电动葫芦属于轻型起重设备，它能够反复多次短时间运行，并且作业环境比较复杂，因此为了保证电动葫芦能够正常工作，作为主要动力来源的电机应具备以下条件： Electric hoist is light lifting equipment, it can be run repeatedly for short periods of time, and the working environment is more complex, so in order to guarantee the normal work of the electric hoist can, as a major source of power of motor should meet the following conditions: 　　1、电动葫芦电机应比普通工业电机有更强断续周期工作特性。 Electric hoist motor should be more than ordinary industrial motor. 　　2、电动葫芦电机应具有良好的起升转矩和过载能力。 Electric gourd motor should have good lifting torque and overload ability. 　　3、电动葫芦电机应具备更小的转子转动惯量，更大的转子长径比，更少的视线制动。 The electric gourd motor should have smaller rotor inertia, larger rotor length ratio, less line-of-sight braking. 　　4、电动葫芦电机的最大安全转速是额定转速的数倍，一般情况下是同步转速的2.5倍左右。 The maximum safe speed of electric gourd motors is several times the rated speed, which is about 2.5 times the synchronous speed. 　　5、电动葫芦电机应能适应不同的工作温度和湿度，并且最低具有2个等级一样的绝缘等级。 Electric gourd motor should be able to adjust to different working temperature and humidity, and have the lowest insulation level of two grades.