PMPO versus RMS

Root mean square (also known as RMS) is a measurement used to acquire the output values of the Power Outputs. It is also known as the most accurate way of garnering these measurements. The RMS is also known as the quadratic mean. In this case, it is used to measure amplifier power. It is used in conjunction with the electric efficiency of an electronic amplifier, and is a way to measure the ratio of mean (or average) output power to mean (or average) output power.

Torque Induction Motor

The input power to a three-phase induction motor is given by

Output power can be found by subtracting the losses from the input power

Losses

• Stator Copper Loss. The stator resistive losses 

Slip Induction Motor

Induction motors

These motors are probably the simplest and most rugged of all electric motors. They consist of two basic electrical assemblies: the wound stator and the rotor assembly.
The rotor consists of laminated, cylindrical iron cores with slots for receiving the conductors. On early motors, the conductors were copper bars with ends welded to copper rings known as end rings. Viewed from the end, the rotor assembly resembles a squirrel cage, hence the name squirrel- cage motor is used to refer to induction motors. In modern induction motors, the most common type of rotor has cast-aluminum conductors and short-circuiting end rings. The rotor turns when the moving magnetic field induces a current in the shorted conductors. The speed at which the magnetic field rotates is the synchronous speed of the motor and is determined by the number of poles in the stator and the frequency of the power supply.