主要研究了在不同电压下3.5 W、6 500 K的AC LED光源初态和稳态的光通量、光效等随着电压升高的变化情况。研究表明, 随着电压由205 V逐渐升高到235 V, 初态和稳态下AC LED光源的电流、光通量、功率均随电压的升高而升高, 初态下电流和光通量分别增长79.3%、75.3%, 稳态下电流和光通量分别增长80.28%、45.93%。初态和稳态下光效随电压的升高而下降, 初态和稳态下光效分别下降18.67%、33.22%。灯点亮后稳态下AC LED光源的最高温度随电压的升高而升高, 最高温度升高91.80%。结果表明, 电压的变化直接影响ACLED光源的光电性能。

The various states changing with voltage of the luminous flux and efficiency at initial and steady states of a 3.5 W and 6500 K AC LED light source are mainly researched under different voltages. Researches show that the current, luminous flux and power of AC LED light source at initial and steady states all rise with the voltage rising from 205 V to 235 V. And the current and the luminous flux at initial state increase to 79.3% and 75.3% respectively. The current and luminous flux at steady state increase to 80.28% and 45.93% respectively. However, the luminous efficiency at initial state and steady state drops along with voltage rising, the luminous efficiency of initial state and steady state drop to 18.67% and 33.22% respectively. After the lights up, the highest temperature of AC LED light source at steady state rises along with the voltage rising, and the highest temperature rises to 91.80%. Results show that the photoelectric performances of AC LED light source are directly affected by the changing voltage.