A self-designed and developed 12/10 switched reluctance motor(SRM)is chosen as the object of study and a prototype of 2.5?kW switched reluctance starter/generator with fly-wheel is designed based on the requirements o...A self-designed and developed 12/10 switched reluctance motor(SRM)is chosen as the object of study and a prototype of 2.5?kW switched reluctance starter/generator with fly-wheel is designed based on the requirements of the selected engine (Changan Aotooc three-cylinder engine wagon) for the starter, generator and drive. The 36?V/42 V DC source system is applied to establishing the simulation-analyzing model of the motor. A finite-element (FE) analysis of its two-dimensional electromagnetic field is conducted to obtain the exact model of the motor. Systematic simulation is carried out combining with its power conversion circuit and control element. Meanwhile the starting process and performance of the system are studied and analyzed with special efforts. Satisfactory result is derived from the testing of the prototype: theoretical analysis is basically matched with the tested data, which proves the rationality and feasibility of the design procedures, systematic modeling and control strategies. Therefore, the new 12/10-structure scheme is put forward based on the development and analysis of various SRM and it meets the requirements of the researched motor in terms of the structural parameters.展开更多
简单分析了电动助力转向(EPS)系统的结构与工作原理,介绍了EPS系统无刷直流电机(brushless DC motor,BLDC motor)的电路构成和控制方法。设计开发了采用单片机进行控制,车载蓄电池供电,用MOSFET构成的三相逆变器驱动的EPS控制系统的电...简单分析了电动助力转向(EPS)系统的结构与工作原理,介绍了EPS系统无刷直流电机(brushless DC motor,BLDC motor)的电路构成和控制方法。设计开发了采用单片机进行控制,车载蓄电池供电,用MOSFET构成的三相逆变器驱动的EPS控制系统的电控单元(ECU)。详细介绍了硬件电路和软件的设计,最终通过EPS台架实验,验证了所采用的PWM控制策略对EPS系统助力转向过程的有效控制。该系统实现简单,具有较强的实用性和经济性。展开更多
汽车电动助力转向系统(Electric Power Steering System,简称EPS)采用阻尼控制可以防止直线行驶时因外界干扰引起的转向盘抖动,同时还能避免高速行驶转向回正过程中转向盘回正超调。实现阻尼控制的传统方法是采用固定占空比将电机绕组...汽车电动助力转向系统(Electric Power Steering System,简称EPS)采用阻尼控制可以防止直线行驶时因外界干扰引起的转向盘抖动,同时还能避免高速行驶转向回正过程中转向盘回正超调。实现阻尼控制的传统方法是采用固定占空比将电机绕组短路形成阻尼力矩。但该方法会使id,iq电流出现波动,从而引起转矩波动,使转向盘手感变差。根据逆变器施加于电机上的电压矢量,分析了传统阻尼控制方法应用于永磁同步电机EPS时电流和转矩出现波动的原因,在此基础上提出了在旋转坐标系下引入一个虚拟制动电阻实施阻尼控制的方法。理论分析和实验结果表明,采用所提出的方法,id,iq将不再出现波动,转向盘手感得到改善。展开更多
对汽车转向系统进行受力分析,建立了不同工况下的转向盘阻力矩模型。提出了一种驾驶员理想转向盘力矩参数化特性模型,并在此基础之上对EPS(electric power steering system)助力特性曲线的设计机理进行研究。提出了以驾驶员理想转向盘...对汽车转向系统进行受力分析,建立了不同工况下的转向盘阻力矩模型。提出了一种驾驶员理想转向盘力矩参数化特性模型,并在此基础之上对EPS(electric power steering system)助力特性曲线的设计机理进行研究。提出了以驾驶员理想转向盘力矩与车速、转向盘转角、侧向加速度的关系为基础将助力特性曲线按照高速和低速分别进行设计的观点,进而基于此观点探讨了EPS助力特性曲线的产生过程,并对EPS助力特性曲线的几何特征进行了论证。展开更多
文摘A self-designed and developed 12/10 switched reluctance motor(SRM)is chosen as the object of study and a prototype of 2.5?kW switched reluctance starter/generator with fly-wheel is designed based on the requirements of the selected engine (Changan Aotooc three-cylinder engine wagon) for the starter, generator and drive. The 36?V/42 V DC source system is applied to establishing the simulation-analyzing model of the motor. A finite-element (FE) analysis of its two-dimensional electromagnetic field is conducted to obtain the exact model of the motor. Systematic simulation is carried out combining with its power conversion circuit and control element. Meanwhile the starting process and performance of the system are studied and analyzed with special efforts. Satisfactory result is derived from the testing of the prototype: theoretical analysis is basically matched with the tested data, which proves the rationality and feasibility of the design procedures, systematic modeling and control strategies. Therefore, the new 12/10-structure scheme is put forward based on the development and analysis of various SRM and it meets the requirements of the researched motor in terms of the structural parameters.
文摘简单分析了电动助力转向(EPS)系统的结构与工作原理,介绍了EPS系统无刷直流电机(brushless DC motor,BLDC motor)的电路构成和控制方法。设计开发了采用单片机进行控制,车载蓄电池供电,用MOSFET构成的三相逆变器驱动的EPS控制系统的电控单元(ECU)。详细介绍了硬件电路和软件的设计,最终通过EPS台架实验,验证了所采用的PWM控制策略对EPS系统助力转向过程的有效控制。该系统实现简单,具有较强的实用性和经济性。
文摘汽车电动助力转向系统(Electric Power Steering System,简称EPS)采用阻尼控制可以防止直线行驶时因外界干扰引起的转向盘抖动,同时还能避免高速行驶转向回正过程中转向盘回正超调。实现阻尼控制的传统方法是采用固定占空比将电机绕组短路形成阻尼力矩。但该方法会使id,iq电流出现波动,从而引起转矩波动,使转向盘手感变差。根据逆变器施加于电机上的电压矢量,分析了传统阻尼控制方法应用于永磁同步电机EPS时电流和转矩出现波动的原因,在此基础上提出了在旋转坐标系下引入一个虚拟制动电阻实施阻尼控制的方法。理论分析和实验结果表明,采用所提出的方法,id,iq将不再出现波动,转向盘手感得到改善。
文摘对汽车转向系统进行受力分析,建立了不同工况下的转向盘阻力矩模型。提出了一种驾驶员理想转向盘力矩参数化特性模型,并在此基础之上对EPS(electric power steering system)助力特性曲线的设计机理进行研究。提出了以驾驶员理想转向盘力矩与车速、转向盘转角、侧向加速度的关系为基础将助力特性曲线按照高速和低速分别进行设计的观点,进而基于此观点探讨了EPS助力特性曲线的产生过程,并对EPS助力特性曲线的几何特征进行了论证。
