# Your question: How do you find the torque constant of a DC motor?

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The Torque Constant defines the torque-current relationship of a motor and is in Nm/amp. The motor and torque constants are related by the formula Km = Kt(trap)/sqrt(R), where R is the phase-to-phase resistance of the winding.

## What is torque constant of a DC motor?

The torque constant, kT, is specific to motor’s design, including its magnetic strength, number of wire turns, and armature length. The slope of the motor’s torque-current curve is determined by the torque constant. The back EMF constant, kE, represents the relationship between the motor’s back EMF and its speed.

## What is the value of torque constant?

The SI units for the torque constant are newton metres per ampere (N·m/A). Since 1 N·m = 1 J, and 1 A = 1 C/s, then 1 N·m/A = 1 J·s/C = 1 V·s (same units as back EMF constant).

## How much weight can a 12V DC motor lift?

Weight: 100 gm(Approx.) RPM: 100 Operating Voltage: 12V DC Gearbox: Attached Plastic (spur)Gearbox Shaft diameter: 6mm Shaft Length: 21 mm Torque: 1.2 Kg-cm. No-load current = 60 mA(Max) Load current = 300 mA(Max).

## What is the torque constant of a motor?

The Torque Constant defines the torque-current relationship of a motor and is in Nm/amp. The motor and torque constants are related by the formula Km = Kt(trap)/sqrt(R), where R is the phase-to-phase resistance of the winding.

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## What is motor time constant?

The motor thermal time constant is an indicator of the heat capacity of a motor’s windings and outer case; a measure of to what degree a motor stores internal heat. … It is the time required for a given motor to reach 63.2% of its maximum rated speed in a no-load condition.

## How do you find time constant in electricity?

The transient response time to the current that flows to the armature of a motor to which a power supply voltage is applied. It is expressed by this formula: Electrical time constant = Armature inductance/Armature resistance.

## How does a DC motor rotate?

The rotation of the DC motor is accomplished by the force which is developed on a current-carrying conductor in a magnetic field. The current-carrying conductor is connected to the shaft which is able to rotate relative to the stationary body of the DC motor.

## What is mechanical time constant?

The mechanical time constant represents the amount of time for an unloaded motor to rise to 63.2% of its final velocity after application of a command voltage.