Inverter (Variable-frequency Drive, VFD) is the application of inverter technology and microelectronic technology, by changing the frequency of the motor operating power to control the AC motor power control equipment. Inverter mainly by rectifier (AC to DC), filter, an inverter (DC-AC), the brake unit, the drive unit, a detection unit micro processing unit and other components. Internal IGBT inverter by breaking the power to adjust the output voltage and frequency of the inverter brand, according to the actual needs of the motor to provide power supply voltage they need, and thus achieve the purpose of energy conservation, the governor, and the other inverter manufacturers, inverter There are a lot of protection function of the inverter, such as overcurrent, overvoltage, overload protection and so on. With the continuous improvement of industrial automation, the drive has been very widely used. Increases the speed of the motor is not mainly due to: (1) AC or phase power inverter output phase of the inverter output voltage is reduced, resulting in a three-phase inverter output phase voltage asymmetry generated negative sequence torque converter prices, are smaller electromagnetic torque of the motor can not drive the load acceleration, you should check whether the fuse is blown, circuit breaker without loose wire connectors. (2) frequency or current setpoint smaller frequency is set at low points of the frequency can not be increased but not limited acceleration. Set current value is too small, the ability to produce maximum torque is limited, the motor torque is too small to be the remaining acceleration. Therefore, you should check the frequency and the current settings are appropriate. See current setpoint has reached the maximum inverter, which shows the drive capacity is too small, should be replaced by a larger capacity drive. (3) speed potentiometer is bad or damage related components, the frequency setpoint can not be increased. Drive repair | Yueyang Ohm Electric (certified) | Lake Drive by Ohm Electric Co., Yueyang City. Yueyang City Ohm Electric Co. (www.yyomdq.com/) Hunan Yueyang, inverters, frequency divider leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . In Yueyang Ohm Electric leadership with the staff warmly welcome all inquiries negotiations to create the ohmic electrical Yueyang a better future.