neutral...
As the society pursuing for a more efficient way of using energy, the technology of multilevel converter, which aims at the field of large-power high-voltage, has been widely studied. In this paper, a newly released single phase hybrid-clamped five-level inverter has been extended to three phases. The characteristics of this topology and the switching states have been analyzed. To solve the voltage...
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