Improvements relating to electrical power assisted steering systems

An electric power assisted steering system comprises a motor adapted to apply an assistance torque to a portion of a steering shaft in response to a motor drive signal from a drive circuit, in which the motor comprises a synchronous wound field motor of the kind comprising a stator and a rotor, in w...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: David Julian Moule, Jeffrey Ronald Coles, Andrew James Stephen Williams
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An electric power assisted steering system comprises a motor adapted to apply an assistance torque to a portion of a steering shaft in response to a motor drive signal from a drive circuit, in which the motor comprises a synchronous wound field motor of the kind comprising a stator and a rotor, in which the rotor includes at least one pole and at least one coil winding associated with the pole and the stator comprises a number of phase windings, and in which the drive circuit which is configured to provide current in the coils of the stator and rotor during operation of the motor.