its working principle is to change the output speed by adjusting the slip ratio of electromagnetic speed-regulating motor. It has low working efficiency and long response time. Variable frequency motor refers to squirrel-cage AC asynchronous motor, which is driven by inverter, and changes the speed and torque of motor by changing the output parameters of inverter. Inverter has the advantages of high efficiency, fast response and high control accuracy, and it is an ideal product for a new generation of motor speed regulation. frequency conversion motor is different from ordinary AC asynchronous motor, which.
the characteristics of AC stepless speed regulation motor are as follows: 1. AC stepless speed regulation, automatic regulation system with speed negative feedback, and the speed change rate is less than 3%. 2. Simple structure, convenient use and maintenance and low price. 3. No out-of-control area, wide speed regulation range, up to 1: 1. 4. Low control power, convenient manual control, automatic control and remote control, and wide application range. 5. Good starting performance, large starting torque and smooth starting. This is an old-fashioned product that date back to that 196s. There is also a JDS series controller whose principle is that it samples the speed frequency signal of the tachogenerator, and displays it with a digital meter after processing, so that users can accurately indicate the actual speed without calibrating the meter because of the sensitivity of the tachogenerator. This series of controllers has the functions of smooth soft start to prevent sudden jump and overshoot, and locked-rotor protection of electromagnetic clutch. Adopting PI control has the characteristics of high control precision, stable operation and good speed regulation performance. The signal control type realizes the manual-automatic two-way undisturbed switching. AC variable frequency speed regulation is a new technology rising in recent years, its price is higher than that of AC electromagnetic speed regulation, and its speed regulation performance is much better than that of AC electromagnetic speed regulation.