就调速性能而言,直流电机虽然比较优越,但其设备复杂,耗费较大,故大多数起重机仍采用比较简单的交流绕线式异步电动机,使其转子绕组串接不同电阻调速,这种交流电动机用在静阻力负载的平移机构上调速,一般来说问题还不大。但如用在提升机构或其他位能 In terms of speed performance, although the DC motor is superior, but its equipment is complex, costly, so most cranes still use a relatively simple AC wound induction motor, the rotor winding connected in series with different resistance speed control, which AC motor used in the static load resistance of the translation mechanism on the speed, in general, the problem is not large. But if used to lift the body or other bits of energy