什么是变频器以及工作原理： What is a converter and how it works: 变频器是为了到达节能目的，在满足工艺要求情况下而采用一种新的节能设备来实现节能目的，从而满足需求。变频器是利用电力半导体器件的通断作用将工频电源变换为另一频率的电能控制装置。变频器主要由整流、滤波、逆变、制动单元、驱动单元、检测单元微处理单元等组成的。变频器是把工频电源变换成各种频率的交流电源，以实现电机的变速运行的设备，其中控制电路完成对主电路的控制，整流电路将交流电变换成直流电，直流中间电路对整流电路的输出进行平滑滤波，逆变电路将直流电再逆成交流电。变频调速是通过改变电机定子绕组供电的频率来达到调速的目的。 The frequency converter is designed to meet the requirements by adopting a new energy-saving device to meet the requirements of the technology. The converter is a power control device that transforms the power supply into another frequency by using the power semiconductor device. The frequency converter consists mainly of rectifying, filtering, inverting, braking unit, driving unit, detecting unit microprocessing unit etc. Inverter is the power to transform the various frequency power frequency ac power, so as to realize the variable speed motor running of equipment, including control circuit to complete the control of the main circuit, rectifier circuit will be alternating current into direct current, dc intermediate circuit to smooth filtering of the output of the rectifier circuit, inverter circuit dc inverse again into alternating current. Frequency conversion speed is achieved by changing the frequency of the power supply of the stator winding of the motor.