Commutation technique for an AC-to-AC converter based on...

Details Commutation technique for an AC-to-AC converter based on... Commutation technique for an AC-to-AC converter based on...

2007-03-06

2007-03-06

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C388S903000, C363S161000

Reexamination Certificate

active

11202597

ABSTRACT:
A system for controlling a commutation of a load current is provided. The system comprises a AC-to-AC converter that includes a plurality of switching elements, an energy source that provides an oscillating voltage and is connected to the converter, an electrical load connected to the converter, and a controller that controls the converter, and monitors the oscillating voltage and the load current delivered to the electrical load. The controller determines a plurality of machine states of the converter, each of the plurality of machine states representing a corresponding conducting set of the plurality of switching elements, and controls switching between the plurality of machine states based on polarity commutations of the load current in the electrical load and polarity commutations of the oscillating voltage.

REFERENCES:
patent: 3942092 (1976-03-01), Bourbeau et al.
patent: 4792741 (1988-12-01), Matsuo et al.
patent: 5151853 (1992-09-01), Tatara et al.
patent: 6351397 (2002-02-01), Sawa et al.
patent: 6771524 (2004-08-01), Miguchi

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