Phase separation control

Details Phase separation control Phase separation control

1988-12-16

1989-10-17

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 98, 363132, 363160, H02M 112

Patent

active

048751499

ABSTRACT:
Polyphase inverters for converting AC power into polyphase AC output power typically experience phase shifts due to unbalanced phase loading. The resulting phase error is undesirable and should be eliminated, if possible. In order to overcome the foregoing problem, a control for maintaining N-1 phase outputs at desired angular displacements relative to a reference phase output determines the angular deviation of each of the N-1 phase outputs from the desired angular displacement for such phase output and adjusts a control waveform in time for each of a number of switches based upon the angular deviation of the phase output produced by such switch so that the angular deviations are minimized.

REFERENCES:
patent: 4156275 (1979-05-01), Loberg
patent: 4218732 (1980-08-01), Lafuze
patent: 4546422 (1985-10-01), Okado

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