高圧ナトリウムランプのパルス点灯の解析

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タイトル別名
  • Analysis of the Pulsed High Pressure Sodium Lamp
  • コウアツ ナトリウム ランプ ノ パルス テントウ ノ カイセキ

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説明

The pulsed operation of high pressure sodium lamps has been analyzed. In pulsed operation, spectral intensities for the radiations with higher excited energy levels increase and spectral intensities for the radiations with lower excited energy levels decrease. By this spectral change correlated color temperatures of the lamps become higher. On the contrary luminous efficacies decrease by the increase of heat conduction losses, comparing with sine wave operation.<BR>The method for measuring time dependent arc temperature profiles has been established and applied to the cause of spectral changes, to suitable pulse conditions for spectral change and to time dependent lamp voltages.<BR>The increase of radiations with higher excited energy levels is due to the increase of arc temperature during pulse. The suitable conditions on pulsed operation for spectral change are lower pulse duty, lower frequency and smaller keep-alive current. These conditions correspond to the larger change of arc temperature in one cycle.<BR>Concerning with lamp voltage, the contribution from keep-alive current region is proved to be large when arc temperature becomes lower in that region.

収録刊行物

  • 照明学会誌

    照明学会誌 74 (10), 660-667, 1990

    一般社団法人 照明学会

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