In the present work, we propose an electrical propulsion system initiated on three phase IM so as to attain the desired speed and torque with less power loss. The induction motor is served from three phase inverter functioned by a constant V/F control method and Space Vector Pulse Width ...
AbstractThe high power three-level neutral point clamped (NPC) rectifier should reduce the switching frequency as much as possible while satisfying the harmonic current limit of the grid side, the neutral-point voltage balancing of the DC side and avoiding the phase voltage two-level jump (TLJ)....
As the three-phase-leg voltage cannot directly reflect the change of the reference grid current with the traditional decoupling control method, the grid-connected inverter has slow dynamic response. In order to solve the problems, the d - and q -axis components of the grid current in the ...
分析了SVPWM调制方案的原理，在此基础上得出了易于实现SVPWM的工程算法，并对其进行了详细分析。推导了从三相静止坐标系到dq旋转坐标系的变换方程，然后得到了相应的dq旋转尺度的供电系统的数学模型。逆变器由外侧电压环和内侧电流环组成的双环控制，通过分析控制器模型得出相应的PI控制参数。关键词：逆变器；SVPWM；三相...
On the basis of the principle analysis, the three phase open loop and closed loop inverter systems are built by using MATLAB/SIMULINK, and the three phase inverter simulation results are analyzed.On the basis of simulation, the hardware and software design of three-phase inverter with DSP chip...
对文献[4]中不对称结构进行扩展,提出一种新型三相不对称三电平四桥臂Z源逆变器如图1所示。 在逆变器的直流输入端与逆变桥之间引入一个Z源网络,直流侧上下电容电压可通过逆变器的上下直通来进行控制。其中C1=C2,L1=L2,UL1=UL2=UL,UC1=UC2=UC。直流电源电压为Udc。CS1=CS1=CS,故每只分压电容上的电压值为...
This circuit can ensure the safety of the inverter and the load by preventing the input singal to add to the inverter when the dead-time is too long or too short. Multisim simulation and experimental results demonstrate the effectiveness, and feasibility of the described protection measures.%基于...
Keywords:SVPWMmodulation;three-segmentalgorithm;three-phaseinverter;Simulinksimulation;THD 0引言 自20世纪80年代SVPWM调制技术被提出 [1] , 由于其优秀的性能,被广泛地应用在电气传动、电 力系统新能源、有源电力滤波器和静止无功发生器 中的三相逆变,受到了工程和学术界的重视,并被 ...
Up to this point, the research of three-phase converters has been heavily focused on inverter applications. Although most techniques developed in the inverter area can be used in PFC applications, a PFC circuit has its unique characteristics and, therefore, deserves some special treatment. The ...
three-levelinverterbasedonthespacevectorpulsewidthmodulation(SVPWM)areanalyzedandawayrecomposing thedrivingpulseaccordingtothephaseofcurrentforthedeadtimecompensationisprovided.Intheregionofnar- rowpulse,thebeginningvectorisrehandledtoavoidthenarrowpulse.TheMatlabsimulationandexperimentalresults provethefeasibilityofthe...