Yuav ua li cas diodes txhim kho lub zog ruaj khov hauv cov khoom siv hauv chav ua haujlwm?

Ib, Kev Tiv Thaiv Yooj Yim: Tsim thawj kab ntawm Kev Tiv Thaiv rau Cov Hluav Taws Xob Hluav Taws Xob
1. Rov qab tam sim no thaiv thiab tiv thaiv rov qab tiv thaiv
Parallel fais fab mov ntawm ntau qhov chaw siv hluav taws xob yog ib qho qauv tsim hauv cov khoom siv hauv chav ua haujlwm. Piv txwv li, cov khoom siv hluav taws xob tseem ceeb thiab cov roj teeb thaub qab yuav tsum tau hloov pauv tsis tu ncua, tab sis tsis muaj kev tiv thaiv, lub roj teeb tam sim no yuav ntws rov qab mus rau qhov txhaum thaum lub zog tseem ceeb tsis ua haujlwm, ua rau muaj kev puas tsuaj ntxiv. Ordinary rectifier diodes (xws li 1N4007) tuaj yeem thaiv qhov rov qab tam sim no los ntawm unidirectional conductivity, tab sis lawv cov hluav taws xob conduction poob (txog 0.7V) yuav ua rau muaj kev siv hluav taws xob tseem ceeb hauv siab - zaus hloov cov khoom siv hluav taws xob. Yog li ntawd, Schottky diodes (xws li SS34) tau dhau los ua qhov kev xaiv zoo tshaj plaws rau siab -frequency power supply freewheeling thiab anti backflow vim lawv tsis tshua muaj hluav taws xob poob qis (0.3-0.5V) thiab lub sij hawm rov qab luv luv heev (<10ns). In the driving system of surgical robots, Schottky diodes can reduce energy loss and avoid motor control failure caused by reverse electromotive force.

2. Transient Voltage Suppression (TVS)
Cov cuab yeej siv hauv chav ua haujlwm feem ntau ntsib xob laim, hluav taws xob hluav taws xob (ESD), thiab hluav taws xob nce siab thaum cov khoom pib- nce thiab kaw. TVS diodes tuaj yeem clamp qhov hluav taws xob hloov pauv mus rau qhov chaw nyab xeeb hauv nanoseconds los ntawm avalanche tawg cuam tshuam. Piv txwv li, nyob rau hauv lub gradient amplifier ntawm MRI cov cuab yeej, TVS diodes tuaj yeem cuam tshuam qhov rov qab siab voltage tsim los ntawm kev hloov ntawm inductance coils, tiv thaiv cov khoom siv hluav taws xob los ntawm kev puas tsuaj. Cov tsis tseem ceeb muaj xws li rov qab tawg voltage (Vbr), clamp voltage (Vc), thiab ncov mem tes tam sim no (Ipp), uas yuav tsum tau ua kom raug raws li cov khoom siv tiv thaiv qib.

2, Dynamic adjustment: realizing ntse tswj ntawm lub hwj chim system
1. Siv qhov hluav taws xob rau qhov hluav taws xob tswj hluav taws xob diode
Kev soj ntsuam phais, tshuab tshuaj loog, thiab lwm yam khoom siv yuav tsum muaj lub zog ruaj khov los xyuas kom meej cov ntaub ntawv tau txais. Zener diodes (xws li 1N4742A) muab qhov tseeb siv hluav taws xob los ntawm cov yam ntxwv rov qab, thiab lawv cov dynamic tsis kam (Rz) tuaj yeem qis li 0.1 Ω, kom ntseeg tau tias cov zis voltage hloov pauv tsawg dua 0.1% thaum lub sijhawm thauj khoom tam sim no hloov. Hauv ECG kev soj ntsuam module, kev sib xyaw ua ke ntawm qhov hluav taws xob tswj hluav taws xob diode thiab lub tshuab ua haujlwm ua haujlwm tuaj yeem tshem tawm qhov cuam tshuam ntawm lub zog hluav taws xob suab nrov ntawm cov teeb liab electrocardiogram tsis muaj zog thiab txhim kho qhov tseeb ntawm kev kuaj mob.

2. Zoo tagnrho diode maub los: tshem tawm voltage poob poob
Ib txwm diode conduction voltage poob tuaj yeem ua rau txo qis zog, tshwj xeeb tshaj yog nyob rau hauv qhov tsis tshua muaj hluav taws xob xws li 3.3V systems. Qhov zoo tshaj plaws diode maub los (xws li LT4320) simulates lub diode muaj nuj nqi los ntawm ib tug sab nraud MOSFET, uas yuav txo tau qhov conduction voltage poob rau hauv qab no 10mV, thiab kuj muaj kev tiv thaiv rov qab, tshaj kub kaw, thiab raws li txoj cai indications functions. Nyob rau hauv lub teeb pom kev zoo ntawm chav ua hauj lwm, zoo tagnrho diodes tuaj yeem txo lub zog poob, txuas ntxiv lub neej ntawm LED, thiab zam qhov teeb pom kev tsis ruaj khov los ntawm kev hloov hluav taws xob.

3, Tsim kev ntseeg siab: yoog raws cov kev cai nruj ntawm cov xwm txheej kho mob
1. Dav kub thiab hluav taws xob tiv thaiv qhov cuab lub zog
Cov cuab yeej siv hauv chav ua haujlwm yuav tsum ua haujlwm ruaj khov hauv ib puag ncig ntawm -20℃txog 50℃, thiab qee yam khoom siv (xws li cov cuab yeej siv hluav taws xob) yuav tsum tau tiv thaiv hluav taws xob. Kev kho mob qib diodes tau ua tiav los ntawm cov txheej txheem tshwj xeeb, xws li siv iav passivation ntim (GP) kom txo cov dej ntws tam sim no, lossis siv cov khoom siv silicon carbide (SiC) los txhim kho qhov kub thiab txias. Piv txwv li, hauv X-ray detector ntawm CT cov cuab yeej, SiC photodiodes tuaj yeem ua haujlwm ruaj khov ntawm 175℃thaum tiv thaiv hluav taws xob cuam tshuam los ntawm kev puas tsuaj, ua kom cov duab zoo.

2. Rov ua dua thiab ua txhaum - tsim qauv tsim
Txhawm rau kom tsis txhob muaj qhov tsis ua tiav ib qho, cov cuab yeej siv hauv chav ua haujlwm feem ntau siv lub zog siv hluav taws xob rov ua dua. Diodes ua tiav kev hloov hluav taws xob tsis siv neeg thiab kev sib cais txhaum hauv cov tshuab no. Piv txwv li, nyob rau hauv ib tug phais navigation system powered los ntawm dual hwj chim qhov chaw, LOSSIS nyob rau hauv diodes tuaj yeem saib xyuas cov xwm txheej ntawm lub hauv paus thiab lub zog thaub qab thiab seamlessly hloov mus rau lub hwj chim backup nyob rau hauv cov kev tshwm sim ntawm ib tug thawj hwj chim tsis ua hauj lwm, nrog ib tug hloov lub sij hawm ntawm tsawg tshaj li 1 μs, kom ntseeg tau cov kev khiav hauj lwm tsis tu ncua ntawm lub system.

4, Cov ntaub ntawv siv tshuaj ntsuam xyuas
1. Da Vinci phais neeg hlau fais fab system
Da Vinci phais neeg hlau yog tsav los ntawm ntau lub cev muaj zog thiab yuav tsum muaj lub zog ruaj khov heev. Hauv nws lub zog module:

Input kawg: TVS diode (xws li SMAJ5.0A) suppresses transient overvoltage nyob rau hauv daim phiaj fais fab;
Cov theem nruab nrab: Schottky diodes (xws li MBR1045CT) yog siv los ua cov khoom siv log tsheb kom txo tau lub cev muaj zog rov qab electromotive quab yuam cuam tshuam;
Output davhlau ya nyob twg: Zoo tagnrho diode maub los (xws li LTC4412) paub txog kev hloov hluav taws xob tsis siv neeg thiab tshem tawm qhov poob qis.
Qhov kev tsim no ua kom ntseeg tau tias qhov kev hloov pauv ntawm qhov hluav taws xob tsawg dua 2% thaum lub sijhawm hloov pauv tam sim ntawd, kom ntseeg tau qhov tseeb ntawm kev txav ntawm caj npab robotic.
2. Gradient amplifier rau MRI khoom
Lub gradient amplifier ntawm MRI cov cuab yeej xav tau los tsim kom muaj lub zog sib nqus, thiab nws cov khoom siv hluav taws xob ntsib teeb meem ntawm qhov hluav taws xob siab thiab tam sim no. Cov kev tiv thaiv tseem ceeb muaj xws li:

Fast Recovery Diode (FRD): xws li MUR1560, nrog lub sijhawm rov qab los ntawm tsawg dua 50ns, siv los txhawm rau thim rov qab high voltage thaum lub sij hawm inductor coil hloov;
Zener diode array: muab qhov kev siv hluav taws xob ruaj khov rau kev tswj xyuas Circuit Court, tsis txhob teeb liab distortion los ntawm magnetic teb fluctuations.
Los ntawm cov qauv tsim saum toj no, gradient amplifier tuaj yeem ua tiav qhov tseeb ntawm ± 0.1%, kom ntseeg tau cov duab daws teeb meem.