EP1969714A1 - Procede pour determiner la temperature de l' aimant sur des machines synchrones - Google Patents

Procede pour determiner la temperature de l' aimant sur des machines synchrones

Info

Publication number
EP1969714A1
EP1969714A1 EP06830681A EP06830681A EP1969714A1 EP 1969714 A1 EP1969714 A1 EP 1969714A1 EP 06830681 A EP06830681 A EP 06830681A EP 06830681 A EP06830681 A EP 06830681A EP 1969714 A1 EP1969714 A1 EP 1969714A1
Authority
EP
European Patent Office
Prior art keywords
magnet temperature
uind
determining
electric machine
phase voltage
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Withdrawn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
EP06830681A
Other languages
German (de)
English (en)
Inventor
Martin Eisenhardt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1969714A1 publication Critical patent/EP1969714A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
    • G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2205/00—Application of thermometers in motors, e.g. of a vehicle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2217/00—Temperature measurement using electric or magnetic components already present in the system to be measured
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the invention relates to a method for determining the magnet temperature of an electrical, in particular, permanently excited, electric machine according to the preamble of patent claim 1, and to a corresponding device according to the preamble of patent claim 7.
  • Permanently excited electric machines are often used as electric drives.
  • Permanently excited synchronous machines comprise a rotor in which usually the magnets which generate the magnetic flux are arranged.
  • the magnets are relatively temperature sensitive and can be permanently damaged at temperatures that may already be reached during normal driving of a hybrid vehicle. To prevent this, the phase currents are usually limited from reaching a critical magnet temperature.
  • the magnet temperature is usually estimated from the measured stator temperature. This magnet temperature estimate assumes that the rotor and permanent magnets are at about the same temperature as the stator. However, this estimation is heavily flawed, especially in transient processes.
  • the temperature threshold for the aforementioned limitation of the phase current must be chosen to be relatively low.
  • the maximum performance of the machine can thus not be fully utilized. It is therefore the object of the present invention to provide a method for determining the magnet temperature of the magnets of a permanently excited electrical machine, with which the magnet temperature determined much more accurate and thus the electric machine can be used up to higher temperatures with maximum power.
  • An essential aspect of the invention is to measure a phase voltage and the rotational speed of the electric machine and to determine the magnet temperature from the phase voltage and the rotational speed.
  • the invention uses the knowledge that the magnetic flux ⁇ generated by the magnets is a function of the magnet temperature T, where:
  • the inverse function T f 1 ( ⁇ ) is determined offline and stored in a map.
  • the magnetic flux ⁇ can be determined by the law of induction, according to which:
  • the magnet temperature can thus be determined from the induced voltage Uind and the rotational speed n. This has the significant advantage that the magnetic temperature determined much more accurate and thus the electric machine can be operated up to a higher temperature threshold with high power. Only after reaching this high threshold must measures be taken to protect the electrical machine.
  • the induced phase voltage Uind is preferably measured at idle speed of the electric machine at a sufficiently high speed n.
  • the circuit breakers of the pulse inverter are all open and the voltage applied to the terminals of the machine phase voltage Uind is sinusoidal.
  • the induced voltage Uind can, for example, between any two of the phases, for. B. U and V, or measured between a phase and a reference potential.
  • the peak value of the measured phase voltage is preferably determined. This corresponds to the above-mentioned induced voltage
  • the electric machine is preferably connected to a pulse inverter.
  • the phase voltage is preferably measured at a speed that is less than a predetermined maximum speed.
  • phase voltage is the DC link or Mains voltage does not exceed and the freewheeling diodes of the pulse inverter are not conductive.
  • Fig. 1 shows a schematic representation of a permanent magnet synchronous machine 1 with a pulse inverter 2 (PWR).
  • the PWR 2 determines the power and operating mode of the electric machine 1 and is controlled accordingly by a control unit 12.
  • the electric machine 1 can be operated optionally in motor or generator mode.
  • the electric machine generates an additional drive torque, the engine z. B. supported in an acceleration phase.
  • generator mode mechanical energy is converted into electrical energy and stored in an energy storage such.
  • a battery 9 or a super-cap As a battery 9 or a super-cap.
  • the electric machine 1 is here designed in 3 phases (phases U, V, W) and comprises a stator with three strings 3a-3c and a rotor with a plurality of permanent magnets 11.
  • the ohmic resistances of the strings 3a-3c are marked 10a-10c ,
  • the three phases U, V, W of the electric machine 1 are each connected to the pulse inverter.
  • the PWR 2 comprises in a known manner a plurality of switches 6a-6f, with which the individual phases U, V, W can optionally be connected to a DC link potential U z or a reference potential (ground).
  • the PWR 2 further includes a plurality of free-wheeling diodes 7a-7f, which are respectively connected in parallel to one of the switches 6a-6f.
  • a mathematical model is used which is stored in the control unit 12.
  • the algorithm determines the magnet temperature T from the induced voltage Uind and the rotational speed n of the electric machine 1. The following applies:
  • the speed n of the electric machine is measured by means of a speed sensor 5.
  • the voltage induced in the stator windings 3a-3c is shown schematically here by voltage sources 4a-4c.
  • induced voltage Uind for example, the voltage between two of the phases, for. B. U and V, or the voltage between one of the phases, U, V, W, and a
  • Reference potential can be measured. This voltage is sinusoidal and is preferably measured when the machine 1 is idling. When idling, all six power switches 6a-6f of the pulse-controlled inverter 2 are open.
  • the speed of the electric machine 1 must be sufficiently large in the measurement, but on the other hand may not exceed a maximum speed from which the freewheeling diodes 7a - 7f act as a rectifier bridge.
  • the phase voltages would otherwise be distorted and no longer sinusoidal.
  • the voltage and speed signals (Uind or n) are supplied to the controller 12 at the input.
  • the algorithm stored in the control unit 12 processes the values and determines therefrom the magnet temperature T. When a predetermined temperature threshold is exceeded, the control unit 12 generates an output signal A for the pulse inverter 2, with which the power of the electric machine 1 is reduced and thus overheating can be avoided ,
  • the above function or inverse function T f 1 (n, can be determined either analytically or z. B. deposited as a map in a control unit. In this way, the magnet temperature T can be determined particularly accurately and simply by taking the associated magnet temperature T from the characteristic field for measured values of n and Uind.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un procédé pour déterminer la température de l'aimant d'une machine électrique (1) à excitation permanente. La température (T) de l'aimant peut être déterminée de manière particulièrement simple et précise en mesurant une tension de phase (U<SUB>ind</SUB>) et la vitesse de rotation (n) de la machine électrique (1) est en déterminant la température (T) de l'aimant à partir de celles-ci.
EP06830681A 2005-12-27 2006-12-18 Procede pour determiner la temperature de l' aimant sur des machines synchrones Withdrawn EP1969714A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005062588A DE102005062588A1 (de) 2005-12-27 2005-12-27 Verfahren zum Bestimmen der Magnettemperatur bei Synchronmaschinen
PCT/EP2006/069841 WO2007074097A1 (fr) 2005-12-27 2006-12-18 Procédé pour déterminer la température de l’aimant sur des machines synchrones

Publications (1)

Publication Number Publication Date
EP1969714A1 true EP1969714A1 (fr) 2008-09-17

Family

ID=37814641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830681A Withdrawn EP1969714A1 (fr) 2005-12-27 2006-12-18 Procede pour determiner la temperature de l' aimant sur des machines synchrones

Country Status (4)

Country Link
US (1) US8222844B2 (fr)
EP (1) EP1969714A1 (fr)
DE (1) DE102005062588A1 (fr)
WO (1) WO2007074097A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008054216A1 (de) * 2008-10-31 2010-05-06 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Einstellung eines elektrischen Antriebs sowie Kraftfahrzeug
DE102008043945A1 (de) * 2008-11-20 2010-05-27 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Hybridantriebes für ein Fahrzeug
WO2011024935A1 (fr) 2009-08-28 2011-03-03 日産自動車株式会社 Dispositif de détection d'anomalie pour un moteur électrique synchrone à aimant permanent
DE102010039766A1 (de) 2010-08-25 2012-03-01 Robert Bosch Gmbh Verfahren und Vorrichtung zum Steuern einer Synchronmaschine
JP5735305B2 (ja) * 2011-02-25 2015-06-17 Ntn株式会社 電気自動車
FR2995742B1 (fr) * 2012-09-18 2015-10-16 Renault Sas Surveillance d'un moteur a aimants permanents
WO2014057558A1 (fr) * 2012-10-11 2014-04-17 三菱電機株式会社 Dispositif de commande de moteur et procédé de commande de moteur
WO2014107496A1 (fr) * 2013-01-02 2014-07-10 Trane International Inc. Système de diagnostic de dégradation pour moteur à aimant permanent
DE102013201468A1 (de) * 2013-01-30 2014-07-31 Zf Lenksysteme Gmbh Verfahren zum betrieb eines elektromotors
DE102013208335A1 (de) * 2013-05-07 2014-11-13 Mahle International Gmbh Motor und Verfahren zum Antreiben einer Pumpe
DE102015005555A1 (de) 2015-04-29 2016-11-03 Daimler Ag Verfahren zur Bestimmung einer Magnettemperatur einer permanent erregten elektrischen Maschine
JP2017108568A (ja) * 2015-12-11 2017-06-15 株式会社エクセディ モータ制御装置及びハイブリッド式車両の駆動制御装置
CA3080814A1 (fr) 2017-10-30 2019-05-09 Annexair Inc. Systeme de controle d'une pluralite de moteurs synchrones commutes electroniquement a aimants permanents
KR102570296B1 (ko) * 2018-11-08 2023-08-24 현대자동차주식회사 차량 및 그 제어방법
DE102019126268A1 (de) * 2019-09-30 2021-04-01 Audi Ag Bestimmung der Rotortemperatur einer PSM
JP7363529B2 (ja) * 2020-01-28 2023-10-18 マツダ株式会社 モータの磁石温度推定装置、及びそれを備えるハイブリッド車
JP7363528B2 (ja) * 2020-01-28 2023-10-18 マツダ株式会社 モータの磁石温度推定装置、及びそれを備えるハイブリッド車
DE102020117279A1 (de) 2020-07-01 2022-01-05 Dr. Ing. H.C. F. Porsche Aktiengesellschaft System und Verfahren zur Bestimmung der Magnettemperatur bei einer permanenterregten Synchronmaschine
FR3145612A1 (fr) 2023-02-06 2024-08-09 IFP Energies Nouvelles Procédé de détermination en temps réel de la température d’un rotor d’une machine électrique

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Also Published As

Publication number Publication date
US20090174351A1 (en) 2009-07-09
WO2007074097A1 (fr) 2007-07-05
DE102005062588A1 (de) 2007-06-28
US8222844B2 (en) 2012-07-17

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