The Applicability of Electrically Driven Accessories for Turboshaft Engines

Improved electrical power generation and actuation systems offer new design approaches for performing the engine control and accessory functions in helicopter propulsion systems. Present helicopter technology utilizes turboshaft engines with mechanically driven accessories. These accessories perform the functions of starting, fuel and lube pumping, variable stator actuation and inlet particle separation. This paper discusses the applicability of replacing the mechanically driven accessories with their electrically driven counterparts. An electric accessory system is defined which includes; a switched reluctance starter/generator and its associated control unit; an electric pumping and actuation system; and the engine mounting for the starter/generator. A comparison between the mechanically and electrically driven accessory systems is performed on the basis of cost, weight and reliability. Experience to date with switched reluctance machines and electrically driven turboshaft accessory systems is summarized. The benefits of electrically driven accessories are shown and recommendations for future activity for this important technology are discussed.

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The Applicability of Electrically Driven Accessories for Turboshaft Engines

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.2814084 ◽

1995 ◽

Vol 117 (2) ◽

pp. 221-226

Author(s):

M. S. Jarvis ◽

W. J. Ostergren ◽

B. Smith

Keyword(s):

Electrical Power ◽

Particle Separation ◽

Control Unit ◽

Propulsion Systems ◽

Switched Reluctance ◽

Actuation System ◽

Switched Reluctance Machines ◽

Starter Generator ◽

Actuation Systems ◽

Variable Stator

Improved electrical power generation and actuation systems offer new design approaches for performing the engine control and accessory functions in helicopter propulsion systems. Present helicopter technology utilizes turboshaft engines with mechanically driven accessories. These accessories perform the functions of starting, fuel and lube pumping, variable stator actuation, and inlet particle separation. This paper discusses the applicability of replacing the mechanically driven accessories with their electrically driven counterparts. An electric accessory system is defined, which includes a switched reluctance starter/generator and its associated control unit; an electric pumping and actuation system; and the engine mounting for the starter/generator. A comparison between the mechanically and electrically driven accessory systems is performed on the basis of cost, weight, and reliability. Experience to date with switched reluctance machines and electrically driven turbo shaft accessory systems is summarized. The benefits of electrically driven accessories are shown and recommendations for future activity for his important technology are discussed.

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Fault Tolerant Scheme of Switched Reluctance Machines for the Electro-Mechanical Actuation Systems

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.372.608 ◽

2013 ◽

Vol 372 ◽

pp. 608-611

Author(s):

Xiao Yuan Chen

Keyword(s):

Fault Tolerant ◽

Element Model ◽

Switched Reluctance ◽

Advantages And Disadvantages ◽

Dual Channel ◽

Actuation System ◽

Switched Reluctance Machines ◽

Actuation Systems ◽

Electromechanical Actuation ◽

Mechanical Actuation

As switched reluctance machines (SRM) generally offer a simple and robust design, they are very suitable for electromechanical actuation systems which need to be actuated by fault tolerant drives. This paper investigates dual-channel, dual-redundancy, lacking phase schemes of SRM guaranteeing fault tolerance and the corresponding control systems in detail are compared to point out the advantages and disadvantages of them., a new lacking phase scheme for 12/8 SRM is proposed and the finite element model based on field-circuit coupling is established, results indicate that this scheme have superior fault tolerant performance and suit tasks in electro-mechanical actuation system of aerospace environments.

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Design optimization of switched reluctance machines for starter/generator of hybrid electric vehicle by genetic algorithm

European Transactions on Electrical Power ◽

10.1002/etep.220 ◽

2009 ◽

Vol 19 (2) ◽

pp. 302-312 ◽

Cited By ~ 7

Author(s):

Jawad Faiz ◽

K. Moayed-zadeh

Keyword(s):

Genetic Algorithm ◽

Design Optimization ◽

Electric Vehicle ◽

Hybrid Electric Vehicle ◽

Switched Reluctance ◽

Switched Reluctance Machines ◽

Hybrid Electric ◽

Starter Generator

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Naval Hybrid Power Take-Off and Power Take-In – Lessons Learnt and Future Advances

10.24868/issn.2515-818x.2018.062 ◽

2018 ◽

Author(s):

M Benatmane ◽

B Salter

Keyword(s):

Electrical Power ◽

Maritime Industry ◽

Propulsion Systems ◽

Systems Architecture ◽

Hybrid Propulsion ◽

Leading Role ◽

Lessons Learnt ◽

Marine Industry ◽

Operational Systems ◽

Great Pressure

With the ever tightening of budgets and legislation, new vessel builds are facing tough times. The future maritime industry requires more efficient vessels to minimise ship operational costs with cleaner technologies that meet stringent environment regulations, reduce greenhouse gas emissions, specifically carbon emissions. Emissions reduction continues to be high on the agenda for the marine industry, it is responsible for about 2.5 percent of global greenhouse emissions1 and is under great pressure to reduce its environmental impact. With pressure comes the opportunity to incentivize innovation, developments and implementation of energy efficient measures, both design and operational. Naval propulsion systems are no different from other industries, and the industry is exploring ways to optimise propulsion and electrical power generation systems architecture for better performance and efficiency. Electric technology plays a leading role. The paper will: Provide a brief overview about the hybrid propulsion concept, with key electrical, mechanical qualities and issues. Describe different designs configurations and performances of hybrid propulsion systems from demonstrated and operational systems in the commercial and naval world. Cover the lessons learnt in technologies and controls used on such systems. Examine future architectures including energy storage and explore the benefits and the flexibility these can bringto the hybrid propulsion sphere.

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