A solenoid similar to the figure below, has a core made of caststeel (refer to the figure on the next slide). It has a cross-sectional area of 4cm2 and a mean length of 20cm. The coil has 100turns, and the coil current is 3.2A.Find the following:a)magnetomotive force, mmfb)magnetic field intensity, Hc)flux density, B (with graph) PrimarywindingSecondarywindingNg turnsNp turmsPrimarycurrentMagneticFlux,Secondary! curentPrimaryvotageSeconderyvoltageTransformerCore 1.5Sheet SteelCast Steel0.5Cast Iron0.0.1500250050010002000Magnetic Field Intensity (H, A-t/m)FIGURE 12-4Saturation curves for steel.Flux Density (B, T)

Answered: Image /qna-images/answer/5372a98a-e690-412b-84e6-275229cf2254.jpg

Answered: 1.5 Sheet Steel Cast Steel 0.5 Cast…

1.5 Sheet Steel Cast Steel 0.5 Cast Iron 0. 0. 500 1000 1500 2000 2500 Magnetic Field Intensity (H, A-t/m) FIGURE 12-4 Saturation curves for steel. Flux Density (B, T)

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter3: Magnetic Starters

Section: Chapter Questions

Problem 30SQ

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Concept explainers

Solenoids

A solenoid is a common term for a telephone coil used as an electromagnet. It also refers to any device that uses a solenoid to convert electrical energy into mechanical energy. The device generates a magnetic field from an electric field and uses the magnetic field to produce precise motion. Solenoid valves are often used to change power, such as in-car transmitters or valves, such as in the fuel system.

Question

A solenoid similar to the figure below, has a core made of cast
steel (refer to the figure on the next slide). It has a cross-sectional area of 4cm2 and a mean length of 20cm. The coil has 100turns, and the coil current is 3.2A.

Find the following:
a)magnetomotive force, mmf
b)magnetic field intensity, H
c)flux density, B (with graph)

Primary
winding
Secondary
winding
Ng turns
Np turms
Primary
current
Magnetic
Flux,
Secondary
! curent
Primary
votage
Secondery
voltage
Transformer
Core

1.5
Sheet Steel
Cast Steel
0.5
Cast Iron
0.
0.
1500
2500
500
1000
2000
Magnetic Field Intensity (H, A-t/m)
FIGURE 12-4
Saturation curves for steel.
Flux Density (B, T)

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