Advanced design of the moving coil frame and its components
The design concept is to reasonably distribute the material mass under the premise of the lightest weight and the best stiffness, so that the moving coil can achieve the best dynamic characteristics.
Eliminate the influence of eddy current induction and improve the reliability of moving coil work
In the working state of the moving coil, induced eddy currents appear in the moving coil skeleton with the change of the working frequency. The existence of this inductive eddy current causes a large amount of heat to be generated in the bonding part of the moving coil. The long-term accumulation of this heat will cause the
bonding part of the moving coil to fail early and affect the working reliability and life of the moving coil and the system. For this reason, 8 cut-off grooves are processed in the relevant parts of the moving coil and insulation reinforcement is carried out, so that the eddy current induction heat is generated as little as possible, and the rigidity and strength of the moving coil are not damaged. As shown on the right.
Moving coil manufacturing process
The adhesive used in this project is a high-temperature curing high-strength epoxy adhesive imported from Japan. The curing temperature of the adhesive is 140°C. The bonding strength is particularly outstanding at high temperatures, and the peeling strength can reach 5492N/ m.
At the same time, a stainless steel mesh with a thickness of 0.5mm is used on the inner and outer layers of the winding to increase the strength of the winding. The stainless steel mesh has mechanical properties of temperature resistance and high strength, and has good adhesion with epoxy resin.
This design and material selection ensure the reliability and stability of the moving coil.
