Input output balanced bidirectional buck-boost converters and associated systems and methods

摘要

Various embodiments of the present invention relate to an input output balanced bidirectional buck-boost converter and associated system and method. In one example, a DC/DC bidirectional buck-boost power converter has both input and output voltages centered around chassis. This converter allows for overlapping input and output voltages, and allows for use of offset based leakage fault detection.

主权项

1. A bidirectional buck-boost converter, comprising:
a first inverter, the first inverter comprising a first inverter positive DC terminal, a first inverter negative DC terminal, a first inverter phase one AC terminal, a first inverter phase two AC terminal and a first inverter phase three AC terminal; a second inverter, the second inverter comprising a second inverter positive DC terminal, a second inverter negative DC terminal, a second inverter phase one AC terminal, a second inverter phase two AC terminal and a second inverter phase three AC terminal; a phase one inductor wound on a phase one inductor core, the phase one inductor being configured to electrically connect the first inverter phase one AC terminal with the second inverter phase one AC terminal; a phase two inductor wound on a phase two inductor core, the phase two inductor being configured to electrically connect the first inverter phase two AC terminal with the second inverter phase two AC terminal; a phase three inductor wound on a phase three inductor core, the phase three inductor being configured to electrically connect the first inverter phase three AC terminal with the second inverter phase three AC terminal; a positive side DC capacitor configured to electrically connect the positive DC terminal of the first inverter to the positive DC terminal of the second inverter; and a negative side DC capacitor configured to electrically connect the negative DC terminal of the first inverter to the negative DC terminal of the second inverter; wherein each of the phase one inductor core, the phase two inductor core and the phase three inductor core are independent cores.