RFQMagnetic Circuit
Creating a successful speaker requires proper magnetic circuit design, which directly impacts sensitivities and cost. Finite Element Analysis (FEA) tools can be used to find the best structure for arranging magnets and low-carbon steels to save time and costs. This approach verifies all required parameters before making the real samples.
At Kingstate, we have ample experience in building simulation models via COMSOL Multiphysics, which are not limited to a round shape due to 2D axial symmetry.
Calculations are analyzed by the force factor (BL) and the distributions of magnetic flux density, which help identify areas that can be cut away without losing performance in projects that require space-saving.
To ensure that the magnetic flux is concentrated and flows in the correct direction, the voice coil must be placed in the perfect rest position.
This is crucial in reducing distortion, which is influenced by the symmetry and asymmetry of the force factor (BL) when the voice coil moves forward and backward.
Optimizing the rest position of the voice coil and the magnetic circuit structure can lead to a low distortion of the speaker. High sensitivities and controlled distortion rely on high BL and the symmetry of BL versus coil displacement, which can all be verified in advance by building simulation models. Next, let's move on to discussing driver study.
