Conductance model of light discharges

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Conductance model of light discharges
Department of Electrical Engineering, Faculty of
Mechatronics Technical University of Liberec -
Czech Republic

• for electric circuits modeling

Jan Koprnicky, Ales Richter
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scheme of the problem
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scheme of the problem
G-model of discharge lamps in electric circuits
Discharge lamps in electric circuits
Parameters
Data adjustment
Measurement
Identification
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Measurement of the lamp u(t) and i(t)

• using of EMU2 measurement device of KEL TUL
• using of commercial devices digital
  oscilloscopes
• frequency analyzers

u(t)
t
i(t)
t
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Data adjustment

• - for identification process
• G(t) counting
• u(t), i(t), G(t) filtering
• waves shifting
• waves inverting

shifting
u(t)
t
inverting
i(t)
t
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Identification

• G(t) differential equation using
• identification algorithm based on
• fminsearch()
• minimum of abs(g(meas)-g(count))

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Example
MB
HID lamp

• measured circuit and its model
• parameters are in vector a2 a1 b3 b2 b1 b0 in
  Lamp u(i) box

NET
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Waveforms of u(t) and i(t)

• measured

• simulated