Temperature estimation apparatus for estimating temperature of motor
AssigneeFanuc Corporation
InventorTatsuya Senoo
Life of this patent
Estimating the term…
Abstract
A coefficient value acquiring unit acquires values of coefficients C and K representing a relationship among a heat generation amount of a motor generated due to a loss Q1(t) of the motor, a temperature variation amount of the motor, and a placement position of a temperature detection device, using the loss Q1(t) of the motor, a detection temperature Td(t), and an ambient temperature Ta of the motor. The temperature estimating unit estimates a temperature Te(t) of the motor based on the values of the coefficients C and K, a preset reference value Cm of the coefficient C, a preset reference value Km of the coefficient K, the detection temperature Td(t), and the ambient temperature Ta of the motor.
Claims3
A temperature estimation apparatus comprising:
- a loss calculating unit for calculating, in a preset period of time, a loss of a motor;
- a detection temperature acquiring unit for sequentially acquiring a detection temperature detected by a temperature detection device disposed in the motor in each preset sampling period over the preset period of time;
- a coefficient value acquiring unit for acquiring a value of a coefficient representing a relationship among a heat generation amount of the motor generated due to the loss, a temperature variation amount of the motor, and a placement position of the temperature detection device, by using the loss calculated by the loss calculating unit, the detection temperature acquired by the detection temperature acquiring unit, and an ambient temperature of the motor;
- and
- a temperature estimating unit for estimating a temperature of the motor based on the value of the coefficient, a preset reference value of the coefficient, the detection temperature acquired by the detection temperature acquiring unit, and the ambient temperature of the motor.
Dependencies are inferred from the claim text.