Switching control apparatus and method of two-phase switched reluctance motor

摘要

Disclosed herein are a switching control apparatus and method of a two-phase switched reluctance motor. The witching control apparatus includes: a rectifying unit rectifying commercial power; and an active converter including a pair of common switches commonly connected to two phase windings of the two-phase SRM, a pair of first phase switches bridge-connected to the pair of common switches at any one of the two phase windings, a pair of second phase switches bridged-connected to the pair of common switches at the other of the two phase windings and connected in series with each other, and a plurality of current feedback diodes each connected to the switches and operated in operation modes 1 to 3 to drive the two-phase SMR.

主权项

1. A switching control apparatus of a two-phase switched reluctance motor, comprising:
a rectifying unit rectifying commercial power; and an active converter including a pair of common switches having two phase windings of the two-phase SRM commonly connected to a contact therebetween, a first phase switch and a first current feedback diode bridge-connected to the pair of common switches at any one of the two phase windings and connected in series with each other, a second phase switch and a second current feedback diode bridged-connected to the pair of common switches at the other of the two phase windings and connected in series with each other, and a plurality of current feedback diodes each connected to the switches and operated in a plurality of operation modes to supply the power provided from the rectifying unit to the two-phase SRM, thereby driving the two-phase SMR; wherein: the active converter is configured to be changed from a first operation mode, in which a voltage is applied to at least one of said windings to excite one of said windings, to a second operation mode, in which residual current is circulated in said one of said windings, according to a predetermined scheme; and said predetermined scheme comprises one of: controlling the active converter in the first operation mode to excite said one of said windings, switching from said first mode to said second mode and controlling the active converter in the second operation mode until current induced to said one of said windings is converged to zero; and controlling the active converter in the first operation mode for a first time period, then switching from the first operation mode to the second operation mode for a second time period, then switching from the second operation mode to the first operation mode for a third time period, said third time period being shorter than said first time period, the switching from said first operation mode to the second operation mode for a fourth time period, said fourth time period being longer than said second time period.