软件设计中采用了换相转矩脉动抑制方法。
In software, the method of reducing commutation torque pulsation is brought into effect.
最大换相频率超出。
在特高压直流输电中换相失败也是主要的故障。
Commutation failure is one of the most common failures for the high voltage direct current transmission system.
换相电抗是高压直流输电系统中的一项重要技术参数。
Commutated reactance is an important parameter in HVDC transmission system.
本文介绍了用单层绕组和换相法设计远极比变极电机的方法。
The paper presents a method to design wide-ratio pole-changing motor by using single-layer winding and phase changing.
为了抑制电流换相期间的浪涌电压，逆变器采用最佳相角控制。
The inverter uses opetimal phase angle control scheme to suppress the surge voltage during the commutation of current.
介绍了人工心脏轴流式血泵永磁无刷直流电机换相转矩脉动变化过程。
This paper introduces Commutation torque ripple process of the axial blood pump of an artificial heart brushless DC motor.
本文还从技术及经济角度出发给出了几点电容换相换流器数值选取的建议。
Moreover, several recommendations on the selection of commutated capacitor's size were presented considering the technological and commercial factors.
直流电弧炉用整流变压器漏抗值设计较一般电力变压器大，整流器换相时间延长。
Because leakage inductance value of rectiformer used in DC EAF is larger than common power transformer, the rectifier has longer commutation time.
主要对永磁无刷直流电动机换相过程进行理论分析，得到引起换相转矩脉动的原因。
The cause of producing the commutation torque ripple was mainly found by means of analyzing the commutation process of permanent magnet brushless DC motor in theory.
旨在说明直流无刷电机控制器对电动机转速控制以及换相控制的实现方法和技术优势。
The main purpose is to illustrate the solution and technology advantages of DC brushless controller, in account of rotational speed control and phasing rotation control function.
分析了永磁无刷直流电机换相原理，提出了一种换相电流预测控制方法以抑制换相转矩脉动。
A commutation current prediction control scheme was proposed in brushless DC motor (BLDCM) to suppress the commutation torque ripples.
对绕组换相时电流波动进行了分析，并计算了电机电磁转矩，给出了抑制电磁转矩脉动的方法。
Current fluctuation is analyzed during coil commutation time and electromagnetic torque is computed and method is given to restrain ripple of electromagnetic torque.
直流换流器熄弧角是直流输电系统的重要电气量，常被用于判断直流输电系统逆变器的换相失败。
The extinction angle of the DC converter, which is usually used to study the commutation failure of the DC inverter, is an important parameter in the DC transmittal system.
永磁无刷伺服电机的换相和控制都需要准确的转子位置信息，然而位置传感器有其难以克服的缺点。
The exact rotor position is required while a permanent magnet brushless servo motor (PMBSM) is under commutation and control. Howere, position sensors have some fatal defects.
同时，着重对电流换相时所引起的转矩脉动进行了研究，发现采用重叠换相技术可减小这种转矩脉动。
At the same time torque pulsation in circuit commutation is analyzed and researched chiefly, and overlapping commutation technology is offered in order to reduce this torque pulsation.
虽然无刷直流电机具有良好的启动和调速性能，但是由于换相以及电枢反应等因素，它属于非线性系统。
The brushless DC motor has excellent characteristics of good start and timing performance, but it is a nonlinear system owing to commutation process and armature reaction.
在本文的计算过程中考虑了在交流励磁系统中存在着电枢反应和整流换相压降，故使计算结果更加真实可靠。
The armature response existed in AC exciting system and changing-phase voltage during the rectification are considered in the thesis, so the result is more reliable.
通过将换相失败的原理与实际的试验现象相结合，分析了整个事故原因，并对事故解决方法进行了描述和解释。
Combining the principle of commutation fault with real test phenomena, the reasons of the whole incident are analyzed, and the method to deal with this accident is described and explained.
所设计的无刷直流电机稳速控制系统用电机控制专用芯片ML4428实现了反电势的检测、换相和功率驱动；
Using the motor control special chip ML4428, the counter electromotive force detection and back-EMF commutation were realized.
在简要介绍直流接地过流保护原理的基础上，分析了换流变阀侧接地故障的故障特征以及换流阀换相过程对故障电流的影响。
By employing the DC earthed protection theory, this paper analyzes the characteristics of the converter transformer earth fault and the influence of converter commutation.
系统的设计除了硬件还需要软件来支撑，软件设计包括系统整体流程图、油门位置检测图和步进电机换相及角度细分流程图。
Next is software design of the system, including overall system flow chart, throttle position detection map and the step motor commutation and the point of sub-flow chart.
分析了传统的PWM_ON调制方式对无刷直流电动机在非换相期间由于截止相的反并联二极管续流而导致转矩脉动的原因。
The torque ripple caused by diode freewheeling of the inactive phase during non-commutation state of PM brushless DC motor(BLDCM)when using the PWM_ON type of pulse width modulation was analyzed.
介绍了无刷直流电机控制系统中的四种PWM调制方式，详细分析了四种不同的调制方式对无刷直流电机换相转矩脉动的影响。
Four PWM modes used in the brushless DC motor control system are introduced and their different influences on the commutation torque ripple of BLDC motors are analyzed in detail.
作者通过对实际系统的分析和动态模拟试验的验证，对其由于换相及电枢反应引起的输出电压降低作了较为详尽的、定量的分析。
The author evaluated the output voltage drop owing to the commutative process and armature reaction in detail by means of the analysis of the existent system and the dynamic simulation experiments.
作者通过对实际系统的分析和动态模拟试验的验证，对其由于换相及电枢反应引起的输出电压降低作了较为详尽的、定量的分析。
The author evaluated the output voltage drop owing to the commutative process and armature reaction in detail by means of the analysis of the existent system and the dynamic simulation experiments.
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