In modern society, various types of machinery have different sources of power, including gasoline engines, diesel engines, electric motors, etc. Among them, electric motors are one of the most important power sources. The development of electric motors cannot be separated from the exploration of predecessors. The following are important stages in the development of electric motors:
1. Theoretical preparation and exploration:
In 1820, Danish physicist Oster discovered the "magnetic effect of electric current", laying the foundation for the development of electromagnetism. In 1821, British physicist Faraday created the first model of an experimental motor and proved that electricity could work and move, marking the beginning of the electrical age for humanity.
2. Development of DC motors:
In 1870, Graham of Belgium invented the DC generator, which was designed very similarly to the DC motor. This Graham type motor was mass-produced and its efficiency was significantly improved. The development of DC motors has gone through stages of using permanent magnets as magnetic fields, using electromagnets as magnetic poles, and changing excitation methods.
3. The rise of AC motors:
In 1889, Russian engineer Durev Dubolowski invented the squirrel cage three-phase electric motor, which was the first three-phase AC motor that could be used, marking the stage of development of electric motors that could enter industrial applications.
4. Commercialization and industrialization of electric motor technology:
In 1873, Belgian engineer Graham invented high-power electric motors, which began to be widely used in industrial production. In 1886, Frank Julian Sprague invented the first DC electric motor that could maintain a relatively constant speed under variable loads, greatly improving power distribution in the grid.
5. Commercialization and Industrialization of Electric Motor Technology:
In 1873, Graham from Belgium invented high-power electric motors, which began to be widely used in industrial production. In 1886, Frank Julian Sprague invented the first DC electric motor that could maintain a relatively constant speed under variable loads, greatly improving power distribution in the grid. 6. Modernization of Electric Motors: In 1978, Rexroth, a German company, launched the MAC permanent magnet AC servo motor and drive system, marking the emergence of a new generation of AC servo technology and the modernization of motor technology entering the right track
The above is the development history of electric motors.
