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- W1486333333 abstract "The design principles of the hybrid‐field generator are based on those of a salient pole synchronous machine. The design attempts to combine the characteristics of a permanent magnet generator with the versatility of a wound rotor machine. This concept permits the flux in the air‐gap, produced by the permanent magnets, to be controlled by varying the field coil excitation current. The embedded magnets and field coils are fitted to the salient pole rotor which is the essence of the hybrid‐field generator design. The stator of the synchronous generator has a standard three phase, star connected, distributed winding. Depending on the speed of the machine, the wound rotor field can enable the generator to operate in the boost, permanent magnet (normal) or buck mode, thereby permitting a constant voltage to be generated within the load and speed range. This does not eliminate the use of power electronics but would tend to reduce the rating of the control circuitry and thus reduce the cost as well as the losses. The primary purpose was to optimise or at least substantially improve the magnetic circuit performance in terms of an increase in the output power per unit volume of magnetic material and to investigate whether constant voltages of 24 V, 54 V, 82 V, and 178 V (ac) could be maintained over an extended operational speed range of the prototype. This was attempted through the innovative design of the magnetic circuit and materials, the shape and size of the magnets and pole ends, within the limitations of the existing machine dimensions. The general purpose is therefore to broaden the available knowledge base relevant to the hybrid‐field generator concept for off‐grid applications." @default.
- W1486333333 created "2016-06-24" @default.
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- W1486333333 date "2009-01-01" @default.
- W1486333333 modified "2023-09-26" @default.
- W1486333333 title "IMPROVEMENT OF THE HYBRID-FIELD GENERATOR CONCEPT" @default.
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- W1486333333 doi "https://doi.org/10.1063/1.3223956" @default.
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