Circuit Design of Xenon Lamp Power Control System Based on K60

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Overview:
Based on the analysis of the working principle of Xenon lamp, this paper proposes a design scheme of Xenon lamp power control system with Kinetis 60 microcontroller as the core. The design includes power conversion circuit, boost control circuit and human and interactive interface circuit. The current feedback and optical feedback control algorithms are used to ensure stable output of light. The system incorporates the ability to turn off and accumulate working hours for xenon lamps. Practice has proved that through the debugging of software and hardware, the system designed in this scheme can run stably and meet the control requirements.

1. Introduction The advantages of xenon lamp light source compared with other electric light sources are high luminous efficiency, low energy consumption, high energy density and long-term continuous illumination. The energy distribution of xenon lamp radiation spectrum is close to that of daylight, and the color temperature is about 6000K. point Light. It is widely used in color inspection of cloth fabrics, aging test of drugs, plastics, plant cultivation, photochemistry, etc. as a source of artificial aging and simulated sunlight.
With the rapid development of science and technology, especially the maturity of power electronics technology, semiconductor technology and sensor technology, various power devices are emerging, and the power supply technology of xenon lamps is also constantly developing, which makes the application field of xenon lamps wider and wider. Therefore, it is necessary to design a stable and reliable xenon lamp power control system.

2. The working principle of Xenon lamp The structure of Xenon lamp is different from that of commonly used incandescent lamp. There is no tungsten wire. The quartz bubble shell is filled with high-pressure helium gas of 0.019~0.0266MPa. It is a light source that achieves illumination through gas discharge. It has two positive and negative The electrode has an interelectrode distance of less than 10 mm, and the helium gas is ionized into positive and negative ions under high pressure to have electrical conductivity. The positive and negative electrodes perform arc discharge to generate an arc, and the arc activates the inert gas helium gas to promote the metal salt to emit light.

3. System overall structure design The design of the Xenon lamp power control system mainly includes two parts: hardware system design and software system design. The hardware system mainly includes the main controller and the xenon lamp power supply system. The block diagram of the composition is shown in Figure 1.

The software system design includes liquid crystal display program, key scan program, current, voltage, light sampling program, and current and optical feedback control algorithm programs. Through the design and joint debugging of the hardware and software control system of the xenon lamp source, the reliable and stable operation of the control system is realized.
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