| 摘要 |
PURPOSE:To realize the forcible discharge of a capacitor between a DC bus bar securely and in a low cost method when a power source is cut off, in a control device of an elevator. CONSTITUTION:While the continuety condition of a regenerative current conductive element 14 by a voltage comparator circuit 24 is made that the voltage of capacitor 5 between a DC bus bar is larger a specific value or more than the output voltage of a rectifier 17 for charging, a capacitor 26 for charge accumulation to back up the power source of the voltage comparator circuit 24 is provided. And by using a voltage driving type element for the regenerative current conductive element 14, a regenerative power process circuit and a forcible charging circuit of the charge of the capacitor 5 between the DC bus bar are made common, so as to make unnecessary an electromagnetic contactor used exclusively as a forcible discharge of the charge of the capacitor 5 between the DC bus bar. |
