WO2015010842A1 - Système de gestion de résistance chauffante à coefficient de température positif d'un équipement de chauffage électrique auxiliaire de véhicule automobile - Google Patents
Système de gestion de résistance chauffante à coefficient de température positif d'un équipement de chauffage électrique auxiliaire de véhicule automobile Download PDFInfo
- Publication number
- WO2015010842A1 WO2015010842A1 PCT/EP2014/063198 EP2014063198W WO2015010842A1 WO 2015010842 A1 WO2015010842 A1 WO 2015010842A1 EP 2014063198 W EP2014063198 W EP 2014063198W WO 2015010842 A1 WO2015010842 A1 WO 2015010842A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- peak current
- heating
- current
- value
- duty cycle
- 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.)
- Ceased
Links
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
-
- 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
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/02—Heaters using heating elements having a positive temperature coefficient
Definitions
- the invention relates to an auxiliary electric heating equipment of a motor vehicle for providing a temporary heat input when the engine of the vehicle is not yet hot enough to achieve this contribution.
- Such auxiliary heating equipment serves for example to quickly bring the heat to demist the windows of the vehicle when the user has just started. It comprises heating rods which for security reasons are formed of electrical resistors with a positive temperature coefficient.
- a positive temperature coefficient resistor has a resistivity that increases when its temperature increases, which limits the risk of heating or fire in case of electrical malfunction. This is why it is mandatory to use this type of resistance for motor vehicle heating systems.
- the design of a heating equipment is carried out for given conditions, such as a predetermined air flow rate of 300 kg per hour cooling the heating bars, this air having a given temperature equal for example 0 ° C. .
- the amount of heat produced by such equipment is controlled by a control electronics which regulates the amount of average current injected into the heating bars by alternately turning them on and off, according to an adjustable duty cycle.
- the user acts on a controller that conditions the value of the duty cycle.
- the object of the invention is to propose a solution to remedy this drawback.
- the subject of the invention is an auxiliary electric heating equipment of a motor vehicle, comprising one or more heating bars comprising resistors with a positive temperature coefficient, and a power electronics stage alternately energizing and de-energizing.
- each heating bar according to a duty cycle adjustable by control means, characterized in that it comprises means for limiting the effective current of the current through the power electronics stage, by measuring the peak current through at least one heating rod and comparing the measured peak current value with a peak current read value in a table for the current duty cycle, and lowering the duty cycle in case of measured peak current greater than the current value crest read in the look-up table, the peak current value read in the correlation table this corresponds to the value of maximum effective current allowed by the control unit for the duty cycle considered.
- This solution limits the rms current in the control unit by making peak current measurements that are simpler to implement. as current measurements taking into account the significant noise existing in the current signal.
- the invention may also comprise means for measuring the instantaneous current passing through a bar and a microcontroller connected to these measurement means for interrogating them cyclically so as to store a maximum instantaneous current value corresponding to the peak current measured, and in which the correspondence table is stored in the microcontroller.
- the invention also comprises several heating bars as well as means for measuring the instantaneous current in each bar.
- the invention also comprises several heating bars, as well as means for phase shifting the switching on and off of the various heating bars so as to limit the peak current in the control unit during operation.
- the invention comprises three heating bars as well as means for phase shifting by one-third of a period the switching on and off of these three heating bars.
- the object of the invention is to limit the rms current in the heating bars to a predetermined threshold by lowering the duty cycle, while measuring the value of the peak current, and using a correspondence table giving for different values of duty cycle. , the peak current value corresponding to the predetermined threshold of effective current.
- the correspondence table is for example established from tests and measurements on a bench, in which each heating bar of an equipment is alternately switched on and off according to several duty cycle values, this bench being equipped with means for cool the bars in a controlled manner.
- the voltage is a nominal DC voltage of, for example, 13 volts, and the switching on and off frequency is a low frequency of, for example, 20 Hz.
- the various duty cycle values chosen are for example 50%, 60%, 70%. %, 80%, 90%. This test makes it possible to identify for each duty cycle value the value of the permissible peak current, that is to say the value peak current corresponding to the predetermined threshold of acceptable rms current (for example 1 1 1 amps) by the control electronics.
- the bench makes it possible to measure the effective current flowing through the power electronics of the heating equipment, and the peak current which is established in a bar when it is switched on, each measurement being for example carried out on a series of cycles.
- the peak current, or inrush current corresponds to the peak current that is established on the bar in the moments after power on, before stabilizing the current to a nominal value.
- the effective current flowing through the power electronics is then measured. If the rms value is lower than the predetermined threshold of 1 1 1 amp, the bench is controlled to lower the temperature of the bars. This lowering temperature has the effect of reducing the electrical resistance of the bars, and thereby increase the value of the effective current flowing through the power electronics and each bar.
- the temperature of the bars is thus adjusted by controlling their cooling, until the measured effective current has a value corresponding to the predetermined threshold, namely 11 amperes, the duty cycle being maintained at 90%.
- the bench is controlled to measure the value of the peak current in each bar, that is to say the maximum value that the instantaneous current takes in the instants which follow its power-up, with each cycle.
- This peak current value here 40.5 amperes is then stored in the correspondence table in association with the value of 90% duty cycle, and it constitutes the peak current value in a bar corresponding to the predetermined threshold of acceptable current by the power electronics. In other words, if the peak current value became greater than 40.5 amperes at 90% duty cycle, then the current in the power electronics would become greater than the threshold value of 11 amps.
- Such tests thus make it possible to establish a correspondence table giving, for each duty cycle value, the peak current value in a bar which corresponds to the effective current threshold allowed by the power electronics.
- a look-up table can be established from tests, but it can possibly be as well established from a numerical simulation of the functioning of the components.
- This correspondence table thus makes it possible to control the auxiliary heating apparatus so as to eliminate the risk of overcurrent.
- the apparatus or its power electronics is thus equipped with means for measuring the peak current in at least one bar, or even in each bar, which will make it possible to determine in a simple but precise manner whether the current value E effective in electronics is acceptable or not, so as to lower the duty cycle to reduce the rms current if it is too high.
- the current measuring means comprise for each bar a probe for determining the instantaneous current value passing through the bar.
- These probes are connected to a unit of microcontroller type or the like, capable of performing calculations and in which the correspondence table is stored.
- the microcontroller regularly interrogates the probes, for example every 50 ms, and it always records the last maximum value, thanks to an appropriate algorithm, which in fact enables it to simply and reliably measure a peak current. the highest in the different bars.
- the microcontroller reads the value of the duty cycle which is applied to the heating rods by the control, and reads in the correspondence table the permissible peak current value, for the duty cycle in question. The microcontroller then compares the measured peak current value with the permissible peak current value.
- the measured peak current value is lower than the permissible peak current value, this means that the effective current in the control electronics E is lower than the predetermined threshold. There is no risk of damage, so that the microcontroller does not act on the control electronics.
- the microcontroller acts on the control of the control electronics E to reduce the duty cycle by 10%.
- the microcontroller performs further measurements to similarly determine whether the peak current value is greater than the permissible peak current value for the new duty cycle. If so, it will reorder the control electronics to reduce the duty cycle by an additional 10%. At the end of several iterations of the algorithm, the duty cycle is sufficiently reduced so that the value of the effective current in the power electronics E becomes lower than the predetermined threshold value.
- this table shows that the value of peak current increases when the duty cycle decreases, if the temperature of the bars is very low.
- the peak current value in each bar, and therefore in each powering transistor associated with each bar reaches 60.2 amps, which may correspond to an operating limit for these transistors.
- the microcontroller can be used to prohibit operation of the equipment when the peak current value is greater than 60.2 amperes.
- the currents in the three bars are out of phase by a third of a period.
- the peak or maximum current value IcE in the control unit E is of the order of three times the peak current value in each bar when the duty cycle is greater than two thirds (66% ) since there then necessarily exist time intervals during which the three bars are simultaneously under tension.
- the maximum peak current value in the control unit E is of the order of only twice the peak current value in each bar, because There are no intervals where the three bars are energized, but only intervals where two or more bars are energized.
- phase shift of the various bars thus smooths the current in the control unit E and limits the value of peak current that it undergoes, without impact on the thermal efficiency of the equipment.
- the invention thus makes it possible to limit the value of effective current in the equipment while making simple current measurements since it is only a question of measuring maximum values of instantaneous current.
- the invention makes it possible to take into account the effective current of a very noisy signal, without having to implement a real measurement of effective current which is in itself expensive to implement.
Landscapes
- Control Of Resistance Heating (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14735493.0A EP3025561B1 (fr) | 2013-07-22 | 2014-06-23 | Système de gestion de résistance chauffante à coefficient de température positif d'un équipement de chauffage électrique auxiliaire de véhicule automobile |
| US14/906,931 US20160157299A1 (en) | 2013-07-22 | 2014-06-23 | System For Managing A Heating Resistor With A Positive Temperature Coefficient Of Auxiliary Electric Heating Equipment Of A Motor Vehicle |
| CN201480048565.5A CN105519234B (zh) | 2013-07-22 | 2014-06-23 | 用于控制机动车辆的辅助电加热设备的具有正温度系数的加热电阻器的系统 |
| KR1020167004265A KR101837321B1 (ko) | 2013-07-22 | 2014-06-23 | 차량의 보조 전기 가열 장비의 정온도 계수를 갖는 가열 저항을 관리하기 위한 시스템 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1357175A FR3008844B1 (fr) | 2013-07-22 | 2013-07-22 | Systeme de gestion de resistance chauffante a coefficient de temperature positif d'un equipement de chauffage electrique auxiliaire de vehicule automobile |
| FR1357175 | 2013-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015010842A1 true WO2015010842A1 (fr) | 2015-01-29 |
Family
ID=49151237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2014/063198 Ceased WO2015010842A1 (fr) | 2013-07-22 | 2014-06-23 | Système de gestion de résistance chauffante à coefficient de température positif d'un équipement de chauffage électrique auxiliaire de véhicule automobile |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20160157299A1 (fr) |
| EP (1) | EP3025561B1 (fr) |
| KR (1) | KR101837321B1 (fr) |
| CN (1) | CN105519234B (fr) |
| FR (1) | FR3008844B1 (fr) |
| WO (1) | WO2015010842A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220144030A (ko) | 2021-04-16 | 2022-10-26 | 삼성전자주식회사 | 식기세척기 및 식기세척기의 제어방법 |
| CN114034912B (zh) * | 2021-11-08 | 2022-07-19 | 湖南大学 | 基于大电流饱和压降的igbt结壳热阻测量方法 |
| CN116600422A (zh) * | 2023-06-06 | 2023-08-15 | 新疆晶硕新材料有限公司 | 一种控制硅钼棒加热的方法、装置及设备 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6998584B1 (en) * | 2004-09-03 | 2006-02-14 | Caterpillar Inc. | System for output power control on electric heater drive |
| EP2315493A1 (fr) * | 2009-10-21 | 2011-04-27 | Behr France Rouffach SAS | Dispositif de chauffage notamment pour une climatisation de véhicule automobile |
| DE102011007817A1 (de) * | 2011-04-20 | 2012-10-25 | Webasto Ag | Elektrische Heizung, Fahrzeug mit elektrischer Heizung sowie Verfahren zum Steuern einer elektrischen Heizung |
| WO2013018919A1 (fr) * | 2011-08-04 | 2013-02-07 | 三菱重工業株式会社 | Dispositif, procédé et programme de commande de dispositif de chauffage |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5032705A (en) * | 1989-09-08 | 1991-07-16 | Environwear, Inc. | Electrically heated garment |
| US5280422A (en) * | 1990-11-05 | 1994-01-18 | Watlow/Winona, Inc. | Method and apparatus for calibrating and controlling multiple heaters |
| US6111215A (en) * | 1998-10-23 | 2000-08-29 | Lilly; Leslie G. | Minature battery powered arc welder |
| KR101014494B1 (ko) * | 2008-12-05 | 2011-02-14 | 현대자동차주식회사 | 피티씨 히터 |
| JP5875278B2 (ja) * | 2011-08-04 | 2016-03-02 | 三菱重工業株式会社 | ヒータ制御装置及びその制御方法並びにその制御プログラム |
-
2013
- 2013-07-22 FR FR1357175A patent/FR3008844B1/fr not_active Expired - Fee Related
-
2014
- 2014-06-23 WO PCT/EP2014/063198 patent/WO2015010842A1/fr not_active Ceased
- 2014-06-23 EP EP14735493.0A patent/EP3025561B1/fr not_active Not-in-force
- 2014-06-23 CN CN201480048565.5A patent/CN105519234B/zh not_active Expired - Fee Related
- 2014-06-23 KR KR1020167004265A patent/KR101837321B1/ko not_active Expired - Fee Related
- 2014-06-23 US US14/906,931 patent/US20160157299A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6998584B1 (en) * | 2004-09-03 | 2006-02-14 | Caterpillar Inc. | System for output power control on electric heater drive |
| EP2315493A1 (fr) * | 2009-10-21 | 2011-04-27 | Behr France Rouffach SAS | Dispositif de chauffage notamment pour une climatisation de véhicule automobile |
| DE102011007817A1 (de) * | 2011-04-20 | 2012-10-25 | Webasto Ag | Elektrische Heizung, Fahrzeug mit elektrischer Heizung sowie Verfahren zum Steuern einer elektrischen Heizung |
| WO2013018919A1 (fr) * | 2011-08-04 | 2013-02-07 | 三菱重工業株式会社 | Dispositif, procédé et programme de commande de dispositif de chauffage |
| US20130341318A1 (en) * | 2011-08-04 | 2013-12-26 | Mitsubishi Heavy Industries Automtive Thermal Systems Co., Ltd. | Heater control device, method and program |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20160034976A (ko) | 2016-03-30 |
| EP3025561B1 (fr) | 2017-07-12 |
| KR101837321B1 (ko) | 2018-03-09 |
| FR3008844A1 (fr) | 2015-01-23 |
| EP3025561A1 (fr) | 2016-06-01 |
| FR3008844B1 (fr) | 2015-08-07 |
| US20160157299A1 (en) | 2016-06-02 |
| CN105519234A (zh) | 2016-04-20 |
| CN105519234B (zh) | 2019-04-30 |
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