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在现代的工业中有许多的机器是在变载荷与超载荷的条件下工作。如轧钢机,偏心压力机,粉碎机,电锯等等。这些机器的转动多是由短路转子的具步电动机来带动,但是,这些机器如用刚性联轴节与电动机联接时,则电动机的起动力矩往往能达到额定力矩的2.5倍。除此之外,为了加快重型机器的旋转需要很长的起动时间,因而能把电机烧坏。为了解决上述问题,往往是采用增大电机的功率和提高零件的强度来承受过载,这样做往往是不合理的,因为这样要增大传动部分的重量,尺寸以及成本,另外对于实际所传送的扭矩也很难求出,甚至完全不可能求出。
There are many machines in modern industry that work under variable load and overloaded conditions. Such as rolling mills, eccentric presses, shredders, chainsaws and more. The rotation of these machines is mostly driven by the stepping motor of the short-circuited rotor. However, when these machines are connected to the motor with rigid coupling, the starting torque of the motor can often reach 2.5 times of the rated torque. In addition, the motor can burn out in order to speed up the rotation of the heavy machine, which takes a long time to start up. In order to solve the above problems, it is often unreasonable to increase the power of the motor and increase the strength of the parts to overload. In this case, it is necessary to increase the weight, size and cost of the transmission parts. In addition, Torque is hard to find, or even impossible to find.