How Do I Know What Type Of Electric Motor I Have?

Do I have an AC or DC motor?

Look for the stator core construction and rotor. If there is no commutator, then it is a AC motor. If there is a commutator and brushes, it may be either a DC motor or an AC commutator motor (Universal motor).

How can you identify a motor without nameplate?

Use a strobe tachometer to determine motor RPM and then set up a generic motor in the database for that RPM. If loading cannot be provided by the operator use the acquired data and RPM to approximate loading. You can view the power factor for a value around 88 to 92 to approximate full load.

What are the types of electric motors?

There are two obvious types of electric motors as determined by input voltage: AC (Alternating Current) or DC (Direct Current). While AC motors use alternating current to power a series of wound coils, DC motors use direct current to power either carbon brushes or electrical commutation.

How do I know what pole My motor is?

To determine the number of poles, you can read the data plate directly or calculate it from the RPM stated on the data plate or you can count the coils and divide by 3 (poles per phase) or by 6 (pairs of poles per phase).

How do you identify a DC motor?

How to Find Cheap DC Motors

1. Find some old CD players or computer CD drives.
2. Find some old computer cooling fans.
3. Salvage larger industrial size DC motors from home items such as a clothes dryer, treadmill, and car starters.
4. Go to goodwill or garage sales to find electronic toys.
5. Find some old VCR players.

What is a motor code?

Codes are defined in MG 1-10.37. 2 by a series of letters from A to V. Generally, the farther the code letter from A, the higher the inrush current per hp. A replacement motor with a “higher” code may require different upstream electrical equipment, such as motor starters.

How do I know if my engine has a shaded pole?

How do I identify a shaded pole motor? This motor can be identified by using an auxiliary winding which is made up of a copper ring called a shading coil.

How do you calculate the horsepower of an electric motor?

For a single phase motor, you can find out the horsepower using this equation: HP = volts x full load amps x percent efficiency x power factor / 746.

What are the three types of motor?

An electrical motor is mainly classified into three types.

• AC Motors.
• DC Motors.
• Special Motors.

How many type of motor do we have?

Basic motors have been classified into three distinct types: AC motor, DC motor, and specialized motors.

What is the most common type of electric motor?

Three- Phase Motor
Because of high efficiency and low cost, the three phase AC motor is the most commonly used motor in industrial applications.

What is sizing of motor?

Motor Sizing Motor sizing refers to the process of picking the correct motor for a given load. It sis important to size a motor correctly because: a. If a motor is too small for an application it may not have sufficient torque to start the load and run it up to the correct speed.

What are the different sizes of electric motors?

Standard horsepower ratings for electrical motors – 1 to 4000 hp are indicated below: 1, 1.5, 2, 3, 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 75, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 3000, 3500, 4000.

What size hp motor do I need?

The rule of thumb is based on weight alone, and says you should have between 40 and 25 pounds of weight for each horsepower. For example, a 5,000-pound boat could have an engine with between 125 and 200 horsepower.

How do you tell if a motor is 2 pole or 4 pole?

On an induction motor, the number of poles determines the speed given the frequency of the power. For a 2 pole motor, at 60hz, it will spin 60 times a second, or 3600rpm. For a 4 pole motor, the speed is halved – 1800 rpm, 6 pole, 1200 rpm and so on.

How do I know if I have a 4 pole motor?

RE: How to tell how many poles a motor has.
Forgive me mentioning, the straightforward way to tell is to look at nameplate speed and figure it form there. 60hz motor at just below 3600rpm is 2-pole, at jut below 1800rpm 4 pole, just below 1200rpm6 pole.

What RPM is an 8 pole motor?

900 rpm
To satisfy consumers’ desires for quieter motors, manufacturers have developed eight-pole motors. These operate at 900 rpm (unloaded) and approximately 800 rpm under load. They are being used in applications where customers expect quieter operation, such as room air conditioners and outdoor heat pump applications.

What devices have a DC motor?

Any electric or battery Clock, all battery appliances, shavers, Electric Drills, most wrist watches these days. .. . Walk round your house, try to count how many electric motors there in your house. Some new ceiling fans use BLDC motors. Fans found inside computers, induction cook tops etc also usually use DC motors.

What are the types of DC motor?

There are 4 main types of DC motors:

• Permanent Magnet DC Motors. The permanent magnet motor uses a permanent magnet to create field flux.
• Series DC Motors. In a series DC motor, the field is wound with a few turns of a large wire carrying the full armature current.
• Shunt DC Motors.
• Compound DC Motors.

How do you measure a DC motor?

Key criteria for selecting a DC motor includes first finding out what voltage is readily available for the application and what physical size the motor needs to be. Speed and torque can then be considered once these first two parameters are determined. 1. Voltage availability is a critical element in motor selection.