Regarding the issue of the presence of both the paranoid coil and the incentive coil simultaneously

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I want to conduct a simulation of a transducer. The overall structure is a cylinder. The coil part consists of an inner bias coil and an outer excitation coil. The bias coil provides a constant bias magnetic field, while the excitation coil provides an alternating magnetic field. How should I set up the bias coil to be energized by direct current, and the excitation coil to be energized by alternating current of a certain frequency?


1 Reply Last Post 2025/10/11 11:00 GMT-4
Robert Koslover Certified Consultant

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Posted: 7 hours ago 2025/10/11 11:00 GMT-4
Updated: 7 hours ago 2025/10/11 11:03 GMT-4
  1. If your problem is strictly linear, you can model the two cases separately and add the fields and other results of interest. You can model the bias coil in a static model. and the excitation coil in a frequency-domain model.
  2. if your problem is nonlinear, then model the whole configuration in the time domain, applying a constant current to the bias coil and a (time domain) sinusoidal current to the other coil.
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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
1. If your problem is *strictly linear*, you can model the two cases separately and add the fields and other results of interest. You can model the bias coil in a static model. and the excitation coil in a frequency-domain model. 2. if your problem is *nonlinear*, then model the whole configuration in the time domain, applying a constant current to the bias coil and a (time domain) sinusoidal current to the other coil.

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