Research On Protector Of Synchronous Electromotor

The synchronous electromotor is used extensively for dragging the load of big capacity and invariableness turn because of its advantages of constant turning and adjustable power factor. In its performance,the electromotor will breakdown because of influence of power net fluctation and overload.these not only influent product,but also damage equipments. Therefore, the research of synchronous electromotor's protecting facility is very important for protecting the safety and steady of synchronous electromotor.In this paper, the operation states of synchronous electromotor are. analyzed in detail. It finds out the judgment and solution methords of synchronous electromotor's losing step, overloading, losing-load and the unbalance of three mutually alternate current. In the aspect of losing step protection, a good way -accumulative total of overloading to diagnose troubles is adopted in order to avoid injure of synchronous electromotor. This method's principle is simple, credibility and highly general use.The microchip is used as the core of the synchronous electromotor's protector in this paper. It can collect the electric current signal of synchronous electromotor by various sensors; get the changing of A/ D and the deal of data, and then get a result of judgment. single chip computer is very cheap. It can be used very widely. The customers can set each parameter according to the actual operation states of synchronous electromotor. So it provides the reliability and currenty.In the aspects of, establishing the second dealing after losing step is used to deal with diagnosing troubles and process the losing step of the protector automatically. Because some troubles can't handle overloading, losing-load and the imbalance of three phase current automatically, the protector will alarm and show the breakdown information. It is convenient for customers to expel the faults in time.The protecting facility of synchronous electromotor can get a correct response to trouble signal by experiment. In fact, this protecting facility can protect synchronous electromotor reliably, reaching the requirement of protection to synchronous electromotor. The protector of synchronous electromotor can do correct response to deal with the faults signal and reach the protecting aim to synchronous electromotor.