Improved Synchronized Space Vector PWM Strategy for Three-Level Inverter at Low Modulation Index

Aimed at reducing the switching loss and common-mode voltage amplitude of high-power medium-voltage three-level inverter under low modulation index conditions, an improved synchronous space vector PWM strategy is proposed in this paper. The switching times in each fundamental period are reduced by the re-division of small regions and the full use of the redundant switching state. The sum of switching algebra is introduced as an evaluation index and the switching state with the minimum value of the sum of switching algebra are adopted. Then, the common mode voltage amplitude is reduced. The theoretical analysis and experimental results show that the improved modulation strategy proposed in this paper can effectively reduce the switching loss and common-mode voltage amplitude of the inverter under the condition of the low modulation index. Moreover, the neutral-point voltage ripple is also reduced simultaneously.

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Modulation Technique for Modified Active Quasi-Z-Source Inverter with Common-Mode Voltage Reduction

Electronics ◽

10.3390/electronics10232968 ◽

2021 ◽

Vol 10 (23) ◽

pp. 2968

Author(s):

Minh-Khai Nguyen ◽

Youn-Ok Choi

Keyword(s):

Pulse Width Modulation ◽

High Amplitude ◽

Modulation Index ◽

Switching Loss ◽

Space Vector ◽

Common Mode ◽

Common Mode Voltage ◽

High Modulation ◽

New Space ◽

Vector Modulation

In Z-source topologies, a high-amplitude common-mode voltage can occur when shoot-through states are inserted. In this study, a new space vector pulse-width modulation for an active quasi-Z-source topology is proposed to operate at a high modulation index and reduce the common-mode voltage to one-third of the DC-link voltage. Moreover, the quality of the output voltage is improved by operation with a high modulation index and decreasing the switching loss of the H-bridge switches. The detailed operating principles of the active quasi-Z-source topology using the proposed space vector modulation (SVM) method are presented. A simulation model was built, and an experimental prototype was verified to correct the theoretical analysis.

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Space-Vector PWM With Reduced Common-Mode Voltage for Five-Phase Induction Motor Drives

IEEE Transactions on Industrial Electronics ◽

10.1109/tie.2012.2217719 ◽

2013 ◽

Vol 60 (10) ◽

pp. 4159-4168 ◽

Cited By ~ 67

Author(s):

Mario J. Duran ◽

Joel Prieto ◽

Federico Barrero ◽

Jose A. Riveros ◽

Hugo Guzman

Keyword(s):

Induction Motor ◽

Motor Drives ◽

Space Vector Pwm ◽

Induction Motor Drives ◽

Space Vector ◽

Common Mode ◽

Common Mode Voltage

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A Study on Common Mode Voltage Reduction Strategies According to Modulation Methods in Modular Multilevel Converter

Energies ◽

10.3390/en14061607 ◽

2021 ◽

Vol 14 (6) ◽

pp. 1607

Author(s):

Chang-Hwan Park ◽

In-Kyo Seo ◽

Belete Belayneh Negesse ◽

Jong-su Yoon ◽

Jang-Mok Kim

Keyword(s):

Electromagnetic Interference ◽

Experimental Result ◽

Modular Multilevel Converter ◽

Multilevel Converter ◽

Frequent Change ◽

Common Mode ◽

Medium Voltage ◽

Low Level ◽

Common Mode Voltage ◽

Switching State

Low level modular multilevel converter (MMC) is a promising candidate for medium voltage applications such as MVDC (medium voltage DC current) transmission and megawatt machine drives. Unlike high-level MMC using nearest level modulation (NLM), the low-level MMC using the pulse width modulation (PWM) or NLM + PWM is affected by a common mode voltage (CMV) due to a frequent change of a switching state. This CMV causes electromagnetic interference (EMI) noise, common mode current (CMC) and bearing current leading to a reduction in the efficiency and durability of the motor drive system. Therefore, this paper provides a mathematical analysis on how the switching state affects the CMV and proposes three software based CMV reduction algorithms for the low level MMC system. To reflect the characteristic of MMC modulation strategy for upper and lower reference voltage independently, two separate space vectors are used. Based on the analysis, three different CMV reduction algorithms (complete CMV reduction (CCR), DPWM CMV reduction (DCR) and partial CMV reduction (PCR)) are proposed using NLC + PWM modulation strategy. The performance of the proposed CMV reduction algorithms was verified by both simulation and experimental result.

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Space-Vector PWM With Common-Mode Voltage Elimination for Multiphase Drives

IEEE Transactions on Power Electronics ◽

10.1109/tpel.2016.2521330 ◽

2016 ◽

Vol 31 (12) ◽

pp. 8151-8161 ◽

Cited By ~ 26

Author(s):

Oscar Lopez ◽

Jacobo Alvarez ◽

Jano Malvar ◽

Alejandro G. Yepes ◽

Ana Vidal ◽

...

Keyword(s):

Space Vector Pwm ◽

Space Vector ◽

Common Mode ◽

Common Mode Voltage

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Space-vector modulation for three-phase indirect matrix converters to reduce common-mode voltage

Science & Technology Development Journal - Engineering and Technology ◽

10.32508/stdjet.v4i2.797 ◽

2021 ◽

Vol 4 (2) ◽

pp. first

Author(s):

Hoan Quoc Tran ◽

Tien Manh Vu ◽

Tuyen Dinh Nguyen

Keyword(s):

Matrix Converter ◽

Space Vector Modulation ◽

Space Vector ◽

Common Mode ◽

Common Mode Voltage ◽

Output Performance ◽

Three Phase ◽

The Common ◽

Vector Modulation ◽

Zero Voltage

This paper presents a space vector modulation strategy for a three-phase indirect matrix converter to reduce the common-mode voltage and maintain the output performance. To reduce the peak value of the common-mode voltage to 57.7% of the input phase voltage, three active voltage vectors are used to generate the desired output voltage with arbitrary amplitude and frequency, instead of using both active and zero voltage vectors as in the traditional space vector modulation strategy. Although the common-mode voltage is reduced, the output waveform quality of the three-phase indirect matrix converter deteriorates due to the absence of the zero voltage vectors. To overcome this problem, the proposed space vector modulation strategy is redesigned to control the rectifier stage of the indirect matrix converter by utilizing three active current vectors instead of two as usual. Consequently, the constant average dc-link voltage is achieved, which can improve the output performance in terms of the output voltage and current harmonic distortion. The simulation is implemented by PSIM software and experimental results are provided to verify the effectiveness of the proposed space vector modulation strategy.

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Minimization of Common-Mode Voltage of Three-Phase Five-Level NPC Inverter Using 3D Space Vector Modulation

Journal of Circuits System and Computers ◽

10.1142/s0218126620502291 ◽

2020 ◽

Vol 29 (14) ◽

pp. 2050229 ◽

Cited By ~ 1

Author(s):

Palanisamy Ramasamy ◽

Vijayakumar Krishnasamy

Keyword(s):

Dimensional Space ◽

Three Dimensional ◽

Harmonic Distortion ◽

Space Vector Modulation ◽

Space Vector ◽

Common Mode ◽

Common Mode Voltage ◽

3D Space ◽

Vector Modulation ◽

Switching State

In this paper, a three-dimensional Space Vector Modulation (3D SVM) is implemented for minimization of Common-Mode Voltage (CMV) of five-level Neutral Point Clamped (NPC) inverter. The 3D SVM control includes all merits of 2D SVM and provides better control compared to other PWM strategies. The switching state vectors are selected based on the nearest vector Switching State Vector (NSV); it selects the switching vectors which are having the minimum CMV level. It leads to minimization of the bearing voltage and protection of the drive from the damage; also this system reduces the total harmonic distortion. The switching time is calculated by reference vector identification with large and small subcubes tracking and prisms tracking in 3D cubic region. The CMV level with 3D SVM scheme is compared with other PWM methods. The simulation and hardware results are verified using Matlab Simulink and FPGA processor.

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