Inverter control variable frequency motor accuracy can generally reach how many turns - News - Global IC Trade Starts Here Free Join

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Now there is a project like this: a variable frequency motor drives the oil pump to pump oil. A flow meter is installed on the pipeline. The flowmeter signal is fed back to the plc. The feedback signal does not reach or exceed the set flow value on the touch screen. The PLC passes the PI operation or For other calculations, the output controls the frequency converter so that it approaches or reaches the set value. Such a project inverter can control the accuracy of the variable frequency motor can generally reach how many revolutions per minute?
A: The inverter is generally competent, but if you are asking for higher accuracy, it is recommended to use a servo motor and servo drive. The inverter must be connected to the variable frequency motor. In general, the frequency range of the variable frequency motor is limited, not to mention the accuracy; the servo motor has encoder feedback, the accuracy is much stronger than the inverter motor, and the control principle is the same as the inverter. Incidentally, the stepper motor is more cost-effective for angle control. Frequency conversion, servo, and stepping have their own strengths. Closed-loop adjustment of flow rate control for precise current carrying capacity. Independent of the speed control of the frequency converter. Because the speed control of the inverter is used as an inner loop in this system, the control accuracy is always determined by the outer loop. The inner ring is just a follow-up.