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 Oct 11, 2025, 11:00 a.m. EDT
Robert Koslover Certified Consultant

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Posted: 18 hours ago Oct 11, 2025, 11:00 a.m. EDT
Updated: 18 hours ago Oct 11, 2025, 11:03 a.m. EDT
  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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