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- The speed system has two channels,makes the machine decouple,realizes the independent control of the excitation current and the torque current and gives the excellent performance. 双馈电机转子电流定向矢量控制调速系统完全分为两个通道,解除了双馈电机的内部耦合,实现电机的励磁电流与转距电流的分别控制,使双馈电机的调速性能优异。
- The curve of the relation between the amplitude of the ultrasonic wave and the excitation current of the electromagnetic field was obtained by experiments. 为此设计了确定最佳磁化强的试验方案,通过试验得到超声波幅值随电磁场激励电流的变化曲线。
- An ambient field aids the magnetization from the exciting current. 背景场加强了激励电流的磁化强度。
- Proof of distributed feedback was the tuning of the laser wavelength over 130°A by changing the grating period, and the absence of shift in wavelength with increasing excitation current. 存在分布反馈的证据是,改变光栅周期可使激光波长在130°A范围内变化以及波长不随激发电流的增大而移动。
- Second, power level: if the sensor is resistive the designer must ensure that the self-heating effects of excitation current flowing through the transducer do not adversely effect the measured results. 其次,功率水平:如果传感器有阻力,这个设计师必须保证励磁电流的自动加热作用流经这个传感器负面影响不影响被测量的结果。
- In AVR(Automatic Voltage Regulator)open-loop mode,the common automatic current sharing control of parallel switching power supply system may change the static excitation current greatly. It can only be used safely in AVR close-loop mode. 开关电源并联系统常用的自动均流控制方法在自动电压调节器AVR(Automatic Voltage Regulator)开环模式下会大幅改变励磁电流静态值,故只能安全用于AVR闭环模式下。
- The AD7711 is an ideal choice of converter for this application; it offers 24-bit resolution, an on-chip programmable gain amplifier and a pair of matched RTD excitation current sources. AD7711是交换器一个理想选择为这种应用;它提供24位分辨率,一个在芯片可编程式获取放大器和一对协调的RTD励磁电流来源。
- Through electromagnetic induction, excitation current is transferred from primary side to secondary side.Advantages are: high efficiency, simple fabricating technique, and quick demagnetization. 这种无刷励磁同步电机的励磁电流是通过电磁感应从旋转变压器的初级传递到次级的,故这种无刷励磁同步电机的效率高、制造工艺简单、成本较低、灭磁快。
- The performance of electrically excited synchronous motor(ESM) drive is directly influenced by the rotor excitation current control strategy of ESM. 目前电励磁同步电机直接转矩控制研究在中国还是一个空白,其转子上存在阻尼绕组,必然对电机的动态行为产生影响。
- The performance of electrically excited synchronous motor (ESM) drive is directly influenced by the rotor excitation current control strategy of ESM. 摘要同步电机转子励磁电流控制方式直接影响电机的运行特性。
- Since an ac-excitation source will reduce offset and drift effects, much smaller excitation currents can be used in many applications. 因为有交流励磁电源将减少漂移和抵消作用,在许多地方可以用较小励磁电流。
- A Test of the excitation current regulator 它励调节试验
- It is the key problem for studying the exciting current in the transformer under DC bias magnetization. 在直流偏磁条件下变压器励磁电流是研究变压器直流偏磁特性的关键。
- All 3S industries transformers are 100% tested for turns ratio, exciting current, phasing & hipot. 所有的工业级别变压器都经过回转比率、定相等100%25的测试。
- The development of brushless exciting is restricted by the difficulty of exciting current measurement and rotating rectifier faults monitoring. 无刷励磁系统中对励磁电流测量以及对旋转整流器故障监测困难是制约该励磁方式发展的一大障碍。
- The exciter current an exponential relationship with transmitted torque, torque by unit moment of inertia and viscous power loss. 励磁电流与传递力矩、单位转动惯量传递的力矩等成指数关系,与功率损耗成负指数关系。
- Perhaps his nerve is naturally too dull to admit of any excitation. 大概他的神经天生就很迟钝以至不容有任何刺激的余地。
- A silicon controlled rectifying chopper is used to control exciting current so as to adjust the output voltage of generator automatically. 利用可控硅斩波器控制励磁电流来自动调节发电机的输出电压。
- Demand is outstripping current production. 现在需求逐渐超过了生产能力。
- She broadcasts on current affairs. 她发表时事广播演说。