Numerical Prediction of Electromagnetic Vibration and Noise of Permanent-Magnet Direct Current Commutator Motors With Rotor Eccentricities and Glue Effects

Numerical models are developed to predict the electromagnetic vibration and noise of permanent-magnet direct current (PMDC) commutator motors when both rotor eccentricities and glue effects are involved. Finite-element method (FEM) and boundary-element method (BEM) are combined to analyze the electromagnetic, mechanical, and acoustical characteristics of the studied motor. By using the finite-element method, an electromagnetic field considered as the electromagnetic vibration and noise sources of the motor is calculated in the two-dimensional air-gap region. Based on the electromagnetic field, the radial and tangential magnetic forces exciting the structure of the motor are then obtained in the time and frequency domains. Consequently, the transient responses (accelerations) of the motor are simulated by applying the magnetic forces on the three-dimensional dynamic-structure finite-element model of the motor. Furthermore, the sound pressures radiated from the vibrating surface of the motor can be obtained by using the boundary-element method in the frequency domain. The numerical results agree well with those measured in the laboratory. The present research reveals that the static eccentricity distorts the distribution of the magnetic forces in the spatial domain. And the distorted magnetic forces mainly exaggerate the accelerations of the motor for the frequency range which is lower than the natural frequencies of the motor. In addition, the epoxide-resin glue between the permanent magnets and the stator can influence the vibrational and the acoustical characteristics of the motor.

[1]  Joseph C. S. Lai,et al.  Noise of Polyphase Electric Motors , 2005 .

[2]  Kay Hameyer,et al.  Acoustic Simulation of a Special Switched Reluctance Drive by Means of Field–Circuit Coupling and Multiphysics Simulation , 2010, IEEE Transactions on Industrial Electronics.

[3]  Joseph C. S. Lai,et al.  Sound power radiated from an inverter driven induction motor II: Numerical analysis , 2004 .

[4]  T Ishikawa,et al.  Design of Magnet Arrangement in Interior Permanent Magnet Synchronous Motor by Response Surface Methodology in Consideration of Torque and Vibration , 2011, IEEE Transactions on Magnetics.

[5]  Dimitri Torregrossa,et al.  Prediction of Acoustic Noise and Torque Pulsation in PM Synchronous Machines With Static Eccentricity and Partial Demagnetization Using Field Reconstruction Method , 2012, IEEE Transactions on Industrial Electronics.

[6]  Mircea Popescu,et al.  Unbalanced Magnetic Pull Due to Asymmetry and Low-Level Static Rotor Eccentricity in Fractional-Slot Brushless Permanent-Magnet Motors With Surface-Magnet and Consequent-Pole Rotors , 2010, IEEE Transactions on Magnetics.

[7]  Yoong-Ho Jung,et al.  Comparison of magnetic forces for IPM and SPM motor with rotor eccentricity , 2001 .

[8]  Martin Furlan,et al.  A coupled electromagnetic‐mechanical‐acoustic model of a DC electric motor , 2003 .

[9]  Myung-Ryul Choi,et al.  Effect of Pole and Slot Combination on Noise and Vibration in Permanent Magnet Synchronous Motor , 2010, IEEE Transactions on Magnetics.

[10]  A Miraoui,et al.  Multiphysics Finite-Element Modeling for Vibration and Acoustic Analysis of Permanent Magnet Synchronous Machine , 2011, IEEE Transactions on Energy Conversion.

[11]  K. Hameyer,et al.  Comparison of 2-D and 3-D Coupled Electromagnetic and Structure-Dynamic Simulation of Electrical Machines , 2008, IEEE Transactions on Magnetics.

[12]  Joseph C. S. Lai,et al.  VIBRATION ANALYSIS OF AN INDUCTION MOTOR , 1999 .

[13]  Taeyong Yoon Magnetically induced vibration in a permanent-magnet brushless DC motor with symmetric pole-slot configuration , 2005, IEEE Transactions on Magnetics.

[14]  Jian Li,et al.  Investigation into Reduction of Vibration and Acoustic Noise in Switched Reluctance Motors in Radial Force Excitation and Frame Transfer Function Aspects , 2009, IEEE Transactions on Magnetics.

[15]  Abdellatif Miraoui,et al.  Fast Computation of Electromagnetic Vibrations in Electrical Machines via Field Reconstruction Method and Knowledge of Mechanical Impulse Response , 2012, IEEE Transactions on Industrial Electronics.

[16]  Kay Hameyer,et al.  Simulation of acoustic radiation of an AC servo drive , 2010 .

[17]  K. Hameyer,et al.  Structure-Dynamic Analysis of an Induction Machine Depending on Stator–Housing Coupling , 2008, IEEE Transactions on Industry Applications.

[18]  Renyuan Tang,et al.  Electromagnetic and mechanical characterizations of noise and vibration in permanent magnet synchronous machines , 2006, IEEE Transactions on Magnetics.

[19]  U. Kim,et al.  Effects of magnetically induced vibration force in brushless permanent-magnet motors , 2005, IEEE Transactions on Magnetics.

[20]  Zhenyu Huang,et al.  Two-Dimensional Field Analysis on Electromagnetic Vibration-and-Noise Sources in Permanent-Magnet Direct Current Commutator Motors , 2011, IEEE Transactions on Magnetics.

[21]  S.L. Ho,et al.  Analysis and Solution on Squeak Noise of Small Permanent-Magnet DC Brush Motors in Variable Speed Applications , 2009, IEEE Transactions on Magnetics.

[22]  Michel Hecquet,et al.  Multiphysics Modeling: Electro-Vibro-Acoustics and Heat Transfer of PWM-Fed Induction Machines , 2010, IEEE Transactions on Industrial Electronics.

[23]  W. Soedel Vibrations of shells and plates , 1981 .

[24]  D. Howe,et al.  Influence of design parameters on the starting torque of a single-phase PM brushless DC motor , 2000 .

[25]  David J. Ewins,et al.  Modal Testing: Theory, Practice, And Application , 2000 .