A variable frequency motor refers to a motor whose temperature rise does not exceed the rated allowable value of the motor under standard environmental conditions, with 100% of the rated load and continuous operation within the range of 10% to 100% of the rated speed.

With the rapid development of power electronic technology and new semiconductor devices, the AC speed regulation technology has been continuously improved and improved, and the gradually improved frequency converter has been widely used in AC motors with its good output waveform and excellent performance-price ratio. For example: large electric motors and medium and small roller table motors for steel rolling in steel mills, traction motors for railways and urban rail transit, elevator motors, hoisting motors for container lifting equipment, motors for pumps and fans, compressors, and household appliances. Motors, etc. have successively used AC variable frequency speed regulation motors, and have achieved good results. The use of AC variable frequency speed regulation motor has significant advantages over DC speed regulation motor:

(1) It is easy to adjust the speed and save energy.

(2) The AC motor has simple structure, small size, small inertia, low cost, easy maintenance and durability.

(3) The capacity can be expanded to realize high speed and high voltage operation.

(4) Soft start and quick braking can be achieved.

(5) No sparks, explosion-proof, strong environmental adaptability.

YD2 SERIES VARIABLE POLE MULTI SPEED THREE-PHASEASYNCHRONOUS MOTOR