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变频器批发

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变频器基础知识问答90例,新手入门神器(上)

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变频器基础知识问答90例,新手入门神器(上)

发布日期:2019-03-26 作者: 点击:

变频调速技术是怎样发展起来的?

变频可以调速这个概念,可以说是交流电动机“与生俱来”的。同步电动机不消说,即使是异步电动机,其转速也是取决于同步转速(即旋转磁场的转速)的变频器厂

n=n1(1-S)………………(1-1)

SHIZHONG:n——DIANDONGJIDEZHUANSU,m/min

n1——DIANDONGJIDETONGBUZHUANSU,r/min

S——DIANDONGJIDEZHUANCHALV

ERTONGBUZHUANSUZEZHUYAOQUJUEYUPINLV

广东11选5n1=60f/p………………(1-2)

广东11选5SHIZHONG:f——PINLV,Hz

p——CIJIDUISHU

SUOYISHUO,JIAOLIUDIANDONGJICONGDANSHENGZHIRIQI,JIUYIJINGZHIDAOGAIBIANPINLVKEYIDIAOJIEZHUANSULE。DANDANGSHI,HAIBUJUBEIGAIBIANPINLVDESHOUDUAN。

广东11选5ZHALIUGUANDEWENSHI,SHIBIANPINDIAOSUDEMENGXIANGCHUXIANLENENGGOUSHIXIANDEXIWANG。DANNEISHEBEIDEPANGDAYUANGGUI,SHITAWUFAJINRUSHIYONGDEJIEDUAN。

ZHIDAO20SHIJIDE60NIANDAI,SUIZHEJINGZHAGUANDECHUXIANJIQIYINGYONGJISHUDEXUNSUFAZHAN,BIANPINDIAOSUKAISHIJINRUSHIYONGDEJIEDUAN。DANYOUYUXUDUOJISHUWENTIJIEJUEDEHAIBUGOUWANSHAN,DIAOSUXITONGDEXINGNENGZHIBIAONANYIHEZHILIUDIANJIXIANGPIDI,YINERWEINENGDADAOTUIGUANGYINGYONGDEJIEDUAN。BIANPINQICHANG

70NIANDAIMOQIYILAI,YIFANGMIAN,SHILIANGKONGZHILILUNDETICHUHESHISHI,SHIBIANPINDIAOSUXITONGDEXINGNENGZHIBIAODADAOLEYUZHILIUDIANJIDIAOSUXITONGSHIFENJIEJINDEDIBU;LINGYIFANGMIAN,DIANLIDIANZIQIJIANDEFEISUFAZHAN,YESHISPWMDIAOZHIJISHURIZHENWANSHAN,BIANPINDIAOSUQIDETIJIYUEZUOYUEXIAO,JIAGEYEDADAOLEYONGHUNENGGOUJIESHOUDECHENGDU。BIANPINDIAOSUZHEICAIJINRULEPUJIYINGYONGDEJIEDUAN。BIANPINQICHANG


变频调速为什么常缩写成VVVF?


VVVFDEQUANCHENGSHIVariable Voltage Variable Frequency,YISISHI“BIANYABIANPIN”。

YUANLAI,ZAIJIAOLIUYIBUDIANDONGJINEI,WAIJIADEDIANYUANDIANYAZHUYAOHERAOZUDEFANDIANSHIXIANGPINGHENG,ERRAOZUDEFANDIANSHIZEYUDIANLIUDEPINLVHEMEIJIXIADECITONGLIANGYOUGUAN:

广东11选5U≈E=4.44 W1ff=Keff

广东11选5KEJIAN,CITONGLIANGDEDAXIAOYUDIANYAHEPINLVDEBIZHIYOUGUAN:

f≈U/Kef=Ke'·U/f

SHIZHONG:U——DIANYUANXIANGDIANYA

E1——MEIXIANGDINGZIRAOZUDEFANDIANSHI

广东11选5W1——MEIXIANGDINGZIRAOZUDEZASHU

广东11选5f——MEIGECIJIXIADECITONGLIANG

Ke、Ke'——CHANGSHU

SHI(1-4)BIAOMING:DANGPINLVXIAJIANGSHI,RUGUODIANYABUBIAN,ZECITONGLIANGJIANGZENGJIA,YINQIDIANJITIEXINDEBAOHE。ZHEIDANGRANSHIBUYUNXUDE。YINCI,WEILEBAOCHIDIANJINEIDECITONGLIANGJIBENBUBIAN,ZAIGAIBIANPINLVDETONGSHI,YEBIXUGAIBIANDIANYA。


交—直—交是什么意思?

BIANPINZHUANGZHIYOULIANGDALEI:YILEISHIYOUGONGYEPINLVZHIJIEZHUANJIECHENGKEBIANPINLVDE,CHENGWEI“JIAO—JIAOBIANPIN”。LINGYILEIJIUSHI“JIAO—ZHI—JIAOBIANPIN”,YISISHI:XIANBAGONGYEPINLVDEJIAOLIUZHENGLIUCHENGZHILIU,ZAIBAZHILIU“NIBIAN”CHENGPINLVKEBIANDEJIAOLIU。BIANPINQICHANG

JIAO—ZHI—JIAODEDIANLUJIEGOU


SPWM代表什么?

SPWMDEQUANCHENGSHISine Pulse Width Modulation,YISISHIZHENGXIANMAICHONGKUANDUDIAOZHI。ZHEISHISHIXIANGAIBIANPINLVDETONGSHIYEGAIBIANDIANYADEYIZHONGDIAOZHIFANGSHI。

BIANYABIANPINDEJIBENFANGSHIYOULIANGZHONG:

广东11选5(1) ZAIGAIBIANPINLVDETONGSHIYEGAIBIANFUZHI,CHENGWEIMAIFUDIAOZHI,JIANXIEWEIPAM,RUTU1-3aSUOSHI。

(2) ZAIGAIBIANPINLVSHI,MAICHONGDEFUZHIBUBIAN,ERTONGGUOGAIBIANMAICHONGDEZHANKONGBILAIGAIBIANQIPINGJUNDIANYA,CHENGWEIMAIKUANDIAOZHI,JIANXIEWEIPWM。

SPWM的特点是:脉冲序列中的脉冲宽度和脉冲间的间隔宽度是按正弦规律安排的。


常用的开关器件有哪些?

广东11选5MUQIAN,ZAIZHONG、XIAOXINGBIANPINDIAOSUQIZHONGYONGDEZUIDUODESHIGONGLVJINGTIGUAN,WEILETIGAOFANGDABEISHU,CHANGZUOCHENGDALINDUNGUAN,YIBANDIANLUTUZHONGRENGHUACHENGDANGUAN,DAIBIAOFUHAOSHICTRHUOBTR。

广东11选5RONGLIANGJIAODADEBIANPINDIAOSUQIZHONGZECHANGYONGKEGUANDUANJINGZHAGUAN,QIDAIBIAOFUHAOSHIGTO。

YIJINGJINRUSHIYONGJIEDUANDEZUIXINQIJIANYOU:JUEYUANZHASHUANGJIJINGTIGUAN,DAIHAOIGBT,SUOSHI。ZHENGZAIKAIFABINGYIJINGQUDECHENGGUODEXINPINZHONGHAIYOUBUSHAO。


变频调速器的主电路是怎样构成的?

JIAO—ZHI—JIAODIANYAXINGBIANPINDIAOSUQIZHUDIANLUDEJIBENJIEGOURUTU。TUZHONG,DRSHISANXIANGZHENGLIU。RASHIXIANLIUDIANZU,XIANZHIBIANPINQIGANGHESHANGDIANYUANSHI,DUILVBODIANRONGCDECHONGDIANDIANLIU。DANGCCHONGDIANDAOYIDINGCHENGXUHOU,JINGZHAGUANVTDAOTONG,RAJIANGBUZAIQIXIANLIUZUOYONG。GONGLVJINGTIGUANV1~V6ZUCHENGSANXIANGNIBIANQIAO,JIANGZHILIUDIANNIBIANCHENGSANXIANGJIAOLIUDIANHOUGONGDIANJIDIANDONGJIM。ERJIGUANV01~V06DEZUOYONGSHI:ZAINIBIANGUOCHENGZHONG,DANGJINGTIGUANDEeJIDIANWEIGAOYUcJIDIANWEISHITIGONGXULIUHUILU;ZAIDIANDONGJIJIANGSUGUOCHENGZHONGTIGONGNENGLIANGFANKUI(ZAISHENG)HUILU。RBSHIDIANDONGJIZAIZAISHENGZHIDONGGUOCHENGZHONGDEHAONENGDIANZU,VBZAIDIANDONGJIJIANGSUGUOCHENGZHONGDAOTONG,TIGONGHAONENGHUILU。RURBZUZHITAIDA,KEZAIJIEXIANDUANPHEDBZHIJIANJIERUWAIJIEZHIDONGDIANZU。BIANPINQICHANG



说明书中的“配用电动机容量”能不能作为选择变频器容量的依据?

RUDIANDONGJIQUDONGDESHILIANXUHENGDINGFUZAI(RUFENGJI),ZEKEYI。DANDUIYULIANXUBIANDONGFUZAI、JIXUFUZAIHEDUANSHIFUZAILAISHUO,ZEZHINENGZUOCANKAO,ERBUNENGZUOYIJU。ZHEISHIYINWEI,ZAIZHEIXIEFUZAIZHONG,JUEDINGDIANDONGJIRONGLIANGDEZHUYAOYINSUSHIFAREWENTI。ZHIYAOWENSHENGBUCHAOGUOYUNXUFANWEI,DUANSHIJIANDEGUOZAI(ZAIGUOZAINENGLIFANWEINEI)DUIDIANDONGJILAISHUOSHIZHENGCHANG。LIRU,YITAI3.7kWDEDIANDONGJI,ZAISHIJIGONGZUOZHONG,QISHUCHUGONGLVYOUSHIKEDA4.0kWHUO4.5kW。ERBIANPINDIAOSUQIDEGUOZAINENGLIZESHIFENYOUXIAN。ZAIDADUOSHUQINGKUANGXIA,BIANPINQIDERONGLIANGYINGFANGDAYIDANG。


变频器的频率调节范围如何?

TONGYONGXINGBIANPINDIAOSUQIDEZUIGAOSHUCHUPINLVYIBANBUGAOYU400Hz;ZUIDISHUCHUPINLVBUDIYU0.1Hz。GEZHONGBIANPINQIDEDIAOPINFANWEIGEBUXIANGTONG。

WOGUOGONGYEYONGDEPUTONGDIANDONGJI,ZUIGAOGONGZUOPINLVBUYICHAOGUO100Hz


什么是频率精度?

TONGCHANG,DANGPINLVWEISHUZILIANGSHEDINGSHI,JINGDUGAOXIE(WUCHAXIAOXIE),ERZAIPINLVJINGDUSHIZHIBIANPINQIDESHIJISHUCHUPINLVYUSHEDINGPINLVZHIJIANDEWUCHADAXIAO,YEJIAOPINLVZHUNQUEDUHUOPINLVWENDINGDU。

模拟设定时,精度高些(误差小些),而在模拟量设定时,精度低些(误差大些)。


“频率分辨率”的含义是什么?

“PINLVFENBIANLV”DEHANYISHISHENME?

PINLVFENBIANLVZHIDESHI:BIANPINQISHUCHUDEXIANGLINLIANG“DANG”PINLVZHIJIANDEZUIXIAOCHAZHI。

LIRU,RIBENFUSHIFVR-G7SXINGBIANPINQIDESHUZILIANGSHEDINGSHIDEPINLVFENBIANLVWEI0.002Hz。ZE,DUIYU40HzLAISHUO,BITAGAOYI“DANG”DEZUIXIAOPINLVWEI40.002Hz;ERBITADIYI“DANG”DEZUIDAPINLVWEI39.998Hz。


怎样调节和设定变频器的输出频率?

ZHUYAOYOUYIXIASANZHONGFANGSHI:

(1) XUANNIUSHEDING TONGGUOXUANDONGMIANBANSHANGDEXUANNIU(DIAOJIEMIANBANNEICEDEDIANWEIQI)LAIJINXINGDIAOJIEHESHEDING。SHUYUMONILIANGSHEDINGFANGSHI。BIANPINQICHANG

广东11选5(2) ANJIANSHEDING LIYONGJIANPANSHANGDEAJIAN(HUO△JIAN)HEVJIAN(HUO▽JIAN)JINXINGDIAOJIEHESHEDING。SHUYUSHUZISHEDINGFANGSHI。

广东11选5(3) CHENGXUSHEDING ZAIBIANZHIQUDONGXITONGDEGONGZUOCHENGXUZHONGJINXINGSHEDING。YESHUSHUZILIANGSHEDINGFANGSHI。




什么是外接设定?

ZAISHIJIGONGZUOZHONG,BIANPINQICHANGBEIANZHIZAIKONGZHIJUNEIHUOGUAZAIQIANGBISHANG,ERGONGZUORENYUANZETONGCHANGZAIJIXIEPANGBIANJINXINGCAOZUO。ZHEISHI,JIUXUYAOZAIJIXIEPANGBIANLINGSHEYIGESHEDINGPINLVDEZHUANGZHI,CHENGWEIWAIJIESHEDINGZHUANGZHI。

SUOYOUDEBIANPINQIDOUWEIYONGHUTIGONGZHUANYONGYUWAIJIESHEDINGDEJIEXIANDUAN。BIANPINQICHANG




变频器对外接设定信号有些有什么规定?

WAIJIESHEDINGXINHAOTONGCHANGYOUSANZHONG。

广东11选5(1) WAIJIEDIANWEIQISHEDING DIANWEIQIDEZUZHIHEWASHUGEBIANPINQIDESHUOMINGSHUZHONGJUNYOUMINGQUEGUIDING。

广东11选5(2) WAIJIEDIANYAXINHAOSHEDING GEZHONGBIANPINQIDUIWAIJIEDIANYAXINHAODEFANWEIYEGEBUXIANGTONG,TONGCHANGYOU:0~+10、0~+5、0~±10、0~±5VDENG。

广东11选5(3) WAIJIEDIANLIUXINHAO SUOYOUBIANPINQIDUIWAIJIEDIANLIUXINHAODEGUIDINGSHITONGYIDE,DOUSHI4~20mA。

广东11选5WEILEJIAQIANGKANGGANRAONENGLI,SUOYOUDEWAIJIESHEDINGXINHAOXIANDOUYINGCAIYONGPINGBIXIAN


怎样设定最大频率、基本频率?

广东11选5ZUIDAPINLVJIZUIDAYUNXUDEJIXIANPINLV。TAGENJUQUDONGXITONGDEYUNXUZUIGAOZHUANSULAISHEDING。

使电动机运行在基本工作状态下的频率叫基本频率,一般按电动机的额定频率设定。例如,对于国产的通用型电动机,基本频率设定为50Hz。


如何使工作机械不发生共振?

广东11选5RENHEGONGZUOJIXIEDOUYOUZIJIDEGUYOUZHENDANGPINLV,BIANPINDIAOSUXITONGZAIWUXIANBIANSUDEGUOCHENGZHONG,YOUKENENGCHUXIANZAIMOUYIZHUANSU(PINLV)XIA、ZHENGGEQUDONGXITONGFASHENGGONGZHEN,GONGZUOJIXIEJILIEZHENDONGDEXIANXIANG。WEIBIMIANSHANGSHUXIANXIANGDEFASHENG,BIANPINQITIGONGLESHEDING“HUIBIPINLV”DEGONGNENG,SHIQUDONGXIBIKAIGONGZHENDIAN。HUIBIPINLVZUIDUOKESHEDINGSANGE

广东11选5MEIGEHUIBIPINLVDOUBIXUSHEDINGLIANGGESHUJU,HUIBIDEZHONGXINPINLVf1HEHUIBIKUANDU△fJ,DIAOSHISHI,fJHE△fJDEQUEDING,DOUSHITONGGUOSHIJISHIYANDEDAODE。

变频器厂


电动机是否都是从0Hz开始起动?

广东11选5DUIYUQINGZAIQIDONGDEFUZAI,DIANDONGJIYIBANSHICONG0HzKAISHIQIDONGDE。DANDUIYUGUANXINGJIAODADEFUZAI,QIDONGSHIXUJIAYIDIANCHONGJILI,CAIYIYUQIZHUAN。ZHEISHI,KESHIDANGSHEDINGQIDONGPINLV。SHIQIDONGZHUANJUZENGJIA,TONGSHIYESUODUANQIDONGSHIJIAN。


降速过快会发生什么现象?

JIANGSUSHI,PINLVSHOUXIANXIAJIANG,XUANZHUANCICHANGDEZHUANSUJIANGDIYUZHUANZIDEZHUANSU,SHIDIANJICHUYUFADIANJI(ZAISHENG)ZHUANGTAI。DIANDONGJIDEDONGNENGZHUANBIANCHENGLEDIANNENG,TONGGUONIBIANQIAODEXULIUERJIGUANFANKUIDAOZHILIUBUFEN,YOUZHIDONGDIANZURBJIANGQIXIAOHAODIAO。

JIANGSUGUOKUAI,ZHIDONGDIANZURBJIANGLAIBUJIXIAOHAODIAODIANDONGJIDEDIANNENG,CONGERSHILVBODIANRONGQISHANGDEZHILIUDIANYAGUOGAO,DAOZHIGUODIANYA。


调试时,怎样确定降速时间?

SHOUXIANJIANGJIANGSUSHIJIANSHEDINGDEZHANGYIXIE,ZAIDIANDONGJIJIANGSUGUOCHENGZHONGGUANCHAZHILIUDIANYA。ZAIZHILIUDIANYADEYUNXUFANWEINEI,JINLIANGSUODUANJIANGSUSHIJIAN。


在什么情况下需要外接制动组件?

广东11选5DANGGONGZUOJIXIEYAOQIUKUAISUZHIDONG,ERZAISUOYAOQIUDESHIJIANNEI,BIANPINQINEIJIEDEZHIDONGDIANZULAIBUJIXIAOHAODIAOZAISHENGDIANNENGERSHIZHILIUBUFENSHI,XUYAOJIAJIEZHIDONGZUJIAN,YIJIAKUAIXIAOHAOZAISHENGCHANDIANNENGDESUDU。


外接制动组件包括哪些部件?

BAOKUOLIANGGEBUFEN:(1) ZHIDONGDIANZU,RUTUZHONGRB。

广东11选5(2) FANGDIANDANYUAN JITIGONGFANGDIANHUILUDEJINGTIGUAN,RUTUZHONGZHIVB。BIANPINQICHANG

YOUCHANGJIATIGONGDEZHIDONGDIANZUHEFANGDIANDANYUANNEI,TONGCHANGHAIFUYOUREJIDIANQI,QICHUDIANDEJIEFARUTU。

YOUYUVBYUVBDEDAOTONGSHIJIANBUKENENGYIZHI,ERRBYURBBINGLIANHOUDEZUZHIJIAOXIAO,XIANDAOTONGDEJINGTIGUANHENRONGYISUNHUAI。YINCI,ZAIJIERUWAIJIEZUJIANSHI,YINGJIANGPBHEDBJIANDELIANXIANQUDIAO,SHIRBBUJIERUDIANLU。

变频器厂


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