6 points for choosing the right type of inverter
The following points should be determined when selecting the inverter model:
1. The purpose of using frequency conversion; constant voltage control or constant current control, etc.
2. Type load of the frequency converter; such as vane pump or positive displacement pump, etc., pay special attention to the performance curve of the load. The performance curve determines the method of application.
3. The matching problem of the inverter and the load;
1) Voltage matching; the rated voltage of the inverter matches the rated voltage of the load.
2) Current matching: For ordinary centrifugal pumps, the rated current of the frequency converter matches the rated current of the motor. For special loads such as deep water pumps, it is necessary to refer to the motor performance parameters to determine the inverter current and overload capacity by the current.
3) Torque matching; this situation may occur under constant torque load or when there is a deceleration device.
4. When using a frequency converter to drive a high-speed motor, due to the low reactance of the high-speed motor, the increase in high-order harmonics causes the output current value to increase. Therefore, the capacity of the inverter used in high-speed motors is slightly larger than that of ordinary motors.
5. If the inverter needs to run with a long cable, measures should be taken at this time to suppress the influence of the coupling of the long cable to the ground and avoid insufficient output of the inverter. Therefore, in this case, the inverter capacity should be enlarged by one gear or the output of the inverter should be enlarged. Install an output reactor at the end.
6. For some special applications, such as high temperature and high altitude, the inverter will be derated at this time, and the inverter capacity should be enlarged by one level.
Jact inverter providers can provide customers with better suggestions for purchasing models, and sell industry-specific inverters, saving you more troubles when purchasing.