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- Under the corresponding suppositions, this paper puts forward to use the central limit theorem to compute the superposition of harmonic wave currents of multi-harmonic wave sources. 在相应假设条件下,提出应用中心极限定理计算同次多谐波源的谐波电流矢量叠加。
- Detriment of Neutral Conductor Harmonic Wave Current in Low-Pressure Hydropower Generator and its Prevention 低压水轮发电机中性线谐波电流的危害及防止
- harmonic wave current 谐波电流
- The harmonic wave of current, when single phase grounded fault happened, can’t be eliminated by mounting Petersen-coil.The damage of arc-grounding overvoltage appeared. 而在单相接地的残余电流中含有较大的高次谐波,是加装消弧线圈也无法消除的,这使得弧光接地过电压的危害凸显出来。
- Transient and surge are the instant aberrance of the voltage and electric current on the simple alternating current wave circuit. surge and harmonic wave are the main manifestation. 瞬变和浪涌是正弦交流波电路上电压与电流的一种瞬时态的畸变。浪涌、谐波为主要的表现形式。
- Examples about Prevention and Cure of the Harmonic Wave Disturb from the Transducer. 变频器谐波干扰防治实例。
- Application of step dynamic compensation and harmonic wave filtering system in Beiman Special Steel Co. 有级动态补偿及谐波滤波系统在北钢的应用。
- In the square wave current welding,the inductance is very important to influence the fomation of square wave A. 在方波交流焊中,电抗器的电感量对方波的形成及电弧的稳定性有着很大的影响。
- The prediction model of harmonic wave analysis includes inclinational item, periodical item and random item. 谐波分析法的预测模型包括趋势项、周期项和随机项;
- Supposition of two vibrations with same frequency and direction, condition generated mechanical wave, dynamic equation of plane harmonic wave. 同方相同频率的两个简谐振动的合成;机械波产生的条件;平面简谐行波的运动学方程。
- Detecting back EMF is one of the most important methods for the detection of rotor position in square wave current drive BLDCM sensorless control. 方波电流驱动的BLDC电机无位置传感器控制检测转子位置的最重要方法是反电动势检测法。
- The three harmonic wave(355nm) of a Q-switch yttrium-aluminium garner laser is directed into the microscope and focused by the objective. 工作波长355nm是由电子调Q Nd:YAG激光经KDP倍频和混频后得到的.
- In accordance with the familiar configuration for present lighting system,the common harm of harmonic wave and numerical values were showed here. 针对目前灯光系统设计中常见的配置情况,指出常见的谐波危害及相关数值的计算。
- Sine wave current subdividing technology not only overcomes the disadvantages of motor"s vibration and noise at low speeds but also reduces probability of resonance. 正弦电流细分技术基本上克服了传统步进电机低速振动大和噪音大的缺点,减小发生共振的几率。
- Then the feature and restraint of the harmonic waves of HVDC is also studied. 同时也对HVDC系统交直流侧谐波特征及抑制问题进行了研究。
- It is verified the time harmonic wave propagation consists of a incident wave and a reflected wave( even if by circuit theory of ABCD matrix of R, L, C). 验证传输线上各频率成份弦波电压及电流之沿线分布(路矩阵模式解)入射波与反射波所合成。
- Abstract: This paper analyzed the problem of harmonic wave, matching of load and calorification for inverters in running, and made the relatively the measure. 摘要:本文针对变频器运行过程中存在的谐波问题、负载匹配问题和发热问题,逐一进行了分析,并提出了相对应的解决方案。关键词:变频器谐波负载发热
- The principium of rate differential and second harmonic wave breaking are told emphasis.Some improving suggestions on this system are propounded according to some real problem. 重点介绍了比率差动及二次谐波制动的原理,并结合现场中遇到的一些问题提出了今后木系统装置需改进的一些意见。
- The pulse area modulation mode in the fields of high power factor convertor was applied to current source inverter,the lower harmonic waves in output current is effectively controlled. 把高功率因数变换器领域中所研究的脉冲面积调制法引入到电流逆变器的控制中,有效地抑制了输出电流中的低次谐波。
- The isolation structure that is acter on by harmonic wave and earthquake is simulated and analyzed in order to investigate the feasibility of the system. 对此隔震结构在简谐波和地震波作用下进行仿真、分析从而证明这个系统的可行性。