The so-called electrical age refers to the second technological revolution represented by the motor, which made the emerging electric energy as a main energy form dominate the social and economic life and launched a historical period that no one had thought of before. The outstanding advantages of electric energy are: first, it is an industrial power that is easy to transmit; Secondly, it is also an extremely effective and reliable information carrier. Therefore, the power era is mainly reflected in two aspects: power transmission and information transmission. Related to power transmission, there are also large generators, high-voltage transmission networks, various motors and lighting lamps. Associated with information transmission, telegraph, telephone and radio communication appeared. These great inventions have brought human life into a brighter and better new era.
The invention and application of electricity, current, electromagnetic induction, electromagnetic waves and the success of power transmission are major breakthroughs in replacing steam power with electricity, making electricity quickly become a widely used energy source and power.
19 At the end of the 20th century, electrification reached a climax in the world, and the United States and Germany quickly entered the ranks of world industrial powers because of the earliest electrification. The wide application of electric power technology first promoted the rapid development of electric power industry and electrical equipment industry. The electric power industry with power generation, transmission and distribution as the main body came into being and developed. Electrical equipment manufacturing industries such as generators, motors, transformers, circuit breakers, wires and cables have also risen rapidly, which has also promoted the development of engineering technologies such as materials, processes and control. The development of electric power technology has transformed many traditional industries and brought a series of new technologies.
Communication is information transmission. The most basic means of information transmission is language. With the development of human society, it is urgent to transmit information over a long distance. Since18th century, people have begun to explore new ways of communication. With the wide application of electric power and the success of long-distance transmission, cable telegraph, telephone, radio communication and television have developed one after another. The real driving force for the emergence and development of various communication technologies is the needs of society. Since then, mankind has really entered the electric power era.