Patent ID: 9054630
Filing Date: 2015-06-09
Classification: H02P

Abstract:
1. A synchronous machine controller comprising: a position detecting unit that detects a position of a rotor of a synchronous machine including the rotor in which a field magnet is formed of a permanent magnet or a position estimating unit that estimates the position of the rotor; a current detecting unit that detects an armature current of the synchronous machine; a current command generating unit that generates first and second current commands transformed to an orthogonal two-axis coordinate system on the basis of a torque command; a voltage command generating unit that generates a voltage command on the basis of the first and second current commands, the position of the rotor, and the armature current; a power converting unit that outputs a voltage to the synchronous machine on the basis of the voltage command; a magnetic flux estimating unit that estimates an armature interlinkage flux of the synchronous machine on the basis of a rotational velocity of the synchronous machine calculated from a variation of the position of the rotor, the voltage command, and the armature current; and a magnet state estimating unit that estimates a magnetic flux or a temperature of the permanent magnet from the position of the rotor, the armature current, and the armature interlinkage flux.