【变方比】

变方比

f-ratio

... f-ratio f 比；变方比 f-stop f 制光圈 f-zero f-zero 最高时速 ...

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短语

频率变化平方比 Frequency Change Square Ratio ; square ratio of variable frequency ; variation ratio of squared frequency

方差比变换 variance ratio transformation

频率平方变化比 ration of the changes of the square of frequency

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适当增大逆变器输出滤波电感，合理选择串联变压器原副方变比，或采用电压前馈控制技术为改善其滤波效果的三条有效措施。

Then, the filtering characteristic of the active power filter is analyzed. Three measures which can improve the filtering effect are gained: augmenting the filtering inductance properly;

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