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Title: Disc and linear forms of electronically controlled permanent-magnet claw machines
Author: Al-Abadi , H. J
Awarding Body: University of Manchester
Current Institution: University of Manchester
Date of Award: 1980
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This thesis discusses the advantages, performance and design of permanent magnet motors with, claw type armatures when used to produce a brushless d.c. drive. The work in this thesis can conveniently be divided into two parts. The first part included chapters 2 to 5 inclusive is concerned with the fundamental differences between the claw and drum-wound type of armatures. A double rotor disc shaped version of the claw armature has been developed to reduce the. armature leakage inductance and experimental results show that the claw machine can be designed to produce a more flexible medium power drive with high output/volume and efficiency than a more conventional drum-wound type of armature. The second part is included in chapters 6 to 8 inclusive and describes the development of a linear form of the claw motor. A linear version of the claw machine has been developed and consideration is given' in chapter 8 to the machines performance including the thrust and acceleration for linear motor applications particularly as a passenger lift drive. The linear claw machine uses an active stator divided into sections and each section is on! y energised when it is overlapped by the moving member. Chapter 7 gives the design and construction of the power drive circuit which produces transient free commutation from one stator section to the next.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available