Coil Span of DC Motor Solution

STEP 0: Pre-Calculation Summary
Formula Used
Coil Span Factor = Number of Commutator Segments/Number of Poles
Kc = nc/P
This formula uses 3 Variables
Variables Used
Coil Span Factor - Coil Span Factor is defined as the peripheral distance between two sides of a coil, measured in terms of the number of armature slots between them. lt is also known as coil pitch.
Number of Commutator Segments - Number of Commutator Segments is the count of cylindrical assembly of insulated segments that are mounted on the shaft of the machine.
Number of Poles - Number of Poles refers to the total count of poles in an electrical machine for the flux generation.
STEP 1: Convert Input(s) to Base Unit
Number of Commutator Segments: 72 --> No Conversion Required
Number of Poles: 9 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Kc = nc/P --> 72/9
Evaluating ... ...
Kc = 8
STEP 3: Convert Result to Output's Unit
8 --> No Conversion Required
FINAL ANSWER
8 <-- Coil Span Factor
(Calculation completed in 00.004 seconds)

Credits

Created by Prahalad Singh
Jaipur Engineering College and Research Centre (JECRC), Jaipur
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Vishwakarma Government Engineering College (VGEC), Ahmedabad
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16 DC Machine Characterstics Calculators

Mechanical Efficiency given Induced Voltage and Armature Current
Go Mechanical Efficiency = (Electrical Efficiency*Output Voltage*Armature Current)/(Angular Speed*Torque)
Electrical Efficiency of DC Machine
Go Electrical Efficiency = (Mechanical Efficiency*Angular Speed*Torque)/(Output Voltage*Armature Current)
Design Constant of DC Machine
Go Machine Constant = (Number of Conductors*Number of Poles)/(2*pi*Number of Parallel Paths)
Angular Speed of DC Machine using Kf
Go Angular Speed = Armature Voltage/(Machine Constant*Magnetic Flux*Armature Current)
Armature Induced Voltage of DC Machine given Kf
Go Armature Voltage = Machine Constant*Armature Current*Magnetic Flux*Angular Speed
Back EMF of DC Generator
Go Back EMF = Output Voltage-(Armature Current*Armature Resistance)
Magnetic Flux of DC Machine given Torque
Go Magnetic Flux = Torque/(Machine Constant*Armature Current)
EMF Generated in DC Machine with Lap Winding
Go EMF = (Rotor Speed*Number of Conductors*Flux per Pole)/60
Torque generated in DC Machine
Go Torque = Machine Constant*Magnetic Flux*Armature Current
Coil Span of DC Motor
Go Coil Span Factor = Number of Commutator Segments/Number of Poles
Front Pitch for DC Machine
Go Front Pitch = ((2*Number of Slots)/Number of Poles)-1
Back Pitch for DC Machine
Go Back Pitch = ((2*Number of Slots)/Number of Poles)+1
Input Power of DC Motor
Go Input Power = Supply Voltage*Armature Current
Pole Pitch in DC Generator
Go Pole Pitch = Number of Slots/Number of Poles
Back Pitch for DC Machine given Coil Span
Go Back Pitch = Coil Span*Coil Span Factor
Output Power of DC Machine
Go Output Power = Angular Speed*Torque

Coil Span of DC Motor Formula

Coil Span Factor = Number of Commutator Segments/Number of Poles
Kc = nc/P

What is the main difference between the field current and armature current?

Field Current - Current flows in Field Winding or stationary winding of Motor or generator is called field current. Armature Current - Current Flows in Armature Winding or rotating Winding of Motor or generator is called Armature Current.

How to Calculate Coil Span of DC Motor?

Coil Span of DC Motor calculator uses Coil Span Factor = Number of Commutator Segments/Number of Poles to calculate the Coil Span Factor, The Coil Span of DC Motor formula is defined as the ratio between number of segments and the number of poles. It is denoted as Yc. Coil Span Factor is denoted by Kc symbol.

How to calculate Coil Span of DC Motor using this online calculator? To use this online calculator for Coil Span of DC Motor, enter Number of Commutator Segments (nc) & Number of Poles (P) and hit the calculate button. Here is how the Coil Span of DC Motor calculation can be explained with given input values -> 8 = 72/9.

FAQ

What is Coil Span of DC Motor?
The Coil Span of DC Motor formula is defined as the ratio between number of segments and the number of poles. It is denoted as Yc and is represented as Kc = nc/P or Coil Span Factor = Number of Commutator Segments/Number of Poles. Number of Commutator Segments is the count of cylindrical assembly of insulated segments that are mounted on the shaft of the machine & Number of Poles refers to the total count of poles in an electrical machine for the flux generation.
How to calculate Coil Span of DC Motor?
The Coil Span of DC Motor formula is defined as the ratio between number of segments and the number of poles. It is denoted as Yc is calculated using Coil Span Factor = Number of Commutator Segments/Number of Poles. To calculate Coil Span of DC Motor, you need Number of Commutator Segments (nc) & Number of Poles (P). With our tool, you need to enter the respective value for Number of Commutator Segments & Number of Poles and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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