This page has only limited features, please log in for full access.
Switched reluctance machines (SRMs) have received increasing attention for their many potential uses, such as for wind power and electric vehicle (EV) drive systems. The Quasi-Z-source Integrated Multiport Converter (QZIMPC) was recently introduced to improve the reliability of the SRM driver through small capacitance values. It is not possible, however, to simultaneously energize and deenergize two SRM phases in QZIMPC. This phenomenon can significantly increase the commutation period which, in turn, degrades the performance of SRM; in addition, this causes high-voltage ripples on the converter’s capacitors. Two switching algorithms are introduced and applied in this paper, and their performance with SRM is investigated in terms of torque ripple and peak phase current. The algorithms are based on prioritizing the control command in the on-going and off-going phases to fulfill the required load torque, as well as to accelerate the commutation process where possible. This is achieved without the interference of high-level controllers, which include speed controllers and/or torque ripple minimization. Through the simulation results, a comparison between the two switching algorithms is presented to determine their potential to improve the SRM drive system’s performance.
Mahmoud A. Gaafar; Arwa Abdelmaksoud; Mohamed Orabi; Hao Chen; Mostafa Dardeer. Performance Investigation of Switched Reluctance Motor Driven by Quasi-Z-Source Integrated Multiport Converter with Different Switching Algorithms. Sustainability 2021, 13, 9517 .
AMA StyleMahmoud A. Gaafar, Arwa Abdelmaksoud, Mohamed Orabi, Hao Chen, Mostafa Dardeer. Performance Investigation of Switched Reluctance Motor Driven by Quasi-Z-Source Integrated Multiport Converter with Different Switching Algorithms. Sustainability. 2021; 13 (17):9517.
Chicago/Turabian StyleMahmoud A. Gaafar; Arwa Abdelmaksoud; Mohamed Orabi; Hao Chen; Mostafa Dardeer. 2021. "Performance Investigation of Switched Reluctance Motor Driven by Quasi-Z-Source Integrated Multiport Converter with Different Switching Algorithms." Sustainability 13, no. 17: 9517.
The eddy-current loss of switched reluctance motor (SRM) is studied and analyzed in this paper. As a significant part of core loss, eddy-current loss has a great influence on motor perfor-mance. First, the average magnetic flux waveforms in every dis-tributed region were derived from the magnetic equivalent circuit (MEC) model. Based on this, each harmonic of magnetic density was obtained by adopting the fast Fourier transform (FFT) method for further calculation. Then, each harmonic eddy-current loss is computed by sinusoidal magnetic density and the total eddy-current loss in different region of motor is derived by superposing of them. Therefore, the calculated results at different speed and various conduction angles of each region are analyzed. Finally, the 3D finite element (FE) model is established in soft-ware FLUX and the experimental platform of SRM prototype is built.
Hao Chen; Fengyuan Yu; Wenju Yan; Mohamed Orabi. Calculation and Analysis of Eddy-Current Loss in Switched Reluctance Motor. IEEE Transactions on Applied Superconductivity 2021, PP, 1 -1.
AMA StyleHao Chen, Fengyuan Yu, Wenju Yan, Mohamed Orabi. Calculation and Analysis of Eddy-Current Loss in Switched Reluctance Motor. IEEE Transactions on Applied Superconductivity. 2021; PP (99):1-1.
Chicago/Turabian StyleHao Chen; Fengyuan Yu; Wenju Yan; Mohamed Orabi. 2021. "Calculation and Analysis of Eddy-Current Loss in Switched Reluctance Motor." IEEE Transactions on Applied Superconductivity PP, no. 99: 1-1.
This paper presented an improved switching transient model of silicon carbide (SiC)-based asymmetric H-bridge (AHB) power converter for a switched reluctance generator (SRG), which takes the nonlinear phase inductance of the SRG into consideration. First, a systematic mathematic derivation is carried out and the switching transient model is established. Second, the impact of the nonlinear phase inductance of the SRG on switching transients is verified by PSpice & Simulink co-simulations. Third, a power loss model is established by the transient model through PSpice & Simulink co-simulations. The model is conducted to indicate the power loss characteristics of the SiC-based AHB power converter. Simulation results indicate that the nonlinear phase inductance of the SRG is able to accelerate the switching speed of SiC-MOSFETs, and that the SiC converter is advantageous in terms of power loss. Experimental results illustrate that the established power loss model experiences high accuracy. In addition, SiC devices are able to strengthen the power density and efficiency of a converter while reducing its heat dissipation requirements.
Sihang Cui; Hao Chen; Liang Liu; Fan Yang; Shuai Xu. Improved switching transient model suitable for power loss evaluation of SiC-based asymmetric H-bridge power converters in SRGs. Journal of Power Electronics 2021, 21, 1084 -1094.
AMA StyleSihang Cui, Hao Chen, Liang Liu, Fan Yang, Shuai Xu. Improved switching transient model suitable for power loss evaluation of SiC-based asymmetric H-bridge power converters in SRGs. Journal of Power Electronics. 2021; 21 (7):1084-1094.
Chicago/Turabian StyleSihang Cui; Hao Chen; Liang Liu; Fan Yang; Shuai Xu. 2021. "Improved switching transient model suitable for power loss evaluation of SiC-based asymmetric H-bridge power converters in SRGs." Journal of Power Electronics 21, no. 7: 1084-1094.
Hao Chen; Rui Nie; Jingfu Liu; Wenmin Zhao; Zhongzheng Yuan; Jiacheng Tian. Corrections to “A Novel Tubular Switched Reluctance Linear Machine Shielding From Longitudinal End Magnetic Effect”. IEEE Transactions on Applied Superconductivity 2021, 31, 1 -1.
AMA StyleHao Chen, Rui Nie, Jingfu Liu, Wenmin Zhao, Zhongzheng Yuan, Jiacheng Tian. Corrections to “A Novel Tubular Switched Reluctance Linear Machine Shielding From Longitudinal End Magnetic Effect”. IEEE Transactions on Applied Superconductivity. 2021; 31 (2):1-1.
Chicago/Turabian StyleHao Chen; Rui Nie; Jingfu Liu; Wenmin Zhao; Zhongzheng Yuan; Jiacheng Tian. 2021. "Corrections to “A Novel Tubular Switched Reluctance Linear Machine Shielding From Longitudinal End Magnetic Effect”." IEEE Transactions on Applied Superconductivity 31, no. 2: 1-1.
Corrections were made to finanical support information for the above named paper.
Hao Chen; Shuyan Zhao; Haiying Wang; Rui Nie. Corrections to “A Novel Single-Phase Tubular Permanent Magnet Linear Generator”. IEEE Transactions on Applied Superconductivity 2020, 31, 1 -1.
AMA StyleHao Chen, Shuyan Zhao, Haiying Wang, Rui Nie. Corrections to “A Novel Single-Phase Tubular Permanent Magnet Linear Generator”. IEEE Transactions on Applied Superconductivity. 2020; 31 (2):1-1.
Chicago/Turabian StyleHao Chen; Shuyan Zhao; Haiying Wang; Rui Nie. 2020. "Corrections to “A Novel Single-Phase Tubular Permanent Magnet Linear Generator”." IEEE Transactions on Applied Superconductivity 31, no. 2: 1-1.
Presents corrections to financial data posted for this article.
Hao Chen; Xuekun Liu; Wenju Yan. Corrections to “Three-Dimensional Magnetic Equivalent Circuit Research of Double-Sided Switched Reluctance Linear Machine”. IEEE Transactions on Applied Superconductivity 2020, 31, 1 -1.
AMA StyleHao Chen, Xuekun Liu, Wenju Yan. Corrections to “Three-Dimensional Magnetic Equivalent Circuit Research of Double-Sided Switched Reluctance Linear Machine”. IEEE Transactions on Applied Superconductivity. 2020; 31 (2):1-1.
Chicago/Turabian StyleHao Chen; Xuekun Liu; Wenju Yan. 2020. "Corrections to “Three-Dimensional Magnetic Equivalent Circuit Research of Double-Sided Switched Reluctance Linear Machine”." IEEE Transactions on Applied Superconductivity 31, no. 2: 1-1.
More Electric Aircraft (MEA) is expected to optimize aircraft performance and switched reluctance starter/generator (SR S/G) system is recommended as a key technique for MEA implementation. In order to improve safety and reduce aircraft maintenance time, it is necessary to quickly identify and locate electrical faults in the electrical system. This paper proposes a fault diagnosis method for power converter of SR S/G for more electric aircraft. Through the distortion analysis of cross-leg current, the proposed methods are capable of detecting both open-circuit (OC) and short-circuit (SC) of power transistors in asymmetric half-bridge converter (AHBC). Each phase current can be calculated by taking the absolute value of cross leg current. Different faults are preliminarily detected through the sudden change of current. After monitoring the fault occurrence, different switching states and digital cross leg current will be recorded, which determine the fault type and the fault power transistor. The proposed method does not require additional hardware and complex calculations so that the methods have good robustness and reliability. In addition, the proposed methods are suitable for SR S/G operating at various control modes. A three-phase 12/8 structure SR S/G is adopted in the paper and the method is applicable for the SR S/G. Moreover, experiments carried out in different working modes validate the feasibility and effectiveness of the proposed fault diagnosis method.
Hao Chen; Haobiao Chen; Guoqiang Han; Guorui Guan. Power Transistors’ Fault Diagnosis Method of SR S/G for More Electric Aircraft With Cross-Leg Current Analysis. IEEE Transactions on Transportation Electrification 2020, 6, 1528 -1536.
AMA StyleHao Chen, Haobiao Chen, Guoqiang Han, Guorui Guan. Power Transistors’ Fault Diagnosis Method of SR S/G for More Electric Aircraft With Cross-Leg Current Analysis. IEEE Transactions on Transportation Electrification. 2020; 6 (4):1528-1536.
Chicago/Turabian StyleHao Chen; Haobiao Chen; Guoqiang Han; Guorui Guan. 2020. "Power Transistors’ Fault Diagnosis Method of SR S/G for More Electric Aircraft With Cross-Leg Current Analysis." IEEE Transactions on Transportation Electrification 6, no. 4: 1528-1536.
Based on a four-phase 8/6 structure switched reluctance machine for electric vehicles, the influence of different magnetic pole distributions on iron loss and temperature field is studied here. Firstly, by fitting the core silicon sheet iron loss data of the prototype, a mathematical calculation model of switched reluctance iron loss is constructed. Then, in order to analyse the flux density waveform of the iron core, a 2D finite element model is proposed. Under different magnetic pole distributions, the magnetic flux densities of the iron core are compared and the iron loss is calculated as well. Finally, the simulation results are obtained by establishing the 2D finite element thermal model of the prototype and analysed. Then, the experimental test platform is built and experimental data are recorded and analysed. By comparing the experimental results, it is found that the temperature rise is well consistent with the temperature rise of the 2D finite element thermal model.
Wenju Yan; Hao Chen; Yongqiang Liu; Chingchuen Chan. Iron loss and temperature analysis of switched reluctance motor for electric vehicles. IET Electric Power Applications 2020, 14, 2119 -2127.
AMA StyleWenju Yan, Hao Chen, Yongqiang Liu, Chingchuen Chan. Iron loss and temperature analysis of switched reluctance motor for electric vehicles. IET Electric Power Applications. 2020; 14 (11):2119-2127.
Chicago/Turabian StyleWenju Yan; Hao Chen; Yongqiang Liu; Chingchuen Chan. 2020. "Iron loss and temperature analysis of switched reluctance motor for electric vehicles." IET Electric Power Applications 14, no. 11: 2119-2127.
This study presents comparative researches on performances of a double-sided switched reluctance linear machine (DSRLM) under different winding connection modes. The static self/mutual inductances of a 6/4 yokeless DSRLM under two winding connection modes are calculated through the finite element method (FEM). This DSRLM can work either as a motor or as a generator. Now the performances of the DSRLM under different winding connection modes, including the force ripple in the electric model and the output voltage ripple in generation model, are compared through an established electric model and an established generation model. In addition, the iron losses under different winding connections are also investigated. Dynamic magnetic flux density waveforms of the DSRLM are calculated via FEM, and an iron loss computation module is established. Simulation results indicate that the advantages of both winding connections reflect in different aspects. This study summarises how to select a proper winding connection mode of DSRLMs for different performance demands responding to different applications. The experimental validations are conducted on a prototype DSRLM finally.
Rui Nie; Hao Chen; Wenmin Zhao; Jinfu Liu; Shuyan Zhao; Jiacheng Tian; Xing Wang; Jingxin Zhang. Comparative researches on double‐sided switched reluctance linear machines with different winding connections. IET Electric Power Applications 2020, 14, 2082 -2091.
AMA StyleRui Nie, Hao Chen, Wenmin Zhao, Jinfu Liu, Shuyan Zhao, Jiacheng Tian, Xing Wang, Jingxin Zhang. Comparative researches on double‐sided switched reluctance linear machines with different winding connections. IET Electric Power Applications. 2020; 14 (11):2082-2091.
Chicago/Turabian StyleRui Nie; Hao Chen; Wenmin Zhao; Jinfu Liu; Shuyan Zhao; Jiacheng Tian; Xing Wang; Jingxin Zhang. 2020. "Comparative researches on double‐sided switched reluctance linear machines with different winding connections." IET Electric Power Applications 14, no. 11: 2082-2091.
A problem of the switched reluctance drive is its natural torque pulsations, which are partially solved with finite control set model predictive control strategies. However, the continuous control set model predictive control, required for precise torque stabilization and predictable power converter behavior, needs sufficient computation resources, thus limiting its practical implementation. The proposed model predictive control strategy utilizes offline processing of the magnetization surface of the switched reluctance motor. This helps to obtain precalculated current references for each torque command and rotor angular position in the offline mode. In online mode, the model predictive control strategy implements the current commands using the magnetization surface for fast evaluation of the required voltage command for the power converter. The proposed strategy needs only two lookup table operations requiring very small computation time, making instant execution of the whole control system possible and thereby minimizing the control delay. The proposed solution was examined using a simulation model, which showed precise and rapid torque stabilization below rated speed.
Alecksey Anuchin; Galina L. Demidova; Chen Hao; Alexandr Zharkov; Andrei Bogdanov; Václav Šmídl. Continuous Control Set Model Predictive Control of a Switch Reluctance Drive Using Lookup Tables. Energies 2020, 13, 3317 .
AMA StyleAlecksey Anuchin, Galina L. Demidova, Chen Hao, Alexandr Zharkov, Andrei Bogdanov, Václav Šmídl. Continuous Control Set Model Predictive Control of a Switch Reluctance Drive Using Lookup Tables. Energies. 2020; 13 (13):3317.
Chicago/Turabian StyleAlecksey Anuchin; Galina L. Demidova; Chen Hao; Alexandr Zharkov; Andrei Bogdanov; Václav Šmídl. 2020. "Continuous Control Set Model Predictive Control of a Switch Reluctance Drive Using Lookup Tables." Energies 13, no. 13: 3317.
In order to improve the fault-resilient capacity of the switched reluctance starter/generator systems, this paper presents a fault diagnosis and tolerant strategy for position sensors of the system. The fault diagnosis method, based on capturing the pulse edges of the position signals, has very high flexibility and reliability. Moreover, a fault tolerant control strategy for position sensors is proposed, which can be used in non-uniform variable speed conditions. The principle of the proposed fault tolerant control strategy is to record three adjacent time intervals, updated in each edge of position signals, and then the fourth time interval can be obtained according to the three adjacent time intervals. In case of position sensors having fault, fault tolerant control strategy can be realized by reconstructing failure position signals, based on the fourth time interval. Therefore, the system can operate without deterioration of the system performance under faulty condition of position sensors. Hence, the resilient capability and reliability of switched reluctance starter/generator systems are greatly improved with the proposed fault diagnosis and tolerant control strategy. Experimental results have verified the effectiveness and feasibility of the proposed fault diagnosis and tolerant control strategy.
Hao Chen; Guorui Guan; Guoqiang Han; Haobiao Chen. Fault Diagnosis and Tolerant Control Strategy for Position Sensors of Switched Reluctance Starter/Generator Systems. IEEE Transactions on Transportation Electrification 2020, 6, 1508 -1518.
AMA StyleHao Chen, Guorui Guan, Guoqiang Han, Haobiao Chen. Fault Diagnosis and Tolerant Control Strategy for Position Sensors of Switched Reluctance Starter/Generator Systems. IEEE Transactions on Transportation Electrification. 2020; 6 (4):1508-1518.
Chicago/Turabian StyleHao Chen; Guorui Guan; Guoqiang Han; Haobiao Chen. 2020. "Fault Diagnosis and Tolerant Control Strategy for Position Sensors of Switched Reluctance Starter/Generator Systems." IEEE Transactions on Transportation Electrification 6, no. 4: 1508-1518.
Hao Chen; Xuekun Liu; Wenju Yan. Three-Dimensional Magnetic Equivalent Circuit Research of Double-Sided Switched Reluctance Linear Machine. IEEE Transactions on Applied Superconductivity 2020, 30, 1 -8.
AMA StyleHao Chen, Xuekun Liu, Wenju Yan. Three-Dimensional Magnetic Equivalent Circuit Research of Double-Sided Switched Reluctance Linear Machine. IEEE Transactions on Applied Superconductivity. 2020; 30 (4):1-8.
Chicago/Turabian StyleHao Chen; Xuekun Liu; Wenju Yan. 2020. "Three-Dimensional Magnetic Equivalent Circuit Research of Double-Sided Switched Reluctance Linear Machine." IEEE Transactions on Applied Superconductivity 30, no. 4: 1-8.
The longitudinal end effect (LEE) has a negative influence on the performance of the flat-type switched-reluctance linear machines (SRLMs). For example, it can give rise to the imbalance of peak currents of different phases and the aggravation of the force ripple. This study proposes a modified current estimation model and an adaptive adjustment method (AAM) of turn-on position to compensate for the LEE of SRLMs. The modified current estimation model considers not only the self-inductance characteristics but also the mutual inductance characteristics. Some simulation results demonstrate that this modified estimation model has better estimation accuracy than a previous one. Then, the AAM of turn-on position is proposed based on this modified current estimation model. It can balance the peak currents of different phases so that the negative impact of the LEE is greatly reduced. This new control method is easy to implement and requires little test, and its effectiveness in compensating for the peak currents and reducing force ripple is experimentally verified.
Rui Nie; Hao Chen; Jinfu Liu; Wenmin Zhao; Shuyan Zhao; Jiacheng Tian; Xing Wang; Yingjie Huo. Peak current compensation for reducing the negative impact of LEE on SRLM. IET Electric Power Applications 2020, 14, 1030 -1040.
AMA StyleRui Nie, Hao Chen, Jinfu Liu, Wenmin Zhao, Shuyan Zhao, Jiacheng Tian, Xing Wang, Yingjie Huo. Peak current compensation for reducing the negative impact of LEE on SRLM. IET Electric Power Applications. 2020; 14 (6):1030-1040.
Chicago/Turabian StyleRui Nie; Hao Chen; Jinfu Liu; Wenmin Zhao; Shuyan Zhao; Jiacheng Tian; Xing Wang; Yingjie Huo. 2020. "Peak current compensation for reducing the negative impact of LEE on SRLM." IET Electric Power Applications 14, no. 6: 1030-1040.
Several tubular switched reluctance linear machines (TSRLMs) with transverse flux are proposed for improving thrust density recently. Owing to the particularity of the structure of transverse-flux TSRLMs, how to maximize the electrical utilization becomes a key to improve these machines' performance. A novel three-phase transverse-flux TSRLM is proposed in this paper, whose stator sleeve is composed of six ferromagnetic rings and five spac-er rings. And the mover is composed of an aluminum tube and several fan-shaped poles. The adjacent fan-shaped poles are placed at 120 degree intervals. In the novel structure, each half of the windings corresponding to a phase constitute a single coil without the need of intermediate connections. This winding way avoids the limitation of stator ferromagnetic ring spacing, and in-creases the space for wire placement compared with the other ex-isting transverse-flux TSRLMs. In order to verify the superiority of the novel TSRLM, a conventional transverse-flux TSRLM which has the same volume and main dimensions is presented to compare their performances. Finally, the finite element calculation results show that the average thrust per unit core mass of pro-posed TSRLM is greater than conventional TSRLM, which shows its superiority for speed control systems. It proves that the novel structure can help increasing the use of TSRLMs.
Hao Chen; Rui Nie; Wenmin Zhao; Jingfu Liu. A Novel Three-Phase Tubular Switched Reluctance Linear Machine With Transverse-Flux Path. IEEE Transactions on Applied Superconductivity 2020, 30, 1 -6.
AMA StyleHao Chen, Rui Nie, Wenmin Zhao, Jingfu Liu. A Novel Three-Phase Tubular Switched Reluctance Linear Machine With Transverse-Flux Path. IEEE Transactions on Applied Superconductivity. 2020; 30 (4):1-6.
Chicago/Turabian StyleHao Chen; Rui Nie; Wenmin Zhao; Jingfu Liu. 2020. "A Novel Three-Phase Tubular Switched Reluctance Linear Machine With Transverse-Flux Path." IEEE Transactions on Applied Superconductivity 30, no. 4: 1-6.
With the rapid development of wind power generation technology worldwide, the influence of intermittent and fluctuating characteristics of wind power generation on the microgrid and load is attracting a lot of attention along with its increasing penetration. Aimed at solving the problem that only wind speed variation is considered in the generation plan of traditional small-scale wind power generation applications, this paper presents a set of control schemes for the switched reluctance generator based small-scale wind power generation system with the integrated energy storage system. Considering the possibility of off-grid operation of small-scale wind power generation systems in the areas where the grid is weak or even uncovered, the proposed control scheme increases the consideration of dynamic changes in load and energy storage unit. To improve the utilization efficiency of small-scale wind power generation, a step control scheme is proposed combining maximum power tracking control with power balance control. The two-stage inverter is established to generate ac 110V/60Hz outputs by voltage closed-loop control in boost circuit of front stage and PI control in the inverter circuit of the second stage. Finally, the effectiveness of the proposed control schemes is verified experimentally.
Hao Chen; Deguang Xu; Xin Deng. Control for Power Converter of Small-Scale Switched Reluctance Wind Power Generator. IEEE Transactions on Industrial Electronics 2020, 68, 3148 -3158.
AMA StyleHao Chen, Deguang Xu, Xin Deng. Control for Power Converter of Small-Scale Switched Reluctance Wind Power Generator. IEEE Transactions on Industrial Electronics. 2020; 68 (4):3148-3158.
Chicago/Turabian StyleHao Chen; Deguang Xu; Xin Deng. 2020. "Control for Power Converter of Small-Scale Switched Reluctance Wind Power Generator." IEEE Transactions on Industrial Electronics 68, no. 4: 3148-3158.
This paper proposes a novel reliability evaluation scheme to achieve quantitative reliability calculation for power converter in the whole operation region of switched reluctance motor (SRM) system. Firstly, the electrical model is built to obtain electrical stress and fault-tolerance capability in Matlab/Simulink environment. Secondly, thermal circuit model is performed to get the thermal stress of power converter quickly. Thirdly, dynamical Markov model with a novel failure criterion is applied to achieve quantitative reliability calculation by characterizing the fault-tolerance capability and thermal stress. The proposed failure criterion can simplify the model to decrease the number of states and avoid the divergence of results. Especially the interconnected relationship of the three models is key emphasized. Next, the proposed reliability evaluation scheme is carried out to explore the reliability of power converter under different chopping modes. Finally, simulations in conjunction with experiment verifies the validity of the proposed reliability evaluation scheme.
Hao Chen; Shuai Xu; Sihang Cui. Reliability Evaluation for Power Converter of SRM on Fault-Tolerance Capability and Thermal Stress. IEEE Transactions on Industrial Electronics 2020, 68, 1749 -1758.
AMA StyleHao Chen, Shuai Xu, Sihang Cui. Reliability Evaluation for Power Converter of SRM on Fault-Tolerance Capability and Thermal Stress. IEEE Transactions on Industrial Electronics. 2020; 68 (2):1749-1758.
Chicago/Turabian StyleHao Chen; Shuai Xu; Sihang Cui. 2020. "Reliability Evaluation for Power Converter of SRM on Fault-Tolerance Capability and Thermal Stress." IEEE Transactions on Industrial Electronics 68, no. 2: 1749-1758.
A novel single phase tubular permanent magnet linear generator (TPMLG) for Stirling engines is proposed in this paper. It has an outer-stator, an inner-stator, a mover and a bread type winding which has no cutting. The mover consists of four ring-shaped permanent magnets, all of which are polarized radially. The po-larization direction of the outer two permanent magnets is oppo-site to that of the inner two to form more magnetic circuits and achieve higher power generation density. The polarized directions of the two adjacent permanent magnets of both the outside and inside are opposite. The structure, dimensional parameters and operation characteristics of the generator are illustrated in detail. One of the structural advantages of this generator is that it is easy to control. The 3-D finite element (FE) model of proposed TPMLG is established. The model and its boundary conditions are presented and explained in detail. Through the FE model, its electromagnetic analysis is carried out. The performance of this generator under reciprocating frequency 75Hz is investigated and analyzed. The simulation results show that the generator has the advantages of high power density.
Hao Chen; Shuyan Zhao; Haiying Wang; Rui Nie. A Novel Single-Phase Tubular Permanent Magnet Linear Generator. IEEE Transactions on Applied Superconductivity 2020, 30, 1 -5.
AMA StyleHao Chen, Shuyan Zhao, Haiying Wang, Rui Nie. A Novel Single-Phase Tubular Permanent Magnet Linear Generator. IEEE Transactions on Applied Superconductivity. 2020; 30 (4):1-5.
Chicago/Turabian StyleHao Chen; Shuyan Zhao; Haiying Wang; Rui Nie. 2020. "A Novel Single-Phase Tubular Permanent Magnet Linear Generator." IEEE Transactions on Applied Superconductivity 30, no. 4: 1-5.
This study presents a non-linear modelling method for a switched reluctance linear machine (SRLM), which achieves high modelling precision while requiring no prior knowledge regarding the specific structural dimensions of an SRLM. The proposed modelling method provides accurate flux linkage data based on limited experimental measurements through an interpolation process using a variant sigmoid function. The accuracy of the interpolation process is further increased by considering mutual coupling among the three phases. The performance of the proposed method is validated experimentally by comparing it with the performances of the Fourier series method and the two-dimensional finite element method. The results demonstrate that the proposed method achieves greater modelling precision than the other methods considered in modelling an SRLM.
Rui Nie; Hao Chen; Haiying Wang; Shuyan Zhao; Xing Wang; Vitor Pires; João Martins; Yassen Gorbounov. High‐precision non‐linear modelling method for a switched reluctance linear machine by interpolation with using variant sigmoid function. IET Electric Power Applications 2020, 14, 512 -522.
AMA StyleRui Nie, Hao Chen, Haiying Wang, Shuyan Zhao, Xing Wang, Vitor Pires, João Martins, Yassen Gorbounov. High‐precision non‐linear modelling method for a switched reluctance linear machine by interpolation with using variant sigmoid function. IET Electric Power Applications. 2020; 14 (3):512-522.
Chicago/Turabian StyleRui Nie; Hao Chen; Haiying Wang; Shuyan Zhao; Xing Wang; Vitor Pires; João Martins; Yassen Gorbounov. 2020. "High‐precision non‐linear modelling method for a switched reluctance linear machine by interpolation with using variant sigmoid function." IET Electric Power Applications 14, no. 3: 512-522.
Reliability has been a dominant factor in the performance of power converters. In this study, an enhanced k-out-of-n:G model is presented to predict and analyse the reliability of typical asymmetric half-bridge power converter in switched reluctance motor drive. First, the reliability estimation procedure is introduced including electrothermal model, failure rate model, and reliability model, during which the electrothermal model is critical to accelerate the process of reliability prediction. Next, the enhanced k-out-of-n:G model can be built, and corresponding solving process is derived. Meanwhile, the reliability comparison is quantitatively illustrated between conventional k-out-of-n:G models, generally accepted Markov model, and enhanced k-out-of-n:G model, indicating the result with the proposed model is consistent with Markov model. Moreover, the modelling and solving processes are simpler. Then, the reliability is optimised in respect to turn-on angle, turn-off angle, and fault-tolerance strategies with the enhanced k-out-of-n:G model, providing a guideline to select the most effective control parameters and strategies for reliability improvement. Finally, the fault experiments and thermal stress measurement are carried out to indirectly validate the reliability analysis.
Shuai Xu; Hao Chen; Feng Dong. Converter‐level reliability prediction and analysis in switched reluctance motor drive. IET Electric Power Applications 2020, 14, 500 -511.
AMA StyleShuai Xu, Hao Chen, Feng Dong. Converter‐level reliability prediction and analysis in switched reluctance motor drive. IET Electric Power Applications. 2020; 14 (3):500-511.
Chicago/Turabian StyleShuai Xu; Hao Chen; Feng Dong. 2020. "Converter‐level reliability prediction and analysis in switched reluctance motor drive." IET Electric Power Applications 14, no. 3: 500-511.
Traditional linear machines are under great influence of longitu-dinal end effect because of their finite stacking lengths in trans-verse and longitudinal directions. Longitudinal end effect causes imbalance of phase performance so that linear machine's force fluctuation is aggravated. The negative impact of longitudinal end effect on a flat type switched reluctance linear machine (SRLM) is verified in this paper. In order to avoid this problem, a novel tubular switched reluctance linear machine (TSRLM) is proposed, which can shield from unexpected impact of end effect. In struc-ture, there is no transverse cut in tubular linear machines, so tubular linear machines are not influenced by transverse end ef-fect. The stator sleeve of proposed TSRLM includes six ferro-magnetic rings and five spacer rings. The mover is composed of an aluminum tube and several fan-shaped poles. The adjacent fan-shaped poles are placed at 120 degree intervals. The equiva-lent magnetic circuit of this TSRLM is analyzed in this paper, which proves that the TSRLM is not influenced by longitudinal end effect. A prototype is manufactured, and its corresponding hardware platform is established. A series of simulations and ex-periments verify that there is no deviation performance among phases. Traditional longitudinal end effect in linear machines caused by longitudinal cuts can be thoroughly evaded in pro-posed TSRLM.
Hao Chen; Rui Nie; Jingfu Liu; Wenmin Zhao; Zhongzheng Yuan; Jiacheng Tian. A Novel Tubular Switched Reluctance Linear Machine Shielding From Longitudinal End Magnetic Effect. IEEE Transactions on Applied Superconductivity 2020, 30, 1 -7.
AMA StyleHao Chen, Rui Nie, Jingfu Liu, Wenmin Zhao, Zhongzheng Yuan, Jiacheng Tian. A Novel Tubular Switched Reluctance Linear Machine Shielding From Longitudinal End Magnetic Effect. IEEE Transactions on Applied Superconductivity. 2020; 30 (4):1-7.
Chicago/Turabian StyleHao Chen; Rui Nie; Jingfu Liu; Wenmin Zhao; Zhongzheng Yuan; Jiacheng Tian. 2020. "A Novel Tubular Switched Reluctance Linear Machine Shielding From Longitudinal End Magnetic Effect." IEEE Transactions on Applied Superconductivity 30, no. 4: 1-7.