Yuav ua li cas diodes ua hauj lwm nyob rau hauv lub zog tawm tswv yim systems?

Ib, Cov yam ntxwv ntawm diodes: lub hauv paus ntawm lub cev rau lub zog tawm tswv yim
Lub diode yog PN hlws ris qauv tsim los ntawm P-hom semiconductor thiab N-hom semiconductor, thiab nws cov yam ntxwv tseem ceeb suav nrog:

Unidirectional conductivity: Coj mus rau pem hauv ntej biased (nrog ib tug conduction voltage ntawm kwv yees li 0.6-0.7V rau silicon transistors thiab 0.2-0.5V rau Schottky diodes), thiab muab tua thaum rov qab biased (nrog rau microampere theem rov qab to tam sim no).
Kev hloov pauv ceev ceev: Lub sijhawm rov qab rov qab ntawm Schottky diodes yog ze rau xoom, thiab lub sijhawm rov qab rov qab ntawm silicon carbide (SiC) diodes tuaj yeem luv luv kom tsawg dua 10 nanoseconds.
Voltage thiab tam sim no cov yam ntxwv tsis kam: Muaj qib diodes tuaj yeem tiv taus ntau txhiab volts thiab muaj peev xwm tiv taus tam sim no tshaj li pua pua ntawm amperes.
Cov yam ntxwv no ua rau nws ua tau peb lub luag haujlwm tseem ceeb hauv lub zog tawm tswv yim:

Rectification: Thawj txheej txheem ntawm kev hloov pauv tam sim no mus rau qhov tam sim no ncaj qha kom ua tiav lub zog tawm tswv yim;
Nruam tam sim no: Nyob rau hauv lub cev muaj zog tsav los yog inverter circuits, nws muab ib tug tam sim no txoj kev rau inductive loads tiv thaiv voltage spikes;
Kev Tiv Thaiv: Tshem tawm qhov hluav taws xob rov qab los tiv thaiv kev cuam tshuam ntawm cov khoom siv hluav taws xob sab hauv lub zog tawm tswv yim.
2, Cov xwm txheej ntawm daim ntawv thov: los ntawm lub zog tshiab tsheb mus rau kev lag luam lub zog cia
1. Lub zog tshiab lub tsheb nres lub zog rov ua haujlwm
Thaum lub sij hawm braking txheej txheem ntawm hluav taws xob tsheb, lub log hub lub cev muaj zog hloov los ntawm kev tsav tsheb mus rau generating hom, ua peb -theem alternating tam sim no. Lub sijhawm no, tus choj diode rectifier (feem ntau yog tsim los ntawm 6 diodes) hloov AC lub zog rau hauv DC lub zog, uas yog tom qab ntawd boosted los ntawm inverter thiab them rau lub hwj chim roj teeb. Lub logic ua haujlwm yog raws li nram no:

Energy management strategy: The brake controller dynamically adjusts the recovery intensity based on the battery SOC (remaining charge). When SOC>80%, tshem tawm lub zog rov qab; Thaum SOC<70%, full power recovery occurs.
Cov kev cai xaiv diode: Siv Schottky diodes los yog SiC diodes nrog qis rau pem hauv ntej voltage poob los txo cov conduction poob. Piv txwv li, tom qab siv SiC Schottky diodes nyob rau hauv ib lub tsheb qauv, lub braking rov qab efficiency nce los ntawm 3% thiab qhov ntau yam nce los ntawm 5 kilometers.
Thermal tswj kev tsim: Nyob rau hauv cov xwm txheej tam sim no, lub diode ntim yuav tsum tau txais cov thermal tsis tshua muaj siab TO-247 lossis DFN8 × 8 qauv, ua ke nrog cov kua dej txias kom ntseeg tau tias qhov sib txuas ntawm qhov kub tsawg dua lossis sib npaug li 150 degree.
2. Lub zog tawm tswv yim chav rau industrial zaus converters
Thaum lub sij hawm deceleration theem ntawm cov cuab yeej xws li elevators thiab cranes, lub cev muaj zog yog nyob rau hauv ib tug generating lub xeev, thiab cov generated hluav taws xob lub zog yog pub rov qab mus rau lub DC bus capacitor los ntawm ib tug diode rectifier choj. Yog tias muaj lub zog ntau dhau, IGBT thiab diode ua ke hauv IPM (Intelligent Power Module) yog siv los hloov DC lub zog rau hauv AC lub zog thiab pub rov qab rau hauv daim phiaj. Nws cov ntsiab lus thev naus laus zis suav nrog:

Kev kho kom zoo: siv cov diodes rov qab sai (FRD) lossis SiC diodes, lub sijhawm rov qab rov qab tau luv rau 1/10 ntawm cov raj silicon ib txwm muaj, thiab kev hloov pauv poob yog txo los ntawm 70%.
Grid synchronization tswj: Los ntawm kev siv theem -locked loop (PLL) thev naus laus zis, cov lus tawm tswv yim tam sim no thiab daim phiaj hluav taws xob tau synchronized nyob rau hauv zaus thiab theem, nrog lub zog loj dua lossis sib npaug rau 0.99.
Kev tiv thaiv mechanism: TVS (tam sim no voltage suppression) diode clamps voltage spikes los tiv thaiv kev puas tsuaj rau cov khoom los ntawm xob laim ntaus los yog overvoltage.
3. Bidirectional converter rau lub zog cia fais fab chaw nres tsheb
Nyob rau hauv qhov xwm txheej ntawm daim phiaj hluav taws xob ncov shaving, lub zog cia system ua tiav cov nqi hluav taws xob hloov pauv los ntawm kev hloov pauv DC / DC bidirectional. Lub diode plays ob lub luag haujlwm hauv cov txheej txheem no:

Charging hom: Raws li cov khoom siv rectifier, nws hloov AC lub zog rau hauv DC lub zog thiab khaws cia rau hauv lub roj teeb;
Discharge hom: Raws li lub freewheeling diode, nws muab txoj hauv kev tam sim no rau lub inverter Circuit Court kom ntseeg tau tias lub zog zoo.
Noj 20 ko taw lub thawv ntim lub zog cia ua piv txwv, nws BMS (Battery Management System) siv 1600-1800 TVS thiab Schottky diodes rau roj teeb ntsuas, tiv thaiv overvoltage, thiab tiv thaiv kev sib txuas. Tom qab siv Trench Schottky diodes, qhov system efficiency nce 0.4%, thiab lub zog txuag txhua xyoo ntawm ib lub thawv tshaj 1000 kWh.