| The single-phase series motor has the advantage of convenience to use, high speed, light weight, small volume, big start torque, strong overload capacity and so on. It has been widely used in our daily life, especially applied in most of household appliances and power tools. A single-phase series motor applied in household food mixer is designed in this thesis. This thesis establishes the two-dimensional finite element model of the motor and simulates the motor performance especially the commutation performance.The basic characteristics, structural features and operating principles of the single-phase series motor have been analysed. According to the design characteristics and requirements of the single phase series motor, this thesis determines the main dimensions, electromagnetic load, magnetic parameters and the brush of the motor. In addition, this thesis lists the motor electromagnetic design program, completed the preliminary design of the motor.This thesis establishes the two-dimensional finite element model of the single-phase series motor and analyzes the performance of the single-phase series motor, including the mechanical properties, steady magnetic field and the characteristics of the motor at the time of no-load and on load of the single-phase series motor. According to these simulation we draw a series of results and analyze them combined with motor theory validated in order to verify the feasibility of the design.This thesis analyzes the commutation process and mechanism of the single-phase series motor and studies the influence factors of the commutation situation in the single-phase series motor and the method to improve the commutation situation of the single-phase series motor. This thesis sets the brush offset angle of the two-dimensional finite element model and simulates the commutation current situation when the brush offset angle is 0 and not 0. Through comparison and analysis, we validate that the method of adjusting the brush position to improve the commutation situation in the single-phase series motor is effective. At the same time, we study the performance of the motor under different brush offset angle These work provides some reference value for the future studies of the single-phase series motor. |
