Miniature turbo-Brayton technologies for space-borne thermal-to-electric power converters

2002 ◽  
Author(s):  
Mark V. Zagarola ◽  
Walter L. Swift ◽  
John A. McCormick ◽  
Michael G. Izenson
Keyword(s):  
Electric Power ◽  
Power Converters

Stress Reduction

2016 ◽  
pp. 262-301
Keyword(s):  
Electric Power ◽  
Design Process ◽  
Stress Reduction ◽  
Printed Circuit Board ◽  
Power Converters ◽  
High Amplitude ◽  
Power Converter ◽  
Operating Conditions ◽  
Circuit Board ◽  
Inrush Current

After evaluation of reliability in the previous chapters and its consideration as a converter figure of merit, in this and the next chapters, guidelines for improvement of reliability are presented. These methods are used in both design and operation process of the converter. The focus of this chapter is on the component stress reduction in the design process. Based on background of chapter two, reliability of a converter increases if it operates at a set point with low stress. It is assumed that the converter is under design process or operates without fault. The methods for reliability improvement in faulty converters are discussed in the next chapters. In this chapter, methods for reducing electric field are described at both system and printed circuit board level. Low temperature operating conditions for an electric power converter are described and tools for this goal are presented. Series connection for voltage sharing and parallel connection for current sharing is explained. Novel control methods of power converters for reducing the complexity and reliable operation are presented. Control of inrush current as a typical transient problem in electric power converters is presented. Methods for preventing the over stress condition on the components in faulty cases are described. Techniques for reducing mechanical and environmental stress are expressed. Mechanical dampers for preventing the high amplitude vibration and insulating colors against humidity are presented. Industrial and real samples are presented to demonstrate application of the proposed methods.

Electric Power Converters

2016 ◽  
pp. 1-61
Keyword(s):  
Electric Power ◽  
Power Converters ◽  
Electrical Energy ◽  
Electrical Machines ◽  
The Other ◽  
Power Electronic ◽  
Power Electronic Converters ◽  
The World ◽  
Energy Conversion Systems ◽  
Electrical Motors

In this book, we discuss reliability in electrical energy converters. The first step is introducing these devices and recognizing their main functions as well as their importance. Electrical energy conversion systems consist of two main parts: Electrical machines and Power electronic converters. Electrical machines are used for converting electrical energy to mechanical one in the generator state and vice-versa in the motor state. To emphasize the importance of these devices, it may be noted that electrical motors consume about half of the total generated electrical energy in the world. On the other hand, power electronic converters are essential equipments which are used for electrical energy conditioning. These equipments have observed considerable growth in modern industries in recent years. Because energy conditioning allows us to use energy with higher efficiency and better performance, in this chapter, importance of electric power converters in modern industries is presented. The aim of this presentation is showing the dependence of various industrial functions to conversion of electric power. Basic relations of various electrical machines as well as power electronic converters are presented. In each section, some typical industrial examples are presented. This background will be used in the next chapters for reliability calculation and improvement. In fact, this chapter is an introduction on reasons of writing an individual book about reliability of electric power converters.

Improving the railway transport electric power converters reliability

2018 ◽  
pp. 55-57
Author(s):  
Yuriy Anatolyevich Pikalin ◽  
◽  
Boris Sergeyevich Sergeev ◽  
Anna Viktorovna Bondarenko ◽  
◽  
...  
Keyword(s):  
Electric Power ◽  
Power Converters ◽  
Railway Transport
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