Voice coil of a speaker - QuickField simulation example
This is an example of the speaker magnetic system simulation performed with QuickField software.
How does magnetic flux density vary along a loudspeaker voice coil’s height?
Answer Typical applications Geometry
Given
Task
Solution
Results
Magnetic flux density distribution in the air gap along the voice coil height:
Engineering question
Solve an axisymmetric DC-magnetic model and plot the air-gap flux density B(z) along the voice-coil height.
loudspeaker voice coils, dynamic speaker motors, electroacoustic transducers
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Simulation problem
Problem Type
Axisymmetric problem of DC magnetics.
The material of the magnet is ferrite with coercive force Hc = 500 kA/m;
Coil material - copper;
Core material - soft magnetic steel:
Calculate the magnetic flux density profile in the air gap along the voice coil height.
We create an axisymmetrical QuickField DC Magnetic problem with specified geometry and data, and make a plot of flux density versus coordinate B(z) in the air gap.
Flux density color map of the speaker magnetic system:
Video
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