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Consider an application’s purpose and which current it uses to select the appropriate type of motor. An application’s specifications such as voltage, current, torque, and velocity will determine which motor is most appropriate so be sure to pay attention to its requirements.

## 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 you size a motor?

Motor running current and voltage values should be measured and recorded on a routine basis as part of a preventive maintenance program. Use this formula to estimate motor horsepower: Horsepower (hp) = Voltage x Amerage x % EFF x power factor x 1.73/746.

## How do you choose torque for a motor?

To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.

## How do you choose RPM for a motor?

How to Calculate Motor RPM. To calculate RPM for an AC induction motor, you multiply the frequency in Hertz (Hz) by 60 — for the number of seconds in a minute — by two for the negative and positive pulses in a cycle. You then divide by the number of poles the motor has: (Hz x 60 x 2) / number of poles = no-load RPM.

## What are the different sizes of electric motors?

Motors come in different horsepower categories, including: fractional motors (1/20th HP to 1 HP), integral horsepower motors (1 HP to 400 HP), and large motors (100 HP to 50,000 HP). RPM ratings include 3600 RPM (2 pole), 1800 RPM (4 pole), and 1200 RPM (6 pole).

## How do you determine motor capacity?

Calculation of motor capacity

- 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)
- 1) Set the suitable SPEED.
- 2) Voltage calculation.
- 3) Torque measurement.
- 4) Set the speed torque.

## How do I choose a motor and gearbox?

Basics of Gearbox Selection

- Service Factor. Before sizing an application, the customer should determine the service factor. …
- Ambient Temperature and Environment. …
- Shock Load or Type of Load. …
- Output Style or Mechanism. …
- Output Shaft or Hollow Bore Size. …
- Housing Styles.

## 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.

## What are the different types of motors?

Types of Electric Motors

- AC Brushless Motors. AC brushless motors are some of the most popular in motion control. …
- DC Brushed Motors. In a DC brushed motor, brush orientation on the stator determines current flow. …
- DC Brushless Motors. …
- Direct Drive. …
- Linear Motors. …
- Servo Motors. …
- Stepper Motors.

## What points are considered while selecting HP rating of a motor?

Like one mentioned above, a number of other factors and design features like weather conditions, stringent system conditions, abnormal surroundings, hazardous area, duty cycle, motor efficiency, etc. should be considered while deciding the rating and subsequently drawing out the technical specifications of the motor.

## How do you select an HP 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.