FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Back EMF for DC Shunt Generator Formula

Fx Copy

LaTeX Copy

Back EMF is developed when current flows through the armature, it generates a magnetic field that interacts with the field produced by the field winding to produce a torque. Check FAQs

E b = K f \cdot Φ \cdot ω s

E_b - Back EMF?K_f - Machine Constant?Φ - Magnetic Flux?ω_s - Angular Speed?

Back EMF for DC Shunt Generator Example

With values

With units

Only example

Here is how the Back EMF for DC Shunt Generator equation looks like with Values.

Here is how the Back EMF for DC Shunt Generator equation looks like with Units.

Here is how the Back EMF for DC Shunt Generator equation looks like.

11.3097 = 2 \cdot 0.2 \cdot 270

11.3097V = 2 \cdot 0.2Wb \cdot 270rev/min

11.3097 = 2 \cdot 0.2 \cdot 270

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Engineering » Category

Electrical » Category

Machine » fx Back EMF for DC Shunt Generator

Back EMF for DC Shunt Generator Solution

Follow our step by step solution on how to calculate Back EMF for DC Shunt Generator?

FIRST Step Consider the formula

E b = K f \cdot Φ \cdot ω s

Next Step Substitute values of Variables

∴

E b = 2 \cdot 0.2Wb \cdot 270rev/min

Next Step Convert Units

∴

E b = 2 \cdot 0.2Wb \cdot 28.2743rad/s

Next Step Prepare to Evaluate

∴

E b = 2 \cdot 0.2 \cdot 28.2743

Next Step Evaluate

∴

E b = 11.3097335523473V

LAST Step Rounding Answer

∴

E b = 11.3097V

Back EMF for DC Shunt Generator Formula Elements

Variables

Back EMF

Back EMF is developed when current flows through the armature, it generates a magnetic field that interacts with the field produced by the field winding to produce a torque.

Symbol: E_b

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Back EMF

Machine Constant

Machine Constant refers to the parameter which usually has a constant value for a particular type of dc machine.

Symbol: K_f

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Machine Constant

Magnetic Flux

Magnetic flux (Φ) is the number of magnetic field lines passing through the magnetic core of an electrical dc motor. It is a measurement of the total magnetic field which passes through a given area.

Symbol: Φ

Measurement: Magnetic FluxUnit: Wb

Note: Value should be greater than 0.

Formulas to find Magnetic Flux

Angular Speed

Angular speed is the rate of rotation about an axis, measuring how the angle changes with time. It is measured in radian/sec.

Symbol: ω_s

Measurement: Angular VelocityUnit: rev/min

Note: Value should be greater than 0.

Formulas to find Angular Speed

Other formulas in Voltage and EMF category

Go Terminal Voltage for DC Shunt Generator

V t = V a - I a \cdot R a

How to Evaluate Back EMF for DC Shunt Generator?

Back EMF for DC Shunt Generator evaluator uses Back EMF = Machine Constant*Magnetic Flux*Angular Speed to evaluate the Back EMF, The Back EMF for DC Shunt Generator is defined as the electromotive force developed when current flows through the armature, it generates a magnetic field that interacts with the field produced by the field winding to produce a torque in a DC Shunt Generator. Back EMF is denoted by E_b symbol.

How to evaluate Back EMF for DC Shunt Generator using this online evaluator? To use this online evaluator for Back EMF for DC Shunt Generator, enter Machine Constant (K_f), Magnetic Flux (Φ) & Angular Speed (ω_s) and hit the calculate button.

FAQs on Back EMF for DC Shunt Generator

What is the formula to find Back EMF for DC Shunt Generator?

The formula of Back EMF for DC Shunt Generator is expressed as Back EMF = Machine Constant*Magnetic Flux*Angular Speed. Here is an example- 11.30973 = 2*0.2*28.2743338808683.

How to calculate Back EMF for DC Shunt Generator?

With Machine Constant (K_f), Magnetic Flux (Φ) & Angular Speed (ω_s) we can find Back EMF for DC Shunt Generator using the formula - Back EMF = Machine Constant*Magnetic Flux*Angular Speed.

Can the Back EMF for DC Shunt Generator be negative?

Yes, the Back EMF for DC Shunt Generator, measured in Electric Potential can be negative.

Which unit is used to measure Back EMF for DC Shunt Generator?

Back EMF for DC Shunt Generator is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Back EMF for DC Shunt Generator can be measured.

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit