Rik De Doncker

André Veltman

Duco W.J. Pulle

Electrical drives convert in a controlled manner, electrical energy into mechanical energy. Electrical drives comprise an electrical machine, i.e. an electro-mechanical energy converter, a power electronic converter, i.e. an electrical-to-electrical converter, and a controller/communication unit. Today, electrical drives are used as propulsion systems in high-speed trains, elevators, escalators, electric ships, electric forklift trucks and electric vehicles. Advanced control algorithms (mostly digitally implemented) allow torque control over a high-bandwidth. Hence, precise motion control can be achieved. Examples are drives in robots, pick-and-place machines, factory automation hardware, etc. Most drives can operate in motoring and generating mode. Wind turbines use electrical drives to convert wind energy into electrical energy. More and more, variable speed drives are used to save energy for example, in air-conditioning units, compressors, blowers, pumps and home appliances. Key to ensure stable operation of a drive in the aforementioned applications are torque control algorithms. In Advanced Electrical Drives, a unique approach is followed to derive model based torque controllers for all types of Lorentz force machines, i.e. DC, synchronous and induction machines. The rotating transformer model forms the basis for this generalized modeling approach that ultimately leads to the development of universal field-oriented control algorithms. In case of switched reluctance machines, torque observers are proposed to implement direct torque algorithms. From a didactic viewpoint, tutorials are included at the end of each chapter. The reader is encouraged to execute these tutorials to familiarize him or herself with all aspects of drive technology. Hence, Advanced Electrical Drives encourages “learning by doing”. Furthermore, the experienced drive specialist may find the simulation tools useful to design high-performance controllers for all sorts of electrical drives.

Analysis, Modeling, Control

Advanced Electrical Drives

Josef Lutz

Heinrich Schlangenotto

Uwe Scheuermann

Semiconductor power devices are the heart of power electronics. They determine the performance of power converters and allow topologies with high efficiency. Semiconductor properties, pn-junctions and the physical phenomena for understanding power devices are discussed in depth. Working principles of state-of-the-art power diodes, thyristors, MOSFETs and IGBTs are explained in detail, as well as key aspects of semiconductor device production technology. In practice, not only the semiconductor, but also the thermal and mechanical properties of packaging and interconnection technologies are essential to predict device behavior in circuits. Wear and aging mechanisms are identified and reliability analyses principles are developed. Unique information on destructive mechanisms, including typical failure pictures, allows assessment of the ruggedness of power devices. Also parasitic effects, such as device induced electromagnetic interference problems, are addressed. The book concludes with modern power electronic system integration techniques and trends.

Physics, Characteristics, Reliability

Semiconductor Power Devices

Andreas Hirt

Wolfgang Schröder

Antonello Monti

Georg Jacobs

Kay Hameyer

The conference proceedings of the 4th Conference for Wind Power Drives (CWD) contains the collected contributions of the congress which took place on the 12th and 13th of March, 2019. The latest developments and innovations are presented in 37 articles covering the following topics: Gearbox - Torque Density, Gearbox - System Performance, Grid Conformity, Generator, Drive Train Concepts, Roller Bearings - Design and Testing, Roller Bearings - Loads, Wind 4.0 - Potential of Data Analytics, Wind 4.0 - Predictive Maintenance & Reliability, Plain Bearings and Condition Monitoring. The CWD has been held every two years since 2013 and acts as an interdisciplinary platform for knowledge and technology transfer between developers, researchers and operators. Furthermore, the conference promotes networking between industry and university in the field of wind turbine drive trains. The conference is supported by Mechanical Engineering Industry Association (VDMA) the Research Association for Drive Technology (FVA) and the IEEE Power Electronics Society.

Conference Proceedings

Conference for Wind Power Drives 2019

Rik De Doncker

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