采用爪极同步发电机和PWM整流器的42V汽车发电系统的磁场定向控制  

Field-Oriented Control of 42-V Automotive Power Generation System with Claw-Pole Synchronous Generator and PWM Rectifier

作　　者：芈书亮[1] 卢子广[1] 

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《装备制造技术》2008年第4期5-7,共3页Equipment Manufacturing Technology

基　　金：广西研究生科研创新项目(2007105930808M51)

摘　　要：随着汽车电器和电控设备的广泛使用,汽车电负载迅速增长,目前还被广泛使用的14V爪极同步发电机系统难以满足未来汽车对高效、高输出功率发电系统的需求。为此,提出了一种42V汽车发电系统,该系统采用已有的爪极同步发电机,由PWM升压整流器给电池组充电并向恒压直流负载供电。基于转子磁场定向控制和电势-负载匹配技术,变速时调节励磁电流使交流电压为设定值,负载变化时快速调节定子有功电流使整流器直流输出电压恒定,并有效地抑制负载突变引起的动态电压。实时仿真实验结果表明,该系统可明显地改善汽车爪极发电机系统的性能。In recent years, the demand for an increased number of vehicle functions by legislation and customer expectations has introduced many electronic control systems and electrical driven units in vehicles and has resulted in steadily increasing electrical loads. This trend re- quires stretching the capabilities of present on-beard power supplies. Today＇s claw-pole synchronous generator for the 14-V powernet is not able to meet the foreseeable future power requirements due to its inherent design limitations. A new high-power, high-efficiency alternator system is needed to meet these requirements. For this purpose, a claw-pole synchronous generator with pulse--width-medulation （PW＇M） recti- fier regulated at 42-V which charges battery and delivers power to the loads is described in this paper. An induced-voltage-load-matching technique is introduced and used in conjunction with rotor-field-oriented control principle. The excitation and stator currents are varied to control the ac induced-voltage of the generator and the de output voltage of rectifier under the conditions of variable speed and different load types. Moreover, inherent load--dump and jump--start charging transient suppression features are achieved. The proposed approaches are evaluated by the experimental results and can be used to improve performance of today＇s alternator system.

关 键 词：汽车发电 异步发电机 PWM整流器 磁场定向控制 

分 类 号：U463.63[机械工程—车辆工程]