Use of Hybrid PWM and Passive Resonant Snubber for a Grid-Connected CSI

Li, R.T.H.; Chung, Henry Shu-Hung; Lau, Wing Cheong; Zhou, Bin

doi:10.1109/tpel.2009.2027122

Cited by 40 publications

(13 citation statements)

References 32 publications

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“…A flexible switching pattern based on SVPWM for grid-connected CSI control is discussed in [10]. A hybrid switching scheme that combines the advantages of unipolar switching scheme and bipolar switching scheme being applied to gridconnected current-source inverters is discussed in [11]. In high power motor drive application, a selective harmonic elimination (SHE) or a combined SHE and SVPWM are usually used for the CSI modulation, in order to minimize the dc-link current [12].…”

Section: Introductionmentioning

confidence: 99%

Induction Motor Control using SVPWM Quasi Z Source Current Fed Inverter

Sathish¹,

Ilango²

2019

International Journal of Innovative Research in Electrical, Ele

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This paper presents the simulation model for speed control of induction motor using SVPWM Quasi Z source inverter. Here the DC input voltage is boosted by using quasi Z network and the output of the quasi Z source network is applied to the three phase SVM based inverter. The variable voltage, variable frequency AC output of the inverter is used to control the speed of the induction motor. The simulation results with R load and induction motor load are considered for analysis. The three phase LC filter is suggested at the output to reduce the harmonics. The THD of SVM based drive system is compared with that of the SPWM inverter based system. The proposed system performance is tested using MATLAB/SIMULINK. IV. CONCLUSIONThe SVM based QZSI system with resistive load and induction motor load are designed, modelled and results are presented. The simulation results indicate that the output is higher with SVPWM based inverter system. The THD is as minimum as 4.9% in the proposed system. The advantages of the proposed system are reduced number of switches and reduced number of passive elements. The disadvantage is that the quasi Z source network requires a coupled inductor. The present work deals with comparison of SPWM and SVM based induction motor drive systems.

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Section: Introductionmentioning

confidence: 99%

Induction Motor Control using SVPWM Quasi Z Source Current Fed Inverter

Sathish¹,

Ilango²

2019

International Journal of Innovative Research in Electrical, Ele

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“…The ac line current waveform can be more sinusoidal at the expense of switching losses. Until now several PWM strategies have been utilized in a single-phase ac/dc converter such as bipolar PWM (BPWM), unipolar PWM (UPWM) [12]- [14], HPWM [15]- [18], and Hysteresis switching [3], [19]- [24]. UPWM results in a smaller ripple in the dc side current and significantly lower ac side harmonic content [14] compared to the BPWM.…”

Section: Introductionmentioning

confidence: 99%

“…The UPWM effectively doubles the switching frequency in the ac voltage waveform harmonic spectrum allowing the switching harmonics to be easily removed by the passive filter. The HPWM [16]- [18] utilizes two of the four switches modulated at high frequency and utilizes the other two switches commutated at the (low) output frequency to reduce the switching frequency and achieve better quality output. However, the switching loss in the HPWM is still the same as that of the UPWM [16].…”

Section: Introductionmentioning

confidence: 99%

A Novel Reduced Switching Loss Bidirectional AC/DC Converter PWM Strategy With Feedforward Control for Grid-Tied Microgrid Systems

Liao

2014

IEEE Trans. Power Electron.

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This paper presents a novel simplified pulse width modulation (PWM) strategy for the bidirectional ac/dc singlephase converter in a microgrid system. Then, the operation mechanism of the novel simplified PWM is clearly explained. The number of switchings of the proposed simplified PWM strategy is onefourth that of the conventional unipolar PWM and bipolar PWM. Based on the novel simplified PWM strategy, a feasible feedforward control scheme is developed to achieve better rectifier mode and inverter mode performance compared with the conventional dualloop control scheme. The proposed simplified PWM strategy with the proposed feedforward control scheme has lower total harmonic distortion than the bipolar PWM and higher efficiency than both unipolar and bipolar PWMs. Furthermore, the proposed simplified PWM operated in the inverter mode also has larger available fundamental output voltage V AB than both the unipolar and bipolar PWMs. A prototype system is constructed and the control scheme is implemented using FPGA Spartan-3E XC3S250E. Both simulation and experimental results verify the validity of the proposed PWM strategy and control scheme.Index Terms-Bidirectional ac/dc converter, simplified pulse width modulation (PWM) strategy, total harmonic distortion (THD). 0885-8993

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“…Recent work has focused on control strategies [5]- [9], PWM schemes [10]- [13], topologies [14]- [17], and efficiency [18], [19] for high-power current-source converters and drives, where significant improvements have been achieved, such as harmonic distortion minimization, high input power factor, minimized dc-link current, and reduced switching frequencies. However, it seems that zero-speed operation of the high-power PWM CSI-fed induction motor drive (IMD) has seldom been reported.…”

Section: Introductionmentioning

confidence: 99%

Zero-Speed Operation of High-Power PWM Current-Source-Inverter-Fed Induction Motor Drive

Liu

Pande

et al. 2012

IEEE Trans. Power Electron.

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Most research work in current-source inverter (CSI) fed motor drives has focused on general control strategies, pulsewidth modulation schemes, topologies, and efficiency evaluation. This paper, however, is dedicated to investigating zerospeed operation characteristics of CSI-fed induction motor drives (IMDs). Zero-speed operation can greatly increase the competitive value of the drive and expand its range of applications to include cranes, hoists, and draglines. The motor drive is controlled with rotor flux orientation, where stator currents and motor speed are employed for the rotor flux estimation. Unlike voltage-sourceinverter-based drives, filter capacitors are required at the output of the CSI for current commutation and harmonics filtering. The influence of these capacitors on the system dynamic performance is comprehensively evaluated. Moreover, a classic load torque observer with feedforward control is employed to improve the speed dynamic response. Simulated and experimental results show that the CSI-fed IMD works well at zero speed with promising speed dynamic performance.Index Terms-Current-source inverter (CSI), induction motor drive (IMD), zero speed.

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Use of Hybrid PWM and Passive Resonant Snubber for a Grid-Connected CSI

Cited by 40 publications

References 32 publications

Induction Motor Control using SVPWM Quasi Z Source Current Fed Inverter

Induction Motor Control using SVPWM Quasi Z Source Current Fed Inverter

A Novel Reduced Switching Loss Bidirectional AC/DC Converter PWM Strategy With Feedforward Control for Grid-Tied Microgrid Systems

Zero-Speed Operation of High-Power PWM Current-Source-Inverter-Fed Induction Motor Drive

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