Resonant power converter

Details Resonant power converter Resonant power converter

1998-11-27

2000-07-18

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 40, 363132, H02M 744, H02M 7521

Patent

active

06091615&

ABSTRACT:
A resonant power converter includes a positive bus line (1A) and a negative bus line (1B). A power converting portion (2) connected between a DC power source (1) and a load (5) operates for implementing power conversion. The power converting portion includes a plurality of main switching devices (3a-3f) connected in series and provided between the positive bus line and the negative bus line, and a plurality of flywheel diodes (4a-4f) connected in antiparallel with the main switching devices respectively for each phase. A resonant circuit (8) connected between the positive bus line and the negative bus line includes a resonant capacitor (6) and a resonant reactor (7) connected in series with the resonant capacitor. A control device (13) operates for switching the main switching devices in accordance with a predetermined pattern to enable the power converting portion to implement power conversion. The control device turns on a first switching device among the main switching devices to start resonance to be implemented by the resonant capacitor and the resonant reactor. The control means turns off a second switching device among the main switching devices when a resonant current caused by the resonance is greater than a load current and hence a current flows through one of the flywheel diodes which is connected in antiparallel with the second switching device.

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Chen et al: "A Passively Clamped Quasi Resonant DC Link Inverter" IEEE, 1994, pp. 841-848.

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