查询词典 ripple current

The papers emphases are two aspects: One is reducing the torque ripple using advanced control methods and the other is the research of the speed sensor-less schemes.

本文主要围绕采用先进控制方法抑制转矩脉动和直接转矩无速度传感器算法两方面来进行。

The induction motor stator-flux-oriented vector control scheme not only reduces the big dependence of its performances on the rotor parameters, such as in the rotor-flux-oriented vector control, but also eliminates the torque ripple produced by Bang-Bang control in Direct Torque Control. So the SFO vector control is a high-performance and robust induction motor control scheme.

异步电机按定子磁场定向的矢量控制克服了按转子磁场定向的矢量控制系统对转子参数的依赖性，又没有直接转矩控制中的砰—砰控制带来的转矩脉动，是一种鲁棒性良好的高性能异步电机控制策略。

On the base of the mathematic model of the PMSM, the reasons of the torque pulsation are analyzed. Then the validity of Iterative Learning Control in torque ripple minimization is expatiated. A whole simulation model is developed using SIMPOWER, and the effective of ILC in torque suppressing is proved. The scheme for hardware and software of integrated PMSM are demonstrated in the thesis.

本文在永磁同步电机数学模型的基础上，总结分析了永磁同步电机转矩脉动产生的原因，引入迭代学习控制抑制转矩脉动，利用SIMPOWER工具箱建立了永磁同步电机控制系统的仿真模型，对PMSM控制系统进行了仿真，仿真结果证明迭代学习控制能有效地抑制转矩脉动。

According to the linear-modeling of the PLL, the bandwidth should be large to achieve fast locking and be small to reduce the ripple on the control voltage while the whole loop is near or in the state of lock.

因此设计适合条件的线性模式锁相回路，须设计较大的频宽使其能快速锁定电路，并在锁相回路整体回路接近锁定状态时使影响振荡器输入电压控制线之扰动减少。

The analysis, simulation and experimental results show that MPT control technique has much faster transient response than traditional PWM control technique and much lower output voltage ripple than the pulse train control technique.

研究结果表明，MPT控制变换器比传统PWM控制变换器瞬态性能更好

The vibrations can be effectively suppressed under various operation modes, including chopping control and single pulse control, by adopting the novel control strategy. Furthermore, the novel control strategy minimizes the torque ripple under the torque chopping control.

采用新的控制策略，在斩波控制和单脉冲控制下，振动都可得到有效抑止，且新控制策略可在转矩斩波控制下减小转矩脉动。

Fast locking time, low jitter performance and low power consumption are required in nearly all PLL applications in modem IC systems. Thus the design of PLL must generally deal with a tight tradeoff between the locking time and the amplitude of the ripple on the control line of oscillator.

在大多数单晶片系统环境设计中锁相回路其快速锁定时间与低抖动值效能和低功率消耗等值为重要的设计要点，然而锁定时间与主要影响振荡器输入电压控制线之振幅扰动的是相互的彼此限制影响。

The pump eliminates the effect of channel-length modulation and makes the charging and discharging currents match perfectly in a wide output range to minimize the ripple of the control voltage.

该电荷泵结构可以很好地克服沟道长度调制效应的影响，使充放电电流在宽输出电压范围内实现精确匹配，从而使频率综合器的压控电压纹波很小。

Firstly, this paper introduced the basic concepts about interharmonic, including definitions, hazards and limited values. Then main interharmonic sources were shown, such as converter devices, inductive motors, arc furnaces, rolling mills and ripple control signals.

本文主要内容如下：(1)本文综述了对间谐波的认识，其中包括定义、危害和限值等，并结合实际经验，详细介绍了每一种间谐波源：变频装置、感应电机、电弧炉、轧钢机和音频控制信号。

With the id￠=0 vector control and the feedforward compensation of cogging, the minimum force ripple and maximum efficiency control of non-sinusoidal BEMF SPM motors can be obtained.

考虑永磁磁链谐波对永磁磁链导数矢量幅值及相位的影响，通过引入d￠q￠轴坐标系，提出一种id￠=0的非正弦波BEMF SPM电机矢量控制新方法，结合齿槽前馈补偿可以实现非正弦BEMF SPM电机的最小推力纹波最大效率控制。

Anna: No, I've got a hangover.

不是，我昨晚宿醉了。

We head into the mountains in Su's new Land Cruiser, stop for lunch at a scenic restaurant and then hang around drinking beer and eating fruit as two of his employees attempt to lure the birds with a tape recording of the fowl's mating call.

我们坐上苏的巡逻车向山顶出发，在一家风景优美的餐馆吃了中饭。然后我们喝着啤酒吃着水果四处逛。