1)  frequency ratio
频比
2)  constant U/f
恒压频比
1.
Then considers the induction motor and the inverter as a whole controlled object,which named as a variable frequency speed-regulating system in constant U/f.
本文讨论了水泵变频调速的节能原理,提出一种基于参数自调整模糊PID控制的交流闭环变频调速系统的设计方法,把变频器和感应电机组成的变频调速系统看成一个整体—恒压频比变频调速系统。
3)  coefficient of frequency ratio
频比系数
1.
Two new conceptions which are the coefficient of frequency ratio and the sensitive simple-harmonic wave of vibration of structure are proposed.
在此基础上提出了“频比系数”和“结构振动敏感谐波”2个概念。
4)  dual-frequency phase comparing
双频比相
1.
An algorithm of range based on group- frequency agile and dual-frequency phase comparing is proposed,which gains information of range using phase difference between echoes.
提出了采用基于双频比相和组频率捷变的测距算法,解决了测距精度与测距范围之间的矛盾。
5)  VVVF
恒压频比
1.
The traditional VVVF control schemes have the disadvantage of poor steady precision and the small output torque working in the low frequency ln this paper the scalar control scheme with the slip frequency compensation and the stator voltage dropping compensation is proposed,simulation and experiments validate the proposed scheme has good steady precision and high output torque.
传统的恒压频比控制存在稳态精度低、低频输出转矩小等缺点。
6)  frequency division ratio
分频比
参考词条
补充资料：比昂斯滕·比昂松
比昂斯滕·比昂松
比昂斯滕·比昂松

比昂斯滕·比昂松（1832～1910）挪威戏剧家、诗人、小说家。主要作品有剧作《皇帝》、《挑战的手套》，诗集《诗与歌》等。1903年作品《挑战的手套》获诺贝尔文学奖 。获奖理由： “他以诗人鲜活的灵感和难得的赤子之心，把作品写得雍容、华丽而又缤纷”。

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