Chapter6PWMTechniques PWM(PulseWidthModulation):通过对一系列脉冲的宽度进行调制，来等效的获得所需要的波形（含形状和幅值)。Themostwidelyusedcontroltechniqueinpowerelectronics(第3章直流斩波电路采用的就PWM技术；第4章的4.1斩控式调压电路和4.4矩阵式变频电路,第5章逆变电路都涉及到了。)2-60 6.1Basic...
PWM (Pulse Width Modulation)控制技术就是脉宽调制技术:即通过对一系列脉冲的宽度进行调制,来等效的获得所需要的波形(含形状和幅值)PWM Techniques3The most widely used control technique in power electronics4PWM控制的思想源于通信技术,全控型器件的发展使得实现PWM控制变得十分容易PWM技术的应用十分广泛,它使电力...
Among the different PWM techniques, sinusoidal and space vector PWM are very common. All the PWM techniques are also applicable to multilevel converters.Bimal K. BosePower Electronics & Motor DrivesB. K. Bose, "Chapter 4. Voltage-Fed Converters and PWM Techniques," in Power Electronics And ...
[1]ENG S C,ORUGANTIR,,LIANG Y C,ET AL. An automated algorrithm for Small signal of DC-DC power converters[J],IEEEtrans. on Power Electronics,1996,11(1):132-141 . [2]蔡宣三,龚绍文. 高频功率电子学. 北京 科学出版社 1993年5月. [3]LEE Y S ,et al. Use of SPICE in design of...
To improve EMC, some techniques are introduced and their effectiveness proved by simulation. Index Terms--Conducted, EMC, EMI, LISN, Switching Supply I. INTRODUCTION AST semiconductors make it possible to have high speed and high frequency switching in power electronics [1]. High speed switching ...
20、 V.T.;space vectors on theperformanceofPWMtechniquesforthreelevelinverters”, The 29th AnnualConference of theIEEE IndustrialElectronicsSociety,2003.IECON'03,Volume 3, 2-6 Nov.2003Page(s):2764 - 2770 Vol.36 Bueno, E.J.; Garcia, R.; Marron, M.; Urena, J.; Espinosa, F.; “ Modul...
CaUSetheseriousharmonicproblemofpowerquality,lowpowerfactor,andtoinputside,evenifresistanceloads,inputCan’tfeedbackpowercurrentisn’tsinusoidalwaveformandthepowerfactorisn’tupInthetounitypowerfactor.lightofthedisadvantageswhathasbeenmentioned.Pulse—widthtechniqueshaspowerinthisbeenadoptedfortheserectificationdevicesto...
Tab.2 Number of switching times of the cascade unit for three modulation techniques at different modulation degrees 4 实验结果 为了进一步验证基于控制载波自由度的改进CPS-PWM 策略的实际控制效果,搭建了级联七电平CHB型逆变器实验平台如图17所示,实验参数见表3。 图17 七电平CHB型逆变器实验平台Fig.17 Seven...
These converter circuitsare simple but the disadvantages are large distortion in line current and poor powerfactor. To combat these problems the PWM rectifier various power factor correction(PFC)techniques based on active wave shaping of the line current have beenproposed. The PWM rectifier offers ...
The technique of PWM in an inverter comprises of two signals. One signal is for the reference and the other will be the carrier. The pulse required for switching the mode of the inverter can be generated by the comparison among those two signals. There are various PWM techniques. ...