250W高压钠灯电子镇流器的研究

为满足人们对绿色照明的要求，该文设计了节能、高功率因数及总谐波失真低的高压钠灯电子镇流器来替代传统的电感式镇流器，采用有源功率因数校正、恒功率控制、低频方波驱动的三级式结构的电路设计，并搭建了样机，实现了160V～265V宽电压输入，功率因数PF≥0.99，总谐波畸变因数THD≤9．1％，电路可靠工作，通过了电磁兼容传导干扰测试。

Research on Electronic Ballast for 250W High Pressure Sodium Lamp

In order to meet the need of modern Green Lighting, this article presents a electronic ballast for 250W high pressure sodium lamp to take place of the inductance ballast. The electronic ballast has higher efficient, higher power factor correction and lower total harmonic distortion. A three-stage structure circuit is proposed, including active power factor correction, constant power controlling and low frequency square wave driving circuit. This paper presents the circuit and establishes a ballast sample, 160V~265V wide voltage range input is achieved, power factor is increased to 0.99, total harmonic distortion is reduced to 9.1%. Moreover, the circuit is stable and has good electromagnetic compatibility which has passed the standard test condition.