Constant light control circuit for high power pulse xenon lamp with ultralong pulse width

Abstract

The invention provides a constant light control circuit for a high power pulse xenon lamp with ultralong pulse width. During charging preparation, a direct current charging / discharging power source charges a plurality of energy storage capacitors at first; after the xenon lamp is triggered to work, each energy storage capacitor is controlled by a time sequence pulse generator to orderly discharge to the xenon lamp through a corresponding switching element in sequence; in this way, light power output of ultralong pulse width can be obtained very conveniently and the working stability and reliability of the whole circuit are greatly improved, and wherein the number of the energy storage capacitors can be determined according to the required pulse width. Simultaneously, a light intensity feedback control circuit constantly regulates the light emitting power of the xenon lamp by detecting the light emitting condition of the xenon lamp so that the light power output of the xenon lamp keeps constant.

Description

technical field [0001] The invention relates to a control circuit of a pulse xenon lamp, in particular to a high-power pulse xenon lamp constant light control circuit with ultra-long pulse width for a pulse solar simulator. Background technique [0002] Solar simulators are commonly used to generate simulated sunlight for testing solar cells or solar modules. There are two types of commercial solar simulators: one is the steady-state solar simulator, which uses a constant light source (such as a steady-state xenon lamp, tungsten lamp or mercury lamp) as the light source, and this type of solar simulator usually has a small illuminated area , the temperature of the measured object rises faster; the second type is the pulsed solar simulator, which usually uses one or two long-arc pulsed xenon lamps as the light source. The temperature rise of the measured object is negligible. [0003] At present, the light source of the pulse solar simulator usually adopts a high-power puls...

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Problems solved by technology

[0003] At present, the light source of the pulsed solar simulator usually adopts a high-power pulsed xenon lamp. In practical applications, since the high-power pulsed xenon lamp works at high voltage and high current, the working pulse width of the conventional capacitor and capacitor bank energy storage discharge mode is usually Less than 40ms, if the working pulse width is required to be greater than 40ms (such as 100ms--200ms) and constant light is required, the conventional control circuit will be difficult to achieve

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