In metal processing, textile, paper, rubber, chemicals and wire and cable industries, products often need to reel in the winding (set), there is a need to address the problem is how to reel in diameter from the beginning to The final stage of a gradual increase throughout, Tension and maintain the speed of change in the extent permitted by, in order to solve these problems, most of the mechanical structure to add a variety of auxiliary equipment or other transmission system in order to achieve, but the results often are less than expected, At the same time, there is still a complicated equipment at a cost, the use of maintenance difficulties, with the rapid development of China's industry and agriculture, high speed, excellent quality and raise the level of automation to make these issues more prominent.

YLJ, JLJ Series Torque Motor with its unique electrical properties, when the load increases, the shaft of the motor speed to automatically fall, so that the product at the time of winding tension remained basically unchanged, this is excellent coordination of the match, Therefore, this series can also be referred to as motor winding motor torque characteristics. Since the motor has a greater resistance, to block the electrical current is also smaller than the average, as well as the structure of the multi-purpose needs to adopt a form of forced ventilation, the long-term operation in the low-speed range even at a stall, And a simple structure, no brush, slip ring, commutator, and so on, with the use of asynchronous motor with the general maintenance of the advantages of simplicity.