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A new open-loop measurement system has been built up to test the stability of metal halide (abbr. MH) lamps in this paper. Based on the new measurement system, a lot of small power MH lamps (70 W) have been tested and arrived at the followings conclusions: 1) the acoustic resonance of MH lamp is caused by itself while it operates in high frequency; 2) the stable operating frequency range is about...
Based on the special application of electronic ballast in movie and television industry, a novel electronic igniter for HID lamps has been investigated in this paper. Compared with the traditional magnetic igniter, the circuit has many good performances such as substantially less volume and weight. The main contributions are as the followings: (1) A model of the igniter has been put forward to analyze...
In order to research the characteristic of HID with Medium-High Frequency, it is necessary to make a model for HID to describe the behaviors. Our works focus on the followings: 1) a few of external electrical properties of HID lamps have been measured to represent the V-I characteristic and output power vs. equivalent resistance as well as external voltage vs. equivalent resistance; 2) based on the...
Based on the electric characteristics of HID (high-intensity-discharge) lamps, novel control strategy and implement method for electronic ballasts of HID lamps have been investigated in this paper. The main contributions are as the followings: (1) to ensure to ignite the HID lamps safely, the auto-tracking technique, which can offer proper igniting voltage, has been put forward, (2) to make sure to...
A new modeling approach for the metal halide (abbrev. MH) lamp has been put forward in this paper. Our works focus on the followings: (1) Based on the low frequency behaviors of MH lamp, a new model for the MH lamp has been proposed. This model is simple but very useful; (2) The voltage waveform of the lamp is not sinusoid but looks like a square waveform, a method for estimating the voltage value...
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