Electromagneticforce analysis
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152 - Electromagnetic Force Analysis of Short-circuited Power Transformer Windings |
Module:FQ |
2011-07-12 |
Electromagnetic force is produced by the current on the windings of the transformer. The windings can be deformed or damaged by the powerful electromagnetic force produced when there is a short-circuit current flowing. Therefore, confirming where the various forces are acting on the windings using analyses is vital.
This note presents the use of a magnetic field analysis to obtain the Lorentz force density and electromagnetic force produced in the windings when short-circuited by changing the position of the windings to display the effects of the primary and secondary windings. |
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72 - Analysis of Attractive Force between Steel Sheets and a Magnet
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Module:ST |
2011-01-17 |
When magnetic materials, such as steel sheets, are moved towards a magnet,
they are attracted mutually. The attractive force between the magnet and
the magnetic material and between the electromagnet and the magnetic material
has been efficiently used for motors and solenoids. This note presents
the use of magnetic field analysis to evaluate the attractive force between
steel sheets and a magnet.
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62 - Attractive Force Analysis of a Solenoid Valve
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Module:DP |
2011-01-17 |
A solenoid valve is a device that opens and closes the valve by moving
a plunger using electromagnetic force. Upon considering the effect of the
fluid stress caused by opening and closing the valve, it is important that
the attractive force is proportional to the drive current, and that a constant
attractive force is obtained regardless of the position of the iron core.
This note presents the use of magnetic field analysis to obtain the attractive
force of a solenoid valve at different positions of an iron core.
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