Deflecting torque of PMMC instrument Calculator

✖Number of Turns of Magnetic Coil specifies the number of turns of the coil of magnetic coil under testing.ⓘ Number of Turns of Magnetic Coil [N]			+10% -10%
✖Flux Density of Coil gives the flux density in the air gap.ⓘ Flux Density of Coil [B]			+10% -10%
✖Length of scale gives the length of vertical scale.ⓘ Length [l]			+10% -10%
✖Width of scale gives the width of the horizontal scale.ⓘ Width [d]			+10% -10%
✖Current in Coil gives the current through moving coil.ⓘ Current in Coil [i]			+10% -10%

✖Deflecting Torque is the force applied to a measuring instrument, such as a meter or galvanometer, causing it to rotate. It's proportional to the current passing through the device's coil.ⓘ Deflecting torque of PMMC instrument [T_d]

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Formula

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Deflecting torque of PMMC instrument

Formula

`"T"_{"d"} = "N"*"B"*"l"*"d"*"i"`

Example

`"0.00108N*m"="100"*"0.450Wb/m²"*"0.04m"*"0.03m"*"0.02A"`

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Deflecting torque of PMMC instrument Solution

STEP 0: Pre-Calculation Summary

Formula Used

Deflecting Torque = Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil
T_d = N*B*l*d*i
This formula uses 6 Variables

Variables Used

Deflecting Torque - (Measured in Newton Meter) - Deflecting Torque is the force applied to a measuring instrument, such as a meter or galvanometer, causing it to rotate. It's proportional to the current passing through the device's coil.
Number of Turns of Magnetic Coil - Number of Turns of Magnetic Coil specifies the number of turns of the coil of magnetic coil under testing.
Flux Density of Coil - (Measured in Tesla) - Flux Density of Coil gives the flux density in the air gap.
Length - (Measured in Meter) - Length of scale gives the length of vertical scale.
Width - (Measured in Meter) - Width of scale gives the width of the horizontal scale.
Current in Coil - (Measured in Ampere) - Current in Coil gives the current through moving coil.

STEP 1: Convert Input(s) to Base Unit

Number of Turns of Magnetic Coil: 100 --> No Conversion Required
Flux Density of Coil: 0.45 Weber per Square Meter --> 0.45 Tesla (Check conversion here)
Length: 0.04 Meter --> 0.04 Meter No Conversion Required
Width: 0.03 Meter --> 0.03 Meter No Conversion Required
Current in Coil: 0.02 Ampere --> 0.02 Ampere No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T_d = N*B*l*d*i --> 100*0.45*0.04*0.03*0.02

Evaluating ... ...

T_d = 0.00108

STEP 3: Convert Result to Output's Unit

0.00108 Newton Meter --> No Conversion Required

FINAL ANSWER

0.00108 Newton Meter <-- Deflecting Torque

(Calculation completed in 00.006 seconds)

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Home » Engineering » Electronics and Instrumentation » Measuring Instrument Circuits » Permanent Magnet Moving Coil » Deflecting torque of PMMC instrument

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Vellore Institute of Technology (VIT), Vellore

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< 9 Permanent Magnet Moving Coil Calculators

Angle of deflection of PMMC

Go Angle of Deflection in Magnetic Coil = (Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil)/Spring Constant

Deflecting torque of PMMC instrument

Go Deflecting Torque = Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil

Rsh of PMMC based Ammeter

Go Resistance of Shunt = (Full Scale Deflection Current*Internal Resistance of Meter Movement)/(Current-Full Scale Deflection Current)

Resistance at switch position 'n' for multi range Ammeter

Go Resistance at nth Switch Position = (Resistance at Switch Position 1+Internal Resistance of Meter Movement)/Nth Multiplying Factor

Nth resistance in multi-range voltmeter

Go Nth Multiplier Resistance = (Nth Multiplying Factor-(n-1)th Multiplying Factor)*Internal Resistance of Meter Movement

Rs of PMMC based voltmeter

Go Multiplier Resistance = (Voltage/Full Scale Deflection Current)-Internal Resistance of Meter Movement

Nth resistance in multi-range Ammeter

Go Nth Multiplier Resistance = Internal Resistance of Meter Movement/(Nth Multiplying Factor-1)

m of PMMC based voltmeter

Go Multiplying Power = 1+(Multiplier Resistance/Internal Resistance of Meter Movement)

m of PMMC based Ammeter

Go Multiplying Power = (1+Internal Resistance of Meter Movement)/Resistance of Shunt

Deflecting torque of PMMC instrument Formula

Deflecting Torque = Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil
T_d = N*B*l*d*i

What is PMMC?

PMMC stands for Permanent Magnet Moving Coil. The instruments which use the permanent magnet for creating the stationary magnetic field between which the coil moves are known as a permanent magnet moving coil or PMMC instruments.

How does torque in PMMC work?

When a current flows through the coil, it generates a magnetic field that is proportional to the current in the case of an ammeter. The deflecting torque is produced by the electromagnetic action of the current in the coil and the magnetic field. When the torques are balanced, the moving coil will stop and its angular deflection represents the amount of electrical current to be measured against a fixed reference, called a scale.

How to Calculate Deflecting torque of PMMC instrument?

Deflecting torque of PMMC instrument calculator uses Deflecting Torque = Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil to calculate the Deflecting Torque, The Deflecting torque of PMMC instrument is produced by the electromagnetic action of the current in the coil and the magnetic field. Deflecting Torque is denoted by T_d symbol.

How to calculate Deflecting torque of PMMC instrument using this online calculator? To use this online calculator for Deflecting torque of PMMC instrument, enter Number of Turns of Magnetic Coil (N), Flux Density of Coil (B), Length (l), Width (d) & Current in Coil (i) and hit the calculate button. Here is how the Deflecting torque of PMMC instrument calculation can be explained with given input values -> 0.000108 = 100*0.45*0.04*0.03*0.02.

FAQ

What is Deflecting torque of PMMC instrument?

The Deflecting torque of PMMC instrument is produced by the electromagnetic action of the current in the coil and the magnetic field and is represented as T_d = N*B*l*d*i or Deflecting Torque = Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil. Number of Turns of Magnetic Coil specifies the number of turns of the coil of magnetic coil under testing, Flux Density of Coil gives the flux density in the air gap, Length of scale gives the length of vertical scale, Width of scale gives the width of the horizontal scale & Current in Coil gives the current through moving coil.

How to calculate Deflecting torque of PMMC instrument?

The Deflecting torque of PMMC instrument is produced by the electromagnetic action of the current in the coil and the magnetic field is calculated using Deflecting Torque = Number of Turns of Magnetic Coil*Flux Density of Coil*Length*Width*Current in Coil. To calculate Deflecting torque of PMMC instrument, you need Number of Turns of Magnetic Coil (N), Flux Density of Coil (B), Length (l), Width (d) & Current in Coil (i). With our tool, you need to enter the respective value for Number of Turns of Magnetic Coil, Flux Density of Coil, Length, Width & Current in Coil 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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