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AuthorRamshaw, Raymond. author
TitlePower Electronics [electronic resource] : Thyristor Controlled Power for Electric Motors / by Raymond Ramshaw
ImprintDordrecht : Springer Netherlands : Imprint: Springer, 1973
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Descript X, 223 p. online resource


The following pages are meant for those who wish to use thyristors. The details of the physics of semiconductor materials or the design of thyristors themselves are unnecessary here but a general description of the device may help to avoid pitfalls during electric circuit design. Thyristor is the internationally recognized name for a particular semiยญ conductor device. The name is derived from the Greek, the first part meaning switch and the second part an association with the transistor family. It has a trade name, viz. SCR (silicon controlled rectifier) and it got this name principally because it is a silicon device and it is used as a rectifier which can be controlled. As a controlled switch it forms a group together with the electromagnetic relay, the thyratron and the mercury arc rectifier. The advantages and disadvantages of the thyristor become apparent in the process of describing the device and its range of application. However, the present general interest, development and use of the thyristor, indicates that for many cases its many advantages make it superior to other devices. Control of rotating electric machines is a major interest of the author so that in this book the applications of the thyristor are towards this end. Thyristors are used so much in connection with the control of machines that it is worthwhile to go into some details of both the electric drive to be controlled and the possible thyristor control units


1. Power Electronics and Rotating Electric Drives -- 1.1. Introduction -- 1.2. Power Electronics -- 1.3. Rotating Electric Drives -- References and Bibliography -- 2. The Thyristor -- 2.1. Introduction -- 2.2. Semiconductors -- 2.3. Thyristor Characteristics -- 2.4. Thyristor Turn-Off -- 2.5. Thyristor Ratings -- 2.6. Thyristor Manufacture -- 2.7. Thyristors in Circuitsx -- 2.8. Thyristor Protection Circuits -- 2.9. Relative Merits of Thyristors -- 2.10. The Bidirectional Triode Thyristor (Triac) -- 2.11. Summary -- Worked Examples -- References and Bibliography -- Problems -- 3. Induction Motor Control -- 3.1. Introduction -- 3.2. Induction Motor Starting -- 3.3. Induction Motor Speed Control -- References -- Problems -- 4. Direct Current Motor Control -- 4.1. Introduction -- 4.2. Starting Direct Current Motors -- 4.3. Speed Control of Direct Current Motors -- 4.4. Position Control by Direct Current Motors -- References and Bibliography -- Problems -- 5. Synchronous Motor Control -- 5.1. Introduction -- 5.2. Synchronous Motor Starting -- 5.3. Speed Control -- 5.4. Synchronous Motor Excitation -- 5.5. A Synchronous or a Direct Current Motor? -- References and Bibliography -- Appendices -- I. Logic Circuitry for Inverter Control -- II. Logic Circuitry for Bidirectional Converter -- III. Logic Circuitry for On-Off Servo -- References -- Additional Problems for Chapters One, Two, Three and Four

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