Dongweiting inverter maintenance

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Dongweiting Inverter Maintenance
.] In this description
, if there is a contactor or other electrical appliance between the inverter and the motor, you should also check whether the terminals of the relevant electrical appliance are are tightened, and whether the contact condition of the contacts is good, etc. If the three-phase voltage on the motor side is balanced, you should know the operating frequency when tripping. If the operating frequency is low and vector control is not used, first reduce the / ratio. If If the load can still be driven after reducing it, it means that the original preset / ratio is too high and the peak value of the excitation current is too large. The current can be reduced by reducing the / ratio. If the load cannot be carried after lowering, you should consider increasing the capacity of the frequency converter. If the frequency converter has a vector control function, the vector control method should be used. The main circuit of the frequency converter can be roughly divided into two types: the voltage type is a frequency converter that converts the DC of the voltage source into AC, and the filter of the DC circuit is a capacitor, and the current type is a frequency converter that converts the DC of the current source into AC. The DC loop filter is an inductor, which consists of three parts, the rectifier, the smoothing loop and the inverter. Recently, diode converters are widely used, which convert power frequency power into DC power. Two sets of transistor converters can also be used to form a reversible converter. Since its power direction is reversible, it can perform regenerative operation. The DC voltage rectified by the rectifier contains a pulsating voltage six times the frequency of the power supply. In addition, the pulsating current generated by the inverter also causes the DC voltage to fluctuate. In order to suppress voltage fluctuations, inductors and capacitors are used to absorb pulsating voltage (current). If there is a contactor or other electrical appliances between the frequency converter and the motor, you should also check whether the terminals of the relevant electrical appliances are tightened and whether the contacts are in good condition. If the three-phase voltage on the motor side is balanced, you should understand Operating frequency during tripping. If the operating frequency is low and vector control is not used, first reduce the / ratio. If the load can still be driven after lowering, it means that the original preset / ratio is too high and the peak value of the excitation current is too high. The current can be reduced by lowering the / ratio. If the load cannot be carried after lowering, you should consider increasing the capacity of the frequency converter. If the frequency converter has a vector control function, the vector control method should be used. The main circuit of the frequency converter can be roughly divided into two types: the voltage type is a frequency converter that converts the DC of the voltage source into AC, and the filter of the DC circuit is a capacitor, and the current type is a frequency converter that converts the DC of the current source into AC. The DC loop filter is an inductor, which consists of three parts, the rectifier, the smoothing loop and the inverter. Recently, diode converters are widely used, which convert power frequency power into DC power. Two sets of transistor converters can also be used to form a reversible converter. Since its power direction is reversible, it can perform regenerative operation. The DC voltage rectified by the rectifier contains a pulsating voltage six times the frequency of the power supply. In addition, the pulsating current generated by the inverter also causes the DC voltage to fluctuate. In order to suppress voltage fluctuations, inductors and capacitors are used to absorb pulsating voltage (current). If there is a contactor or other electrical appliances between the frequency converter and the motor, you should also check whether the terminals of the relevant electrical appliances are tightened and whether the contacts are in good condition. If the three-phase voltage on the motor side is balanced, you should understand Operating frequency during tripping. If the operating frequency is low and vector control is not used, first reduce the / ratio. If the load can still be driven after lowering, it means that the original preset / ratio is too high and the peak value of the excitation current is too high. The current can be reduced by lowering the / ratio. If the load cannot be carried after lowering, you should consider increasing the capacity of the frequency converter. If the frequency converter has a vector control function, the vector control method should be used. The main circuit of the frequency converter can be roughly divided into two types: the voltage type is a frequency converter that converts the DC of the voltage source into AC, and the filter of the DC circuit is a capacitor, and the current type is a frequency converter that converts the DC of the current source into AC. The DC loop filter is an inductor, which consists of three parts, the rectifier, the smoothing loop and the inverter. Recently, diode converters are widely used, which convert power frequency power into DC power. Two sets of transistor converters can also be used to form a reversible converter. Since its power direction is reversible, it can perform regenerative operation. The DC voltage rectified by the rectifier contains a pulsating voltage six times the frequency of the power supply. In addition, the pulsating current generated by the inverter also causes the DC voltage to fluctuate. In order to suppress voltage fluctuations, inductors and capacitors are used to absorb pulsating voltage (current).
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. Dongweiting Inverter Repair
.] Product Features
Before sending it for repair, please record the parameter settings and wiring diagram of the machine to be repaired in detail for convenience Correct installation after repair saves debugging time. When sending for repair, please clearly describe the fault phenomenon and the circumstances related to the occurrence of the fault in words and send it to our company randomly to facilitate timely diagnosis and repair of the fault by maintenance personnel. If customers send the machine to be repaired to our company through a courier company, please use outer packaging and fillers before sending, and package it properly. Otherwise, the casing and circuit board may be damaged, and our company will not be responsible.
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. Dongweiting inverter repair
.】After-sales service
, service commitment The company creates the greatest value for customers with first-class technology and first-class service. In principle, the company puts credibility first, customers first, and keeps your maintenance costs to a minimum so that customers can truly enjoy the discounts and feel satisfied. It is our consistent work requirement to think about what users want and think about what users want! . The standard maintenance time is one working day, and the expedited maintenance is one working day. In emergencies, repairs can be carried out on site, and the repaired circuit boards can be tested on site (if it is difficult to purchase components, this standard will not be followed). The original faulty part of the equipment circuit board is guaranteed for three months. Customers in need are welcome to call us and look forward to cooperating with you