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Solenoids

Solenoids

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field for a solenoid is the vector sum of the magnetic field due to its individual turns. For an ideal solenoid, the magnetic field inside is almost uniform and parallel to the solenoid axis, while the magnetic field outside the solenoid is nearly zero.
Each turn in a solenoid can be approximated as a circular current carrying coil that generates a dipole moment. The...

Magnetic Field of a Solenoid

Magnetic Field of a Solenoid

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...

Overcurrent Relays

Overcurrent Relays

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MOSFET

MOSFET

The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
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Related Experiment Video

Updated: Jun 16, 2026

Design of a Cyclic Pressure Bioreactor for the Ex Vivo Study of Aortic Heart Valves

Design of a Cyclic Pressure Bioreactor for the Ex Vivo Study of Aortic Heart Valves

Published on: August 23, 2011

Note: High temperature pulsed solenoid valve.

Wei Shen¹, Mark Sulkes

¹Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.

The Review of Scientific Instruments

|February 2, 2010

Summary

This summary is machine-generated.

We developed a reliable high-temperature solenoid valve for over 400°C operation. Enhanced solenoid force and a modified seal tip improve sealing and long-term reliability for demanding applications.

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Measurement of Outgassing Rates of Steels

Measurement of Outgassing Rates of Steels

Published on: December 13, 2016

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Last Updated: Jun 16, 2026

Design of a Cyclic Pressure Bioreactor for the Ex Vivo Study of Aortic Heart Valves

Design of a Cyclic Pressure Bioreactor for the Ex Vivo Study of Aortic Heart Valves

Published on: August 23, 2011

Measurement of Outgassing Rates of Steels

Measurement of Outgassing Rates of Steels

Published on: December 13, 2016

Area of Science:

Engineering
Materials Science

Background:

High-temperature solenoid valves are crucial for precise fluid control in extreme environments.
Existing designs face challenges with sealing integrity and long-term reliability at elevated temperatures.

Purpose of the Study:

To develop a high-temperature solenoid valve with enhanced sealing and reliability.
To improve upon existing designs for operation up to 400°C.

Main Methods:

Utilized a solenoid with higher lifting force for plunger actuation.
Thermally isolated the solenoid from the heated orifice region.
Modified the polished seal at the needle tip to achieve superior sealing.

Main Results:

Achieved reliable long-term operation at temperatures up to 400°C.
Demonstrated superior sealing and reliability due to increased solenoid force.
Observed a tradeoff between sealing performance and attainable gas pulse durations.

Conclusions:

The new solenoid valve design offers improved sealing and reliability for high-temperature applications.
A simple modification to the needle tip seal enhances sealing performance.
The design is cost-effective with simple machining requirements.