Electric Machine with Permanent Magnetic Rotor

Dave Rodger (Inventor), Hong Cheng Lai (Inventor), Roger Hill-Cottingham (Inventor)

Research output: Patent

Abstract

An electric motor (10) comprises a stator (20) having a primary winding and a rotor (130a,b) arranged to rotate in the stator (20). The rotor comprises a shaft (160), a first magnetic rotor component (140) and a second magnetic rotor component (150), each magnetic rotor component (140,150) having a magnetic pole of a first polarity (43,43',53,53') and a magnetic pole of a second polarity (47,47',57,57'). At least one of the first and second rotor components (140,150) further comprises a structure (35) for carrying induced eddy currents. The second magnetic rotor component (150) is rotatable with respect to the first magnetic rotor component (140) around the shaft (160) from a low-flux orientation to a high-flux orientation. The motor (10) is arranged such that the second magnetic rotor component (150) is in the low-flux orientation when the rotor (130a,b) is at rest and is in the high-flux orientation when the rotor (130a,b) is rotating at an operating speed.
Original languageEnglish
Patent numberWO2004107539 (A1)
IPCH02K7/12
Publication statusPublished - 29 Jan 2004

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Electric machinery
Rotors
Fluxes
Stators
Poles
Electric motors
Eddy currents

Cite this

Rodger, D., Lai, H. C., & Hill-Cottingham, R. (2004). IPC No. H02K7/12. Electric Machine with Permanent Magnetic Rotor. (Patent No. WO2004107539 (A1)).

Electric Machine with Permanent Magnetic Rotor. / Rodger, Dave (Inventor); Lai, Hong Cheng (Inventor); Hill-Cottingham, Roger (Inventor).

IPC No.: H02K7/12. Patent No.: WO2004107539 (A1).

Research output: Patent

Rodger, D, Lai, HC & Hill-Cottingham, R 2004, Electric Machine with Permanent Magnetic Rotor, Patent No. WO2004107539 (A1), IPC No. H02K7/12.
Rodger D, Lai HC, Hill-Cottingham R, inventors. Electric Machine with Permanent Magnetic Rotor. H02K7/12. 2004 Jan 29.
Rodger, Dave (Inventor) ; Lai, Hong Cheng (Inventor) ; Hill-Cottingham, Roger (Inventor). / Electric Machine with Permanent Magnetic Rotor. IPC No.: H02K7/12. Patent No.: WO2004107539 (A1).
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abstract = "An electric motor (10) comprises a stator (20) having a primary winding and a rotor (130a,b) arranged to rotate in the stator (20). The rotor comprises a shaft (160), a first magnetic rotor component (140) and a second magnetic rotor component (150), each magnetic rotor component (140,150) having a magnetic pole of a first polarity (43,43',53,53') and a magnetic pole of a second polarity (47,47',57,57'). At least one of the first and second rotor components (140,150) further comprises a structure (35) for carrying induced eddy currents. The second magnetic rotor component (150) is rotatable with respect to the first magnetic rotor component (140) around the shaft (160) from a low-flux orientation to a high-flux orientation. The motor (10) is arranged such that the second magnetic rotor component (150) is in the low-flux orientation when the rotor (130a,b) is at rest and is in the high-flux orientation when the rotor (130a,b) is rotating at an operating speed.",
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AU - Rodger, Dave

AU - Lai, Hong Cheng

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N2 - An electric motor (10) comprises a stator (20) having a primary winding and a rotor (130a,b) arranged to rotate in the stator (20). The rotor comprises a shaft (160), a first magnetic rotor component (140) and a second magnetic rotor component (150), each magnetic rotor component (140,150) having a magnetic pole of a first polarity (43,43',53,53') and a magnetic pole of a second polarity (47,47',57,57'). At least one of the first and second rotor components (140,150) further comprises a structure (35) for carrying induced eddy currents. The second magnetic rotor component (150) is rotatable with respect to the first magnetic rotor component (140) around the shaft (160) from a low-flux orientation to a high-flux orientation. The motor (10) is arranged such that the second magnetic rotor component (150) is in the low-flux orientation when the rotor (130a,b) is at rest and is in the high-flux orientation when the rotor (130a,b) is rotating at an operating speed.

AB - An electric motor (10) comprises a stator (20) having a primary winding and a rotor (130a,b) arranged to rotate in the stator (20). The rotor comprises a shaft (160), a first magnetic rotor component (140) and a second magnetic rotor component (150), each magnetic rotor component (140,150) having a magnetic pole of a first polarity (43,43',53,53') and a magnetic pole of a second polarity (47,47',57,57'). At least one of the first and second rotor components (140,150) further comprises a structure (35) for carrying induced eddy currents. The second magnetic rotor component (150) is rotatable with respect to the first magnetic rotor component (140) around the shaft (160) from a low-flux orientation to a high-flux orientation. The motor (10) is arranged such that the second magnetic rotor component (150) is in the low-flux orientation when the rotor (130a,b) is at rest and is in the high-flux orientation when the rotor (130a,b) is rotating at an operating speed.

M3 - Patent

M1 - WO2004107539 (A1)

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