| The reactor in the circuit generally has two functions: | ||||||
| (1) Suppress surge (voltage and current); (2) Suppress harmonic current. | ||||||
| Reactors are divided into input reactors, output reactors and DC reactors in the use of frequency converters. | ||||||
| Different reactors have different functions on the frequency converter. | ||||||
| input reactor | ||||||
| It is used to limit the current impact caused by the sudden change of power grid voltage and switching overvoltage, | ||||||
| smooth the peak pulse contained in the power supply voltage, | ||||||
| or smooth the voltage defects generated during the commutation of bridge rectifier circuit, | ||||||
| effectively protect the frequency converter and improve the power factor. | ||||||
| It can not only prevent the interference from the power grid, | ||||||
| but also reduce the pollution of harmonic current generated by the rectifier unit to the power grid. | ||||||
| output choke | ||||||
| The main function is to compensate the influence of the distributed capacitance of the long line (20-200m), | ||||||
| reduce the motor ground leakage current, suppress the output harmonic current, | ||||||
| improve the output high-frequency impedance, and effectively suppress dv/dt. | ||||||
| Reduce the high-frequency leakage current, protect the frequency converter and reduce the equipment noise. | ||||||
| DC reactor | ||||||
| t is connected between the DC rectification link and inverter link of the frequency conversion system. | ||||||
| Its main purpose is to limit the AC component superimposed on the DC current to a specified value, | ||||||
| keep the rectifier current continuous, reduce the current pulse value, | ||||||
| make the inverter link operate more stably and improve the power factor of the frequency converter. | ||||||
Shenzhen Internet
