Table copper deposit evaluation useful components associated reference Component Pb Zn Mo Co WO 3 Sn Ni S Bi Au Ag Cd, Se, Te, Ga, Ge, Re, In, Tl Quality score % 0.2 0.4 0.01 0.01 0.05 0.05 0.1 1 0.05 >0.001 Mass fraction g/t 0.1 1 Led street light, compared with the traditional lighting technology, led lamps and lanterns have higher efficiency, and longer service life.Thus become the preferred bulb type, in order to reduce the energy consumption of indoor/outdoor lighting, get energy saving effect. Led Streetlight,Hight Power Led Streetlight,Led Street Lamp ,Led Solar Streetlight NINGBO ZHENHAI BOLANG METAL PRODUCT FACTORY , https://www.blcastings.com
For street lamps, higher efficiency and longer life are indispensable for cost reduction.Designed for the LED power supply switch power supply, also must have a high efficiency and durability, to ensure that it has as long as the LED life without maintenance.Here, the resonant converter is one of the most popular power supply topology, this is because compared with previous power supply topology, their performance has brought higher power efficiency, and can reduce EMI.Soft switch is an important characteristic of resonant converter.But the resonant converter used in parasitic diodes (bodydiode) can sometimes lead to system failure.Stored in the parasitic diodes charge must be clear, to avoid large current and voltage surge, including topology structure of high dv/dt and di/dt.