# Frequent question: What size electric motor do I need?

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General rule of thumb: you need at least 2 lbs. of thrust for every 100 lbs. of fully-loaded boat weight (people and gear included).

## How do I know what size electric motor I need?

Divide the motor speed by the required speed and round down to get a starting gear ratio. Then divide the required torque by the gear ratio to find the newly required torque. This will help you narrow the choices down to a few select motors.

## How do I choose an electric motor?

To determine the technical specifications, it will be necessary to determine the power, torque and speed of the motor. In order to determine the size, you must know how much space the motor will take up and how it is mounted (i.e.how it will be fixed in the system).

## How do you size a motor?

The quickest method to closely estimate motor horsepower is to use a digital clamp meter to measure current and voltage to the motor, and then perform a simple calculation. Use this formula to estimate motor horsepower. Horsepower(hp)= Voltage x Amperage x % EFF x power factor x 1.73/746.

## How do you determine motor capacity?

Calculation of motor capacity

1. n = i x n1. n : Motor speed (min–1) n1 : Speed of gear output shaft or pulley etc. attached to it. i : Reduction ratio of gear head (e.g. i = 20 for 1/20)
2. 1) Set the suitable SPEED.
3. 2) Voltage calculation.
4. 3) Torque measurement.
5. 4) Set the speed torque.
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## How long can an electric motor run continuously?

In the range of six months to a year, you should expect the motor to run continuously for the life of the brushes. I thought the motor was too small to have its brushes changed by an electrician.

## How do I choose a brushless motor?

The physical size of a particular brushless motor is usually indicated by a number that looks like this – ’22-05′. The first number, 22, indicates how wide the motor is whilst the second number, 05, indicates the hight. Usually, these are written on the motor casing themselves to show you how wide and high they are.

## How do I choose an AC motor?

There are a few basic criteria for selecting an AC motor. These involve common variables such as the operating speed and load torque, in addition to the power supply voltage and frequency. First of all, calculate the operating speed. Induction and reversible motor speeds cannot be adjusted.

## How much weight can a 1 hp motor lift?

The constant 1 horsepower equals 550 foot-pounds per second. In other words, 1 horsepower is the amount of work required to move a load of 550 pounds over 1 foot, in 1 second.

## How do I choose an agitator motor?

Things you need to know is the Batch Volume ( V ), Type of Agitator, Agitator to vessel dia ratio ( D/T ), Scale of Agitation, Fluid Density ( rho ) and Fluid viscosity ( myu ). Agitator Dia ( D ) = D/T x Teq. Bulk Velocity ( Vc ) = 6 x Scale of Agitation ft/min. = 0.03048 x Scale of Agitation m/sec.

## How do you determine the maximum load of a motor?

If you know the out put specifications of the motor & rated speed its easy calculate the Load that you can put on it. Power = 2*PI*N*. T/4500. where as torque is equal to Load multiplied by distance at which Load is applied.

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## What is motor GD Square?

GD^2 Value is the ABILITY for motor or prime mover to start or move in a given time with out any problem. Higher the GD^2 value LESSER will be the Acceleration or PICK-UP of ROTATIONAL SPEED, and Vise-Versa. In the case of Motor – the current drawn will be high for longer duration, if GD^2 is High and Vise-Versa.