Method and circuit for driving a bridge by a PWM procedure

Details Method and circuit for driving a bridge by a PWM procedure Method and circuit for driving a bridge by a PWM procedure

1996-08-30

1999-06-29

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363131, 363 41, H02M 324, H02M 112, H02M 7537

Patent

active

059177209

ABSTRACT:
A circuit for driving a bridge circuit BR having a signal input I1,I2, and a signal output O1-O2, and at least two conduction control signals C1 and C2 by the PWM procedure. The circuit includes a first virtually-square-wave generator CO1 having an output coupled to one of the two control inputs and a second virtually-square-wave generator CO2 having an output coupled to the other of the two control inputs. In this manner, the bridge is driven by two square waves, the null value of the current at the output )O1-O2 no longer constitutes an intrinsic discontinuity and any value, even around zero, is controllable with relative ease.

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