To suppress a rise in component temperature of a component located at or near a power supply line while avoiding excessive current limitation.SOLUTION: A motor control device includes rotation speed detection units 52, 61, which detect a motor rotation speed Nr of an electric motor 20, an inverter applied voltage detection unit 54, which detects an inverter applied voltage, which is a voltage applied to an inverter 50, a temperature detection unit 53, which detects a component temperature of a component located at or near a power supply line, a current limit value calculation unit 71, which calculates a plurality of current limit values for limiting a current command value at least according to a motor rotation speed and an inverter applied voltage so as to limit a power supply current to a plurality of upper limit values or less respectively, and a current limit value selection unit 72, which selects any of the plurality of current command values calculated by the current limit value calculation unit 71 according to a component temperature.SELECTED DRAWING: Figure 5
【課題】過剰な電流制限を回避しながら電源ライン又はその近傍に配置された部品の部品温度の上昇を抑制する。【解決手段】モータ制御装置は、電動モータ20のモータ回転速度Nrを検出する回転速度検出部52、61と、インバータ50への印加電圧であるインバータ印加電圧を検出するインバータ印加電圧検出部54と、電源ライン又はその近傍に配置された部品の部品温度を検出する温度検出部53と、複数の上限値以下に電源電流をそれぞれ制限するように電流指令値を制限するための複数の電流制限値を、少なくともモータ回転速度及びインバータ印加電圧に応じて決定する電流制限値決定部71と、電流制限値決定部71が決定した複数の電流指令値の何れかを部品温度に応じて選択する電流制限値選択部72と、を備える。【選択図】図5
MOTOR CONTROL DEVICE, ELECTRIC ACTUATOR PRODUCT, AND ELECTRIC POWER STEERING DEVICE
モータ制御装置、電動アクチュエータ製品及び電動パワーステアリング装置
2021-08-10
Patent
Elektronische Ressource
Japanisch
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