此种方法改变电动机的输入功率。

This method changes the input power of the motor.

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电动机的输入功率是多少？

What is the power delivered to the motor?

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电动机输入功率和水泵轴功率测试是泵站现场测试的重要内容。

The input power of motor and shaft power of pump are key measurements in field test of pumping stations.

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讨论了游梁抽油机的变动载荷对电动机的电流、输入功率、效率和功率因数的影响，给出了计算公式。

The influence of variable load on a beam pumping unit on the electric current, input power, efficiency and power factor of the electric motor is discussed, and relevant calculating formulae are given.

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讨论了游梁抽油机的变动载荷对电动机的电流、输入功率、效率和功率因数的影响，给出了计算公式。

The influence of variable load on a beam pumping unit on the electric current, input power, efficiency and power factor of the electric motor is discussed, and relevant calculating formulae are given.

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