Inverter: As an important AC speed control system, inverter is used as the transmission scheme of choice in many cases. When using the inverter, if a fault occurs, it should be handled in time. If you are not a professional maintenance personnel, how to analyze the inverter failure? The following Mercer inverter manufacturer will introduce in detail the causes and treatment methods of some common inverter failures:

Inverter parameter setting error

The parameter setting of the inverter is very important for whether the commonly used inverter can meet the requirements of the drive system. If the parameter setting is incorrect, the inverter will not work properly.

1.Inverter parameter setting

When leaving the factory, each parameter of the commonly used inverter has a default value. These parameters are called factory values. Under these parameter values, users can operate normally through panel operation, but panel operation cannot meet the requirements of most transmission systems. Therefore, before using the inverter correctly, users should perform the following work on inverter parameters:

①Confirm the motor parameters. The inverter sets the power, current, voltage, speed and maximum frequency of the motor in the parameters. These parameters can be obtained directly from the motor nameplate.

②The control method adopted by the inverter, that is, speed control, torque control, PID control or other methods. After the control method is adopted, static or dynamic identification is usually required according to the control accuracy.

③Set the start mode of the inverter. Usually, the inverter is set to start from the panel when it leaves the factory. Users can choose the start mode according to actual conditions, and can use the panel, external terminals, communication methods, etc.

④For the selection of a given signal, the frequency setting of a general inverter can also be given in a variety of ways, such as panel setting, external setting, external voltage or current setting, communication mode setting, and of course the frequency setting of the inverter can also be one or a combination of these methods. After the above parameters are set correctly, the inverter can basically work normally. If you want to get a better control effect, you can only modify the relevant parameters according to the actual situation.

2.How to deal with inverter parameter setting errors

Once a parameter setting failure occurs, the inverter will not operate normally. Generally, the parameters can be modified according to the manual. If the above method does not work, it is best to restore all parameters to the factory values ​​and then reset them according to the above steps. The parameter recovery method of each company's inverter is different.