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我们知道,采用交流感应电动机拖动的单筒绞车,在下放重物时,有两种合理的运行方式。一种是发电反馈;一种是动力制动。发电反馈是一种最经济的制动方法,它可以向电网馈送电能。但其运行速
We know that single winch driven by AC induction motor has two reasonable operation modes when placing heavy objects. One is power generation feedback; one is dynamic braking. Power generation feedback is one of the most economical braking methods, it can feed the grid power. But it runs fast