Customers

Publications

Site map

   A new approach to field modelling

Applications>

Sample problems 

Long solenoid inductance

Problem type:
Axisymmetric problem of DC magnetics.

Geometry:

R₁ = 30 mm, R₂ = 35 mm.

Given:
Current in the conductor i = 10 A;
Number of turns N = 100,
(number of turns per unit length n = N/l = 200 m^-1);

Problem:
Calculate inductance of the long solenoid.

Solution:
Inductance of the long solenoid can be obtained from the equation:
L = N ² · μ₀ A / l = N n · μ₀ A,
where A is a cross-section area of the core (m²).

To calculate the inductance in QuickField you should divide magnetic flux by the source current.

L = N · Φ / i

Results:

Download simulation files.

References:

• John Bird, "Electrical circuit theory and technology", p.77. ISBN-13: 978 0 7506 8139 1.