All this indicate that GEHP has good part load characteristic and fit for variable speed adjustment.
这说明燃气机热泵部分负荷特性好，可以很好的实现变速调节。
According to torque vs. speed characteristic of stepping motor, the higher startup speed is, the smaller startup torque is and then the worse the capability of driving load is.
从步进电机的矩-频特性可知，启动频率越高，启动转矩越小，带动负载的能力越差。
Against the heavy equipment load and complex operations characteristic, the spindle used vector control technology of ac frequency speed control; the car used advanced ac servo control technology.
针对该设备负载大、运行情况复杂等特点，主轴采用了交流变频调速矢量控制技术，小车采用了先进的交流伺服控制技术。
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