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Rated Motor Torque Formula

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Rated Motor Torque is the maximum continuous torque that the motor produces at rated RPM when working normally and without overheating. Check FAQs

T r = (\frac{P \cdot 4500}{2 \cdot π \cdot N})

T_r - Rated Motor Torque?P - Power?N - Speed of Agitator?π - Archimedes' constant?

Rated Motor Torque Example

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With units

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Here is how the Rated Motor Torque equation looks like with Values.

Here is how the Rated Motor Torque equation looks like with Units.

Here is how the Rated Motor Torque equation looks like.

2.2E+6 = (\frac{0.25 \cdot 4500}{2 \cdot 3.1416 \cdot 575})

2.2E+6N*mm = (\frac{0.25hp \cdot 4500}{2 \cdot 3.1416 \cdot 575rev/min})

2.2E+6 = (\frac{0.25 \cdot 4500}{2 \cdot 3.1416 \cdot 575})

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Rated Motor Torque Solution

Follow our step by step solution on how to calculate Rated Motor Torque?

FIRST Step Consider the formula

T r = (\frac{P \cdot 4500}{2 \cdot π \cdot N})

Next Step Substitute values of Variables

∴

T r = (\frac{0.25hp \cdot 4500}{2 \cdot π \cdot 575rev/min})

Next Step Substitute values of Constants

∴

T r = (\frac{0.25hp \cdot 4500}{2 \cdot 3.1416 \cdot 575rev/min})

Next Step Convert Units

∴

T r = (\frac{186.425W \cdot 4500}{2 \cdot 3.1416 \cdot 60.2139rad/s})

Next Step Prepare to Evaluate

∴

T r = (\frac{186.425 \cdot 4500}{2 \cdot 3.1416 \cdot 60.2139})

Next Step Evaluate

∴

T r = 2217.38068399384N*m

Next Step Convert to Output's Unit

∴

T r = 2217380.68399384N*mm

LAST Step Rounding Answer

∴

T r = 2.2E+6N*mm

Rated Motor Torque Formula Elements

Variables

Constants

Rated Motor Torque

Rated Motor Torque is the maximum continuous torque that the motor produces at rated RPM when working normally and without overheating.

Symbol: T_r

Measurement: TorqueUnit: N*mm

Note: Value should be greater than 0.

Formulas to find Rated Motor Torque

Power

Power is the amount of energy transferred or converted per unit time.

Symbol: P

Measurement: PowerUnit: hp

Note: Value should be greater than 0.

Formulas to find Power

Speed of Agitator

Speed of Agitator is the rate of rotation of the drum or blades of a truck mixer or other device used for agitation of mixed concrete.

Symbol: N

Measurement: Angular VelocityUnit: rev/min

Note: Value can be positive or negative.

Formulas to find Speed of Agitator

Archimedes' constant

Archimedes' constant is a mathematical constant that represents the ratio of the circumference of a circle to its diameter.

Symbol: π

Value: 3.14159265358979323846264338327950288

Other formulas in Design of Agitation System Components category

Go Maximum Torque for Hollow Shaft

Tm hollowshaft = ((\frac{π}{16}) \cdot ({d o}^{3}) \cdot (f s) \cdot (1 - k^{2}))

Go Maximum Torque for Solid Shaft

Tm solidshaft = ((\frac{π}{16}) \cdot (d^{3}) \cdot (f s))

Go Force for Design of Shaft Based on Pure Bending

F m = \frac{T m}{0.75 \cdot h m}

Go Maximum Bending Moment subject to Shaft

M m = l \cdot F m

How to Evaluate Rated Motor Torque?

Rated Motor Torque evaluator uses Rated Motor Torque = ((Power*4500)/(2*pi*Speed of Agitator)) to evaluate the Rated Motor Torque, Rated Motor Torque is the maximum continuous torque that the motor produces at rated RPM when working normally and without overheating. Rated Motor Torque is denoted by T_r symbol.

How to evaluate Rated Motor Torque using this online evaluator? To use this online evaluator for Rated Motor Torque, enter Power (P) & Speed of Agitator (N) and hit the calculate button.

FAQs on Rated Motor Torque

What is the formula to find Rated Motor Torque?

The formula of Rated Motor Torque is expressed as Rated Motor Torque = ((Power*4500)/(2*pi*Speed of Agitator)). Here is an example- 2.2E+9 = ((186.424968*4500)/(2*pi*60.2138591907381)).

How to calculate Rated Motor Torque?

With Power (P) & Speed of Agitator (N) we can find Rated Motor Torque using the formula - Rated Motor Torque = ((Power*4500)/(2*pi*Speed of Agitator)). This formula also uses Archimedes' constant .

Can the Rated Motor Torque be negative?

No, the Rated Motor Torque, measured in Torque cannot be negative.

Which unit is used to measure Rated Motor Torque?

Rated Motor Torque is usually measured using the Newton Millimeter[N*mm] for Torque. Newton Meter[N*mm], Newton Centimeter[N*mm], Kilonewton Meter[N*mm] are the few other units in which Rated Motor Torque can be measured.

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