Shutdown wave sealing control method and application device of multi-level inverter circuit
A multi-level inverter and control method technology, applied in emergency protection circuit devices, output power conversion devices, irreversible DC power input conversion to AC power output, etc., can solve overvoltage, no clamping path, etc. question
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[0047] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0048] exist Figure 1aIn the shown ANPC topology, the AC side AC can theoretically output three states: Udc+, NP, and Udc-, which are represented by 1 state, 0 state, and -1 state respectively. Among them, in the 1 state, the switching tubes T3 and T4 are connected in series and bear the total bus voltage, and in the -1 state, the switching tubes T1 and T2 are connected in series and bear the total bus voltage. During normal operation, at least one clamping tube (T5, D5 and T6, D6) will be...
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