1) Low switching frequency
低开关频率
1.
For solving the cross-coupling problem caused by low switching frequency a new closed-loop variable speed control system which is based on flux trajectory control and different from vector control was introduced.
为加大中压变频器出力,要求降低开关频率,这就带来了PWM波形谐波大的问题。
2) low frequency switch
低频开关
1.
When average current control method is applied to the single-phase dc side series active power filter, the input current distortion is serious during low frequency switch turns on or turns off transient.
当单相直流侧串联型有源电力滤波器采用平均电流控制方法时,输入电流在低频开关切换点存在畸变。
3) switch frequency
开关频率
1.
Selection of switch frequency in direct current electromotor PWM modulation.;
极压仪中直流电动机PWM调速下开关频率的选取
2.
The DC-DC convertor features high switch frequency up to 1MHz using ultra-small inductors and ceramic capacitors.
应用PWM设计高可靠DC-DC变换器,其开关频率更高,可达1 MHz,这样减小了储能元件的尺寸,可采用陶瓷电容器,提高系统的可靠性,降低了成本。
3.
The reason of output current distortion is analyzed;and a new way to resolve the problem is put forward;it is controlling switch frequency changing in different sections according to system run state.
分析了引起输出电流畸变的原因,并提出可根据系统工况分段控制开关频率的方法来解决由这些原因引起的输出电流畸变。
4) switching frequency
开关频率
1.
Selection of phase-shift SPWM switching frequency
载波移相SPWM开关频率的选取
2.
Hysteresis control has disadvantage of unstable switching frequency.
滞环控制方法存在开关频率变化不定的缺点。
3.
To reduce the switching frequency and current error of a static synchronous compensator (STATCOM) for reactive power compensation, a novel direct current control strategy is proposed.
提出一种适用于STATCOM的直接电流控制新方法以减小开关频率和电流跟踪误差。
5) low threshold switching power
低阈值开关功率
6) random pulse width modulation
随机开关频率PWM
补充资料：低频
1.指应用于某一技术领域中的最低频率范围。例如，无线电波段中，将30～300千赫范围内的频率称低频;电子放大电路中，将接近音频(20赫兹～2万赫兹)的频率称为低频。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条