The cultural ministry’s science and technology innovation project titled “Optical Fiber, Network, and Intelligent Sine Wave AC Power Voltage and Brightness Control Devices” was undertaken by Guangzhou Siquande Lighting Co., Ltd. The aim of this project is to replace inefficient, energy-intensive, and noisy thyristor-based dimmers with environmentally friendly and energy-saving alternatives, thereby advancing China’s technology in intelligent sine wave dimming.
In order to address the issues of waveform distortion associated with traditional thyristor voltage control circuits, as well as the high power consumption and complexity of circuitry in such systems, a sine wave AC power voltage control driver based on integrated circuit technology was designed. This development forms part of a series of products for intelligent sine wave dimming, filling the gap in the use of such technologies in domestic venues such as theaters, television stations, and tourist attractions.
The project was initiated in 2010, and it passed the expert evaluation in May 2012. At the evaluation meeting, a committee of experts composed of scholars from institutions such as the China National Academy of Arts and Sciences, Shanghai Theatre Academy, National Theatre Technology Standardization Committee, China Radio International Architectural Design and Research Institute, the Cultural Troupe of the Air Force Political Department of the Chinese People’s Liberation Army, and Anhui Provincial Broadcasting Station, along with representatives from universities and end-users, assessed the project’s achievements. The experts gave high praise to the results obtained. It was concluded that the project combines pulse width modulation technology (PWM) with sine wave control using IGBTs, which is an innovative approach. The use of this technology helps reduce the high losses and elevated temperatures associated with IGBT transistors. By integrating IGBT-based intelligent sine wave dimming technology with optical fiber/network technology, the project gains greater sophistication and practicality. The project holds invention patents and independent intellectual property rights. Its product performance meets international standards and is at the forefront domestically. This project is valuable for reducing harmonic interference, eliminating the problems caused by dimmers on audio and video systems, and promoting new dimming technologies in the entertainment industry; it has broad market prospects. The evaluation committee unanimously agreed that the project’s results met the required standards.