System for controlling the dissipated power supply of a...

Details System for controlling the dissipated power supply of a... System for controlling the dissipated power supply of a...

2007-02-27

2007-02-27

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

Using semiconductor-type converter

C363S098000

Reexamination Certificate

active

11061107

ABSTRACT:
The invention relates to a system for controlling the power dissipated by a power stage working in mixed Linear/PWM mode, for driving an electromagnetic load, the power stage comprising a power amplifier incorporating a bridge-like circuit, with a half bridge controlled in PWM mode and another half bridge controlled in linear mode, respectively by a converter block and by an error amplifier and wherein the electromagnetic load is crossed by a current and generates an electromotive force, the control system further comprising a first amplifier of a voltage drop, calculated on a sensing resistance of the electromagnetic load, whose output signal is further applied by a second amplifier.Advantageously, according to the invention, the Linear half bridge is controlled directly by an input voltage drawn from an input node outside the current control loop.

REFERENCES:
patent: 5075634 (1991-12-01), French
patent: 6476674 (2002-11-01), Smedegaard-Pedersen et al.

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