The YVF2 series variable frequency speed regulation three-phase asynchronous motor is a new generation of variable frequency speed regulation motor developed to meet market demand. It has the advantages of low noise, small vibration, wide speed range, easy maintenance, and reliable operation. This series of motors adopts a specially designed electromagnetic scheme and reasonable matching of stator and rotor slots to adapt to the power supply of the frequency converter. To ensure constant torque output of the motor at low speeds and maintain a certain overload capacity at high frequencies. This series of motors uses high-performance electromagnetic wires and insulation materials, reliable impregnation process and detection measures, making the motors highly adaptable to overvoltage caused by high-frequency carrier waves in frequency converters. The YVF2 series variable frequency speed control motor adopts independent fan cooling to ensure that the temperature rise of the motor does not exceed the allowable value during low-speed long-term operation. The YVF2 series motor adopts a parallel heat dissipation rib structure, which has a large heat dissipation area and a beautiful appearance. The corresponding relationship between installation dimensions and power, as well as the main performance indicators (4-pole) of the YVF2 series motor, comply with the relevant provisions of the latest national standard (Technical Conditions for Three phase Asynchronous Motors for Variable Frequency Speed Control). Except for the axial length and external dimensions, the installation dimensions are the same as those of the Y2 series motor, making it easy to select, install, maintain, and exchange. The YVF2 series motor can be conveniently installed with braking devices, encoders, and speed measuring machines to achieve fast braking and automatic control. The YVF2 series variable frequency speed regulation three-phase asynchronous motor is widely used for regulating flow in fans and water pumps, as well as for constant torque (below the fundamental frequency) and constant power (above the fundamental frequency) speed regulation in industries such as machine tools, textiles, chemical metallurgy, and steel. And it can meet the needs of special fields such as papermaking, cables, plastics, packaging, elevators, and lifting.