The majority of motors in service worldwide are of the 3-phase induction type, earning these machines the 'workhorse of industry' reputation. Unlike most other machine types there is no upper or lower size limit, although in the smallest sizes the single-phase induction machine is more appropriate.

Although rugged in construction, they are capable of very smooth, quiet operation with a wider speed range than permanent magnet machines. The induction machine is often the preferred choice for applications with high speed, high temperature or high torque specifications.

When ruggedness and simplicity are desired, the ability to run directly off mains supply without a controller can make the induction machine the only sensible choice. For low cost, variable speed applications, the wide availability of off-the-shelf controllers keeps the induction machine attractive even when compared with reluctance types.

EMX has designed induction machines for automotive and aerospace applications requiring maximum material utilisation to keep volume low, while meeting tough performance criteria. Our design method employs advanced optimisation techniques which, when coupled with finite-element analysis, allows our engineers to identify the key parameters for a successful design.