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Industrial design and innovation of frequency converter

1 introduction

first of all, a paragraph of HP RTM production solution by German Chancellor Gerhard, a leader in the composite industry, is quoted Schroder's words, and thus the following discussion begins:

if Germany wants to strive for more opportunities in the globalization of the 21st century, the fun of creation and innovation is essential. New circumstances and conditions have created new jobs that are more modern and require more possibilities. Industrial design is becoming more and more important. The development and perfection of technology will not necessarily achieve commercial success. In this era of diversified lifestyles, people will have more needs for life, and the goal in the future is to give these lifestyles more space and freedom to be reflected

product design represents individuality. Shape and color are expressions of feelings about life. Those who recognize uniqueness and integrate it into the enterprise strategy will be the winners of tomorrow. In today's world, knowledge is growing rapidly, information is becoming more and more precious, the value of industrial design is becoming increasingly prominent, and the changes in society and technology bring more challenges, but also provide more space for design. Today's design is mainly to make it easier for people to use more and more complex products, and to make technology and information easier to become a part of life. As a bridge between advocacy and products, design has become an important pioneer in this society

in this paragraph, I think there are two points worth serious consideration and active practice by our domestic frequency converter enterprises and electrical drive industry personnel:

(1) the importance of industrial design (product design)

(2) creation and innovation

2 industrial design (also known as product design)

for mass-produced products, by virtue of training, technical knowledge, experience and visual experience, giving new quality and qualification to materials, structures, forms, colors, surface processing and decoration is called industrial design. Designers' knowledge, experience and visual evaluation ability to solve problems such as product packaging, publicity, display and market development also belong to the category of industrial design. Product design is industrial design in a narrow sense, and it is also the main content of industrial design. So people often call product design industrial design

industrial design sprouted in the 1860s and has developed for more than 100 years. It is the product of the organic combination of modern science and technology and art. In the era of market economy, due to mass production of products, numerous manufacturers and fierce competition, the market has changed from supply exceeding demand to supply exceeding demand. Enterprises begin to realize that the production and sales of products are not entirely dependent on the level of technology and production capacity, but also need to consider various factors from consumers, the market and society. In the era of increasingly serious product homogenization, it has become a very effective magic weapon to improve product and corporate image, highlight personality and attract consumers' attention through product design. For example, in recent years, due to its emphasis on product design and brand building, Samsung Electronics has defeated many Japanese, European and American enterprises and become a world electronics enterprise with brand value second only to Sony

the difference between an engineer and a product designer. Engineers mainly solve the relationship between objects in product design, such as product performance index, structure, coordination between various parts, machine efficiency, service life, etc. Generally, the problems to be solved by engineers do not have a direct relationship with people. It is a pure technical work. The role of engineers is to provide people or products with technologies and processes that can serve life and work. How a product or a technology enters people's living space, how it enters the market, and how it can be better used by people are mainly completed by product designers. Product designers mainly solve the relationship between people and objects, objects and environment in product design. For example, how to operate a product, how to use it more conveniently, what kind of appearance can meet people's physiological and psychological needs, and how to save raw materials and protect the ecological environment. Product designers play a very important role in the enterprise. They endow the product with the characteristics of image, aesthetic value and social status symbol. They are the bridge connecting technology, production and consumers. What product designers pursue is the harmony and unity between people and products, products and environment. It not only meets people's requirements for material functions, but also meets people's aesthetic interests. Product designers should use the concept of marketing to continuously analyze and study the market and people's consumption concept, subdivide the consumers into different target markets according to their age, gender, income, status and other factors, and design targeted products. Designer is a profession that serves most people. The products he designs will eventually be accepted by the public, and his work achievements will ultimately be concluded by users. Therefore, he needs to not only understand the market, but also understand engineering knowledge, and make his products easy to produce reasonably

in the information age, product designers have fully participated in the development of new products. Large international enterprises have their own product design departments, such as the industrial design department of Panasonic with more than 500 employees and the design center of Philips. Some enterprises entrust independent design firms to undertake. The design department has been separated from the technical department and directly led by the company's senior management. Product designers are not only engaged in specific product development, but also engage in customer investigation together with the enterprise development department, participate in analysis and formulate new product development plans and development plans

current understanding of domestic inverter enterprises on Industrial Design: (1) domestic inverter enterprises have not fully realized the great significance of industrial design to inverter products and enterprises; (2) The domestic enterprise leaders generally have the concept and understanding of no industrial design; (3) No one has studied how to apply the principles of industrial design to the development and management of inverter products

there are many domestic frequency converter manufacturers (it is estimated that there are more than 50), but the scale and technical strength are far from that of Siemens, abb, Fuji, and other large international companies. According to statistics, the market share of domestic frequency converters is only about 10%, most of the annual sales volume hovers between 5million and 20million, and only a handful of 3 to 4 have sales volume of more than 50million. At present, the domestic inverter brands are close to the top brands, and the product performance and functions are similar. Due to its late start and weak technical and R & D strength, it basically imitates or even plagiarizes the design of foreign frequency converters, which not only has the same functions and parameters, but also has the same design appearance and defects. With the motor control technology becoming more and more mature, compared with similar foreign products, some domestic frequency converters have no obvious disadvantages in function, performance and various technical indicators. However, due to the lack of concept and understanding of product design and professional product designers, the developed products always have many defects and deficiencies, such as lack of accurate product positioning, non optimization of function and performance combination, non-compliance with users' usage habits, ugly appearance, difficult parameter setting, difficult installation, inconvenient wiring, poor maintainability, etc. In this situation, when can domestic enterprises develop products comparable to ABB's ACS800, Yaskawa G7 and Fuji G11

at present, the development of AC speed regulation technology is basically reflected in the application and gradual improvement of the existing speed regulation control theory. The ideas of vector control and direct torque control have been put forward in the 1970s and 1980s respectively. Since then, there has been no major breakthrough in the speed control theory. Companies have focused on the low-cost realization of vector control or direct torque control and solving the practical engineering application problems and product problems of products. Although some modern control theories and methods have been applied in the speed control system, such as state observer, Kalman filter, optimal control, sliding mode variable structure control and so on. At present, these theories are still in the research and experimental stage, and there is no applicable product, so there is still a long way to go from the popularization and application of commercialization. Many universities, such as Tsinghua University, Zhejiang University and Shanghai University, have made in-depth and mature research on motor control theories such as vector control, DTC and speed sensorless control. If domestic frequency converter manufacturers cooperate with them to develop high-performance vector control and even speed sensorless vector control frequency converters, there will be no major obstacles and the time will not be very long

frequency converter is an industrial product. Users do not directly care about what advanced technology it adopts. The essence of their purchase is its material and spiritual functions. They pay the corresponding amount according to the function. They are more concerned about whether its price is affordable, whether its functions are practical and convenient to use. Due to the complexity of the function and use of the frequency converter, users generally respond that the operation is difficult. How to improve the ease of use of the frequency converter and the friendliness of the man-machine interface is a difficult problem for manufacturers

the products of domestic frequency converter enterprises are concentrated in the low-end market, which is a battlefield full of price wars. It is believed that many entrepreneurs can feel that domestic products have gradually lost their cost advantages. It is reported that the price of some Japanese brand frequency converters is lower than that of domestic products. Our entrepreneurs must have a sense of crisis. The only way out for the enterprise is to grow up and continue to grow up in the right way. Attaching importance to industrial design and introducing product designers to take charge of product design and R & D is a very effective measure for the growth of China's plastic machinery industry to usher in a golden period of scientific and rapid growth

most enterprises in China are actually factories rather than enterprises. The factory system makes them pay more attention to the production process than development, marketing and market, and lack the concept of user orientation and industrial design. The products they produce lack competitiveness. Most enterprises do not have product design organizations or product designers. They just use engineers to replace product designers. Even if a few enterprises set up product design organizations, they still subordinate this organization to the technical department and do some product beautification work, similar to the situation in the 1940s and 1950s abroad. China has become an important manufacturing base in the world and has gradually developed into a "world factory". Dr. YangZhenning believes that the 21st century is a century of industrial design, and a country that does not pay attention to industrial design will become a laggard of tomorrow. It is urgent to improve the innovation ability and overall level of "made in China" with industrial design

here are some basic principles of industrial design combined with inverter products

(1) pay attention to the appearance design of products

in the process of modeling design, designers should mobilize all sensory and spiritual experiences, combine logical thinking and image thinking creatively, find out the essence of the problem, and create a new product image. The appearance should be able to maintain charm for a long time, with good texture, high recognition and consistent with the enterprise tradition. Obviously, engineers need to cultivate their own aesthetic ability and understand the aesthetic psychology of the public. Most of the frequency converters designed by domestic enterprises are in a lifeless square box shape, with rough texture, monotonous color and uncoordinated collocation, which can only bring users low-grade and shoddy images. On the contrary, many foreign frequency converters, such as Mitsubishi S500

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