共模电压
- 网络Common Mode Voltage;Common-mode voltage;VCM;VCOM;CMV
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基于实验样机,编程实现了本文控制策略,并对双电压合成调制策略的抗干扰特性、控制信号窄脉冲的危害性、共模电压抑制的有效性等问题进行验证。
Based on the test platform , programs are designed , and the anti-interference characteristic of the two line voltage systhesis , the harmfulness of narrow pulse , and the availability of CMV suppression are proved .
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逆变器带上RC吸收回路及感性负载时,单边设置死区时正方向的负载电流使输出电压减小,负方向的负载电流使输出电压增加,从而影响了逆变器输出的共模电压。
When the inverter has RC snubbers and inductance load and adopts the asymmetric dead-time inserted mode , the forward load current makes the output voltage reduced and the negative-going load current makes the voltage raised . This may bring the change of the output CMV of the inverter .
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单相H桥逆变器中的抗共模电压测量系统
Measurement System Inhibiting Common-mode Voltage of the Single Phase H-bridge Inverter
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一种新颖的用于消除PWM逆变器输出共模电压的有源滤波器
A novel PWM inverter output active filter for common-mode voltage cancellation
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文中提出了一种新颖的可以有效消除脉冲宽度调制(PWM)逆变器产生的共模电压的有源滤波器。
This paper proposes a novel PWM inverter output active filter for common-mode voltage reduction .
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各种PWM控制方式下的电机共模电压比较研究
Study and Comparison of the Common-Mode Motor Voltage in Different Kinds of PWM Control Methods
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一种抑制NPC逆变器共模电压的新方法
A Novel Method for Suppressing Common-mode Voltage Caused by NPC Inverter
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减少共模电压的SVPWM优化调制方法研究
Research on a SVPWM Control Method for the Common-mode Voltage Reduction
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SPWM死区对三电平高压变频器共模电压的影响
Effects of SPWM Dead-time on Common-mode Voltage in Three-level High-voltage ASD System
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该两种SVM通过错时采样技术,平滑应用于级联型高压变频器,并可完全抑制其共模电压。
These two SVMs can be smoothly used in cascaded high-voltage inverter via staggered sampling time to completely eliminate common-mode voltage .
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而PWM调制技术的应用不可避免地会产生高频共模电压,对电气设备的运行会产生相当大的危害。
The use of PWM modulation technology will cause highfrequency common-mode voltage inevitably , which would be very dangerous to the electrical equipment .
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通过Matlab仿真,验证了理论分析的正确性,并进一步说明了,对采用同相调制算法的变频器,注入3次谐波将导致共模电压增加。
Simulations with Matlab prove the correctness of theoretic analysis and illuminate that the third-order harmonic injection into inverter controlled by in-phase modulation will increase common-mode voltage .
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变频器采用的空间矢量脉宽调制(SVPWM)会产生共模电压,后者对变频器和电机产生危害。
The inverter can generate common-mode voltage due to the space vector pulse width modulation ( SVPWM ) .
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高共模电压下4~20mA电流环路信号的拾取
Pick up 4 ~ 20mA Current Loop Signal under High Common-mode Voltage
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尤其在应用PWM变频器后,由于逆变器在电机定子绕组中产生高频的共模电压,使电机系统产生轴电压、轴电流,导致轴承被损坏,严重影响了电气拖动系统的安全性和可靠性。
The inverter generates high frequency common-model voltage , which leads to shaft voltage and bearing current and induces bearing failure . It affects the safety and reliability of the electrical drive system seriously .
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其具体的分析过程如下:首先,分析了PWM逆变器驱动异步电机共模电压的存在原理,等效高频振荡特性和振荡频率。
The specific analysis is as follows . Firstly , the theory of the common mode voltage at motor terminals and the high oscillation frequency characteristics of the common mode voltage have been analyzed .
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pWM逆变器在应用中会产生共模电压,共模电压在IGBT的高速开关期间产生充放电电流。
Pulse width modulated ( PWM ) inverter can generate common-mode voltage , which can produce charge-discharge current at the distant of every insulated gate bipolar transistor ( IGBT ) high-speed switching .
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最后,搭建了PWM变频供电电机拖动系统实验平台,进行共模电压和轴电压的测试,实验结果证明了本文所用研究方法的正确性。
The simulation results show that the new filter has good performance . Finally , the experimental platform of PWM inverter power supply motor drive system is built to measure shaft voltage and common mode voltage .
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传感器和信号地之间的共模电压VCM来自周围杂散电容耦合带来的噪声源。
VCM , the common-mode voltage between the sensor and the signal ground , results from nearby noise sources resulting from stray capacitive coupling .
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提出了一种消除PWM逆变器输出共模电压的前馈有源滤波器,包括无源共模电压检测网络,推挽电路以及四绕组共模变压器。
A novel feed-forward-type active filter , which consists of a passive common-mode voltage detection network , a push-pull circuit , and a four-winding transformer , is presented to eliminate common-mode voltage generated by a PWM inverter .
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在PWM电机驱动系统中,多电平逆变技术可以降低系统中的共模电压和谐波含量,但是由于开关频率是固定的,在开关频率处的谐波仍很大。
Applications of multilevel inverter can reduction of the common mode voltage and harmonic components in PWM motor drive systems . However , the harmonic component on switching frequency is still very high because of the fixed switching frequency .
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文章对三电平逆变器输出中的共模电压进行了分析,为了减小共模电压带来的危害,文中采用了两种SPWM控制策略即传统三电平SPWM控制策略和降低共模电压的三电平SPWM控制策略。
The common mode voltage for the output of three-level inverter is analyzed . To diminish the harm caused by the common mode voltage , two control strategies of SPWM are adopted .
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该文分析了PWM高压变频器中输出电缆对电机影响、共模电压和三电平逆变器箝位点电位不平衡机理。
The principle of the influence of a long output cable , the common-mode voltage in a PWM high-voltage adjustable speed drive ( ASD ) system and imbalanced potential of the clamp point of a three-level inverter have been analyzed respectively .
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为抑制由PWM逆变器输出的共模电压而导致电机轴承的损坏,提出了前馈有源滤波器。滤波器包括无源共模电压检测网络,推挽电路以及四绕组共模变压器。
Feed-Forward-Type active filter is proposed in this paper , which consists of a passive common-mode voltage detection network , a push-pull circuit , and a four-winding transformer to eliminate the negative effects of shaft voltage and bearing current in a PWM inverter drives .
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为有效减少共模电压和输出电缆对高压变频器的不良影响,提出了一种LRC滤波器拓扑结构,给出了滤波器各个参数选取原则。
For effectively eliminating the bad impact of the output cable , a topological structure of LRC filter is presented and its principle of parameter selection is given .
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仿真和实验结果验证了该滤波器可以显著地抑制电机端共模电压,从而减小了变频器输出的负面影响如轴电压,轴承电流等,延长了轴承的寿命,提高了PWM驱动系统的可靠性。
Simulation analysis and experimental results confirm the validity of the proposed filter that the common-mode voltage at motor terminal is eliminated almost completely and shaft voltage and bearing current are unobvious . It can contribute to enhance bearing life and improve reliability of PWM drive systems .
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研究了不同PWM控制方式下电机共模电压、轴电压和轴承电流的产生机理,建立了脉宽调制逆变器驱动系统共模回路的等效电路,并由此得到轴电压的计算公式。
This paper investigates the mechanism and form of the common-mode voltage , shaft voltage and bearing current in different kinds of PWM control methods , and sets up a common-mode equivalent circuit for PWM inverter drive system . Consequently , the formula of the shaft voltage is obtained .
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对三电平SVPWM简化算法及改进PWM调制方法、中点电位平衡控制策略和共模电压抑制策略进行实验验证,实验结果验证了整体算法和控制策略的可行性。
The improved method of carrier modulation which based on simple three-level SVPWM algorithm and the neutral point balancing methods and common-mode voltage reducing methods are applied in the experiments . The experiment results show the feasibility and effectiveness of the global algorithm and the control strategy .
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PWM逆变器直接驱动电机时会产生较高dv/dt的共模电压,并由此产生轴承电流和共模漏电流以及严重的电磁干扰(EMI)。
When motor was directly connected with PWM inverter , the common-mode voltage with a high dv / dt value would be brought which was thought to have relations with the producing of bearing current , common-mode leakage current , and serious electromagnetic interfere ( EMI ) issues .
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用于抑制矩阵变换器共模电压的零输出换相策略
The zero-output commutation strategy for reducing common-mode voltage of matrix converter