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New Development of Power Electronic Converter Technology and Control Technology in Motor Systems

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A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F3: Power Electronics".

Deadline for manuscript submissions: closed (20 June 2023) | Viewed by 10055

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Special Issue Editors

Prof. Dr. Tingna Shi

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Guest Editor

College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Interests: electrical machines and their control; identification of motor parameters; power electronics converter technology

Prof. Dr. Yan Yan

E-Mail Website
Guest Editor

College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Interests: electrical machines and their control systems; matrix converter; motor system fault diagnosis, and electric drives
Special Issues, Collections and Topics in MDPI journals

Dr. Xinmin Li

E-Mail Website
Guest Editor

School of Electrical Engineering, Tiangong University, Tianjin 300387, China
Interests: electrical machines and their control systems; brushless DC motor; impedance source converter; wind power technology

Special Issue Information

Dear Colleagues,

Power electronic converter technology and control strategies are key to achieving efficient and reliable motor systems, and with the emergence of new semiconductor devices and new power electronic converter topologies, permanent magnet motor systems have been widely used in the fields of electric vehicles (EV), aerospace, robotics, etc. In order to improve the operating performance and efficiency of motor systems, new semiconductor devices, modulation methods, and power electronic topologies have attracted extensive attention, the novel control theory, motor structures, and motor design methods having become research hotspots for the improvement of the operation stability and quality of motor systems. To improve the reliability and life of motor systems, position sensorless control, fault diagnosis methods, and fault-tolerant operation strategies are studied widely.

This Special Issue aims to present and disseminate the most recent advances related to the theory, design, and application of power electronic converters and control strategies in motor systems, as well as recent advances in motor design.

This Special Issue on the "New Development of Power Electronic Converter Technology and Control Technology in Motor Systems" will include topics regarding, but not limited to:

Electric vehicles;
Multi-motor systems;
Brushless DC motor drives;
Multilevel converters;
Matrix converter;
Impedance source converter;
Wide-bandgap semiconductors;
Motor design;
Permanent magnet synchronous motor drives;
Multiphase motor drives;
Servo motor;
Converter fault diagnosis;
State observer;
Predictive control;
Fault-tolerant control.

Prof. Dr. Tingna Shi
Dr. Yan Yan
Dr. Xinmin Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

electric vehicle
permanent magnet synchronous motor
brushless DC motor
servo motor
multiphase motor
motor drive
wide-bandgap semiconductor
multi-motor system
motor control
fault diagnosis
motor design
predictive control
sensorless control
power converter

Published Papers (7 papers)

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Research

16 pages, 5673 KiB

Open AccessArticle

Optimized Synchronous Pulse Width Modulation Strategy Based on Discontinuous Carriers

by Xuefeng Jin, Jiahao Liu, Wei Chen and Tingna Shi

Energies 2023, 16(5), 2401; https://doi.org/10.3390/en16052401 - 02 Mar 2023

Viewed by 1581

Abstract

This article proposes a new technique called optimized discontinuous carrier pulse width modulation (ODCPWM), whose main objective is to solve the issue of significant output voltage harmonics of conventional synchronous carrier modulation at low carrier wave ratios. Based on the symmetry principle, the fundamental wave period is divided into regions; the carriers in adjacent regions are flipped, and the carrier width is changed symmetrically in each region to generate an unequal-width optimized discontinuous carrier pulse width modulation. In addition, using the weighted total harmonic distortion (WTHD) of the line voltage as an evaluation index, an optimized multi-mode PWM strategy is proposed to satisfy the system to operate stably in the whole speed range. The experimental results verify the effectiveness of the proposed strategy. The results show that ODCPWM proposed in this article can eliminate harmonics and multiples of three harmonics in line voltage harmonics. The V_WTHD is lower, which improves the quality of the output waveform and makes the system operation more stable and reliable. The proposed multi-mode PWM strategy is smooth and shock-free during switching. Full article

(This article belongs to the Special Issue New Development of Power Electronic Converter Technology and Control Technology in Motor Systems)

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19 pages, 5763 KiB

Open AccessArticle

Design and Analysis of Modulated Magnetic Pole for Dual Three-Phase Surface-Mounted Permanent Magnet Synchronous Motor

by Liyan Guo, Zhongyuan Hao, Jiaqi Xu, Huimin Wang, Xinmin Li and Shuang Wu

Energies 2022, 15(13), 4597; https://doi.org/10.3390/en15134597 - 23 Jun 2022

Cited by 2 | Viewed by 1055

Abstract

In order to improve the air-gap magnetic field waveform and reduce the torque ripple of dual three-phase surface-mounted permanent magnet synchronous motors (PMSMs), a new surface-mounted modulated permanent magnet (PM) structure is proposed in this paper. Compared with the existing pole-cutting structure, the modulated magnetic pole does not need to customize the precise machining mold. However, when the modulation pole structure is installed, only the magnetic block-assisted assembly structure is designed to reduce the manufacturing cost. Based on the principle of specific harmonic elimination technology (SHET), the number, size and position angle of the modulated magnetic poles can be calculated, and the elimination or the injection of specific harmonics of the air-gap magnetic field can be realized, which can optimize the performance of the motor. It can be seen that the modulation pole structure based on SHET is also an effective method to improve the sinusoidal waveform of the air-gap magnetic field of the surface-mounted PM motor. Full article

(This article belongs to the Special Issue New Development of Power Electronic Converter Technology and Control Technology in Motor Systems)

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20 pages, 5701 KiB

Open AccessArticle

Harmonic Analysis and Attenuation Strategy for a Two-Stage Matrix Converter Fed by Dual-Inverter Based on Pulse Barycenter Method

by Qiang Geng, Jiahe Feng, Haojie Sha, Weixi Zhou and Zhanqing Zhou

Energies 2022, 15(12), 4447; https://doi.org/10.3390/en15124447 - 18 Jun 2022

Viewed by 1030

Abstract

Since the DC-link of the dual-inverter two-stage matrix converter (TSMC) has no energy storage element, its grid-side current waveform is closely related to the load-side condition. The conventional modulation strategy of the dual-inverter TSMC is only the stack of the double inverters, without considering the cooperation between both modulation strategies. Thus, the fluctuations in the grid-side currents synthesized by both load-side currents will be obvious. To solve this problem, this paper analyzes the effect of the current pulse position on the grid-side current waveform quality, and relevant relationship between the pulse position and current harmonics is obtained according to Fourier transform. On this basis, the harmonic attenuation strategy for the dual-inverter TSMC is proposed. In the proposed strategy, the grid-side current harmonic is reduced based on the optimal duty-cycle combination, obtained from the harmonic optimization problem. The simulation and experimental results are provided to verify that the theoretical analysis of grid-side current harmonic content is consistent with the actual condition, and the proposed modulation strategy can effectively reduce the grid-side current harmonic. Full article

(This article belongs to the Special Issue New Development of Power Electronic Converter Technology and Control Technology in Motor Systems)

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19 pages, 4851 KiB

Open AccessArticle

Improved Deadbeat Predictive Control Based Current Harmonic Suppression Strategy for IPMSM

by Xin Gu, Yiyang Li, Wei Chen and Xuefeng Jin

Energies 2022, 15(11), 3943; https://doi.org/10.3390/en15113943 - 26 May 2022

Cited by 6 | Viewed by 1508

Abstract

When the interior permanent magnet synchronous motor (IPMSM) is running, there are abundant harmonics in the stator current. In order to achieve the suppression of current harmonics, the current harmonic extraction method and current harmonic controller are studied in this paper. Firstly, a simple and accurate method for extracting current harmonics is proposed by means of multiple synchronous rotating frame transformation (MSRFT). Secondly, an improved deadbeat predictive control (IDPC) based current harmonic controller is designed after analyzing the advantages and disadvantages of traditional current harmonic controllers. Thirdly, IDPC-based current harmonic suppression strategy is proposed by combining the proposed current harmonic extraction method and the proposed current harmonic controller. The proposed strategy can still effectively achieve current harmonic suppression when the motor runs at low speed, medium speed and high speed and the controller parameters are mismatched with the motor parameters. Finally, the feasibility and effectiveness of the proposed strategy are verified by simulation and experiments. Full article

(This article belongs to the Special Issue New Development of Power Electronic Converter Technology and Control Technology in Motor Systems)

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15 pages, 5765 KiB

Open AccessArticle

A Flying Restart Strategy for Position Sensorless PMSM Driven by Quasi-Z-Source Inverter

by Yanfei Cao, Shuxin Xiao and Zhichen Lin

Energies 2022, 15(9), 3469; https://doi.org/10.3390/en15093469 - 09 May 2022

Viewed by 1754

Abstract

The accurate estimation of rotor position and speed before flying restart is of great significance to improve the operation reliability of permanent magnet synchronous motor systems. The traditional multizero vector short-circuit method can improve the estimation accuracy of speed and rotor position, but the increased number of short-circuits reduces the electromagnetic torque response speed after the power supply recovers. In order to accurately estimate the initial speed and rotor position before the flying restart and effectively improve the electromagnetic torque response speed, a shoot-through zero vector short-circuit method based on quasi-Z-source inverter (qZSI) is proposed. This method breaks the limitation of regulating DC link voltage under the normal operation of the motor in the conventional methods, and puts forward a new idea of advancing the regulation of the DC link voltage to the stage of abnormal operation before the motor restarts. By designing the insertion mode of the mixed vectors and analyzing the action time of each vector before the flying restart, the accurate estimation of position and speed is realized and, meanwhile, the boost of the qZSI’s DC link voltage is achieved, thus giving the sensorless flying restart method a faster torque response speed for the PMSM system driven by qZSIs. Full article

(This article belongs to the Special Issue New Development of Power Electronic Converter Technology and Control Technology in Motor Systems)

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13 pages, 3014 KiB

Open AccessArticle

Optimization Design of Unequal Amplitude Modulated Poles for the Bearingless PMSM

by Huimin Wang, Yuting Lu, Shuang Wu and Liyan Guo

Energies 2022, 15(9), 3097; https://doi.org/10.3390/en15093097 - 24 Apr 2022

Cited by 3 | Viewed by 1206

Abstract

The structural parameters of an equal amplitude modulated magnetic pole is limited by the length of the air-gap. When the modulation ratio or carrier ratio is small, the spacing of permanent magnets is too large, which will lead to a worse cogging effect, and then the torque optimization effect is not satisfying. In order to improve the operation stability of a bearingless permanent magnet synchronous motor (bearingless PMSM), an unequal amplitude modulated magnetic pole structure is proposed according to the principle of magnetic pole modulation. The Taguchi method is used to optimize the structural parameters of the unequal amplitude modulated magnetic pole with the goal of reducing the torque and suspension force fluctuation. Three kinds of magnetic pole structures, named the whole magnetic pole, the equal amplitude modulated magnetic pole and the unequal amplitude modulated magnetic pole are compared and verified. The results show that the proposed structure of the unequal amplitude modulated magnetic pole can effectively further decrease the torque and suspension force fluctuations under the premise of the output capacity of the motor being unchanged, which improves the performance of the bearingless PMSM. Full article

(This article belongs to the Special Issue New Development of Power Electronic Converter Technology and Control Technology in Motor Systems)

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21 pages, 99330 KiB

Open AccessArticle

Low-Carrier-Ratio Modulation Strategy Based on Improved Flux Ripple Model

by Zhiqiang Wang, Yan Niu, Xiayu Yan and Xin Gu

Energies 2022, 15(6), 2173; https://doi.org/10.3390/en15062173 - 16 Mar 2022

Viewed by 1322

Abstract

Since the quality of the direct and quadrature axis current (dq-axis) is an important performance indicator of a motor, the technique of flux ripple analysis is necessary to determine the appropriate working conditions for various voltage sequences and reduce current fluctuations. However, the traditional flux ripple model cannot analyze dq-axis flux ripples (except under no-load conditions). Therefore, it is unable to calculate the modulation ratio and voltage angle (angle between the reference vector and the q-axis) ranges to satisfy the given q-axis (or d-axis) current fluctuation requirement based on this model. To solve this problem, in this paper, we derived an improved flux ripple model by applying coordinate transformation to the traditional flux ripple model, which can be used to calculate the RMS (root mean square) value of the q-axis and the total flux ripple distribution within sector I under different modulation ratios and voltage angle ranges. The modulation ratio and voltage angle range of low-carrier-ratio modulation strategy (0121 sequence) with a smaller RMS value of flux ripple compared to the traditional modulation strategy (0127 sequence) was determined based on the calculated results of the RMS values of the flux ripple. It was concluded that the 0121 sequence is suitable for high-modulation-ratio conditions as a result of analysis by applying the proposed method to determine the proper working conditions for the low-carrier-ratio modulation strategy, and there was an improvement effect of reducing the current ripple and THD by adopting a low-carrier-ratio modulation strategy instead of the traditional modulation strategy in high-modulation-ratio conditions. The validity of the proposed improved flux ripple analysis method and low-carrier-ratio modulation strategy has been verified by simulation and experiment. Full article

(This article belongs to the Special Issue New Development of Power Electronic Converter Technology and Control Technology in Motor Systems)

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