Yuav ua li cas diodes nyob rau hauv kev kho mob ventilators tiv thaiv Circuit Court kev nyab xeeb?

1, Kev tiv thaiv rov qab kev sib txuas tiv thaiv: thaiv qhov kev pheej hmoo ntawm lub zog tsis raug
Raws li qhov siab - cov cuab yeej kho mob muaj tseeb, yog tias lub tshuab hluav taws xob nkag ntawm lub tshuab ua pa rov qab los ntawm kev ua haujlwm tsis raug, nws yuav ua rau lub voj voog luv luv, cov khoom siv hluav taws xob, lossis txawm tias cov khoom siv tuag tes tuag taw. Los ntawm nws cov unidirectional conductivity, diodes tuaj yeem siv los tsim cov khoom qis - nqi thiab txhim khu kev qha tiv thaiv rov qab tiv thaiv circuits.

Cov ntawv thov raug:
Nyob rau ntawm lub hwj chim input kawg ntawm lub tshuab ua pa portable, ib tug series Schottky diode (xws li SK210) yog siv los ua kom muaj kev tiv thaiv rov qab. Qhov no diode muaj ib tug pem hauv ntej voltage poob ntawm 0.85V thiab lub ncov rov qab voltage ntawm 100V. Thaum qhov zoo thiab qhov tsis zoo ntawm cov khoom siv hluav taws xob thim rov qab, lub diode txiav tawm, thaiv txoj kev tam sim no thiab tsis txhob muaj kev puas tsuaj rau lub voj voog tom ntej. Txawm hais tias cov phiaj xwm kev sib txuas ua ke muaj qhov poob qis ntawm 0.7-1V, qhov qis qis rau pem hauv ntej voltage poob tus yam ntxwv ntawm Schottky diodes ho txo ​​hwj chim noj, tshwj xeeb tshaj yog haum rau portable li uas tsis muaj voltage thiab siab tam sim no.

Optimization Plan:
Rau siab- lub tshuab ua pa, siv lub tshuab hluav taws xob rov qab los ua ke nrog NMOS transistor thiab voltage regulator diode. Thaum cov khoom siv hluav taws xob txuas nrog zoo, lub rooj vag ntawm NMOS transistor tau txais qhov tig - ntawm qhov hluav taws xob los ntawm qhov hluav taws xob faib hluav taws xob. Tom qab conduction, qhov kev tiv thaiv sab hauv tsuas yog nyob rau hauv milliohm ntau, thiab qhov hluav taws xob poob tuaj yeem tsis quav ntsej; Thaum thim rov qab, NMOS transistor raug muab tua, cais tag nrho cov txhaum tam sim no. Qhov kev daws teeb meem no sib npaug kev siv hluav taws xob tsawg thiab kev ntseeg siab, thiab tau siv dav hauv cov khoom siv kho mob siab tshaj - kawg.

2, Kev tiv thaiv hluav taws xob tsis zoo: tiv thaiv hluav taws xob thiab hluav taws xob hloov pauv
Lub tshuab ua pa tuaj yeem ntsib qhov cuam tshuam ntawm qhov hluav taws xob tsis zoo xws li hluav taws xob cuam tshuam thiab kev hloov pauv sai ntawm daim phiaj hluav taws xob thaum lub sijhawm ua haujlwm, thiab cov hluav taws xob mem tes no tuaj yeem nkag mus rau cov khoom tsis zoo, ua rau cov khoom tsis ua haujlwm. Transient voltage suppression diodes (TVS) tuaj yeem clamp qhov hluav taws xob mus rau theem kev nyab xeeb hauv nanoseconds los ntawm avalanche tawg.

Core Parameters thiab xaiv:
Siv SMBJ33CA ua piv txwv, nws qhov kev txiav tawm rov qab - tawm qhov hluav taws xob yog 33V, qhov hluav taws xob tawg yog 36.7- 42.2V, qhov siab tshaj plaws clamp voltage yog 53.3V, thiab lub siab pulse tam sim no yog 11.3A. Nyob rau hauv lub hwj chim Circuit Court ntawm lub tshuab ua pa, TVS diode txuas nrog nyob rau hauv parallel mus rau ib tug tseem ceeb node (xws li lub input davhlau ya nyob twg ntawm DC-DC converter). Thaum qhov hluav taws xob ntau tshaj qhov pib tawg, TVS ua haujlwm sai sai, tso lub zog dhau mus rau hauv av los ntawm txoj kev tsis tshua muaj impedance, tiv thaiv qhov txuas ntxiv los ntawm kev puas tsuaj.

Multi-level kev tiv thaiv system:
Lub tshuab ua pa siab kawg feem ntau siv peb -theem kev tiv thaiv architecture suav nrog Gas Discharge Tube (GDT), Varistor (MOV), thiab TVS. GDT yog siv los nqus ntau txhiab volts ntawm xob laim hluav taws xob, MOV suppresses ntau pua volts ntawm lub zog hloov pauv, thiab TVS ua cov txheej txheem nanosecond transient pulses los tsim cov saw hlau tiv thaiv los ntawm ntxhib mus rau nplua, ua kom muaj kev ruaj ntseg ntawm cov cuab yeej hauv qhov chaw huab cua.

3, Teeb liab txwv thiab kho kom raug: kom ntseeg tau qhov tseeb ntawm cov teeb liab lom neeg tau txais
Lub tshuab ua pa sau cov cim tsis muaj zog xws li kev ua pa hauv pa thiab cov ntshav oxygen saturation los ntawm cov neeg mob los ntawm cov sensors, nrog amplitudes feem ntau nyob rau hauv millivolt ntau. Yog tias siab - lub suab nrov lossis qhov hluav taws xob sib xyaw ua ke thaum lub teeb liab kis tau tus mob, nws yuav ua rau cov ntaub ntawv distortion los yog ua rau lub tswb cuav. Lub diode tuaj yeem ua kom huv lub teeb liab txoj hauv kev los ntawm kev txwv thiab kho cov haujlwm.

Limiting Circuit Court tsim:
Nyob rau hauv lub teeb liab cua txias Circuit Court ntawm lub pa pa sensor, rov qab - mus rau - rov qab diodes (xws li 1N4148) yog siv los tsim limiters. Thaum lub teeb liab tawm tswv yim tshaj qhov hluav taws xob diode conduction (kwv yees li 0.7V), lub zog ntau dhau yog clamped kom tsis txhob muaj qhov saturation ntawm lub tshuab ua haujlwm tom ntej. Cov tswv yim no tuaj yeem cuam tshuam cov pulses uas tshwm sim los ntawm electromagnetic cuam tshuam (EMI) thiab xyuas kom meej tias lub teeb liab amplitude nyob rau hauv qhov chaw nyab xeeb.

Daim ntawv thov tag nrho yoj rectification:
Rau cov cim kev lom neeg uas yuav tsum tau ua kom muaj nuj nqis (xws li hauv siab impedance kev ua pa ntawm lub hauv siab), yuav siv tau tag nrho nthwv dej rectification Circuit Court uas muaj xws li kev ua haujlwm amplifiers thiab diodes. Qhov Circuit Court no hloov AC teeb liab mus rau hauv unipolar teeb liab los ntawm unidirectional conductivity ntawm diodes, thaum siv lub siab input impedance yam ntxwv ntawm kev ua hauj lwm amplifiers kom tshem tawm qhov voltage poob yuam kev nyob rau hauv ib txwm diode rectification circuits thiab txhim kho cov teeb liab tau txais raug.

4, Kub them nyiaj thiab voltage stabilization: yoog rau qhov chaw ua haujlwm nyuaj
Lub tshuab ua pa yuav tsum tau ua haujlwm nyob rau hauv qhov kub ntawm -20℃mus rau 50 degree, thiab qhov kub hloov pauv tuaj yeem ua rau cov khoom tsis sib haum, cuam tshuam rau kev ruaj ntseg hauv Circuit Court. Cov yam ntxwv kub coefficient ntawm diodes tuaj yeem siv los tsim kho qhov kub thiab txias circuits, thaum tswj qhov hluav taws xob tas li ntawm qhov tseem ceeb ntawm qhov hluav taws xob stabilizing diodes.

Temperature Compensation Case:
Nyob rau hauv lub teeb liab txias Circuit Court ntawm lub tshuab ua pa siab sensor, lub diode nrog ib tug tsis zoo kub coefficient (xws li 1N829) yog kev cob cog rua nyob rau hauv series nrog ib tug resistor los them rau qhov sib txawv ntawm lub sensor tso zis nrog kub hloov. Thaum qhov kub thiab txias, qhov voltage poob ntawm lub diode txo. Los ntawm kev kho cov input voltage ntawm lub chaw ua hauj lwm amplifier los ntawm ib tug voltage divider resistor, qhov cuam tshuam ntawm qhov txo nyob rau hauv sensor rhiab heev yog offset los xyuas kom meej ntsuas qhov tseeb.

Voltage regulator Circuit Court tsim:
Rau 5V fais fab mov ntawm lub tshuab ua pa tswj Circuit Court, TL431 adjustable voltage regulator diode yog siv los tsim lub precision voltage regulator circuit. TL431 stabilizes qhov tso zis voltage ntawm tus nqi teev (xws li 5.0V ± 1%) los ntawm kev kho cov cathode tam sim no, thiab muaj cov yam ntxwv ntawm cov lus teb ceev ceev kom tsis txhob muaj qhov hloov pauv voltage los ntawm lub zog ripple thiab load transients, muab lub zog huv rau digital circuits.