The SVPWM algorithm keeps the switching frequency constant.
SVPWM算法保证了逆变器的开关频率恒定。
Keeping slip frequency constant we can get nearly constant torque output characteristic.
维持滑差频率不变，就可获得近似于恒定转矩的输出特性。
The stator flux-oriented vector controlling strategies of keeping stator frequency constant and capturing the maximum wind power are verified by experiment results.
实验结果验证了定子磁链定向的矢量控制策略既能保证定子输出频率恒定，又能较好地跟踪风力机的最大功率输出。
For example: Diving deep-well pump or pump water directly from the ground floor of the boiler heating system users frequency constant pressure replenishment system.
例如：用深井泵或潜水泵直接从地下取水的用户供热系统锅炉变频定压补水系统。
The results indicate that the proposed controller is capable of maintaining the torque switching frequency constant and reducing the torque ripple, particularly at low speed.
结果表明提出的控制器可以保持开关频率恒定，并降低了转矩脉动，尤其在低速时。
On the basis of analyzing vibratory frequency control system of vibratory roller, the controller are designed and the plan of vibratory frequency constant control by PID are put forward.
在分析振动压路机振动频率控制系统的基础上，对控制器进行了设计，提出了采用PID控制实现振动频率恒定的方案。
This frequency depends on the fine-structure constant.
该频率取决于精细结构常数。
The TB register is incremented periodically with an implementation-dependent frequency, which may not be constant.
TB寄存器会以一种依赖于实现的频率周期性地增加，这个频率可能不是恒定的。
To determine how strong the alpha constant was in any given spot, the scientists measured the frequency at which electrons in various atoms would hop from one energy level to the next.
为了确定在任一给出的位置的alpha常数的强度，科学家们测量了不同原子的电子从一个能级跃迁到另一能级的频率。
Therefore it can be seen that it will "smooth" the "twice mains frequency DC" into a near constant DC voltage.
因此它可以把“两倍于电源频率的直流电”进行“平滑化处理”，成为一个接近恒定的直流电。
As these waves pound against the sea floor, they generate a constant vibration with a frequency of about ten millihertz, much too low for humans to hear but easily detectable with seismometers.
当这些压力波撞击海床时，会产生一种频率为0.01赫兹的连续振动，而对我们人类而言这个频率太低了，所以根本听不到，但却很容易被地震仪侦测到。
This article introduces the frequency speed constant pressure water supply system controlled by PLC, presenting its hardware structure, the design of PLC program and its application.
介绍了用PLC控制的变频调速恒压供水系统的基本原理，给出了系统的电气线路和PLC程序设计，并在实际中得到了应用。
The basic principle of frequency and constant voltage water supply is discussed, as well as its application in pump station.
初步讨论变频恒压供水的基本原理及其在泵站中的应用。
USES frequency conversion control system, can real time monitoring gas supply lines gas pressure, make the gas supply pipe gas pressure constant, improve the production efficiency and product quality.
采用变频控制系统后，可以实时监测供气管路中气体的压力，使供气管路中的气体的压力保持恒定，提高生产效率和产品质量；
We design a suit of aviation AC excitation generator system, it insures the output voltage is constant frequency and constant voltage.
我们设计了一套航空用交流励磁发电机系统，以保证输出电压恒频恒压。
This circuit is restricted to low frequency operation by the lamp time constant.
受灯泡的时间常数限制，本电路只能低频工作。
This results on a typical logarithmic frequency scale in a constant speed.
这样的结果对一个典型的对数频率范围在不断加快。
The paper discusses high frequency discharge with dielectric electrode, emphasizing on the basic issues relating to the influence of frequency, dielectric constant on discharge and impedance match.
本文对具有介质电极的高频放电进行了讨论，对频率、介电常数对放电的影响，阻抗匹配等基本问题进行了探讨。
The control signals of invertor are produced by space vector modulation to achieve a small torque ripple and constant switch frequency.
以空间矢量调制方法来获得逆变器的开关信号，实现了小的转矩脉动和恒定的开关频率。
The high power shaft alternator constant frequency systems developed by Siemens is introduced, which is suitable for large container ships.
介绍了西门子开发的大功率轴带交流发电机恒频供电装置，适用于大型集装箱船；
Suppose the speakers both emit a pure sinusoidal sound wave of constant frequency.
假定两个扬声器都发射恒定频率的纯正弦声波。
A variable speed constant frequency wind power generation system of doubly-fed induction generator based on converter excitation was described.
建立了基于变换器励磁的双馈感应电机的变速恒频风力发电功率控制系统的模型。
Two control ring work together to realize variable speed constant frequency.
运行时机组的两个控制环同时工作，实现变速恒频。
The decoupled control of active power and reactive power is a key technology of variable speed constant frequency (VSCF) wind energy generation system.
双馈发电机的有功和无功功率的解耦控制是变速恒频（VSCF）风力发电系统的关键技术。
The expressions of the mobility, the resonant frequency and the diffusion constant of kinks are found.
求出了扭结的迁移率、共振频率和扩散常数的表示式。
Based on the introduction of components and principle of work of frequency modulation system of constant frequency AC power supply, math model of frequency modulation system is established.
在介绍某型恒频交流电源频率调节系统的组成和工作原理的基础上，建立频率调节系统的数学模型。
The constant frequency hysteresis is adopted to keep switching frequency stable and improve the hysteretic control.
为了克服滞环控制的不足，串联侧采用恒频滞环来保持开关频率的稳定。
A new multi-threshold frequency domain constant false alarm rate detection algorithm for radar fuse was presented.
提出了一种新的雷达引信多门限频域恒虚警率检测算法。
A new multi-threshold frequency domain constant false alarm rate detection algorithm for radar fuse was presented.
提出了一种新的雷达引信多门限频域恒虚警率检测算法。
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