# How do you find the voltage rating of a DC motor?

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A simple model for a DC motor is V=R∗i+e, where V is the terminal voltage, R is the motor resistance, and e is the back-emf voltage.

## How do you find the voltage of a motor?

V = Eb + Ia x Ra

1. V is the terminal voltage.
2. Eb is the induced back e.m.f.
3. Ia is the armature current.
4. Ra is the armature resistance.

## What is the rated voltage of DC motor?

Typical DC motors may operate on as few as 1.5 Volts or up to 100 Volts or more. Roboticists often use motors that operate on 6, 12, or 24 volts because most robots are battery powered, and batteries are typically available with these values. Operating Current.

## How is DC motor rated?

DC Motors are typically rated in terms of : Rated voltage: The operating voltage on the input side of the motor. … Rated speed: Speed (in revolutions per minute, denoted by r/min or rpm) for which the motor is designed to operate for continuous operation.

## How long can a DC motor run continuously?

If you are looking for a motor with a long life expectancy, consider a brushless motor. Brushed motor life is limited by the brush type and can attain 1,000 to 3,000 hours on average, while brushless motors can attain tens of thousands of hours on average, as there are no brushes to wear.

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## What happens if you Underpower a DC motor?

Running a DC motor below nominal voltage generally will not cause any problems with the motor. If anything, the motor will last longer because it won’t be subject to the same level of stress (from heat, friction, and general wear) as it is when running at the full nominal voltage.

## What is starting resistance of DC motor?

Hence, armature current at the moment of starting can be given as Ia = E / Ra. In practical DC machines, armature resistance is basically very low, generally about 0.5 Ω.

## Is washing machine motor AC or DC?

washing machine motor run on DC.