What is a Solenoid and Solenoid Magnetic Field
What is a Solenoid?
It ranges in size from less than one quarter of an inch to more than 15 inches in diameter.
Solenoid Magnetic Field:
- Faraday’s law
- Ampere’s law
Generated Voltage = E = -N dɵ/dt
E = Induced Voltage
N = Number of Turns
ɵ = BA = where B = Magnetic flux, A = Area of Coil.
BL = µNI
As it concentrates magnetic lines of flux, therefore, its core is made of ferromagnetic materials. When electric current passes through the coil, a magnetic flux induces within the core material. Some magnetic flux appears outside the coil (near ends of the core) and a small amount of flux flows off across the coil.
Core form of solenoid:
Basic Terms Related to Solenoids and Actuators.
- Iron ceases to carry any increase in flux.
- The point where iron begins to saturate.
BL = µNI or
B = µ (N/L) I
B = µnL
Nominal Coil Resistance and Current
Resistance = V2/P
Current = P/V
Types of solenoids:
- Linear Solenoid
- Rotary Solenoid
1. Linear solenoids:
Application and Uses of linear solenoids:
It is also used where the required angular motion is very small and DC stepper motor cannot do the job.
Available rotary solenoids provide moments of two positions self-restoring (0° to 90° and 90° to 0°) Three Position self restoring (0° to +45° or 0° to -45°) and two position self latching.
It is similar to the linear solenoid but the difference is that the core is mounted in the center of the large flat disk.
Application of rotary solenoids:
Application of solenoids in Industry:
- Locking mechanism
- Automotive application
- Medical application
- Industrial use
- Relay switching Control
- Air condition system
- Agricultural system
A few words:
While involving in the process of solenoid design and manufacturing, it is among the best actuation device in terms of size, cost and simple installation as well as it provides a possible solution for customer in a short time. From the point of uses and applications, it is quite clear that it has an important role in the field of medical technology, Security and other common industries in the modern world.
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