The LED light is still flashing after turning off the lights, what's going on?
LED lights have brought us too much convenience. It is no compliment to say that the reason why today's nightlife can be so colorful is that LED lights are indispensable. But LED lights also have their flaws, that is, the "glass heart" - LED lights are much more sensitive to current than incandescent and fluorescent lamps. Therefore, if something goes wrong, it will show you the way of flickering and shimmering after turning off the light. Flashing and shimmering belong to the same type of failure, and the causes and solutions are the same, so they can be regarded as equal. Of.
Vzrok, da LED lučka utripa po izklopu stikala, ni jasen, zato ga morate enega za drugim izključiti. Obstajajo tri možnosti, zaradi katerih lahko LED lučka utripa po izklopu stikala:
1. Stikalo krmili ničelno linijo;
2. Svetilka proizvaja samoinduktivni tok-;
3. Ko je stikalo izklopljeno, še vedno prevaja tok.
Spodaj bom razpravljal o značilnostih in rešitvah vsakega vzroka.
stikalo za krmiljenje nevtralnega
Switching to zero control is a big taboo in lighting circuit wiring, and it is also the most common mistake made by many non-professional electricians. In the imagination of ordinary people, as long as there is a neutral wire and a live wire, the lamp can be lit, just like this▼
slika 1
But have you ever wondered what would happen if you reverse the order of the neutral and live wires? such as this ▼
slika 2
The above two pictures fully reflect the difference between the neutral wire and the live wire - the live wire always has a high potential, while the potential on the neutral wire is always zero. Let's look at Figure 1 first, where the live wire goes into the switch first, and then into the light. If the switch is opened at this point, the live wire is cut - the potential across the lamp is zero. Look at Figure 2 again. In this figure, the live wire enters the lamp first, and the switch controls the neutral wire at this time. When the switch is opened, the neutral in the line is disconnected - it is true that a circuit without a neutral cannot produce current (to be precise, a continuous high current). But the lamp is still connected to the live wire, in other words, the lamp still has a high potential.
Visok potencial na žarnici ustvari potencialno razliko, ki posledično povzroči šibek tok. Majhen tok, ki teče skozi svetlobo, bo povzročil utripanje - ta majhen tok dejansko vpliva na zaganjalnik luči in žarnice z žarilno nitko brez zaganjalnika ne bodo utripale.
Dolgoročno{0}}tako ne vpliva samo na življenjsko dobo žarnice. Prav tako predstavlja nevarnost za varnost vzdrževalnega osebja pri zamenjavi luči. Zato, če se to zgodi, je treba črto pravočasno prilagoditi.
Kako ugotoviti, ali stikalo krmili žica pod napetostjo? Uporabite električni svinčnik za merjenje stikala ali terminala žarnice. V normalnih okoliščinah, potem ko je stikalo odklopljeno, lahko stikalni del žice prižge električni peresnik, del svetilke pa ne. Če je ravno nasprotno, potem stikalo krmili nevtralno.
Tudi, če vse luči v prostoru utripajo, je možno, da je nevtralna žica obrnjena na razdelilni omarici. V tem trenutku je treba napeljati v razdelilni omarici - nevtralno žico svetlobnega tokokroga obrniti.
Luči ustvarjajo samo{0}}induktivni tok
If the wiring at the lamp is dense, it is possible to induce induced electricity—two wires placed in parallel, close together, will form a capacitance. Having a high potential on one of the wires (live) and not the other (neutral) causes the neutral to be charged. At this time, the electricity on the zero line is induced electricity.
Če je inducirana elektrika na ničelni črti v tem trenutku majhna, se bo kopičila na notranji kapacitivnosti zaganjalnika svetlobe, dokler elektrike ne bo dovolj, nato pa se bo naenkrat sprostila - izgleda kot luč utripa. Če je inducirana električna energija na ničelni črti v tem trenutku velika, bo na liniji še naprej nastajal tok, zaradi česar bo žarnica rahlo svetila.
Tok samoinduktivnosti{0} je težko odstraniti, zato je priporočena metoda poraba tega dela moči. Metoda je, da kupite 220V AC rele, priključite tuljavo releja zaporedno s svetilko - uporabite tuljavo releja za odstranitev samoinduktivnega-toka.
Stikalo še vedno prevaja tok, ko je stikalo izklopljeno
Some switches don't completely break the circuit when turned off, but still draw a small current in the circuit - I'm talking about switches with an indicator light. The indicator light of this kind of switch still needs to work after the switch is turned off, so although the switch is turned off, there is still a conductive part inside.
Ta del toka je zelo majhen, zato na večino svetilk ne bo veliko vplival. Če pa gre za LED luč, ki je bolj občutljiva na tok, lahko povzroči svetleče ali utripanje. Trenutno obstajata dve rešitvi. Prvi je, da povežete rele zaporedno, kot je navedeno zgoraj. Drugi je, da odstranite indikatorsko luč ali zamenjate stikalo.
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