中文摘要：

在调查分析现有室内照明LED调光技术和产品的基础上,设计了墙壁开关式的LED调光器与调光驱动电源。为降低对电网的干扰,设计中避免了可控硅导通角控制模式,调光器通过分压方式沿单根电力线（火线）发送2-5 k Hz小幅值（-15 V）电压脉冲调光信号,由驱动电源接收电路检测并解调后改变驱动电路的PWM调光亮度级,调光操作结束后可稳定保持调光亮度级而调光器维持全角导通。调光器工作电流在导通和关断时分别通过单根电力线的电流耦合和分压方式提供,具有静态功耗低、电功率效率和功率因数高、输入电流谐波失真低的特点。

英文摘要：

Based on the investigation and examination on the current technology and products of dimming LED light source for indoor illumination,a wall switch style of LED dimmer and dimming driver were designed. To lower down the interference to the power grid,the controlling mode of TRIAC conducting angle was eliminated. Instead,the dimmer sends a 2 - 5 k Hz pulse dimming signal with small voltage（- 15 V） along the single power line,which is detected and demodulated by the receiving circuit of the driver to adjust the PWM dimming grade of the driving circuit. After the dimming operation,the dimming grade can be maintained stably while the dimmer maintains turning- on of the whole period of the power wave. The operating current of the dimmer is provided via current coupling and divided voltage respectively into the turning on and off states of the light source. The dimmer and dimming driver have low static power consumption,high power efficiency and power factor,as well as low harmonic wave distortion of the input current.