Synchronous speed, frequency, and poles of the induction motor are related by the formula: η sync = (120. f e) / P η sync = Synchronous speed f e = Frequency of the system. The wire-size can be calculated in several different ways (the area of an old winding or a slot of a other shape or the cross section of all wires, etc. A 480-V, 60 Hz, 50-hp, three phase induction motor is drawing 60 A at 0.85 PF lagging. The stator copper losses are 2 kW, and the rotor copper losses are 700 W. Induction motor using RMxprt. The model created by RMxprt will then be used as an input for EMpulse as a basis for performing more detailed analysis and for increasing the accuracy of the performance pre-dictions. RMxprt uses a combination of analytical and magnetic circuit equations to predict the performance of this three-phase induction motor. Induction Motor Rewinding Calculation February 06, 2017 Induction Motor Winding Data Analyzer By German Torres Garcia. The three-phase induction motor is the easiest motor of this type to understand so these notes start with that type. The single-phase induction motor is more subtle and less efficient. It is discussed later. The magnetic field in the air gap from the voltage applied to the stator: The stator has three sets of windings.

So you just burned your motor or you want to rewind your motor for more power/torque, but are confused as to how to wind the motor. Just enter the no of poles ( the no of stator arms) and the no of magnets in this calculator and it will provide a winding schematic.

Induction Motor Rewinding Calculation

The no of poles/stator arms of the motor are always in the multiples of 3 and hence the motor has 3 phases. Each phase is winded separately. If you mark any stator arm as phase one, then the next stator arm of the same phase can be obtained by adding 3 to the first stator arm.

Induction Motor Winding Calculation

So stator arms 1, 4,7,10…ect belong to one phase. Similarly stator arms 2,5,8,11…etc belong to phase two and stator arms 3,6,9,12. belong to phase three.