Research On Vibration Reduction For Dehydration Process Of Drum Washing Machine

When the drum washing machine start and run in the dehydration process, there is a strong vibration, which is due to the role of eccentric load. Drum washing machine at work, due to the role of the load makes the asymmetry distribution of the magnetic field distribution between the drive motor stator and rotor air gap, resulting in the rotor to generate unilateral magnetic pull, allowing torque pulsation occurs. This will allow washing machine drum to vibrate, and accompanied by a strong noise. For the washing machine noise and vibration reduction predecessors developed a series of mechanical damping angle of approach, but there are limitations. In recent years, with the development of signal detection techniques, motor control technology and intelligent control technology,new models of washing machines vibration methods are being developed with considerable progress.In this paper, you can know the research work in detail, which is theoretical and experimental basis for the ramp-style drum washing machine vibration detection and vibration control. The structure and the main content of this article are as follows:Chapter one introduced the drum washing machine vibration and noise generation mechanism, and then the background for the topics of practical significance, as well as a detailed exposition paper introduces the drum washing machine vibration detection and vibration control of the main technical means.Chapter two describes the permanent magnet synchronous motor vector control system, the basic method, and then introduced the drive system's main hardware groups. Finally, for the drive system control software, the main function of PE-View did a brief introduction.Chapter three first introduced the mechanism of dehydration produced by vibration and vibration testing program, and then introduced the eccentric load to determine the radial and axial position, and gives experimental verification. The determination of radial position was done by predecessor. Then introduced the application of fuzzy control to the eccentric axial loading location to determine the method and gives the simulation results. Finally the vibration of the stator current detection method, derived the formula of unilateral magnetic pull that the distribution of air gap asymmetry case, the rotor of the electromagnetic force multiplier cycle contains two components. Run-time is given after the eccentric stator current spectrum and found that there exists an obvious stator current in the two harmonic components.Chapter four describes the vibration control method since the principle and the experimental results, is proposed based on the vibration method of feedforward control.Chapter five describes the work done on the full sum, and the development of research done is discussed.