Optimization Research of Air Gap Flux and Table Magnetic Flux Leakage in Electrodynamic Vibration Generator

Air gap magnetic flux and magnetic flux leakage on the table are two important performance indi-* cators of the electrodynamic vibration generator. It’s required that the magnetic flux leakage should be as small as possible and air gap magnetic flux should be as large as possible. At present, the general method of increasing the air gap magnetic flux is to increase the ampere-turns of the excitation coil, but the magnetic flux leakage will increase synchronously. The magnetic flux leakage can be reduced by adding a degaussing coil, but it is inconvenient in the design, manufacture and use, and even generates larger stray magnetic fields in some locations. According to the use experience, appropriately reducing the ampere-turns ratio of upper and lower excitation coil can effectively reduce the magnetic flux leakage. Aiming at this phenomenon, it’s simulated that the influence of different upper and lower excitation ampere-turns ratio on air gap flux and magnetic flux leakage when the when the number of ampere-turns remains unchanged. In this paper, con-sidering the air gap magnetic field and the surface magnetic flux leakage, a new method of balanc-ing the air gap flux and the surface leakage is established.