Circuit device for preventing saturation of the transformer in a

Details Circuit device for preventing saturation of the transformer in a Circuit device for preventing saturation of the transformer in a

1993-06-23

1994-10-11

Stephan, Steven L.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 98, H02M 324

Patent

active

053552997

ABSTRACT:
A DC/AC converter is disclosed which has an inverter coupled to a load via a transformer. A control signal generator causes the inverter to switch according to a predetermined procedure, and a feedback loop is responsive to at least one state quantity of the circuit to act on the control signal generator and modify the state quantities so as to ensure a predetermined stable pattern for the output AC voltage. To prevent the transformer from becoming saturated, a circuit device is provided which includes correcting means effective to sense in the inverter output voltage an unbalance causing the appearance of a DC component at the primary of the transformer and to apply a correction signal to the control signal generator for so modifying the switch signals as to cancel the unbalance.

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Carpita et al., "Power Conditioning System Using Sliding Mode Control", pp. 626-633, 1988, PESC '88 Record, Apr., vol. 2.

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