By using the frequency and speedmodulation technology, the electricity consumed will vary with the amount of the wind, thus a remarkable energy-saving result is achieved.
变频调速技术通过改变电动机工作电源频率调节电机转速，消耗的电能随风量大小而变，具有显著的节能效果。
2
Structure and the working process of a remote control vehicle for target towing were presented. Methods of control in automatic gear shifting and engine speedmodulation were described.
Even if the belt conveyor speedmodulation, due to the transport characteristics of the belt conveyor and safety requirements, belt conveyor is still maintained at constant speed running state.