Phase-adjusting device for parallel-resonant circuit frequency c

Details Phase-adjusting device for parallel-resonant circuit frequency c Phase-adjusting device for parallel-resonant circuit frequency c

1987-01-09

1987-11-03

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363132, 363136, H02P 1318

Patent

active

047046732

ABSTRACT:
The invention relates to a phase-adjusting device for the inverter, having controllable semiconductors, of a parallel-resonant circuit frequency converter. The phase-adjusting device, operating on the PLL principle, compares a signal derived from the inverter output voltage and a signal delayed by a predetermined amount in relation to the control pulses of the oscillator 1 to a phase-comparing stage. In dependence on the phase comparison of the two signals, the oscillator frequency is so adjusted that the inverter output voltage and the inverter output current are in phase.

REFERENCES:
patent: 4336585 (1982-06-01), Moriarty et al.
patent: 4424557 (1984-01-01), Steigerwald
patent: 4523267 (1985-06-01), Mehl
patent: 4651271 (1987-03-01), Grace

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