IP Library › Granted Patent US 7,456,714
Granted Patent B2
US 7,456,714 · App. 11/545,652 · Granted Nov 25, 2008

Magnetostriction aided switching

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Quick Facts
Patent No.
US 7,456,714
App. No.
11/545,652
Granted
Nov 25, 2008
Kind
B2
Abstract

A method for reducing a temperature rise of a magnetic material is provided. The method includes applying force to the magnetic material to reduce a dimensional change of the magnetic material during a first part of an operation cycle, such as due to magnetostriction. The force is removed from the magnetic material during a second part of an operation cycle, allowing magnetostrictive dimensional changes to occur.

Claims (14)

1. A method for reducing a temperature rise of a magnetic material comprising:

applying force to the magnetic material to reduce a dimensional change of the magnetic material during a first part of an operation cycle;

removing force from the magnetic material during a second part of an operation cycle; and

wherein applying the force to the magnetic material to reduce the dimensional change of the magnetic material during the first part of the operation cycle further comprises:

determining a magnetic flux and a magnetic field density of the magnetic material; and

applying the force to the magnetic material to reduce the dimensional change of the magnetic material during the first part of the operation cycle based on the magnetic flux and the magnetic field density.

2. The method of claim 1 wherein determining the magnetic flux and the magnetic field density comprises calculating the magnetic flux and the magnetic field density based on a winding current magnitude and magnetic material dimensional characteristics.

3. The method of claim 1 wherein determining the magnetic flux comprises measuring the magnetic flux using a magnetic flux probe.

4. The method of claim 1 wherein determining the magnetic field density comprises measuring the magnetic field density using a magnetic field density probe.

5. A method for reducing a temperature rise of a magnetic material comprising:

applying force to the magnetic material to reduce a dimensional change of the magnetic material during a first part of an operation cycle;

removing force from the magnetic material during a second part of an operation cycle, wherein removing the force from the magnetic material during the second part of the operation cycle comprises:

determining a magnetic flux and a magnetic field density of the magnetic material; and

wherein removing the force to the magnetic material to allow the dimensional change of the magnetic material during the second part of the operation cycle based on the magnetic flux and the magnetic field density.