等価回路モデルによる磁気飽和進相型安定器の動作解析

抄録

The performance characteristics of a lead peaked ballast is analyzed using the equivalent circuit model and the discharge voltage-current model. The operating temperature of the lamp is 40°C or 0°C. The obtained results are as follows:
1) The discharge current consists of the currents flowing through the leakage inductance and the saturated inductance based on the splined-gap in the secondary iron core. The discharge current waveform can be controlled by adjusting the ratio of the two current components and the phase difference between them.
2) The crest factor of the discharge current takes a minimum at a certain N₂/N₁ ratio when the peak of the output voltage under a no-load codition is kept constant, where N₂/N₁ is the ratio of the secondary and the primary winding numbers.
3) The crest factor of the discharge current decreases with increasing the width of the splined-gap, when the output wattage is kept constant by adjusting the other circuit parameters.
4) The off-time is produced at the reignition phase when the reignition voltage of the lamp overcomes the applied voltage supplied through the circuit.
5) When the operating temperature of the lamp is low, the applied voltage through the circuit decreases, while the reignition voltage of the lamp increases.
6) The crest factor of the discharge current decreases while the applied voltage increases, when both of the splined-gap width and the capacitance increase.