火狐体育app

KAIGUANDIANYUANCONGSHANGSHIJI50NIANDAIWENSHIZHIJINYITIJIXIAO、XIAOLVGAOERGUANGFANYINGYONGYUJISUANJI、TONGXINZHUANGBEIDENGJIHUSUOYOUDEDIANZISHEBEI。QIZHONGLEIFANDUO、XINGSHIDUOYANG，FAZHANQUSHIYECHAOZHEXIAOTIJI、GAOXIAOLV、DICHENGBENDEFANGXIANGFAZHAN。ZHEILIJIESHAODE3 00 WKAIGUANDIANYUANSHUYUGELIXINGYINGKAIGUAN、BANQIAOSHIKAIGUANDIANYUAN，ZAIJIAODIDIANYA(1 4V)HEJIAODADIANLIU(2 2A)SHUCHUDETIAOJIANXIAYOUHENHAODEXIAOLVJISHUCHUZHIBIAO，DUIHEXINQIJIAN(LIRUGAOPINBIANYAQI)JINXINGLEHELIDECANSHUJIRAOZHIGONGYISHEJI。

GAOPINBIANYAQISHIKAIGUANDIANYUANZHONGHEXINNENGLIANGZHUANHUANBUJIAN，TAHEPUTONGGONGPINBIANYAQIYIYANGYESHITONGGUOCIOUHELAICHUANSHUNENGLIANGDE。BUGUOZAIZHEIZHONGGONGLVBIANYAQIZHONGSHIXIANCIOUHEDECILUBUSHIPUTONGBIANYAQIZHONGDEGUIGANGPIAN，ERSHIZAIGAOPINQINGKUANGXIAGONGZUODECIDAOLVJIAOGAODETIEYANGTICIXINHUOPIMOHEJINDENGCIXINGCAILIAO，QIMUDESHIWEILEHUODEJIAODADELICIDIANGAN、JIANXIAOCILUZHONGDEGONGLVSUNHAO，SHIZHINENGYIZUIXIAODESUNHAOHEXIANGWEISHIZHENCHUANSHUJUYOUKUANPINDAIDEMAICHONGNENGLIANG[1]。

TIEYANGTICIXINYOUEC、EE、EDT、EP、 EPC、 EF、 EI、 PQ、 RM、 P、LPDENGDUOZHONGXINGHAO，YINGYONGYUGEZHONGBUTONGDEYAOQIU，QIZHONGPQXINGCIXINJUYOUCIPINGBIHAODEYOUDIAN，JIANXIAOLEDIANCIGANRAO(EMI)DECHUANBO，TEBIESHIYONGYUKAIGUANDIANYUANBIANYAQI，ZAI50W～1 000WFANWEINEIDEXIAOGUOJIAOHAO。

2．用PQ35/35制作300W半桥式变换器高频开关电源

2.1 300W(14V、22A)BANQIAOSHIKAIGUANDIANYUANYUANLITU

3 00 W(1 4 V、 2 2 A)BANQIAOSHIKAIGUANDIANYUANYUANLITURUTU1SUOSHI。YOUYUANLITUKEKANCHU，3 00 WBANQIAOSHIKAIGUANDIANYUANZHUYAOYOULIANGZHIGONGLVGUANIRFP460LC、GAOPINBIANYAQIPQ35／35(PC40CAIZHI)、SHUCHUZHENGLIULVBODIANLU、QUDONGDIANLU、BAOHUDIANLU、KONGZHIDIANLU(PIANFUSUOXIANBENTUWEIJICHU)YIJIFUZHUDIANYUANDENGZUCHENG。

关于半桥式开关电源原理许多书籍已详细说明，本文不再嗷述，下面详细说明高频变压器的参数设计和绕制工艺。
 

2．2 300WBANQIAOSHIKAIGUANDIANYUANGAOPINBIANYAQIDECANSHUSHEJIYURAOZHI

BANQIAOSHIGAOPINBIANYAQIDECIHUATEXINGGONGZUOZAIDIYI、SANXIANGXIAN，CITONGBIANHUACONGYIBmDAO+Bm，SHUYUDUICHENGSHIGONGZUOBIANYAQI，WUXUJIAQIXI。

(1)GUSUANPQ35CIXINDEGONGLVRONGLIANG

开关电源变压器功率容量计算式为[2]：

 

SHIZHONG

PT－－BIANYAQIDESHIZAIGONGLV，DUIYUBANQIAOSHIPT=(1／ η+1．4 1 4)P。，QIZHONGQUXIAOLVη=8 5％，Po=300W， ZEPT=777w；

Ko－－CHUANGKOUDETONGTIANCHONGXISHU，QU0．5：

Kf－－BOXINGXISHU，FANGBOSHIQU4；

Fw－－KAIGUANPINLV，BENLIWEI1 00KHz：

Bw－－CIXINGONGZUOCITONGMIDU，YIBANQU1／3BAOHECITONGMIDU，BENLICAIYONGP C 4 0CAIZHI，BAOHECIMIG s=0．39T(1 00℃)， QUBw=0．1 3T：

Kj－－DIANLIUMIDUBILIXISHU，YIBANQU400：

X－－CHANGSHU，YOUSUOXUANCIXINQUEDING，KEQUYI0．1 2。

ZEA P＝(7 7 7*1 04／0．5*4*1 00*1 03*0．1 3*4 00)1.14≈0．72cm4。

YEKEYIYOUXIASHIJISUAN[3]：

SHIZHONG

Pt－－BIANYAQIDEBIAOCHENGSHUCHUGONGLV,KEQU1.5PoWEI450W;

η－－BIANYAQIDEXIAOLV,ZHEILIQU85％：

f－－KAIGUANPINLV，BENLIWEI1 00KH z：

Bm－－CIXINDEZUIDACIGANYINGQIANGDU，QU1 500GS：

δ－－QIBAOXIANDEDIANLIUMIDU，1 00KHzPINLVKEQU6A／mm2：

Km－－CHUANGKOUDETONGTIANCHONGXISHU，QU0．5：

Kc－－CIXINTIANCHONGXISHU，KEQU1．0。

ZEA P=4 5 0*1 06／(2*0．8 5*1 00*1 03*1 5 00*4*0．5*1)≈0．59cm4。

ERCHABIAOP Q 3 5／3 5DEA P=4．3 c m4，YUANYUANMANZUGONGLVRONGLIANGYAOQIU，ZHISUOYIXUANPQ35YESHIWEIYIHOUJIADASHUCHUGONGLVZUOZHUNBEI。

(2)JISUANYUANBIANRAOZUZASHU

原边绕组匝数可由下面公式计算：

 

SHIZHONG

Kf－－BOXINGXISHU，FANGBOSHIQU

Pt－－BIANYAQIDEBIAOCHENGSHUCHUGONG 4；LV，KEQU1．5PoWEI4sow；

Fw--KAIGUANPINLV，BENLIWEIη1--BIANYAQIDEXIAOLV，ZHEILI 1ooKH z：

Bw－－CIXINGONGZUOCITONGMIDU，QU0．1 3T；

Ae－－ CIXINYOUXIAOMIANJI，PQ35／35WEI196mm2；

V－－BIANYAQIYUANBIANDIANYA，BENLIZHONGV=250*1．3／2=1 62．5V。

ZENp=1 6 2．5／4*1 00*1 08*0．1 3*1 9 6*1 0-6≈ 1 5．9，QUZHENG1 6ZA。HOULAIJINGGUOSHIYAN，QU20ZABIJIAOHESHI。

(3)JISUANYUAN、FUBIANRAOZUZASHUBIJIFUBIANRAOZU

可按下式计算半桥式高频变压器的原、副边匝数比：

 

SHIZHONG

Np--YUANBIANRAOZUZASHU

Ns--FUBIANRAOZUZASHU

Vi n mi n--ZUIXIAOSHURUZHILIUDIANYA，ZAIJIAOLIU1 9 0 VJIAZAIXIAYUEWEI1 90*1．3=247V。

V o p－－BIANYAQIYINGSHUCHUDIANYA，WEIDIANYUANSHUCHUDIANYAVo、ZHENGLIUERJIGUANZHENGXIANGYAJIANGVdfHELVBODIANGANZHILIUYAJIANGV LSANXIANGZHIHECHUYIZHANKONGBID，JIVop=(Vo+VdfSHIVL)／D。ZAIBENLIZHONGVo=14V、V df=0．7V、VL。=0．2V、D=0．8，ZE Vop=(1 4+0．7+0．2)／0．8=18．625V

ZENp／Ns=1／2*247／18．625≈6．6。

FUBIANRAOZUNs=NP／6．6=20／6．6≈ 3ZA，ZAISHIYANZHONG2 0：3DEZABIQUDELEHENHAODEXIAOGUO。

(4)XIANJINGHEGENSHUDEXUANQU

YUANBIANRAOZUDIANLIUWEII p=2 P o／Vsη；

Po=Vop*22=14．9*22=327W；

Vsη=Vin min*η=247*98％=242．0 6，QIZHONGηWEIBIANYAQIDEXIAOLV；

ZE I p=2*3 2 7／2 4 2．0.6≈2．7A。

KAOLVQUFUXIAOYING，ZAIl00KHzl00℃XIACHUANTOUSHENDUWEI△=7．6 5／F1/2≈0．242mm[4]，2△=0．484mm， YINGXUANZEZHIJINGBUCHAOGUO0．484mmDEQIBAOXIAN。KAOLVYOUQIDEHOUDU，SHIJIZHONGXUANQULE0．49mmDEGAOQIANGDUQIBAOXIAN。

QUDIANLIUMIDUJ=6A／mm2，ZEDANGENo．49mmXIANJINGQIBAOXIANKETONGGUODIANLIUWEI：

I=JπD2／4=6*3．1 4*0．49*0．49／4≈1．1 3A

ZECHUJIKEYONG3GENBINGLIAN。CIJIWEII p*Np／N s／I≈1 6GEN。YINWEICIJIDEDIANLIUBIJIAODA(2 2A)，YEKEYONGTONGBORAOZHI。

(5)GAOPINBIANYAQIDERAOZHI

GAOPINBIANYAQIDERAOZHIZAIZHIZUOKAIGUANDIANYUANGUOCHENGZHONGSHIHENFUZADE，DANGGONGLVGUANYOUDAOTONGZHUANWEIGUANDUANSHI，YOULOUGANCUNCHUDENENGLIANGSHIFANGHUICHANSHENGHENDADEDIANYAJIANFENG，RONGYIZAOCHENGQIJIANDESUNHUAI、BINGQIEEHUAXIAOLV，SUOYIYAOJINLIANGSHIBIANYAQIDELOUGANJIANGDAOZUIXIAO。ZHEILICAIYONGDESHI“SANMINGZHI”RAOFA，JIXIANRAOCHUJIDEYIBAN，ZAIRAOCIJI，RANHOURAOCHUJIDELINGYIBAN。ZHEIYANGCHUJIJIANGCIJIBAOZAILIMIAN，KEYIZENGJIAOUHE，JIANXIAOLOUGAN。LINGWAICAIYONGDUOGUXIANJIAOHEDEFANGFA，ZAIBUTONGDEJIEMIAN，MEIYIGUXIANJIAOHUANWEIZHI，YOULIYUDIANLIUJUNHENG；HAIKEYIZENGJIAXIANCAIDEBIAOMIANJI，JIANXIAOGAOPINDIANZU，YOULIYUJIANGDIWENSHENG。

3 0 0 WZHUGONGLVGAOPINBIANYAQIYONG0．4 9mmXIANJINGGAOQIANGDUQIBAOXIAN，CHUJIYONG3GENJIAOXIANHOUXIANRAOZUILIMIANDE1 0QUAN，CHAN2QUANJIAODAI。JIEZHERAOZHONGJIANDECIJI，YONG1 6GENJIAOXIANHOURAO3QUAN，SHUAICHUZHONGXINCHOUTOU，ZAIANYUANFANGXIANGRAO3QUAN，ZHEIYANGKEZAITONGYIPINGMIANSHANGRAOWANCIJI，ZHISHIZHONGXINCHOUTOUDELAIHUILIANGGENXIANYOUXIESHAOGUCHULAIYIXIE，ZHIHOUZAICHAN2QUANJIAODAI。RANHOURAOCHUJIDEHOU1 0QUAN，CHAN3QUANJIAODAI。RAOZHIDESHIHOUYINGJINLIANGSHIXIANJUNYUNFENBU，ZHIZUOWANCHENGHOUCELIANGDIANGANLIANGWEICHUJI1．27mH；LIANGGECIJI5 5μH。SHIJIANZHENGMING，ZHEIYANGRAOZHIDEBIANYAQILOUGANHENXIAO，YUAN、FUBIANLOUGANZHIYOUJIGEμH。

(6)QUDONGBIANYAQIDERAOZHI

QUDONGBIANYAQICAIYONGGUANXINGCIXINP23／18，GUANXINGCIXINDETEDIANSHIZAISUOYOULEIXINGDECIXINZHONGJUYOUZUIHAODECIPINGBIXIAOGUO，DANSHIYEJUYOUZUICHADESANRENENGLI，YINCIBIJIAOSHIHEYONGLAIZHIZUOXIAOGONGLVDEQUDONGBIANYAQI。

QUDONGBIANYAQIYONG0．2mmXIANJING，DANGEN。XIANRAOGAOQIAOKAIGUANGUANDE20QUAN，ZHONGJIANRAOYUANBIANDECHUJI20QUAN，ZUIHOURAODIQIAOKAIGUANGUANDE20QUAN。ZHEISHILINGYIZHONGCAIYONGCIJIYICHUJIYICIJIDERAOFA，TONGYANGKEYIYOUXIAODIJIANXIAOLOUGAN。ZHIHAOHOUCELIANGDIANGANLIANGDAGAIYOU1．3mHZUOYOU。

(7)ELIUQUANDEJISUAN

扼流圈是开关电源二次输出级主要功率器件，也是影响输出电压指标的重要因素，过大的电感量会使输出的动态特性变差，而过小的电感量又会使输出的纹波指标率差，因此必须选取合适的电感量。粗略地可按下面公式计算：

 

SHIZHONG

P――SHUCHUGONGLV；

F――KAIGUANPINLV；

I――SHUCHUDIANLIU。

ZEDIANGANLIANGWEIL=2*P／f*I2=2*3 00／(1 00*1 03*2 22)，≈1 2 μ H。

3．纹波抑制和EHI

WENBOHEE M ISHIKAIGUANDIANYUANZHONGDEZHONGYAOZHIBIAO，KEYISHUOSHIZHIJIEPINGJIAZHIZUODIANYUANHAOHUAIDEBIAOZHI，YINCIWENBOYIZHIHEJIANXIAOEM ISHIMEIGEDIANYUANZHIZUOZHEDOUYAOJIAOJINNAOZHIQUJIEJUEDE。XIAMIANSHI300wDIANYUANDEYIXIEJIEJUEFANGFA。

(1)300wKAIGUANDIANYUANZAISHURUJIJIARULEEMIDIANYUANZAOSHENGLVBOQI。DIANYUANEMIZAOSHENGLVBOQISHIYIZHONGWUYUANDITONGLVBOQI，TAWUSHUAIJIANDIJIANGJIAOLIUDIANCHUANSHUDAODIANYUAN，ERDADASHUAIJIANSUIJIAOLIUDIANCHUANRUDEE M IZAOSHENG；TONGSHIYOUNENGYOUXIAODIYIZHIDIANYUANSHEBEICHANSHENGDEEM IZAOSHENG，ZUZHITAMENJINRUJIAOLIUDIANWANGGANRAOQITADIANZISHEBEI，JIANGDICHUANDAOSAORAO。

(2)ZAISHUCHUJIJIARULEYIJIYIZHIWENBOZAOSHENGDEGONGMOELIUQUAN。SHILIUCHUDEDIANLIUHELIUHUIDEDIANLIUZAIYIGEXIAOCIHUANSHANGCHANSHENGXIANGFANDEGANYINGCITONG，SHIQIXIANGHUDIXIAO，JIDADIXIAOCHULESHUCHUDEGAOPINZAOSHENG。JINGGUOSHIYAN，WEIJIAGONGMOELIUQUANDESHUCHUDIANYAYONGSHIBOQIHUIKANDAOYOU20 0mVp-pDEGAOPINZAOSHENG，JIARUHOUZHIYOUSHIJImVp-p。

(3)QITADEYIZHICUOSHI。BAOKUOZAISHURUJICHUANJIENT CFANGDIANWANGLANGYONGDIANZU、ZAIGONGLVKAIGUANGUANHESHUCHUZHENGLIUERJIGUANYIJIGAOPINBIANYAQICHUJIJIERURCXISHOUWANGLUO、SHIYONGCHAOKUAIHUIFUXIAOTEJIERJIGUANDENGDENG，DOUKEYIYOUXIAODIJIANXIAODIANYAJIANFENG、YIZHIGAOPINZAOSHENG。

4．结束语

3 00WKAIGUANDIANYUANSHIYIKUANSHIYONGDEBANQIAOSHIYINGKAIGUANDIANYUAN，QIXIAOLVDADAO85％，SHUCHUWENBOZAIJIAOLIU2 20VSHURUMANZAI(1 4 V、2 2 A)XIAZHIYOU80MVP－P，ERQIEDONGTAIXIANGYINGHAO，YIZAITONGXINZHONGJITAISHANGZUOGUO24XIAOSHILAOHUASHIYAN，XIAOGUOHENHAO。QIBUZUZHICHUZAIYU：YOUYUSHIYINGKAIGUANFANGSHI，XIAOLVMEIYOURUANKAIGUANHAO。RUANKAIGUANDEXIAOLVYIBANZAI90％YISHANG。

KAIGUANDIANYUANSHEJIZHONGDEYIGENANDIANZAIYUZHUYAOHEXINQIJIANDECANSHUXUANZESHANG，LILUNJISUANCHULAIDESHUJUZAISHIJIZHONGBINGBUYIDINGJIUNENGDAILAIHAODEXIAOGUO。LIRU，ZHUGAOPINBIANYAQIDEZASHUBIXUANZE，ZUOZHECENGJINGJIANGZASHUBIDIAODAO18：14，JIEGUOMEIDAOLIANGFENZHONGKAIGUANGUANJIUSHAOHUILE。SUOYI，YILILUNWEIYIJU，CONGFANFUDESHIYANZHONGHUODEHELIDAPEIJIANGHUITIGAOXIAOLVBINGJIANGDIEMIGANRAO。