围绕多电平变换器，新型电路拓扑及相关调制策略层出不穷。
Novel topologies and modulation strategies concerning multilevel converters are emerging continuously.
对有害电流检测方法、新型UPFC的变换器的调制方法、新型UPFC直流侧电容电压的平衡控制方法等进行了深入研究。
The detecting techniques of harmful currents, the modulation methods of novel UPFC and the balancing control of capacitors voltage on DC link are studied thoroughly.
利用电压空间矢量脉宽调制(SVPWM)信号变换控制功率变换器各开关器件的导通占空比，实现异步电动机的速度调节。
Using space vector pulse-width modulation (SVPWM) signal transformation method, speed regulation of induction motor is implemented by controlling the duty ratio of every converter switch.
提出了一种新颖的多电平矩阵变换器，介绍了其拓扑结构、工作原理和空间矢量调制技术。
A novel multilevel matrix converter is proposed, and its topology configuration, operating principles and space vector modulation technique are introduced.
空间矢量脉宽调制和双向开关多步换流方式是矩阵式变换器的基本控制策略。
Space vector pulse width modulation(SVPWM) and multi-step commutation method of bi-directional switches are the basic control strategies of the matrix converter.
分析了带微分环节的电压滞环的变环宽的原理，指出带微分滞环控制的脉宽调制(PWM)变换器可作为理想的可控电压源。
The paper analyzed the voltage hysteresis with differentiation elements, and pointed out that the PWM converter with differentiation hysteresis controls can be used as the ideal voltage source.
双空间矢量调制两级协调控制能实现整流级零电流换流，极大地减少了开关损耗，提高了变换器的效率。
Double space vector modulation can realize zero current commutation of the rectifier side, greatly reduce the switch loss, and improve the efficiency of the converter.
研究了3-3矩阵变换器（MC）基于直接传递函数法控制的原理，推导出了基于直接传递函数调制的矩阵变换器的控制过程。
The principle of 3-3 matrix converter(MC) based on direct transfer function control is studied and the control process of the matrix converter based on this control is deduced.
接下来，本文重点分析了基于矢量调制的组合控制策略，即将矩阵变换器的空间矢量脉宽调制和电动机转子磁场矢量控制有机结合的控制方法。
Next, the mix control strategy were analyzed in detail, which is the control method of combining the space vector pulse width modulation and the rotor magnetic filed directional control.
变换器中的电流大小和方向由相移脉宽调制方式控制。
The flow of current is controlled by phase shifted pulse width modulation.
针对矩阵变换器调制方式的特点，提出了基于输出电压误差函数分析的矩阵变换器离散调制技术，推导了基于时间离散和差分原理的电路方程。
Based on the output-voltage error function, a novel time-discrete modulation technique is proposed for matrix converters (MCs) and time-discrete difference equations of a MC circuit are derived.
导出了矩阵变换器的交-交直接变换控制规律和双空间矢量PWM调制策略，建立了交-交直接变换控制方式下矩阵变换器的数学模型。
The AC-AC direct transformation control and the double-space-vector PWM scheme of the matrix converter are deduced, mathematic model of space vector modulation (SVM) matrix converter is built.
对矩阵变换器的空间矢量调制法以及半自然两步换流技术进行了分析及阐述，同时研制了一套矩阵变换器样机。
Detailed analysis and description on space vector modulation and two-step commutation were given, and a prototype matrix converter was built.
根据单元级联多电平变换器拓扑结构及其脉宽调制技术的特点，以数字信号处理器和复杂可编程逻辑器件为核心，设计了多电平变换器的控制器。
On the basis of topology of cascaded multilevel convertor and its PWM technique, designed the controller of multilevel convertor at the core of DSP and CPLD.
系统采用间接矢量控制技术，通过高频交流脉冲密度调制接口变换器，对功率进行协调控制。
The suggested system makes use of a single phase HFAC pulse density modulation(PDM) converter as the interface to connect energy storage unit and power source for induction motor drive system.
这种调制方法使用基于人工智能优化算法产生脉冲信号的调制方法，对大功率三相PWM变换器进行谐波优化。
This modulation control method applies modern heuristic optimization technique to generate PWM signals which can achieve harmonic optimization of three phase high power PWM converters.
分析了传统矩阵变换器空间矢量调制策略，提出一种新型的矩阵变换器电流控制策略。
A current control strategy of matrix converter based on conventional space vector control is proposed.
探讨了混沌频率调制技术在开关变换器中抑制电磁干扰的实际效果。
The paper presents the effectiveness of EMI suppression of switching converters with a chaotic frequency modulation scheme (CFMS).
最后分析了采用单片机和D/A变换器实现的QAM调制解调方法。
The QAM modulation based on single chip computer and A/D converter is finally presented.
结合矩阵变换器双空间矢量调制方法，并将矩阵变换器过调制方法用于感应电机直接转矩控制中，达到矩阵变换器开关频率恒定和电机快速转矩响应的目的。
Double space vector modulation and overmodulation of matrix converter were proposed in this paper to ensure the matrix converter switching frequency to be fixed and fast dynam-ic torque response.
论文研究了混沌调制技术在实用开关变换器中抑制电磁干扰的效果。
The effect of EMI suppression of the chaotic modulation schemes is presented in the switching converters.
将PARK变换引入到空间矢量调制矩阵变换器中，建立了矩阵变换器的线性定常电路模型。
The linear time invariant equivalent circuit model is established by introducing the PARK transformation to the space vector modulated matrix converter.
该系统由数字控制器、脉宽调制波形显示电路、全桥变换器、直流电动机和光电编码器。
The system consists of a digital control system, a PWM control waveform display, a full-bridge converter, a DC motor and load motor.
在非对称输入电压情况下，对基于双空间矢量调制的矩阵变换器的输出电压波形进行了分析，提出了利用时变调制比改善输出电压波形的方法。
The output voltage waveforms of matrix converter which is based on the space vector modulation are analysed under the unbalanced input voltage. A time-variant modulation ratio method is proposed.
电力变换器主电路部（3），其根据该脉冲宽度调制波对开关元件进行驱动，将直流电压转换为三相交流电压；
A power converter circuit (3) drives a switching device by the pulse-width modulated wave for converting a direct current into the three phase alternating current.
电力变换器主电路部（3），其根据该脉冲宽度调制波对开关元件进行驱动，将直流电压转换为三相交流电压；
A power converter circuit (3) drives a switching device by the pulse-width modulated wave for converting a direct current into the three phase alternating current.
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