US20060066153A1 - Synchronous machines - Google Patents

Synchronous machines Download PDF

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Publication number
US20060066153A1
US20060066153A1 US11/229,754 US22975405A US2006066153A1 US 20060066153 A1 US20060066153 A1 US 20060066153A1 US 22975405 A US22975405 A US 22975405A US 2006066153 A1 US2006066153 A1 US 2006066153A1
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US
United States
Prior art keywords
synchronous machine
machine according
magnetized synchronous
electrically
means
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Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/229,754
Inventor
Mats Klercker Alakula
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Forskarpatent i Syd AB
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Forskarpatent i Syd AB
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Filing date
Publication date
Priority to SE0300757A priority Critical patent/SE526270C2/en
Priority to SE0300757-2 priority
Priority to PCT/SE2004/000396 priority patent/WO2004084385A1/en
Application filed by Forskarpatent i Syd AB filed Critical Forskarpatent i Syd AB
Assigned to FORSKARPATENT I SYD AB reassignment FORSKARPATENT I SYD AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALAKULA, MATS AF KLERCKER
Publication of US20060066153A1 publication Critical patent/US20060066153A1/en
Assigned to FORSKARPATENT I SYD AB reassignment FORSKARPATENT I SYD AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KLERCKER ALAKULA, MATS A F
Application status is Abandoned legal-status Critical

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K19/00Synchronous motors or generators
    • H02K19/16Synchronous generators
    • H02K19/26Synchronous generators characterised by the arrangement of exciting windings
    • H02K19/28Synchronous generators characterised by the arrangement of exciting windings for self-excitation
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K19/00Synchronous motors or generators
    • H02K19/02Synchronous motors
    • H02K19/10Synchronous motors for multi-phase current
    • H02K19/12Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing

Abstract

The present invention relates to a novel isolated and purified alkaline protease from Nesterenkonia sp. nov. strain, having the following characteristics: molecular weight of 23 kilodalton, melting temperature of about 74° C. at pH 7-10, calcium independent for activity and stability, maximal protease activity at pH10,
  • and being a serine protease, as well as a composition comprising the enzyme, method for producing the enzyme, method of degrading proteinaceous material, an isolated strain Nesterenkonia sp. nov.

Description

    TECHNICAL FIELD
  • The present invention relates to synchronous machines, and in particular to series magnetization of synchronous machines.
  • BACKGROUND OF THE INVENTION
  • Permanent magnet synchronous machines (PMSM) are getting increasingly more popular due to their high torque and power density. The main drawbacks are the magnet price, the difficulties with field weakening, and possibly the assembly/disassembly that is somewhat difficult due to high forces emanating from the magnets.
  • Another problem is that the metals used in alloys for producing permanent magnets are a restricted nature resource, and from a global environmental point of view there is a requirement for less use of such metals, as there is no endless source thereof.
  • Electrically magnetized synchronous machines (EMSM) have almost the same properties as permanent magnet synchronous machines. However, one drawback thereof is the need for a field winding in the rotor, and a corresponding power supply and slip rings or rotary transformer plus rectifier to deal with the magnetization. An advantage using electrically magnetized synchronous machines compared to permanent magnet synchronous machines is the ease of carrying out field weakening.
  • SUMMARY OF THE INVENTION
  • The present invention is based on the concept of connecting a non-linear means, optionally controllable, such as rectifying means, in series with the three stator phase windings of an electrically magnetized synchronous machine and to feed the field winding from the non-linear means.
  • By doing so the field current will always become equal to the largest modulus of the three phase currents and being independent of the phase angle of the phase currents.
  • This provides for further advantages to the electrically magnetized synchronous machine, such as that no additional power supply is needed for the field winding, and
  • that the electrically magnetized synchronous machine will obtain permanent magnet synchronous machine properties but with variable magnetization.
  • Another advantage is that cos φ, i.e., the phase displacement, can be held equal to or about 1, i.e., no or substantially no phase displacement, which minimizes the load on any power electronics.
  • In order to distinguish the present construction from prior electrically magnetized synchronous machine and permanent magnet synchronous machine the novel construction has been named SMSM—series magnetized synchronous machine.
  • The present invention has been theoretically and experimentally studied. Thereby it turned out to work well, also in combination with a field oriented control.
  • The invention will now be described more in detail with reference to the accompanying drawings, however, without being restricted thereto.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows the principles of a permanent magnet synchronous machine, (prior art)
  • FIG. 2 shows the principle of an electrically magnetized synchronous machine, (prior art),
  • FIG. 3 shows the series magnetized synchronous machine according to the present invention,
  • DETAILED DESCRIPTION OF THE INVENTION
  • In FIG. 1 showing the prior art PMSM, the permanent magnet connected to the outgoing shaft of the machine, is symbolized by an N-S marked rotor, and the stator windings are shown with symbolized winding and the stator currents are denoted ia, ib, and ic, respectively, together with their respective voltages ua, u b, and uc, respectively. In the PMSM a current is only applied to the stator, and there is no need for transfer of current to the rotor, the function of the field winding is supplied by permanently magnetic material.
  • In FIG. 2 the electrically magnetized rotor connected to the outgoing shaft is shown with a symbolized winding. The stator windings with symbolized winding and the stator currents are denoted ia, ib, and ic, respectively, together with their respective voltages ua, ub, and uc, respectively. The angle θ is given between the phase and the axis of the rotor. In the EMSM a current is applied to the stator, as well as to the field winding via a separate electric line being fed via slip rings.
  • FIG. 3 shows the circuit for providing an electric magnetization with current according to the present invention. The different stator windings are denoted a, b, and c,
  • respectively. As seen in the circuit drawing there is a rectifier 1 a, 1 b; 2 a, 2 b; and 3 a, 3 b in series with each of the windings a, b, and c, which thereby feed the field of the rotor winding phasewise via slip rings 4, and 5. Between each line a to b, a to c and b to c there are capacitors 6, 7, and 8 inserted, which capacitors, in a preferred embodiment, work for reducing the field current at high frequencies/revolutions.
  • The field winding voltage is of the same order of magnitude as the stator winding resistive voltage drop in a PMSM, thus only a small fraction of the supply voltage, expressed as phase- or phase-to-phase voltage in rated operation.
  • The field current is dependent on the transfer of energy to the field winding. The transfer is can take place via slip rings 4, and 5. The slip rings 4 and 5 may be replaced by any other means for transferring current to the field winding. An alternative is to supply the field to the rotor via magnetic “sliprings” from a field source that is stationary with respect to the rotor, thus avoiding electric sliprings.
  • A further capacitor 9, such as an electrolyte capacitor, can be placed in parallel with the field winding. The capacitors 6, 7, and 8, connected in star or delta, can replace capacitor 9, or vice verse, or they can be working simultaneously.
  • It is not only the active stator current of the machine that passes the non-linear means, but also the reactive stator current passes the non-linear means and the field windings. This provides for several different opportunities of controlling the operation of the machine.
  • The present invention can thereby be used with a field-oriented control, direct torque control, vector control or rotor oriented control-to-control currents, magnetic flux linkages, torque, speed or position of the machine.
  • Rectifiers of different types can be used, such as a diode, such as a silicon diode, a semiconductor, a selenium rectifier, a thyristor—often a silicon-controlled rectifier or another pnpn device, a thyratron—a gas filled relay, a transistor rectifier, a mercury-vapour rectifier, a metal rectifier, and a mechanical rectifier.
  • The synchronous machines of the present invention can be used for the same applications as PM-synchronous machines, and EM-synchronous machines. Such applications are e.g., in industrial robots, or air conditioning equipments. The machine can also be used as a generator for the generation of electrical power, particularly for variable frequency derived power.
  • The present machine can be run on pure net AC current, such as 3-phase 400 V net, but is preferably operated via a power electronic control.
  • The SMSM can thereby be run on any AC independent on form, such as modified sinus.
  • The present machine provides a better efficiency than a comparable asynchronous machine and is comparable to the PMSM.
  • The SM synchronous machine has also turned out to have an effect density comparable to the PMSM.
  • The SMSM can be construed for the same voltages and effect needs as any PMSM or asynchronous machine (AM).

Claims (17)

1. An electrically magnetized synchronous machine comprising an electrically magnetized rotor, and electricity supplied stator windings, wherein it further comprises a non-linear means, optionally controllable, in series with three stator phase windings, whereby a rotor field winding is arranged to be fed from said non-linear means to from a series magnetized synchronous machine.
2. An electrically magnetized synchronous machine according to claim 1, wherein the non-linear means is rectifying means.
3. An electrically magnetized synchronous machine according to claim 2, wherein the rectifying means is a semiconductor rectifier.
4. An electrically magnetized synchronous machine according to claim 2, wherein the rectifying means is a diode rectifier.
5. An electrically magnetized synchronous machine according to claim 2, wherein the rectifying means is a thyristor rectifier.
6. An electrically magnetized synchronous machine according to claim 2, wherein the rectifying means is a transistor rectifier.
7. An electrically magnetized synchronous machine according to claim 2, wherein the rectifying means is a thyratrone rectifier.
8. An electrically magnetized synchronous machine according to claim 1, wherein the rotor field winding is fed via slip rings.
9. An electrically magnetized synchronous machine according to claim 1, wherein the rotor field winding is fed by means of a flux via magnetic slip rings.
10. An electrically magnetized synchronous machine according to claim 1, wherein the series magnetized synchronous machine is controlled by means of a field oriented control.
11. An electrically magnetized synchronous machine according to claim 1, wherein the series magnetized synchronous machine is controlled by means of a rotor oriented vector control.
12. An electrically magnetized synchronous machine according to claim 1, wherein the series magnetized synchronous machine is controlled by means of a vector control.
13. An electrically magnetized synchronous machine according to claim 1, wherein the series magnetized synchronous machine is controlled by means of a direct torque control.
14. An automotive starter motor comprising an electrically magnetized synchronous machine according to claim 1.
15. An automotive generator comprising an electrically magnetized synchronous machine according to claim 1.
16. An industrial robot motor comprising an electrically magnetized synchronous machine according to claim 1.
17. An air conditioning equipment comprising an electrically magnetized synchronous machine according to claim 1.
US11/229,754 2003-03-19 2005-09-19 Synchronous machines Abandoned US20060066153A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE0300757A SE526270C2 (en) 2003-03-19 2003-03-19 Series excitation of synchronous motors
SE0300757-2 2003-03-19
PCT/SE2004/000396 WO2004084385A1 (en) 2003-03-19 2004-03-17 Synchronous machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/103,917 US7663334B2 (en) 2003-03-19 2008-04-16 Synchronous machines

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2004/000396 Continuation WO2004084385A1 (en) 2003-03-19 2004-03-17 Synchronous machines

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/103,917 Continuation US7663334B2 (en) 2003-03-19 2008-04-16 Synchronous machines

Publications (1)

Publication Number Publication Date
US20060066153A1 true US20060066153A1 (en) 2006-03-30

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ID=20290723

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US11/229,754 Abandoned US20060066153A1 (en) 2003-03-19 2005-09-19 Synchronous machines
US12/103,917 Expired - Fee Related US7663334B2 (en) 2003-03-19 2008-04-16 Synchronous machines

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/103,917 Expired - Fee Related US7663334B2 (en) 2003-03-19 2008-04-16 Synchronous machines

Country Status (5)

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US (2) US20060066153A1 (en)
EP (1) EP1611661A1 (en)
JP (1) JP2006521080A (en)
SE (1) SE526270C2 (en)
WO (1) WO2004084385A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160276912A1 (en) * 2015-03-16 2016-09-22 Foster-Miller, Inc. Series-wound heteropolar inductor motor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4775465B2 (en) 2009-03-17 2011-09-21 株式会社豊田中央研究所 Driving of the rotary electric machine
JP6369309B2 (en) * 2014-12-03 2018-08-08 スズキ株式会社 The rotary electric machine
RU169097U1 (en) * 2016-05-24 2017-03-03 Константин Владимирович Лицин Apparatus vector-pulse start synchronous machine field winding
JP2018117398A (en) * 2017-01-16 2018-07-26 梨木 政行 Motor and controller for the same

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US3612970A (en) * 1970-08-31 1971-10-12 Mini Ind Constructillor Automatic-control system for the angular speed of a synchronous motor
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US3757182A (en) * 1970-12-11 1973-09-04 Nat Res Dev Synchronous electrical machines
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US6847186B1 (en) * 2002-10-18 2005-01-25 Raser Technologies, Inc. Resonant motor system
US7030583B2 (en) * 2003-10-08 2006-04-18 Mineba Co., Ltd Method for the commutation of brushless direct current motor
US7358698B2 (en) * 2005-06-28 2008-04-15 Denso Corporation Field-winding type of synchronous machine
US7411363B2 (en) * 2006-06-26 2008-08-12 Lam Dat D Conservation of electrical energy and electro-magnetic power in motor, generator, and product components
US7508086B2 (en) * 2006-03-24 2009-03-24 General Electric Company Aircraft engine starter/generator and controller

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582736A (en) * 1967-12-13 1971-06-01 Ideal Electric Mfg Co Brushless synchronous motor control system
US3612970A (en) * 1970-08-31 1971-10-12 Mini Ind Constructillor Automatic-control system for the angular speed of a synchronous motor
US3863122A (en) * 1970-10-20 1975-01-28 Litton Industrial Products Control means for controlling the output condition of an alternating current induction motor
US3678352A (en) * 1970-11-06 1972-07-18 Gen Electric Compatible permanent magnet or reluctance brushless motors and controlled switch circuits
US3757182A (en) * 1970-12-11 1973-09-04 Nat Res Dev Synchronous electrical machines
US3769564A (en) * 1972-08-30 1973-10-30 Allis Louis Co Method and means for limiting the maximum horsepower output of a self-excited alternating current motor
US3911339A (en) * 1973-03-02 1975-10-07 Litton Industrial Products Method for controlling the output condition of a synchronous reluctance motor
US3997825A (en) * 1973-10-12 1976-12-14 Hitachi, Ltd. Method and apparatus for controlling synchronous motor
US4012679A (en) * 1974-01-06 1977-03-15 Hitachi, Ltd. Method and apparatus for controlling the operation of synchronous motor
US4161680A (en) * 1976-11-02 1979-07-17 Mitsubishi Denki Kabushiki Kaisha AC rotary machine apparatus
US4114073A (en) * 1976-11-19 1978-09-12 Sony Corporation Brushless motor driving circuit
US4677365A (en) * 1984-09-06 1987-06-30 Yang Tai Her Automotive charging system having generator with multiple windings and regulators
US4695939A (en) * 1985-07-04 1987-09-22 Bbc Brown, Boveri & Company, Limited Three-phase exciter for synchronous machines
US4988273A (en) * 1989-06-23 1991-01-29 Cincinnati Milacron Inc. Injection molding machines having a brushless DC drive system
US5012148A (en) * 1989-09-14 1991-04-30 Joseph Vithayathil AC machine system with induced DC field
US5365153A (en) * 1992-06-10 1994-11-15 Fuji Electric Co., Ltd. AC variable speed driving apparatus and electric vehicle using the same
US5418446A (en) * 1993-05-10 1995-05-23 Hallidy; William M. Variable speed constant frequency synchronous electric power generating system and method of using same
US5933573A (en) * 1995-04-22 1999-08-03 Papst-Motoren Gmbh & Co. Kg Method of controlling an electric motor and apparatus for carrying out the method
US5770909A (en) * 1996-12-13 1998-06-23 Rosen Motors, L.P. Wound rotor synchronous motor-generator and field control system therefor
US6051951A (en) * 1997-02-20 2000-04-18 Honda Giken Kogyo Kabushiki Kaisha Generator motor for internal combustion engine
US6118247A (en) * 1998-04-28 2000-09-12 Denso Corporation Drive control apparatus for electric synchronous machine having field winding
US6051953A (en) * 1998-07-24 2000-04-18 Vithayathil; Joseph Brushless exciterless field system for AC synchronous machines
US6188196B1 (en) * 1998-12-18 2001-02-13 Toyota Jidosha Kabushiki Kaisha Electrical angle detecting apparatus and method, and motor control apparatus
US6775524B2 (en) * 1999-05-21 2004-08-10 Fujitsu Limited Signal transmitting apparatus
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US6713888B2 (en) * 2000-12-19 2004-03-30 Denso Corporation Vehicle motor-generator apparatus utilizing synchronous machine having field winding
US6636788B2 (en) * 2001-04-04 2003-10-21 Honda Giken Kogyo Kabushiki Kaisha Control apparatus for electric motor and control apparatus for hybrid vehicle
US6847186B1 (en) * 2002-10-18 2005-01-25 Raser Technologies, Inc. Resonant motor system
US7030583B2 (en) * 2003-10-08 2006-04-18 Mineba Co., Ltd Method for the commutation of brushless direct current motor
US7358698B2 (en) * 2005-06-28 2008-04-15 Denso Corporation Field-winding type of synchronous machine
US7508086B2 (en) * 2006-03-24 2009-03-24 General Electric Company Aircraft engine starter/generator and controller
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160276912A1 (en) * 2015-03-16 2016-09-22 Foster-Miller, Inc. Series-wound heteropolar inductor motor
US10075051B2 (en) * 2015-03-16 2018-09-11 Foster-Miller, Inc. Series-wound heteropolar inductor motor

Also Published As

Publication number Publication date
SE0300757A (en) 2004-09-20
SE526270C2 (en) 2005-08-09
US7663334B2 (en) 2010-02-16
WO2004084385A1 (en) 2004-09-30
JP2006521080A (en) 2006-09-14
SE0300757D0 (en) 2003-03-19
US20080211448A1 (en) 2008-09-04
EP1611661A1 (en) 2006-01-04

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALAKULA, MATS AF KLERCKER;REEL/FRAME:017323/0811

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