In recent years, unmanned aerial vehicle (uav) market is booming, unmanned aerial vehicle (uav) of related industrial chain ushered in the new development opportunity. Among them, the brushless dc motor is one of the important component of the unmanned aerial vehicle (uav), its performance is directly related to the stand or fall of unmanned aerial vehicle (uav) flight performance. The rise of unmanned aerial vehicle (uav) let the original motor manufacturing enterprises engaged in other USES saw the prospects for development, market began to take this opportunity to unmanned aerial vehicle (uav) motor. In recent years, rapid development in the consumer 'unmanned aerial vehicle (uav) at the same time, also received professional unmanned aerial vehicle (uav) market is growing rapidly. Unmanned aerial vehicle (uav) from the consumer market are turning to professional market (Professional level including industrial and military level higher-end unmanned aerial vehicle (uav))。 At present, the professional unmanned aerial vehicle (uav) application scope expands, covers electricity, forest fire prevention, agricultural plant protection, a police official, fire control, monitoring, inspection, surveying and mapping and rescue, and many other fields. Professional unmanned aerial vehicle (uav) need at least 4 ~ 6 sets of brushless dc motor, used to drive rotor unmanned aerial vehicle (uav), motor drive controller is used to control speed and direction of the unmanned aerial vehicle (uav). The stability of the motor control system of uav is critical. Therefore, in recent years, with high reliability, high performance and long life of unmanned aerial vehicle (uav) for brushless dc motor market is developing rapidly. Professional level of unmanned aerial vehicle (uav) motor system to be more accurate and reliable, and it is also a unmanned aerial vehicle (uav) motor manufacturing enterprises need to work in the field of motor direction. In addition, in particular environmental conditions, such as moisture, vacuum and harmful substances, in order to improve the reliability of the system, the brushless dc motor. Among them, the military and aerospace field where the application of brushless dc motor is the first to get.
