低频调制 meaning in English
low frequency modulation
low-frequency modulation
Examples
- Mechanism of the influence of low frequency modulating magnetic field on brain wave rhythm
低频调制磁场对脑电节律的影响机理 - The low - frequency slot harmonic modulation is used to weaken the end effect or decrease the wave of the thrust , and the many projects are designed or the better project is selected
采用齿谐波低频调制的设计方法，来削弱直线电机固有的端部效应，使推力的波动减小，并进行了多方案计算，得出比较好的设计方案。 - Firstly , the low frequency vibration of benfield frame is analyzed and tested . the nature and reason of the vibration of benfield frame are analyzed . a modulation theory is suggested and displayed to explain the low frequency vibration reason of benfield frame
文章首先分析和测试了苯菲尔框架的低频振动，分析了苯菲尔框架大幅低频振动的性质和原因，提出了造成框架振动的低频调制理论。 - The more poles mode , the unequal pole width mode ; the low - frequency slot harmonic modulation mode and the mode of changing end magnetic conductance are presented , and these designing method can efficiently weaken the end effect and decrease the wave of the thrust
提出的采用多极电机方式；初级与次级极距不等的方式；齿谐波低频调制方式和改变电机两端部磁导的方式等电机的设计原则和方法，都可有效地削弱端部效应，减小推力的波动。 - The second , at the high frequency primary coil , when switch turn on with control signal ( the spwm pulse is modulated ) , in the positive or negative semi - period of low frequency modulation signal , transformer coil with same direction voltage . the magnetic flux of transformer core will increase step by step . at the end , it leads to magnetic flux saturation
二、在高频变压器原边，当开关管接收控制信号脉冲列(经调制的spwm波列)导通时，在低频调制信号的正半周或负半周内，施加在变压器绕组上的是同一方向的电压，变压器磁芯中的磁通可能将级进地逐渐增加，导致磁芯饱和，造成磁偏或单向磁化，导致低频电信号放大失真或由于很大的磁化电流而无法正常工作。