DE102014213777A1 - Electric drive machine - Google Patents

Electric drive machine

Info

Publication number
DE102014213777A1
DE102014213777A1 DE102014213777.2A DE102014213777A DE102014213777A1 DE 102014213777 A1 DE102014213777 A1 DE 102014213777A1 DE 102014213777 A DE102014213777 A DE 102014213777A DE 102014213777 A1 DE102014213777 A1 DE 102014213777A1
Authority
DE
Germany
Prior art keywords
electric drive
drive machine
latent heat
rotor
stator
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.)
Pending
Application number
DE102014213777.2A
Other languages
German (de)
Inventor
Andreas Huber
Bernhard Hübner
Christian Steinle
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE102014213777.2A priority Critical patent/DE102014213777A1/en
Publication of DE102014213777A1 publication Critical patent/DE102014213777A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/22Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/003Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using thermochemical reactions
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/14Thermal storage
    • Y02E60/145Latent heat storage

Abstract

An electric drive machine, in particular for an electrically driven vehicle, has a rotor (14) and a stator (16). In the rotor (14) and / or in the stator (16), a latent heat accumulator (24) is arranged, wherein the latent heat accumulator (24) contains a storage material which absorbs heat accumulating during operation of the electric drive machine (10).

Description

  • The invention relates to an electric drive machine, for. B. an electric motor, in particular for an electrically driven vehicle.
  • The rated power of electric drive machines in vehicle technology is according to the test specification ECE R85 defined as the power which the electric motor can deliver, under given thermal boundary conditions, constantly for 30 minutes without exceeding its temperature limits. The rated power is due to the heat development significantly below the actual maximum power possible. Limiting factors here are above all the maximum permissible temperatures of the windings of the stator and the rotor. While the body of the stator is still relatively coolable by a liquid cooling from the outside, an air cooling is used for the rotor, but only a limited amount of heat can be dissipated.
  • The object of the invention is to increase the performance of an electric motor, in particular its rated power.
  • This is inventively achieved in an electric drive machine, in particular for an electrically driven vehicle, having a rotor and a stator by a latent heat accumulator is provided, which is arranged in the rotor and / or in the stator. The latent heat accumulator contains a storage material which absorbs heat generated during operation of the electric drive machine. As part of its storage capacity, the latent heat storage increases the heat capacity of the rotor and / or the stator and absorbs heat energy generated by the engine in its storage material. Effectively causes the latent heat storage so a cooling of the electric drive machine, which within the 30-minute test time after ECE R85 a higher rated power can be delivered.
  • In a preferred embodiment, the storage material is a material which undergoes a phase transition from solid to liquid during operation of the drive machine, wherein the heat emitted by the drive engine is converted into heat of fusion of the storage material.
  • Suitable storage materials are, for example, paraffins, sugar alcohols or inorganic salts, optionally also inorganic salt hydrates. These materials are known for use in latent heat storage, since they have a high heat of fusion, so that a large amount of heat can be absorbed with a relatively small amount of storage material.
  • In particular, when used in the rotor, it is possible to introduce the storage material of the latent heat storage in a carrier matrix or encapsulated to avoid liquid movements in the rotor.
  • It would also be conceivable to use as storage material a thermochemical material, in particular a silica gel or a zeolite, which absorbs thermal energy in a chemical reaction, for example with elimination of water. The advantage of thermochemical storage materials is that higher amounts of heat can be absorbed.
  • In common rotor designs recesses are often provided in the rotor body for weight reduction. These recesses in the body of the rotor can be used to arrange there with the memory material containing housing, which are part of the latent heat storage. This is especially useful when the rotor is designed as a sheet metal body. Preferably, the recesses are positively filled with the housing containing the storage material. Optionally, the weight gain associated with the location of the storage material on the rotor may be reduced by the choice of low density memory material. The choice of the exact volume of the latent heat storage and the respective storage material is the expert in the context of the respective circumstances.
  • Analogous to the design of the rotor, it is possible that the stator has a body with recesses and in the recesses of the memory material containing housing are arranged, which are part of the latent heat storage.
  • It is also possible to arrange in the region of the windings of the rotor and / or stator, in particular the winding head of the stator, the housing containing memory material, which are part of the latent heat accumulator.
  • The heat capacity of the latent heat storage is for example about 100 to 2000 kJ, in particular about 150 kJ. Thus, for example, when heating from room temperature to the maximum temperature of the electric drive machine, an increase in the energy to be absorbed can be achieved by about 15%, assuming an assumed power loss of the electric drive machine of about 250 W.
  • Preferably, a memory material is selected which allows an operating point of the latent heat storage at about 60 ° C to 300 ° C and especially at 140 ° C to 150 ° C. When the operating point to temperatures above 100 ° C and in particular on 140 ° C can raise to 150 ° C, heat absorption in the memory material with the associated phase transition, especially at full load of the electric drive machine is possible, while at lower operating points, a part of the storage material changes its state already at partial load operation.
  • The invention will be described in more detail below with reference to an embodiment with reference to the accompanying drawings. In the drawings show:
  • 1 a schematic sectional view of an electric drive machine according to the invention; and
  • 2 a schematic sectional view of a rotor of the electric drive machine 1 ,
  • 1 shows an electric drive machine 10 , here an electric motor for an electrically driven vehicle.
  • One on a rotor shaft 12 arranged rotor 14 rotates within a fixed stator 16 , rotor 14 and stator 16 are provided with windings, not shown, as is known by electric motors.
  • In this example, both have the rotor 14 as well as the stator 16 a body which is made in a known manner from electrical sheets.
  • In the rotor 14 are distributed over the circumference several recesses 18 provided, which serve the weight saving. In this example are also in the body of the stator 16 distributed over the circumference several recesses 20 educated.
  • In the recesses 18 of the rotor 14 as well as in the recesses 20 of the stator 16 are due to the shape of the recesses 18 . 20 adapted housing 22 used, which contain a storage material that can absorb heat energy by a phase transition or a chemical reaction. All cases 22 Together with the storage material contained in them together form a latent heat storage 24 ,
  • Of course it is also possible, the latent heat storage 24 only on the rotor 14 or just on the stator 16 to restrict. It is also conceivable, alternatively or additionally, housing with storage material in the region of the windings of the rotor 14 and / or stator 16 , in particular in the field of winding heads, provide.
  • As a storage material here is a material used in the operation of the electric drive machine 10 reached temperatures passes through a phase transition from solid to liquid. Here, for example, a suitable paraffin, a sugar alcohol or an inorganic salt or salt hydrate in question. The phase transition temperatures of these materials are about 60 ° C to 200 ° C. Preferably, materials or material mixtures are used which have a melting temperature of about 140 ° C to 150 ° C.
  • It is possible to store the storage material inside the case 22 in a carrier matrix or to fill it in small plastic capsules and these in the housing 22 to fill in particular in the rotor 14 To prevent or reduce movements of the storage material in its liquid phase.
  • The total heat capacity of the storage material of the latent heat storage 24 here is about 50 to 300 kJ, in particular about 150 kJ.
  • During operation of the electric drive machine 10 arises in particular in the windings of the stator 16 and in the rotor 14 Loss of heat that heats these components. Upon reaching the operating point of the storage material of the latent heat storage 24 This heat energy is absorbed in the storage material by changing its state of aggregation. The excess, from the electric drive machine 10 emitted heat energy is converted into heat of fusion of the storage material and so absorbed as latent heat in the storage material. Effectively, this means cooling the electric drive machine 10 in the context of the storage capacity of the latent heat storage 24 , If the entire storage material has gone into the liquid state of aggregation, then the storage capacity of the latent heat storage 24 exhausted.
  • When cooling to temperatures below the melting temperature of the storage material, for example after switching off the electric drive machine 10 or even at partial load operation, in which less heat loss drops and the normally provided cooling of the electric drive machine 10 sufficient to the temperature below the melting temperature of the storage material in the latent heat storage 24 bring the storage material, the absorbed heat energy again and it changes again the state of matter, so that the storage material is available for a new heat absorption.
  • Suitable materials, in particular with respect to the melting point and the density of the storage material, the appropriate amount and the Arrangement, size and number of recesses 18 . 20 in rotor 14 and stator 16 at the discretion of the skilled person depending on the particular circumstances.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited non-patent literature
    • ECE R85 [0002]
    • ECE R85 [0004]

Claims (8)

  1. Electric drive machine, in particular for an electrically driven vehicle, with a rotor ( 14 ) and a stator ( 16 ), as well as a latent heat storage ( 24 ) in the rotor ( 14 ) and / or in the stator ( 16 ), wherein the latent heat storage ( 24 ) contains a memory material which during operation of the electric drive machine ( 10 ) absorbs accumulating heat.
  2. Electric drive machine according to claim 1, characterized in that the storage material is a material which, during operation of the electric drive machine ( 10 ) undergoes a phase transition from solid to liquid.
  3. Electric drive machine according to claim 2, characterized in that the storage material is a paraffin, a sugar alcohol or an inorganic salt.
  4. Electric drive machine according to one of the preceding claims, characterized in that the rotor ( 14 ) a body with recesses ( 18 ) and in the recesses ( 18 ) with the housing containing the memory material ( 22 ), which are part of the latent heat store ( 24 ) are.
  5. Electric drive machine according to one of the preceding claims, characterized in that the stator ( 16 ) a body with recesses ( 20 ) and in the recesses ( 18 ) with the housing containing the memory material ( 22 ), which are part of the latent heat store ( 24 ) are.
  6. Electric drive machine according to one of the preceding claims, characterized in that in the region of the windings of rotor ( 14 ) and / or stator ( 16 ), in particular the winding head of the stator ( 16 ), with which the storage material containing housing are arranged, the part of the latent heat storage ( 24 ) are.
  7. Electric drive machine according to one of the preceding claims, characterized in that the heat capacity of the latent heat accumulator ( 24 ) is about 100-2000 kJ, in particular about 150 kJ.
  8. Electric drive machine according to one of the preceding claims, characterized in that the operating point of the latent heat accumulator ( 24 ) at about 60 C to 300 ° C, especially at 140 ° C to 150 ° C.
DE102014213777.2A 2014-07-16 2014-07-16 Electric drive machine Pending DE102014213777A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102014213777.2A DE102014213777A1 (en) 2014-07-16 2014-07-16 Electric drive machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014213777.2A DE102014213777A1 (en) 2014-07-16 2014-07-16 Electric drive machine

Publications (1)

Publication Number Publication Date
DE102014213777A1 true DE102014213777A1 (en) 2016-01-21

Family

ID=55021662

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102014213777.2A Pending DE102014213777A1 (en) 2014-07-16 2014-07-16 Electric drive machine

Country Status (1)

Country Link
DE (1) DE102014213777A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018082973A1 (en) * 2016-11-02 2018-05-11 Jaguar Land Rover Limited Cooling of an electrical machine
CN109842226A (en) * 2019-02-20 2019-06-04 浙江大学 Wind-driven generator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4717318A (en) * 1984-12-14 1988-01-05 The Garrett Corporation Turbocharger heat transfer control method and apparatus
DE4335848A1 (en) * 1993-10-20 1995-04-27 Voith Gmbh J M Cooling arrangement for an AC machine
DE102009027857A1 (en) * 2009-07-21 2011-01-27 Robert Bosch Gmbh Electromechanical device e.g. starter, for internal-combustion engine of motor vehicle, has cooling device comprising heat reservoir with phase change materials that exhibit temperature in operating range of operating temperature
DE102010041586A1 (en) * 2010-09-29 2012-03-29 Siemens Aktiengesellschaft Electric machine e.g. synchronous machine, for use in ship, has heat exchanger provided with phase change material and heat conductively connected with stator, and rotor comprising air cooling passages for cooling process
DE102012204422A1 (en) * 2012-03-20 2013-09-26 Robert Bosch Gmbh Electric machine with PCM to catch temperature peaks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4717318A (en) * 1984-12-14 1988-01-05 The Garrett Corporation Turbocharger heat transfer control method and apparatus
DE4335848A1 (en) * 1993-10-20 1995-04-27 Voith Gmbh J M Cooling arrangement for an AC machine
DE102009027857A1 (en) * 2009-07-21 2011-01-27 Robert Bosch Gmbh Electromechanical device e.g. starter, for internal-combustion engine of motor vehicle, has cooling device comprising heat reservoir with phase change materials that exhibit temperature in operating range of operating temperature
DE102010041586A1 (en) * 2010-09-29 2012-03-29 Siemens Aktiengesellschaft Electric machine e.g. synchronous machine, for use in ship, has heat exchanger provided with phase change material and heat conductively connected with stator, and rotor comprising air cooling passages for cooling process
DE102012204422A1 (en) * 2012-03-20 2013-09-26 Robert Bosch Gmbh Electric machine with PCM to catch temperature peaks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ECE R85

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018082973A1 (en) * 2016-11-02 2018-05-11 Jaguar Land Rover Limited Cooling of an electrical machine
GB2558368A (en) * 2016-11-02 2018-07-11 Jaguar Land Rover Ltd Cooling of an electrical machine
GB2558368B (en) * 2016-11-02 2019-04-24 Jaguar Land Rover Ltd Cooling of an electrical machine
CN109842226A (en) * 2019-02-20 2019-06-04 浙江大学 Wind-driven generator

Similar Documents

Publication Publication Date Title
CN105229846B (en) Prevent for the active heat management and thermal runaway of lithium ion battery with high energy density group
KR20120106887A (en) Thermal management of an electrochemical cell by a combination of heat transfer fluid and phase change material
EP2226887B1 (en) Temperature control system for a battery pack
US9379392B2 (en) Temperature control method and battery system
EP2587641A2 (en) Motor having heat transfer sheet
DE10202807B4 (en) Device for tempering high-performance secondary batteries for vehicle applications
KR20130014551A (en) Energy handling system comprising an energy storage device with a phase change material
CN103765730B (en) Cooled magnetic motor
US20130257197A1 (en) Electric machine having efficient internal cooling
RU2668383C2 (en) Low-energy nuclear thermoelectric system
JP2010539667A (en) Temperature controlled battery device and method for temperature regulating battery device
US20160006088A1 (en) Battery thermal management for hybrid electric vehicles using a phase-change material cold plate
EP2044646B1 (en) Compact power supply device for a motor vehicle comprising regulated cooling means
DE102011106690A1 (en) Battery pack mounted in motor car, has compressible insulator plate which is arranged beside battery cell and has phase change material
US9369027B2 (en) Magnetic steel cooling structure for a permanent magnetic motor of an electric vehicle and cooling method thereof
DE102013225582A1 (en) Battery system with releasable heat storage
JP2010525996A (en) Packaging with phase change material and use during transportation of temperature sensitive packages
ES2743247T3 (en) Turbine with heating system, and corresponding solar power plant and operating procedure
JP5709014B2 (en) Method and apparatus for temperature regulation of a rechargeable battery storing electrical energy
US20090199998A1 (en) Two material phase change energy storage system
US20140262126A1 (en) Cooling apparatus and cooling method
US8182935B2 (en) Electrochemical energy store
EP2571096B1 (en) Battery temperature adjustment device
US9617980B2 (en) Wind power generating system
EP0588004A1 (en) Electrical storage battery, particularly useful for vehicle drive

Legal Events

Date Code Title Description
R163 Identified publications notified