用于高强度放电灯的新型电子整流器电路

为解决高强度放电（HID）灯采用电子整流器时可能出现的音频共振问题，提出了一种新型的电子整流器电路.利用一低频信号对脉冲宽度调制（PWM）集成控制器内部的时钟信号进行频率调制，使得PWM集成控制器的输出信号成为脉冲宽度和频率都随时间变化的高频信号，利用该高频信号来驱动高频变换器，抑制了HID灯的音频共振，实现了HID灯的稳定工作.该电子整流器电路结构简单，具有体积小、可靠性高等优点.利用该电子整流器电路的设计思想，开发适合控制HID灯以使其稳定工作的专用集成控制块，将对HID灯的发展与应用带来重要影响.

New electronic ballast circuits for high intensity discharge lamps

A new type of electronic ballast circuit was proposed to solve the problem of acoustic resonance which may occur in the electronic ballast for high-intensity discharge(HID) lamps.Output signals of the pulse width modulation(PWM) control circuit becomed high frequency ones with variable pulse width and variable frequency by modulating the clock signal of the on-chip oscillator with a low-frequency signal.Driven by these high-frequency signals,acoustic resonance of a HID lamp was suppressed,and the HID lamp ran steadily.The structure of the proposed circuit was simple,dimensions were reduced and operating reliability was improved.The presented idea here made it easy to develop specific integrated circuits for HID lamps operating steadily,imposing a positive effect on the development and application of HID lamps.