机构地区: 深圳职业技术学院电子与通信工程学院通信工程系
出 处: 《哈尔滨工业大学学报》 2004年第6期833-834,共2页
摘 要: 通过采用在高频回路中加入低频信号调制的方法,改变灯端电流的频率,使其无法在放电腔中形成驻波.解决了金属卤化物灯的声共振问题.利用Saber仿真的傅里叶分析,选择出最佳的低频调制信号范围.根据仿真结果选定的参数应用于400W金卤灯实验,保证了金卤灯电弧平直、灯光稳定、功率恒定,并能够长期稳定地工作. An effective method of eliminating acoustic resonance in metal halide lamps (MHD) is put forward. When the low frequency sine wave is added to the control loop, the frequency of the lamp current is variable. So the standing wave does not occur in the arc tube. The best range of modulate frequency is chosen by Fourier analysis of Saber simulation. The simulation results are used for 400 W MHD. This method is effective in eliminating acoustic resonance and ensures the stability of the arc and the light.
领 域: [电子电信]