Dual-rotor permanent magnet induction motor
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A dual-rotor permanent magnet induction motor (DRPMIM) is a motor having two
Stator on the outside
In one arrangement, the motor has an ordinary induction motor stator. A squirrel-cage rotor connected to the output shaft rotates within the stator at slightly less than the rotating field from the stator. Within the squirrel-cage rotor is a freely rotating permanent magnet rotor, which is locked in with rotating field from the stator. The effect of the inner rotor is to reenforce the field from the stator.[1] Because the stator slips behind the rotating magnetic field inducing a current in the rotor, this type of motor meets the definition of an induction motor. [3][4]
Stator between rotors
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Rotor_for_dual_rotor_motor.pdf/page1-220px-Rotor_for_dual_rotor_motor.pdf.jpg)
In another arrangement, one rotor is inside the stator with a second rotor on the outside of the stator.[2] The photo labelled FIG. 8 is from a patent application. It shows two rotors assembled into a single unit, with six permanent magnets attached to the outer surface of the inner rotor, and six to the inner surface of the outer rotor.[5]
References
- ^ ISSN 1874-1290.)
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: CS1 maint: DOI inactive as of April 2024 (link - ^ ISSN 1996-1073.
- ^ "IEC 60050 Section 411-31: Rotation Machinery - General". International Electrotechnical Commission. October 1990. Retrieved March 22, 2021.
- ^ induction motor. HarperCollins. 2021. Retrieved April 9, 2021.
- ^ accessdate=March 14, 2021 US 6924574B2, "Dual-rotor, radial-flux, toroidally-wound, permanent-magnet machine", assigned to Wisconsin Alumni Research Foundation