Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter
Patent
1988-10-12
1990-05-29
Beha, Jr., William H.
Electric power conversion systems
Frequency conversion without intermediate conversion to d.c.
By semiconductor converter
318729, 323207, 323212, G05F 170
Patent
active
049300644
ABSTRACT:
A high frequency link power converter apparatus includes a power source, a circulating current type AC-AC converter having an output terminal connected to the power source, a high frequency phase-advancing capacitor connected to an input terminal of the AC-AC converter, a phase controller for controlling a firing phase of the AC-AC converter, an external oscillator for supplying phase reference signals to the phase controller, a first circuit for controlling a crest value of voltages applied to the phase-advancing capacitor, a second circuit for detecting a phase difference between the reference signals and the voltages applied to the phase-advancing capacitor, and a third circuit for controlling the phase difference, so that the magnitude of the phase difference becomes substantially zero.
REFERENCES:
patent: 4418380 (1983-11-01), Tanaka et al.
patent: 4529925 (1985-07-01), Tanaka et al.
patent: 4570214 (1986-02-01), Tanaka
patent: 4760321 (1988-07-01), Tanaka et al.
patent: 4812669 (1989-03-01), Takeda et al.
Miura Kazutoshi
Tanaka Shigeru
Beha Jr. William H.
Kabushiki Kaisha Toshiba
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