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Constant of Machine construction is a constant term which is calculated separately to a make calculation less complex. Check FAQs
Kf=Vt-IaRaNΦ
Kf - Constant of Machine Construction?Vt - Terminal Voltage?Ia - Armature Current?Ra - Armature Resistance?N - Motor Speed?Φ - Magnetic Flux?

Machine Construction Constant using Speed of Shunt DC Motor Example

With values
With units
Only example

Here is how the Machine Construction Constant using Speed of Shunt DC Motor equation looks like with Values.

Here is how the Machine Construction Constant using Speed of Shunt DC Motor equation looks like with Units.

Here is how the Machine Construction Constant using Speed of Shunt DC Motor equation looks like.

2.1756Edit=75Edit-3.7Edit2.16Edit2579.98Edit0.114Edit
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Machine Construction Constant using Speed of Shunt DC Motor Solution

Follow our step by step solution on how to calculate Machine Construction Constant using Speed of Shunt DC Motor?

FIRST Step Consider the formula
Kf=Vt-IaRaNΦ
Next Step Substitute values of Variables
Kf=75V-3.7A2.16Ω2579.98rev/min0.114Wb
Next Step Convert Units
Kf=75V-3.7A2.16Ω270.1749rad/s0.114Wb
Next Step Prepare to Evaluate
Kf=75-3.72.16270.17490.114
Next Step Evaluate
Kf=2.17558896361187
LAST Step Rounding Answer
Kf=2.1756

Machine Construction Constant using Speed of Shunt DC Motor Formula Elements

Variables
Constant of Machine Construction
Constant of Machine construction is a constant term which is calculated separately to a make calculation less complex.
Symbol: Kf
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Terminal Voltage
Terminal Voltage refers to the voltage measured at the terminals of an electrical device, such as a battery, generator, or electric motor.
Symbol: Vt
Measurement: Electric PotentialUnit: V
Note: Value can be positive or negative.
Armature Current
Armature Current DC motor is defined as the armature current developed in an electrical dc motor due to the rotation of rotor.
Symbol: Ia
Measurement: Electric CurrentUnit: A
Note: Value can be positive or negative.
Armature Resistance
The Armature Resistance is the ohmic resistance of the copper winding wires plus the brush resistance in an electrical dc motor.
Symbol: Ra
Measurement: Electric ResistanceUnit: Ω
Note: Value should be greater than 0.
Motor Speed
Motor Speed is the speed of the rotor(motor). Motor speed refers to the rate at which a motor rotates or operates. It is a measure of how fast the motor's output shaft or rotor spins.
Symbol: N
Measurement: Angular VelocityUnit: rev/min
Note: Value can be positive or negative.
Magnetic Flux
Magnetic flux (Φ) is the number of magnetic field lines passing through the magnetic core of an electrical dc motor.
Symbol: Φ
Measurement: Magnetic FluxUnit: Wb
Note: Value should be greater than 0.

Other Formulas to find Constant of Machine Construction

​Go Machine Construction Constant of Shunt DC Motor
Kf=60n||nZ
​Go Machine Construction Constant of DC Shunt Motor given Angular Speed
Kf=EbΦωs

Other formulas in Mechanical Specifications category

​Go Number of Parallel Paths of Shunt DC Motor
n||=KZn60
​Go Number of Armature Conductors of DC Shunt Motor using K
Z=60n||Kn
​Go Number of Poles of Shunt DC Motor
n=60n||KZ
​Go Machine Constant of DC Shunt Motor given Torque
K=τΦIa

How to Evaluate Machine Construction Constant using Speed of Shunt DC Motor?

Machine Construction Constant using Speed of Shunt DC Motor evaluator uses Constant of Machine Construction = (Terminal Voltage-Armature Current*Armature Resistance)/(Motor Speed*Magnetic Flux) to evaluate the Constant of Machine Construction, The Machine Construction Constant using Speed of Shunt DC Motor formula is defined as a constant based on machine construction that is required to find all the basic quality of the machine. Constant of Machine Construction is denoted by Kf symbol.

How to evaluate Machine Construction Constant using Speed of Shunt DC Motor using this online evaluator? To use this online evaluator for Machine Construction Constant using Speed of Shunt DC Motor, enter Terminal Voltage (Vt), Armature Current (Ia), Armature Resistance (Ra), Motor Speed (N) & Magnetic Flux (Φ) and hit the calculate button.

FAQs on Machine Construction Constant using Speed of Shunt DC Motor

What is the formula to find Machine Construction Constant using Speed of Shunt DC Motor?
The formula of Machine Construction Constant using Speed of Shunt DC Motor is expressed as Constant of Machine Construction = (Terminal Voltage-Armature Current*Armature Resistance)/(Motor Speed*Magnetic Flux). Here is an example- 7.532743 = (75-3.7*2.16)/(270.174873799862*0.114).
How to calculate Machine Construction Constant using Speed of Shunt DC Motor?
With Terminal Voltage (Vt), Armature Current (Ia), Armature Resistance (Ra), Motor Speed (N) & Magnetic Flux (Φ) we can find Machine Construction Constant using Speed of Shunt DC Motor using the formula - Constant of Machine Construction = (Terminal Voltage-Armature Current*Armature Resistance)/(Motor Speed*Magnetic Flux).
What are the other ways to Calculate Constant of Machine Construction?
Here are the different ways to Calculate Constant of Machine Construction-
  • Constant of Machine Construction=(60*Number of Parallel Paths)/(Number of Poles*Number of Conductors)OpenImg
  • Constant of Machine Construction=Back EMF/(Magnetic Flux*Angular Speed)OpenImg
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