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This paper suggests design of variable flux motor for variable speed operation. The calculation method of electrical parameters to meet variable speed condition is suggested, and the basic motor shape is decided using the relationships between the calculated electrical parameters and motor geometry. The difference between corecivity of two types of magnet is used to control flux. To prevent irreversible...
This paper investigates demagnetization characteristics of rare-earth permanent magnets used in electric machines. A test fixture was designed and built to induce controllable local demagnetization in the magnet sample under test. A range of demagnetizing magnetomotive force (MMF) was applied to force the magnet samples to operate at various points along their B-H curves. The degree of demagnetization...
This paper proposes Series Input Parallel Output (SIPO) interleaved Active Clump Forward (ACF) converter with novel integrated magnetic components that may achieve high power density. The proposed converter consists of two ACF converters in SIPO connection to share the input voltage and output current. The natural magnetizing reset can be realized by the active clump circuit. The SIPO connection distributes...
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