Motor

Abstract

A motor is provided which can detect a rotor temperature with high precision with a simple configuration not taking an influence on a temperature caused by circulation of a cooling oil into account. In a motor including a rotor, a stator arranged around the rotor, and a temperature sensor, the rotor includes an oil reservoir unit that reserves an oil on a rotating shaft line in an interior thereof, and the temperature sensor detects a temperature of the oil reserved in the oil reservoir unit.

1 . A motor comprising: a rotor, a stator arranged around the rotor, and a temperature sensor,
 wherein the rotor includes an oil reservoir unit that reserves an oil on a rotating shaft line in an interior thereof, and   wherein the temperature sensor detects a temperature of the oil reserved in the oil reservoir unit.   
     
     
         2 . The motor according to  claim 1 ,
 wherein the temperature sensor has one end fitted to a motor cover of the motor, and the other end inserted into the oil reservoir unit on the rotating shaft line of the rotor, and contacting with the oil.   
     
     
         3 . The motor according to  claim 1 ,
 wherein the temperature sensor includes a housing having a cylindrical portion and a bottom portion, and a temperature detection unit arranged on an inner peripheral surface of the cylindrical portion.   
     
     
         4 . The motor according to  claim 2 ,
 wherein an oil seal that prevents the oil reserved in the oil reservoir unit from being leaked out of the rotor is arranged between the temperature sensor and the rotor.   
     
     
         5 . The motor according to  claim 3 ,
 wherein the temperature detection unit is arranged on the inner peripheral surface of the cylindrical portion on a lower side of the motor.   
     
     
         6 . The motor according to  claim 1 ,
 wherein the motor includes an oil storage chamber, the rotor includes an oil supply path on the rotating shaft line in an interior thereof, and the oil storage chamber and the oil reservoir unit communicate with each other through the oil supply path.   
     
     
         7 . The motor according to  claim 6 ,
 wherein the oil supply path includes an oil circulation path having at least an oil inflow path and an oil outflow path.   
     
     
         8 . The motor according to  claim 7 ,
 wherein the rotor includes a continuous hole that communicates between the oil circulation path and the oil reservoir unit, and the continuous hole is pierced in the rotating shaft line.   
     
     
         9 . The motor according to  claim 1 ,
 wherein the motor includes a temperature calculation unit for calculating a rotor temperature and/or a temperature of a magnet embedded in the rotor according to an oil temperature detected by the temperature detection sensor.