| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small and inexpensive elevator brake control device reducing the number of component items of a control circuit for switching a forcible exciting current to a brake coil, a holding current and no current to simplify the circuit. <P>SOLUTION: The elevator brake control device comprises: a brake power transformer 1 having secondary wiring wherein a low-voltage output terminal 12 is drawn out from the middle of high-voltage wiring between a standard-voltage output terminal 11 and a high-voltage output terminal 13; an electromagnetic contactor 2 connected to the high-voltage output terminal 13 and turned on only at start of an elevator to output high voltage; an electromagnetic contactor 3 connected to the low-voltage output terminal 12 and turned on all the time during elevator operation to output low voltage; an electromagnetic contactor 3 connected to the standard-voltage output terminal 11 and determining whether or not a brake is operated; and rectifiers 4 connected between the electromagnetic contactors 2, 3 and the brake coil 5 and applying high voltage or low voltage to the brake coil 5, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT |
