WindSun Science & Technology Co., Ltd. (FGI) is a national high-tech enterprise affiliated with Shandong Energy Group, specializing in power electronics energy-saving control technology, and integrating R&D, production, sales and services into a whole. On April 13,2021, FGI went public on The Science and Technology Innovation Board. Stock code: 688663.
Bidirectional converter for rail transit: The brake energy absorption device is the core equipment developed by the company independently to deal with the brake energy of subway based on the mature mastery of high-power energy feed-back and grid-connected technology for more than ten years. In 2009, "regenerative energy feed-back grid-connected circuit and its control device" won the national patent, patent number: ZL200610044384.2; in 2014, it was listed on the first set of domestic equipment in key fields in Shandong Province, and was selected as a national torch plan project by the Ministry of Science and Technology in the same year. In 2015, it was recommended by the National Development and Reform Commission to enter the "National Key Energy-saving Technology Promotion Catalogue"; in 2016, it was selected as a key product of national strategic emerging industries; in 2018, the two-direction variable current type test power system of the subway traction power supply rectifier unit of the China Railway Inspection and Certification Center, which was independently designed and systematically integrated by FGI, passed the expert verification and was put into operation, and the power system undertook the domestic DC traction power supply equipment manufacturers, third-party type testing and commissioned testing, representing the highest design and manufacturing level of the domestic counterparts. In June 2022, FGI provided the first bi-directional converter that eliminated the traction rectifier unit in the whole line in the highest altitude Lijiang Xueshan rail transit line 1 in China, which once again leading the intelligent development of traction power supply.
Bidirecitonal converter for rail transit