EP1989605B1 - Electronic device for regulating the voltage across a high-side load - Google Patents
Electronic device for regulating the voltage across a high-side load Download PDFInfo
- Publication number
- EP1989605B1 EP1989605B1 EP07711183A EP07711183A EP1989605B1 EP 1989605 B1 EP1989605 B1 EP 1989605B1 EP 07711183 A EP07711183 A EP 07711183A EP 07711183 A EP07711183 A EP 07711183A EP 1989605 B1 EP1989605 B1 EP 1989605B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- transistor
- base
- emitter
- resistor
- 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.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/08—Regulating voltage or current wherein the variable is dc
- G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
- G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
- G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
Definitions
- the invention relates to an electronic device for regulating the voltage across a high-side load, in particular for controlling a fan in a motor vehicle.
- control device An important basic function of the control device is the regulation of the motor voltage as a function of a control signal.
- This control signal can be an analog control voltage, an analog control current or be a digital signal.
- Control units for blowers according to the prior art teach internally control currents and digital control signals in a control voltage, so that in principle there is always a control loop that controls the motor voltage in response to a control voltage.
- FIG. 2 Known linear control devices for blowers generally use the in FIG. 2 illustrated circuit topology.
- a vehicle battery V2 supplies the power supply for the entire arrangement.
- V1 supplies the control voltage.
- U mot is the motor voltage.
- An operational amplifier U1A sets its output voltage and thus the gate-source voltage of the Mostransistors M1 so that U + is approximately equal to U-.
- U mot is largely independent of V2.
- the operational amplifier regulates on-board voltage fluctuations.
- V1 0.
- the current consumption Ib of the arrangement is referred to as quiescent current and should be as low as possible in order not to discharge the battery V2.
- Ib I1 + I2 + I3.
- I3 can be kept at a very low level by using an ultra low power opamp.
- the invention is based on the object to develop a control device that allows to use even at low quiescent current comparatively low-resistance resistors, with thermal influences to the reference variable to be compensated.
- the invention enables the construction of a control device, in particular for a fan with comparatively few discrete components.
- the control device is characterized by good control behavior and an extremely low quiescent current consumption.
- the compensation of the temperature influences of the base-emitter voltage of the first transistor is effected by the base-emitter path of a second transistor of the same conductivity type in series with the first transistor.
- control voltage V1 which is referred to ground
- the control voltage V1 does not in this arrangement, as in the circuit diagram of the known control device (see FIG. 2 ), ground-related to the control amplifier, but mirrored to the positive supply voltage.
- the input voltages U + and U- of the control operation amplifier are not as in FIG. 2 , to ground, but based on the positive potential of the supply voltage V2.
- the control voltage V1 is applied to the base of a common-emitter transistor Q1.
- the voltage U- now approximates the input voltage V1 amplified by R2 / R1.
- V1 is related to ground, U- to the positive potential of V2. Due to the arrangement, V1 is therefore mirrored from the ground reference potential to the positive supply potential.
- U mot V 1 ⁇ R 3 + R 4 R 3 and thus independent of V2.
- the quiescent current of the circuit can be given only by the quiescent current of the regulator U1A.
- I1 and I2 do not burden battery V2 in idle mode.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Nonlinear Science (AREA)
- Control Of Direct Current Motors (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Voltage And Current In General (AREA)
Description
Die Erfindung betrifft eine elektronische Einrichtung zur Regelung der Spannung über einer sich in High-Side befindlichen Last, insbesondere zur Regelung eines Gebläses in einem Kraftfahrzeug.The invention relates to an electronic device for regulating the voltage across a high-side load, in particular for controlling a fan in a motor vehicle.
Derartige Regeleinrichtungen sind durch ihre Verwendung in Kraftfahrzeugen allgemein bekannt.Such control devices are well known by their use in motor vehicles.
Durch die
Eine wichtige Grundfunktion der Regeleinrichtung stellt die Regelung der Motorspannung in Abhängigkeit von einem Steuersignal dar. Dieses Steuersignal kann eine analoge Steuerspannung, ein analoger Steuerstrom oder ein digitales Signal sein. Regeleinrichtungen für Gebläse nach der Lehre des Stands der Technik setzen intern Steuerströme und digitale Steuersignale in eine Steuerspannung um, sodass im Prinzip immer ein Regelkreis vorliegt, der die Motorspannung in Abhängigkeit von einer Steuerspannung regelt.An important basic function of the control device is the regulation of the motor voltage as a function of a control signal. This control signal can be an analog control voltage, an analog control current or be a digital signal. Control units for blowers according to the prior art teach internally control currents and digital control signals in a control voltage, so that in principle there is always a control loop that controls the motor voltage in response to a control voltage.
Bekannte lineare Regeleinrichtungen für Gebläse verwenden im Allgemeinen die in
Eine wesentliche Forderung an eine Regeleinrichtung für ein Gebläse ist die Ausregelung von Bordspannungsschwankungen. Umot sollte unabhängig von V2 sein. Dies gilt nur dann, wenn R1/R2 = R3/R4 ist. Das Verhalten der Regeleinrichtung gemäß
Der Zusammenhang Umot = f(V1) wird, ideale Bauteile und ideale Paarungstoleranz R1/R2 = R3/R4 vorausgesetzt, nur durch das Widerstandsverhältnis R1/R2 bestimmt. Umot ist weitgehend unabhängig von V2. Der Operationsverstärker regelt Bordspannungsschwankungen aus.The relationship U mot = f (V1), assuming ideal components and ideal mating tolerance R1 / R2 = R3 / R4, is determined only by the resistance ratio R1 / R2. U mot is largely independent of V2. The operational amplifier regulates on-board voltage fluctuations.
Im Standby-Betrieb ist V1 = 0. Die Stromaufnahme Ib der Anordnung wird in diesem Fall als Ruhestrom bezeichnet und sollte so gering wie möglich sein, um die Batterie V2 nicht zu entladen.In standby mode, V1 = 0. In this case, the current consumption Ib of the arrangement is referred to as quiescent current and should be as low as possible in order not to discharge the battery V2.
Im Fall V1 = 0 ist Umot = 0 und somit auch Id = 0 (moderne Mosfets weisen sehr kleine Sperrströme auf). Demnach ist Ib = I1 + I2 + I3. I3 kann durch die Verwendung eines Ultra-Low-Power-Opamps auf sehr niedrigem Niveau gehalten werden.In the case V1 = 0, U mot = 0 and thus also Id = 0 (modern MOSFETs have very small reverse currents). Thus, Ib = I1 + I2 + I3. I3 can be kept at a very low level by using an ultra low power opamp.
Möchte man aus Kostengründen auf einen Verguss der Reglerelektronik verzichten, so ist ein Einsatz hochohmiger Widerstände problematisch. Betauung und die damit verbundenen Verunreinigungen auf der Platinenoberfläche, die im Fahrzeug auftreten, führen zu Kriechströmen, welche die Funktion hochohmig dimensionierter Schaltkreise beeinflussen. R1 bis R4 können daher nicht beliebig hochohmig gemacht werden. Somit belasten I1 und I2 die Batterie im Standby- Betrieb.If, for reasons of cost, one wishes to forego encapsulation of the controller electronics, it is problematic to use high-resistance resistors. Condensation and the associated impurities on the Board surfaces that occur in the vehicle lead to leakage currents, which influence the function of high-impedance sized circuits. R1 to R4 can therefore not be made arbitrarily high impedance. Thus, I1 and I2 charge the battery in standby mode.
Der Erfindung liegt die Aufgabe zu Grunde, eine Regeleinrichtung zu entwickeln, die es erlaubt, auch bei geringer Ruhestromaufnahme vergleichsweise niederohmige Widerstände zu verwenden, wobei thermische Einflüsse auf die Führungsgröße kompensiert werden sollen.The invention is based on the object to develop a control device that allows to use even at low quiescent current comparatively low-resistance resistors, with thermal influences to the reference variable to be compensated.
Die Aufgabe wird durch eine Regeleinrichtung gemäß Patentanspruch 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den Patentansprüchen 2 bis 4 enthalten.The object is achieved by a control device according to claim 1. Advantageous developments of the invention are contained in the claims 2 to 4.
Die Erfindung ermöglicht den Aufbau einer Regeleinrichtung insbesondere für ein Gebläse mit vergleichsweise wenigen diskreten Bauteilen. Die Regeleinrichtung zeichnet sich durch gutes Regelverhalten und eine extrem kleine Ruhestromaufnahme aus. Die Kompensation der Temperatureinflüsse der Basis-Emitterspannung des ersten Transistors erfolgt durch die Basis-Emitter-Strecke eines zweiten Transistors vom gleichen Leitfähigkeitstyp in Serie zum ersten Transistor.The invention enables the construction of a control device, in particular for a fan with comparatively few discrete components. The control device is characterized by good control behavior and an extremely low quiescent current consumption. The compensation of the temperature influences of the base-emitter voltage of the first transistor is effected by the base-emitter path of a second transistor of the same conductivity type in series with the first transistor.
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und wird anhand der Figur der Zeichnung nachfolgend erläutert. Es zeigt:
- Figur 1
- einen Stromlaufplan einer erfindungsgemäßen Regeleinrichtung;
- Figur 2
- einen Stromlaufplan einer bekannten Regeleinrichtung.
- FIG. 1
- a circuit diagram of a control device according to the invention;
- FIG. 2
- a circuit diagram of a known control device.
Gemäß
Die Steuerspannung V1 wird der Basis eines in Emitterschaltung betrieben Transistors Q1 zugeführt. In dessen Emitterkreis wird ein Widerstand R1 und in dessen Kollektorkreis ein Widerstand R2 und in Reihe zu diesem die Basis-Emitterdiode eines weiteren Transistors Q2 geschaltet. Die Spannung U-, die über R2 und Q2 abfällt, ist nun gegeben durch U-=Ube(Q2) + R2/R1 *(V1-Ube(Ql)). Die Spannung U- entspricht nun genähert der um R2/R1 verstärkten Eingangsspannung V1.The control voltage V1 is applied to the base of a common-emitter transistor Q1. In the emitter circuit, a resistor R1 and in the collector circuit, a resistor R2 and in series to this the Base emitter diode of another transistor Q2 connected. The voltage U- which drops across R2 and Q2 is now given by U = Ube (Q2) + R2 / R1 * (V1-Ube (Q1)). The voltage U- now approximates the input voltage V1 amplified by R2 / R1.
Wählt man R1 = R2 und Q1 / Q2 mit gepaarten Eigenschaften, so ist U- ein exaktes Abbild von V1. Besonders vorteilhaft ist es, die beiden Transistoren Q1 und Q2 thermisch zu koppeln, dann ist die Bedingung Ube(Q1) = Ube(Q2) auch bei Temperaturschwankungen in guter Näherung erfüllt. V1 ist auf Masse, U- auf das positive Potential von V2 bezogen. Durch die Anordnung wird V1 daher vom Massebezugspotential auf das positive Versorgungspotential gespiegelt.If one selects R1 = R2 and Q1 / Q2 with paired properties, then U- is an exact image of V1. It is particularly advantageous to couple the two transistors Q1 and Q2 thermally, then the condition Ube (Q1) = Ube (Q2) is satisfied even with temperature fluctuations to a good approximation. V1 is related to ground, U- to the positive potential of V2. Due to the arrangement, V1 is therefore mirrored from the ground reference potential to the positive supply potential.
Die beiden Eingangspannungen des Reglers U1A können auf die positive Versorgungsspannung U2 bezogen sein. Damit, ist Umot gemäß dem Stromlaufplan nach
und somit unabhängig von V2.The two input voltages of the regulator U1A can be related to the positive supply voltage U2. Thus, U mot is according to the circuit diagram after
and thus independent of V2.
Widerstandspaarungstoleranzen gehen bei der Beziehung dUmot = f(dV2) im Gegensatz zum Stromlaufplan gemäß
Nach der Lehre der Erfindung werden daher Bordspannungsschwankungen besser aus geregelt.According to the teachings of the invention, on-board voltage fluctuations are better controlled from.
Der Ruhestrom der Schaltung kann nur durch den Ruhestrom des Reglers U1A gegeben sein. Im Fall V1 = 0 sperrt Q1. Daraus folgt I1 = 0, U- = U+ =0, Id = 0, 12 = 0 und Ib = 13.The quiescent current of the circuit can be given only by the quiescent current of the regulator U1A. In the case of V1 = 0, Q1 blocks. It follows that I1 = 0, U- = U + = 0, Id = 0, 12 = 0 and Ib = 13.
Selbst bei niederohmiger Dimensionierung belasten I1 und I2 die Batterie V2 im Ruhebetrieb nicht.Even with low-impedance sizing, I1 and I2 do not burden battery V2 in idle mode.
Claims (4)
- Electronic control device for regulating the voltage across a high-side load, in particular for controlling a fan in a motor vehicle, having a control voltage (V1) which is referred to system ground and which is mirrored on to the positive high-side supply voltage,- the control voltage (V1) being fed to the base of a first transistor (Q1) which is operated in a common-emitter connection and which has a first resistor (R1) in the emitter circuit and a second resistor (R2) in the collector circuit and, in series with the latter, the base-emitter diode of a second transistor (Q2);- the second transistor (Q2) being of the same conductivity type as the first transistor (Q1);- the first and second transistors (Q1, Q2) being matched-parameter, thermally coupled transistors of the same conduction type;- the base-emitter diode of the second transistor (Q2) compensating for effects of the base-emitter diode of the first transistor (Q1), by which means the voltage drop across the series circuit comprising the base-emitter path of the second transistor (Q2) and the second resistor (R2) is a defined image of the voltage drop across the series circuit comprising the base-emitter path of the first transistor (Q1) and the first resistor (R1);- the voltage drop across the series circuit comprising the base-emitter path of the second transistor (Q2) and the second resistor (R2) serving as a reference variable for the regulation.
- Control device according to one of the preceding claims, characterized in that the input voltages supplied to the controller (U1A) are referenced to the positive supply potential from which the load is fed.
- Control device according to one of the preceding claims, characterized in that, in the event of supply voltage fluctuations, the regulation of the load voltage is independent of resistance matching.
- Control device according to one of the preceding claims, characterized in that the arrangement has a quiescent current consumption which is independent of the dimensioning of the resistors (R1 to R4).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006008839A DE102006008839B4 (en) | 2006-02-25 | 2006-02-25 | Electronic device for regulating the voltage across a high-side load |
PCT/DE2007/000268 WO2007095898A1 (en) | 2006-02-25 | 2007-02-14 | Electronic device for regulating the voltage across a high-side load |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1989605A1 EP1989605A1 (en) | 2008-11-12 |
EP1989605B1 true EP1989605B1 (en) | 2010-06-30 |
Family
ID=38137427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07711183A Expired - Fee Related EP1989605B1 (en) | 2006-02-25 | 2007-02-14 | Electronic device for regulating the voltage across a high-side load |
Country Status (6)
Country | Link |
---|---|
US (1) | US8050544B2 (en) |
EP (1) | EP1989605B1 (en) |
JP (1) | JP5090376B2 (en) |
KR (1) | KR20080096676A (en) |
DE (1) | DE102006008839B4 (en) |
WO (1) | WO2007095898A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007054191A1 (en) | 2007-11-14 | 2009-05-28 | Sitronic Gesellschaft für elektrotechnische Ausrüstung mbH. & Co. KG | Electronic control device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2130847A1 (en) * | 1971-06-22 | 1972-12-28 | Grundig Emv | Arrangement to turn the pole |
US3851235A (en) * | 1973-12-26 | 1974-11-26 | Ford Motor Co | Bridge circuit for controlling a direct current motor |
US4079308A (en) * | 1977-01-31 | 1978-03-14 | Advanced Micro Devices, Inc. | Resistor ratio circuit construction |
DE2708021C3 (en) * | 1977-02-24 | 1984-04-19 | Eurosil GmbH, 8000 München | Circuit arrangement in integrated CMOS technology for regulating the supply voltage for a load |
JPS58107921A (en) | 1981-12-22 | 1983-06-27 | Matsushita Electric Ind Co Ltd | Current supply device |
DE3342031B4 (en) * | 1982-11-23 | 2005-01-13 | Papst Licensing Gmbh & Co. Kg | Circuit arrangement for speed control of an electric motor |
JPH01302409A (en) * | 1988-05-30 | 1989-12-06 | Nec Ic Microcomput Syst Ltd | Power source circuit |
EP0952663B1 (en) * | 1998-04-23 | 2007-11-21 | Matsushita Electric Works, Ltd. | Driving circuit for oscillatory actuator |
DE10111913C2 (en) * | 2001-03-13 | 2003-07-31 | Semikron Elektronik Gmbh | Switching voltage converter |
DE102007035369A1 (en) * | 2007-07-27 | 2009-02-05 | Sitronic Ges. für elektrotechnische Ausrüstung GmbH & Co. KG | Circuit arrangement for temperature-dependent load current control |
DE102007054191A1 (en) * | 2007-11-14 | 2009-05-28 | Sitronic Gesellschaft für elektrotechnische Ausrüstung mbH. & Co. KG | Electronic control device |
-
2006
- 2006-02-25 DE DE102006008839A patent/DE102006008839B4/en active Active
-
2007
- 2007-02-14 EP EP07711183A patent/EP1989605B1/en not_active Expired - Fee Related
- 2007-02-14 WO PCT/DE2007/000268 patent/WO2007095898A1/en active Application Filing
- 2007-02-14 JP JP2008555610A patent/JP5090376B2/en not_active Expired - Fee Related
- 2007-02-14 KR KR1020087020866A patent/KR20080096676A/en not_active Application Discontinuation
- 2007-02-14 US US12/224,320 patent/US8050544B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2009528007A (en) | 2009-07-30 |
US20090148140A1 (en) | 2009-06-11 |
JP5090376B2 (en) | 2012-12-05 |
DE102006008839B4 (en) | 2007-12-27 |
KR20080096676A (en) | 2008-10-31 |
EP1989605A1 (en) | 2008-11-12 |
DE102006008839A1 (en) | 2007-09-27 |
US8050544B2 (en) | 2011-11-01 |
WO2007095898A1 (en) | 2007-08-30 |
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