城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426954

M. Popescu, A. Bitoleanu, V. Suru

引用次数: 21

PWM Strategy for improved natural balancing of a four-level H-bridge Flying Capacitor Converter 改进四电平h桥飞电容变换器自然平衡的PWM策略

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426747

A. Ibrayeva, V. Ten, Y. Familiant, A. Ruderman

{"title":"PWM Strategy for improved natural balancing of a four-level H-bridge Flying Capacitor Converter","authors":"A. Ibrayeva, V. Ten, Y. Familiant, A. Ruderman","doi":"10.1109/OPTIM.2015.7426747","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7426747","url":null,"abstract":"Flying capacitor based multilevel PWM converter may be an attractive choice due to the natural balancing property of the capacitor voltages. Previous research on natural balancing of a 4-level H-bridge Flying Capacitor Converter (FCC) with Phase Shifted (PS) PWM showed slow natural balancing rate for small modulation indices. Theoretical natural balancing time constant becomes infinitely large for zero output voltage (modulation index). This was probably the reason that many researchers became interested in active balancing methods for this and other capacitive multilevel voltage source inverters. The paper addresses natural voltage balancing improvement possibilities by employing modified PWM strategies different from classical PS PWM. Dramatic improvement in natural voltage balancing rate for small output voltages is achieved due to making a better use of switching states redundancy. Suggested is a family of improved PWM strategies and the best strategy is identified based on natural balancing damping rate considerations. Natural balancing mechanisms are analyzed using time domain averaging methodology that results in simple easy to interpret expressions regarding parameter influence.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"4 1","pages":"311-316"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90158029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Synchronous motor drives-a forgotten option 同步电机驱动——一个被遗忘的选项

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426740

T. Lipo, Zhentao S. Du

引用次数: 25

Design of high frequency buck converter for DC Motor Control 直流电机控制高频降压变换器的设计

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426961

L. Xheladini, A. Polat, L. T. Ergene

引用次数: 1

Spatial magnetic field polarization below balanced double-circuit linear configured power lines for six phase arrangements 平衡双回线性配置电力线下的空间磁场极化为六相排列

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427047

A. Ponnle, K. Adedeji, B. Abe, A. Jimoh

{"title":"Spatial magnetic field polarization below balanced double-circuit linear configured power lines for six phase arrangements","authors":"A. Ponnle, K. Adedeji, B. Abe, A. Jimoh","doi":"10.1109/OPTIM.2015.7427047","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7427047","url":null,"abstract":"Underground and aerial metallic pipelines that run parallel to or are placed in the vicinity of high voltage power lines, are affected by inductive coupling in which voltage is induced in the pipelines due to the time varying magnetic fields produced by the power line currents. This magnetic field below the power line is made up of vertical and horizontal components which are orthogonal in space and varies with time thereby giving rise to a rotating field which traces an ellipse in a plane perpendicular to the conductors. For buried metallic pipelines along the power line, the horizontal component of the magnetic field plays a major role in the induction. We present computation and comparison in the transverse plane, of the spatial distribution of the magnetic field below, and polarization around balanced overhead AC double-circuit power transmission lines of vertical and horizontal geometries for six different phase arrangements. The computations showed that the magnetic field horizontal component profile at ground level depends among other factors, on conductors phase arrangement as well as the geometry. Also, the field is polarized with different polarization shapes at different locations. The spatial magnetic field polarization distribution below the conductors depends, among other factors, on the conductors' phase arrangement. We concluded that in placing pipelines below AC double-circuit power lines, it is important to consider the field distribution by the phase arrangement of the line. Three-axis field measuring device is an essential tool.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"42 1","pages":"163-169"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75121756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A new ZCT-ZVT PWM interleaved DC-DC boost converter 一种新型ZCT-ZVT脉宽调制交错DC-DC升压变换器

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427026

N. S. Ting, Yakup Sahin, I. Aksoy

{"title":"A new ZCT-ZVT PWM interleaved DC-DC boost converter","authors":"N. S. Ting, Yakup Sahin, I. Aksoy","doi":"10.1109/OPTIM.2015.7427026","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7427026","url":null,"abstract":"In this paper, a new ZCT-ZVT PWM interleaved DC-DC boost converter with an active snubber cell is proposed. By considering interleaved approach, this topology minimizes the ripple of the output voltage and input current. Also, it provides to be reduced the extra current stress on the main devices. In proposed new converter, all of the semiconductor components softly turn on and turn off with Zero Voltage Switching (ZVS) or Zero Current Switching (ZCS). The main feature of proposed converter is that the extra current and voltage stresses do not occur on the main switches and main diodes. Also, the current stress on the auxiliary switch is at acceptable level. In the proposed converter, the main switch perfectly turns on with Zero Voltage Transition (ZVT) and turns off with Zero Current Transition (ZCT). Therewith, the auxiliary switch turns on with ZCS and turns off with ZVS. Additionally, the proposed converter smoothly operates under light load conditions and wide input line voltage. Another advantage of this converter is that the soft switching is achieved by just one auxiliary switch. The theoretical analysis of the proposed converter is made. The operating stages, the waveforms and the simulation results of the proposed converter operated for 1.5 kW and 100 kHz is given in detail.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"9 1","pages":"250-256"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74353864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Controlled capacitor 1-phase a.c. PM generator FEM characterization and circuit model based performance 可控电容单相交流永磁发电机有限元特性及基于电路模型的性能研究

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427053

I. Boldea, L. Tutelea, N. Muntean, A. Popa

{"title":"Controlled capacitor 1-phase a.c. PM generator FEM characterization and circuit model based performance","authors":"I. Boldea, L. Tutelea, N. Muntean, A. Popa","doi":"10.1109/OPTIM.2015.7427053","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7427053","url":null,"abstract":"This paper presents an attempt to design a high efficiency (90%) 3kW, 3000/3600rpm, 220/240Vrms, 50/60Hz, around (8+2) kg, one phase ac autonomous generator with simplified voltage control of max. (+/- 5%) steady state error. A two salient pole stator, PM rotor configuration with heavily saturated stator core was necessary to reduce the machine reactances well below 1.0 p.u., while also reducing stator weight. Only a surface PM rotor with thick magnets and 0.8 PM span per pole pitch ratio produced at full load Xd=0.30p.u. Xq=0.70p.u.(end coil leakage included) which enhanced the machine power (reactive and active) to reduce the required variable capacitor that controls the generator voltage from resistive load to 0.8 lagging power factor load. The paper introduces the new topology and a preliminary sizing methodology followed by FEM characterization with steady state performance evaluation. A circuit model with parameters imported from FEM and a PI voltage control via a terminal capacitor variation is proposed and show the capability to deliver 3kW at both 3000 and 3600rpm for 0.8 power factor RL loads, with stable response to step load transients and acceptable short circuit current.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"32 1","pages":"280-286"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91096130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Comparison of SVPWM, SPWM and HCC control techniques in power control of PMSG used in wind turbine systems 风电系统PMSG功率控制中SVPWM、SPWM和HCC控制技术的比较

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426976

N. S. Ting, Y. Yaşa, I. Aksoy, Yakup Sahin

引用次数: 12

A new Zero-Voltage-Transition PWM DC-DC boost converter 一种新型零电压转换PWM DC-DC升压变换器

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427027

N. S. Ting, I. Aksoy, Yakup Sahin

引用次数: 3

Design optimisation of flux barrier synchronous reluctance machines 磁通屏障同步磁阻电机的优化设计

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427033

T. Mohanarajah, J. Rizk, M. Nagrial, A. Hellany