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With both intelligent hardware support and software service, ABB also provides ChinaCoal Datun Power Plant with 7 * 24 24-hour 400 online customer service, customized maintenance and repair programs and a well-equipped national after-sales service network to ensure the operation safety of the power plant at any time and anywhere.

The person in charge of Operation and Maintenance Department of China Coal Datun Power Plant said that through the adoption of ABB iVD4 ? The intelligent solution of the medium voltage switch further improves the safety and reliability of the power plant distribution system, makes the past tedious daily operation and maintenance management work more efficient and rapid, saves human and material costs, and promotes the green and intelligent development of the power plant. ABB is committed to the perfect combination of leading technology and industry expertise to help partners accelerate digital transformation and green intelligent development. Since 2019,

ABB has successively provided 65 sets of iVD4 intelligent circuit breakers and a full set of intelligent solutions for China Coal Datun Power Plant and Datun Yaoqiao Coal Mine Project, realizing the intelligent transformation of high efficiency, intelligence, green, low-carbon, safety and reliability. In the future, ABB will continue to help China Coal Group's intelligent mine construction and China's smart grid development, and write a new chapter in green construction of the coal industry. Now there are many industrial equipment hardware maintenance personnel, many of whom are from training schools. The teaching content of the training school is generally based on the domestic frequency converter as the teaching material. There are few explanations on servo (motion control) equipment, and even fewer DC speed regulators. It has to be said that training institutions have promoted the popularization of the industrial equipment maintenance industry, and the students who come out are not all excellent practitioners. However, there is a weakness in this industry. The theoretical reserve of maintenance is as important as the practical experience, while more imported brands and big brands, people's design schemes and product positioning are far more simple than the application of fan pump frequency converter, comprehensive and diversified, which makes maintenance a little stressful.

In fact, the development of frequency converter and DC governor is earlier, but the speed of development is widely used. Frequency converter has been far ahead of DC governor, which is why the country has been developing industry for 20 or 30 years, and there is no outstanding manufacturer of DC governor in China. According to the experience, the high-precision and high-power DC governors, all imported goods, are inferior to European and American enterprises in DC governor technology, but Japan is very powerful in the field of motion control. Common governor brands in the market, such as: German Siemens; Sweden abb; Parker 590; American ct emerson; United States a B Rockwell; Ansaldo, Italy, etc. Of course, there are some unpopular brands, the only one that does not have a domestic brand, including Taiwan.

A colleague in WeChat asked how many lines are connected to the DC governor output? It can be seen how far the popularization of industrial equipment maintenance is. The principle of DC speed governor is to control the motor to do work. As the name implies, the DC speed governor can control, of course, the DC motor. The manufacturing of high-power DC motor is complex and expensive. The digital DC governor is characterized by small size and large output power. The technical difficulty is that the control circuit is complex and requires high response speed. For example, if 660v AC frequency converter is required to achieve power above 1500kw, the hardware cost is not to mention that the chassis size should be several ten cubic meters. Two cubic meters is enough for DC speed regulators to output blocks with the same power. DC speed regulators have always played the same important role as frequency converters in the applications of steel, rubber and plastic, energy, chemical and other high-power, low-speed and high torque applications.

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