Patent ID: 6693813
Filing Date: 2004-02-17
Classification: H02M

Abstract:
A device for quasi-direct pulse-width controlled bidirectional energy conversion, comprising:three phase input voltage systems and three phase output voltage systems connected between a first rail and a second rail, each of the three phase output voltage systems including a half-bridge arm, each half-bridge arm including first and second interruptible power transistors and an in-parallel placed reverse diode, each of the three phase input voltage systems including a half-bridge-like valve arm, each half-bridge-like valve arm including first and second power transistors and an in-parallel placed reverse diode, wherein in each of the three phase input voltage systems a collector of the first power transistor is connected with the first rail, an emitter of the second power transistor is connected with the second rail, an interruptible power transistor is connected with the first and second power transistors, an emitter of the interruptible power transistor is connected with an emitter of the first power transistor and the collector is connected with a collector of the second power transistor, two series connected reverse diodes are connected in parallel to the interruptible power transistor, and the three phase input voltage system is connected with a node of the series connected reverse diodes.