Speed controller of elevator
专利汇可以提供Speed controller of elevator专利检索，专利查询，专利分析的服务。并且PURPOSE:To prevent the damage of an electronic circuit parts due to abrupt discharge of a smoothing condenser at the restarting time by discharging the stored charge of the condenser when restarting in an emergency stop path. CONSTITUTION:When a safety switch is operated during elevating of an elevator, a main circuit switch is opened to open the supply of an AC power source. When a main circuit switch is opened, its contact 21 is closed to form a discharge path. Accordingly, charge stored in a smoothing condenser 4 is discharged through a discharging resistor 20 and a contact 21. When the safety switch is reset, an elevator is restarted after the prescribed time, but at this time the charge of the condenser 4 is all discharged, and the output voltage becomes substantially zero. Accordingly, the output of the condenser 4 at the restarting time does not flow excess current to a thyristor converter 3.，下面是Speed controller of elevator专利的具体信息内容。
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