**Preface to "Performance of Induction Machines"**

Induction machines are one of the most important technical applications for both the industrial world and private use. Since their invention (along with the achievements of Galileo Ferraris, Nikola Tesla, and Michal Doliwo-Dobrowolski), they have been widely used in different electrical drives and as generators, thanks to their features such as reliability, durability, low price, high efficiency, and resistance to failure. The main objective of this book is to contribute to the development of induction machines in all areas of their applications.

The methods for designing and using induction machines and drives are, in many aspects, very similar to the methods used in other electric machines but have their own specificity. Many issues discussed here are based on the fundamental achievements of authors such as Nasar, Boldea, Yamamura, Tegopoulos, and Kriezis, who laid the foundations for the development of induction machines, which are still relevant today. The control algorithms presented here are based on the achievements of Blaschke (field vector-oriented control) and Depenbrock or Takahashi (direct torque control), who created standards for the control of induction machines.

Today's induction machines must meet very stringent requirements of reliability, availability, high efficiency, and performance. Thanks to the application of highly efficient numerical algorithms, it is possible to design induction machines and entire very complex drive (or generator) systems faster and at a lower cost. At the same time, progress in the field of materials science and technology enables the development of ever more complex machine topologies.

The Guest Editor hopes that the publication of this collection of scientific papers, dedicated to the topic of induction machines, will contribute to the dissemination of modern knowledge about these machines among specialists in this subject.

> **Ryszard Palka** *Editor*
