WO2003073587A1 - Verfahren zur nachbildung des temperaturverlaufes elektrischer antriebe - Google Patents
Verfahren zur nachbildung des temperaturverlaufes elektrischer antriebe Download PDFInfo
- Publication number
- WO2003073587A1 WO2003073587A1 PCT/DE2003/000378 DE0300378W WO03073587A1 WO 2003073587 A1 WO2003073587 A1 WO 2003073587A1 DE 0300378 W DE0300378 W DE 0300378W WO 03073587 A1 WO03073587 A1 WO 03073587A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- motor
- umg
- mot
- engine
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images
- H02H6/005—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images using digital thermal images
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
Definitions
- Electronically mutated DC motors which are controlled by a microcontroller ( ⁇ C) are also used in motor vehicles today.
- These electrical machines usually include a position sensor, and the voltage supply from a DC voltage network takes place via control and power electronics.
- the areas of application of these electrical machines are in the area of ventilation, air conditioning and in pump and / or actuator drives within the motor vehicle. Thanks to the electronic control, these electric drives can also take on additional functions such as stepless speed control, reversing the direction of rotation, smooth starting and blocking protection, without further modifications to these electric drives being necessary.
- the relative duty cycle is defined as the ratio of the duration of the run of the electric drive under load, including start-up and braking, and the play time.
- the duty cycle counter is usually incremented in a defined time grid when the electrical machine is running. However, if the electric drive is switched off, the duty cycle counter is decremented.
- the duty cycle counter is generally decremented in a specific, preselectable ratio compared to the increment of the duty cycle counter. Examples include incrementing the duty cycle counter by 1 every second when the motor is activated and decrementing the duty cycle counter by 1 every 8 seconds when the electric drive is not triggered.
- the actual temperature development in the electric drive only matches in a very limited temperature range.
- the actual temperature development in the electric drive only matches in a very limited temperature range. Warming up and cooling down are naturally e-functions according to equations (I) and (II).
- the ratio of the duty cycle counter is the heared ratio of this warm-up and cool-down function around a certain working point. The operating point covers the worst specified case, e.g. B. 80 ° C.
- the ratio of the duty cycle counter changes accordingly.
- the duty cycle counter and its incrementation or decrementation are generally designed for a constant duty cycle of the electric drive to be monitored, as seen over time. If, however, the duty cycle varies more strongly over time, the actual temperature within the electric drive and the temperature value, which is represented by the respective counter reading of the duty cycle counter, diverge very strongly.
- a duty cycle counter When using a duty cycle counter, it is not taken into account that the internal temperature of the housing of an electric drive can increase during long-term operation, especially with thermally encapsulated electric drives. However, this significantly increases the cooling time of the electric drive. However, since the meter is designed to work linearly, the meter reading and the actual temperature of the electric drive no longer match, which in the worst case can lead to the destruction of the electric drive.
- a duty cycle counter is usually designed in such a way that, in the case of a certain assumed, worst-case scenario, for example at an ambient temperature of 80 ° C, the protection of the electric drive is guaranteed. However, this high limit value considerably limits the availability of the electric drive when operating under normal ambient temperatures that are below 80 ° C.
- the natural temperature profile of an electrical drive can be simulated in software without the need for a sensory determination of the temperature directly on the electrical drive.
- a limit temperature of the electric drive is exceeded, its availability is restricted. If the temperature continues to increase and a further, higher limit temperature is exceeded, the operation of the electric machine is suspended. The operation of the electric drive is suspended until the temperature falls below a limit temperature below the first-mentioned limit temperature.
- thermal overload protection Due to the temperature curve reproduced in the software inside the electrical drive and the temperature of the motor and / or its attachments - taking heating and cooling into account - a much more precise thermal overload protection can be provided, which provides the actual Reflects temperature conditions within the electric drive compared to an overload protection, which is formed by means of a duty cycle counter. Assuming comparable load conditions for electrical drives with overload protection by means of a duty cycle counter and overload protection represented in software, the solution using an overload protection implemented in software increases the availability of the electrical drive, even under the most unfavorable temperature conditions with regard to the ambient temperature. A temperature calculation is initialized using a temperature value.
- This value can either be measured directly on the control electronics and processed in the evaluation software, or a temperature value, for example the internal temperature of the case, is made available via a communication interface, for example CAN bus. This significantly improves the availability of the electric drive.
- the single figure shows the calculation sequence for determining the heating of the running electrical drive, the calculation of the heating of the surroundings when the electrical drive is running, and the calculation of the cooling of the electrical drive.
- a numerical calculation of the temperature development takes place both for the internal housing temperature (environment in relation to the motor and / or the attachments of the electric drive) and the temperature of the motor and / or the attachments of the electric drive.
- An initial temperature is used as the basis for the numerical calculations for the internal housing temperature (environment) and the calculations for the temperature of the motor and / or the attachments of the electric drive.
- This can be both a fixed constant, which covers the worst case, and a variable temperature value, which is either measured and processed directly in the device on the control electronics or provided via a communication interface.
- the initial temperature can, for example, be assigned the value for the vehicle's internal temperature at the start and made available via a CAN data bus.
- T (t) temperature at time t
- T (sat) saturation temperature
- k coefficient for warming up
- T (t) (T 0 - T (U)). e (-k 2 Y'o)) + T (U) (II)
- T (t) temperature at time t
- T (U) housing internal and ambient temperature
- k 2 coefficient for cooling
- the coefficients k 1 and k 2 used can preferably be found in empirically determined tables of values. These values for k and k 2 essentially depend on the materials used for the housing or the motor of the electric drive.
- the mechanism of heat transport - be it heat conduction or convection - is included in these coefficients, so that the actual operating conditions are depicted as accurately as possible. The more precisely these are depicted in the calculation algorithm, the more precise the calculation of the actually prevailing temperature profile with regard to cooling or heating can be guaranteed.
- the saturation temperature of the motor and / or the attachments of the electric drive is for T (sat) and the warm-up coefficient of the motor and / or the attachments of the electric drive TM for k ⁇ to use.
- the course of the heating up of the interior of the housing is to be determined using equation (I)
- the values of the saturation temperatures and the coefficients for calculating the temperature of the interior of the housing and of the electric drive generally differ. If the cooling behavior of the motor of the electric drive is calculated with equation (II), the internal housing temperature for T (U) and the cooling coefficient of the motor and / or its attachments of the electric drive k ⁇ ab must be used for k 2 . On the other hand, if the course of the cooling of the interior of the housing is to be determined using equation (II), the ambient temperature must be used for T (U) and the cooling coefficient of the interior of the housing k " mg _ ab for k 2 .
- the values of the coefficients of the temperature of the interior of the housing and of the electric drive generally differ.
- an electric drive motor which is installed in a housing, which is isolated from the outside, for example by a protective cap or a PU foam, cooling of the housing interior temperature can be neglected, so that only a warming up of the housing interior can be calculated.
- the calculation of the internal housing temperature is advantageously limited to a maximum value, so that the calculation of a value increasing in the direction ⁇ is avoided.
- Equation (II) in: ' 00 and equation (III) in: T umg (n) T ⁇ + k ⁇ ,, (VI)
- T mot (n) currently calculated temperature of the electric drive
- T mot (n -i ) temperature of the electric drive from the previous cycle
- T sat saturation temperature of the electric drive k mot - auf : coefficient warming up electric drive
- T umg (n) current housing temperature
- T umg (n . N housing temperature from the previous cycle
- k jnot ab coefficient cooling electric drive k umg : coefficient warming up environment above
- a critical threshold is exceeded in the discrete calculation of the temperature of the motor and / or its add-on parts of the electric drive according to (IV)
- a reduced operation of the electric drive is forced so that, if possible, no further temperature rise in the motor and / or the add-on parts of the electric drive.
- the electric drive is e.g. a pump is deactivated.
- the electric drive After falling below a temperature threshold which is below the two mentioned temperature thresholds during heating, the electric drive, such as a vane pump, is again fully available for supplying compressed air to auxiliary units on motor vehicles.
- the temperature threshold from which the motor of the electric drive can be operated again for thermal reasons is calculated in accordance with (V).
- Reference number 1 denotes a start routine which passes to an initialization query 2.
- the initialization query 2 it is queried whether the motor of the electric drive, which drives a vane pump or another conveyor unit for supplying additional units within a motor vehicle, for example, is switched on or not. If the initialization query 2 is answered in the negative, there is a first branch 3 for a calculation of the abbreviation 8 of the motor and or the add-on parts of the electric drive. If, on the other hand, the initialization query 2 is answered in the affirmative, there is a branch 4 for a heating calculation of the motor and / or the add-on parts of the electric drive. The heating of the motor of the electric drive is calculated by a discrete calculation of an e-function according to equation (IV).
- a branch is made to a query 5 of the maximum ambient temperature.
- Query 5 asks whether the ambient temperature is below a maximum permissible ambient temperature. If this query is answered in the negative, the calculation of the heating of the surroundings according to position symbol 7 is avoided by a second branch for cooling calculation 8 of the motor of the electric drive. If query 5 is answered in the affirmative, a branch is made to calculate the warming of the surroundings.
- the solution proposed according to the invention offers in particular the advantage that the cooling routine of the motor, designated in the flowchart with reference number 8, and / or its add-on parts of the electric drive is calculated in relation to the likewise calculated internal housing temperature. While in the case of overload protections which are formed by the duty cycle counter, in the case of greatly varying duty cycles and when the internal temperature of the housing increases, the actual course of the engine temperature of the motor of the electric drive only insufficiently reproduces, the solution proposed according to the invention provides a way, bypassing a decrement ratio - how common for duty cycle counters - to get actual information about the current drive temperature.
- the measures to be taken using the current operating temperature of the motor and / or its attachments to protect against overloading the electric drive are therefore carried out Basis of a much more meaningful and more precisely determined drive temperature.
- the shift in the current temperature and the distortion resulting from a decrementing of a duty cycle counter as overload protection of an electric drive motor and the distortion resulting in the duty cycle counter, i.e. the deviation of the actual temperature from the temperature shown in the duty cycle counter can be avoided by using the method proposed according to the invention.
- the measures which reduce the load on the electric drive motor when the heating has taken place are now carried out by comparing the values in a time grid of e.g. 100 ms, determined engine temperature with a first or a second temperature threshold.
- the first or the second temperature threshold can be preselected depending on the dimensioning and the design and the installation conditions of the motor of the electric drive and the motor temperature represents a much more precise determined temperature of the electric drive due to the lack of a decrement ratio, on the one hand the overloading of the electric drive can be effectively limited when heating, on the other hand, a higher availability of the electric drive can be achieved due to a much more accurate detection of the cooling of the electric drive after operation.
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03704306A EP1481461A1 (de) | 2002-02-26 | 2003-02-10 | Verfahren zur nachbildung des temperaturverlaufes elektrischer antriebe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10208115.8 | 2002-02-26 | ||
DE2002108115 DE10208115A1 (de) | 2002-02-26 | 2002-02-26 | Verfahren zur Nachbildung des TEmperaturverlaufes elektrischer Antriebe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003073587A1 true WO2003073587A1 (de) | 2003-09-04 |
Family
ID=27762438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/000378 WO2003073587A1 (de) | 2002-02-26 | 2003-02-10 | Verfahren zur nachbildung des temperaturverlaufes elektrischer antriebe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1481461A1 (de) |
DE (1) | DE10208115A1 (de) |
WO (1) | WO2003073587A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10260106B4 (de) * | 2002-12-19 | 2020-04-23 | Robert Bosch Gmbh | Verfahren zum Schutz von Halbleiter-Endstufen |
DE102015226076A1 (de) | 2015-12-18 | 2017-06-22 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Bestimmen einer Temperatur einer Komponente in einem mechatronischem System |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5525881A (en) | 1992-01-03 | 1996-06-11 | Valeo Systemes D'essuyage | Method and apparatus for the thermal control of an electric motor in a vehicle, and their application to a power assisted steering system |
DE19816837A1 (de) * | 1997-09-18 | 1999-03-25 | Bosch Gmbh Robert | Elektromotorischer Antrieb |
US5936820A (en) * | 1997-05-30 | 1999-08-10 | Aisin Seiki Co., Ltd. | Overheating protection system of switching module |
EP1154251A1 (de) | 2000-05-09 | 2001-11-14 | Toyota Jidosha Kabushiki Kaisha | Verfahren zur Ermittlung einer Temperatur und Gerät zur Durchführung des Verfahrens |
-
2002
- 2002-02-26 DE DE2002108115 patent/DE10208115A1/de not_active Ceased
-
2003
- 2003-02-10 WO PCT/DE2003/000378 patent/WO2003073587A1/de not_active Application Discontinuation
- 2003-02-10 EP EP03704306A patent/EP1481461A1/de not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5525881A (en) | 1992-01-03 | 1996-06-11 | Valeo Systemes D'essuyage | Method and apparatus for the thermal control of an electric motor in a vehicle, and their application to a power assisted steering system |
US5936820A (en) * | 1997-05-30 | 1999-08-10 | Aisin Seiki Co., Ltd. | Overheating protection system of switching module |
DE19816837A1 (de) * | 1997-09-18 | 1999-03-25 | Bosch Gmbh Robert | Elektromotorischer Antrieb |
EP1154251A1 (de) | 2000-05-09 | 2001-11-14 | Toyota Jidosha Kabushiki Kaisha | Verfahren zur Ermittlung einer Temperatur und Gerät zur Durchführung des Verfahrens |
Also Published As
Publication number | Publication date |
---|---|
DE10208115A1 (de) | 2003-10-09 |
EP1481461A1 (de) | 2004-12-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1471628B1 (de) | Elektronisch kommutierter Motor, und Verfahren zum Betreiben eines solchen | |
DE10231452B4 (de) | Lüfterregelungssystem unter Verwendung einer Mikrosteuerung | |
DE102015118867B4 (de) | Steuerungsvorrichtung für einen fahrzeugeigenen elektrischen Verdichter | |
EP2469094B1 (de) | Verfahren zum Betrieb eines Doppelpumpen- oder Multipumpenaggregates | |
EP2739859B1 (de) | Drehzahl-gesteuerter lüfter mit kontrolle der leistungsaufnahme des elektromotors | |
DE102022101629B4 (de) | Systeme und verfahren zur steuerung von innenpermanentmagnetsynchronmotoren | |
DE102005045137A1 (de) | Lüftereinheit mit einer vorgegebenen künstlichen Kennlinie und Verfahren zu dessen Betrieb | |
DE102005045249A1 (de) | Elektronische Steuereinheit an einem Fahrzeug | |
DE10347426A1 (de) | Verfahren und System zur Modellierung einer Generatorlast zur Steuerung der Leerlaufdrehzahl eines Verbrennungsmotors | |
WO2009065539A1 (de) | Lüfterandordnung | |
EP1966879A1 (de) | Verfahren und vorrichtung zur ansteuerung eines elektromotors | |
WO1992010017A1 (de) | Verfahren und vorrichtung zur ermittlung der belastung und/oder der belastbarkeit elektronisch geregelter bauteile oder baugruppen | |
EP2469070B1 (de) | Begrenzung des Startspannungseinbruchs in einem Kraftfahrzeug-Bordnetz | |
WO2001091264A1 (de) | Thermische überwachung eines elektrischen lastelementes | |
WO2003073587A1 (de) | Verfahren zur nachbildung des temperaturverlaufes elektrischer antriebe | |
EP1249060A1 (de) | Verfahren zum schutz eines elektromotors vor thermischer überlastung | |
EP3364512B1 (de) | Verfahren und anordnung zum schutz eines elektromotors vor überhitzung | |
EP0938766A1 (de) | Elektromotorischer antrieb | |
DE19635924C2 (de) | Stellantrieb mit vor Überlastung geschütztem Elektromotor | |
EP3598631B1 (de) | Verfahren zum betrieb einer elektrisch kommutierten maschine und elektrisch kommutierte maschine | |
EP2371055B1 (de) | Verfahren und steuerungseinrichtung zum ansteuern eines elektromotors | |
WO2022122262A1 (de) | ELEKTRISCHES SYSTEM UND VERFAHREN UND VORRICHTUNG ZUM BESTIMMEN EINES WERTEVERLAUFS EINER STEUERGRÖßE | |
DE102004036134B4 (de) | Verfahren zur Ansteuerung eines Elektromotors einer Stellvorrichtung für Durchflusssteuerungskomponenten in einer Verbrennungskraftmaschine sowie Stellvorrichtung zur Durchführung eines derartigen Verfahrens | |
DE102009001507B4 (de) | Verfahren zum Betrieb eines elektrischen Servolenksystems und danach arbeitendes Steuergerät | |
EP1537318B1 (de) | Verfahren zum betrieb einer brennkraftmaschine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT SE SI SK TR |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
REEP | Request for entry into the european phase |
Ref document number: 2003704306 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003704306 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003704306 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: JP |