How to choose the right inverter?
1, constant power load
During the operation of the load device, the power remains constant. Such as machine tools, cutting machines, paper machines and so on.
For example: a marble cutting machine frequency conversion system, is a constant power load, load inertia, inverter selection configuration A power with the G-type machine, plus the braking unit and braking resistor.
, fan, pump load
This is the most suitable for use in frequency conversion speed of the scene environment, the inverter function technology is not too high requirements, the use of inverter energy saving effect is remarkable.
For example: a large-scale heating equipment in a large-scale heating system, including blower, induced draft fan (centrifugal fan) inverter configuration configuration with the power of the P-type machine; water pump (centrifugal pump) inverter configuration configuration with the power of the P-type machine ; Conveyor pump frequency converter selection configuration with the power of G-type machine; belt machine (coal feeder) inverter configuration configuration to enlarge a file of the G-type machine; slag converter inverter configuration configuration to enlarge a file of the G-type machine; Crusher (coal crusher) inverter configuration configuration to enlarge a file or two stalls of the G-type machine.
2, constant torque load
Constant torque load equipment requires low frequency inverter torque, dynamic response speed. Inverter 0HZ vector state, to 150% of the torque, to meet the needs of various conditions.
For example: a dredger owner bucket inverter system, is a constant torque load, dual motor, and the load overload time is long, so the inverter configuration configuration to enlarge the two models of the G-type machine, while the power supply for the device Machine power supply, the inverter must be configured to input AC reactor.
Inverter selection science or not for the normal operation of the frequency conversion system is essential. Many beginners on the general inverter selection method is not enough understanding, or even know the method, not sure the choice of the inverter model is positive solution, the following for everyone to solve the mystery.
Inverter selection first look at the AC motor. Because the frequency conversion system generally first determine the motor, then select the inverter. In principle, it is necessary to determine the inverter model based on the actual current at which the AC motor is operating for a long time, and not on the motor nameplate.
Inverter selection next depends on the load type. Frequency conversion system driven load equipment can be divided into three types: constant torque load, constant power load, fan, pump load, different load type select the inverter model is different.
