Paralleling of inverters for low harmonics

Details Paralleling of inverters for low harmonics Paralleling of inverters for low harmonics

H - Electricity

02

M

321/45

H02M 7/515 (2006.01) H02M 7/48 (2006.01)

Patent

CA 1041169

ABSTRACT OF THE DISCLOSURE Two switching-type three-phase inverters are connected to supply electrical power to a common load in such a way that the load voltage has lower harmonic content than that of either inverter alone. Harmonic content is reduced by interconnecting the inverters by means of transformers to cancel some of the harmonic voltages, but a main component of output power of one of the inverters is used directly without being trans- formed, so that the total required KVA of the transformers is relatively small. Each phase of load voltage is produced from four or six component phasors, by adding two or three voltages from one of the inverters and two or three voltages from the other.

251719

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