MOTOR TEMPERATURE ESTIMATION METHOD
MOTOR TEMPERATURE ESTIMATION METHOD
- New search for: MISUMI MASAYA
- New search for: MAKINO TOMOYOSHI
To solve the problem of incapability of accurately estimating a motor's temperature using only the motor's temperature rise value calculated from a current value and a rotational frequency of a main motor.SOLUTION: A motor temperature estimation method has a power conversion device for converting power from an overhead wire, a motor to be driven using power supplied from the power conversion device, a current sensor for detecting motor current flowing through the motor, a rotational frequency sensor for detecting a rotational frequency of the motor, and an ambient temperature sensor for detecting an ambient temperature. The motor temperature estimation method calculates a temperature of the motor on the basis of the motor current detected by the current sensor, the rotational frequency detected by the rotational frequency sensor, and the ambient temperature detected by the ambient temperature sensor.SELECTED DRAWING: Figure 1
【課題】 主電動機の電流値及び回転数から求めた電動機の温度上昇値のみでは、電動機の温度を正確に推定することができなかった。【解決手段】 電動機の温度推定方法において、架線からの電力を変換する電力変換装置と、電力変換装置から供給される電力により駆動される電動機と、電動機に流れる電動機電流を検出する電流センサと、電動機の回転数を検出する回転数センサと、外気温を検出する外気温センサとを有し、電流センサで検出された電動機電流、回転数センサで検出された回転数および外気温センサで検出された外気温に基づいて、電動機の温度を算出する。【選択図】 図１
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MOTOR TEMPERATURE ESTIMATION METHOD
Patent
Electronic Resource
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