EP3508029A1 - Electric heater and method for detecting overheating in such an electric heater - Google Patents
Electric heater and method for detecting overheating in such an electric heaterInfo
- Publication number
- EP3508029A1 EP3508029A1 EP17758537.9A EP17758537A EP3508029A1 EP 3508029 A1 EP3508029 A1 EP 3508029A1 EP 17758537 A EP17758537 A EP 17758537A EP 3508029 A1 EP3508029 A1 EP 3508029A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- electric heater
- current
- overheating
- change
- 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.)
- Granted
Links
- 238000013021 overheating Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 130
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 239000012530 fluid Substances 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000003302 ferromagnetic material Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910000599 Cr alloy Inorganic materials 0.000 description 3
- 229910000640 Fe alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000006399 behavior Effects 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005494 tarnishing Methods 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0236—Industrial applications for vehicles
Definitions
- the present invention relates to an electric heater and a
- Such heaters can be used, for example, in motor vehicles for heating (heating) the room air in the passenger compartment and for heating the battery, for preheating the cooling water of water-cooled engines, for preheating the spark plugs in auto-ignition internal combustion engines, for heating fuel, for thawing operating fluids such as or
- Headlight cleaning fluid and the urea solution of an SCR catalyst, etc. are used. Furthermore, such heaters can be used in so-called white goods such as a tumble dryer or a washing machine.
- heating circuits must be heated due to lack of or only temporarily available heat sources, such as an internal combustion engine.
- the heating circuits are water circuits or a
- Security provides and in which in particular undesirable tarnishing behavior is avoided or reduced. It is a further object of the invention to provide a method for detecting overheating of such an electric heater.
- the heater according to the invention for heating fluid streams in particular of liquid such as water or water-glycol mixtures, has a heating element, a control device for controlling a heat output generated by the heating element and a
- the heating element has an inductance which varies as a function of the temperature.
- the inductance increases up to a limit temperature.
- Overheat detection means is configured to detect a change in the current flowing through the heating element caused by a change in the inductance of the heating element, with one in advance
- Limit can detect overheating of the electric heater or its heating element by changing the current flowing through the heating element current. Overheating can occur in particular when the electric heater is running dry, ie, for example, in the event of a fault, the fluid does not flow around it. By recognizing overheating can thus also a Dry run can be detected.
- Heating element caused change of the current flowing through the heating element is also understood as the detection of a physical quantity from which this current or its change can be derived, in particular a physical quantity which is proportional to the current or its change.
- a physical quantity which is proportional to the current or its change.
- the physical quantity is the voltage across the shunt resistor which is proportional to the current flowing through the heating element.
- Control device may be designed to control the heat output generated by more than one heating element. Accordingly, the
- Overheat detection means configured to detect a change in the respective inductances of a plurality of heating elements caused changes in the currents flowing through the plurality of heating elements and to evaluate them, as explained above for a heating element by limiting value comparison with respect to overheating.
- Heating element have a resistance that can also change with temperature.
- the heating element preferably comprises a material whose relative permeability increases up to a limit temperature.
- the increase of the relative permeability of the heating element with increasing temperature results in an increase of the inductance of the heating element with increasing temperature.
- the heating element consists of such a material.
- the heating element comprises a ferromagnetic material.
- Ferromagnetic material is characterized by a particularly high relative permeability of ⁇ »1.
- the heating element is made such a ferromagnetic material.
- ferromagnetic material are, for example, iron, nickel and / or cobalt in question.
- alloys comprising iron, nickel and / or cobalt are suitable with a relative permeability of pr »1.
- an alloy of iron, chromium and aluminum can be used.
- the electric heater according to the invention is preferably as
- the Heating element is preferably designed as a heating wire.
- Heating wires made of the above-mentioned materials, in particular alloys of iron, chromium and aluminum, are advantageously standard heating wires, which are freely available on the market.
- the heater according to the invention for example, supplied with a voltage from a vehicle electrical system of a vehicle, therefore, a Bordnetzwellmaschine when starting the electric heater in comparison to PTC resistance heating wires using heaters can be reduced and thus improved. Furthermore, higher operating points can be achieved than with the use of PTC resistance heating wires. Thus, for example, when using a heating wire made of an alloy of iron, chromium and aluminum as a heating element, a maximum operating point of 1350 ° C can be achieved, resulting in a higher power density and a longer life. Furthermore, heating elements made of the materials mentioned by a minimum thermal capacity and inertia, which allows rapid detection of overheating.
- the overheating detection device of the electric heater according to the invention, the functional safety of the electric heater can be ensured.
- the overheat detection device determines whether the values determined by the Temperature-induced change in the inductance caused change in the current of the heating element exceeds a permissible value, so that overheating of the electric heater is detected and corresponding
- Measures such as switching off the electric heater can be initiated.
- the sensor element corresponds to the heating element. That
- the heating element is not only used for heating, but also for detecting overheating.
- a component, namely the heating element, can thus be used for two different purposes.
- the overheating detecting means of the electric heater according to the invention preferably comprises a current measuring means for measuring the current flowing through the heating element, a differentiator for detecting a change in the current flowing through the heating element, a peak detector for detecting a maximum change in the current through the heating element
- the overheating detection device is furthermore preferably designed such that it switches off the electric heater when initiating overheating or initiates a shutdown. For this purpose, the
- Comparing means send a signal to the controller of the electric heater, which causes the control device to turn off the electric heater.
- the current flowing through the heating element is also understood to mean a physical quantity, from which this current can be derived, in particular one which is proportional to this current
- Overheating detection means may further comprise an amplifier.
- the inventive method for detecting overheating of an electric heater is one of a change of Inductance of the heating element caused change in the current flowing through the heating element determined, compared the determined change in the current flowing through the heating element with a pre-defined limit and found when exceeding the predefined limit overheating.
- a pre-defined limit Preferably, upon detection of overheating of the electric heater is turned off via the control device.
- the current flowing through the heating element is measured, for determining the change of the current flowing through the heating element, the derivative thereof is formed, wherein the
- Derivative represents the change in the current, the peak value of the derivative of the current flowing through the heating element determined and the determined
- Peak value compared to the pre-defined limit As explained above, the current flowing through the heating element is also understood to be a physical quantity from which this current can be derived.
- Fig. 2 is a schematic diagram of an inventive
- Fig. 3 is a schematic representation of a
- FIG. 4 shows a flowchart of a method according to the invention for Detecting overheating of an electric heater according to the invention.
- Dimensions given in the figures are purely exemplary in nature.
- the electric heater 1 according to the invention is preferably designed as a water heater, as e.g. is provided in the circulation of an operating fluid, such as cooling water, in a vehicle.
- the electric heater 1 is preferably designed as a tubular heating element (RHK) or a cylindrical heating element with a wire-shaped heating element 2 (cf., FIG. 2).
- RHK tubular heating element
- a corresponding water heater is known, for example, from DE 10 2010 060 446 A1 of the Applicant, so that with regard to the specific construction of the water heater, reference may be made to the statements in this document.
- the concrete structure plays only one
- the electrical heater 1 is preferably supplied with voltage from a vehicle electrical system of a vehicle, the vehicle electrical system voltage in particular being a high-voltage voltage used in a vehicle, which is typically between approximately 120 V and approximately 450 V.
- the heating element 2 (and thus the electric heater 1) has an inductance L (also called inductance L_RHK), which increases with increasing temperature.
- Figure 1 shows an example of a course of a temperature-dependent inductance of the electric heater 1 designed as a tubular heater over the temperature. As shown in Figure 1, the inductance increases up to one
- FIG. 2 shows an embodiment of the electric heater 1 according to the invention.
- the electric heater 1 has a heating element 2 which has an inductance L RHK and a resistance R RHK connected in series.
- the inductance L_RHK is temperature dependent and increases with increasing temperature on.
- the heating element 2 is preferably made of ferromagnetic material having a relative permeability ⁇ cauliflower
- the heating element 2 is connected to a supply voltage U_HV, e.g. A voltage of a vehicle electrical system or a battery of a vehicle, and to the other terminal via a switch SW1 to ground (in Figure 2: reference potential "0") .
- U_HV supply voltage
- the series circuit of inductance L_RHK and resistor R_RHK is preferably a diode D1 connected in parallel
- the cathode of the diode D1 is connected to the
- the switch SW1 is formed, for example, as a transistor circuit, and its state is controlled by the control device 3.
- the switch SW1 may be part of the control device 3. Is the switch SW1 in
- the control device 3 is preferably designed as power electronics in the form of a pulse width modulation (PWM) circuit, which at preferably constant frequency or period duration, the duty cycle of a rectangular pulse, i. controls the width of the square pulse forming pulses, the square pulse forms the input and control signal for the switch SW1.
- PWM pulse width modulation
- the electric heater 1 according to the invention further comprises a
- Overheat detection device 4 for detecting overheating of the electric heater 1 or its heating element 2 (see Figures 2 and 3a)).
- the overheat detection device 4 preferably comprises a
- the current measuring device 5 measures a current flowing through the heating element 2.
- the current measuring device 5 is preferably formed by a shunt resistor R_Shunt (Rshunt in Figure 3a)), which is connected in series with the heating element 2 and is connected between the switch SW1 and the ground 0.
- the current flowing through the shunt resistor R_Shunt causes at this a voltage drop (voltage Ushunt in FIG. 3), which is proportional to the current flowing through the heating element 2. That the voltage Ushunt dropped across the shunt resistor R_Shunt is proportional to the current ⁇ ⁇ flowing through the heating element 2. Changes
- the edge steepness of the current pulses of the current IHeiz is dependent on the size of the inductance L_RHK of the heating element 2, which in turn depends on the temperature. Accordingly, the slope is the of the
- Current measuring device 5 detected pulses of the voltage Ushunt on the size of the inductance L RHK of the heating element 2, since the voltage Ushunt is proportional to the current flowing through the heating element 2 ⁇ . If the heater 1 according to the invention is supplied with an alternating voltage, such as
- a measuring bridge circuit which the phase difference or the zero crossing of the current through the
- Heating element measures.
- Heating element 2 is lower than normally without overheating, is
- Overheat detection device 4 on a differentiator 6 The
- Differentiator 6 determines the change in the current iHeiz or the voltage Ushunt, which follows in particular from a temperature-dependent change in the inductance L_RHK of the heating element 2.
- the differentiator 6 forms the derivative of the voltage Ushunt, which is proportional to the derivative of the current IHeiz and which is referred to in Figure 3 as UDitr.
- the differentiator 6 may be formed, for example, as a high-pass circuit with a capacitor C1 and a resistor R1, wherein a terminal of the capacitor C1 to an unspecified node between the switch SW1 and the shunt resistor R_Shunt and the other terminal of the capacitor C1 to the resistor R1 is connected, which in turn is connected to the other terminal to ground.
- Differentiator 6 is higher in magnitude in the event of a fault overheating than in the normal case (see Figures 3b) and 3c)) because of the higher edge steepness of the voltage Ushunt.
- the differentiator an amplifier 7 is connected downstream, which by a
- Operational amplifier 10 can be realized, which is operated with a supply voltage VCC.
- the operational amplifier 10 is preferably as
- Operational amplifier 10 corresponds to the amplified output voltage UDiff of the differentiator 6, wherein the output voltage Uverst of the amplifier 7 in the event of an error of overheating in terms of magnitude higher in the normal case (see Figures 3b) and 3c)).
- the amplifier 7 can be so
- the amplifier 7 is followed by a peak detector 8, which determines the maximum change, in particular the maximum derivative, of the current iHeiz flowing through the heating element 2 during operation.
- the peak detector 8 determines the maximum value of
- the peak detector 8 has the output voltage Uverst as
- the peak detector 8 has a diode D2 for rectifying the output voltage Uverst of the amplifier 7, wherein the anode of the diode D2 is connected to the output of the amplifier 7 and the cathode of the diode D1 to a terminal of a resistor R4 of the peak detector 8. The other terminal of the resistor R4 is connected to a terminal of a
- Condenser C2 of the peak detector 8 is connected, whose other terminal is grounded.
- the voltage U peak falling across the capacitor C2 corresponds to the peak value of the voltage Uverst after one period of the voltage Uverst.
- the output voltage Uverst of the amplifier 7 ie the amplified output voltage UDOT of the differentiator 6
- the output voltage Uverst of the amplifier 7 is greater than the output voltage Uverst of the amplifier 7 in the normal case. Accordingly, the output voltage is US P it ze of
- Peak detector 8 at an overheating greater than normal see Figures 3b) and 3c)).
- the peak detector 8 is a comparator 9
- a microcontroller 11 which comprises a working and program memory (not shown, hereinafter referred to as: memory).
- the microcontroller 11 is connected between the resistor R4 and the capacitor C2 of the peak detector 8.
- a predefined limit value for overheating detection is preferably stored, with which the output voltage U peak of the peak value detector 8 is compared.
- the comparison device 9 or its microcontroller 11 leads
- Peak detector 8 by that it compares the peak voltage U peak with the pre-defined limit (in Figure 3: error threshold).
- the comparison can be carried out by a stored in the memory of the microcontroller 11 program.
- the limit value is defined in advance such that a
- Exceeding the limit value means overheating of the electric heater 1 or of its heating element 2. If the peak value Uspitze exceeds the predefined limit value, then the comparison device 9 (and thus the overheating detection device 4) determines overheating of the electrical heater 1. If the peak value U peak is below the limit value or if the peak value U peak is equal to the limit value, then the comparison device 9 determines that the electrical heater 1 is in the normal state and there is no overheating. In the case of overheating controls the comparator 9 and their
- Microcontroller 11 the control device 3 of the electric heater 1 preferably in such a way that it opens the switch SW1 and thus the power supply of the heating element 2 interrupts to ensure the functional safety.
- FIG. 4 shows a flow chart of a preferred embodiment of the inventive method for detecting overheating of an electric heater 1 according to the invention, as shown by way of example in FIG. 2
- step 20 the current flowing through the heating element 2 I Wien or a physical quantity from which this current is derivable, such as the voltage Ushunt on the shunt resistor R_Shunt (also: Rs unt) of
- Overheat detection device 4 measured.
- step 21 is for determining a change, in particular a temperature-induced change, by the heating element 2 flowing current i heating the derivative of the current iHeiz determined by means of a differentiator 6 of the overheat detection device 4.
- the determined change in the current IHeiz is amplified by an amplifier 7 of the overheating detection device 4.
- step 23 the peak value of the derivative of the current IHeiz determined in step 21 and amplified in step 22 is determined by means of a
- Peak value detector 8 of the overheating detection device 4 determined.
- the determined peak value is compared with the predefined limit value with the aid of the comparison device 9 of the overheating detection device 4. If the peak exceeds the limit, then the
- Comparative device 9 and the overheat detection device 4 in step 24 determines that there is an overheating of the electric heater 1.
Landscapes
- Control Of Resistance Heating (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016216295.0A DE102016216295A1 (en) | 2016-08-30 | 2016-08-30 | ELECTRIC HEATER AND METHOD FOR DETECTING OVERHEATING OF SUCH ELECTRIC HEATER |
PCT/EP2017/071567 WO2018041787A1 (en) | 2016-08-30 | 2017-08-28 | Electric heater and method for detecting overheating in such an electric heater |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3508029A1 true EP3508029A1 (en) | 2019-07-10 |
EP3508029B1 EP3508029B1 (en) | 2023-09-06 |
Family
ID=59738353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17758537.9A Active EP3508029B1 (en) | 2016-08-30 | 2017-08-28 | Electric heater and method for detecting overheating in such an electric heater |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3508029B1 (en) |
CN (1) | CN109644525B (en) |
DE (1) | DE102016216295A1 (en) |
WO (1) | WO2018041787A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3088121B1 (en) * | 2018-11-06 | 2020-11-13 | Valeo Systemes Thermiques | OVERHEATING DETECTION PROCEDURE FOR A HEATING DEVICE AND RELATED CONTROL UNIT |
FR3088120A1 (en) * | 2018-11-06 | 2020-05-08 | Valeo Systemes Thermiques | OVERHEAT DETECTION METHOD FOR HEATING DEVICE AND CORRESPONDING CONTROL UNIT |
FR3088122B1 (en) * | 2018-11-06 | 2021-01-22 | Valeo Systemes Thermiques | OVERHEATING DETECTION PROCEDURE FOR A HEATING DEVICE AND RELATED CONTROL UNIT |
DE102019200111A1 (en) | 2019-01-08 | 2020-07-09 | Audi Ag | Circuit arrangement and method for clocked switching of an electrical consumer in a motor vehicle and corresponding motor vehicle |
FR3101446B1 (en) * | 2019-10-01 | 2021-10-01 | Valeo Systemes Thermiques | Thermal management method, in particular for a motor vehicle, and associated control unit |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006049395A1 (en) * | 2006-10-19 | 2008-04-24 | BSH Bosch und Siemens Hausgeräte GmbH | Method for protecting a heating element and heating device |
EP1932699B1 (en) * | 2006-12-12 | 2010-02-24 | Behr France Rouffach SAS | Method for testing the operation of an electric heating device, in particular for a motor vehicle |
DK2499436T3 (en) | 2009-11-09 | 2016-07-18 | Dbk David + Baader Gmbh | Electric heating device |
DE102010000954A1 (en) * | 2010-01-15 | 2011-07-21 | DBK David + Baader GmbH, 76870 | Electronic control device |
US8884198B2 (en) * | 2010-01-22 | 2014-11-11 | Continental Automotive Systems, Inc. | Parametric temperature regulation of induction heated load |
GB2512042A (en) * | 2012-12-31 | 2014-09-24 | Continental Automotive Systems | Resistance determination with increased sensitivity for temperature control of heated automotive component |
CN103308777B (en) * | 2013-05-29 | 2016-02-03 | 漳州师范学院 | The measuring method of electric capacity and inductance |
DE102014108074A1 (en) | 2014-06-06 | 2015-12-17 | Dbk David + Baader Gmbh | Heating module and tank system |
DE102014214690A1 (en) * | 2014-07-25 | 2016-01-28 | Contitech Techno-Chemie Gmbh | Heated hose |
DE102016109039A1 (en) * | 2016-02-17 | 2017-08-17 | Dbk David + Baader Gmbh | Electric device, in particular heater, and device and method for controlling an electrical device |
-
2016
- 2016-08-30 DE DE102016216295.0A patent/DE102016216295A1/en active Pending
-
2017
- 2017-08-28 CN CN201780053109.3A patent/CN109644525B/en active Active
- 2017-08-28 EP EP17758537.9A patent/EP3508029B1/en active Active
- 2017-08-28 WO PCT/EP2017/071567 patent/WO2018041787A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN109644525B (en) | 2022-08-09 |
EP3508029B1 (en) | 2023-09-06 |
CN109644525A (en) | 2019-04-16 |
WO2018041787A1 (en) | 2018-03-08 |
DE102016216295A1 (en) | 2018-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3508029B1 (en) | Electric heater and method for detecting overheating in such an electric heater | |
DE4141837B4 (en) | Device for controlling a generator | |
EP3417672B1 (en) | Electrical device, in particular heater, device and method to control an electrical device | |
DE112018007053T5 (en) | Vehicle Mounted Charger and Control Method for a Vehicle Mounted Charger | |
DE2452121A1 (en) | CURRENT LIMITING SYSTEM FOR DC MOTOR CONTROLS | |
DE112008003096T5 (en) | Cable protection method and cable protection device | |
DE202016001563U1 (en) | Battery connection system and battery pack | |
WO2008110143A1 (en) | Method and device for glowplug ignition control | |
DE102015108888B4 (en) | Overheating detection device for an electric motor, equipped with several PTC thermistors | |
DE102011085082B3 (en) | Method and circuit for determining the temperature of a fuel injection valve and method for controlling the temperature of a fuel injection valve | |
DE102016217660A1 (en) | High voltage biasing system | |
EP2805869A1 (en) | Heating device for motor vehicles, seat heater and steering wheel heater with such a heating device and method for controlling the temperature of a heating device for motor vehicles | |
WO2019206964A1 (en) | Method for reducing a temperature increase in a controllable switching element | |
WO2009097922A1 (en) | Method for monitoring at least one glow plug of an internal combustion engine and corresponding device | |
DE102012214717A1 (en) | Method for controlling power or voltage of load e.g. electric heater of diesel engine to monitor exhaust gas composition, involves changing duty factor of pulse width modulation such that actual voltage corresponds to reference voltage | |
DE102008000784A1 (en) | Electric motor with a temperature detection and method for detecting a temperature in an electric motor | |
DE102006020579A1 (en) | Method and circuit arrangement for controlling a drying process of a domestic appliance for the care of items of laundry | |
DE102014201973B4 (en) | Elektromagnetventilansteuervorrichtung | |
WO2011039006A1 (en) | Method for protecting a motor vehicle generator from overheating | |
DE10156037A1 (en) | Method for monitoring operation of heater element of motor vehicle interior heater based on comparing actual resistance of heater elements against known resistance temperature characteristic | |
WO2021058302A1 (en) | Method and device for determining an item of temperature information describing a temperature of a resistance temperature detector, inverter, vehicle and computer program | |
DE102014212377B4 (en) | Method for determining a state of an injection valve | |
DE102016210372A1 (en) | VOLTAGE CONTROL DEVICE FOR A SENSOR | |
DE102020125642A1 (en) | System, method and computer program product for monitoring the cooling performance for a semiconductor pulse-controlled inverter | |
EP2551736B1 (en) | Method for testing a control device for at least one PTC heating element or a PTC heater for a vehicle and control device for at least one PTC heating element of a PTC heater for a vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
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 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20190320 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL 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 RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
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: EXAMINATION IS IN PROGRESS |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20210125 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20230411 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230525 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL 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 RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502017015343 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20230906 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231207 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231207 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240106 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240108 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230906 |