Research On Control System Of DC Brushless Motor For Drum Washing Machine

With the development of science and technology and the improvement of manufacturing industry,rare earth permanent magnet brushless DC motor has been developed and applied.DC brushless motor with its mechanical structure is simple,high efficiency,low efficiency and high reliability,is becoming the preferred model of washing machines,and DC brushless motor is the biggest feature of the past,the motor used to change the mechanical phase,The use of electronic commutation,to overcome the traditional motor mechanical friction caused by a series of problems,improve.the motor life.Based on the analysis of the mechanical properties of the brushless DC motor and the corresponding mathematical model,this paper designs a safe and reliable drive system which fully meets the requirements of the application function of the washing machine on the market.Firstly,the research on the drum type mechanical structure washing machine is taken as the research object,and the research status of the development and control system of brushless DC motor for drum washing machine is introduced.The algorithm of fuzzy adaptive tuning PID is used to control the period and duty cycle of the PWM wave supplied by the three-phase full-bridge circuit.The common PID is used as the control object to compensate the period of the PWM output PWM And the duty cycle,the entire system to form a double closed-loop control of the motor speed.Secondly,the brushless motor and its control system in the MATLAB/Simulink in the establishment of system simulation model,and in accordance with the actual control system requirements to select the appropriate parameters to verify the brushless DC motor operating status is good and the torque output stability performance.Finally,the DSP chip is used as the control core,and the hardware design of the brushless motor control system and the drum washing machine man-machine interaction device is carried out.Based on the hardware of the system,the corresponding software is compiled and debugged,and the corresponding program statement is optimized to meet the relevant application function requirements,And then experiment to verify the feasibility of the study design and drum washing machine control system reliability.