YUANNENGJI About heat dissipation, in order to make the LED street light power supply work in a relatively wide input voltage range of AC85-265V, the LED series-parallel connection mode of the light board is very important. Since the current power supply is generally a non-isolated step-down constant current power supply, when the required voltage is 110V, the output voltage cannot exceed 70V, and the number of series connections cannot exceed 23. When the input voltage is 220V, the output voltage can reach 156V, Das heißt, the number of series connections cannot exceed 45. The number of parallel connections cannot be too large, otherwise the working current will be too large and the power supply will heat up seriously.
APFC active power compensation is to first use L6561/7527 to boost the voltage to 400V, and then step down the voltage, which is equivalent to two switching power supplies. This solution is only used under specific conditions. The characteristics of ED lighting materials determine that they are greatly affected by the environment. Zum Beispiel, when the temperature changes, the current of the LED will increase, and the voltage will also increase. Long-term operation exceeding the rated current will greatly shorten the service life of the LED lamp beads. LED constant current is to ensure that the working current value remains unchanged when environmental factors such as temperature and voltage change.
1: For LED street lights, their design needs special attention. For manufacturers, the product structure design is relatively reasonable, but with the different environments and the continuous upgrading of products, the product structure will become more and more reasonable, so the heat dissipation and waterproof performance of LED street lights are difficult to guarantee, so for consumers, they must identify regular manufacturers.
2: Non-isolated, generally isolated power supply, such as 15W, is placed in the LED street light power supply tube. Its transformer is very large. Isolation can generally only do 15W. It is rare to exceed 15W, and the price is very expensive. Deshalb, the cost performance of isolation is not high. Allgemein, non-isolation is more mainstream, and the volume can be made smaller. Most non-isolation safety measures are well prepared, and there is no problem. If space permits, Eine isolierte Stromversorgung kann ebenfalls hergestellt werden.
3: Der Hauptfaktor der Wärmeableitungslösung besteht darin, dass die Leistungsperle der LED-Straßenlampe ihre Lebensdauer erheblich verlängern kann, ohne zu überhitzen. Allgemein, Aluminiumlegierung wird verwendet, was die Wärmeableitung erleichtert und die äußere Wärmeableitungsfläche so weit wie möglich vergrößert. Angesichts eines so riesigen LED-Marktes, ist dieser tatsächlich voller Vitalität und kann sich wissenschaftlich entwickeln.
4: Versuchen Sie, wasserdichte Steuergeräte zu verwenden, um eine langfristige Stabilität zu gewährleisten und gleichzeitig zu verhindern, dass Benutzer die Beleuchtungszeit willkürlich ändern. Da die Anschlussklemmen nach unten zeigen und die Verkabelung in Form eines U gebogen ist, kann dies verhindern, dass Wasser über die Leitung in den Controller gelangt. Den Kunden sollte geraten werden, hochwertige Kupferlitzen zu verwenden. There will be a certain loss of current and voltage during the output process, which will not only increase power consumption, but also cause the LED driver power supply to fail to work properly in severe cases.
5: The characteristics of LED lighting materials determine that they are greatly affected by the environment. Zum Beispiel, when the temperature changes, the current of the LED will increase. If it works for a long time exceeding the rated current, the service life of the LED lamp bead will be greatly shortened. LED constant current is to ensure that when environmental factors such as temperature and voltage change, its working current value remains unchanged.
6: Apply three primary colors or multi-color phosphors on purple or ultraviolet LED chips, and use the long-wave ultraviolet light or purple light emitted by the chip to excite the phosphors, wodurch eine Weißlichtemission erreicht wird. Dieser LED-Typ hat eine gute Farbwiedergabe, aber es gibt ähnliche Probleme wie bei der zweiten Methode, und die roten und grünen Leuchtstoffe mit höherer Umwandlungseffizienz bestehen meist aus Sulfidsystemen.
7: Es gibt drei Hauptmethoden für LED-Leuchtstofflampen, um durch Leuchtstoffe Weißlicht zu erzeugen, aber keine von ihnen ist vollständig ausgereift, was die Anwendung von Weißlicht-LEDs im Beleuchtungsbereich ernsthaft beeinträchtigt.