滤波器因数是用带宽的变化来定义滤波器的选择性，其含义是滤波器的幅频特性值为-60dB的带宽与-3dB的带宽之比。滤波器因数越小，表明滤波器的选择性越好
基于T型滤波器的调光方法，能在很窄的工作频率范围内实现深度调光，同时具有灯电流波峰因数低的优点。
Based on T type filter, the new ballast can achieve a wide dimming range with a very narrow frequency variation range, and it can operate with low lamp current crest factor.
每个梯形输入的加权因数与一个数字滤波器抽头系数对应。
Each ladder input's weighting factor corresponds to one of the digital filter tap coefficients.
在电气化铁道牵引变电站中，装设无功补偿电容器和谐波滤波器是提高功率因数、改善电能质量的重要手段。
In electric railway traction substation, power capacitors and harmonic filters are the important devices for improving both the power factor and the power quality.
应用推荐