Switch Mode Power Conversion

Basic Theory and Design

K.Kit Sum

• Publisher: Routledge
• Year: 2017
• ISBN:
  9781351412124
• Edition: 1
• Topic: Tecnologia e ingegneria
• Subtopic: Ingegneria generale

First Published in 2017. Although the concept of switch mode power conversion is not new, the technology to utilize it has only recently become available. This outstanding monograph provides a complete overview of this subject, enabling engineers to design and implement systems to meet specific requirements. Using the simplest possible language for easy understanding, Switch Mode Power Conversion offers such helpful features as a complete listing of calculator programs, over 200 references, and numerous graphical design aids... presents examples of basic converter de­ signs... provides guidelines for avoiding input filter interaction with converter input impedance... allows designers to check their work with performance evaluation methods... simplifies the explanation of magnetic components basics... and much more! With this timely volume-the first, single-source reference in this field-electrical and electronic engineers; designers and manufacturers of electronic equipment; and aerospace, computer, control and communication engineers will gain a full appreciation of Switch Mode Power Conversion

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Switch Mode Power Converters

1.1 Fundamental Concepts

Power processing has always been an essential feature of most electrical equipment. The differences in voltage and current requirements for different applications have led to the design of dedicated power converters to meet their specific requirements.

In general, power conversion involves the process of either converting alternating current (ac) to direct current (dc) or converting dc of one voltage level to dc of another voltage level or both. The process of converting dc to ac, however, is sometimes necessary. A processor of this kind is generally known as an inverter [1, 9-16, 18-21].

The concept of switch mode power conversion is not new, but the technology was not quite ready until the last decade or so. The availability of fast-switching high-voltage transistors, low-loss ferrite and metallic glass materials made the complete implementation of switch mode power converters more reliable and practical.

The most significant differences between the linear and the switch mode regulators involve their efficiency, size, weight, thermal requirement, response time, and noise characteristics.

Ideal components in a linear regulator have little effect on the overall performance of the regulator, whereas in a switching regulator ideal components would make a 100% efficient regulated power converter.

The linear regulator is, therefore, sometimes referred to as a dissipative regulator.

In the case of the switching regulator, the disadvantages of the linear regulator are eliminated. However, the switching regulator is also unable to retain the advantages of the linear regulator; namely, it is noisy with switching transients, has complicated circuitry, is difficult to analyze, and has slow transient response.

The switching converter is difficult to analyze...