起重机起升马达性能的好坏,直接影响整机的工作效率,同时也关系到人身和机器的安全。起重机常用的高压自动控制变量马达,其起始排量为最小排量,输出转矩最小而转速最快,不能人为控制速度,难以满足多数机械慢速平稳启动的要求,尤其在作为起重机的起升马达时,当重物在空中停留后? Crane lift motor performance is good or bad, a direct impact on the work efficiency of the machine, but also relates to the safety of personal and machine. Crane commonly used high-pressure automatic control variable motor, the initial displacement for the minimum displacement, the minimum output torque and the fastest speed, can not be artificially controlled, it is difficult to meet the slow start of most mechanical slow start requirements, especially as a crane When lifting the motor, when the heavy object in the air to stay?