Average Behavioral model of a 400W High Pressure Sodium (HPS) lamp. For details see: Moshe Shvartsas and Sam Ben-Yaakov, "A SPICE Compatible Model of High Intensity Discharge Lamps," PESC99, pp. 1037-1042, 1999.
 

Notes:
 

1. The model does not cover the  processes of ignition, warm up and the effects of acoustic resonance.
2. This is a simplified model version.
3. Two version are included high frequency ballast and a low frequency ballast. The difference is in the excitation and size of ballast inductor.
4. The model will run on PSPICE (MicroSim Inc.) Evaluation Version 8.

To down load the low frequency PSPICE schematics (compressed by zip) press here HPS_LF.ZIP  For the high frequency version press here HPS_HF.ZIP