1, the use of frequency conversion purposes; constant pressure control or constant current control.
2. The load type of the frequency converter; such as the vane pump or positive displacement pump, pay special attention to the performance curve of the load, and the performance curve determines the method and method of application.
3, the matching problem of frequency converter and load;
1) Voltage matching; the rated voltage of the frequency converter matches the rated voltage of the load.
2) Current matching; ordinary centrifugal pump, the rated current of the inverter is in line with the rated current of the motor. For special loads such as deep water pumps, etc., refer to the motor performance parameters and determine the inverter current and overload capacity with the maximum current.
3) Torque matching; this may happen with constant torque loads or with deceleration devices.
4. When using the inverter to drive the high speed motor, due to the small reactance of the high speed motor, the higher harmonics increase the output current value. Therefore, for the selection of inverters for high-speed motors, the capacity of the inverters is slightly larger than that of ordinary motors.
5. If the inverter requires a long cable run, measures must be taken to suppress the influence of long cable-to-ground coupling capacitance and to avoid insufficient output from the inverter. In this case, the inverter capacity must be amplified by one gear or at the inverter. The output side installs output reactors.
6, for some special applications, such as high temperature, high altitude, this time will cause the derating of the inverter, the inverter capacity to amplify a block. Domestic inverter manufacturers
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Yangzhou IdealTek Electronics Co., Ltd. , https://www.idealtekpower.com