Patent ID: 7382065
Filing Date: 2008-06-03
Classification: F02D,H01F,H02M,Y02B

Abstract:
1. A control circuit for controlling an inductive load, in particular an electro actuator, comprising a (first) source of dc voltage, a first electronic switch interposed between a first terminal of the voltage source and the corresponding first terminal of the load, a second electronic switch interposed in series between the other or second terminal of the load and the other or second terminal of the said source, a current recirculation arrangement including a diode connected between the first terminal of the load and the other or second terminal of the voltage source to allow circulation of current in the load when the first switch is open, and a control unit arranged to render the second switch conductive when and as long as the load is to be controlled; the recirculation arrangement including said second electronic switch, and a third electronic switch disposed between the first terminal of the load and the other or second terminal of the voltage source in parallel to the load and the second electronic switch, and the control unit being arranged to control the third switch in a synchronous manner, but in phase opposition, in relation to the first switch.