摘要
针对液力缓速器结构复杂、价格高,传统电涡流缓速器制动力矩热衰退严重等问题,提出一种液冷自励式电磁缓速器结构,建立其制动系统以及发电系统分析模型,分析了系统的磁路结构,利用有限元法分别对电磁场模型、制动特性以及温度场进行分析。设计了2 000 N·m样机并进行台架试验,对缓速器制动特性以及发电机特性进行测试,测试结果与有限元分析计算结果的误差在6%以内,在制动功率为180 k W时水道温度为85℃,持续制动时制动力矩热衰退仅为10.4%。在1 500 r/min时制动力矩达到最大值2 000 N·m,而汽车电源只需提供给发电机的励磁功率为720 W。
In order to overcome the complicated structure and high prices of the hydraulic retarder and the serious thermal recession problem of braking torque of the conventional eddy current brake, a self- excited and liquid-cooled eddy current retarder （SL- ECR） structure was proposed. The model of braking system and generating system of the SL - ECR was established and the magnetic circuit structure was analyzed. The electromagnetic field model, the braking performance and thermal field of the SL - ECR were analyzed by using finite element method. A 2000 N·m SL - ECR was produced and tested. The braking performance and the generator performance were tested. The results show that the difference between the finite element analysis results and the experiment results was 6%. The temperature of the water wipe was 85 ℃ when the braking power was 180 kW. The braking torque decreased by 10.4% in the continuous braking stage. The braking torque could reach 2 000 N·m when the speed was 1 500 r/min and the coil current was 30 A, while the excitation power was only 720 W by the vehicle.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2014年第11期20-26,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(51277005)
关键词
自励式
缓速器
电磁场
液冷
Self-excited
Retarder
EleCtromagnetic field
Liquid-cooled
