WO2012017303A3 - Permanent magnets for a generator with reduced cogging - Google Patents

Permanent magnets for a generator with reduced cogging Download PDF

Info

Publication number
WO2012017303A3
WO2012017303A3 PCT/IB2011/001814 IB2011001814W WO2012017303A3 WO 2012017303 A3 WO2012017303 A3 WO 2012017303A3 IB 2011001814 W IB2011001814 W IB 2011001814W WO 2012017303 A3 WO2012017303 A3 WO 2012017303A3
Authority
WO
WIPO (PCT)
Prior art keywords
magnets
stacks
tooth
generator
shaped magnetic
Prior art date
Application number
PCT/IB2011/001814
Other languages
French (fr)
Other versions
WO2012017303A2 (en
Inventor
Francesco Battistella
Original Assignee
Nuova Saccardo Motori S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nuova Saccardo Motori S.R.L. filed Critical Nuova Saccardo Motori S.R.L.
Priority to EP11754917.0A priority Critical patent/EP2601729A2/en
Publication of WO2012017303A2 publication Critical patent/WO2012017303A2/en
Publication of WO2012017303A3 publication Critical patent/WO2012017303A3/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • H02K1/27915—Magnets shaped to vary the mechanical air gap between the magnets and the stator
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C13/00—Cream; Cream preparations; Making thereof
    • A23C13/08—Preservation
    • A23C13/10—Preservation by addition of preservatives
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C15/00—Butter; Butter preparations; Making thereof
    • A23C15/18—Preservation
    • A23C15/20—Preservation by addition of preservatives or antioxidants
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C21/00—Whey; Whey preparations
    • A23C21/08—Whey; Whey preparations containing other organic additives, e.g. vegetable or animal products
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C3/00—Preservation of milk or milk preparations
    • A23C3/08—Preservation of milk or milk preparations by addition of preservatives
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Power Engineering (AREA)
  • Biochemistry (AREA)
  • Zoology (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention concerns a permanent magnet generator with reduced cogging effect, comprising a stator (4) provided with a plurality of stacks of tooth- shaped magnetic laminations (6; 306) having respective electric windings (10) arranged radially around the rotation axis (8) of the generator, which alternate with a plurality of slots (12; 312) having a correspondent opening (14; 314), and a rotor (2) provided with a plurality of permanent magnets (16; 116; 216) arranged radially spaced from the rotation axis (8) of the generator, in which the permanent magnets (16; 116; 216) have skew edges. The air gap (20) between the stacks of tooth-shaped magnetic laminations (6; 306) and the permanent magnets (16; 116; 216) is variable; the magnets are variable air gap magnets in which the top and bottom sides of the magnets define an internal curved surface and an external curved surface having the same curvature direction and defining, in cross section, with respect to the height of the magnet in the direction of the rotation axis, non-concentric circle arcs with different radiuses (R1, R2, R11, R12), so that the distance between the two surfaces that represents the thickness of the magnets varies in its cross section; the rotor (2) is outside the stator (4) and the circle arc defined by the radius (Ri; R1; R11) of the internal curved surface in cross section, located in front of the stacks of tooth-shaped magnetic laminations (6), is not concentric with the circle arc defined by the radius (Rs) corresponding to the cylindrical surface defined by the stacks of tooth-shaped magnetic laminations (6).
PCT/IB2011/001814 2010-08-04 2011-08-04 Permanent magnet generator with reduced cogging effect and related magnets WO2012017303A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11754917.0A EP2601729A2 (en) 2010-08-04 2011-08-04 Permanent magnets for a generator with reduced cogging

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI2010A000220 2010-08-04
ITVI2010A000220A IT1401625B1 (en) 2010-08-04 2010-08-04 PERMANENT MAGNET GENERATOR WITH REDUCED COGGING EFFECT AND RELATED MAGNET.

Publications (2)

Publication Number Publication Date
WO2012017303A2 WO2012017303A2 (en) 2012-02-09
WO2012017303A3 true WO2012017303A3 (en) 2012-06-14

Family

ID=43417077

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2011/001814 WO2012017303A2 (en) 2010-08-04 2011-08-04 Permanent magnet generator with reduced cogging effect and related magnets

Country Status (3)

Country Link
EP (1) EP2601729A2 (en)
IT (1) IT1401625B1 (en)
WO (1) WO2012017303A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015061464A (en) * 2013-09-20 2015-03-30 株式会社東芝 Permanent magnet rotary electric machine and wind generator system
CN104617689B (en) 2015-01-30 2017-07-07 新疆金风科技股份有限公司 The module unshakable in one's determination of wind-driven generator and its stator core and stator
US10724502B2 (en) 2018-05-22 2020-07-28 Creating Moore, Llc Vertical axis wind turbine apparatus and system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040070300A1 (en) * 2002-10-10 2004-04-15 Fu Zhenxing (Zack) Low torque ripple surface mounted magnet synchronous motors for electric power assisted steering
US20060038457A1 (en) * 2004-08-20 2006-02-23 Shin-Etsu Chemical Co., Ltd. Permanent magnet motor
JP2006304407A (en) * 2005-04-15 2006-11-02 Mitsubishi Electric Corp Permanent magnet type rotary electric machine, and method for producing rotor of the same
US20090224622A1 (en) * 2008-03-06 2009-09-10 Lg Electronics Inc. Motor and washing machine using the same
WO2010051691A1 (en) * 2008-11-05 2010-05-14 鹤山市鹤龙机电有限公司 Direct-drive permanent magnet synchronous small wind generator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040070300A1 (en) * 2002-10-10 2004-04-15 Fu Zhenxing (Zack) Low torque ripple surface mounted magnet synchronous motors for electric power assisted steering
US20060038457A1 (en) * 2004-08-20 2006-02-23 Shin-Etsu Chemical Co., Ltd. Permanent magnet motor
JP2006304407A (en) * 2005-04-15 2006-11-02 Mitsubishi Electric Corp Permanent magnet type rotary electric machine, and method for producing rotor of the same
US20090224622A1 (en) * 2008-03-06 2009-09-10 Lg Electronics Inc. Motor and washing machine using the same
WO2010051691A1 (en) * 2008-11-05 2010-05-14 鹤山市鹤龙机电有限公司 Direct-drive permanent magnet synchronous small wind generator

Also Published As

Publication number Publication date
ITVI20100220A1 (en) 2012-02-05
EP2601729A2 (en) 2013-06-12
IT1401625B1 (en) 2013-07-26
WO2012017303A2 (en) 2012-02-09

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