Abstract :The better governing speed characteristic is kept and the mechanical touch between brushes and commutator is removed as well in brushless DC Motors. Brushless DC motor is rapidly developing new motor in the recently, and it widely used in industry, agriculture and in the army. This paper intends to make a better on the Design of Brushless DC motor .The DC motor without coal brushless is in a new style, with higher work efficiency. Less wear and lower noise. This paper presents the method of selecting phase, slot number and winding connection type and introduces the laws that should be obey in the design of brushless DC motor. Also based on introducing the structure of a light power DC motor, a 120w light power DC motor is design according to the theory. Not only make a lot of detail analyzed about the Hall position sensor in this paper .but also the bruless DC’s controls and the driving-methods for brushless DC.
Keywords:
DC motor ;the design of magnetic circuit.
