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US 9,318,937 B2Granted
Flux controlled PM electric machine rotor
AssigneeHamilton Sundstrand Corporation
InventorRichard A. Himmelmann
Life of this patent
Estimating the term…
Abstract
A flux-regulated permanent magnet machine (PMM) includes a stationary portion and a rotating portion. The stationary portion includes a plurality of stator/armature windings. The rotating portion includes a plurality of permanent magnets and a control/field winding that is supplied with current to control the magnetic flux presented to the stator/armature windings.
Claims10
A permanent magnet machine comprising:
- an excitation controller;
- a wound field stator exciter configured to receive a control current from the excitation controller;
- stator armature windings;
- rotating exciter windings that develop an alternating current (AC) voltage in response to excitation provided by the wound field stator exciter;
- a rotating rectifier that rectifies the AC voltage developed in the rotating exciter windings to a direct current (DC) voltage;
- a control winding configured to receive winding current using the DC voltage;
- and
- rotating permanent magnets embedded within a ferromagnetic yoke;
- wherein the rotating permanent magnets are configured such that magnetic flux of the rotating permanent magnets flows through the ferromagnetic yoke and is only received by the stator armature windings when the winding current is received by the control winding;
- wherein the control winding is configured to saturate the ferromagnetic yoke to direct the magnetic flux of the rotating permanent magnets to the stator armature windings when the control current is received by the control winding.
7 more elements
A permanent magnet machine comprising:
- a stator exciter that includes at least one exciter permanent magnet;
- stator armature windings;
- rotating exciter windings that are magnetically coupled to the at least one exciter permanent magnet;
- a rotating rectifier that rectifies alternating current (AC) voltage developed in the rotating exciter windings to a direct current (DC) voltage;
- a control winding configured to receive control current using the DC voltage;
- and
- rotating permanent magnets embedded within a ferromagnetic yoke;
- wherein the rotating permanent magnets are configured such that magnetic flux of the rotating permanent magnets flows through the ferromagnetic yoke and is only received by the stator armature windings when the control current is received by the control winding.
5 more elements
A flux-regulated permanent magnet machine (PMM) comprising:
- a stationary portion that includes stator armature windings and a stator exciter;
- and
- a rotating portion comprising:
- exciter armature windings magnetically coupled with the stator exciter;
- a ferromagnetic yoke;
- a plurality of permanent magnets embedded within the ferromagnetic yoke;
- and
- a control winding configured to receive excitation current from the exciter armature windings;
- wherein the plurality of permanent magnets are configured such that magnetic flux of the plurality of permanent magnets flows through the ferromagnetic yoke and is only received by the stator armature windings when the excitation current is received by the control winding.
6 more elements
Dependencies are inferred from the claim text.