Research On A New Type Lighting Lamp And Its Drive Circuit

As many disadvantages of traditional lighting technology and the shortage of energy, a high energy-efficient, pollution-free, environment-friend green lighting technology is demanded urgently to satisfy modern production and living. Solid LED which is a new type of energy-saving and environment-protective light source possesses huge development potential.First, a two-stage transform LED redundant driving circuit supplied with commercial power is introduced. The first circuit which rectifies commercial power and output stable voltage supplies to secondary N+1 redundant DC/DC converting circuit and controls the load voltage and current with current-mode loop feedback. Through PSIM simulation, it shows stable and safe output effect. Second, the soft-switching conversion technology is described in detail. Several soft-switching conversion methods which are suitable for Buck circuit are analyzed and the application of zero-voltage PWM converter in LED driving circuit is analyzed emphatically. Finally, based on solar power technology, the construction and working principle of solar LED street lamp system is analyzed. Maximum power point tracking(MPPT), safe and efficient battery charging and discharging and the cooling of LED lamps are discussed in particular. A new MPPT method and safer battery charging method are introduced. Related to reality, the parameters and components of a solar LED street lamp are designed, which provides a theoretical basis for the practical application of solar LED street lamp design.