新型双凸极永磁双转子电动机的电磁性能分析

为满足混合动力汽车多能源功率传输的需求,提出了一种新型双凸极永磁型双转子电动机。在确定其结构尺寸的基础上,通过有限元分析法对电机的磁链、反电势以及电感等电磁性能进行了分析,并通过场路耦合法建立电机及其驱动控制系统的瞬态联合仿真模型,仿真结果表明该电机继承了双凸极永磁电动机优点,结构简单且具有较高的可靠性和功率密度,同时由于双转子的存在,能实现不同工况下的内、外电机能量流的合成与分配,验证了该电机在混合动力系统中的可行性,也为研究该类电机的系统控制策略提供理论基础。     

双转子电动机工作原理及数学模型

双转子电机是一种新型的能量变换装置,具有两个机械端口和两个电端口,可以灵活地实现能量传递.介绍了双转子电机的工作原理,建立了简单的数学模型,对电机的主要损耗作了分析,并就双转子电机当前研究的主要内容及技术难点作了详细的阐述,最后提出了双转子电机的研究方向.     

定子永磁式双转子电机多工况运行模式及控制策略研究

针对混合动力汽车的应用特点,提出了一种新型定子永磁式双转子电机。该电机具有无级变速功能,能实现混合动力汽车内部机械功率和电功率的组合分配,在不同路况下确保内燃机的高效运行。建立了该定子永磁式双转子电机的数学模型;研究制定了该定子永磁式双转子电机的控制策略;对该定子永磁式双转子电机在混合动力汽车应用中多种典型工况下的工作模式进行了仿真分析;研制了一台额定功率为2kW的定子永磁式双转子电机实验原理样机。仿真和实验结果表明:该定子永磁式双转子电机可以实现电启动、混合驱动和纯电动运行模式,验证了电机结构及其数学模型的正确性和控制策略的合理性,为该电机应用于混合动力汽车的进一步研究奠定了基础。     

无刷双机械端口电机原理

提出了一种创新的无刷双机械端12电机的原理设想.它保留了传统双机械端口电机的主要优点,如两个机械端口可运行在不同转速和可无极连续变速等,而取消了传统双机械端口电机中的电刷和滑环,简化了电机结构,提高了可靠性,可以设计成使两个机械转子的额定转速相差很大,从而更适用于需要低速大力矩的混合动力汽车等场合.研究了电机的"三等效电机"原理,并分析了不同工况下电机的功率流向及其控制思想.     

新型双转子永磁电机转速同步技术的研究进展

针对一种中间定子、内外双转子形式的新型对转永磁电机内外转子转速存在差异的问题,在介绍了这种新型双转子永磁电机的工作原理基础上,从机械同步、电气同步和协调设计三个方面分析了这种电机转速同步技术及其研究进展,为新型双转子永磁电机的进一步深入研究奠定基础。     

新型车用对转双转子电机的研究

研究了对转双转子电机,并利用该特种电机构建一种新的电动汽车驱动系统.分析了对转双转子电机的工作原理.以永磁同步对转双转子电机为例,设计了永磁同步对转双转子电机以及基于它的驱动桥的结构;建立了电机在电动车上应用的数学模型和基于Matlab/Simulink的电机的控制系统模型;针对汽车阻力突变和汽车转弯两种工况作了仿真,并对仿真结果进行了分析,提出了结论.     

新型定子永磁式双转子电机运行模式分析与实验研究

提出一种混合动力汽车(hybrid electric vehicle,HEV)用新型定子永磁式双转子电机(stator-permanent-magnet double-rotor motor,SPM-DRM),采用双凸极式电机结构简化了中间转子,有效提高中间转子的机械强度,并克服了双转子永磁同步电机研究中存在的中间转子永磁体散热难的问题。分析SPM-DRM应用于HEV的能量传递原理,结合有限元分析所得电机电磁参数,建立了 SPM-DRM 的数学模型,仿真分析了 SPM-DRM 的多工况运行模式;研制了实验原理样机并搭建基于 SPM-DRM 的动力混合系统实验平台,完成起动运行、纯电动驱动、混合驱动等多种典型工况的实验与分析。实验结果验证了理论分析的正确性、样机设计和控制策略的合理性。为该类电机实际应用于混合动力汽车的进一步研究提供参考。     

铸铜转子双三相异步电动机设计与优化

以新型电动车用驱动电机为设计目标,利用有限元软件建立铸铜转子双三相异步电动机二维电磁仿真模型,计算电机的峰值输出转矩和功率。对比分析铸铜转子与铸铝转子在效率方面的差异,进一步计算电机的效率分布,通过调节定子和转子槽型来优化电机的效率分布,使电机的最高效区域分布在电动车的常用工况区;对比分析对称电压供电情况下,双三相定子绕组与三相定子绕组在一相忽然断路时对电机转矩的影响,并给出双三相电机缺相运行时的控制策略。以电机的实测数据来验证仿真计算的正确性,电机输出特性满足电动汽车需求。     

双馈磁阻电机的运行原理与调速特性

双馈磁阻电机是在近几年发展起来的一种新型电机.文中详细描述了该种电机的定转子结构,导出了相应的等效电路,对它的电感参数、调速机理和能量流通关系进行了分析.最后给出了实验样机的调速特性.     

无刷双馈变频调速电机的原理分析

目前，一种能够很大程度降低变频调速系统成本的新型无刷双馈变调速电机正为国内外工程界人士所瞩目。这种无刷双馈变频调速电机通过适当改变传统笼型感应电机的定、转子绕组结构，就可以实现用较小容量的变频器控制较大容量电机平滑调速的功能。本文将着重分析该电机的工作原理，介绍该电机的定、转子绕组结构以及两种极对数的选择和变频器中功率流向的问题。     

Control of the dual mechanical port electrical machine and its applications in hybrid electrical vehicle

This paper deals with the control strategy of the dual mechanical port electrical machine (DMPEM) which is suitable for hybrid electrical vehicles. In particular, it discusses the power management algorithm of the electrical variable transmission (EVT) system based on DMPEM. Also an equivalent circuit of DMPEM has been proposed for the first time, which gives clear physical meanings to all components in the circuit. The power flow of DMPEM under different operating conditions is analyzed from the equivalent circuit. The proposed control strategy is validated on a simulated EVT experiment platform. The result proves its validity. © 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

Grid-connected Control Strategies for a Dual Power Flow Wind Energy Conversion System

A novel dual power flow (DPF) wind energy conversion system (WECS) based on an electrical variable transmission (EVT) machine is proposed recently. The structure of the novel EVT-based WECS, especially the grid-connected configuration, is different from any other existing WECSs. In this paper, the grid-connected control strategies of the DPF- WECS are proposed by controlling the DC-link and the inner rotor side converter, where the DC-link with and without the energy storage system (ESS) is considered separately. The relevant control strategies are presented to enhance the grid fault ride through capability of the DPF-WECS. Moreover, the maximum power point tracking control strategy and the pitch control strategy are also studied to implement the complete functionality of the DPF-WECS. The simulation model of the DPF-WECS is developed based on the EVT mathematical models and proposed control strategies. Finally, the simulation results verify the efficiency of the proposed control strategies for the DPF-WECS.     

基于电无级变速器的内燃机最优控制策略及整车能量管理

提出了一种基于电无级变速器的混合动力汽车内燃机最优控制策略。首先分析了电无极变速器的核心组成部件—双机械端口电机的数学模型,随后在搭建的实验平台上进行了控制策略的验证试验。结果表明,所述控制策略可以确保内燃机的工作状态不受外界负载变化的影响。本文进一步介绍了一种基于整车的能量管理方案,分析了几种主要工况下各组件的工作状态,提出了在不同工况下电无级变速器系统的控制策略。最后,通过实验模拟了各工况下的运行情况,证明所述策略的可行性。     

A hierarchical coordinated control strategy based on multi-port energy router of urban rail transit

The multi-port energy router (ER) is an effective topology for integrating train traction load, AC load, the energy storage system and photovoltaic(PV) energy. The start and stop process of urban rail transit trains and the access of distributed energy sources to rail transit ER lead to serious fluctuations of DC bus power, so it is necessary to route energy between different ports, involving multi-operating modes, while seamless switching is a major challenge. In this paper, a hierarchical coordinated control strategy is proposed to enable the multi-port ER to operate in a coordinated fashion under the conditions of train parking, acceleration, constant power driving and deceleration, and to switch seamlessly under various working conditions. The energy central dispatching layer sends working condition instructions by sampling the state information of each port, while the microgrid control layer adopts centralized control, receiving upper working condition instructions and sending drive signals to the local control layers to maintain the balanced energy flow of each port. In the local control layers, the PV adopts the improved perturbation and observation method of power control (PC-P&O), while the ES system adopts voltage loop control with an SOC influence factor, voltage loop control with switching factor and power loop control according to the different working conditions, so as to transmit the required train load power accurately and maintain the stability of the DC bus voltage. Finally, the effectiveness of the proposed hierarchical coordination control is verified by MATLAB/Simulink simulations.     

A hierarchical coordinated control strategy based on multi-port energy router of urban rail transit

The multi-port energy router (ER) is an effective topology for integrating train traction load, AC load, the energy storage system and photovoltaic(PV) energy. The start and stop process of urban rail transit trains and the access of distributed energy sources to rail transit ER lead to serious fluctuations of DC bus power, so it is necessary to route energy between different ports, involving multi-operating modes, while seamless switching is a major challenge. In this paper, a hierarchical coordinated control strategy is proposed to enable the multi-port ER to operate in a coordinated fashion under the conditions of train parking, acceleration, constant power driving and deceleration, and to switch seamlessly under various working conditions. The energy central dispatching layer sends working condition instructions by sampling the state information of each port, while the microgrid control layer adopts centralized control, receiving upper working condition instructions and sending drive signals to the local control layers to maintain the balanced energy flow of each port. In the local control layers, the PV adopts the improved perturbation and observation method of power control (PC-P&O), while the ES system adopts voltage loop control with an SOC influence factor, voltage loop control with switching factor and power loop control according to the different working conditions, so as to transmit the required train load power accurately and maintain the stability of the DC bus voltage. Finally, the effectiveness of the proposed hierarchical coordination control is verified by MATLAB/Simulink simulations.     

级联式无刷双馈电机的建模与仿真

无刷双馈电机是一种适应风机、水泵调速节能驱动最有效的电机形式,有着很好的应用前景。针对级联式无刷双馈电机,详尽地推导了实用的数学模型,并采用数字仿真验证了该模型的正确性,为今后该类电机控制策略的研究及具体实现提供了理论基础。     

五端口能源路由器控制策略研究

随着可再生能源技术的发展,传统的电力系统无法满足未来供电多样化、能量多向流动的技术要求。为了实现可再生能源的大规模消纳,我国正在积极发展能源互联网。能源互联网的核心装置是基于电力电子技术的能源路由器,能够实现给不同的可再生能源装置和不同负载提供灵活多样化的电气接口,还可实现能量的多向流动和对功率流的管理。文中对应用于中低压交直流电网且结合了储能装置的能源路由器进行了研究。为了满足中低压交直流互联功能与储能功能,所研究能源路由器由模块化多电平变流器(MMC)、双有源全桥变流器(DAB)、低压逆变器与双向储能变流器构成。文中对该能源路由器的控制策略进行了研究,设计了各级控制器的结构与控制器参数,并在各级自身控制策略的基础上,提出了功率前馈控制策略以减小直流端口的电压波动,并进行了仿真验证。     

无刷双馈电机的功率研究

无刷双馈电机（简称BDFM）是近年发展起来的新型交流电机,它在大型电力驱动和风力发电领域具有很好的应用前景。在详细分析无刷双馈电机的电磁关系和稳态等效电路基础上,利用相量图对BDFM的能量可逆过程进行了研究,并对BDFM在各种速度和电动、发电状态下的功率平衡与功率流程关系进行了详细分析,为BDFM的控制与应用奠定了理论基础。     

一种电动汽车能量高效回馈制动方法

为提高电动汽车的能量利用率,提出了一种将可变电压系统作为电机驱动系统实现能量回馈的方法,利用可串并联切换的超级电容器组与双向直流功率变换器相结合,采用了2种回馈制动模式的控制策略,提高了电机到驱动系统电源之间能量流的传递效率和变换效率,实现了速度大范围变化的能量回馈。与常规制动方法相比,上述方法具有驱动系统体积小、成本低、能量回馈效率高的特点,通过计算机仿真对采用不同回馈制动方法时的3种情况进行了对比分析,仿真结果验证了该方法的可行性和有效性。     

Adaptive fractional integral terminal slidingmode power control of UPFC in DFIG windfarm penetrated multimachine powersystem

With an aim to improve the transient stability of a DFIG wind farm penetrated multimachine power system (MPN), an adaptive fractional integral terminal sliding mode power control (AFITSMPC) strategy has been proposed for the unified power flow controller (UPFC), which is compensating the MPN. The proposed AFITSMPC controls the dq- axis series injected voltage, which controls the admittance model (AM) of the UPFC. As a result the power output of the DFIG stabilizes which helps in maintaining the equilibrium between the electrical and mechanical power of the nearby generators. Subsequently the rotor angular deviation of the respective generators gets recovered, which significantly stabilizes the MPN. The proposed AFITSMPC for the admittance model of the UPFC has been validated in a DFIG wind farm penetrated 2 area 4 machine power system in the MATLAB environment. The robustness and efficacy of the proposed control strategy of the UPFC, in contrast to the conventional PI control is vindicated under a number of intrinsic operating conditions, and the results analyzed are satisfactory.