Half Current Line Stress by LED Lamps less 25 Watt Equipped With a Simple Nonlinear Passive PFC

Conference: PCIM Europe 2014 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/20/2014 - 05/22/2014 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2014

Pages: 8Language: englishTyp: PDF

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Jaschke, R.; Hoffmann, K. F. (Helmut-Schmidt-University / University of the Federal Armed Forces Hamburg, Germany)

Only the power factor of LED lamps greater than 25 Watt is regulated. The total RMS grid current of billions of LED lamps (e.g. 6 Watt) is too high. By using a simple nonlinear passive topology for Power Factor Correction in combination with a flyback converter this RMS value can be significantly reduced nearly by factor two. By this, the power factor of λ = 0.45 is increased to λ = 0.90. Concerning the big changing of the DC voltage can be neglected because the control of the flyback converter generates a constant LED-current. The presented measurement results verify this theory.