VFD (Variable-frequency Drive) is applied to fans and water pumps

1 Overview

1.1 Energy situation and energy conservation

Energy shortage and environmental pollution are common problems faced by mankind today. According to statistics, the world's proven oil reserves are only sufficient for 30 to 50 years. China's total natural resources rank seventh in the world, and its total energy resources are about 4 trillion tons of standard coal, ranking third in the world. However, China has a large population and is relatively scarce in energy resources.

With the acceleration of industrialization and urbanization, oil demand will show strong growth. If active and effective measures are not taken, China's dependence on the international oil market will reach about 50% by 2020. In addition to petroleum resources, the shortage of some important mineral resources has become increasingly prominent, and some important raw materials need to be imported for a long time. Therefore, in order to solve the problem of resource strategy, we must vigorously carry out energy conservation and comprehensive utilization of resources.

Electric power resources are the top priority among resource strategic issues and an important foundation for national economic and social development. The power construction cycle is long and must be based on the present and long-term. The construction of power projects has a great impact on the development of natural resources and the ecological environment. Facing the huge demand for electricity due to economic and social development, while accelerating development and construction, we must do a good job in saving, improving efficiency, and protecting the environment. At present, the focus is to vigorously publicize and advocate enterprises, units and residents to adopt advanced electricity technology and energy-saving and water-saving equipment. Through technological progress, we will gradually improve the efficiency of electricity utilization, save limited natural resources, protect the environment, and achieve sustainable development.

An important feature of the construction goals of the "11th Five-Year Plan" is that it puts forward target requirements in terms of output, doubling GDP per capita, and also proposes another very binding indicator. The energy consumption per unit of GDP is higher than that of the "10th Five-Year Plan". "20% reduction at the end of the period. There are three main ways to achieve a 20% reduction in energy consumption per unit of GDP, including structural energy conservation, promoting technological energy conservation and management energy conservation. It can be seen that energy conservation has become a government action and one of the priorities of the 11th Five-Year Plan.

As one of China's key energy-saving technologies promoted in electric power, high-power energy-saving control system speed regulation technology has obvious effects on energy saving. The total capacity of China's high-voltage motors is more than 150 million kilowatts (excluding low-voltage motors), and most of them are fans/pumps. Most of them work in a state of high energy consumption and low efficiency. Covering electric power, petroleum, chemical industry, metallurgy, manufacturing, environmental protection, municipal administration and other industries, its electricity consumption accounts for about 25% of the country's total electricity consumption. A characteristic of water pumps and fans/water pumps is that the load torque is proportional to the square of the rotational speed, and the shaft power is proportional to the cube of the rotational speed. If the rotation speed can be adjusted according to the required flow rate, a good power saving effect can be obtained, generally 20% to 50% of power can be saved.

At present, the application of energy-saving control system speed regulation for large-scale asynchronous motors in China has just started, but it has been widely used abroad. With the development of power electronic devices, there are various types of high-voltage energy-saving control system devices. Through their long-term operation practice, it can be found that the application of high-power energy-saving control system speed regulation system has good economic benefits and its reliability can also be guaranteed. Energy-saving control system speed regulation is recognized at home and abroad as the most promising speed regulation method due to its excellent speed regulation, starting and braking performance, high efficiency, high power factor, good power-saving effect and wide range of applications. .

1.2 Introduction to Chengdu Senwo Electric Co., Ltd.

Chengdu Senwo Electric Co., Ltd. is a high-tech enterprise in Chengdu; it is a governing unit of the Energy-Saving Control System Devices Branch of the China Electrical Equipment Industry Association; it has independent intellectual property rights and has become an annual output of more than 20,000 low, medium and high-voltage energy-saving control system devices. professional manufacturer. Sunwoele has more than 20 years of experience in the design and production of energy-saving control systems; based on a thorough understanding of motor control theory, a proficient mastery of power electronics and microelectronics technology, and an integration of microprocessing technology; it has successively launched different control methods (constant V/ F, vector), first-class energy-saving control system products with different operating modes (two and four quadrants), different main loop structures (two-level, three-level, multi-level), as well as electroplating, high-frequency heating and other power supply products . Motor and power supply energy-saving system products based on energy-saving control system technology have gradually become the company's main business, and have been widely used in energy, metallurgy, petroleum, chemical industry, building materials, plastics, textiles, HVAC, water supply, papermaking, printing and other transmissions field.

More than 80% of the company's current employees have a college degree or above and have rich experience in the development, design, and production of energy-saving control systems. We fully realize the strong demand from our customers for high-performance, high-reliability, low-cost and high-quality energy-saving control system products. We also fully realize that the high-tech industry based on energy-saving control system technology will bring huge impact to the traditional manufacturing industry. changes and a huge boost to society's material civilization. Based on our long-term accumulation of motor control technology and combined with oil field application practices, we have developed and produced special energy-saving products in response to the urgent energy-saving requirements of large energy consumers such as injection molding, air compression, and oil field extraction; for special environmental uses in mining, petrochemical and other industries To meet the needs, we have also developed a series of energy-saving transmission products for medium-voltage energy-saving control systems with rated voltages of 660 to 1140V. This product can also be customized as an explosion-proof special model according to user requirements. Focusing on high-voltage motors that drive large fans/water pumps and pump loads, we have developed and produced a series of energy-saving transmission products for 1.5-10kV high-voltage energy-saving control systems. This product fills the gap in Chengdu, and it has made Sunwoele the first professional manufacturer of energy-saving products for high-voltage energy-saving control systems in Chengdu. The application of the above-mentioned speed regulating products can bring particularly considerable energy-saving effects and very significant economic benefits to users. Based on such a cohesive and capable team, Sunwoele Electronics takes the development and manufacturing of China's first-class energy-saving control systems as its own responsibility and is determined to make unremitting efforts for it.

"If a worker wants to do his job well, he must first sharpen his tools." The company is equipped with advanced and complete equipment for development, production and service personnel. In accordance with the ISO9001:2000 quality management system, the company has formulated an effective management system for the enterprise to ensure the production of high-quality products while paying attention to every detail. provide assurance.

It is the consensus of many people of insight in today's market economy era that the market relies on services to maintain and develop. But Sunwoele's services are not limited to the maintenance of its own products; it also focuses on manufacturing high-reliability, professional products, such as injection molding machines, pumping units, air compressors, fans/water pumps, and high-pressure special energy-saving systems. R&D and application; providing value-added services in application fields such as energy saving and process improvement. All-round services and excellent quality are the guarantee of customer benefits. Our customers are the source of our enterprise's vitality, and our supreme reputation is our life.

Our aim is to attract customers with credibility, win customers with service, and reward customers with quality.

We firmly believe that all employees of Sunwoele Electronics who are energetic, united and enterprising will definitely make due contributions to the development of society and the rejuvenation of the nation.

Chengdu Senwo Electric Co., Ltd. has a complete management mechanism

Quality management: Managed strictly in accordance with ISO9001:2000 quality management system

Quality policy: Use advanced management to improve quality, and use aesthetic ideas to satisfy customers

Quality Assurance: Quality Assurance Commitment

Due to quality problems of the product itself, from the date of shipment: (Chinese domestic users) guaranteed return within one month, guaranteed replacement within three months, guaranteed repair within 12 months, (overseas customers) guaranteed repair within 12 months;

All products of our company enjoy lifetime paid service.

Market management: Strictly implement the agency system to protect the interests of dealers and agents

Regularly organize technical training activities for dealers and agents

Hold regular partner talks to establish a sound and close cooperative relationship

The company's offices at home and abroad only provide customer service and technical support and do not engage in any sales activities.

Competent agents can be appointed as customer service outlets in the region

1.3 The products of Chengdu Senwo Electric Co., Ltd. are summarized as follows:

◆High voltage energy saving control system

--HFV3000 1250kW

--HFV3000 5000kW

--HFV3000 8000kW

◆Standard type HSF600-T4 380V 1.5～400kW

◆Strong functional type HFV3000(P)-T