Patent ID: 9088193
Filing Date: 2015-07-21
Classification: H02P

Abstract:
1. A motor exciting device for selecting a plurality of optional axes of a permanent magnet synchronous motor having multiple-phase windings of as many as N axes (N≧2) and positionally relating an encoder and a magnetic pole position of the motor by independently exciting the windings of each of the selected plurality of axes, the motor exciting device comprising: an exciting current command unit which generates exciting current commands for the selected plurality of axes totaling K sets (K≦N); exciting devices for individual axes which receive the exciting current commands and supply DC exciting currents to the windings of the K sets of axes; and a storage unit which stores an encoder value, wherein the exciting devices for individual axes DC-excite the windings of the K sets of axes based on the exciting current commands such that the magnetomotive forces of the windings of the K sets of axes are shifted in phase from one another by π/K, and wherein an encoder value collected when the motor is stably stopped by the DC excitation is stored in the storage unit as an initial position.