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This paper presents a control technique which permits supplying HPS lamps without using inductive, capacitive or resistive elements; the current through the lamp is established by the resistance of the plasma present inside the discharge tube. The lamp was supplied in a pulsating manner at high-frequency by means of peak current control in order to stabilize the plasma's temperature and, consequently,...
This paper presents the current stabilization technique for driving a HPS lamp at a pulsed high frequency without serially connected passive elements. The current is stabilized through the thermal inertia of the lamp plasma. The pulses modulated at low-frequency provide improved color rendering index and correlated color temperature for the light emitted by standard HPS lamps. The current stabilization...
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