| 摘要 |
PURPOSE:To detect the holding of a foreign matter positively without being subject to the effect of the change of the temperature of a motor. CONSTITUTION:In the control method of the opening and closing of a switchgear consisting of an opening-closing body, a motor 3 and a transmission mechanism opening and closing the opening-closing body by the driving force of the motor 3, the rotational period of the motor computed on the basis of an output from a pulse generating means 4 detecting the angle of rotation of the motor and a threshold set in response to outputs from temperature detecting means 5, 7 detecting a temperature in the switchgear are compared, the holding of a foreign matter is detected, and closing operation is stopped and controlled. The temperature of the motor 3 or the atmospheric temperature of the transmission mechanism is detected particularly by the temperature detecting means 5, 7. |
