A two-stage cascaded multilevel inverter
A cascaded multi-level, inverter technology, applied in electrical components, conversion devices of AC power input to DC power output, output power, etc., can solve problems such as low cost, high reliability, voltage spikes, etc. Achieve cost savings, ensure waveform quality, and eliminate voltage spikes
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[0034] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0035] A two-stage cascaded multi-level inverter is formed by connecting a front-stage unit and a rear-stage unit in series, and the front-stage unit is composed of n switch-diode units and an additional spike elimination switch; any A switch-diode unit i (1≤i≤n) connects a DC power supply or a capacitor across two DC buses, and connects a series circuit composed of a switch and a diode in series; the DC of the i-th switch-diode unit The negative terminal of the power supply is connected to the connection point of the switch and the diode of the i+1th switch-diode unit, and the diode in the first switch-diode unit can be omitted; the additional spike elimination switch is connected across the second switch - Between the switch-diode connection point of the diode unit and...
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