摘要
国内刮板输送机转动惯量大,启动转矩大,导致其驱动电动机的启动比较困难,普通的异步电动机难以胜任。针对该问题,研制了1 200kW隔爆型变频一体化永磁同步电动机。该电动机采用优化的电磁方案,将电磁负荷控制在合理范围内,可满足弱磁调速要求;结构设计充分考虑变频供电特点、隔爆性能要求及体积和质量限制,符合相关防爆要求,且结构紧凑;冷却方案设计充分考虑散热能力和余量,确保电动机有合理的温升限值。有限元分析结果表明,该电动机主轴挠度和强度、铁芯隔磁桥强度均在合理范围内。样机试验结果表明,该电动机具有良好的恒转矩特性和调速性能。
Domestic scraper conveyor has big rotary inertie and starting torque,which makes starting of its driving moter difficult,so the ordinary asynchronous motors cann＇t fulfill the task.In view of the problem,explosion-proof permanent magnet synchronous motor with variable-frequency drive integration was developed.The motor uses optimized electromagnetic scheme to control electromagnetic load in a reasonable range,and meet requirements of weak magnetic speed control.Characteristics of variable frequency power supply,explosion-proof performance requirements and volume and weight restrictions are fully considered during structural design,the structure is compact and in line with relevant explosion-proof requirements.Cooling capacity and margin are fully considered in cooling program design to ensure that the motor has a reasonable temperature rise limit.The results of finite element analysis show that deflection and strength of spindle,and strength of core bridge are within a reasonable range.The prototype test results show that the motor has good constant torque characteristics and speed regulation performance.
出处
《工矿自动化》
北大核心
2017年第11期98-102,共5页
Journal Of Mine Automation
关键词
刮板输送机
永磁同步电动机
变频一体化
启动转矩
弱磁调速
水冷
scraper conveyor
permanent magnet synchronous motor
variable-frequency drive integration
starting torque
speed regulation with field weakening
water cooling
