Method of operating a three-step inverter

Details Method of operating a three-step inverter Method of operating a three-step inverter

1989-08-30

1990-08-28

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 96, 363136, 363 58, 318801, H02M 7515

Patent

active

049530690

ABSTRACT:
A method of operating a three-step inverter that supplies a polyphase machine whose electric output variables are formed by scanning two zero-shifted setpoint signal sets with triangular modulation signal, in a space vector representation using double modulation. A first or second interval value is formed between the maximum or minimum value of phase signal waveforms of the setpoint signal sets and an upper or lower scanning limit. The first and second interval values are added or subtracted from the phase signal waveforms of the first and second setpoint signal sets, to thereby increase the linear control range of the inverter and reduce the harmonic spectrum in the inverter output signals.

REFERENCES:
patent: 4286317 (1981-08-01), Kommissari
patent: 4386396 (1983-05-01), Anquist
patent: 4536816 (1985-08-01), Matsumura et al.
patent: 4855893 (1989-08-01), Kratz

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