The saving energy control system is proposed for problem of oil drawing machine electric driver which efficiency and power factor is low.

针对抽油机电驱动装置效率和功率因数低、耗能严重的问题，研制了一台新型的抽油机节能控制系统。

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High efficiency of transformer is an important task of electric distribution equipment energy-saving.

变压器高效率化是变配电设备节能的重要课题。

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Electric bicycle with energy feed back by the use of DSP and permanent magnet synchronous motor (PMSM) has good foreground because of its energy-saving and high energy efficiency.

DSP控制同步电机并能实现能量回馈的电动助力车，由于其可以实现可逆能量的控制，具有节能高效的特点，有很好的发展前景。

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