Single-phase to three phase converter AC motor drive

摘要

Methods and systems for power conversion. An energy storage capacitor is contained within an H-bridge subcircuit which allows the capacitor to be connected to the link inductor of a Universal Power Converter with reversible polarity. This provides a “pseudo-phase” drive capability which expands the capabilities of the converter to compensate for zero-crossings in a single-phase power supply. Conversion between, e.g., single phase and three phase power is enabled, in either direction, without sacrificing workload performance.

主权项

1. A power converter for powering an application requiring both single phase and three phase power, comprising:
first and second single phase power portals and a three phase power portal; a first power module, comprising:
a first energy-transfer reactance; andfirst and second bridge switch arrays interposed between said reactance, and said single phase power portals, respectively, and each comprising one bidirectional switching device for each port of said single phase power portals; and a second power module, comprising:
a second energy-transfer reactance;third and fourth bridge switch arrays interposed between said reactance, and said second single phase and three phase power portals, respectively, and each comprising one bidirectional switching device for each port of said second single phase and three phase power portals; andan energy storage capacitor, reversibly connected across said second reactance through a full-bridge configuration.