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Differential inductance is relevant when a low-frequency electromagnetic system includes magnets, nonlinear magnetic materials, and moving parts. These models present examples of computing the differential inductance and using these within simplified lumped models. To learn more about ... 詳細を見る

Uncertainty Quantification is used to study the effect of manufacturing variation on the performance of 2D Solidly Mounted Resonator (2D SMR). This tutorial shows how resonant frequency is effected by thickness variations of the piezoelectric layer and the Bragg reflector layers. The ... 詳細を見る

Gas cells have several applications in the design of scientific instruments. A gas cell is used to define a high-pressure region within the instrument's main vacuum system. For example, in this application, note we are designing a high-pressure region 100 mm long, with an operating ... 詳細を見る

This tutorial demonstrates how to compute the response of an ultrasonic car parking sensor transducer coupling Pressure Acoustics, Frequency Domain, Solid Mechanics, and Piezoelectric Materials. The far-field radiation pattern of the transducer is then used as a source for a Ray ... 詳細を見る

The tonpilz (sound mushroom) piezoelectric transducer is a transducer for relatively low frequency, high power sound emission. The transducer consists of piezoceramic rings stacked between massive ends and pre-stressed by a central bolt. The tail and head mass lower the resonance ... 詳細を見る

This example investigates the electrical and thermal characteristics of a plasma DC arc created in a point-to-plane configuration. The discharge is assumed to be in local thermodynamic equilibrium. The plasma is considered a conductive fluid medium and is modeled using a ... 詳細を見る

This tutorial model solves for an inductively coupled plasma reactor in a mixture of SF6/argon. The model computes the fluid flow and gas heating. Important aspects and strategies for modeling electronegative discharges are discussed. 詳細を見る

This is a busbar configuration with an AC analysis. The configuration is similar to the introductory tutorial in the book Introduction to COMSOL Multiphysics. However, two conductors are added to represent a more realistic case of magnetic fields surrounding the busbar. The results ... 詳細を見る

この検証モデルと関連する解説書では, 電磁力計算の精度を調査します. 様々な手法を用いて, 剛体にかかる力とトルクの合計を求め, 解析モデルと比較します. フィレット, 高度なメッシュ分割, 外部フォースプローブサーフェスを用いることで, 精度は大幅に向上します. 境界要素法（BEM）と有限要素法（FEM）を複数のメッシュサイズで比較します. パラメトリックスイープを用いて, BEMとFEMの両方のメッシュ収束を調査します. 詳細を見る

A magnetic brake consists of a permanent magnet, which induces currents in a rotating copper disk. The resulting eddy currents interact with the magnetic flux to produce Lorentz forces and subsequently a braking torque. The disk angular velocity is computed using Simulink®. 詳細を見る