Research And Design On Wireless Networking Control System For Brushless DC Motor

Brushless DC motor (BLDC) is a simple structure with high efficiency which is easy to adjustand maintain; motor brush is instead by electronic commutator brush and fatal flaw of nose, sparksand interference is overcame which may affect motor’s life. DC motor and AC motor advantagesare set together in BLDC, which is paid more and more attention and wildly used in industrialproduction and daily life.Nowadays hardware system and speed control algorithm for motor control single motor controlare research focuses, while few researchers take motor group as the object of the research andcontrol them together. Part of the research involves the study of the motor group, but the methodsthey use are also wired control, which cause great difficulties in the case of more motor or harshenvironment unsuitable for wiring. Aiming at these problems and deficiencies, this paper proposes awireless networking control program for motor group, whose major part is wireless communicationsupplemented wired communication. Motor control link uses only wireless communication whilethe trunk uses wired control to transfer data. Because of cabling links being reduced, the systemgets rid of the shackles of the "line", and equipment costs, maintenance costs and artificial carecosts will be all reduced, at the end the competitiveness of products will be increased. After beingoptimized, this solution can be widely used in smart home, intelligent buildings, and industrialcontrol.The system uses a three-tier structure using the program, the top client for motor control, themiddle layer of a wireless data transceiver module and the bottom for the motor control system. Thetop and the middle layer is a single cable communication; in order to extend the communicationdistance as much as possible, RS232communication is changed into RS485communication, whilethe middle and the bottom layer communicate in wireless data transmission. The client is motormonitor, instruction transmission and real time parameter display platform, using MFC technologydevelopment, which can change and detect real-time parameters of any motor in the group. Wirelessdata transmission module takes wireless transceiver chip CC1101and PIC18F45K20chip as thecores, which can complete the wireless data transmission and reception between the client andmotor controllers. Motor controller uses dsPIC33FJ32MC204as the main control MCU, which cancommunicate wirelessly with the wireless communication module and receive client controlinstruction for the motor parameters detecting to upload or change the operation of the motorparameters, and whose speed control uses fuzzy PID control algorithm. This algorithm is acombination of fuzzy algorithm’s and the classic PID algorithm’s advantages, which can cope with nonlinear, strong coupling, multiple interference environment well in the brushless DC motorcontrol system.Finally the joint debugging of the whole system was carried out and the pre-design was partlymodified and improved. Debugging results show that: the system achieved the expected designrequirements which can complete wireless networking control of brushless DC motors successfullyand realize related functions. In order to further improve the design and improve the performance ofthe system, the direction of future research and suggestions are improved the end of the paper.