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Electric Equivalent Model for Induction Electrode less
Fluorescent Lamps
da Silva, M.F. ; Chagas, N.B. ; Schlittler, M.E. ; Fraytag,
Power Electronics, IEEE Transactions on (Volume:28 ,Issue:7)
DOI: 10.1109/TPEL.2012.2227501
Publication Year: 2013, Page(s): 3603 - 3613
Project Title
: Electric equivalent model for induction electrode less florescent
Lamps
Domain
:
Power Electronics
Reference
:
IEEE
Publish Year
:
2013 Page(s): 3603 - 3613
D.O.I
:
10.1109/TPEL.2012.2227501
Software Used
:
MATLAB
Developed By
:
Wine Yard Technologies, Hyderabad
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Electric Equivalent Model for Induction Electrode less
Fluorescent Lamps
This paper presents an electric equivalent model applied to induction electrode less
fluorescent lamps. The model is based on passive components and takes into account the
real and reactive lamp power. The presented model and its obtention methodology will be
an important tool for ballast designers. One of the most important features of the proposed
methodology is the concern regarding core losses and lamp reactive characteristics, because
nowadays there are no electric models including these characteristics. In order to obtain
and validate the electrode less lamp model, a series–parallel resonant half-bridge inverter is
used as ballast. Plasma and lamp windings are modeled as resistances and reactance’s
depending on the lamp power. Simulations employing the proposed model are also
presented, showing an excellent agreement with experimental results.
Electrode fluorescent lamp was only in the 1990s, developed a new type of product, and
compared to ordinary fluorescent lamps , due to the characteristics of long life , high
luminous efficiency , green market prospects are generally public lighting and road lighting
accepted by many companies at home and abroad and a large investment of manpower,
material research and development Promise lights and electronic ballasts . However, due to
the electrode less lamp cost, electromagnetic interference (EMI ) , heat , reliability issues
such as restricted its development , application , resulting electrode less lamp cannot yet be
applied widely
The paper first introduces the electrode less lamp background and status quo at home and
abroad , and then combined with the operating characteristics of the induction lamp and
literature , establish the electrode less lamp transformer model , and then through the
circuit equivalent obtained electrode less lamp LR equivalent model . The half-bridge
inverter resonant circuit, inductive load and capacitive load characteristics.
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Electrode less Fluorescent Lamps:
OPERATING PRINCIPLE:
It’s a new lighting source for the green lighting and energy was saving. The electrode less
discharge lamp uses an induction coil or energy-coupling antenna without electrodes, which
use the application of low-pressure gas discharge technology in providing lighting solutions.
The center of lamp is the induction coil powered by an electronic unit at the base of the lamp.
The glass assembly surrounding the induction coil contains an electron-ion plasma material
and is filled with inert gas. The inner portion of the glass is lined with a portion of the glass
which is lined with a phosphor coating similar to that in fluorescent lamps. The antenna
transmits the energy generated by the primary coil of an induction system to the gas filled
chamber where it creates ultraviolet radiation and is converted into lighting sources by the
fluorescent powder on the glass surface.
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Conclusion:
This paper has proposed a methodology to develop an IEFL equivalent electrical model.
Initially, important IEFL features were presented along with the differences of the proposed
model with those already available in the literature. Obtained results in Section V show that
the simulation model is extremely valid for predicting the operation behavior of the IEFL in
steady state. The proposed model does not represent the lamp dynamic behavior. This
accuracy is obtained because the model does not consider only the plasma resistance
variation, but also the lamp reactive component variation, as well as core losses. The
voltage and current waveforms shape and phase angles between them showed similar
characteristics in simulation and experimental results. The proposed methodology is
applicable to the IEFL model considering coupling coefficient near unity and may also be
used to different IEFL working frequencies. Despite the implementation of the model being
in the simulation software OrCAD/PSpice, it can easily be extended to other simulation
programs.
Screen shots:
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IEFL voltage and current experimental and simulation results for different bus voltages.
Voltage Scales: 250 V/div. Current Scales: 1 A/div. Time Scales:
2 μs/div. (a) 300 V Experimental. (b) 300 V Simulated. (c) 220 V Experimental. (d) 220 V
Simulated. (e) 140 V Experimental. (f) 140 V Simulated.
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