Synchronous machine control apparatus

摘要

A control command generator that generates an armature interlinkage flux command and a torque current command by a torque command, a rotation speed, and an operation target command, includes a first flux command generator generating a first flux command by the toque command or the torque current command, a second flux generator generating a second flux command by the torque command or the torque current command and the rotation speed of the synchronous machine, a command allocation setting unit setting an allocation coefficient equivalent to an allocation ratio of the two first and second flux commands by the operation target command, a flux command adjuster outputting an armature interlinkage flux command by the two flux commands and the allocation coefficient, and a torque current command generator generating the torque current command by the torque command and the armature interlinkage flux command.

主权项

1. A synchronous machine control apparatus that controls an armature current of a synchronous machine on two axes including a γ axis in a generation direction of an armature interlinkage flux of the synchronous machine and a δ axis orthogonal to the γ axis, comprising:
a voltage command generator that generates a voltage command according to a magnetizing current command as a current command in the γ-axis direction and a torque current command as a current command in the δ-axis direction; a power converter that converts a voltage across a power supply and applies the resulting voltage to the synchronous machine according to the voltage command; a current detector that detects the armature current of the synchronous machine; a position detector that makes one of an estimation and a detection of a rotor position of the synchronous machine; a speed computing unit that computes a rotation speed of the synchronous machine on the basis of the rotor position; a flux computing unit that estimates an estimated armature interlinkage flux of the synchronous machine on the basis of the armature current and the voltage command; a magnetizing current command generator that generates the magnetizing current command on the basis of a difference between an armature interlinkage flux command and the estimated armature interlinkage flux; and a control command generator that generates the armature interlinkage flux command and the torque current command according to a torque command, the rotation speed, and an operation target command, wherein the control command generator includes: a first flux command generator that generates a first flux command according to one of the torque command and the torque current command; a second flux command generator that generates a second flux command according to one of the torque command and the torque current command, and the rotation speed; a command allocation setting unit that sets an allocation coefficient equivalent to an allocation ratio of two flux commands including the first flux command and the second flux command according to the operation target command; a flux command adjuster that outputs the armature interlinkage flux command according to the two flux commands and the allocation coefficient; and a torque current command generator that generates the torque current command according to the torque command and the armature interlinkage flux command.