Generalized pulse-width-modulation to reduce common-mode voltage in matrix converters

This article presents three variants of the Pulse Width Modulation (PWM) for the Double Square Multiphase type Conventional Matrix Converters (DSM-CMC) supplying loads with the open-end winding. The first variant of PWM offers the ability to obtain zero value of the common-mode voltage at the load’s terminals and applies only six switches within the modulation period. The second proposal archives for less Total Harmonic Distortion (THD) of the generated load voltage. The third variant of modulation concerns maximizing the voltage transfer ratio, minimizing the number of switching, and the common-mode voltage cancellation. The discussed modulations are based on the concept of sinusoidal voltage quadrature signals, which can be an effective alternative to the classic space-vector approach. In the proposed approach, the geometrical arrangement of basic vectors needed to synthesize output voltages is built from the less number of vectors, which is equal to the number of the matrix converter’s terminals. The PWM duty cycle computation is performed using only a second-order determinant of the voltages coordinate matrix without using trigonometric functions. A new approach to the PWM duty cycles computing and the load voltage synthesis by 5 × 5 and 12 × 12 topologies has been verified using the PSIM simulation software.

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Space vector modulation with reduced common mode voltage for six-phase drives

COMPEL The International Journal for Computation and Mathematics in Electrical and Electronic Engineering ◽

10.1108/compel-09-2019-0347 ◽

2020 ◽

Vol 39 (2) ◽

pp. 395-411

Author(s):

Mohammad Jafar Zandzadeh ◽

Mohsen Saniei ◽

Reza Kianinezhad

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Torque Ripple ◽

Drive System ◽

Limiting Factors ◽

Space Vector ◽

Common Mode ◽

Content Type ◽

Common Mode Voltage ◽

Space Vectors

Purpose This paper aims to present a modified space vector pulse width modulation (SVPWM) technique for six-phase induction motor drive based on common-mode voltage (CMV) and current losses which are two important issues affecting drive system behavior and quality. Design/methodology/approach It is shown that the presence of z-component currents and the presence of CMV in six-phase drive system are two major limiting factors in space vector selection. The behavior of several space vector selections in a two-level inverter considering minimum CMV and z-components is investigated. Then, the space vectors in a three-level inverter is analyzed and tried to explore an SVM technique with better behavior. Findings The analyses show that all the problems cannot be solved in a six-phase drive system with two-level inverter despite having 64 space vectors; this study tried to overcome the limitations by exploring space vectors in a three-level inverter. Originality/value The proposed pulse width modulation (PWM) strategy leads to minimum current distortion and undesired current components with zero CMV and modest torque ripple.

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A Five-Level Converter in a Three-Level Mode for Common-Mode Leakage Current Suppression in PV-Generation Systems

10.20944/preprints202107.0304.v1 ◽

2021 ◽

Author(s):

Aleksey Vyacheslavovich Udovichenko ◽

Sergey Viktorovich Brovanov ◽

Evgeny Valerievich Grishanov ◽

Svetlana Mikhailovna Stennikova

Keyword(s):

Leakage Current ◽

Pulse Width ◽

Pulse Width Modulation ◽

Renewable Energy Sources ◽

Multilevel Converter ◽

Generation System ◽

Common Mode ◽

Common Mode Voltage ◽

Conducting Research ◽

Pv Generation

Power generation systems based on renewable energy sources are finding ever-widening applications and many researchers work on this problem. Many papers address the problem of transformerless structures, but few of them are aimed at conducting research on structures with multilevel converter topologies. In this paper a grid-tied transformerless PV-generation system based on a multilevel converter is discussed. There are common-mode leakage currents which act as a parasitic factor. It is also known that common-mode voltage is the main cause of the common-mode leakage current in grid-tied PV-generation systems. This paper considers the space vector pulse-width modulation (PWM) technique which is used to suppress or reduce common-mode leakage current. The proposed engineering solutions for a generation system based on the multilevel converter controlled with a pulse-width modulation technique are verified by experiment.

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Common Mode Voltage Elimination for Quasi-Switch Boost T-Type Inverter Based on SVM Technique

Electronics ◽

10.3390/electronics9010076 ◽

2020 ◽

Vol 9 (1) ◽

pp. 76 ◽

Cited By ~ 4

Author(s):

Duc-Tri Do ◽

Minh-Khai Nguyen ◽

Van-Thuyen Ngo ◽

Thanh-Hai Quach ◽

Vinh-Thanh Tran

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Space Vector Modulation ◽

Common Mode ◽

Switching Sequence ◽

Modulation Technique ◽

Common Mode Voltage ◽

Vector Modulation ◽

Zero Vector ◽

Current Ripple

In this paper, the effect of common-mode voltage generated in the three-level quasi-switched boost T-type inverter is minimized by applying the proposed space-vector modulation technique, which uses only medium vectors and zero vector to synthesize the reference vector. The switching sequence is selected smoothly for inserting the shoot-through state for the inverter branch. The shoot-through vector is added within the zero vector in order to not affect the active vectors as well as the output voltage. In addition, the shoot-through control signal of active switches of the impedance network is generated to ensure that its phase is shifted 90 degrees compared to shoot through the signal of the inverter leg, which provides an improvement in reducing the inductor current ripple and enhancing the voltage gain. The effectiveness of the proposed method is verified through simulation and experimental results. In addition, the superiority of the proposed scheme is demonstrated by comparing it to the conventional pulse-width modulation technique.

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Improvement and reduction of common mode voltage in active zero space vector pulse width modulation in three-phase inverter

2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific) ◽

10.1109/itec-ap.2017.8080791 ◽

2017 ◽

Author(s):

YongKeun Lee ◽

JangHyeon Lee ◽

JangWook Lee

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Space Vector ◽

Common Mode ◽

Phase Inverter ◽

Common Mode Voltage ◽

Three Phase ◽

Three Phase Inverter

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Common-Mode Reduction SVPWM for Three-Phase Motor Fed by Two-Level Voltage Source Inverter

Energies ◽

10.3390/en13153884 ◽

2020 ◽

Vol 13 (15) ◽

pp. 3884

Author(s):

Jian Zheng ◽

Mingcheng Lyu ◽

Shengqing Li ◽

Qiwu Luo ◽

Keyuan Huang

Keyword(s):

High Frequency ◽

Pulse Width ◽

Pulse Width Modulation ◽

Voltage Source ◽

Switching Frequency ◽

Voltage Source Inverter ◽

Large Magnitude ◽

Common Mode ◽

Common Mode Voltage ◽

Three Phase

Aiming at the problem of large magnitude and high frequency of common-mode voltage (CMV) when space vector pulse width modulation (SVPWM) is used in a three-phase motor fed by a two-level voltage source inverter, a common-mode reduction SVPWM (CMRSVPWM) is studied. In this method, six new sectors are obtained by rotating six sectors of conventional SVPWM by 30°. In odd-numbered sectors, only three non-zero vectors with odd subscripts are used for synthesis, while in even-numbered sectors, only three non-zero vectors with even subscripts are used for synthesis. The actuation durations of three non-zero vectors in each switching period in each sector are given. Simulation and experimental results show that, compared with the conventional SVPWM, the CMV magnitude of CMRSVPWM is reduced by 66.67% and the CMV frequency of CMRSVPWM is reduced from the original switching frequency to the triple fundamental frequency. At the same time, the current, torque and speed of the motor are still good.

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