Is it isolated? What is the difference between isolation and non-isolation? PK is mainly carried out from 4 aspects: 1. Security First introduce what is isolation, isolated power refers to the input and output through the transformer to achieve electrical connection, the transformer conversion process is: electro-magnetic - electricity, not connected to the earth, so there is no risk of electric shock. The non-isolated circuit is that the input power is directly applied to the LED load after being lifted and lowered, posing a risk of electric shock. Therefore, it is necessary to pass UL, CE... these safety certifications, non-isolation is troublesome, insulation and creepage distance are not enough, can only be designed from the physical structure of the lamps. The lamp is acceptable, but also fully plastic, but the bulb is basically an aluminum casing, so that the PCB board and the outer casing are reinforced. The space available for the bulb power supply is extremely small, which is in addition to strict creepage requirements. complicated. As a product that can be safely used by end users, the reliability of insulation and isolation must be considered. 2. Performance Non-isolated due to less energy loss of the transformer, the efficiency can generally reach more than 91%, and there are higher power factors. The isolation energy efficiency is generally 88%, depending on the power, so the isolated power supply is also relatively hot. Non-isolated has less component stability but is worse, but why? The reason is that non-isolated circuits are very sensitive to surges and have poor rejection. In fact, it refers to the non-isolated power supply. When the shipment is in bulk, the repair rate is higher than that of the isolated LED driver, mostly because it is damaged. The probability of isolated power supply bursting is much smaller, and non-isolated is generally around 2% to 3%. Many grid voltages are unstable, non-isolated 300V straight-through output, destroying the chip and burning the LED load. Isolation will also be the phenomenon that the chip, MOS tube, and constant current loop are all burned out, but the isolation is relatively much less. Therefore, non-isolated surge-proof varistor is indispensable, and no varistor is guaranteed. 3. Cost and volume Compared with the isolated power supply, the non-isolated power supply mainly reduces the transformer, designs the architecture with the least amount of materials, and achieves the same product function, so the non-isolation cost has a great advantage. This is the reason why non-isolated power supplies are very popular in China. 4. Load range Generally, the isolated power supply has an output load range of 30-42V, and the non-isolated load range can be 30-84V. Many LED manufacturers choose the power supply for the overall adaptability requires the power supply to adapt to the full voltage 90-265V input, and the load range also requires up to 84V. This choice has certain risks and hidden dangers. At 90V input, the power supply may lose its constant current function, THD. Non-isolated is suitable for high voltage and small current, and the cost of making large current is not cheaper than isolation. Comprehensive comparison, these two power sources have their own advantages, non-isolated power supply focuses on higher power factor and efficiency, reducing energy loss, while isolated power supply pays attention to life safety and overall use safety of fluorescent lamps, in power factor and efficiency The aspect is slightly inferior to the non-isolated power supply, so different choices are also different. Health Care heat film is mainly used for Far Infrared Sauna Room heat film,health care product, Body Heat Film ,eye massage thin heated element,Infrared Heating Jacket, Flexible Heating Flim for ski suit,Heating Flim For Diving Suit.
Health Care Heating Film,Carbon Heating Film,Infrared Heat Film,Infared Heating ShenZhen XingHongChang Electric CO., LTD. , https://www.xhc-heater.com
we are a professional and leader Chinese exporter of heat film,Customization options (for example: SMT components, flex cable and connectors) can provide the perfect complete solution that can significantly reduce assembly time and increase productivity.Providing a variety of complex shapes design, and different power designs. Membrane in the same piece electrically heated heating circuit can be designed and holding circuit,we are looking forward to your cooperation.
0 times
Window._bd_share_config = { "common": { "bdSnsKey": {}, "bdText": "", "bdMini": "2", "bdMiniList": false, "bdPic": "", "bdStyle": " 0", "bdSize": "24" }, "share": {}, "image": { "viewList": ["qzone", "tsina", "tqq", "renren", "weixin"], "viewText": "Share to:", "viewSize": "16" }, "selectShare": { "bdContainerClass": null, "bdSelectMiniList": ["qzone", "tsina", "tqq", "renren" , "weixin"] } }; with (document) 0[(getElementsByTagName('head')[0] || body).appendChild(createElement('script')).src = 'http://bdimg.share. Baidu.com/static/api/js/share.js?v=89860593.js?cdnversion=' + ~(-new Date() / 36e5)];