EP2430730A2 - Système d'entraînement électrique - Google Patents

Système d'entraînement électrique

Info

Publication number
EP2430730A2
EP2430730A2 EP10714259A EP10714259A EP2430730A2 EP 2430730 A2 EP2430730 A2 EP 2430730A2 EP 10714259 A EP10714259 A EP 10714259A EP 10714259 A EP10714259 A EP 10714259A EP 2430730 A2 EP2430730 A2 EP 2430730A2
Authority
EP
European Patent Office
Prior art keywords
drive system
cooling
electric machine
stator winding
pump
Prior art date
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.)
Withdrawn
Application number
EP10714259A
Other languages
German (de)
English (en)
Inventor
Marcel Buse
Söhnke FRÜCHTENICHT
Gaston Mathijssen
Etienne Meier
Axel MÖHLE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2430730A2 publication Critical patent/EP2430730A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H02K15/125—Heating or drying of machines in operational state, e.g. standstill heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing

Definitions

  • the invention relates to a drive system with a liquid keitsgekühlten electric machine and a method for liquid cooling of the stator winding of such a machine.
  • the winding of the stator must be cooled with a medium to avoid inadmissibly high operating temperatures.
  • air is used as the cooling medium.
  • oil in particular an insulating oil, is frequently used as the cooling liquid.
  • the pump circulates the cooling liquid in the closed cooling circuit comprising the engine and a heat exchanger.
  • an electrical machine and thus also the insulating oil used for its cooling can be exposed to very low ambient temperatures.
  • electric machines are used to drive compressors that serve the extraction, transport and processing of natural gas.
  • Compressors for the oil and gas market are often used in extreme locations such as the Arctic or on the seabed (subsea). It is obvious that even the electric machines that drive the compressor used can be exposed to extremely low temperatures.
  • the object of the invention is to enable the use of liquid-cooled dynamoelectric machines at very low ambient temperatures with as little effort as possible.
  • an electric drive system with an electric machine, a cooling circuit for liquid cooling a stator winding of the electric machine, a pump for pumping a cooling liquid through the
  • Cooling circuit a converter for supplying the stator winding and a control device for controlling the inverter such that this before switching on the pump a
  • Common variable-speed drives are usually powered by a converter.
  • This converter usually comprises an input rectifier which converts a line-side AC voltage into a DC link voltage or a network-side DC link Converts AC power into a DC link DC power, and an inverter that applies the DC link DC voltage or the DC link DC current to the electric machine or impressed in the electric machine.
  • the inverter is in this case controlled by a control device such that the electrical variable generated by it generates a predetermined engine speed or a predetermined engine torque.
  • the control device comprises a controller which calculates a setpoint current to be impressed into the stator winding from a deviation of a speed setpoint from an actual speed value and predefines corresponding switching signals for the power semiconductors of the inverter.
  • the invention is based on the finding that the components described control unit, inverter and
  • the stator winding can also be used for heating the cooling liquid. In this way, an external heater for warming up the cooling liquid can be saved. This can reduce the cost of the electric drive unit and minimize their volume.
  • To provide the cooling liquid sufficiently low viscosity only a corresponding heating current is fed from the inverter in the stator winding, which bring the cooling liquid, which is provided to cool the stator winding, to a required temperature. Only when this threshold temperature is exceeded, the cooling liquid is sufficiently low viscosity to be circulated by the pump in the cooling circuit.
  • the heating current in an advantageous embodiment of the invention is a direct current.
  • a direct current impressed into the stator winding a static magnetic field is generated in the air gap of the electric machine, by means of which the rotor of the machine is not driven.
  • the use of a direct current also has the advantage that no eddy current and hysteresis losses can be generated in the rotor of the machine.
  • the heating current is an alternating current through which an alternating field is generated in an air gap of the electric machine.
  • the heating current is an alternating current through which an alternating field is generated in an air gap of the electric machine.
  • commissioning of the electric drive system at low ambient temperatures can be largely automated by virtue of the fact that the electrical operating system has measuring means for detecting a measured variable characterizing the viscosity of the cooling liquid, wherein the control device generates a switch-on command for the pump. Forming a viscosity threshold is formed. In this case, the viscosity of the cooling liquid is continuously monitored when switching on the electric drive system. This can also be done, for example, by a temperature measurement of the cooling liquid, since the temperature of the cooling liquid allows a conclusion as to its viscosity. Once it is determined by the controller that the viscosity is sufficiently low to allow circulation of the coolant through the pump, a corresponding turn-on signal is sent to the pump by the controller.
  • control device is designed so that it automatically controls the inverter for feeding a three-phase current driving the electric machine from below the Viskosticiansschwellagonists.
  • the complete switch-on of the electric drive system from the heating of the cooling liquid to the startup of the electric motor is automated.
  • 1 shows a schematic representation of an embodiment of the electric drive system according to the invention and 2 shows a motor-compressor unit according to an embodiment of the invention.
  • FIG. 1 shows a schematic representation of an embodiment of the electric drive system according to the invention.
  • the central component of this electric drive system is an electric machine 1, which has a liquid-cooled stator winding.
  • This stator winding is fed by a converter 4 with a three-phase current, which generates the required for driving the rotor of the electric machine 1 rotating field.
  • a control device 5 generates control commands for the power semiconductors of the converter 4. These control commands are generated as a function of a deviation of a current torque of the motor from a torque setpoint specified by the electric machine 1 by means of a suitable control algorithm.
  • the torque of the electric machine 1 can be measured or calculated from a measurement of the stator currents of the electric machine 1 and then fed to the control device 5 as an actual value.
  • An arrow pointing from the inverter 4 to the control device 5 indicates the feedback of the current stator currents, on the basis of which the control device 5 determines the torque of the electric machine 1.
  • the temperature of the cooling liquid of the electric machine 1 is detected and also coupled to the control device 5. This is also indicated by an arrow which points from the electric machine 1 to the control device 5.
  • the cooling liquid provided for cooling the stator winding which in this example is an insulating oil
  • a cooling circuit 2 which comprises a heat exchanger 8, via which the insulating oil can release its heat.
  • the pump 3 is initially switched off.
  • the electric machine 1 is still and it is still generated on no torque from the electric machine 1.
  • control commands for the power semiconductors of the converter 4 are initially generated by the control unit 5, with the result that direct currents are fed into the windings of the electric machine 1.
  • each phase of the electric machine 1 is supplied with a direct current.
  • this direct current the stator winding is heated so that they can give off their heat to the coolant.
  • the direct current is only to be chosen so high that overheating of the stator winding is avoided.
  • the temperature of the cooling liquid is monitored, the temperature of the cooling liquid can be traced to its viscosity. From a certain threshold value for the viscosity and an associated threshold value for the temperature of the cooling liquid, a switch-on command is sent to the pump 3 by the control device 5. Following this switch-on command, the pump 3 starts to circulate the cooling liquid in the cooling circuit 2.
  • the inverter 4 is switched from the DC operation to the AC operation, so that the stator windings of the electric machine 1 are supplied with a three-phase current that generates the rotating field required to drive the electric machine 1.
  • the electric drive system described here allows the use of a liquid-cooled electric motor under extreme operating conditions, in which according to the prior art, an additional heating device for heating the coolant was needed.
  • the described system has almost no additional hardware components and can thus be realized in a particularly cost-effective and compact manner.
  • 2 shows a motor-compressor unit according to an embodiment of the invention.
  • the engine compressor unit 6 shown here is provided for compressing natural gas and suitable for use on the seabed (subsea).
  • a multi-stage compressor 7 and an electric machine suitable for its drive with a stator 9 and a rotor 10 are arranged.
  • the stator 9 is liquid-cooled.
  • the cooling liquid used is an insulating oil which tends to have very high viscosities at the low ambient temperatures prevailing in the subsea application. So that the insulating oil can be pumped by a circulating pump, not shown here, through the cooling system, it is first, as already described in FIG 1, heated with the aid of an impressed in the stator windings DC or AC current to a temperature at which it is sufficiently low-viscosity. An additional heating system is not required for this.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne un système d'entraînement comportant un moteur électrique (1) refroidi par liquide, et un procédé de refroidissement par liquide de l'enroulement de stator d'un tel moteur (1). Pour permettre avec des moyens simples une utilisation à des températures ambiantes très basses, le système d'entraînement comporte également un circuit de refroidissement (2) pour refroidir par liquide l'enroulement de stator du moteur électrique (1), une pompe (3) pour pomper un liquide de refroidissement à travers le circuit de refroidissement (2), un convertisseur (4) pour alimenter l'enroulement de stator, et un dispositif de commande (5) pour commander le convertisseur de telle manière que celui-ci applique, avant mise en marche de la pompe (3), un courant de chauffe à l'enroulement de stator pour chauffer le liquide de refroidissement.
EP10714259A 2009-05-13 2010-04-15 Système d'entraînement électrique Withdrawn EP2430730A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009021098A DE102009021098A1 (de) 2009-05-13 2009-05-13 Elektrisches Antriebssystem
PCT/EP2010/054975 WO2010130523A2 (fr) 2009-05-13 2010-04-15 Système d'entraînement électrique

Publications (1)

Publication Number Publication Date
EP2430730A2 true EP2430730A2 (fr) 2012-03-21

Family

ID=42979083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10714259A Withdrawn EP2430730A2 (fr) 2009-05-13 2010-04-15 Système d'entraînement électrique

Country Status (7)

Country Link
US (1) US20120056571A1 (fr)
EP (1) EP2430730A2 (fr)
CN (1) CN102498643A (fr)
BR (1) BRPI1012855A2 (fr)
DE (1) DE102009021098A1 (fr)
RU (1) RU2011150492A (fr)
WO (1) WO2010130523A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009031371B4 (de) 2009-07-01 2011-05-26 Siemens Aktiengesellschaft Läufer und Verfahren zur Herstellung eines Läufers einer elektrischen Maschine
DK2508749T3 (da) 2011-04-04 2013-12-16 Siemens Ag Fremgangsmåde til montering af en elektrisk maskine
US10302340B2 (en) * 2015-03-11 2019-05-28 Emerson Climate Technologies, Inc. Compressor having lubricant management system for bearing life
EP3112826A1 (fr) * 2015-07-02 2017-01-04 Siemens Aktiengesellschaft Procede et convertisseur destines a localiser une machine electrique raccordee a un convertisseur ou a identifier un convertisseur raccorde a la machine electrique
DE102015219870A1 (de) * 2015-10-14 2017-04-20 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben einer Asynchronmaschine eines Aggregats sowie Antriebsstrang für ein Kraftfahrzeug
JP2017225264A (ja) * 2016-06-16 2017-12-21 三菱電機株式会社 機器及び発熱構造
DE102018207007A1 (de) * 2018-05-07 2019-11-07 Audi Ag Flüssigkeitsgekühltes elektrisches Antriebssystem
DE102018209340B3 (de) * 2018-06-12 2019-04-25 Bayerische Motoren Werke Aktiengesellschaft Betriebsstrategie für einen Mehrphasensystem-Inverter einer elektrischen Antriebseinheit für ein Kraftfahrzeug
KR102067602B1 (ko) * 2018-08-20 2020-01-17 엘지전자 주식회사 리니어 압축기 및 리니어 압축기의 제어 방법

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674087A (en) * 1969-11-28 1972-07-04 Gen Motors Corp Flow process
JPS6152560A (ja) * 1984-08-22 1986-03-15 株式会社日立製作所 空気調和機
JPH0687639B2 (ja) * 1987-03-23 1994-11-02 三菱電機株式会社 深海用電動機の制御装置
CN1089426C (zh) * 1997-03-10 2002-08-21 三菱电机株式会社 制冷机控制装置
GB0216713D0 (en) * 2002-07-17 2002-08-28 Lucas Industries Ltd Heating system
JP4124205B2 (ja) * 2004-04-26 2008-07-23 ダイキン工業株式会社 インバータ駆動圧縮機の予熱運転方法およびその装置
DE102004022557B4 (de) * 2004-05-07 2021-07-22 Siemens Aktiengesellschaft Elektrische Maschine mit Wasserkühlung
US7255540B1 (en) * 2004-05-25 2007-08-14 Cooper Jerry A Natural gas processing well head pump assembly
BRPI0418882A (pt) * 2004-06-04 2007-11-27 Rapp Hydema As sistema para refrigerar um motor elétrico
WO2007110281A1 (fr) * 2006-03-24 2007-10-04 Siemens Aktiengesellschaft Unité de compression
DE102007021720B4 (de) * 2007-05-09 2014-01-23 Siemens Aktiengesellschaft Verdichtersystem für den Unterwassereinsatz im Offshore-Bereich
US8038412B2 (en) * 2007-06-06 2011-10-18 Hamilton Sundstrand Corporation Temperature management for electric motor driven pump
WO2009096923A1 (fr) * 2008-02-01 2009-08-06 Carrier Corporation Moteur de compresseur et appareil de chauffage à fluide de refroidissement/huile intégrés et procédé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010130523A2 *

Also Published As

Publication number Publication date
RU2011150492A (ru) 2013-06-20
WO2010130523A3 (fr) 2012-03-08
CN102498643A (zh) 2012-06-13
DE102009021098A1 (de) 2010-11-18
WO2010130523A2 (fr) 2010-11-18
BRPI1012855A2 (pt) 2016-04-05
US20120056571A1 (en) 2012-03-08

Similar Documents

Publication Publication Date Title
WO2010130523A2 (fr) Système d'entraînement électrique
DE102008007414B4 (de) Drehstromgenerator mit integrierter Wasserpumpe für einen Fahrzeugmotor und Verfahren zum Steuern der Drehstromgeneratortemperatur und der Motortemperatur für ein Fahrzeug
DE102014119513A1 (de) Elektromotor, Verdichter und Verfahren zum Steuern eines Elektromotors oder eines Verdichters
EP2080258B1 (fr) Machine electrique blindee avec un stator refroidi par liquide
DE102015108910A1 (de) Kühlgerät, insbesondere für die Kühlung von in einem Schaltschrank aufgenommenen Komponenten, sowie eine entsprechende Verwendung und ein entsprechendes Verfahren
DE102010035039A1 (de) Pumpe mit einem Elektromotor sowie Verfahren zum Einschalten einer derartigen Pumpe
DE102013016337A1 (de) Motorregelvorrichtung zum auswählen einer pwm-frequenz zur verwendung derselben
DE102016102738A1 (de) Motorbetriebener Kompressor
DE112014000364B4 (de) Betriebsverfahren und Antriebssystem mit variabler Frequenz zur Vermeidung von Überhitzung
EP3065271B1 (fr) Systeme destine a refroidir le liquide d'une unite de generateur de moteur electrique
DE102016102789A1 (de) Motorbetriebener Verdichter
WO2016045920A1 (fr) Procédé permettant de faire fonctionner un circuit
WO2014072341A2 (fr) Système de refroidissement pour transducteur électromécanique
WO2015188977A1 (fr) Refroidissement d'une machine électrique rotative
EP2558725A2 (fr) Pompe de refoulement électrique et procédé d'entraînement d'une telle pompe
DE10230242B4 (de) Verfahren zum Betreiben einer Gebläseeinrichtung in einem Gargerät und Gargerät zum Durchführen dieses Verfahrens
CH424827A (de) Kühleinrichtung mit Kältemaschine
EP2911276A1 (fr) Circuit de refroidissement comprenant au moins deux fluides de refroidissement pour machine électrique
EP1480327B1 (fr) Moteur électrique
DE102009039481A1 (de) Vorrichtung und Verfahren zur Anlaufstrombegrenzung
CH665512A5 (de) Oelgedichtete drehschiebervakuumpumpe mit antriebsmotor in einem gehaeuse.
DE102018201847A1 (de) Verfahren zum Erwärmen eines Elektromotors, sowie Motorsystem und Ventilator
DE102019106249A1 (de) Fahrzeuginterner motorgetriebener Kompressor und Verfahren zur Steuerung eines fahrzeuginternen motorgetriebenen Kompressors
EP3718202B1 (fr) Procédé de fonctionnement d'un système d'entraînement pour un véhicule motorisé ainsi que système d'entraînement correspondant pour un véhicule motorisé
DE10043579A1 (de) Brennkraftmaschine mit einer Kühler und Kühlerlüfter enthaltenden Kühlanlage für ein Fahrzeug, insbesondere im Eisenbahnverkehr

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20111019

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

R17D Deferred search report published (corrected)

Effective date: 20120308

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SIEMENS AKTIENGESELLSCHAFT

18D Application deemed to be withdrawn

Effective date: 20120927