主流小家电直流马达保护器件方案PPTC,可自行恢复,同时提高过流/过压浪涌防护
随着人们生活水平的不断提高,越来越多的小家电产品走进了大家的厨房。如豆浆机、食物料理机、榨汁机、搅拌机、绞肉机、打浆机、咖啡机等等,以上绝大部分小家电产品是使用直流马达的,因为直流马达有很高的性价比并能提供很大的启动扭矩。
大家都知道直流电机在堵转时没有反电动势,会产生数倍于正常工作电流的大电流,如此高的电流通过电刷流到线圈后将会产生很高的热量,当线圈温度上升到极限温度之上,就会导致线圈绝缘层的破坏,导致电机彻底烧毁。
目前直流马达的过流保护方案主要有一次性保险丝、双金属片、PPTC等三种防护手段。
一次性保险丝由于价格低廉、体积小、应用得比较广泛,但为了防止一次性保险误动作,所以选用保险丝的熔断电流通常会比电机正常工作电流大很多,这样在电机发生堵转时,容易出现动作慢的问题,导致保护不及时。另外由于更换保险丝也增加了售后的费用。
双金属片是利用温度变化时双金属片变形来实现保护的,对于温度改变,双金属片可以迅速动作,但是由于它只对温度敏感,所以安装的位置要非常合理的设置,否则无法起到保护作用。双金属片在保护后由于温度下降会重新启动,如用户忘记断电,又正好在清理刀片,则有可能对用户造成伤害。双金属片的触点对于强感性负载容易产生火花,所以多次开关后容易发生触点粘连或电阻变大等问题。
自恢复保险丝PPTC在正常情况下电阻很小,当有堵转发生时,电流迅速增大,由于PPTC的发热和电流平方成正比,所以PPTC温度也迅速上升,当上升到转折温度时,PPTC阻抗会骤然增大。到堵转的情况消失后,电流恢复正常,PPTC阻值亦恢复正常低阻抗,这样就降低了电机线圈的电流,起到了一个可恢复的过流保护。
PPTC器件对震动和感性负载不敏感,对瞬间大电流也不敏感。所以非常适用于小家电电机堵转保护应用上。PPTC的特点就是它对环境温度是敏感的。所以在高温和低温下,相同堵转电流的保护时间是不同的。高温下保护时间会比低温快很多。很多人也许认为满足了高温下的保护时间,低温下保护时间会太慢,觉得保护效果不好,但实际上电机线圈在低温下达到损坏的堵转时间也比高温下长很多,所有即使低温下PPTC器件需要更长时间才会动作,它依然可以保护电机不会损坏。优恩半导体公司的PPTC产品已有多年历史,目前有丰富的产品可用在电机保护上,包括了高压和低压的产品。
PPTC保护方案优点:
可自行恢复,节约更换保险带来的售后成本;
既能提高过流防护又能提供过压浪涌防护;
使用单项TVS管,配合PPTC又能起到电源防反接的防护,一举多得。
应用领域:
消费类电子设备;
小家电设备;
儿童玩具。
应用案例:
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本文由蛋挞转载自优恩半导体,原文标题为:主流小家电直流马达保护器件PPTC,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
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SERIES,SA90C,10D241K,SMD0805-010,10SMBJ180A,14D431K,LCDA05C-8,LCDA05C-4,25D,P6KE220CA,SA40CA,ESD05V32D-C,HCM1012GD900B05,10SMBT7.5A,ESD05V88D-CBP,10D821KEC,SMD0805-005,UN2E8-150ML,UN1812-760HS,ESD05V88D-CBD,SMCJ64A-AT,SMBJ48CA-AT,P3800TB,TPSMBJ30A,P3800TA,SMDJ90,UN3220-471HS,P6KE100CA,5KP28C,SMDT7.0A,P6SMB SERIES,5KP28A,14D681KJ,TPSMA100A,P3800SC,P3800SB,SMDJ85,6.0SMAJ54CA,ESD30V12D-C,P3800SA,ESD30V12D-A,SMDJ80,SMAJ8.5CA,SMAJ180C,SMAJ180A,UN2E5-90LSMD,TP5.0SMDJ40A,SMDJ75CA-AT,20D122KJ,10SMBT36A,ESD3.3V04D-LC,SMAJ350CA-AT,14D361KSC,5.0SMDJ220A,SMDJ78,UN30-160,UN16-900,ESD05V08P-LC,SMDJ75,25D121K,5KP8.0C,14D561KJ,SMDJ70,5KP8.0A,UN2K8-450L,1.5SMC10A,UN0805-420H,TPSMA6J26CA,SMDJ16CA,SMCJS SERIES,14D560K,SMBJ130C,SMBJ130A,5.0SMDJ350A,SMDJ64,SMDJ60,34S210J,5KP120CA,ESD12V52D-CF,30KP120A,UNS3220 SERIES,SMDJ43A-AT,SMDJ58,UN30-185,SMDJ54,P6KE75,10SMBJ7.0CA,SMDJ51,UN2E5-3600LL,20KP132A,SMAJ160CA-AT,10SMBT7.0A,UN2K8,P6KE62CA,UN30-135,SMDJ48,P6KE68,SMDJ45,SMDJ43,UNB-401M,SMDJ40,TPSMA36CA,P6KE82,ESD15V02D-CKN,5.0SMDJ78C,SMCJ7.0C,SMDT7.5A,5.0SMDJ78A,SMCJ7.0A,SMDJ51CA,5.0SMDJ48CA,UN111B339HWA1DFL,15KP51A,TPSMDJ,SMDJ36,SMDJ33,25D751KJ,P4SMA220A,SMDJ30,10SMBJ60A,P6KE91,KB-380,SM8Z26A,ESD3.3V12D-A,ESD3.3V12D-C,SMD1812-200-16V,TPSMCJ,UN2H8-5000LL,SMDJ28,5KP8.5C,SMDJ26,5KP8.5A,SMDJ24,UN2K8-600,SMDJ22,SMDJ20,UN1210-151H,SMD0805-110-12V,SMBJ11A-AT,07D331KJ,ESD0402M,UN16 SERIES,14D751KSC,SMD1812-300-16V,SM8Z28A,SMDJ19,ESD12V52D-HA,SMDJ18,SMDJ17,SMDJ16,TPSMB10J16CA,SMDJ15,TPSMBJ,SMDJ14,TPSMB56CA,SMDJ13,SMDJ12,SMDJ11,SMDJ10,SMCJ36A,SMD0805-010-30V,P6KE30,32D621KJ,SMCJ36C,SA190CA,5.0SMDJ75C,5.0SMDJ75A,UNA-SMD,15SMBJ160CA,SMF54CA,TPSMA6J18A,P4SMA91A,P6KE27,TPSMAJ,P6SMB170A,P0300DM,UN1812-390HS,P6KE24,P6KE22,P6KE43,SMCJ45CA,UN3E8-200HSMD,UN0603E,P6KE75CA,P0300EA,P0300EB,P0300EC,P6KE39,TPSMA6J19A,UN2H8,P6KE36,TCF03025U12002A SERIES,P6KE33,10SMBJ64A,SMCJ58CA,P6KE51,TPSMBJ110CA,SMDJ180CA-AT,25D511KJ,SMD1206-300,SMDJ7.5CA,TPSMA75A,UN1812-270HS,5.0SMDJ17A-AT,1.5KE18CA,14D201KJ,UN30-110,BLC03C-4,UN2K8-350L-2,5.0SMDJ70CA,UN2E5,UN2K8-350L-1,SMCJ33A,P6KE47,SMCJ33C,TPSMA6J16A,UN2E8,UN2E8-150HL,P4SMA350A,P6KE62,P4SMA6.8CA,ESD03V23T-LC,ESD03V23T-LA,ESD08V52D-A,15SMBJ180A,14D301K,10SMBT30A,P6KE56,ESD08V52D-C,TPSMA6J17A,5.0SMDJ33CA,UNS3K,UN2E6-SMD SERIES,UN1812-390H,TPSMDJ24CA,20D361K,40D361KJ,4.0SMF13CA,SMDJ160A,SMBJ160CA-AT,TP5.0SMDJ28A,
SMD0805L系列表面贴装自恢复PTC
描述- 该资料介绍了SMD0805L系列表面贴装可恢复PTC(自恢复保险丝)的特性、电气参数、测试程序和环境规格。这些产品适用于空间受限且需要重置保护的应用,具有快速断开、紧凑设计等特点。
型号- SMD0805XXXL/X,SMD0805-125L,SMD0805-400L,SMD0805-380L /12V,SMD0805L SERIES,SMD0805-200L,SMD0805-075L /2V,SMD0805-175L,SMD0805-260L,SMD0805-200L /12V,SMD0805-110L /12V,SMD0805-300L,SMD0805-400L /12V,SMD0805-150L /12V,SMD0805-125L /12V,SMD0805-175L /12V,SMD0805-260L /12V,SMD0805-300L /12V,SMD0805-350L /12V,SMD0805-075L,SMD0805-110L,SMD0805L,SMD0805-350L,SMD0805-150L,SMD0805-380L
【技术】解析贴片自恢复保险丝的主要缺陷
PPTC自恢复保险丝有插件式与贴片式,这两种保险丝或多或少都存在一些缺陷,本文优恩半导体就将为您介绍贴片自恢复保险丝的主要缺陷。实际上,贴片自恢复保险丝比较大的一个缺陷点是它不能够代替快速熔断器。
【技术】自恢复保险丝多久熔断?
自恢复保险丝(PPTC)常用于电路的限流保护中,其工作原理是在电路故障发生时立即熔断,以避免电路的进一步损坏。本文优恩半导体将介绍自恢复保险丝多久熔断?
竞沃(TLC)公司及产品介绍
描述- 竞沃电子科技有限公司——电子保护元器件专业制造商
型号- 04 100,NSML 1206,06 110,USML 1210,TVS SERIES,TRB SERIES,TRA SERIES,TRC SERIES,PC01,PSMD 0805,UU918,USMD1210,PB01,ASML 0402,AB19U,FSMD 0603,12 100,AB11,TRM SERIES,TLV SERIES,T31-19-8,MSML 1812,AB20U,PSML 0805,06 100,TLS SERIES,NPH106060E18,TD SERIES,CH270060E18,TRF SERIES,TRG SERIES,T90-52,MSMD 1812,AB09,LSMD 2920,NSMD1206,NSML***L1505,12 113,FSML 0603,12 110,T20-10-10
【技术】解析PPTC自恢复保险丝电流测试及注意事项
PPTC自恢复保险丝是一种常用的限流型电子元件,用于保护电路免受过载或短路等问题的损害。要正确地测量自恢复保险丝的电流,我们首先需要了解其结构组成和工作原理。
【技术】浅析PPTC自恢复保险丝在RS485通讯接口的应用
众所周知,PPTC自恢复保险丝是使用极为广泛的一种过流保护元器件,在一些笔记本电脑、汽车电子、以及变压器、工业控制设备,当然,也包括一些通讯接口,PPTC都能起到过电流和过温保护的作用。浅析PPTC自恢复保险丝在RS485通讯接口的应用。
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