大发彩票0234太平洋下载_大发彩票0234忆

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                  JM系列船用三相异步电动机

                  JM系列船用三相异步电动机
                  产品参数:
                  产品型号: 三相异步电动机
                  额定功率:0.2KW-0.4KW
                  电压:380V
                  转速/极数:2级,4级,6级,8级
                  安装方式:立式,卧式

                  详细参数

                  由于无刷直流电动机是以自控式运行的,所以不会象变频调速下重载启动的同步电机那样在转子上另加启动绕组,也不会在负载突变时产生振荡和失步。中小容量的无刷直流电动机的永磁体,现在多采用高磁能积的稀土钕铁硼(Nd-Fe-B)材料。因此,稀土永磁无刷电动机的体积比同容量三相异步电动机缩小了一个机座号。近三十年来针对异步电动机变频调速的研究,归根到底是在寻找控制异步电动机转矩的方法,稀土永磁无刷直流电动机必将以其宽调速、小体积、高效率和稳态转速误差小等特点在调速领域显现优势。无刷直流电机因为具有直流有刷电机的特性,同时也是频率变化的装置,所以又名直流变频,国际通用名词为BLDC.无刷直流电机的运转效率,低速转矩,转速精度等都比任何控制技术的变频器还要好,所以值得业界关注.本产品已经生产超过55kW,可设计到400kW,可以解决产业界节电与高性能驱动的需求。
                    1、全面替代直流电机调速、全面替代变频器+变频电机调速、全面替代异步电机+减速机调速;
                    2、可以低速大功率运行,可以省去减速机直接驱动大的负载;
                    3、具有传统直流电机的所有优点,同时又取消了碳刷、滑环结构;
                    4、转矩特性优异,中、低速转矩性能好,启动转矩大,启动电流小;
                    5、无级调速,调速范围广,过载能力强;
                    6、体积小、重量轻、出力大;
                    7、软启软停、制动特性好,可省去原有的机械制动或电磁制动装置;
                    8、效率高,电机本身没有励磁损耗和碳刷损耗,消除了多级减速耗,综合节电率可达20%~60%,仅节电一项一年收回购置成本;
                    9、可靠性高,稳定性好,适应性强,维修与保养简单;
                    10、耐颠簸震动,噪音低,震动小,运转平滑,寿命长;
                    11、没有无线电干扰,不产生火花,特别适合爆炸性场所,有防爆型;
                    12、根据需要可选梯形波磁场电机和正旋波磁场电机。
                    
                  注意事项
                    (1)在拆卸前,要用压缩空气吹净电机表面灰尘,并将表面污垢擦拭干净。
                    (2)选择电机解体的工作地点,清理现场环境。
                    (3)熟悉电机结构特点和检修技术要求。
                    (4)准备好解体所需工具(包括专用工具)和设备。
                    (5)为了进一步了解电机运行中的缺陷,有条件时可在拆卸前做一次检查试验。为此,将电机带上负载试转,详细检查电机各部分温度、声音、振动等情况,并测试电压、电流、转速等,然后再断开负载,单独做一次空载检查试验,测出空载电流和空载损耗,做好记录。
                    (6)切断电源,拆除电机外部接线,做好记录。
                    (7)选用合适电压的兆欧表测试电机绝缘电阻。为了跟上次检修时所测的绝缘电阻值相比较以判断电机绝缘变化趋势和绝缘状态,应将不同温度下测出的绝缘电阻值换算到同一温度,一般换算至75
                    (8)测试吸收比K。当吸收比大于1.33时,表明电机绝缘不曾受潮或受潮程度不严重。为了跟以前数据进行比较,同样要将任意温度下测得的吸收比换算到同一温度。

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