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液压升降机电机发热怎么回事?

文章来源:www.trsjjx.com   发布时间:2015-1-22 16:53:58   浏览次数:

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液压升降机http://www.trsjjx.com/中电机作为一种数字式执行元件,在运动控制系统中得到广泛的应用。许多客户在使用液压升降机时,感觉电机工作时有较大的发热,实际上发热是电机的一个普遍现象,那么电机发热是怎么回事呢?
Hydraulic lift the motor as a digital actuator, has been widely used in motion control system. Many customers in the use of hydraulic lifts, electrical work when there is a greater feeling of fever, fever is a common phenomenon in fact, the motor, the motor heat is how it happened?

液压升降机http://www.trsjjx.com/电机内部都是由铁芯和绕组线圈组成的,绕组有电阻,通电会产生损耗,损耗大小与电阻和电流的平方成正比,这就是我们常说的铜损,如果电流不是标准的直流或正弦波,还会产生谐波损耗;铁心有磁滞涡流效应,在交变磁场中也会产生损耗,其大小与材料,电流,频率,电压有关,这叫铁损。铜损和铁损都会以发热的形式表现出来,从而影响电机的效率。电机一般追求定位精度和力矩输出,效率比较低,电流一般比较大,且谐波成分高,电流交变的频率也随转速而变化,因而液压升降机电机普遍存在发热情况,且情况比一般交流电机严重。
Hydraulic lifts are made inside the motor windings and core composed of windings resistance, power will produce losses, the loss is proportional to the square of the size and resistance and current, and this is what we often say that the copper loss, if the current is not a standard DC or sine wave, but also produce harmonic losses; vortex core has hysteresis effects in the alternating magnetic field will produce loss, its size and materials, current, frequency, voltage, called iron loss. Copper and iron losses will be manifested in the form of heat, thus affecting the efficiency of the motor. Motors are generally pursue positioning accuracy and torque output, efficiency is relatively low, the current generally larger, and high harmonic components, the frequency of the alternating current with the speed of change, and therefore the prevalence of fever cases hydraulic lift motors and AC motors than the general situation serious.
  

 

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