Permanent magnetically excited electrical rotary drive
AssigneesSulzer Electronics AG, Lust Antriebstechnik GmbH
InventorReto Schöb
Life of this patent
Estimating the term…
Abstract
A permanent magnetically excited electrical rotary drive for a blood pump is proposed, comprising a permanent magnetic rotor and a stator, said stator comprising a drive winding having at least two loops for the production of a magnetic drive field which produces a torque on the rotor, with each loop belonging to a different electrical phase, furthermore comprising a setting device which supplies each loop in each case with a phase current or in each case with a phase voltage as a setting parameter, with the setting device comprising a separate power amplifier for each loop so that the setting parameter for each loop can be regulated independently of the setting parameter for the other loops.
Claims10
A permanent magnetically excited electrical rotary drive, comprising a permanent magnetic rotor and a stator, said stator comprising a drive winding having at least two loops for the production of a magnetic drive field which produces a torque on the rotor, with each loop belonging to a different electrical phase, comprising a setting device which supplies each loop in each case with a phase current or in each case with a phase voltage as a setting parameter, wherein each phase includes a separate switching means for switching off only its associated phase in a case of an excessive current in the associated phase, and wherein the setting device comprises a separate bipolar power amplifier for each loop so that the setting parameter for each loop can be regulated by a closed loop control independently of the setting parameter for the other loops.
A permanent magnetically excited electrical rotary drive, comprising a permanent magnetic rotor and a stator, wherein the rotary drive is designed as a bearingless motor which magnetically journals the rotor of the rotary drive, said stator comprising a drive winding having at least two loops for the production of a magnetic drive field which produces a torque on the rotor, and being designed as a drive and bearing stator which furthermore comprises a control winding in addition to the drive winding, with each loop belonging to a different electrical phase, furthermore comprising a setting device which supplies each loop in each case with a phase current or in each case with a phase voltage as a setting parameter, wherein the setting device comprises a separate bipolar power amplifier for each loop so that the setting parameter for each loop can be regulated by a closed loop control independently of the setting parameter for the other loops.
Dependencies are inferred from the claim text.