DE19546936A1 - DC voltage converter - Google Patents

DC voltage converter

Info

Publication number
DE19546936A1
DE19546936A1 DE19546936A DE19546936A DE19546936A1 DE 19546936 A1 DE19546936 A1 DE 19546936A1 DE 19546936 A DE19546936 A DE 19546936A DE 19546936 A DE19546936 A DE 19546936A DE 19546936 A1 DE19546936 A1 DE 19546936A1
Authority
DE
Germany
Prior art keywords
converter
load
voltage
converter according
dependent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19546936A
Other languages
German (de)
Inventor
Horst Dipl Ing Mueck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19546936A priority Critical patent/DE19546936A1/en
Publication of DE19546936A1 publication Critical patent/DE19546936A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3372—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration of the parallel type
    • H02M3/3374—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration of the parallel type with preregulator, e.g. current injected push-pull
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A DC push-pull converter is driven by a series regulator to which a comparator is assigned to compare the regulator output signal with a reference value. To this reference value, a load dependent variable is added. The load dependent value is derived from a current sensor in the circuit of the main switch of the converter. The sensor is supplemented by a condenser. The load-dependent value is chosen so that a load-dependent counter-coupling can be obtained to compensate for the internal resistance of the converter, taking the series regulator into account. In the output circuit of the converter there are devices to give delayed connections to the loads.

Description

Die Erfindung betrifft einen Gleichspannungswandler welcher über einen Längsregler betreibbar ist.The invention relates to a DC converter can be operated via a series regulator.

Stand der TechnikState of the art

Aus der DE 41 20 147 C2 ist ein Gegentakt- Gleichspannungswandler bekannt, dem ein Vorregler in Form eines Schaltreglers vorgeschaltet ist. Als Schaltkriterium wird dort der Energieaufnahmestrom herangezogen.DE 41 20 147 C2 discloses a push-pull Known DC converter, which is a pre-regulator in the form is connected upstream of a switching regulator. As a switching criterion the energy intake current is used there.

Vorteile der ErfindungAdvantages of the invention

Der Gleichspannungswandler gemäß den Merkmalen des Patentanspruchs 1 ist geeignet durch eine insbesondere stromabhängige Gegenkopplung den Innenwiderstand des Gleichspannungswandlers zu kompensieren. Der Gleichspannungswandler nach der Erfindung stellt eine unterbrechungsfreie Stromversorgung zur Verfügung auch fuhr den Fall, daß die Normalversorgungsspannung zusammenbricht und die Versorgung über eine redundante Versorgungsquelle erfolgen muß. Ein Spannungseinbruch wie bei herkömmlichen Reglern findet nicht statt. Im Gegensatz zu einem Schaltregler als Vorregler ergeben sich keine Regelschwingungen oder Regelverzögerungen. The DC-DC converter according to the characteristics of the Claim 1 is suitable by a particular current dependent negative feedback the internal resistance of the To compensate for DC converter. Of the DC-DC converter according to the invention provides a Uninterruptible power supply was also available the case that the normal supply voltage breaks down and the supply via a redundant supply source must be done. A drop in voltage as with conventional ones There are no controls. In contrast to one There are no switching regulators as pre-regulators Control vibrations or control delays.  

Durch die Weiterbildungen gemäß den Unteransprüchen treten insbesondere beim Zuschalten von Verbrauchern keine Spannungseinbruche auf.Step through the further training according to the subclaims especially when connecting consumers Voltage dips on.

Zeichnungendrawings

In der Figur ist ein Stromlauf eines Ausführungsbeispiels der Erfindung dargestellt.In the figure is a circuit of an embodiment presented the invention.

Beschreibung eines AusführungsbeispielsDescription of an embodiment

Der in der Figur dargestellte Gleichspannungswandler ist als Gegentaktwandler mit den Gegentaktschaltern S1 und S2 ausgebildet. Prinzipiell kann anstelle eines Gegentaktwandlers ein Eintakt- oder sonstiger Mehrtaktwandler vorgesehen sein. Die Normalversorgungsspannungsquelle UB versorgt den Gegentaktwandler über den Längsregler VR. Der Längsregler VR besteht im gezeigten Ausführungsbeispiel aus einem Feldeffekttransistor FL, der zwischen der Normalversorgungsspannungsquelle UB und der Mittelanzapfung der Primärwicklungen W1 und W2 des Transformators T1 angeordnet ist. Zur Regelung ist eine Vergleichseinrichtung - hier in Form eines Transistors TS - vorgesehen, der das Längsregler-Ausgangssignal - Spannung UV - mit einer Referenzgröße - Spannung UR über der Zenerdiode ZD1 - vergleicht. Die Spannung UV wird über einen Spannungsteiler R1, R2 abgegriffen und zur Basis des Transistors TS geleitet. Der Emitter ist mit der Referenzspannung UR beaufschlagt und der Kollektor fuhrt zur Steuerelektrode des Feldeffekttransistors FL. Der Längsregler VR verfügt über eine redundante Versorgungsspannungsquelle UMB, deren Nennspannung höher liegt als die Nennspannung der Normalversorgungsquelle UB. Wenn die Spannung der Normalversorgungsquelle UB zusammenbricht, beispielsweise durch einen Kurzschluß oder eine Unterbrechung, übernimmt die redundante Versorgungsspannungsquelle UMB die Versorgung des Gleichspannungswandlers über den Transistor TR. Dieser Transistor TR wird in diesem Falle leitend, da das Fußpunktpotential der Zenerdiode ZD2 an seiner Basis absinkt. Die Diode D1 dient zur Entkopplung der beiden Versorgungsspannungsquellen. Zur Versorgung des Längsreglers ist eine Entkopplungsdiode D2, ein RCR-Glied und eine Zenerdiode ZD3 mit parallel geschaltetem Widerstand R3 vorgesehen.The DC-DC converter shown in the figure is as Push-pull converter with push-pull switches S1 and S2 educated. In principle, instead of one Push-pull converter a single-ended or other Multi-cycle converter may be provided. The Normal supply voltage source UB supplies the Push-pull converter via the series regulator VR. The linear regulator VR consists in the embodiment shown Field effect transistor FL, which between the Normal supply voltage source UB and the center tap the primary windings W1 and W2 of the transformer T1 is arranged. A comparison device is used for regulation - Here in the form of a transistor TS - provided that Series regulator output signal - voltage UV - with a Reference variable - voltage UR across the Zener diode ZD1 - compares. The voltage UV is via a voltage divider R1, R2 tapped and the base of the transistor TS headed. The emitter is at the reference voltage UR and the collector leads to the control electrode of the Field effect transistor FL. The linear regulator VR has a redundant supply voltage source UMB, whose Nominal voltage is higher than the nominal voltage of the Normal supply source UB. When the tension of the Normal supply source UB breaks down, for example due to a short circuit or an interruption  the redundant supply voltage source UMB the supply the DC-DC converter via the transistor TR. This In this case, transistor TR becomes conductive since that Base potential of the Zener diode ZD2 at its base sinks. The diode D1 is used to decouple the two Supply voltage sources. To supply the series regulator is a decoupling diode D2, an RCR element and a Zener diode ZD3 with resistor R3 connected in parallel intended.

Erfindungsgemäß wird zur Referenzgröße UR eine lastabhängige Größe UL addiert. Diese lastabhängige Größe wird vorzugsweise so gewählt, daß eine lastabhängige Gegenkopplung zur Kompensation des Innenwiderstandes des Gleichspannungswandlers unter Einbeziehung des Längsreglers VR erreichbar ist. Ab einem vorgegebenen Stromwert begrenzen die Gegentaktschalter S1 und S2. Zur Erfassung der lastabhängigen Größe ist ein Stromsensor SR in der Verbindungsleitung zwischen den Gegentaktschaltern S1 und S2 und der Versorgungsquelle UB vorgesehen. Die am Stromsensor SR abfallende Spannung wird vorzugsweise mittels eines Integrators CG integriert. Die am Integrationskondensator CG anliegende lastabhängige Größe UL liegt dann in Serie zur Referenzspannung UR.According to the invention, the reference variable UR becomes a load-dependent one UL size added. This load-dependent quantity will preferably chosen so that a load-dependent Negative feedback for compensation of the internal resistance of the DC converter including the series regulator VR is reachable. Limit from a given current value push-pull switches S1 and S2. To capture the load-dependent size is a current sensor SR in the Connection line between push-pull switches S1 and S2 and the supply source UB provided. The one on the current sensor SR dropping voltage is preferably by means of a Integrators CG integrated. The on the integration capacitor CG adjacent load-dependent size UL is then in series Reference voltage UR.

Je höher der Strom durch den Stromsensor SR ist, desto höher ist die Emitterspannung des Transistors TS und um so höher ist die Eingangsspannung für den Gegentaktgleichspannungswandler. Durch diese höhere Eingangsspannung für den Gleichspannungswandler werden Spannungseinbrüche in den Lastkreisen kompensiert.The higher the current through the current sensor SR, the higher is the emitter voltage of the transistor TS and the higher is the input voltage for the Push-pull DC-DC converter. By this higher Input voltage for the DC converter Voltage drops in the load circuits are compensated.

Im gezeigten Ausführungsbeispiel sind mehrere Lastkreise vorgesehen, die über die Sekundärwicklungen des Transformators T1 gespeist werden. Das Zuschalten der Lastspannung und damit der Verbraucher kann in einer Ausgestaltung der Erfindung verzögert erfolgen, um einen "Softstart" zu gewährleisten, das heißt, um Stromsprünge und Spannungseinbrüche zu vermeiden. Auf diese Weise kann beim Zuschalten weiterer Verbraucher an den anderen Lastkreisen kein Spannungseinbruch erfolgen.In the exemplary embodiment shown there are several load circuits provided that over the secondary windings of the Transformer T1 are fed. Switching on the Load voltage and thus the consumer can in one Embodiment of the invention can be delayed by one  To ensure "soft start", that is, to jumps in current and Avoid voltage dips. In this way, when Switching on additional consumers on the other load circuits no voltage drop.

Laständerungen und Stromsprünge wirken sich über die Verkopplung der Transformatorwicklungen unmittelbar in einer Spannungsänderung am Stromsensor SR aus.Load changes and jumps in current affect the Coupling the transformer windings directly in one Voltage change at the current sensor SR off.

Für das verzögerte Zuschalten der Lastspannungen sind in den Ausgangskreisen Längstransistoren in Form der Feldeffekttransistoren F1 bis F4 vorgesehen, deren Steueranschlüsse über RC-Glieder R1, C1 bis R4, C4 an eine Steuerspannung anschaltbar sind. Zu dieser Anschaltung an die Steuerspannung sind beispielsweise Relaiskontakte K1, K2 vorgesehen. Über zusätzliche Wechsler der Relais kann der Zustand des Wandlers telemetriert werden.For the delayed connection of the load voltages are in the Output circuits series transistors in the form of the Field effect transistors F1 to F4 are provided, the Control connections via RC elements R1, C1 to R4, C4 to one Control voltage can be switched on. For this connection the control voltage is, for example, relay contacts K1, K2 intended. The additional Condition of the converter can be telemetrized.

Claims (8)

1. Gleichspannungswandler, insbesondere Gegentaktwandler, welcher über einen Längsregler (VR) betreibbar ist, wobei dem Längsregler (VR) eine Vergleichseinrichtung (TS) zugeordnet ist zum Vergleich eines Längsregler- Ausgangssignals (UV) mit einer Referenzgröße (UR) und wobei zur Referenzgröße (DR) eine lastabhängige Größe (UL) addiert ist.1. DC voltage converter, in particular push-pull converter, which can be operated via a series regulator (VR), whereby the linear regulator (VR) a comparison device (TS) assigned to compare a series regulator Output signal (UV) with a reference variable (UR) and where a load-dependent variable (UL) is added to the reference variable (DR) is. 2. Gleichspannungswandler nach Anspruch 1 dadurch gekennzeichnet, daß die lastabhängige Größe (UL) über einen Stromsensor (SR) im Stromkreis des Gleichspannunswandler- Hauptschalters/der Gegentaktschalter (S1, S2) des Gegentaktwandlers abgeleitet ist.2. DC-DC converter according to claim 1 thereby characterized in that the load-dependent variable (UL) over a Current sensor (SR) in the circuit of the DC / DC converter Main switch / push-pull switch (S1, S2) of the Push-pull converter is derived. 3. Gleichspannungswandler nach Anspruch 2 dadurch gekennzeichnet, daß der Stromsensor (SR) mit einem Kondensator (CG) zu einem Integrator ergänzt ist.3. DC-DC converter according to claim 2 thereby characterized in that the current sensor (SR) with a Capacitor (CG) is added to an integrator. 4. Gleichspannungswandler nach einem der Ansprüche 1 bis 3 dadurch gekennzeichnet, daß die lastabhängige Größe so gewählt ist, daß eine laststromabhängige Gegenkopplung zur Kompensation des Innenwiderstandes des Gleichspannungswandlers unter Einbeziehung des Längsreglers (VR) erreichbar ist.4. DC-DC converter according to one of claims 1 to 3 characterized in that the load-dependent size so is chosen that a load current-dependent negative feedback to Compensation of the internal resistance of the DC converter including the series regulator (VR) can be reached. 5. Gleichspannungswandler nach einem der Ansprüche 1 bis 4 dadurch gekennzeichnet daß in dem/den Ausgangskreis/en des Gleichspannungswandlers Einrichtungen (F1 bis F4) vorgesehen sind, die ein verzögertes Zuschalten der angeschossener Verbraucher ermöglichen.5. DC-DC converter according to one of claims 1 to 4 characterized in that in the output group (s) of DC converter devices (F1 to F4) provided  are a delayed activation of the injected Enable consumers. 6. Gleichspannungswandler nach Anspruch 5 dadurch gekennzeichnet, daß die Einrichtungen aus Längstransistoren (F1 bis F4), insbesondere Feldeffekttransistoren bestehen, deren Steueranschlüsse über RC-Glieder (R1, C1; R2, C2; R3, C3; R4, C4) an eine Steuerspannung anschaltbar sind.6. DC-DC converter according to claim 5 thereby characterized in that the devices from series transistors (F1 to F4), in particular field effect transistors, whose control connections via RC elements (R1, C1; R2, C2; R3, C3; R4, C4) can be connected to a control voltage. 7. Gleichspannungswandler nach Anspruch 6 dadurch gekennzeichnet, daß zur Anschaltung Relaiskontakte (K1, K2) vorgesehen sind, die insbesondere über Telecommandsignale aktivierbar sind.7. DC-DC converter according to claim 6 thereby characterized in that relay contacts (K1, K2) are provided, in particular via telecommand signals can be activated. 8. Gleichspannungswandler nach einem der Ansprüche 1 bis 7 dadurch gekennzeichnet, daß der Längsregler (VR) über eine redundante Versorgungsspannungsquelle (UMB) verfügt, deren Nennspannung höher liegt als die Nennspannung der Normalversorgungsquelle (UB).8. DC-DC converter according to one of claims 1 to 7 characterized in that the series regulator (VR) via a redundant supply voltage source (UMB), whose Nominal voltage is higher than the nominal voltage of the Normal supply source (UB).
DE19546936A 1995-12-15 1995-12-15 DC voltage converter Withdrawn DE19546936A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19546936A DE19546936A1 (en) 1995-12-15 1995-12-15 DC voltage converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19546936A DE19546936A1 (en) 1995-12-15 1995-12-15 DC voltage converter

Publications (1)

Publication Number Publication Date
DE19546936A1 true DE19546936A1 (en) 1997-06-19

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DE19546936A Withdrawn DE19546936A1 (en) 1995-12-15 1995-12-15 DC voltage converter

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1333567A2 (en) * 2002-01-31 2003-08-06 Vlt Corporation Electrical power conversion
US6984965B2 (en) 2002-01-31 2006-01-10 Vlt, Inc. Factorized power architecture with point of load sine amplitude converters

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1333567A2 (en) * 2002-01-31 2003-08-06 Vlt Corporation Electrical power conversion
EP1333567A3 (en) * 2002-01-31 2004-11-03 Vlt Corporation Electrical power conversion
US6930893B2 (en) 2002-01-31 2005-08-16 Vlt, Inc. Factorized power architecture with point of load sine amplitude converters
US6984965B2 (en) 2002-01-31 2006-01-10 Vlt, Inc. Factorized power architecture with point of load sine amplitude converters
US7145786B2 (en) * 2002-01-31 2006-12-05 Vlt, Inc. Point of load sine amplitude converters and methods

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