DC electrical machines

The present invention provides a dc electrical machine with a large number of phases. The machine includes a rotor (8) and a stator assembly (6). The rotor (8) has Np rotating field poles. The stator (6) has Ns winding slots, where Ns/Np is a non-integer ratio. A stator winding includes a plurality...

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Bibliographic Details
Main Author Crane, Allan David
Format Patent
LanguageEnglish
French
German
Published 19.02.2020
Subjects
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:The present invention provides a dc electrical machine with a large number of phases. The machine includes a rotor (8) and a stator assembly (6). The rotor (8) has Np rotating field poles. The stator (6) has Ns winding slots, where Ns/Np is a non-integer ratio. A stator winding includes a plurality of coils (4) received in the winding slots and defines a plurality of stator phases. A power electronic switching assembly includes first and second dc load terminals that can be connected to external equipment and a plurality of switching modules (2). Each switching module (2) includes power electronic devices and is connected to a respective stator coil. A first proportion of the switching modules (2) are connected together in series between the first and second dc load terminals and a second proportion of the switching modules are connected together in series between the first and second dc load terminals to define two parallel dc circuits.
Bibliography:Application Number: EP20120182063