5.21图5-70过载保护电路.ewb

两套EWB实例教程-3.8M.zip

8LDC<O0A<0H;4?@2LFL1<K82LG0D49LB8HH54?DD8G02<N01L$000@80@0J@0<C@6
L><80D@J4840<<@9L1@206L80H000J48044>LC8:<LHE@FH9H4<C@MDK04@?<AD?4
H<LH9D3DG4NDA<I<L09H3874<DGHD@44?<2LC8<@2L6L=LI06H0H1HA040408@H@@
044B8NHM4I<L<<@98G<M@4DN<<D2LBLLD684H8<LH:<6@6LBL2@C@G<302L7@>D:<
9@9@AH@@E<646H4@;@<D2<<8=HI8=46DD<G4G0C0MHG@C@B0:07@F87<D4DHN@F86
8N<L@J4K08H<H2@1HFHEHA034MLI4A@78J4;@?8?<:@FL@838DL3L<8?@ALA8A04D
M<<H20HHHH9@90I020<<:D2844<888ILJD<D4H4H1@1024H<<HK@6D2<J<3D7H>L<
<0@C4KD1DO00L$000@80A0A0648<0@A00H1880@0I@D45LALMHD@B4:<BH>HK49<I
L7D>0KHI@04B48H0L1D2064<@@0O@K00DB<M@6DDLI@;4=4KHK<ADMD6DLH1DC<6L
>DL@JH=L782<;D2<I@BL6@<@=LA<E4LDLH1DK4HHH00424F@H@K4@@C8E<G<5<4L8
H1DB0C0@0E4E<9<=884?HDLC@A0EHHH?02<8H6LH4@@C8C<=8HH9D6424<D@8><BL
K@00K4IHI@A@<8HH746@<@88H83464B43DB82<=81HH434@LH08@B@CDIDB8K03<:
HD8;4KLEDK0@@@@O<64DD14JLKD@@CHM<9DN8E0EHKLID<4K@MDOH3438I@242<4<
K@@@0<>088IL@44H:86@4H=D?@H<=8D8H8:D:04<E0C@DL4H2<14AH08OH04$000@
80D@J4840<@@1@2064<0>HNLK000J4800410B0?830N<@HIDC<78>8M<1<0@9@F8I
4CD6@>8I8?@948<2HKLHDID3<F8AD@40<48101024608@J86H?D?4C@7@=4BLGD<@
6H>0KHI@:DGL:L?4ILA@C4?<B0M06DDLI@K46@F<G4E<O<<8DHL@IHD01414JLL<=
82<MHE<147DNLML@DC@G0B0HDODND@40<<@0<M<LL8H9DJ0BD><<@488<0HA0C490
=H=H<@9LADC<A0=HA4A424;H30;D<<2<=8EHD4342HF014@<=<B4A42HHLA460G88
H4HN@;@;<80ID@0A4907@68<LCLC<J040?4B0<0ALC8DL4HL<4H48E4I41@E<8<0<
=@H@H0A4M8C8C460G42HN01L$000@80@0M@K40<D8@4H8?@><@0N<<H1HA06@78=0
@0B0<40<8@1@206<K<@094NHC8:<LH=@C8I49@DLC4<@CL64=LK0G@E44<FLD4ADD
<94>HG4B<8H9HC45L=4I0KH2HB<@HC<6L<@3<0<0L8@202048<@A0D@=DO8N870?4
J8EHE0EHG4G4IL<8HHA<50EHAD1D=L@L0<8@1DC0E4:42<J4@4305L2<MHB<A4M@@
0C0:0><80IH5H206<<048I8FL7H9<>8=@>L2<:DKHI0EH8H>H2<9@A0G4?4BLBH30
346<<4>0:<I@LD;0?L6H=@@8F0G<9<@@1@C@I0H@KH50C@D0M<J8509<4H58G@C@?
4BLL4>8D4442<28EHA8A4246LL45HC8J0><BLI@206L58O@H4K4M0>@D8046<N03@
7HO01<O00L$000@80@0G0B<8H9HC45L=4I0@0900<080HA00H18C<EL0L6L=LI06H
0H1HA040408@H02094K<N@LD>4N8D@;DNHB8K4H0?46<FL18>@J00064H<0HA0304
0=@L8<8C0:<LH=@?86L880H103@6<ML2H4<<HODFH2@D<4H;4<8I@3<6H=LM8I0KD
9<64=0B8;D<4>@@09@M074>0CLI48@>@<8?DBH00C4AD=L4<4LG0G0;86H94K@I@D
46<DD1@3D78=4K@MH9<=D9470DD943DFH1D=0;87L<DL@D8;8D8M4J4ML0LC4<@I<
I8@88<4D1L;@@@5H:HH8F0E4K<6@G46H<41L1@2L60F<4DK89D34;<?L<DHD?06<8
0H04@F<DHB864:8HLIDC04<<DK@H8L@;49@1@:LH8K0LDN0=85H04C070FD9@I4J<
DH=DD44L4LML?4F@H@<@:8HD9D38G82430C4I0CH?068<L9@386H=@KHFHN<0H5H6
85<80?4E<4@?<=H74NL>434@0A4><DL=86@0D<8K@G@ND@@@@J<;<J88D=4N@B@HD
F44<NDBLJ03028J43L8@H8J014?<C@<<O0BH?H?4@@64G0NDO054DH3HDD4D84@46
@D85<=LL@B0@D847@:05<O@A@9@N@HH>H1L><DDD4B<FH:0H@2<LHK@BDHHEDG<L@
I0A4H4;@M89<=8B<3840<HF8M<:L5HL03L$000@2@@000C48<CL@H68D848DL1H3D
6@:@H8A0<4:<0H4@FLK09<IL7D88KHG@<4:<0@1L3@7440@8@02044B8M@J<4@I@C
@6D40J8@0@094;<J810C0G@74B<<H9@206L<4K0L@J4:<8H5H=83@:H3<:HDLI@K@
M8J4:40<8@1@2068G<E<88LH8LD8KL206H=LHHE@=4N8@H9@;4;@@07D:0H8J0D4;
<94=HL<547@?0F48LA@E<84D<=@54;06<0L=8KD2494<<2LJ4N0F8G4B8HH1DC46L
>LB8G064N<:H1828@H@<N8<H9H3878=4KHBHNL@8500HID2<C0;4:0KD00>44<<L9
<6@<HFHJ@08@LID08D8<D;LID8HI0@0K4F0306LCL288L;@B02D<01HKDJ<8HA4ML
I4C@64=4K0F0=DH0C06L>0:LCHAHC4B4?8DDHDD@ODA@J@>46<LH90K4O0GH846HF
4EDC8J@<4;<<8C8B@;DE<MH2H><7HD<94FHG<N88H1H;4IH544L6H<L5@><D82D4@
946DKD<H<8G<146D=<KL0L<LL<<HB8?D:4E@7DMDJ@D@OD8DH<NHIDC@6@><@D;@2
4F@<LL@9D3D74=4J414?0=DB46448DL9@3@B0ND2D0<0H9@1@94><DL58=HJ8J03D
BL94>LNH70E4J<0H943074=DMLB82<@<DHLDALIHB@64<4K0D8<014C860><I8:@M
D48A<MLH<4@ADC<688LL@@@@4@<2HEDBLJ<=05L50486@1<684@E@303HJD0@:<M0
BH10G8=@8HH@GH=@?D48=8H07L$000@80@0C088LL1D3@4<>8I8H@04440L8@A@68
5<<8H000J480<44<NDI0EDE8G0948<<L1HA06@40<H<8?8KD54:<0H1HBD7@>0I8K
H2LB<@LB<78=DH@B@B4;<D<NDC43@5<3<J<I<=80<M09@342<@H=DN8A0A4I4L<1D
C468><I4KL;HN8?D90=4N@480@J8BLJL>@8@4@IDK@<8;084J8G@>49<I<<8:85D<
D<4M<B<ADA8K0BL1DA4E0?<>0:HB<B4309LM@6HI0A0A@58><I8B0HD4LILED>L3<
1@2L74848<M8JDB@FH=@08A<28C8N8DHAHC@F4AD10A89D?04DL<;<9054<<2HED1
<J@280L>D7LBHFDFH0D9<;H6@OHHHND8LN0F<>H74:8HH=DGD@@3D7<>4:4:<84@0
;89L<4K8B@D4?<D8J454E8801D?4J<0HIHK<E8>08<2LH4LDC@6D@89<J<JLG@3<E
88@=0:@H@1DK4F@0DO@0<$000@806@:00008D@3HD0@@B42<DH9D286L<<L@@0M@A
4A4J0<LI8CD68<DL0@0900<084HK4I0I43<68<D800@HDFD40684@A@C<60=@N8I@
946<2L;LA<A8B@409HI4JHC0O0@8H8B4<L;4><K<C068=HM07@@48<4LIDK<BHI4:
H?<I4>L9LBD4@8<IL984HEHHL2@G88DA41HBD6@=DI8=H>D9@D@M4N@0H5H6L>804
0<4HHHJ<O<N<HHND;0:0:DC4:<@H5@KHN<K81@I8C<F@4DJ<BH@0A4J@7@748L=H<
D;8H0E0A4=<JH4@1@;H70<8BDKH?084;D7D>DA<<D38IDBD;@64KDO8<8<@NL2H7H
JD;<:<8HL@B@A4A<284@MD:@HD9D38G81008EL98LH?@I8E@A0A4K@C@F<C8A4MD3
HM8D<B80L9H;4B@90C@J@=44<DHA@;@C<309D58:H3<8@<LI8C060=@I8H8D08<78
6HEDC4ED5D4<>DK@A@ADOH=4>4A@IHB8G0C4N8DHAHC@F410;0<<LD1DK<08LH5@8
8C0=0M04LDDA@;4F@5H9LM8J08DA<BHG814=80D54D<FD8@G@8D>D<<B89<A89L7L
7DAHD8ND:0A8JH<<54K@BH38;888L@1H@<N408BHH@1DK@48B<D@1DC@68<@H8G03
4E<G@1@O00L$000@38500004:81L9LM8J0@4K<BDD@1DC@68<@H8G034:<0H8@382
0608028KDA@D@>48<0HI83<6H<DLHKH4L4HGHALBH68>8KHD86H28N8@H1H;8;@C<
GH7@C8:8HHIDC@6@>@J8K0MDI<9<C<MD4D><F<;8EHM0@@74:<2H3L@LB<6L<@C<2
@2@LL3H54<DI@D8>DKD;8:<KHJ@B46<2HD41LB4D4O030@HG@5DI0KHG05D0D>@N4
@DDHBH2474>@A@I0542<0L@@;@;@?DK8DLA8K<486D2LELI@O8?00<BLN<50F<484
H<8=<IH<H4HDHJLCD68<DL0:0I40<2L8440C@J@=44<DHA@K@38ED9LA<1<4HDHBL
JD0H2H7@<<H8F0HD58B4A8EH=4D4;L:<8<A<2DC<FLE0<8JLC0CHC0B4:8HL=DD8B
894FHD878><I06DL<2L1H6D641H5D?H<@N4MH4<B8<H1H3D74=4H@J@D4B<FHC@48
K038A44LA0BH48FLHD5@ILC@F@10>8D4484DA0:<F86D8HK0@8H8B4LLAH=@M@3@N
<0@=HO@6HBL=@AD64=H9LBD4@8<N40H2@NHD0B8DH=D1@A4A4:@G4BD3<G4@0042<
L<M4OD?4L<N0;4BDG450;8JH<H:0KHD@>48<2LA4E<A4C@9D7<5D<0<88@7<:L@DH
41<8LE@J83<ALCLE<DL=HF46@MD98EHC0MHB@7H4<G<FLN0E4GH5804OL$000@H8I
0D4<<8@9HC47040L@@0A004D8@4082040O460@DEH>@E8L84H1DCD7440J8@0@0A4
=LNL0H5HLL:<<H8D9@L@LHC@JD9@=@FL7<<DI8H0D4B80L9H;4B@90C@J@=44<DHA
@K@M8EDMLL@A8ALH@=88<M09@342<@H=DF8HD70E85LELM4A098C4FH2D809H3078
>D9<FLH<DHHDNHB8K4DHE0ADG42D<@K@H@6L58L8@H5@<8C<4@=HHHI0HD5<K0I47
8:0E@HDC@G@44;<5@@8L8;8203428HH=D24I86<4LID;@G@2DE09014L8B@=@ADI4
4<504H9L9@4<E8@DC0K<HHB@>48<LL143@78=4KHFH9@FHHH30FDDL98B8D4<L4D2
<A4FDE0D@=4:<>HA<4<>4686L>8040<4HBH4HJ<707@:H<D9H34F850C@CD<H:0KH
D@>48<:L7438E4?4>86HFDFD@0:42<JLE@9430G@>0H@58GD:4>05D90KD<8=4M8B
D;@:4=460F8?<1<CLM854J808A<N0B0=43@2DB4F4F@10O00L$000@80@0M@C4884
LA@3@78:@J8F@540<881H10304038509@9LMDN<0H5HFL>4040<8H9@F8>DK8JH:L
3470:DLHB@440<485D5HJLF@@8N84HAD3<78><=L2@0<4H88M<L@?80@64I8F@@0:
4B<=@JD4@1@;HN@N@DD><N84@G<0@E4;<08J<<HEHL@A0M4LDL@1DC468><I4KL;H
N8GD;4J8M054?<0H68>49DA8F054;<D8A<>H8D@420448<4@1@CD=@<878NDLD6D3
D;D?44<<L1HCD44<49<74EDA8N424BDFL:D404LA@C<F4B4788HHL>4O0B4<<N@60
F@AHK0@@D4:<2H847@=0L@2H58=03<8@2HEL4DD8<DI<9D306H?4LHD@C4A<IL405
05@ADKHH0D4B<LHAD;<?0B@34;860;8IHL8L8H<4H7<:D>4B<@H5H88H@98B4C@9L
C42D64B4C<><:H6<F4KDMHB@540<@L983HG010O8;D24>DK8A0544<JLI@AH88B87
D:H3<8@<LI8K0@8D85@CH;H24G0:06H8LL@@@@4@<FHBHB8G064N<:HA82<G8C8@8
LHID3DFLD@ML4DA<54=4K8J@CD0LBLH<:<C@?@A4A@M0B85@0HH<4DL4JDK8=4:<L
HI<;@0824>0J89H<4H@6HG84HFD9D9@08GLHHD0749<F@D494F@5D1<>HIL:4:8HH
@@C0IHF@AD9@@8@@I0B@642<@H5@1HO0DLH<;@@@1H=@04OL$000@80I00404H<0D
1@3060<8@0=0D0000@I03@I0B@64><2LE4I<C46H=4K@KH4D8HC42H64<@J84H>0J
8K0B4:<@HED2@4L=8KL@HIH3<FH:8=D4H=D4<4L9@3<70>@J8F@54C<O88@J<M8JL
K8K04@L@I@84:<HL1D;D4LF4B8N@04CDF8JD?@2<346LA41H=HKHF@HD>LB0E<242
83DM@G0DDCH@<<4B<E0J<4H1@;H=4:8B<=0@8FH<@BHE45L>H=<7L7HC<L4B8M04@
LH1DC468;LK@J@=4N<0DIHC<F@BD6L0L8@K838@494;04H9@KDN8NDJD64KH2L2LH
@BL68=HH8A0GD5<:4A<5H=818>DJ8A@GD4<<45068=4LHH0<42<4HILBL6L>0M0>8
B8D@602HJL>8484LIDC46<<DL@L8B<ED>0><M0<8;<2<GDK@G@EDA@F0@DD@6HDH;
DHHG@>4<<@L9DC86H=4M0L8G8G@5D6@I<B@C45L=DI8F@?44<4L5LIHNH2DE@9@30
F84DGDEDF05D48G0<@=@:490;<K4G05H<HE<=L=@6410682@BL@HKHJ8NLLH9<38F
L<DMLM<?H4<A<:DO<J@?0<@<DL0KHAL9@K490AL4HMD;DO<6D;L:H1L248DL0K@2H
=8;LH<CLG0D@1<@878><E<5@=@L@8L6H2HC<6<FHO0B@>4A<FD;0;014=D5HIHDH>
0605L?8OD904<A@;0K<2D@DM4J<3<G4><D04H9DC<=0;<F0F0A4A4NLMD5D<@KHD8
4HEH0<ID:07L@4@D>LF0A49D?0885<<<@L=H<@A8L@=LMH1DO00L$000@I8I004B4
0H@@1@3060<0@0=0D0000@I03@K8@@H4N<0H9H306H>@3<N8DDA@C<60<8=LALK0O
<6H6424>8B48<6H=4J<2H>8LHD0E4L<@H5H4L28B<NHC44<<LI@K@=8@46<JL94J8
5H<4HHA@D4A<5<4<4H=LG4C46<2LJLH8IDC<4L>0B8E8ILA4A@M0I0I48<LDIDB06
L=D=<JL1428ADJ8BH@468<LL@@@=DD<943478=0KHB04D:<M8C<MDJ<GL@0?L$!00
4c72a9