| 摘要 |
The temperature state of a bimetal matches with that of a motor even when the difference between the operating temperature and the reset temperature is small to maintain the lifetime of the bimetal. A motor protector (100) comprises a bimetal disc (220) provided on the current path for supplying a current to the rotor of a motor and performing an inverting action depending on its own temperature, a fixed contact (254) provided on the current path, a movable contact (230) provided on the bimetal disc (220), coming in contact with the fixed contact (254) when the bimetal disc (220) is in a noninverted state, and separating from the fixed contact (254) when the bimetal disc (220) is in an inverted state, and a PTC thermister (240) provided on the current path in parallel with the fixed contact (254), coming in contact with the bimetal disc (220) when the bimetal disc (220) is in a noninverted state, and separating therefrom when the bimetal disc (220) is in an inverted state. |
