(3N+3) switched cascaded based multi-port energy-feedback high-voltage converter and control method thereof
An energy-feedback, multi-port technology, applied in the control system, control/regulation system, AC motor control, etc., can solve unknown problems, reduce equipment volume, improve energy utilization efficiency, and reduce feedback grid pressure Effect
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[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments.
[0038] The multi-port energy-fed high-voltage converter of the present invention is composed of basic units based on 3N+3 switch inverters in cascade connection. In the text, "basic units based on 3N+3 switch inverters" are abbreviated as "3N+3 switch units" ", the "basic unit based on nine-switch inverter" is abbreviated as "nine-switch unit".
[0039] The following will take the cascade connection of 6 3N+3 switch units as an example to further illustrate the topology of the multi-port energy-fed high-voltage converter of the present invention. see figure 1 The 3N+3 switching unit is composed of a three-phase bridge PWM rectifier, a DC side capacitor, and a 3N+3 switching inverter, and the 3N+3 switching inverter forms N groups of three-phase outpu...
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