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Motor Speed is the speed of the rotor(motor). Check FAQs
N=60n||EbZnΦ
N - Motor Speed?n|| - Number of Parallel Paths?Eb - Back EMF?Z - Number of Conductors?n - Number of Poles?Φ - Magnetic Flux?

Motor Speed of DC Motor Example

With values
With units
Only example

Here is how the Motor Speed of DC Motor equation looks like with Values.

Here is how the Motor Speed of DC Motor equation looks like with Units.

Here is how the Motor Speed of DC Motor equation looks like.

1289.9825Edit=606Edit24.943Edit14Edit4Edit1.187Edit
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Motor Speed of DC Motor Solution

Follow our step by step solution on how to calculate Motor Speed of DC Motor?

FIRST Step Consider the formula
N=60n||EbZnΦ
Next Step Substitute values of Variables
N=60624.943V1441.187Wb
Next Step Prepare to Evaluate
N=60624.9431441.187
Next Step Evaluate
N=135.086653026838rad/s
Next Step Convert to Output's Unit
N=1289.98251456335rev/min
LAST Step Rounding Answer
N=1289.9825rev/min

Motor Speed of DC Motor Formula Elements

Variables
Motor Speed
Motor Speed is the speed of the rotor(motor).
Symbol: N
Measurement: Angular VelocityUnit: rev/min
Note: Value can be positive or negative.
Number of Parallel Paths
The Number of Parallel Paths in a DC machine refers to the number of independent paths for current to flow in the armature winding.
Symbol: n||
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Back EMF
The Back emf opposes the current which causes it in any dc machine.
Symbol: Eb
Measurement: Electric PotentialUnit: V
Note: Value can be positive or negative.
Number of Conductors
The number of conductors is the variable we use for getting the correct number of conductors placed in the rotor of a dc motor.
Symbol: Z
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Number of Poles
Number of Poles is defined as the number of poles in an electrical machine for the flux generation.
Symbol: n
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
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 Motor Speed

​Go Motor Speed of DC Motor given Flux
N=Vs-IaRaKfΦ

Other formulas in DC Motor Characteristics category

​Go Machine Construction Constant of DC Motor
Kf=Vs-IaRaΦN
​Go Back EMF Equation of DC Motor
Eb=nΦZN60n||
​Go Supply Voltage given Electrical Efficiency of DC Motor
Vs=ωsτaIaηe
​Go Armature Current given Electrical Efficiency of DC Motor
Ia=ωsτaVsηe

How to Evaluate Motor Speed of DC Motor?

Motor Speed of DC Motor evaluator uses Motor Speed = (60*Number of Parallel Paths*Back EMF)/(Number of Conductors*Number of Poles*Magnetic Flux) to evaluate the Motor Speed, The Motor Speed of DC Motor formula is defined as the speed of the rotor of the dc motor with respect to no. of poles, parallel paths, and conductors. Motor Speed is denoted by N symbol.

How to evaluate Motor Speed of DC Motor using this online evaluator? To use this online evaluator for Motor Speed of DC Motor, enter Number of Parallel Paths (n||), Back EMF (Eb), Number of Conductors (Z), Number of Poles (n) & Magnetic Flux (Φ) and hit the calculate button.

FAQs on Motor Speed of DC Motor

What is the formula to find Motor Speed of DC Motor?
The formula of Motor Speed of DC Motor is expressed as Motor Speed = (60*Number of Parallel Paths*Back EMF)/(Number of Conductors*Number of Poles*Magnetic Flux). Here is an example- 12297.19 = (60*6*24.943)/(14*4*1.187).
How to calculate Motor Speed of DC Motor?
With Number of Parallel Paths (n||), Back EMF (Eb), Number of Conductors (Z), Number of Poles (n) & Magnetic Flux (Φ) we can find Motor Speed of DC Motor using the formula - Motor Speed = (60*Number of Parallel Paths*Back EMF)/(Number of Conductors*Number of Poles*Magnetic Flux).
What are the other ways to Calculate Motor Speed?
Here are the different ways to Calculate Motor Speed-
  • Motor Speed=(Supply Voltage-Armature Current*Armature Resistance)/(Constant of Machine Construction*Magnetic Flux)OpenImg
Can the Motor Speed of DC Motor be negative?
Yes, the Motor Speed of DC Motor, measured in Angular Velocity can be negative.
Which unit is used to measure Motor Speed of DC Motor?
Motor Speed of DC Motor is usually measured using the Revolution per Minute[rev/min] for Angular Velocity. Radian per Second[rev/min], Radian per Day[rev/min], Radian per Hour[rev/min] are the few other units in which Motor Speed of DC Motor can be measured.
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