Brushless dc motor is with the development of semiconductor electronic technology and appear new mechanical and electrical integration of the motor, it is the modern electronic technology (Including power electronics, microelectronics technology)The combination of the technology, control theory and motor. Compared with ac machine more than one hundred years of history, history of brushless dc motor (BLDCM) is only a few decades. The United States in 1955 D. Harrison and others for the first time applied to replace the mechanical brush commutation circuit with transistor's patent, this is the prototype of the brushless dc motor. In 1962, T. G。 Wilson and P. H。 Trickey proposed 'solid phase dc motor' (与固态整流直流电机)Patent, it marks the real birth of modern brushless motor. Since the early 1960 s, brushless dc motor entered the stage of application. Because of its high reliability, the brushless dc motor (BLDCM) has been applied in aerospace technology. In 1964, it was America's national aeronautics and space administration (NASA)Used for satellite attitude control, on satellite tracking and control of solar panels, pump drive, etc. In 1978, when the federal republic of Germany Mannesmann Indramat division of MAC classic brushless dc motor and drive trade fair in Hanover, officially launched, electronic commutation of brushless dc motor is really into the practical phase of the sign. International brushless dc motor has carried on the thorough research, from the development of square-wave brushless motor on the basis of development to the sine wave brushless motor is a new generation of permanent magnet synchronous motor (永磁同步电动机)。 As a new permanent magnet materials, microelectronics technology, automatic control technology and the development of power electronic technology especially high power switching devices, brushless motor got rapid progress. For more than 50 years, it gradually spread to other military equipment, industrial, civilian control system as well as in the field of household appliances, has now become the most promising motor products.
