TEMPERATURE ESTIMATION DEVICE

PROBLEM TO BE SOLVED: To provide a temperature estimation device of a rotor of a dynamo-electric motor, which has a high general purpose.SOLUTION: In a temperature estimation device, an output torque Tthat is an actual torque of a dynamo-electric motor 1 that is operated in accordance with a driving signal (a three-phase current i, i, i) detected by six torques, is acquired, a torque calculation device 13 acquires: the driving signal (the three-phase current i, i, i); a position detection signal (a rotation angle θ) of the dynamo-electric motor 1, a d-axis inductance; q-axis inductance; and a calculation torque Tas a torque of the dynamo-electric motor 1 in a reference temperature calculated on the basis of a magnetic flux interlinked with a d-axis armature winding by a permanent magnet field in the reference temperature. Thus, a temperature of the dynamo-electric motor 1 is estimated on the basis of difference of the output torque Tand a calculation torque T.SELECTED DRAWING: Figure 1 【課題】汎用性の高い電動機のロータの温度推定装置を提供する。【解決手段】トルク計６によって検出された、駆動信号（三相電流ｉｕ，ｉｖ，ｉｗ）に従って動作する電動機１の実際のトルクである出力トルクＴｏｕｔと、トルク演算器１３が、駆動信号（三相電流ｉｕ，ｉｖ，ｉｗ）と、電動機１の位置検出信号（回転角θｍ）と、ｄ軸インダクタンスと、ｑ軸インダクタンスと、基準温度における、永久磁石界磁によるｄ軸電機子巻線と鎖交する磁束に基づいて演算した、基準温度における電動機１のトルクである演算トルクＴｒｅｆ２０と、を取得して、出力トルクＴｏｕｔと演算トルクＴｒｅｆ２０との差分に基づいて、電動機１の温度を推定する。【選択図】図１