Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1998-06-26
1999-11-30
Berhane, Adolf Deneke
Electric power conversion systems
Current conversion
Using semiconductor-type converter
H02M 75387
Patent
active
059953993
ABSTRACT:
A power supply control circuit for a DC pump including an oscillating circuit, a frequency dividing circuit, a waveform process circuit, a bridge-type driving circuit, and a driving circuit. The waveform process circuit includes two looped time delay circuits and two NAND gates to separately receive phase-splitting signals produced by the frequency dividing circuit, so as to produce first and second phase signals having phase difference between them. The bridge-type driving circuit includes a bridge-type transistor pair composed of four transistors to separately receive and be driven by the first and second phase signals to generate a driving signal. The driving signal is sent to the driving circuit for the latter to supply working power needed by the pump. Alternatively, the bridge-type driving circuit may be composed of MOS power transistors in which case the phase-splitting signals produced by the frequency dividing circuit are directly used to drive the MOS power transistors and the waveform process circuit is omitted.
REFERENCES:
patent: 4087850 (1978-05-01), Koizumi
patent: 4878163 (1989-10-01), Yamato et al.
patent: 5567997 (1996-10-01), Suzuki et al.
Berhane Adolf Deneke
Liauh W. Wayne
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