Apparatus for controlling AC elevators

专利名称：Apparatus for controlling AC elevators发明人：Nobuo Mitsui,Yoshio Sakai,Masao

Nakazato,Mitsuyuki Honbu,ShigetaUeda,Seiya Shima,Katsu Komuro,TakekiAndo,Akiteru Ueda,Kazuhiko Sasaki,ToshiakiKurosawa

申请号：US06/90申请日：19860825公开号：US04779709A公开日：19881025

摘要：An elevator control apparatus comprises an inverter device for supplying aninduction motor for driving an elevator cage with AC electric power of variable voltageand frequencies and control equipment for controlling the output voltage and

frequencies of the inverter device in response to signals produced in floors served by theelevator and in an elevator cage. The inverter device is constructed by a converter unitfor converting AC electric power to DC electric power, at the input end of which acapacitor is connected in parallel with an AC electric source, an inverter unit for invertingthe DC electric power converted in the converter unit into AC electric power, at theoutput end of which a capacitor is connected in parallel with an induction motor fordriving the elevator cage and a DC reactor connected between the converter unit and theinverter unit.

The thus constructed elevator control apparatus does not cause interference inelectric appliances such as audio equipment, computer etc. existing within a building in

which the elevator is installed.

申请人：HITACHI, LTD.

代理机构：Antonelli, Terry & Wands

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