| 摘要 |
PURPOSE:To prevent the local heating in a rotary electric machine by interlocking internal pressure reducing means with a temperature sensor which is provided at a part in the machine. CONSTITUTION:When a local heat is generated at the prescribed part in a rotary electric machine, a temperature sensor 4 outputs a detection signal, which is transmitted through a signal cable 4a to a pump driving motor 3a and a valve 3d. Thus, the pump 3a starts operating, the valve 3d becomes open state, air is fed through an air pipe 3c into the machine, thereby enhancing the pneumatic pressure in the machine. Simultaneously upon starting of the pump 3a, a pump 2a is stopped by an interlock signal which is transmitted through interlocking wirings 6. When the detected value of the sensor 4 decreases lower than the prescribed value, the pump 3a is stopped, the valve 3d is closed, and the pump 2a is restarted. |
