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1. (WO2017150989) ELECTRICAL INVERTER ASSEMBLY

Pub. No.:    WO/2017/150989    International Application No.:    PCT/NZ2017/050020
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Mar 01 00:59:59 CET 2017
IPC: H02M 7/00
H02M 7/483
H02M 7/537
H02M 3/18
H02M 9/04
Applicants: UNIVERSITY OF WAIKATO
Inventors: KULARATNA, Nihal
Title: ELECTRICAL INVERTER ASSEMBLY
Abstract:
In one aspect the invention provides an electrical inverter assembly arranged to connect to a direct current electrical supply and configured to supply alternating current to at least one electrical load. This inverter assembly includes at least one pair of inverters, being a primary inverter and a secondary inverter, where each inverter has a set of input terminals and output terminals. The invention also includes at least two banks of energy storage capacitors provided in association with each pair of primary and secondary inverters, and a capacitor switching structure associated with each pair of inverters. This capacitor switching structure is arranged to cyclically connect a discharged energy storage capacitor bank in series with the input terminals of the primary inverter and the direct current electrical supply to charge the capacitor bank, and to concurrently connect a charged energy storage capacitor bank with the input terminals of the secondary inverter to discharge the capacitor bank.