늴żݽQ늴żҪǸɔ_Դ}_Դͨ·w,늴żݵĽQõķҪΡӵغ͞V
1.1.1 늴Ÿɔ_
늴}_O(sh)ݔͨϵy(tng)ܵ½ҪҪȻ˞}_Դͨ^(gu)ؾ迹/(ni)ϡԴ(do)늴}_ݗɔ_ϵܸɔ_·(jng)齛(jng)^(gu)Դ(jng)^(gu)̖(ho)|(chng)B(jng)^(gu)쾀ֱM(jn)|O(sh)(li)Ă(do)ɔ_ϵy(tng)(ni)(chng)O(sh)ݗɔ_O(sh)ݗɔ_ⲿϵ(ni)(chng)ⲿϵ(ni)(chng)l(f)C(j)쾀ϵy(tng)ⲿh(hun)(chng)ȵ
һ㶼dzҕ·ĹO(sh)Ӌ(j)һKܰ|(zh)ÉIJȫQO(sh)Ӌ(j)ˮƽPCBIJÉP(gun)I˹{(dio)ֲȡPCBؐһKܰÉKҪĭh(hun)m(yng)(Դض늴ŭh(hun))߀ҪĿɜy(c)ԡɾSo(h)a(chn)Եȹ̻O(sh)Ӌ(j)ˇg(sh)Cָ(bio)Ҫܶr1(g)̖(ho)(dng)KĿɔ_Ӱ푵C(j)ɔ_ָ(bio)PCBO(sh)Ӌ(j)һ
(x)̵ĹSr(sh)EMCA(y)zM(jn)пɔ_zܲIJIJPCBҪͨ^(gu)״{(dio)ܝM㿹ɔ_Q@늴ż݆(wn)}Ǐ·̖(ho)߾ȷˣ늴żݼg(sh)̶ܴһTˇԼg(sh)
y(c)ԇD(zhun)_(ti)y(c)ϵy(tng)O(sh)Ӌ(j)Է֣֞ٿƹӾ·O(sh)Ӌ(j)_(ti)wh(hun)_(ti)w(ni)߾Ƽy(c)|Б(yng)̖ͬ(ho)̖(ho)ǰ÷ŴO(sh)Ӌ(j)ȣ۽ӵϵy(tng)O(sh)Ӌ(j)ÿһ\(yn)^(gu)ж(hu)ɔ_ق(do)ϸɔ_ϸɔ_늸ϸɔ_Qɔ_(wn)}һ֣ϵy(tng)(ni)ɔ_ڸɔ_;o(w)Փԭv߀ǏČ(sh)`vɔ_ԴǽQɔ_Чķքeÿһֳl(f)(li)ӑՓ늴żO(sh)Ӌ(j)
2.1ƹӾ·늴żO(sh)Ӌ(j)
ÿ(g)ƹɿ䘋(gu)(ni)Ӿ·ģKO(sh)Ӌ(j)ÿ(g)늴żO(sh)Ӌ(j)¿ɷ֞Ă(g)棺Ӿ·ӡˢO(sh)Ӌ(j)O(sh)Ӌ(j)۹õװO(sh)Ӌ(j)ܿb乤ˇO(sh)Ӌ(j)
2.1.1Ӿ·ӡˢO(sh)Ӌ(j)
ӑՓΜpС·匦(du)ĸɔ_y(c)ϵy(tng)κӾ·(hu)(du)a(chn)(do)ϸɔ_ϸɔ_늸ϸɔ_ֻǴ־·ijЩĸɔ_ͻ@ĸɔ_Դ·Д(sh)·ģM·Ɣ(sh)·ɵԴ(dng)ϸɔ_ڰ(ni)ÿһ(g)оƬVccGND֮gҪ·ԱԓоƬɵԴ(dng)ͽpС䌦(du)оƬӰڽ·ݕr(sh)(yng)MܿоƬʹVcc-GNDͨ^(gu)·ݘ(gu)ɵĻ·eСVccGND߾(yng)M̶ܶ
˷ֹÿһKӡˢͨ^(gu)VccGND(du)ӡˢɂ(do)Vcc-GND̎Ҫһ(g)늽һ(g)0.1 Fĸlԓƽ(dng)
(sh)·и̖(ho)֮gԺЕr(sh)yԱ?yn)?sh)·кܴ@Nϲ(hu)ɇ(yn)صӰͬr(sh)(sh)·кд늉ʹ̖(ho)(du)Ժ늸ϿԺƔ(sh)·Ժϵķ
(du)ÿKӡˢӽӵõĽٚ늴Ч
y(c)ϵy(tng)ģM·ֱ̎С̖(ho)һ㲻(hu)(du)@Ժϸɔ_Ҳһ̖̎(ho)y(c)ϵy(tng)еļԴһ(g)2 kHzҽ׃̖(ho)ܮa(chn)׃ň(chng)(du)ɸɔ_O(sh)Ӌ(j)ӡˢr(sh)](mi)Чķ(li)(ni)ĸɔ_ֻͨ^(gu)Ӵɔ_·ͱɔ_·ľx(li)pСӰm(dng)ξķ(li)ԓư匦(du)ӡˢ@NŸɔ_Ҳֻͨ^(gu)(du)K(li)ơ
һ(li)vӾ·д·ʹ늉·늸Ժڜy(c)ԇD(zhun)_(ti)y(c)ϵy(tng)˜pС˔(sh)ֹڔ(sh)ֹŲ˺иl늉{(dio)̖(ho)Ĕ(sh)PWMʽ(q)(dng)ͬr(sh)늙C(j)@Mһ(g)늸ؓ(f)d(hu)(du)ɇ(yn)ϸɔ_^(gu)@M(hu)ɴ늸ϸɔ_a(chn)@Nɔ_ԭ(q)(dng)_P(gun)ͨ˲gؓ(f)d(hu)a(chn)ܸߵļ늉Ըɔ_ĴСͬ@һ늉Ɣ(sh)ֹŵ@Nɔ_(yng)֣
_P(gun)˼Ӻ·
ڸؓ(f)dABC֮g߉l
IGBT_P(gun)(q)(dng)·O(sh)p_P(gun)Č(do)ͨP(gun)ٶʹO(q)(dng)׃@ӌʹ_P(gun)ڌ(do)ͨP(gun)˲gкܴĉĸNɔ_挢ӑՓO(sh)Ӌ(j)·ӡˢr(sh)ɔ_
ڔ(sh)·У(do)Ҫͨ^(gu)Դ͵ؾՄVcc-GND֮gӞVяĺ̶ܴ@NϣҪӑՓԺ(du)ڸO(sh)Ӌ(j)Ҫӡˢ(gu)ɭh(hun)·(dng)ȻԴ͵ؾ@Ӽȿحh(hun)ʹ䲻ň(chng)ĸɔ_(du)ҪO(sh)pС̖(ho)֮gķֲˑ(yng)עc(din)
a. Mܱ̖(ho)L(zhng)xƽв
b. (qing)̖(ho)̖ͬ(ho)MܲҪN
c. r(sh)MҪĹ_gУ(du)ڸl̖(ho)
d. r(sh)߉·ݔݔɔ_ˑ(yng)^(gu)L(zhng)
ݔMҪ(q)(dng)Ҫr(sh)(yng)ȼӾ_xy(c)ϵy(tng)н(jng)20 MHzlÁ(li)10 kHz20 kHzȕr(sh)g(zhn)ڰgݔr(sh)(yng)ȼӾ_(q)(dng)ԸxݔĻ?ci)_e.(jng)ݔݔ?sh)?ho)ܕ(hu)l(f)׃ˑ(yng)һ(j)·ݔ̎ʩ
(sh)·(hu)S_eȱ_ƽɔ_Еr(sh)߉Mϱ߉·ܸɔ_y(c)ϵy(tng)еӋ(j)(sh)·p(wn)·ȣһ(g)ɔ_}_пB(ti)`D(zhun)Ҫ䲻õݔO(sh)Ӌ(j)ҪքeGNDͨ^(gu)1 kVccڕr(sh)߉·ݔ˿(ni)ݔeõݔҲҪҿ(yng)(du)ؽ1 000 Pflݡ
ͬ(sh)·ģM·Ŀɔ_(wn)}yQڔ(sh)·Ђ(do)һ㲻ɶ(wn)}(du)ģM·(li)v@Nɔ_s߶ҕ
ǰv(do)ϵҊ(jin)ʽ鹫ؾ(do)ϵЧķһc(din)ءЕr(sh)ܵӡˢgƲʹÿһ(g)Ԫ·ĵȫһc(din)(Еr(sh)ҲҪ)˳ѭԭtǣ?jin)Ԫ·һc(din)Ȼ빫ĵؾȥ@(du)༉(j)·(li)vԴؾĂ(do)˕r(sh)(yng)עڰž·r(sh)̖(ho)·^(gu)С̖(ho)·ԱMpС̖(ho)·(du)С̖(ho)·ĸɔ_ڜy(c)ϵy(tng)мԴ̖(ho)l(f)ݔж༉(j)·һ\(yn)ņԪ·Mÿ(g)Ԫ·Ҫһc(din)ݔݔԴĵҪMһc(din)ȻBӵĸ@N·УģMԴؾҪĴ̖(ho)Ԫ·ݔ(j)ġء̎(yng)̖(ho)l(f)̎
(du)ڜy(c)еĴ̖(ho)ϵy(tng)Ĝy(c)ٙC(j)̖(ho)ǰ̎·ģM·O(sh)Ӌ(j)עώc(din)߀Ҫעݔ̖(ho)ġء(yng)༉(j)̎·ǰ(j)̎(yng)S㌢ݔ̖(ho)ġءϵy(tng)c(din)ġءݔһݔ˵̖(ho)ҪСʴ̎ѭԪ·һc(din)ԭtҪ
Ҋ(jin)Ă(do)ģM·߀|(zh)Ă(do)|׃Dzô\(yn)ŵģM·ݔˌ(du)N^ͬ˱MҪֱͬ{(dio)λĻ(dng)B((dng)˾дĽ|)
Մ\(yn)ŵͬ(顰̓ءͬ)(du)dzģM·Ժ늸Ҫeע@Щ_ֱɔ_(du)ڸ桢迹С̖(ho)Ŵ·Ҫע@һc(din)
˱Ըɔ_B\(yn)ŵͬ˵^(gu)L(zhng)䑪(yng)ֱӏǰϵλһ˵\(yn)ŵݔ˵(du)ڸݔ迹漰\(yn)·һĴʩ߀(yng)ȡͬ˵κb乤ˇʩ