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A new rotor design for flux weakening capability improvement in spoke-type interior permanent magnet synchronous machines
- Publication Year :
- 2014
- Publisher :
- IEEE, 2014.
-
Abstract
- In many applications, electric machines are designed for operation over a wide speed range and require important flux weakening capabilities at high speeds. This paper presents and innovative rotor mechanical design that endows an interior permanent magnet (IPM) machine with an intrinsic capability of reducing its own rotor flux at high speeds. Unlike most state-of-the-art flux-weakening techniques, the design does not involve any additional current source nor demagnetization currents to be injected into stator circuits. It relies on a purely mechanical device that establishes a partial magnetic short circuit between rotor permanent magnets. The device is able to self-activate by centrifugal force when the speed exceeds a given threshold that can be fixed by design. The paper presents criteria for dimensioning the new IPM rotor and a mathematical model to predict its performance. The proposed solution is implemented into a motor prototype whose manufacturing and testing are discussed for experimental validation.
- Subjects :
- electric machines
Automotive drives
Stator
Computer science
innovative rotor mechanical design
centrifugal force
Demagnetization
Mechanical engineering
IPM machine
Permanent magnet synchronous generator
permanent magnet machines
Mobile communication
stators
law.invention
stator circuits
law
Control theory
Robustness (computer science)
Prototypes
Robustness
Dimensioning
magnetic circuits
Electronic circuit
partial magnetic short circuit
spoke-type interior permanent magnet synchronous machines
Flux weakening
rotor permanent magnets
AC machines
purely mechanical device
permanent magnets
flux weakening capability improvement
Indexes
Current source
rotor flux
magnetic circuits,permanent magnet machines,permanent magnets,rotors,stators,synchronous machines,IPM machine,centrifugal force,electric machines,flux weakening capability improvement,innovative rotor mechanical design,mathematical model,partial magnetic short circuit,purely mechanical device,rotor design,rotor flux,rotor permanent magnets,spoke-type interior permanent magnet synchronous machines,stator circuits,Demagnetization,Indexes,Magnetosphere,Mobile communication,Prototypes,Robustness,Rotors,AC machines,Automotive drives,Flux weakening,Permanent magnet machines,Prototypes
rotor design
Magnetic circuit
rotors
Magnetosphere
Magnet
synchronous machines
mathematical model
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....48bc48aeb113b069d0465f05621ee601