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Created by alisa on 9th Jan 2015 , 11:44 am Germany, Berlin
Description Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor Specifications 1.IEC standard 2.OEM 3.Voltage:50HZ &60HZ;380V&415V 4.Protection class: IP54 5.Packaging Details:80-112 carton box 132 and above ply wooden box Usually do motor blocked or current-limiting experiment, is to make the power tube conduction completely, and then 3 phase induction motor gradually increase the load until the motor speed to zero. Assuming that current controller can diesel engine achieve a certain control points is chopping, what's happening in the experimental process: in the <strong><a href="http://acmotor2.blogspot.com/">acmotor2.blogspot.com</a></strong> beginning, the load is lighter, the battery and motor current is equivalent continuous current, along with the load increase, both to increase until the control points. To the locus of control, the controller immediately chopper and rapidly to control pulse duty cycle stability in the corresponding to the load on the value of equivalent to immediately (6) into (3) to describe the motor features, this is a control circuit of the adjustment period. Control points, the battery and motor current (refers to the average, similarly hereinafter) are equal, no longer with the <strong><a href="http://www.dongfeng-motor.com/HTML/Products/">single phase motor</a></strong> increase of load, the speed is three phase induction motor more and more small, counter electromotive force is more and more small, the motor current is more and more big, the control pulse duty ratio is more and more small, to plugging turn back emf ED to 0, the control pulse duty ratio gradually stable value in the design, then after a few transition time, motor current reaches the maximum IDmax, current limiting function implementation. This knowledge, the above control point is the beginning of the current limiting points, referred to as "current limit point. To added points: 1. The motor stuck fast and slow is controlled, so the length of the current limiting process is controllable. 2. The current limit implementation <strong><a href="http://www.dongfeng-motor.com/HTML/Products/">ac synchronous generator</a></strong> of water pump price motor current can only be monotonically, maximum is IDmax. Therefore, the current limit is really for it. 3. The current limit after the start of the battery current is not monotonically, but rather monotonous, so motor stalling a slow will see it on the measuring instrument suddenly go back to the bad phenomena. Wall magnetic generator is fast but can't see, this is caused by instrument response speed slow. Figure 2 shows the phenomenon.
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