Comparison of Two Overmodulation Strategies in an Indirect Matrix Converter

Chiang, Goh Teck; Itoh, Jun‐ichi

doi:10.1109/tie.2012.2185021

Cited by 61 publications

(27 citation statements)

References 25 publications

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“…It is exactly that this limitation leads to lack of load driving ability when the driving system combined with USMC is overloading in the range of approximate rated speed. Nowadays, the method of improving voltage transfer ratio (VTR) can be divided into two categories: topology [6][7][8][9] and modulation [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Research on Linear Output Voltage Transfer Ratio for Ultrasparse Matrix Converter

Xia

Yan

et al. 2016

IEEE Trans. Power Electron.

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Many existing researches of ultra Sparse matrix converter (USMC) show that the maximum linear output voltage transfer ratio (MLO-VTR)is less than 0.866, however, this paper proves that, based on space vector modulation(SVM), MLO-VTR for USMC can break the ultimate value. Firstly, based on the condition that input power factor is 1, the maximum output voltage within one carrier period and the maximum linear output voltage are derived. Further the mathematical equations among MLO-VTR, the output/input frequency ratios and the output voltage initial phase is also derived. After that, by solving the operating limits of the mathematical relationship of the MLO-VTR, we can obtain the maximum value of MLO-VTR under different output/input frequency ratios, which can be more than 0.866. Finally, all of theoretical derivations are verified by experiments.

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Section: Introductionmentioning

confidence: 99%

“…The modulation strategy operating with non-unity input power factor has been proposed [10], which allows increased maximum output voltage. References [11] and [12] discussed two overmodulation strategies based on square wave and trapezoidal wave. The modulation with injecting 3rd harmonic [13] can improve the VTR to 1.…”

Section: Introductionmentioning

confidence: 99%

Research on Linear Output Voltage Transfer Ratio for Ultrasparse Matrix Converter

Xia

Yan

et al. 2016

IEEE Trans. Power Electron.

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“…A developing branch of MCs is the two-stage MC (TSMC) [12]. It not only inherits high efficiency, high power density, high reliability, and long usage lifetime from the conventional MC, but also has advantages in convenient commutation, simple clamp circuits, and the feasibility of zero current switching in rectifier stage, [13], [14]. For this reason, in [11], conclusions have been made via theoretical derivation and experiments that the TSMC's power density is higher than the MC's, and that the TSMC's efficiency at part load is greater than the MC's when output frequency is above 10 Hz.…”

Section: Introductionmentioning

confidence: 99%

Distortion Analysis and Duty Ratio Correction Algorithm for Asymmetric Modulation of Two-Stage Matrix Converter

Qin

Zhang

Wei

et al. 2015

IEEE Trans. Ind. Electron.

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When applying the two-stage matrix converter (TSMC) to the aero variable-speed constant-frequency generation system, the high input frequency varying between 360 and 800 Hz becomes a great challenge to its control. One of the most commonly used modulation methods for TSMC is the dual space vector modulation (DSVM). Simulation and experiments show that despite its advantages such as simplicity and low switching loss, the asymmetric DSVM causes distortion both in the output voltages and input currents of the TSMC. In this paper, the conception of "pulse orthocenter" (PO) is introduced via a BUCK model, and the influence of PO's fluctuation upon the actual output is revealed. Based on the PO theory, the spectra of TSMC's output voltages and input currents are then analyzed, indicating that asymmetric modulation causes 3nω in ± (3m ± 1)ω o harmonics in the output voltages and (3n ± 1)ω in harmonics in the input currents. In order to suppress these harmonics, a duty ratio correction (DRC) algorithm is proposed to improve the waveform quality without increasing switching loss. The DRC formula is provided and the available range of related parameters discussed. The correctness of distortion analysis is testified via simulation, and the validity and feasibility of the DRC algorithm is verified via experiments.Index Terms-Distortion analysis, duty ratio correction (DRC), two-stage matrix converter (TSMC), variable-speed constant frequency (VSCF).

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“…But these PWM strategies have no zero vectors. In [23][24][25][26], carrier-PWM realization and overmodulation method for IMC are discussed. In the applications of indirect matrix converter, [27] proposes IMC to control doubly fed induction generation for wind power system.…”

Section: Introductionmentioning

confidence: 99%

Realization of SVM Algorithm for Indirect Matrix Converter and Its Application in Power Factor Control

2015

Advances in Power Electronics

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Compared with AC-DC-AC converter, matrix converter (MC) has several advantages for its bidirectional power flow, controllable power factor, and the absence of large energy storage in dc-link. The topology of MC includes direct matrix converter (DMC) and indirect matrix converter (IMC). IMC has received great attention worldwide because of its easy implementation and safe commutation. Space vector PWM (SVM) algorithm for indirect matrix converter is realized on DSP and CPLD platform in this paper. The control of the rectifier and inverter in IMC can be decoupled because of the intermediate dc-link. The space vector modulation scheme for IMC is discussed and the PWM sequences for the rectifier and inverter are generated. And a two-step commutation of zero current switching (ZCS) in the rectifier is achieved. Input power factor of IMC can be changed by adjusting the angle of the reference current vector. Experimental tests have been conducted on a RB-IGBT based indirect matrix converter prototype. The results verify the performance of the SVM algorithm and the ability of power factor correction.

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Comparison of Two Overmodulation Strategies in an Indirect Matrix Converter

Cited by 61 publications

References 25 publications

Research on Linear Output Voltage Transfer Ratio for Ultrasparse Matrix Converter

Research on Linear Output Voltage Transfer Ratio for Ultrasparse Matrix Converter

Distortion Analysis and Duty Ratio Correction Algorithm for Asymmetric Modulation of Two-Stage Matrix Converter

Realization of SVM Algorithm for Indirect Matrix Converter and Its Application in Power Factor Control

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