Induction Motor Slot Combinations
Source
A theory of coexisting stationary and rotating slot openings is developed with the aid of ``revolving permeances,' and the magnitude and speed of the parasitic fluxes due to the slot openings and the fundamental current density wave are found. It is shown that the interaction of the fundamental flux and a parasitic flux of the same order of magnitude as the fundamental flux causes the. THe strong vibro-acoustic influence of the slot numbers combination used in squirrel-cage induction machines was experimented at the early beginning of the twentieth century. Consequently, some researchers started to look for some general rules to decrease these motor noise and vibra-tions mainly due to Maxwell air-gap magnetic forces, the first. Basically the operating supply phase will determine the number of poles.ie., for a 3-phase motor, it will have a minimum of 3-poles, 6-coils that are. 7 different slot combinations have been here swept in a few seconds of calculation only. Results show that the choice of the rotor slot number has a large influence on the noise and vibration levels of induction motors. The best slot combination is here found with Zr=24. A complete study should involve the torque harmonics.
Transactions of the American Institute of Electrical Engineers>1931>50>2>757 - 767
Abstract
Identifiers
| journal ISSN : | 0096-3860 |
| DOI | 10.1109/T-AIEE.1931.5055866 |
Induction Motor Slot Combinations
Authors
User assignment
Assignment remove confirmation
You're going to remove this assignment. Are you sure?
Kron, Gabriel
- Consulting Engineer, United Research Corp., Long Island City, N. Y.
Keywords
Induction motorsRotorsTestingCurrent densityAir gapsStator windingsAnalysis of varianceHarmonic analysisManufacturing processes
Induction motorsRotorsTestingCurrent densityAir gapsStator windingsAnalysis of varianceHarmonic analysisManufacturing processes