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变频器电源变压器的某些常见故障解决

浏览量:   来源:www.sdbczdh.com  作者:宝川变频器

离线维修指在松掉软启动器主电源电路后的,山西太原三菱变频器故障学习培训对开关电源/驱动器板的独立通电维修,维修好以后确定驱动器板全部常见故障清除再上机操作检测,以保证IGBT的安全性,先看一下1个数据测试表,今天山东变频器维修公司和大家一起看一下变频器开关电源的一些故障现象和处理方法。


Off-line maintenance means that after loosening the main power supply circuit of soft starter, Mitsubishi Inverter Fault Learning Training in Taiyuan, Shanxi Province, maintains the switching power supply/driver board independently. After maintenance, it is determined that all the common faults of the driver board are cleared and then operated on the computer to ensure the safety of IGBT. First, look at a data test table. Today, Shandong Inverter Maintenance Company and everyone work together. Look at some fault phenomena and treatment methods of frequency converter switching power supply.


1、用数字式万用表,则能算出表4-3中的统计数据。指针式万用表的交流电流档,也可以显示信息稍大的交流电压值,故在关机情况,仍显示信息必须工作电压值,但在启动情况,表笔立刻反方向标示-表明指针式万用表的交流电流档,虽能测出信号电压的峰值,但仍能指示出电压的极性。


1. By using digital multimeter, the statistical data in Table 4-3 can be calculated. The AC current gear of the pointer multimeter can also display a slightly larger AC voltage value of the information. Therefore, when the power is off, the information must still display the working voltage value. But in the start-up situation, the pen immediately indicates the opposite direction - indicating that the AC current gear of the pointer multimeter can measure the peak value of the signal voltage, but it can still indicate the polarity of the voltage.


2、当驱动供电电压为15V和-7V时,检测得出的输出侧的电压值也相应降低。


2. When the driving power supply voltage is 15V and -7V, the voltage value of the output side detected also decreases accordingly.


3、因电源电路电子器件的离散性、各界驱动电源工作电压的英威腾变频器维修培训差别及其不一样型号规格软启动器PWM(SPWM)单脉冲波型的差别,精确测量所算出的动态性工作电压值也会有很大的差别。如从开启接线端子测出交流电流值,其峰值往往大致接近供电电压值,一般只要满足在13V以上,IGBT就能可靠工作,六路脉冲电压的幅度也有所差异。所以即使同一种采用同一种驱动IC的不同型号的变频器,也不可能测得一样的结果。我们不必从数值的精确度上太过讲究,可完全从动、静态电压值、电压极性的明显变化上,判断出驱动电路的工作状态。


3. Because of the discreteness of power circuit and electronic devices, the difference of maintenance and training of Inviden Inverter in driving power supply voltage from all walks of life, and the difference of single pulse waveform of PWM (SPWM) soft starter of different types and specifications, the dynamic working voltage value calculated by accurate measurement will also vary greatly. If the AC current value is measured from the open terminal, its peak value is usually close to the supply voltage value. Generally, as long as the IGBT is above 13V, it can work reliably, and the amplitude of the six-way pulse voltage is different. Therefore, even if the same type of converter uses the same driver IC of different models, it is impossible to measure the same results. We need not pay too much attention to the accuracy of the numerical value. We can judge the working state of the driving circuit from the obvious changes of the passive, static voltage and voltage polarity.


每一路上光耦电路,能够立即从驱动器IC的2个键入脚检验键入数据信号,从驱动器数据信号的輸出接线端子(控制模块开启接线端子)检验輸出数据信号。


In each path, the optocoupler circuit can immediately check the input data signal from the two input pins of the driver IC and the output data signal from the output terminal of the driver data signal (the control module opens the terminal).


若输人信号电压为零,则往前检测从CPU至驱动IC的信号传输电路,检测内容请见第汇川变频器维修培训7章脉冲信号的前级电路检测;若有输入信号,CN1附、CN22的输出信号端子则可能有以下几种情况:


If the input signal voltage is zero, the signal transmission circuit from CPU to driving IC is detected forward. For the detection content, see Chapter 7 of Huichuan Inverter Maintenance Training Chapter. If there are input signals, the output signal terminals of CN1 and CN22 may be as follows:


1)用50V沟通交流档测PC923的6脚工作电压,若过低(如仅为10V),三菱变频器故障全集比照精确测量一下下PC929 的键入2、 3脚工作电压,若稍低,则往前检测从至驱动忆的信号传输电路。


1) Measure the 6-foot working voltage of PC92 3 with 50V communication AC file. If it is too low (for example, only 10V), Mitsubishi Inverter Fault Complete Measure the input 2 and 3-foot working voltage of PC929 accurately. If it is slightly low, the signal transmission circuit from PC 929 to driving memory will be detected forward.

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