Patent ID: 6734646
Filing Date: 2004-05-11
Classification: H02P

Abstract:
A driving circuit for an electronically switched motor, said driving circuit comprising:a supply voltage rectifying stage for providing a rectified supply voltage; first and second control blocks; first switching means for switching state based on at least one output signal of the first control block; magnetic means for providing a magnetic flux according to the state of the first switching means; a plurality of transmission diodes for transmitting an exciting current that flows through the magnetic means; first energy storing means for storing the exciting current flowing through the plurality of diodes; an energy return stage for transferring the energy stored in the first energy storing means to the rectifying stage; second switching means controlled by an output signal of the second control block; first energetic conversion means coupled to the first energy storing means for receiving the energy stored in the first energy storing means by means of the second switching means; and second energetic conversion means coupled between the rectifying stage and the magnetic means, the second energetic conversion means being energetically coupled with the first energetic conversion means.