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armature current     
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  电枢电流
     The Load-balance Control Method for the DC-motor Unit Based on the Fuzzy Feedback of the Armature Current
     基于电枢电流模糊反馈原理的直流电机机组负荷均衡控制方法
短句来源
     The Influence of Armature Current Interruption on the Dynamic Characteristic of Thyristor-motor System
     电枢电流断续对可控硅——电动机系统动态品质的影响
短句来源
     The Monitoring Technical Reseach of the Temperature and Armature Current of Steel Mill Electric Machine
     轧钢电机温度和电枢电流监测技术的研究
短句来源
     Through simulating the armature current the running performance of the motor(RSM160L-6)designed is analyzed. The test is made proving that the REPMSM is 6.1% higher in efficiency and 18.7% higher in power factor than the homomorphous asynchronous motor.
     通过电枢电流轨迹仿真,分析电机的运行性能,最后用实验验证了RSM160L-6与同型号的感应电动机相比效率提高6.1%,功率因数提高18.7%。
短句来源
     With tracking armature current, compensation windings are fed with the current whose amplitude and phase can be adjusted to counteract the armature reaction, by the control of converter.
     它采用电枢电流跟踪,经由电力电子变换控制器,向发电机电枢内的一个补偿绕组注入可以调节相位和大小的电流,补偿任意负载下电枢电流所产生的去磁直轴电枢反应。
短句来源
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  电枢电流的
     The Fuzzy-PID control way was used to control position of DC torque motor, and the fuzzy control way was utilized to restrict the armature current of DC torque motor.
     此策略采用混合型FUZZY-PID方法以控制电动机的定位 ,采用纯 FUZZY方法以实现电动机电枢电流的保护 .
短句来源
     Influences of Armature current due to Counter EMF Shanghai Rectifier Factory
     反电势对电枢电流的影响
短句来源
     It is automatically passed neutral section through the control on up and down of armature current and the switch-on & off of main circuit breaker.
     通过控制电枢电流的升、降和主断路器的分、合完成机车自动过分相过程。
短句来源
     And commutation position of inverter must be adjusted according to the value of armature current. It's beneficial for the motor to provide most torque and less torque ripple.
     当电枢电流较大时,不能忽略电枢反应对最佳换向位置的影响,需要对变换器换向位置角进行调整来适应电枢电流的变化,以获得最大输出转矩和较优的转矩脉动性能。
短句来源
     Finally, the work principle of PWM power amplifier and the magnitude of armature current are analyzed. The slight vibration prosperity of motor in DC PWM servo system, and the effect of dead-zone of PWM control signal on the low velocity properties are discussed.
     最后分析了双极PWM 功率放大器的工作原理和电枢电流的大小和规律,探讨了PWM 伺服系统中电机的微振特性,以及PWM 延时死区对伺服系统低速性能的影响。
短句来源
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  定子电流
     This paper describes a current method of permanent magnet synchronous motors (PM motors) for high torque operation. In this control method , by controlling the current phase angle actively,the reluctance torque is used to produce the maximum torque per armature current.
     本文提出了一种提高永磁同步电机输出转矩的电流矢量控制方法,即通过实时控制定子电流矢量的相位角,充分利用磁阻转矩来使电机输出转矩达到最大值。
短句来源
  电枢
     The Load-balance Control Method for the DC-motor Unit Based on the Fuzzy Feedback of the Armature Current
     基于电枢电流模糊反馈原理的直流电机机组负荷均衡控制方法
短句来源
     The Influence of Armature Current Interruption on the Dynamic Characteristic of Thyristor-motor System
     电枢电流断续对可控硅——电动机系统动态品质的影响
短句来源
     The Monitoring Technical Reseach of the Temperature and Armature Current of Steel Mill Electric Machine
     轧钢电机温度和电枢电流监测技术的研究
短句来源
     On the basic of fundamental the dynamic model is realized. The voltage of armature, current,thrust and speed is analysed when it is starting. Also this motor is simulated by MATLAB and tested by the computer which is used to test permanent magnet linear synchronous motor.
     介绍了永磁直线电动机的基本结构,从其基本原理出发,建立了永磁直线同步电动机的动态模型,分析了永磁直线电动机在起动过程中的电枢电压、电流、推力及起动速度等,进行了MATLAB仿真和永磁直线同步电动机微机测试装置的测试,并对实验结果进行了分析。
短句来源
     Through simulating the armature current the running performance of the motor(RSM160L-6)designed is analyzed. The test is made proving that the REPMSM is 6.1% higher in efficiency and 18.7% higher in power factor than the homomorphous asynchronous motor.
     通过电枢电流轨迹仿真,分析电机的运行性能,最后用实验验证了RSM160L-6与同型号的感应电动机相比效率提高6.1%,功率因数提高18.7%。
短句来源
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      armature current
    For the dc drive considered, the controllers are a speed controller, an armature current controller and a flux (field current) controller.
          
    When a torque is applied, the armature current increases to 50 A, and the speed is 1200 rev/min.
          
    The stator is stationary and produces the magnetic flux, while the rotating armature or rotor contains the coils that carry the armature current.
          
    The speed control loop has inner current control loop to provide fast transient response as well as to limit the armature current.
          
    The magnetic field is resultant of the armature current flow.
          
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    In this paper, the blooming-mill main drive system excited by SCR hasbeen studied by theoretical analysis in combination with analog computersimulation. Emphasis is placed on the discussion on the relationship betweenthe static position error of armature current and the system parameters, whenthe electronic optimal principle is used to synthesize the armature currentloop and motor back electromotive force (emf) disturbance is neglected, and theaction on the system behaviour. The author's considerations...

    In this paper, the blooming-mill main drive system excited by SCR hasbeen studied by theoretical analysis in combination with analog computersimulation. Emphasis is placed on the discussion on the relationship betweenthe static position error of armature current and the system parameters, whenthe electronic optimal principle is used to synthesize the armature currentloop and motor back electromotive force (emf) disturbance is neglected, and theaction on the system behaviour. The author's considerations have been givento the synthesis and regulation of the system. The results in the paper arein accord with the actual regulating ones obtained.

    本文通过分析结合模拟计算机的仿真,研究了初轧机主传动可控硅励磁系统。文中着重讨论了按电子最佳调节综合电流环不计电动机反电势扰动影响引起的静态误差与系统参数的关系及对系统品质的影响,并就系统综合、调试等问题提出了看法。现场调试结果与本文结论一致。

    Influences of armature current due to counter emf of D. C. drivers of controlled silicon rectifer are stated. This paper describes the deviations of magnitude-frequency and phase-fre- quency characteristics under the operating conditions of: (1) neglecting the influence of armature current due to counter emf; (2) different electro-mag- netic time-constant Ta, (3) different mechanical-electrical time-constant Tm and (4) different cut-off frequency ω. This paper also suggests second-order optimal...

    Influences of armature current due to counter emf of D. C. drivers of controlled silicon rectifer are stated. This paper describes the deviations of magnitude-frequency and phase-fre- quency characteristics under the operating conditions of: (1) neglecting the influence of armature current due to counter emf; (2) different electro-mag- netic time-constant Ta, (3) different mechanical-electrical time-constant Tm and (4) different cut-off frequency ω. This paper also suggests second-order optimal parameter-correcting method as counter emf being considered.

    叙述可控硅直流传动中反电势对电枢电流的影响,描绘了忽略反电势对电枢电流影响时,在不同电磁时间常数T_α,机电时间常数T_M及截止频率ω时引起幅频及相频偏差,提出如考虑反电势影响时采用二阶最佳参数校正时补偿方法。

    A digital generator protection against the internal asymmetrical faults is discribed in this paper. The protection follows the principle of fault component. Its high sensitivity and reliability are completely not limited by external asymmetrical sources and the frequency change in the power system.In the event of any asymmetry in the armature current of a synchronous generator, a negative sequence component of current induces a second harmonic current in the field winding. On the other hand,...

    A digital generator protection against the internal asymmetrical faults is discribed in this paper. The protection follows the principle of fault component. Its high sensitivity and reliability are completely not limited by external asymmetrical sources and the frequency change in the power system.In the event of any asymmetry in the armature current of a synchronous generator, a negative sequence component of current induces a second harmonic current in the field winding. On the other hand, the negative sequence power produced by an internal asymmetrical fault will flow in the opposite direction with that produced by an external fault. According to this fact, a scheme for generator protection based on the transistor has been proposed [2] and is applied in large generators in China.A similar study based on a minicomputer has been developed [3]. But these schemes have some disadvantages: (1) A normal negative current provided by asymmetrical load in the power system will reduces the sensitivity of the protection. (2) 3-phase short circuit at the generator terminal will lead to wrong operation of negative power unit. In addition, it is possible that an error tripping is caused by the frequency change which appears when the generator starts and a serious external fault happens.In new principle, the fault component of a second harmonic component and negative sequence power are used as a basis ot measurenent. New criterious (eqs. (1)-(5)) proposed here make the protection to have higher sensitivity and not to lost even in starting process of the generator. In this paper high speed sequence filter (eq.(7)) and a method of automatically tracking The basic frequency are proposed by means of digital technique. To remove the error caused by DC decaying component to Fourier algorithm, a error function of decaying time constant T is derivated (eqs.(9), (10)) to determine the error form and error level. As s result, a naw correcting method has been found.The experiental device based on a 16 bit mitrocomputer has been set up and tests have been conducted on a dynamic simulating synchronous generator for various types of the internal and external faults. Resulte show that the device can operate correctly under fault conditions of two phase short circuit,turn to turn short circuit and broken winding within the stator of the generator.

    本文论述了用微型计算机实现发电机继电保护试验样机的研制工作。样机采用全故障分量原理,以转子二次谐波故障分量和定子负序功率故障分量的方向作为检测量,对发电机定子绕组中的不对称故障(包括匝间短路、两相短路和绕组断线故障)施行保护,并且完全不受外部负序功率和频率变化的影响。本文还扼要介绍了该装置的结构和动模试验的结果。

     
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