Mechanism of action for all types of electric motors are generally the same:
• An electric current in a magnetic field will experience a force.
• If the current carrying wire is bent into a circle / loop, then both sides of the loop, ie at right angles to the magnetic field, will get a force in the opposite direction.
• pair of forces creates playlists / torque to rotate the spindle.
• These motors have multiple loops on dynamo to provide a more uniform torque and magnetic field generated by the coil arrangement called the electromagnetic field.
In understanding an electric motor, it is important to understand what is meant by the motor load. Load refers to the rotary power output / torque in accordance with the required speed. Expenses generally be categorized into three groups:
• constant torque load, is the load which the output power varies with the speed of operation, but the torque does not vary. Examples of constant torque loads are conveyors, rotary kilns, and constant displacement pump.
• Load with variable torque, is the torque load that varies with the speed of operation. Examples of variable torque loads are centrifugal pumps and fans (torque varies as the square of the speed).
• Constant power load, a load torque change with demand and inversely proportional to the speed. An example for a constant power load tools are machines.
ELECTRIC MOTOR can be divided into two groups based on the use of electric current. the direct current electric motor and alternating current electric motors
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