China is a big country with big coal production in the world, and it also has a high electricity consumption per ton of coal. At the 15th China International Coal Mining Technology Exchange and Equipment Exhibition recently held, mining converters are favored by coal companies for their good operational results and economic benefits obtained from the transformation of coal mining systems.

Represented by mining frequency conversion equipment, some high-voltage inverter domestic leading companies are strongly involved in the field of low pressure and explosion-proof frequency conversion, making the former mid-low-voltage frequency conversion market is expected to "rule and rule."

Not only meet the process needs but also achieve energy saving

At the exhibition, a relevant person in charge of a coal company told the reporter that as China's variable-frequency technology is increasingly mature and the level of coal mine equipment continues to increase, more and more frequency converters are used in the production of coal mines, and the technical performance of coal mines and underground electrical equipment Energy-saving transformation has a positive effect on improving the modernization and automation of coal mining equipment and improving the economic efficiency of enterprises.

A Shenzhen-based inverter company official told reporters that China's mining market is an important area for high-voltage inverters. The mining system emphasizes safety, and the development model that our country's mining system has developed over the years is not ideal in terms of resource utilization efficiency and so on, leading to a great deal of room for technological transformation and equipment upgrading.

Safety is the most critical issue in the mining sector. Energy conservation in the mining system is an organic component of safety and is achieved at the same time as overall system safety.

Fan Kang, Sales Director of Hekang Variable Frequency Mining Division, told reporters that the use of frequency converters in coal mining equipment, such as elevators and belt conveyors, is a process requirement that can achieve soft start of equipment and extend the service life of equipment; on the other hand, Can increase efficiency, reduce energy consumption, achieve energy-saving purposes, can serve two purposes.

According to reports, by using frequency converters, coal mine fans and other equipment can save more than 30% energy.

Coal market downturn impact on the frequency conversion market

According to relevant plans, it is expected that by 2015, the total output value of China's energy-saving and environmental protection industries will reach 4.5 trillion yuan, and the added value will account for about 2% of the GDP. In the industry's view, the large-scale application of frequency converters will undoubtedly increase the efficiency of the energy sector and help achieve energy-saving emission reduction targets.

At the same time, according to the “12th Five-Year Plan” for the development of the coal industry, the production capacity of Chinese coal enterprises in 2015 will reach 4.1 billion tons/year, forming a large-scale coal enterprise of 10 million tons and 10 50 million tons. The production capacity of coal companies will be further enhanced. Coal mine equipment automation, digital control is the trend.

In the eyes of the industry, the current sluggish market in the coal market has a temporary impact on the inverter industry. In the long run, coal mining equipment will drive the rapid development of the inverter market.

A person in charge of the coal company who visited the exhibition told reporters that the coal industry is affected by the pressure of inventory this year, investment and production growth slowed down, and the enthusiasm for implementing frequency conversion energy saving will be affected. However, it is undeniable that the use of frequency conversion equipment in the coal industry is the only way for future industry development, especially in mining, transportation and other sectors.

Chen Yu, deputy general manager of Hekang Inverter Technology (Wuhan) Co., Ltd., told reporters that the frequency converter was based on the need for motor control, but it was found to have significant energy-saving effects in the process of use. “At present, only some of the major mines in the country have implemented frequency conversion, and most of them have only installed inverters on the main equipment. From this point of view, there is still a lot of gaps in the market,” he said.

An industry expert focusing on the inverter market told reporters that mine frequency conversion hoisting systems are in many cases the necessary equipment for coal production and will not be affected too much by the economic environment and the short-term payment ability of customers. The frequency conversion products of domestic leading enterprises have superior cost performance and can completely replace some high-end products abroad. As the cost pressure of coal companies increases, the possibility of purchasing domestic products will be higher.

The medium and low voltage frequency conversion market has the potential to replace the import

In 2012, due to the economic downturn in the domestic market, profitability of the main application industries of the high-voltage inverter downstream was difficult, and the demand for the high-pressure transformation market slowed down. The scale of new orders showed a certain decline year-on-year. The industry generally believes that with the gradual recovery of the economy in 2013, high-voltage inverter demand is expected to pick up.

According to reports, in the field of low-voltage inverter, many domestic inverter brands occupy a relatively small market share. In the field of high-voltage inverters, domestic inverter manufacturers have started late, but several leading companies have emerged. Domestic inverter products not only occupy a place in the field of general-purpose inverters used in fans and pumps, but also have considerable technical strength in the field of high-end inverter applications such as hoists.

Perhaps it is the potential of the medium and low-voltage inverter market to replace imports, and some domestic inverter manufacturers, which are gaining ground in the field of high-voltage inverters, have begun to enter the low-voltage inverter market.

"The low-voltage inverter market involves a wider area, with the development of technology and the gradual strengthening of energy-saving environmental awareness, the domestic inverter manufacturers have the strength and conditions in the low-voltage inverter market to recover lost ground." An industry source told reporters.

"In the past, there were a lot of explosion-proof inverters, but not many domestic companies that really made brands. In fact, explosion-proof inverters are not as simple as inverters and explosion-proof enclosures. What is tested is the software strength and integration capabilities of manufacturers." Ye Quanhai, general manager of Wuhan Hekang Explosion Proof Electric Co., Ltd., stated that “With the strong involvement of domestic leading companies, I believe the explosion-proof inverter market will be more standardized.”

An industry researcher told reporters that at present, although there are many companies in the market that are branded with inverters, there are not many companies that really focus on inverters. “Some inverter companies are even involved in the field of robots, which has affected domestic The overall improvement of the inverter industry.” In this person's view, if the domestic inverter industry wants to go further, we must make products around the inverter in a down-to-earth manner instead of blindly extending the industrial chain.

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