The output side of the inverter is PWM wave, and there is the capacitive effect of the long cable between the motor cable and the earth. When the cable with shielding layer is used, the capacitive effect is more obvious. When the inverter is working, the capacitor is charging and discharging. A current flows into the earth through the capacitor and flows back to the inverter from the grounding wire on the side of the input line to form a current loop.

In the actual operation process, the frequency converter will always be affected by the use of the environment, such as temperature, humidity, air quality and so on. It is hard to avoid that there are all kinds of fine dust floating in the production workshop

The frequency converter light failure does not affect the system continuous operation. After the light fault of the inverter, the inverter will only provide the fault report. The user can find the fault by recording the fault of the touch screen of the inverter. If this kind of fault occurs during system operation, the inverter will not stop immediately. In the state of stop, if there is such a fault, the user can also start operations.

The frequency converter is a kind of high-tech product, mainly composed of power electronic devices and microelectronic devices. The three-phase ac power grid is connected to the input end of the converter. The input terminal of the inverter is the rectifier circuit and the output terminal is the frequency conversion circuit. Therefore, the voltage and current on the input side and the output side contain rich harmonics

Generally speaking, the factory motor is based on a given power-frequency voltage (380V, 50hz) to obtain the rated speed value. If it does not reach 380V under actual working conditions, such as only 300V and 50hz, the voltage is obviously under pressure. Basically, it can't reach the rated speed because, depending on the design of the motor, it must have a voltage of 380V and a frequency of 50hz.

On the control panel of frequency converter: ENTER. Parameter confirmation. After we adjust the value of the parameters to be adjusted, we need to press this key to confirm the storage;

Inverter is a power control device that converts power supply into another frequency by the on-off action of power semiconductor devices. With the rapid development of modern power electronic technology and microelectronic technology, the high-voltage and high-power variable-frequency speed regulating device is becoming increasingly mature. In recent years, the high-voltage problem, which was always difficult to solve, has been well solved by means of device series or unit series.