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公开(公告)号:US4661757A
公开(公告)日:1987-04-28
申请号:US673749
申请日:1984-11-01
申请人: Sadao Hokari , Takamasa Hori , Katsu Komuro , Takanobu Hatakeyama , Toshiroo Narita , Yasunori Katayama , Noboru Arahori
发明人: Sadao Hokari , Takamasa Hori , Katsu Komuro , Takanobu Hatakeyama , Toshiroo Narita , Yasunori Katayama , Noboru Arahori
CPC分类号: H02P29/0022 , B66B1/30 , H02P3/18 , Y10T307/615
摘要: In a controller for an AC elevator in which the frequency of AC power applied to a driving induction motor is varied by a frequency converter, the output frequency of the frequency converter when the elevator is running at its rated speed is at least as high as the frequency of the AC supply, and the AC supply is applied directly onto the induction motor without any frequency conversion during low-speed running, so that the elevator can be run slowly without using the frequency converter.
摘要翻译: PCT No.PCT / JP84 / 00090 Sec。 371日期1984年11月1日 102(e)1984年11月1日PCT PCT Fils 3月7日,PCT PCT。 公开号WO84 / 03486 日期:1984年9月13日。在用于交流电梯的控制器中,其中施加到驱动感应电动机的交流电力的频率由变频器改变,当电梯以其额定速度运行时,变频器的输出频率 至少与交流电源的频率一样高,并且在低速运行期间将AC电源直接施加到感应电动机上而不进行任何频率转换,使得电梯可以缓慢地运行而不使用变频器。