The paper describes unconventional electrical machine - starter alternator. The concept of an electric machine used as starter generator has several variants. The designed starter represents a battery-electronics-synchronous electric machine assembly located on the engine crank shaft.

The aim of improving efficiency, safety, and reliability as part of more-electric-aircraft initiatives is mediating the rapid development of aerospace systems. In addition, the increasing need for leadership in the sociomilitary-economic area brings the focus of studies on unmanned aerial vehicles in aviation. However, developments in power electronics and control algorithms, permanent magnets, high-speed transmission elements, and iron core material technologies reveal the need for using Starter/Generator structures in hybrid propulsion systems. This paper explores the optimum design of an In-runner Synchronous Permanent Magnet Starter/Generator with specifications of 1 kW-4500 rpm for motor mode and 1.25 kW-5500 rpm for generator mode, especially for small UAVs equipped with a piston engine. Thus, charging the battery packs and the required thrust can be provided with higher efficiency. The preliminary dimensions are obtained analytically. The design issues of materials and topologies are discussed. The novel model is optimised in Ansys Maxwell 2D based on finite element analyses. Dynamic and static simulations are performed with the optimetric sensitivity method, and the efficiency study is carried out in Maxwell 3D. The data obtained as a result of analytical and numerical calculations are verified.

Optimal Design of an In-Runner Direct-Drive Synchronous Permanent Magnet Starter/Generator for UAVs

The stator parameters of the main exciter (ME) are essential for emerging advanced control algorithms of the brushless synchronous starter/generator (BSSG). Due to the special structure of BSSG, the traditional parameter estimation methods of the induction machine are inapplicable to ME. In this paper, taking advantage of the operating characteristics of the rotating rectifier, a stator parameter estimation method of ME with square voltage injection is proposed. According to the harmonic features of the stator currents of ME, an amplitude regulation approach of the injection signal is presented to terminate the commutation process of the rotating rectifier as soon as possible, resulting in prolonged conduction intervals. Since the rotor currents of ME are dc during conduction intervals and thus have no influence on the stator currents of ME, stator parameters of ME are estimated with only stator voltages and currents by the recursive least square algorithm. Finally, the effectiveness of this method is verified by simulation.

Parameter Estimation of the Main Exciter by Changing the Commutation Process of the Brushless Synchronous Starter/Generator with Signal Injection

Research on the Engineering Level of an Integrated Starter–Generator

Starter-generator

This textbook will help you learn all the skills you need to pass all Vehicle Electrical and Electronic Systems courses and qualifications.
As electrical and electronic systems become increasingly more complex and fundamental to the workings of modern vehicles, understanding these systems is essential for automotive technicians. For students new to the subject, this book will help to develop this knowledge, but will also assist experienced technicians in keeping up with recent technological advances. This new edition includes information on developments in pass-through technology, multiplexing, and engine control systems. In full colour and covering the latest course specifications, this is the guide that no student enrolled on an automotive maintenance and repair course should be without.
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Photographs, flow charts, quick reference tables, overview descriptions and step-by-step instructions. 


Case studies to help you put the principles covered into a real-life context. 


Useful margin features throughout, including definitions, key facts and ‘safety first’ considerations.

Automobile electrical and electronic systems

The internal combustion engine that powers the modern automobile has changed very little from its initial design of some eighty years ago. Unlike many high tech advances, engine design still depends on an understanding of basic fluid mechanics and thermodynamics. This text offers a fresh approach to the study of engines, with an emphasis on design and on fluid dynamics. Professor Lumley, a renowned fluid dynamicist, provides a lucid explanation of how air and fuel are mixed, how they get into the engine, what happens to them there, and how they get out again. Particular attention is given to the complex issue of pollution. Examples are taken from the early days of engine design, as well as the latest designs, such as stratified charge gasoline direct injection engines. It is intended that the text be used in conjunction with the Stanford Engine Simulation Program (ESP). This user-friendly, interactive software tool answers a significant need not addressed by other texts on engines.

Engines: An Introduction

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Citations

Optimal Design of an In-Runner Direct-Drive Synchronous Permanent Magnet Starter/Generator for UAVs

Parameter Estimation of the Main Exciter by Changing the Commutation Process of the Brushless Synchronous Starter/Generator with Signal Injection

Research on the Engineering Level of an Integrated Starter–Generator

References

Automobile electrical and electronic systems

Engines: An Introduction