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1. Electromagnetic Performance Analysis of Axial Field Flux-Switching Fault-Tolerant Machine Using Equivalent Magnetic Circuit Method | |||
LIN Mingyao,XU Da | |||
Dynamic and Electronic Engineering 26 May 2016 | |||
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Abstract:In this paper, the electromagnetic performances of a novel axial field flux-switching fault-tolerant (AFFSFT) machine are investigated based on equivalent magnetic circuit (EMC) method. A nonlinear EMC model of the AFFSFT machine is proposed and built, and the static characteristics of the machine, including the air-gap flux density, permanent magnetic flux linkage, back electromotive force (EMF) and inductance characteristics are analyzed. The calculated results are compared with those predicted by finite element method (FEM). Experiments are done with a prototype. The analysis results are consistent with the experimental results well, verifying the feasibility of the EMC method. | |||
TO cite this article:LIN Mingyao,XU Da. Electromagnetic Performance Analysis of Axial Field Flux-Switching Fault-Tolerant Machine Using Equivalent Magnetic Circuit Method[OL].[26 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4694064 |
2. A Methodology of Iron Loss Calculation for Permanent Magnet Linear Synchronous Machine | |||
Xu mingfei,Hu Minqiang,Yu Haitao | |||
Dynamic and Electronic Engineering 07 December 2015 | |||
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Abstract:In order to calculate the iron loss of PMLSM, a novel methodology based on FEA, 8 fast Fourier transformation and fuzzy computation was proposed. The mathematical model of linear motor was established, including the flux linkage equation and voltage equation, electromagnetic thrust equation so that PMLSM is well understood. Then 5 steps were taken to resolve the problem of iron loss, and the calculation method for 8 fast Fourier transformation and fuzzy computation was researched in this paper. Simulation and calculation was performed to calculate the iron loss, 8FFT can greatly improve the computing speed and calculate harmonic content firstly. Secondly, fuzzy calculation has greatly improved the intelligence and accuracy of the calculation for iron loss. Finally, the figures of iron loss show that the iron loss rises as the force ranges from 10N to 80N. In addition, the iron loss also rises greatly as the frequency ranges from 5 to 500Hz for different force. | |||
TO cite this article:Xu mingfei,Hu Minqiang,Yu Haitao. A Methodology of Iron Loss Calculation for Permanent Magnet Linear Synchronous Machine[OL].[ 7 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4667771 |
3. The pulse exciting source and its application in electromagnetic acoustic emission | |||
Zhang Chuang,Li Fubiao,Liu Suzhen,Cai Zhichao,Xiao Yang | |||
Dynamic and Electronic Engineering 29 October 2015 | |||
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Abstract:Electromagnetic loading in the metal structures will produce stress wave signal at the edge of the crack and this phenomenon can be used in nondestructive testing of metal defects. As the core of electromagnetic load, the output parameters of the exciting source, such as current frequency and amplitude, have a significant impact on loading effect. For the loading demand of the electromagnetic acoustic emission (EMAE), using the energy storage of the capacitor, the pulse high current which the EMAE needs can be achieved by capacitor discharging instantaneous. It designs the adjustable regulated power supply based on semi-bridge switching circuit principle. The parameter display and adjustment module can be achieved based on the single-chip system. Applying to the EMAE experiment, it can reach the expected target.????? | |||
TO cite this article:Zhang Chuang,Li Fubiao,Liu Suzhen, et al. The pulse exciting source and its application in electromagnetic acoustic emission[OL].[29 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4659531 |
4. Self-Constructing Feedback Fuzzy Neural Network based PMLSM Controller Design | |||
ZhangRu | |||
Dynamic and Electronic Engineering 24 April 2015 | |||
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Abstract:Self-constructing feedback fuzzy neural network controller (SCFFNNC) is designed to aim at the parameter uncertainties for permanent magnet linear synchronous motor (PMLSM) since they cause negative influence to the dynamic performance of PMLSM servo system. The thought about self-constructing, in which the number of neurons for the whole structure can be able to increase on line according to the variety of error, is introduced based on combining the non-linear identification of fuzzy control with self-learning of neural network. It can reserve the self-learning abilities, improve the real-time performance for neural network and then enhance the dynamic performance of PMLSM. The simulation results show that the servo system for PMLSM based on SCFFNNC can realize quick response, high precision and strong robustness for the parameter uncertainties of PMLSM. | |||
TO cite this article:ZhangRu. Self-Constructing Feedback Fuzzy Neural Network based PMLSM Controller Design[OL].[24 April 2015] http://en.paper.edu.cn/en_releasepaper/content/4640459 |
5. High Frequency ZVZCS Resonant Inverter for High-Power HPS Lamps | |||
Yifeng Wang,Yun Zhang | |||
Dynamic and Electronic Engineering 06 January 2015 | |||
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Abstract:For the low-voltage and high-current output requirements of high-power and high-pressure sodium lamps (HPS), the paper presents a CLCL resonant inverter, to achieve zero-voltage and zero-current switching (ZVZCS) and sine wave output through resonance. The working principle for the new circuit was presented, based on achieving the soft switching conditions for the inverter switches. Then an optimization design method was investigated in this paper, which made the minimum voltage stress on the resonant components in ZVZCS condition. The theoretical and simulation results of the newly designed circuit show that all the switches work in the ZVZCS state. Besides, we got a sine waveform current output, which efficiently reduced the crest factor of the current and extended the life of the lamp. To examine the correctness of the proposed method, finally, we designed a DC-AC resonant inverter with 400V input, 100V/10A output, and 260 kHz switching frequency. The experimental result sustained the proposed configuration and the full load efficiency of the inverter can achieve 99.1% | |||
TO cite this article:Yifeng Wang,Yun Zhang. High Frequency ZVZCS Resonant Inverter for High-Power HPS Lamps[OL].[ 6 January 2015] http://en.paper.edu.cn/en_releasepaper/content/4626699 |
6. Study of Sliding Mode Controls of Acceleration of a Shaker | |||
Chen Zengshi | |||
Dynamic and Electronic Engineering 08 November 2011 | |||
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Abstract:This paper investigates sliding mode controls of the acceleration for a voice coil driven shaker. The electromechanical system is modeled. The double loop and two single loop controls are proposed, simulated and compared. Stability and robustness of the closed-loop system are analyzed, providing a guide for controller parameter selection. The simulation results show the effectiveness of the controllers. Acceleration and root mean square (RMS) current are controlled with the desired accuracy. The inverter switching loss is reduced. The different control strategies have different maximum switching frequencies, finite-convergence time, and tracking accuracies. The transient responses for a step input are predictable for all the controllers. | |||
TO cite this article:Chen Zengshi. Study of Sliding Mode Controls of Acceleration of a Shaker[OL].[ 8 November 2011] http://en.paper.edu.cn/en_releasepaper/content/4448893 |
7. Fault Line Selection Based on Improved Grey Relation Analysis for Small Current Grounding System | |||
XIN Jian,WANG Chonglin,WANG Yangyang | |||
Dynamic and Electronic Engineering 10 June 2011 | |||
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Abstract:Based on the analysis of various existing methods of fault line selection for small current grounding system and the characteristics of zero-sequence transient current in small current grounding system, a novel fault line selection method based on improved grey relation analysis is proposed. The method utilizes the zero-sequence current relation degree of power lines. Besides, an improved algorithm is proposed to enlarge the difference of relation degree of fault line and normal lines. The simulation results using PSCAD show that the method proposed can be applied to any distribution system with different grounding patterns and has large difference between fault line and normal lines. So the method has high accuracy and high ability of anti-disturbance. | |||
TO cite this article:XIN Jian,WANG Chonglin,WANG Yangyang. Fault Line Selection Based on Improved Grey Relation Analysis for Small Current Grounding System[OL].[10 June 2011] http://en.paper.edu.cn/en_releasepaper/content/4432083 |
8. Implicit Functional testing of switched current filter based on fault signatures | |||
Long Ying ,He Yigang | |||
Dynamic and Electronic Engineering 17 September 2009 | |||
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Abstract:This paper aims at defining an efficient test strategy for switched-current circuit testing. By checking the constructed signatures (impulse response samples) against the derived tolerance ranges, we can infer the correctness of the device under test (DUT) without explicitly measuring the original performance parameters. We also describe a technique of mapping the tolerance ranges in the performance space to its associated tolerance ranges in the signature space (We call such a procedure implicit functional testing). In particular, a suitable strategy for the choice of these samples has been devised taking into account their sensitivities to the circuit performance to be checked for. Taking into account the specificity of switched-current circuit, catastrophic and parametric fault model for testing is constituted. A fifth order Butterworth low-pass filter and a sixth order Elliptic band-pass filter have been used as test benches to assess the effectiveness of the proposed technique. Test results demonstrate that a high fault coverage can be achieved with a low cost test equipments. | |||
TO cite this article:Long Ying ,He Yigang . Implicit Functional testing of switched current filter based on fault signatures[OL].[17 September 2009] http://en.paper.edu.cn/en_releasepaper/content/35249 |
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