| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a controller of an elevator winding machine. <P>SOLUTION: The output voltage of an inverter is applied to a motor through the contact of a first electromagnetic contactor, to control the rotational speed of the motor. In emergency braking, an input terminal is shorted through the contact of a second electromagnetic contactor. The second electromagnetic contactor is electrified through a diode bridge. Both first and second electromagnetic contactors are an AC contactor, and the first electromagnetic contactor is electrified through an normally open contact of the second electromagnetic contactor. <P>COPYRIGHT: (C)2004,JPO |
