Switching control apparatus for two phase switched reluctance motor and method thereof

摘要

Disclosed herein are a switching control apparatus for a two phase switch reluctance motor and a control method using the same. The switching control apparatus includes a rectifier; and an active converter including a pair of common switches, a pair of first phase switches, a pair of serially connected second phase switches, a plurality of current feedback diodes each connected to the switches, and a pair of drivers controlling the switches and operated as operation modes 1 to 3 to provide the commercial power provided from the rectifier to the two phase SRM and drive the two phase SRMs.

主权项

1. A switching control apparatus for a two phase switch reluctance motor (SRM), comprising:
a rectifier rectifying commercial power; and an active converter including a pair of common switches having two phase windings of two phase SRMs commonly connected to a contact therebetween, a pair of serially connected first phase switches bridge-connected to the pair of common switches at any one of the two phase windings, a pair of serially connected second phase switches bridge-connected to the pair of common switches at the other one of the two phase windings, a plurality of current feedback diodes each connected to the switches, and a pair of drivers controlling the switches and operated as operation modes 1 to 3 to provide the commercial power provided from the rectifier to the two phase SRM and drive the two phase SRMs, wherein the operation mode 1 applies positive reference voltage to the corresponding phase winding of the two phase SRM to increase current flowing in the winding, the operation mode 2 circulates current to the winding when current flows in the winding to slowly reduce current, and the operation mode 3 applies negative reference voltage to the phase winding to rapidly reduce current, and wherein for the active converter, one of the common switches maintains a turn-on state for a predetermined time and one of the first phase switches is changed from a turn-on state to a turn-off state and again to a turn-on state during the period to change the operation mode from the operation mode 1 to the operation mode 2 and again to the operation mode 1 to apply the reference voltage to one of the phase windings, thereby exciting the one of the phase windings.