Ultra-high voltage bidirectional power conversion circuit, power module and loop control method

Abstract

The present application provides an ultra-high voltage bidirectional power conversion circuit, a power supply module and a loop control method, wherein the bidirectional power change circuit includes: a first bidirectional voltage source and a second bidirectional voltage source on the upper path; a bidirectional DC / DC isolation conversion circuit and a bidirectional DC / DC isolation conversion circuit on the lower path; a first series-parallel switching switch and a second series-parallel switching switch, which are used to set the connection relationship between the two bidirectional DC / DC isolation change circuits to series or parallel, and when the series-parallel switches are switched, the first upper path filter capacitor, the first lower path filter capacitor, the second upper path filter capacitor and the second lower path filter capacitor remain unchanged through the first voltage balancing circuit and the second voltage balancing circuit. The bidirectional power change circuit can achieve ultra-high voltage processing capability and ultra-wide voltage range conversion capability, while reducing the cost of power supply devices and improving the conversion efficiency of the power module.

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