FREQUENCY MODULATION METHOD AND DEVICE FOR HIGH IN

专利名称：FREQUENCY MODULATION METHOD AND

DEVICE FOR HIGH INTENSITY DISCHARGELAMP

发明人：MOSKOWITZ, WARREN P.,MUEHLSCHLEGEL,

JOACHIM

申请号：EP05798394申请日：20050920公开号：EP1800522A4公开日：20100818

摘要：An electronic control gear for a HID lamp receives an input signal for operatingthe lamp and frequency modulates the input signal to generate a frequency modulatedoutput signal that drives an arc of the lamp. The frequency modulation of the outputsignal sweeps continuously between a low frequency modulation and a high frequencymodulation, the low frequency modulation being a frequency f1 in a range of 125kHz to150kHz and the high frequency modulation being a frequency f2 in a range of 230kHz to300kHz, where f2 - f1 is at least 0.4 * f1. A power amplifier changes an amplitude of thefrequency modulated output signal during the low frequency modulations so that acurrent amplitude of the frequency modulated output signal is substantially constant,and a variable gain transformer adjusts a voltage of the frequency modulated outputsignal during starting of the lamp.

申请人：OSRAM-SYLVANIA INC.

更多信息请下载全文后查看