How are the motor load points defined? Customer is often interested in defining the performance (e.g. losses and efficiency) of a motor drive for specific operating points. But how are the motor load points defined? Over the years working with variable speed inverter fed motors I come across this topic. 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…
Load types and characteristics Type of load is relevant for VFD hardware dimensioning and selection of most suitable VFD topology [1]. Sometimes the load type determines what kind of rectifier (front end) is required. Also, load type may affect some options and features that the VFD shall have. Therefore, it Read more…