Motor exciting device and motor exciting method and motor control device and motor control method

摘要

A motor control device which can determine a magnetic pole position for a magnetic pole position detector included in a permanent magnet motor in which the reluctance torque proportion is larger than the magnet torque proportion is provided. In a permanent magnet synchronous motor having multi-phase windings of N axes (N≧2), the windings of optionally selected K axes (K≦N) are DC excited using corresponding independent power supplies.

主权项

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.