What is the difference between a motor without speed regulation and one with variable frequency control? ? ?
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What is the difference between a motor without speed regulation and one with variable frequency control? ? ? Which one is better: cost-saving and energy-efficient?
Before inverters became widespread, mechanical differential (sliding-piston) speed control methods were commonly used to achieve stepless speed regulation. After the adoption of inverter technology, and especially in recent years as the price of inverters has dropped significantly, inverter-based speed control has become the mainstream approach. In terms of operation, maintenance, and installation costs, inverters are relatively more advantageous; however, they cause significant high-frequency interference to the power grid. Mechanical stepless speed control can avoid such drawbacks, but since it is a mechanical system, it is complex in structure. Nowadays, it is not common to see this method being used on a wide scale. I’m not sure if this is what the original poster is referring to. .