Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1986-11-21
1988-05-03
Wong, Peter S.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 89, 363127, 363131, 363134, 363 56, H02P 1318
Patent
active
047424419
ABSTRACT:
A high-frequency switching power conversion circuit is disclosed. The circuit is capable of operating either as an inverter or as a rectifier, by the use of an array of high-power, bidirectional switches. AC waveforms are produced by ROM-based pulse width modulation, the clocking of which may be phase-locked to an active AC load. Analog voltage sense circuitry detects high or low output voltage and alters the base address in ROM to a lower or higher duty cycle waveform, respectively, providing digital regulation of the output. Overcurrent protection circuitry, responsive to an inductive load, alters the pulse width modulation pattern to produce a dynamically clamped output dependent upon high-power, variable frequency loads. No-load detection circuitry drastically reduces the duty cycle on the switching elements, thus conserving energy when not needed.
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Heart Interface Corporation
Wong Peter S.
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