Self-oscillating high frequency power converter

Details Self-oscillating high frequency power converter Self-oscillating high frequency power converter

1985-03-11

1986-08-12

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 40, 363 75, 363 97, 363131, 323248, H02M 3338

Patent

active

046059997

ABSTRACT:
A self-oscillating power converter utilizes a MOSFET power transistor switch with its output electrode coupled to a tuned network that operatively limits the voltage waveform across the power switch to periodic unipolar pulses. The transistor switch may be operated at a high radio frequency so that its drain to gate interelectrode capacitance is sufficient to comprise the sole oscillatory sustaining feedback path of the converter. A reactive network which is inductive at the operating frequency couples the gate to source electrodes of the transistor switch and includes a variable capacitance as a means of adjusting the overall reactance, and hence the converter's switching frequency in order to provide voltage regulation. A resonant rectifier includes a tuned circuit to shape the voltage waveform across the rectifying diodes as a time inverse of the power switch waveform.

REFERENCES:
patent: 3875493 (1975-04-01), Kunzinger et al.
patent: 4449174 (1984-05-01), Ziesse
Richard Myers and Robert D. Peck, "200-KHz Power FET Technology in New Modular Power Supplies", Hewlett Packard Journal, pp. 3-7, 8/1981.

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