Inverter output circuit

Details Inverter output circuit Inverter output circuit

1996-11-27

1998-02-03

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 56, 363 98, 363132, 363 17, H02M 112

Patent

active

057151504

ABSTRACT:
In an inverter power supply with an output transformer including a core of magnetically permeable material with an effective area, a primary winding on the core and a secondary output winding on the core; a pulse width modulator with a first output polarity and a second output polarity for alternately creating a first gate signal during the first output polarity and a second gate signal during the second output polarity; and, means for controlling the duration of said first and second gate signals to control the alternating output current at the secondary output winding, the improvement comprising: operating the core in quadrants I and III of the B-H graph by controlling its effective area of the core and including sensing means for creating a control signal indicative of impending saturation of the core during either one of the first and second gate signals and protection means for terminating the one gate signal in response to the control signal, while allowing the pulse width modulator to create next output polarity.

REFERENCES:
patent: 4897773 (1990-01-01), Bilczo
patent: 5206800 (1993-04-01), Smith

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