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变频器的常见散(san)热方式(shi)有几种

日期(qi): 2021-09-29
浏览次(ci)数: 317

  制动单元供应商提醒您:变频器作为一种转换装置,在运行时会产生一定的功耗。这部分功耗会根据负载不同,控制方式不同,变频器的品牌和规格不同,都会有差异。数据显示变频器的功耗约为其容量的4~5%。其中逆变器部分约占50%,整流器和DC电路约占40%,控制和保护电路占5~15%。10℃法则表明,当器件温度降低10℃时,器件的可靠性将翻倍。由此可见变频器,降低温升,提高器件的可靠性,从而延长设备的使用寿命,更好地服务社会是多么重要。


  散热方法的分类


  变频器(qi)的散热(re)分为以下几种(zhong):自然散热(re)、强制风冷和(he)水冷。


  自然散热


  小容量变频(pin)器,一般(ban)采用(yong)自然散热,其使(shi)用(yong)环(huan)境应通风良好,无灰尘和易附(fu)着的(de)漂浮物。这类变频(pin)器的(de)拖动对象(xiang)多为空调风机、机床雕刻(ke)机等。其具有低(di)功率(lv)和优(you)良的(de)使(shi)用(yong)环(huan)境。


  此外(wai),采(cai)用(yong)自然散(san)热(re)(re)(re)方式的(de)变频器电容(rong)(rong)量并非都是(shi)偏小(xiao)的(de)。对于低容(rong)(rong)量变频器,J9九游会AG 可以选择一(yi)般的(de)散(san)热(re)(re)(re)器,并且要求可允许的(de)范围内,将散(san)热(re)(re)(re)面积尽(jin)可能地扩大(da),散(san)热(re)(re)(re)片之间(jian)的(de)间(jian)距要小(xiao),尽(jin)可能增大(da)散(san)热(re)(re)(re)面积。对于大(da)容(rong)(rong)量变频器,如果需要采(cai)用(yong)自然散(san)热(re)(re)(re),建议采(cai)用(yong)热(re)(re)(re)管散(san)热(re)(re)(re)器。热(re)(re)(re)管散(san)热(re)(re)(re)器是(shi)新(xin)(xin)一(yi)代新(xin)(xin)型散(san)热(re)(re)(re)器,是(shi)热(re)(re)(re)管技术与散(san)热(re)(re)(re)器技术相结合的(de)产(chan)物(wu),它的(de)散(san)热(re)(re)(re)效率极高。


  强制风冷


  强制风(feng)冷是(shi)指通过(guo)外置一台或多(duo)台风(feng)机(ji)对设(she)备(bei)外壳进行直接(jie)降温(wen)的(de)方(fang)式。由(you)于变(bian)(bian)频(pin)器在工作(zuo)时必(bi)然(ran)会产生较(jiao)多(duo)热量(liang),尤其是(shi)在长期满负(fu)载(zai)运行以及环(huan)境(jing)温(wen)度过(guo)高时更是(shi)如此(ci)(ci)。因此(ci)(ci),为了防止(zhi)变(bian)(bian)频(pin)器过(guo)热严重,J9九游会AG 还可(ke)以增加一个或多(duo)个风(feng)扇来对变(bian)(bian)频(pin)器外壳进行直接(jie)降温(wen)。这种(zhong)降温(wen)方(fang)式成本低廉,同时在不考虑(lv)成本情况下,可(ke)随意添加风(feng)扇数量(liang)加强降温(wen)效果。


  水冷


  水(shui)(shui)冷有一(yi)个进水(shui)(shui)口及出水(shui)(shui)口,散(san)热(re)(re)器内(nei)部有多(duo)条水(shui)(shui)道,这样可以充分发挥水(shui)(shui)冷的(de)优势(shi),能带走(zou)更(geng)多(duo)的(de)热(re)(re)量(liang)(liang)。这就是水(shui)(shui)冷散(san)热(re)(re)器的(de)基本(ben)原理。水(shui)(shui)冷是工业冷却的(de)一(yi)种常见方式(shi),但对于变频(pin)器设备(bei)来说,使(shi)(shi)用(yong)这种方式(shi)散(san)热(re)(re)很少,因为成本(ben)高,体积大,再加上一(yi)般变频(pin)器的(de)容(rong)量(liang)(liang)从几千(qian)伏安(an)到近100千(qian)伏安(an),很难让(rang)用(yong)户接(jie)受性价比,这种方式(shi)只(zhi)在特(te)殊场合和(he)容(rong)量(liang)(liang)极(ji)大的(de)变频(pin)器使(shi)(shi)用(yong)。


  无论采(cai)用哪(na)种散热(re)(re)方式,都要根据电机(ji)变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)的(de)容量来确(que)定其功(gong)耗来选(xuan)择合适的(de)风扇(shan)和散热(re)(re)器(qi),以达到优异的(de)性价比。同时,应充(chong)分考虑变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)中使用的(de)环(huan)境(jing)(jing)因素(su)(su)。针对恶劣环(huan)境(jing)(jing)(高(gao)(gao)温(wen)、高(gao)(gao)湿(shi)、煤矿、油田、海上平台(tai)),必须采(cai)取(qu)相应措(cuo)施,确(que)保(bao)(bao)变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)正常可(ke)靠(kao)运行。从变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)本身来看(kan),应尽可(ke)能避免不利因素(su)(su)的(de)影响(xiang)。比如可(ke)以密封灰尘(chen)和沙子的(de)影响(xiang),只有(you)散热(re)(re)器(qi)的(de)风道与外界空气接触(chu),避免了(le)对变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)内部(bu)产(chan)生影响(xiang);对于盐(yan)雾(wu)和湿(shi)度(du),变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)的(de)所有(you)部(bu)件都可(ke)以隔(ge)热(re)(re)和喷涂。对于现场作业变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi),应采(cai)取(qu)防(fang)(fang)雨、防(fang)(fang)晒(shai)、防(fang)(fang)雾(wu)和防(fang)(fang)尘(chen)措(cuo)施。对于高(gao)(gao)温(wen)高(gao)(gao)湿(shi)的(de)环(huan)境(jing)(jing),可(ke)以增加空调等设备进(jin)行降温(wen)除湿(shi),为变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)提供良好的(de)环(huan)境(jing)(jing),保(bao)(bao)证变(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)的(de)可(ke)靠(kao)运行。散热(re)(re)器(qi)散热(re)(re)效果及选(xuan)择原则的(de)探讨。

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能(neng)量回馈装置供应(ying)商提(ti)醒您(nin):自“十三五”规划实(shi)施以(yi)(yi)来,变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)(qi)(qi)产(chan)业(ye)(ye)逐渐成为(wei)了节(jie)能(neng)减排桥头堡,工业(ye)(ye)生(sheng)产(chan)过(guo)程(cheng)中变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)应(ying)用越(yue)来越(yue)多,对提(ti)高工控装备的(de)(de)(de)(de)(de)现代(dai)(dai)化和(he)自动(dong)化水(shui)平以(yi)(yi)及提(ti)高企(qi)(qi)业(ye)(ye)的(de)(de)(de)(de)(de)经济(ji)(ji)效益都(dou)有(you)积极作用。  国(guo)产(chan)变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)(qi)(qi)行(xing)业(ye)(ye)正从(cong)以(yi)(yi)往单纯的(de)(de)(de)(de)(de)提(ti)供产(chan)品开始(shi)转(zhuan)(zhuan)变(bian)(bian)(bian)为(wei)为(wei)用户提(ti)供系统化的(de)(de)(de)(de)(de)解决方案,也从(cong)高端(duan)产(chan)品进口转(zhuan)(zhuan)变(bian)(bian)(bian)为(wei)国(guo)内(nei)品牌迅(xun)速(su)崛起。除(chu)了走(zou)高端(duan)路(lu)线(xian),节(jie)能(neng)减排的(de)(de)(de)(de)(de)推广(guang)也是(shi)推动(dong)我国(guo)变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)(qi)(qi)行(xing)业(ye)(ye)发展的(de)(de)(de)(de)(de)动(dong)力,变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)技术正处于从(cong)调(diao)速(su)到节(jie)能(neng)的(de)(de)(de)(de)(de)转(zhuan)(zhuan)变(bian)(bian)(bian)过(guo)程(cheng)。  关注变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)(qi)(qi)市(shi)场(chang)的(de)(de)(de)(de)(de)一(yi)(yi)位行(xing)业(ye)(ye)专家(jia)表示,国(guo)产(chan)变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)使用越(yue)来越(yue)广(guang)泛(fan),单拿矿(kuang)用变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)(qi)(qi)来说,矿(kuang)用变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)提(ti)升系统在很(hen)多情(qing)况下是(shi)煤(mei)炭生(sheng)产(chan)的(de)(de)(de)(de)(de)必(bi)需设备,不会(hui)太受经济(ji)(ji)环境以(yi)(yi)及客户短期支(zhi)付(fu)能(neng)力的(de)(de)(de)(de)(de)影响。国(guo)内(nei)领先(xian)企(qi)(qi)业(ye)(ye)的(de)(de)(de)(de)(de)变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)产(chan)品具有(you)优越(yue)的(de)(de)(de)(de)(de)性价比(bi),完全(quan)可以(yi)(yi)代(dai)(dai)替(ti)国(guo)外一(yi)(yi)些高端(duan)产(chan)品。随(sui)着煤(mei)炭企(qi)(qi)业(ye)(ye)的(de)(de)(de)(de)(de)成本压力加大,采购国(guo)内(nei)产(chan)品的(de)(de)(de)(de)(de)可能(neng)性反而会(hui)更高。  数(shu)据(ju)统计(ji),国(guo)内(nei)变(bian)(bian)(bian)频(pin)(pin)(pin)(pin)器(qi)(qi)(qi)市(shi)场(chang)增长率一(yi)(yi)直保持在12%-15%,市(shi)场(chang)潜(qian)在空间大约...
2018 - 01 - 17
从过去十几年电(dian)(dian)(dian)(dian)梯(ti)(ti)发展历程来看,我国电(dian)(dian)(dian)(dian)梯(ti)(ti)产(chan)量一直(zhi)保持稳(wen)步增长,预计2018年增长速度在(zai)(zai)(zai)15%-20%之间。随着技术的(de)不(bu)断发展和(he)我国节能减排(pai)政(zheng)策的(de)不(bu)断落实,电(dian)(dian)(dian)(dian)梯(ti)(ti)节能与安全已经成为电(dian)(dian)(dian)(dian)梯(ti)(ti)发展的(de)方向(xiang),为配(pei)(pei)(pei)合《特种设(she)备(bei)(bei)安全与节能事业发展“十三五”规划》的(de)实施(shi),各地方政(zheng)府纷纷出台电(dian)(dian)(dian)(dian)梯(ti)(ti)更(geng)换或(huo)改(gai)造(zao)(zao)计划,将(jiang)到期需更(geng)换的(de)电(dian)(dian)(dian)(dian)梯(ti)(ti)通过更(geng)换或(huo)技术改(gai)造(zao)(zao)替换成节能电(dian)(dian)(dian)(dian)梯(ti)(ti)。  电(dian)(dian)(dian)(dian)梯(ti)(ti)在(zai)(zai)(zai)运行(xing)过程中安全是最重要的(de),备(bei)(bei)用(yong)(yong)电(dian)(dian)(dian)(dian)系(xi)统(tong)的(de)使用(yong)(yong)尤为关键(jian),它可以(yi)确保电(dian)(dian)(dian)(dian)梯(ti)(ti)在(zai)(zai)(zai)停电(dian)(dian)(dian)(dian)以(yi)及突发状况(kuang)时候可以(yi)正常运行(xing),根据(ju)《居住(zhu)区供(gong)配(pei)(pei)(pei)电(dian)(dian)(dian)(dian)设(she)施(shi)建(jian)设(she)标准》规定,多层(ceng)(ceng)高层(ceng)(ceng)的(de)住(zhu)宅用(yong)(yong)电(dian)(dian)(dian)(dian)属于一级负荷(he)区域,用(yong)(yong)电(dian)(dian)(dian)(dian)单位应自备(bei)(bei)应急电(dian)(dian)(dian)(dian)源。但高层(ceng)(ceng)建(jian)筑刚开始兴建(jian)时,对这块要求不(bu)够严格,很多高层(ceng)(ceng)住(zhu)宅小区很少有(you)备(bei)(bei)用(yong)(yong)电(dian)(dian)(dian)(dian)源或(huo)设(she)计双(shuang)回路供(gong)电(dian)(dian)(dian)(dian),也少有(you)配(pei)(pei)(pei)备(bei)(bei)自用(yong)(yong)发电(dian)(dian)(dian)(dian)机(ji)的(de),双(shuang)线供(gong)电(dian)(dian)(dian)(dian)设(she)施(shi)不(bu)多。“没有(you)备(bei)(bei)用(yong)(yong)电(dian)(dian)(dian)(dian)源,电(dian)(dian)(dian)(dian)梯(ti)(ti)运行(xing)会面临(lin)较大的(de)安全隐患。”业内人(ren)士表(biao)示,在(zai)(zai)(zai)停电(dian)(dian)(dian)(dian)情况(kuang)下启动备(bei)(bei)用(yong)(yong)电(dian)(dian)(dian)(dian)源,能够使电(dian)(dian)(dian)(dian)梯(ti)(ti)恢复(fu)正常运行(xing)状态,而(er)...
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