Munzvimbo yemagetsi, maMOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) akabuda sezvinhu zvinowanika kwose kwose, ane mukurumbira nekushanda kwawo, kukurumidza kuchinja, uye kudzora. Nekudaro, chimiro chemukati cheMOSFETs, iyo diode yemuviri, inosuma chiitiko chinozivikanwa sekudzoreredza kudzoreredza, chinogona kukanganisa mashandiro emudziyo uye dhizaini yedunhu. Iyi blog positi inoongorora munyika yekudzoreredza kudzoreredza muMOSFET muviri diode, ichiongorora maitiro ayo, kukosha, uye zvazvinoreva kune MOSFET application.
Kuvhura iyo Mechanism yeReverse Recovery
Kana MOSFET yakadzimwa, ikozvino inoyerera nemugero wayo inongoerekana yavhiringwa. Nekudaro, iyo parasitic body diode, inoumbwa neyakagadzika chimiro cheMOSFET, inoitisa reverse ikozvino sezvo iyo yakachengetwa mugero inobatana zvakare. Iyi reverse yazvino, inozivikanwa sereverse recovery current (Irrm), zvishoma nezvishoma inoora nekufamba kwenguva kusvika yasvika zero, zvichiratidza kupera kwereverse recovery period (trr).
Zvinhu Zvinokurudzira Reverse Recovery
Iwo anodzoreredza ekudzoreredza maitiro eMOSFET emuviri diode anokonzerwa nezvakati wandei zvinhu:
MOSFET Chimiro: Iyo geometry, doping mazinga, uye zvinhu zvemukati zveMOSFET chimiro chemukati chinoita basa rakakosha pakuona Irrm uye trr.
Operating Conditions: Iyo reverse kudzoreredza maitiro inokanganiswawo nemamiriro ekushanda, senge yaiswa voltage, switching kumhanya, uye tembiricha.
Yekunze Circuitry: Iyo yekunze siketi yakabatana neMOSFET inogona kupesvedzera reverse kudzoreredza maitiro, kusanganisira kuvapo kwemaseketi e snubber kana inductive mitoro.
Mhedzisiro yeKudzoreredza Kudzoreredza kweMOSFET Application
Kudzoreredza kudzoreredza kunogona kuunza akati wandei matambudziko muMOSFET maapplication:
Voltage Spikes: Kudonha kwakangoerekana kwaita reverse ikozvino panguva yekudzoreredza kudzoreredza kunogona kuburitsa voltage spikes inogona kudarika iyo MOSFET's breakdown voltage, zvinogona kukuvadza mudziyo.
Kurasika Kwemagetsi: Iyo yekudzoreredza kudzoreredza ikozvino inobvisa simba, zvichitungamira mukurasikirwa kwemagetsi uye zvinogona kupisa nyaya.
Circuit Noise: Iyo reverse kudzoreredza maitiro inogona kupinza ruzha mudunhu, ichikanganisa kutendeseka kwechiratidzo uye zvinogona kukonzera kusashanda zvakanaka mumaseketi anonzwisa tsitsi.
Mitigating Reverse Recovery Effects
Kuti udzikise mhedzisiro yakashata yekudzoreredza kudzoreredza, nzira dzinoverengeka dzinogona kushandiswa:
Snubber Circuits: Maseketi eSnubber, anowanzo sanganisira resistors uye capacitor, anogona kubatana neMOSFET kunyorovesa voltage spikes uye kuderedza kurasikirwa kwesimba panguva yekudzoreredza kudzoreredza.
Soft Switching Techniques: Soft switching Techniques, senge pulse-width modulation (PWM) kana resonant switching, inogona kudzora kuchinjika kweMOSFET zvishoma nezvishoma, ichideredza hukasha hwekudzosera kumashure.
Kusarudza MOSFETs neLow Reverse Recovery: MOSFETs ine yakaderera Irrm uye trr inogona kusarudzwa kuti ideredze maitiro ekudzoreredza kudzoreredza pakuita kwedunhu.
Mhedziso
Kudzoreredza kudzoreredza muMOSFET muviri diode hunhu hunogona kukanganisa mashandiro emudziyo uye dhizaini yedunhu. Kunzwisisa mashandiro, zvinhu zvinopesvedzera, uye zvinokonzeresa kudzoreredza kudzoreredza kwakakosha pakusarudza akakodzera maMOSFET uye kushandisa nzira dzekudzikisa kuti ive nechokwadi chekuita kwedunhu uye kuvimbika. Sezvo maMOSFET achiramba achiita basa rakakosha mumasisitimu emagetsi, kugadzirisa kudzoreredza kunoramba kuri chinhu chakakosha chedhizaini dhizaini uye kusarudzwa kwemidziyo.
Nguva yekutumira: Jun-11-2024