Patent ID: 8576581
Filing Date: 2013-11-05
Classification: H02M

Abstract:
1. A circuit for controlling a current in an electrical control member or a voltage across terminals of said electrical control member, said circuit comprising: a bridge provided with four terminals and comprising four control switches; a first power source for said bridge; and means of controlling at least two of said four switches by pulse width modulation, wherein said power source is connected between a first terminal and a second terminal of said bridge, wherein said electrical control member is connected between a third terminal and a fourth terminal of said bridge, wherein the first switch is connected between said first terminal and said third terminal of said bridge, wherein the second switch is connected between said first terminal and said fourth terminal of said bridge, wherein the third switch is connected between said third terminal and said second terminal of said bridge, wherein the fourth switch is connected between said fourth terminal and said second terminal of said bridge, and wherein the circuit for controlling the current or the voltage comprises: wherein said means of controlling the at least two switches by pulse width modulation authorizes: