WO1995033596A1 - Modular electric machines - Google Patents

Modular electric machines Download PDF

Info

Publication number
WO1995033596A1
WO1995033596A1 PCT/AU1995/000294 AU9500294W WO9533596A1 WO 1995033596 A1 WO1995033596 A1 WO 1995033596A1 AU 9500294 W AU9500294 W AU 9500294W WO 9533596 A1 WO9533596 A1 WO 9533596A1
Authority
WO
WIPO (PCT)
Prior art keywords
cores
machines
rotors
core
electric machines
Prior art date
Application number
PCT/AU1995/000294
Other languages
French (fr)
Inventor
Tadeusz Stec
Original Assignee
Amd International Pty. Ltd.
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
Priority to AUPM5594 priority Critical
Priority to AUPM5594A priority patent/AUPM559494A0/en
Priority to AUPM9081 priority
Priority to AUPM9081A priority patent/AUPM908194A0/en
Priority to AUPN0567 priority
Priority to AUPN0567A priority patent/AUPN056795A0/en
Application filed by Amd International Pty. Ltd. filed Critical Amd International Pty. Ltd.
Publication of WO1995033596A1 publication Critical patent/WO1995033596A1/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K15/00Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/026Wound cores
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/02Machines with one stator and two or more rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2201/00Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/06Magnetic cores, or permanent magnets characterised by their skew

Abstract

Production of electric rotating machines of disk construction in which cores of rotors (1) and stators (2) are wound before slots are cut. Skewed slots are cut on one/both sides of core. Electrical windings of adjacent stators/rotors are rotated by 180 electrical degrees.

Description

Modular Electric Machines

Production and cutting cores from non crystal, amorphous materials to magnetic circuits of rotating electric machines.

The invention regards methods of production an electric rotating machines from non crystal (amorphous) magnetic materials.

A primary object of the invention regards lamination and cutting of magnetic material to parts with profiles required for production magnetic circuits of rotating electric machines and using invented methods to existing and to new construction of electric machines.

Amorphous magnetic materials, also known as non crystal magnetic materials or magnetic glasses, are currently produced by Allied Corporation in US and Japan, by and Vacuumschmelze GMBH in Germany. They are made as a very thin (0.017 to 0.05 mm), one side oxidised ribbon, according to the United States Patent No. 4,298,382.

Their core losses are ten times lower than conventional silicon steel and they are the best for application to cores of electric machines (motors, generators and transformers) [2]. These materials are generally known as Metglas.

At the ribbon stage amorphous materials are not suitable to produce stacked core of transformers and electric rotating machines. Ribbons of amorphous materials are compacted to wound cores or to strips. They could be hot compacted according to US

Patent No. 4,529,458 by the method of pressure and thermal diffusion.

Hot compacted strips are known as Powercore strips. The Powercore strips are very thin (0.2 mm) and extremely brittle. They are cut on 90 and 45 degree only. [4]

Due to reduction of eddy current, process of production standard electric machines from silicon steel requires, assembling the cores from thin (0.3 to 0.5 mm) singular cut strips.

Such technology is not required to produce cores from amorphous magnetic materials. Amorphous materials are produced as very thin 0.017 to 0.035 mm ribbon with resistivity from 123 to 142 (u-ohm-cm), therefore eddy current in singular ribbon are reduced almost to zero. Insulation of a adhesive material and of the oxidise of the ribbon prevent to spread eddy current in laminated strips.

Ribbons were bonded by special adhesive material. Ardalite F with Hardener 905 made by Ciba Geigy were found as the best materials for lamination these ribbons to magnetic cores of electric rotating machines. Glue is spread between ribbons of the compacted material. Total stack is compressed and baked below recrystalisation temperature.

Cores are very rigid and brittle with lamination factor higher than 0.825. They are easy for handling and assembling.

Amorphous materials are extremely hard (800 to 1100 in Vickers Scale) and it was a main reason which prevented them from using it as a magnetic circuits in electric rotating machines. Standard cutting methods, for example the guillotine or blank die are not suitable for cutting amorphous materials. The material is mechanically stressed and cracks. Laser and EDM cutting methods melt the amorphous material and cause of undesirable crystallization.

Additionally, these methods make undesirable connection between separated amorphous ribbons in laminated plates, strips and cores. These connections cause of eddy current and additional losses of energy.

Australian Patent No. 623981 gives method of cutting amorphous materials, on a various shapes, in ambient temperature without cracking, melting and undesirable crystallization and without connections between separated amorphous ribbons in laminated plates, strips and cores.

Method described in PCT/AU 95/00048 patent application gives 3 dimensional method of cutting completely assembled cores of electric machines, by inclining cutting head or inclining cutting material. The invention regards to methods of producing electric rotating machines on disk construction. As example was considered core of asynchronous disk motor currently produced by Fishbach GMBH in Germany. Stator and rotor of such machines are wound from singular ribbon. Skewed slots are cut before wound of cores. The construction of magnetic cores of Fishbach's motors is schematically shown on figure 1. Slots (2) were cut on one side of magnetic core (1). Machines could be collected with two or more stators and rotors. New method of production disk machines is presented below. Cores of stators and rotors are wound before cutting its slots. Each layer are bonded together by adhesive non gas producing material. Completely assembled cores are cut using 3 dimensional cutting method described in PCT/AU 95/00048 patent application I n case of using amorphous material eg. Metglas ribbons are bonded by Ardalite F and Hardener 904 produced by Ciba Geigy.

General view of the modular machine is presented on figure 2 and described as follows : (1) rotor or rotors, (2) stator or stators, (3) draft shaft. Rotors and stators are based on wound core. They are made from silicon steel and/or from amorphous material. Skewed slots are cut on a a one and/or both sides of cores. Teeth of core presented on figure 1 have not the same area of its cross section and triangle longitudinal section. They are cause of undesirable saturation of magnetic density in teeth and non uniform magnetic density in the air gap of the machine. The invention presents construction cores of rotating electric machines where above disadvantages do not exist. To assist with understanding this invention reference will be made to accompanying with the drawings.

Figure 1 presents core made by conventional cutting method. Figure 3 presents core that was cut after assembling the core. Skewed slots (1) have the same cross section area and its teeth (2) have the same cross section area and the same profile. Longitudinal teeth sections are rectangular. Air gap (3) has not to be placed perpendicularly to the rotating axle. Such placement makes bigger active machine length and reduce copper losses. Machine has bigger power and efficiency. Figure 4 presents two shapes cross section shapes of such rotating machines. Teeth have rectangular profiles in both cases.

Reduction weight of modular electric machines.

Figure 5 presents machine with two double side skewed stator (1), assembled on the common draft (3) shaft with two rotors (2). In each separated machine lines of magnetic flux is shown on figure 6 curve 1.

The machine can be wound by any required electrical winding, as DC, AC single or 3 phase. The machine contains more than one stators and rotors assembled on a common draft shaft is named "Modular Electric Machine". When electrical winding of two adjacent stators, or rotors are rotated by 180 electrical degree as shown on figure 7 a value of the magnetic flux in the middle joke (eg. joke of stator) is equal zero. Such lines of magnetic flux are shown on figure 7 as curves 2 Construction of the machine after joke reduction is shown on figures 8 and 9. Line of magnetic flux is shown as curve 3. The method was successfully found in construction cores of 3 phases 3 kW modular amorphous motor contains two stator and two rotors. Small yoke in stator was left only due to mechanical construction. Weight of cores were reduced to about 70°_. After using more stators and rotors in construction the modular machine, the machine's cores weight is reduced to the its teeth plus two outside yokes practically. Teeth weight do not exceed 40 % of the total core weight, therefore weight of the modular machines are reduced to 45 - 50 % in comparison with other electric machines.

Length of magnetic field in the modular yokels machines is much shorter as shown on figures 7 and 8, therefore they have higher saturation factor and requires lower magnetisation current They have higher power factor and they are more efficient. Above method is suitable for any electric rotating machine based on disk cores.

Claims

Claims
1. Cutting required profiles in electric rotating machines based on wound core have to be made by method of inclining jet cutting with high pressure liquid as presented with Australian patent 632981 and patent application PCT
2. Rectangular cross section area teeth of stator's and rotor's core is achieved by method of 3 dimensional inclining high pressure liquid jet cutting.
3. Electric machines based on wound cores assembled with more than one stator and one rotor have to have rotate on 180 electrical degree its electrical winding on adjacent stators and/or rotors.
PCT/AU1995/000294 1994-05-13 1995-05-16 Modular electric machines WO1995033596A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AUPM5594 1994-05-13
AUPM5594A AUPM559494A0 (en) 1994-05-13 1994-05-13 Modular electric motor
AUPM9081 1994-10-28
AUPM9081A AUPM908194A0 (en) 1994-10-28 1994-10-28 Method of cutting with inclining jet
AUPN0567 1995-01-15
AUPN0567A AUPN056795A0 (en) 1995-01-17 1995-01-17 Ultra light rotating electric machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU24407/95A AU2440795A (en) 1994-05-13 1995-05-16 Modular electric machines

Publications (1)

Publication Number Publication Date
WO1995033596A1 true WO1995033596A1 (en) 1995-12-14

Family

ID=27157785

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1995/000294 WO1995033596A1 (en) 1994-05-13 1995-05-16 Modular electric machines

Country Status (2)

Country Link
AU (1) AU2440795A (en)
WO (1) WO1995033596A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6331363B1 (en) 1998-11-06 2001-12-18 Honeywell International Inc. Bulk amorphous metal magnetic components
US6346337B1 (en) 1998-11-06 2002-02-12 Honeywell International Inc. Bulk amorphous metal magnetic component
US6348275B1 (en) 1998-11-06 2002-02-19 Honeywell International Inc. Bulk amorphous metal magnetic component
US6552639B2 (en) 2000-04-28 2003-04-22 Honeywell International Inc. Bulk stamped amorphous metal magnetic component
US6737951B1 (en) 2002-11-01 2004-05-18 Metglas, Inc. Bulk amorphous metal inductive device
US6873239B2 (en) 2002-11-01 2005-03-29 Metglas Inc. Bulk laminated amorphous metal inductive device
US7235910B2 (en) 2003-04-25 2007-06-26 Metglas, Inc. Selective etching process for cutting amorphous metal shapes and components made thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618616A1 (en) * 1987-07-20 1989-01-27 Sobiepanek Janusz Electric machine with high drive and/or positioning torque
AU7354191A (en) * 1990-03-16 1991-09-19 Satake Engineering Co. Ltd. Two-stator induction synchronous motor
AU7729791A (en) * 1990-05-26 1991-11-28 Satake Engineering Co. Ltd. Dual-stator induction synchronous motor
AU8966891A (en) * 1990-12-17 1993-01-14 Global Future Energy Pty Ltd
AU2093592A (en) * 1991-08-28 1993-03-04 Satake Corporation Brushless induction synchronous motor with two stators
AU1571495A (en) * 1994-02-01 1995-08-21 Global Future Energy Pty Ltd Cutting cores from amorphous material by non corrosive liquids and abrasives

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618616A1 (en) * 1987-07-20 1989-01-27 Sobiepanek Janusz Electric machine with high drive and/or positioning torque
AU7354191A (en) * 1990-03-16 1991-09-19 Satake Engineering Co. Ltd. Two-stator induction synchronous motor
AU7729791A (en) * 1990-05-26 1991-11-28 Satake Engineering Co. Ltd. Dual-stator induction synchronous motor
AU8966891A (en) * 1990-12-17 1993-01-14 Global Future Energy Pty Ltd
AU2093592A (en) * 1991-08-28 1993-03-04 Satake Corporation Brushless induction synchronous motor with two stators
AU1571495A (en) * 1994-02-01 1995-08-21 Global Future Energy Pty Ltd Cutting cores from amorphous material by non corrosive liquids and abrasives

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6331363B1 (en) 1998-11-06 2001-12-18 Honeywell International Inc. Bulk amorphous metal magnetic components
US6346337B1 (en) 1998-11-06 2002-02-12 Honeywell International Inc. Bulk amorphous metal magnetic component
US6348275B1 (en) 1998-11-06 2002-02-19 Honeywell International Inc. Bulk amorphous metal magnetic component
US6552639B2 (en) 2000-04-28 2003-04-22 Honeywell International Inc. Bulk stamped amorphous metal magnetic component
US6737951B1 (en) 2002-11-01 2004-05-18 Metglas, Inc. Bulk amorphous metal inductive device
US6873239B2 (en) 2002-11-01 2005-03-29 Metglas Inc. Bulk laminated amorphous metal inductive device
US7289013B2 (en) 2002-11-01 2007-10-30 Metglas, Inc. Bulk amorphous metal inductive device
US7235910B2 (en) 2003-04-25 2007-06-26 Metglas, Inc. Selective etching process for cutting amorphous metal shapes and components made thereof

Also Published As

Publication number Publication date
AU2440795A (en) 1996-01-04

Similar Documents

Publication Publication Date Title
US7124495B2 (en) Method for making an electric motor
CN1864312B (en) Selective etching process for cutting amorphous metal shapes and components made thereof
CA2337042C (en) Stator with teeth formed from a soft magnetic powder material
US4500142A (en) Magnetic suspension device of a rotor placed in a sealed enclosure
JP3355700B2 (en) Rotating electric machine stator
US7973446B2 (en) Electrical devices having tape wound core laminate rotor or stator elements
US7265472B2 (en) Magnetic coils for electrical machines
US3296471A (en) Dynamoelectric machine
US7626304B2 (en) Stator and motor, to which the stator is applied, and method of manufacturing the stator
US7626301B2 (en) Electric rotating machine having permanent magnets and method of manufacturing teeth portions of the stator iron core
CA2514958C (en) Efficient high-speed electric device using low-loss materials
US6933646B2 (en) Electric rotating machine and electromagnetic machine and apparatus
US6809453B2 (en) Induction motor
JP3431991B2 (en) Synchronous motor
EP1153470B1 (en) Brushless doubly-fed induction machines employing dual cage rotors
JP3793574B2 (en) Synchronous motor using permanent magnet
EP1364442B1 (en) Motor with divided stator having bonded laminations
US6300702B1 (en) Electrical machine element
CN101741153B (en) Armature core, motor and axial gap electrical rotating machine using same and method for making same
EP1540793B1 (en) Method of constructing a unitary amorphous metal component for an electric machine
KR101023044B1 (en) Efficient high-speed electric device using low-loss materials
US6552462B2 (en) Reluctance type rotating machine with permanent magnets
JP2013039030A (en) Amorphous metal stator for radial-flux electric motor
US6509819B2 (en) Rotor assembly including superconducting magnetic coil
KR100807853B1 (en) A dynamoelectric machine

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA CZ DE JP KR MX PL US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: CA