Why does the speed control accuracy of variable-frequency motors exceed that of asynchronous motors?
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When both variable-frequency motors and asynchronous motors are driven by frequency converters, the speed control accuracy of variable-frequency motors is higher than that of asynchronous motors. Experts, why is this? What are the structural differences between variable-frequency motors and asynchronous motors?
The main difference between current frequency-conversion motor drives and conventional asynchronous motors lies in insulation strength and heat dissipation. Could what the original poster is referring to be an inverter-driven synchronous motor?
I am talking about variable-frequency asynchronous motors. Within their speed control range, these motors offer a much higher level of speed precision compared to ordinary asynchronous motors. Variable-frequency asynchronous motors can operate stably at 100 Hz, whereas ordinary asynchronous motors are prone to damage when operated at that frequency. I believe this is not only related to their insulation levels and heat dissipation; what I’ve mentioned above is likely related to their structure as well. I look forward to hearing everyone’s opinions.