Kana frequency yekuchinja yetransformer yakakwira, vhoriyamu yayo inoderera. Saka, zvinoreva here kuti hapana muganho wepamusoro wefrequency yekuchinja? Saka, vhoriyamu inogona kuva diki here?
Mhinduro yacho haina kunaka. Mukushanda chaiko, kuwanda kwematransformer ane mafrequency akawanda kunotsanangurwa nezvinhu zvakawanda uye kunogona kukamurwa kuita zvinhu zvakasiyana-siyana:
1、 Circuit topology flyback topology: Matransformer ane mabasa ekuchengetedza simba uye kushandura, ane frequency inoshandiswa kazhinji ye40-100kHz. Kana frequency iri pasi pe40kHz, vhoriyamu yesimbi yakakura zvakanyanya, zvichikonzera vhoriyamu yemagetsi yakakura; Kana frequency ikapfuura 100kHz, kukwira kwevoltage kunokonzerwa nekubuda kwemhepo kunogona kukuvadza transistor inochinja.
Forward topology: Range yakajairika i60-150kHz, asi inoda kuyera kurasikirwa kwemagnetic core uye kurasikirwa kweswitch. Push pull/half bridge/full bridge topology: Symmetrical switch driven bidirectional magnetized magnetic core, inoshanda zvakanyanya, inotsigira ma frequency akakwira kubva kumazana e kHz kusvika ku MHz, asi inoda dhizaini yekudzora yakaoma uye kupisa.
2、 Hunhu hwezvinhu zve magnetic core hunosanganisira kurasikirwa ne magnetic hysteresis uye kurasikirwa ne eddy current. Mukati meimwe range, kurasikirwa kwe magnetic core kunowedzera nekuwedzera kwe frequency. Naizvozvo, zvinhu zvakasiyana zve magnetic core zvinofanirwa kunge zvine ma frequency akasiyana ekushandiswa kuti zvive nechokwadi chekuti magnetic core inorasikirwa zvishoma. Semuenzaniso, manganese zinc ferrite yakakodzera kushandiswa pama frequency ari pakati pe10 kusvika 300kHz, nepo nickel zinc ferrite yakakodzera kushandiswa pama frequency ari pamusoro pe1MHz.
Chechipiri, sezvo frequency ichiwedzera, simba guru re magnetic induction rinofanira kuderedzwa kudzivirira kuzara kwe magnetic core. Semuenzaniso, simba re magnetic induction reDMR40 i0.38T, uye pakugadzira pa frequency ye100KHz, tinowanzo tora kukosha kweinenge 0.2T.
3. Kumhanya kwekuchinja kwesimba remagetsi. MOS transistor ndeyemidziyo yemagetsi, ine nguva yekudzima mumasekondi mashoma. Frequency yekushanda inogona kusvika MHz, uye frequency chaiyo yekushandisa imazana akati wandei eKHz. IGBT ndeyemidziyo yebipolar, ine nguva yakareba yekudzima uye frequency yepamusoro yekushanda inowanzo kuve pakati pe40~50KHz.
4、 Kuwedzera kwekushanda zvakanaka uye kuwanda kwekupiswa kwemoto kunotungamira mukuwedzera kwekurasikirwa kweswitch nedrive, zvichikonzera kudzikira kwekushanda zvakanaka uye kuwedzera kwekugadzirwa kwekupisa. Kuti tive nechokwadi chekuti tembiricha yechigadzirwa iri mukati mehuwandu hwakajairika, tinoda matanho akawanda ekugadzirisa kupisa.
5. Pama frequency akakwira, mutengo unowedzera nekuda kwekurasikirwa kwakawanda kweswitch, zvichida matanho akawanda ekugadzirisa kupisa, zvichikonzera kuwedzera kwemitengo. Chechipiri, ma capacitor nema inductors anowanzo sangana nekudzikira kwekushanda pama frequency akakwira, uye tinofanira kusarudza zvishandiso zvakakodzera ma frequency akakwira, izvo zvinowedzera mitengo. Mukugadzira kwakakodzera, mitengo inogumira, iyo inowanzo sarudza muganho wepamusoro we frequency yekushanda.
6、 Hunhu hweChip: Machipisi ePWM control anowanzo kuve nezvinodiwa zve frequency upper limit kuti apindure kune dynamic load adjustments. Izvi zvinoonawo kuti switching frequency ye transformer iri mukati meimwe range.
Nguva yekutumira: Nyamavhuvhu-06-2025
