山形大学紀要（工学） 第7巻 第1号（1962）001-068
Study on Dielectric Type (Condenser Type)
Rotating Machine and Apparatus
Chapter 1. General Consideration
Chapter 2. Construction and Theoretical Cosideration
Chapter 3. Design Procedure of Electrode Dimensions
Chapter 4. High Frequency Generator
Chapter 5. D.C.-A.C. Converter
Chapter 6. Deviation Detector
Chapter 7. Conclusion
Pleviously the author presented the report of study on dielectric type (Condenser type or electrostatic type) high frequency generator. Moreover the rotating machine and the apparatus of this type are utilized to control or measuring elements such as D.C.-A.C. converter, tachogenerator and deviation detector (or position detector, namely, transducer to electrical signal from small linear or angular displacement).
Chapter 2 presents the discusions of general construction of this type and the theoretical treatments that are applicable to the all machines and devices above mentioned.
Chapter 3 is concerned with the design of the optimum electrode dimensions. To develop this method, it is necessary to appreciate the variation of interelectrode capacity. For this purpose, the wave form of variation of this capacity is measured and the values of C_0, C_1, etc. are measured concerning some representative types of electrode construction such as plate electrode, rectangular teeth and trapezoidal teeth electrode, where C_0 is the mean value of this capacity and C_1 is the amplitude of the fundamental component of variation of this capacity.
Chapters 4 through 6 contain the applications of this method to each machines and devices. In addition, it is emphasized that this method is not only applicable to the dielectric type, but also to the control elements of the induction type and the other electric machinery such as printed circuit servomotor.
Chapter 4 gives several conditions to obtain maximum output for various loading states and some numerical examples. By these examples, it is clarified that this machine has more excellent output characteristics than an electromagnetic induction type alternator within the frequency range of 10KC - 100KC.
Paragraph 4.9 and chapter 5 treat rotating machines of this type which are utilized to control devices. The former cotains detailed treatments of tachogenerator and the latter, D.C.-A.C. converter. Chapter 5 gives some experimental results about the stability of the converters which is affected by the drift of the contact potential difference.
Chapter 6 presents theoretical and experimental treatments of the deviation detector of both types, namely, amplitude type (the deviation is indicated by the amplitude of electrical signal) and phase type. Besides the dielectric type, there are many others, that is, Inductosyn, Vernier resolver and Telecote, etc..But the amplitude type has a superiority on its voltage sensitivity over others and the phase type is suitable for the digital counting detector.