城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427018

Murat Senol, R. D. De Doncker

{"title":"Drivetrain integrated dc-dc converter utilizing the zero sequence current of the starter-generator in 48V network vehicles","authors":"Murat Senol, R. D. De Doncker","doi":"10.1109/OPTIM.2015.7427018","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7427018","url":null,"abstract":"Increasing power demand due to further electrification of internal combustion engine vehicles has taken the 12 V power supply to its limits. Therefore, some major automobile manufacturers including Audi, BMW, Daimler, Porsche and Volkswagen have agreed to implement a new two voltage-level network. A starter-generator, which may optionally assist acceleration and recuperate energy during braking, is fed from a 48 V battery. Components that do not require high power are fed from a 12 V battery. A bidirectional dc-dc converter is placed between these networks so that the 48 V generator can charge the 12 V system and a 12 V jump starter can start the internal combustion engine. This paper proposes a novel topology and a control algorithm which eliminate the dc-dc converter to save cost, weight and volume. The proposed topology is a conventional three phase inverter with an additional asymmetric leg, which connects the star point of the machine to the 12 V and 48 V batteries. Power transfer between these two networks is achieved by controlling the zero sequence current of the starter-generator. This machine can be an externally excited or permanent magnet synchronous machine. Using a multiphase machine is also possible. A conventional field oriented control is applied to the machine. An additional PI controller regulates the zero sequence current by changing the duty cycle of the asymmetric half bridge. The zero sequence current determines the amount of power flowing between the batteries. This power transfer is independent of the machine speed and torque; therefore, the integrated dc-dc converter can also operate when the machine is running. The paper provides the theoretical background of the control, the details of the proposed topology, and simulation results which prove its feasibility.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"156 1","pages":"418-426"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75402527","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

Systematic evaluation of vibrational behavior of electric drive trains 电力传动系统振动特性的系统评价

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426743

D. Franck, T. Herold, S. Bohmer, M. Schroder, K. Hameyer

{"title":"Systematic evaluation of vibrational behavior of electric drive trains","authors":"D. Franck, T. Herold, S. Bohmer, M. Schroder, K. Hameyer","doi":"10.1109/OPTIM.2015.7426743","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7426743","url":null,"abstract":"The design and engineering of electrical drive trains is a multi disciplinary task. Usually several teams of different technical fields are involved in the development of new drive trains. Each team focuses on their own field of expertise. Even though the interactions of the described teams are well defined, acoustic irregularities are determined not before prototype stage frequently. This leads to the demand of systematic evaluation of the exciting sources and their transfer paths to the radiating surfaces. Once the sound radiating surfaces are identified, the main challenge is the decoupling of the excitation of different components of the drive train, such as electrical machine, gears, bearings etc. This step is crucial for the identification of design steps to improve the acoustic behavior. This paper presents a methodology to estimate structural transfer functions from the stator teeth of an electrical machine to the surface of its housing. The methodology is based on an operational transfer path approach and relies on a set of measurements where the force excitation is delivered by the machine itself. Since these forces are coupled a procedure for the decoupling of the transfer paths is presented. The whole model is in time domain and allow for the consideration of non linear structural behavior.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"71 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88419974","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: 1

Online selective harmonic minimization for cascaded Half-bridge multilevel inverter using artificial neural network 基于人工神经网络的级联半桥多电平逆变器在线选择性谐波最小化

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426985

P. Farhadi, M. Navidi, Milad Gheydi, Mehdi Pazhoohesh, H. Bevrani

引用次数: 5

Torque peak reduction and overload monitoring of induction motors in offshore drilling operations 海上钻井作业中感应电机的扭矩峰值降低和过载监测

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426962

W. Pawlus, M. Hansen, G. Hovland, M. Choux

{"title":"Torque peak reduction and overload monitoring of induction motors in offshore drilling operations","authors":"W. Pawlus, M. Hansen, G. Hovland, M. Choux","doi":"10.1109/OPTIM.2015.7426962","DOIUrl":"https://doi.org/10.1109/OPTIM.2015.7426962","url":null,"abstract":"Current drivetrain design procedures for electric actuation systems operating in offshore conditions typically consider two major requirements: to provide sufficient steady-state and maximum motor torques. As a result of this, no information regarding the transient state (e.g. during motor acceleration) is utilized when selecting drivetrain components. This leads to potentially dangerous situations when motors undergo saturation in these regions due to too high dynamic loads. A common reason for this (apart from lack of information about transient state when designing a drivetrain) is applying trapezoidal reference motion profiles that cause discontinuities in system acceleration and infinite values of jerk. To overcome this drawback, the current paper presents an application of a trigonometric scurve trajectory to lower values of torque peaks of motors operating in offshore drilling equipment. In addition, we show a method to monitor time spent by motors in overload regions. These two combined contributions allow to avoid unexpected motors saturation and verify if the components selected for a given electric actuation system will provide for a smooth machine operation. Practical significance of the presented work is demonstrated on a gripper arm mechanism of a full-scale offshore pipe handling machine. The results show not only a serious reduction in motor torque peak values when applying the trigonometric motion profiles (up to two times lower values), but also adaptation of the overall motor torque shapes to avoid too high overloads during the steady-state operation.","PeriodicalId":69201,"journal":{"name":"城市设计","volume":"25 1","pages":"393-398"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90489149","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

Analysis of fly-back PV micro-inverter and optimizing control system using Finite Gradient Descent Method 反激式光伏微型逆变器分析及有限梯度下降法优化控制系统

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7427011

Mahshid Khoshlessan, B. Asaei, B. Farhangi

引用次数: 2

Sensorless vector controlled synchronous reluctance motor fed by matrix converter 矩阵变换器无传感器矢量控制同步磁阻电动机

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426975

A. Yousefi-Talouki, G. Pellegrino

引用次数: 2

Yield and availability analysis of grid-connected photovoltaic systems - a case study for Iasi region, Romania 并网光伏系统的产量和可用性分析——以罗马尼亚雅西地区为例

城市设计 Pub Date : 2015-09-01 DOI: 10.1109/OPTIM.2015.7426955

C. Nemeş, S. Costinas