Synchronous machine control apparatus
AssigneeMitsubishi Electric Corporation
InventorsTakahiko Kobayashi, Kiyoharu Anzai, Noriyuki Wada, Daiki Matsuura
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Abstract
A synchronous machine control apparatus is characterized by including a magnet condition estimation unit (7, 7a) that estimates the temperature or the magnetic flux of a permanent magnet that forms the magnetic field of a synchronous machine (1), and is characterized in that the magnet condition estimation unit (7, 7a) coordinate-converts an armature current into currents on the γ-δ axis consisting of the γ axis and the δ axis that is perpendicular to the γ axis, based on the rotor position and the estimated γ axis, and estimates the temperature or the magnetic flux of the permanent magnet, based on the control command for the synchronous machine (1) and the γ-δ axis currents.
Claims11
A synchronous machine control apparatus comprising:
- an electric-power conversion unit that outputs a voltage to a synchronous machine having a permanent magnet for forming a magnetic field, based on a voltage command;
- a current detection unit that detects an armature current of the synchronous machine;
- a voltage command calculation unit that calculates the voltage command, based on a control command;
- a position detection unit that estimates or detects a rotor position of the synchronous machine;
- a magnetic flux estimation device that estimates a γ axis in which a total armature-interlinked magnetic flux of the synchronous machine is generated, based on at least one of the armature current and the voltage command;
- and
- a magnet condition estimation unit that estimates a temperature and a magnetic flux of the permanent magnet, wherein the magnet condition estimation unit coordinate-converts the armature current into currents on a γ-δ axis consisting of the γ axis and a δ axis that is perpendicular to the γ axis, based on the rotor position and the estimated γ axis, and estimates the temperature and the magnetic flux of the permanent magnet, based on the control command and the γ-δ axis currents.
Dependencies are inferred from the claim text.