Domestic High Voltage Large Capacity AC Direct Inverter Breaks Foreign Monopoly

“THV series high-voltage and large-capacity AC direct drive has its novel working principle and circuit structure as the world's first. It solves many shortcomings of current high-voltage frequency converters and is a major breakthrough in the field of general-purpose high-voltage frequency converters.” This was recently in Beijing. The THV series of high-voltage and large-capacity AC direct drive product certification meetings were announced by the Expert Committee.

The appraisal meeting was co-hosted by China Machinery Industry Federation and China Electrotechnical Society. Experts of the appraisal committee unanimously believed that the product has complete functions, advanced technology, high reliability, low installation and maintenance costs, and can be applied in many fields.

According to reports, the high-voltage and large-capacity frequency converters on the market currently use an AC-DC-AC circuit structure. This kind of AC-DC-AC technology solution has many rectifier and filter conversion links, and the circuit is complicated and the efficiency and reliability are relatively high. Low, especially the IGBT and IGCT core components on the DC link rely heavily on imports, and the core technology is completely monopolized by foreign companies.

Beijing Times Jinneng Electric Technology Co., Ltd. is a high-tech company specializing in R&D and production of high-voltage inverters. Its invented high-voltage and large-capacity AC direct-conversion solution is unique and adopts a cross-circuit circuit structure, eliminating the need for a DC link. Therefore, it does not require IGBT and IGCT bypass outputs, completely solving the passive situation of relying on imported core technologies.

According to Wang Jing, a manager of Beijing Times Jinneng, the THV series of high-voltage and large-capacity AC direct converters do not have electrolytic capacitors, which can avoid safety accidents caused by capacitor explosion and avoid the need to periodically replace capacitors and financial inputs. Small size avoids The use of units to increase the investment in equipment construction; no maintenance costs, no filter, adapt to high dust environment, so do not need to frequently replace the filter work; no special installation requirements, the equipment is installed directly in the pump room, summer can withstand high temperature and humidity The harsh environment can achieve maximum energy saving. According to the statistics of the operational records of the products that have been put into operation, the comprehensive energy saving rate has reached 29% to 53.1%.

At present, this technology has obtained a number of patented technologies in the United States and China, and the relevant technical principles have passed the PCT review.