For the purpose of meeting high efficiency and premium efficiency motor tests, a set of static variable frequency power supply test system was researched and designed.

从满足高效和超高效电机的效率测试出发，研究和设计了一套基于静止变频电源的电机效率测试系统。

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This paper not only discusses all kinds of the loading forms and system efficiency of the life test bed for hydraulic elements, such as oil pump, oil motor and oil crock.

本文对油泵、油马达、油缸寿命试验台的各种加载形式及系统效率进行了分析，并导出了各种加载形式系统效率的一般表达式。

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In addition, the test method of the efficiency of the combination of motor-oil cylinder and the effect of power factor on efficiency is proposed.

此外，还给出了电机—油泵组合体的效率测试方法及功率因数对效率的影响。

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