Running Status Of Power Electronic Equipment Forecast And Estimates

This paper presents a method of test, estimation and predication of some state parameters of the power unit in power and electric equipment, these parameters can be temperature, voltage, current and so on; when attaining the values of these parameters at the next state, whether the power unit will go into the malfunction or not can be knew, according to the result, some measures can be made; by controlling the values of correlative parameters, the unit could be maintained in its optimal running status; so the damage to the power unit can be prevented, the running quality of the driving system can be guarantied, and the optimized control level of the system can be improved.Whether military products or civilian products, traditional methods all depend on increasing redundancy, apparently, there is a limit to these measures; but, compared with the traditional method, the idea of this paper is an new technique, it is an method of predication and estimation, it can eliminate the malfunctions from the power unit before they will happen, it can make the power unit working continuously, steadily and reliably.The paper talks the necessary reason of predication and estimation of the power unit, and pays emphasis on the technique of predication and estimation of the DC voltage of the main electrocircuit in inverter and the temperature of the power unit, and then discusses the question from three aspects including constitution of mathematic model, completion of predicative arithmetic and experimentation. The technique could make the output voltage of the system without the close-loop steady when raising or detracting the frequency and could stop the power unit from being damaged as a result of too high temperature.