Patent ID: 6054819
Filing Date: 2000-04-25
Classification: H02P

Abstract:
A driving circuit for controlling the flow of current in a switched reluctance (SR) machine, comprising:first and second phase windings each having first and second terminals with the first terminal of the phase windings being connected together at a common node;first switch means having a first electrode for connection to a first DC potential, a second electrode for connection to the common node, and a control electrode for controlling the turning on and off of the first switch means;second switch means having a first electrode for connection to the first DC potential, a second electrode for connection to the second terminal of the first phase winding and a control electrode for controlling the turning on and off of the second switch means;third switch means having a first electrode for connection to the common node, a second electrode connected to a second DC potential, and a control electrode for controlling the turning on and off of the third switch means;fourth switch means having a first electrode for connection to the second terminal of the second phase winding, a second electrode for connection to the second DC potential, and a control electrode for controlling the turning on and off of the fourth switch means;a first diode having a first terminal for connection to the second DC potential, and a second terminal for connection to the second terminal of the first phase winding; anda second diode having a first terminal for connection to the second terminal of the second phase winding, and a second terminal for connection to the first DC potential.