Description of basic electric motor types in medium voltage drive applications. Basic motor theory. Comparison of different motor designs. Strengths and weaknesses of each solution.
Insulation materials in electric machines Insulation material plays key role in the construction of electric machines. It is essential for the functionality of the machine by providing dielectric insulation of live parts. Moreover, the long term stability of the insulation material is crucial for long lifetime of the machine. In Read more…
Variable Speed Motors – Which type suits the best? Electric variable speed drive system consists as minimum of a VFD and an electric motor. So the question is: Which motor type suits the best for variable speed control? As usual, the answer depends on multiple factors. Among those factors belong Read more…
Torque-Speed characteristic of induction machine This post aims to explain the famous torque-speed characteristics of asynchronous (induction) motor. We try to make it simple and understandable. First we thought to put without mathematics into the title. Well, we might write 2-3 formulas, but keep it as simple as possible. Promised! Read more…
How to diagnose bearing issues Bearings are key mechanical components of rotating machines and motors are obviously no exception. Bearing failures make a considerable portion of overall motor failures. In this post we look at factors influencing bearing lifetime, explore the failure modes and provide some hints how to assess Read more…
What makes electric drives superior? We are very passionate about VFDs and electric drives in general. They have some unique features that make them outstanding compared to other types of drivers. What are some of these properties? This post lists 8 reasons that make electric drives superior to their traditional Read more…