EP0374400B1 - Arrangement for regulating the current through a load, and method - Google Patents
Arrangement for regulating the current through a load, and method Download PDFInfo
- Publication number
- EP0374400B1 EP0374400B1 EP89119039A EP89119039A EP0374400B1 EP 0374400 B1 EP0374400 B1 EP 0374400B1 EP 89119039 A EP89119039 A EP 89119039A EP 89119039 A EP89119039 A EP 89119039A EP 0374400 B1 EP0374400 B1 EP 0374400B1
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- European Patent Office
- Prior art keywords
- current
- voltage
- load
- control
- regulator
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- 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
- 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
- G05F1/59—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 including plural semiconductor devices as final control devices for a single load
Definitions
- the invention is based on an arrangement according to the preamble of claim 1 and an application therefor.
- German patent application DE-C-37 41 222 it was proposed to provide a current sensor (current transformer) for potential-free evaluation of the current in a load circuit, the power supply to the evaluation device being carried out from the quantity detected and rectified by the current sensor.
- a current sensor current transformer
- US-A-46 88 162 shows an arrangement for regulating the current through a consumer, in which the voltage emitted by an AC voltage source supplies a consumer with current via a rectifier and via a switching regulator regulated as a function of the source and consumer-side current.
- the source-side (alternating) current is detected with a current sensor and, after being converted accordingly, compared with the consumer current.
- the control deviation derived from this serves to control the actuator of the switching regulator with the aim of improving the power factor of the arrangement and the course of the source-side current, cf. in particular the summary and column 2, line 59 - column 3, line 43 with FIG. 1.
- DE-A-31 30 571 shows an arrangement in the form of a flow converter for regulating the current through a consumer R, in which a current sensor Dr releases a voltage which is proportional to the consumer current and which, after corresponding rectification, serves as supply voltage for the control and regulating part of the Flow converter serves, cf. in particular the claim and the figure.
- the object of the invention is to develop the arrangement based on the preamble of claim 1 so that rapid current control is possible, the control circuit itself being to be potential-free from the consumer circuit.
- an advantageous application is to be specified. This object is achieved with respect to the arrangement by the characterizing features of claim 1 and with respect to the application by the features of claim 4.
- Claims 2 and 3 show configurations of the arrangement.
- the arrangement according to the invention makes it possible to detect the current to be controlled in a potential-free manner, to provide the control circuit - at any potential - with the necessary supply voltage and a fast control behavior, in particular by using an emitter or source potential controller To achieve with the help of an integrated voltage regulator and a current measuring resistor as a current source.
- the invention is suitable for use in high-voltage power supplies, in particular for cathode current control for traveling wave tubes.
- the simple structure and the reliability of the arrangement make it suitable for use in satellites.
- the consumer RV shown in FIG. 1 is fed via the current control arrangement from a power supply source Q.
- the power supply source Q is designed here as an AC voltage source. It is given, for example, by the voltage on the secondary winding of the transformer of a push-pull converter.
- the voltage UE supplied by the AC voltage source Q is rectified via a diode bridge circuit D1-D4 and smoothed by means of the capacitor C1.
- the actuator RV is fed from the rectified and smoothed supply voltage via the actuator TS1, here designed as a MOS field-effect transistor.
- the consumer current IV is detected with a current sensor TR1 arranged in the return line for the consumer current IV between the AC voltage source Q and the rectifier D2.
- the current sensor TR1 consists of one Current transformer with electrical isolation, on the secondary winding w2 a variable proportional to the consumer current IV appears.
- the supply and control voltages required for regulation are obtained from the proportional variable and the control of the actuator TS1 is also carried out.
- the voltage appearing on the secondary winding w2 of the current transformer TR1 is rectified by means of the rectifier circuit designed as a diode bridge circuit D5-D8.
- the series circuit consisting of the resistors R3, R4, R2 and the diode D9 is located between the terminal of the rectifier circuit D5-D8 and the gate connection of the MOS field-effect transistor TS1.
- the diode D9 is polarized in such a way that the MOS field-effect transistor TS1 can be turned on when the plus potential is supplied by the rectifier circuit.
- Resistor R2 represents the gate resistance of the MOS field-effect transistor.
- Resistor R3, together with capacitor C6, forms a smoothing filter.
- the resistor R3, together with the Zener diode ZD2 and the capacitor C5, generates a constant gate potential, that is to say independent of the consumer current.
- the anode of the Zener diode ZD2 is connected to the connection point of an integrated voltage regulator IC1 and current measuring resistor R1.
- the source electrode of the MOS field-effect transistor is connected via a source negative feedback resistor R5 both to the consumer RV and also via the current source consisting of the series circuit of the integrated voltage regulator IC1 and the current measuring resistor R1 to the negative potential terminal of the rectifier circuit D5-D8.
- the rectified current detected with the current transformer TR1 flows via the current path formed by a Zener diode ZD1 - between the terminal of the rectifier circuit D5-D8 and which leads to plus potential Source negative feedback resistor R5 - and back to the current transformer TR1 via the series circuit consisting of voltage regulator IC1 and current measuring resistor R1.
- the voltage regulator IC1 regulates the voltage drop across the control transistor - MOS field effect transistor TS1 - until the current set by the current measuring resistor R1 is established, ie the consumer current IV becomes proportional to the current through the current measuring resistor R1.
- consumer current IV üUref / R1, in which ü denotes the ratio of the current transformer TR1 and Uref the reference voltage of the voltage regulator IC1.
- the drain-source path of the actuating transistor TS1 is bridged by one or more Zener diodes ZD3 (ZD4) in order to protect it from reverse voltages that are too high.
- the Zener diode ZD5 protects the integrated voltage regulator IC1 against overvoltages.
- the capacitors C2, C3, C4 and C7 make it possible to set the desired amount and phase curve of the controller.
- a bipolar transistor can also be used as an actuator. 2
- the actuator is designed as a transistor cascade, consisting of the two bipolar transistors TS1 and TS2, the collector-emitter paths of which are connected in series. The control works as in the embodiment of FIG.
- the Zener diodes ZD3 and ZD4 are de-energized.
- the consumer current IV then flows through the Zener diodes ZD6, ZD7 and the collector-emitter path of the transistor TS1.
- the control stroke is then between UCE and 2UCE. If the emitter potential of transistor TS1 is further reduced, transistor TS2 also becomes conductive and the Zener diodes ZD3 and ZD4 become currentless. In this case, the control stroke is between 0 and U CE .
- Fig. 3 shows an arrangement for the cathode current control of a traveling wave tube with serial voltage generation; i.e. the supply voltages for cathode Ka, anode An, collector Co and Helix Hx, which are obtained by rectification from the pulse voltages UE1, UE2 and UE3, are stacked on one another in series.
- the primary winding w1 of the current sensor TR1 now detects the total current IG flowing in the common current return line of the traveling wave tube.
Description
Die Erfindung geht aus von einer Anordnung gemäß dem Oberbegriff des Patentanspruches 1 sowie eine Anwendung hierzu.The invention is based on an arrangement according to the preamble of claim 1 and an application therefor.
In der deutschen Patentanmeldung DE-C-37 41 222 wurde vorgeschlagen, zur potentialfreien Auswertung des Stromes in einem Lastkreis einen Stromsensor (Stromwandler) vorzusehen, wobei die Stromversorgung der Auswerteeinrichtung aus der mit dem Stromsensor erfaßten und gleichgerichteten Größe erfolgte.In German patent application DE-C-37 41 222, it was proposed to provide a current sensor (current transformer) for potential-free evaluation of the current in a load circuit, the power supply to the evaluation device being carried out from the quantity detected and rectified by the current sensor.
Aus Tietze/Schenk "Halbleiter-Schaltungstechnik", 2. Auflage, 1971, Seiten 338 bis 340, ist es bekannt, zur Stromregelung ein Stellglied in Form eines Transistors im Verbraucherstromkreis einzusetzen. Zur Stromregelung/Strombegrenzung wird dort über einen Meßwiderstand der Kollektor- oder Emitterstrom gemessen und der Basisstrom entsprechend nachgesteuert.From Tietze / Schenk "Semiconductor Circuit Technology", 2nd edition, 1971, pages 338 to 340, it is known to use an actuator in the form of a transistor in the consumer circuit for current control. For current control / current limitation, the collector or emitter current is measured there via a measuring resistor and the base current is readjusted accordingly.
Die US-A-46 88 162 zeigt eine Anordnung zum Regeln des Stromes durch einen Verbraucher, bei der die von einer Wechselspannungsquelle abgegebene Spannung über einen Gleichrichter und über einen in Abhängigkeit vom quellen- und verbraucherseitigen Strom geregelten Schaltregler einen Verbraucher mit Strom versorgt. Der quellenseitige (Wechsel-) Strom wird mit einem Stromsensor erfaßt und nach entsprechender Umformung mit dem Verbraucherstrom verglichen. Die hieraus abgeleitete Regelabweichung dient zur Steuerung des Stellgliedes des Schaltreglers mit dem Ziel, den Leistungsfaktor der Anordnung und den Verlauf des quellenseitigen Stroms zu verbessern, vgl. insbesondere die Zusammenfassung und Spalte 2, Zeile 59 - Spalte 3, Zeile 43 mit Fig. 1.US-A-46 88 162 shows an arrangement for regulating the current through a consumer, in which the voltage emitted by an AC voltage source supplies a consumer with current via a rectifier and via a switching regulator regulated as a function of the source and consumer-side current. The source-side (alternating) current is detected with a current sensor and, after being converted accordingly, compared with the consumer current. The control deviation derived from this serves to control the actuator of the switching regulator with the aim of improving the power factor of the arrangement and the course of the source-side current, cf. in particular the summary and column 2, line 59 - column 3, line 43 with FIG. 1.
Die DE-A-31 30 571 zeigt eine Anordnung in Form eines Durchflußwandlers zum Regeln des Stromes durch einen Verbraucher R, bei der ein Stromsensor Dr potentialfrei eine zum Verbraucherstrom proportionale Spannung abgibt, die nach entsprechender Gleichrichtung als Versorgungsspannung für den Steuer- und Regelteil des Durchflußwandlers dient, vgl. insbesondere den Patentanspruch und die Figur.DE-A-31 30 571 shows an arrangement in the form of a flow converter for regulating the current through a consumer R, in which a current sensor Dr releases a voltage which is proportional to the consumer current and which, after corresponding rectification, serves as supply voltage for the control and regulating part of the Flow converter serves, cf. in particular the claim and the figure.
Aufgabe der Erfindung ist es, die Anordnung ausgehend vom Oberbegriff des Patentanspruchs 1 so auszubilden, daß eine schnelle Stromregelung möglich ist, wobei die Regelschaltung selbst potentialfrei vom Verbraucherstromkreis sein soll. Außerdem soll eine vorteilhafte Anwendung angegeben werden. Diese Aufgabe wird bezüglich der Anordnung durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst und bezüglich der Anwendung durch die Merkmale des Patentanspruchs 4. Die Ansprüche 2 und 3 zeigen Ausgestaltungen der Anordnung auf.The object of the invention is to develop the arrangement based on the preamble of claim 1 so that rapid current control is possible, the control circuit itself being to be potential-free from the consumer circuit. In addition, an advantageous application is to be specified. This object is achieved with respect to the arrangement by the characterizing features of claim 1 and with respect to the application by the features of claim 4. Claims 2 and 3 show configurations of the arrangement.
Die Anordnung gemäß der Erfindung ermöglicht es, den zu regelnden Strom potentialfrei zu erfassen, der Regelschaltung - auf beliebigem Potential - die nötige Versorgungsspannung zur Verfügung zu stellen und ein schnelles Regelverhalten, insbesondere durch den Einsatz einer Emitter- bzw. Source-Potential-Steuerung mit Hilfe eines integrierten Spannungsreglers und eines Strommeßwiderstandes als Stromquelle, zu erreichen. Die Erfindung eignet sich zum Einsatz in Hochspannungsstromversorgungen, insbesondere zur Kathodenstromregelung für Wanderfeldröhren. Durch den einfachen Aufbau und der Zuverlässigkeit der Anordnung ist sie zum Einsatz in Satelliten geeignet.The arrangement according to the invention makes it possible to detect the current to be controlled in a potential-free manner, to provide the control circuit - at any potential - with the necessary supply voltage and a fast control behavior, in particular by using an emitter or source potential controller To achieve with the help of an integrated voltage regulator and a current measuring resistor as a current source. The The invention is suitable for use in high-voltage power supplies, in particular for cathode current control for traveling wave tubes. The simple structure and the reliability of the arrangement make it suitable for use in satellites.
Anhand der Zeichnungen wird die Erfindung nun näher erläutert. Es zeigen
- Fig. 1
- eine Stromregelanordnung mit einem Feldeffekttransistor als Stellglied,
- Fig. 2
- eine Stromregelanordnung mit einer Transistorkaskade als Stellglied,
- Fig. 3
- eine Kathodenstromregelung für eine Wanderfeldröhre.
- Fig. 1
- a current control arrangement with a field effect transistor as an actuator,
- Fig. 2
- a current control arrangement with a transistor cascade as an actuator,
- Fig. 3
- a cathode current control for a traveling wave tube.
Der in Fig. 1 dargestellte Verbraucher RV wird über die Stromregelanordnung aus einer Stromversorgungsquelle Q gespeist. Die Stromversorgungsquelle Q ist hier als Wechselspannungsquelle ausgebildet. Sie ist beispielsweise gegeben durch die Spannung an der Sekundärwicklung des Transformators eines Gegentaktwandlers. Die von der Wechselspannungsquelle Q gelieferte Spannung UE wird über eine Diodenbrückenschaltung D1 - D4 gleichgerichtet und mittels des Kondensators C1 geglättet. Über das Stellglied TS1, hier als MOS-Feldeffekttransistor ausgebildet, wird der Verbraucher RV aus der gleichgerichteten und geglätteten Versorgungsspannung gespeist. Mit einem in der Rückleitung für den Verbraucherstrom IV zwischen der Wechselspannungsquelle Q und dem Gleichrichter D2 angeordneten Stromsensor TR1 wird der Verbraucherstrom IV erfaßt. Der Stromsensor TR1 besteht hier aus einem Stromwandler mit Potentialtrennung, an dessen Sekundärwicklung w2 eine zum Verbraucherstrom IV proportionale Größe erscheint. Aus der proportionalen Größe werden die zur Regelung erforderlichen Versorgungs- und Regelspannungen gewonnen und auch die Steuerung des Stellgliedes TS1 vorgenommen. Die an der Sekundärwicklung w2 des Stromwandlers TR1 erscheinende Spannung wird mittels der als Diodenbrückenschaltung D5 - D8 ausgebildeten Gleichrichterschaltung gleichgerichtet. Zwischen der Pluspotential führenden Klemme der Gleichrichterschaltung D5 - D8 und dem Gateanschluß des MOS-Feldeffekttransistors TS1 befindet sich die Serienschaltung, bestehend aus den Widerständen R3, R4, R2 und der Diode D9. Die Diode D9 ist derart gepolt, daß bei von der Gleichrichterschaltung geliefertem Pluspotential der MOS-Feldeffekttransistor TS1 leitend steuerbar ist. Der Widerstand R2 stellt den Gate-Widerstand des MOS-Feldeffekttransistors dar. Der Widerstand R3 bildet zusammen mit dem Kondensator C6 ein Glättungsfilter. Der Widerstand R3 erzeugt zusammen mit der Zenerdiode ZD2 und dem Kondensator C5 ein konstantes, d.h. vom Verbraucherstrom unabhängiges Gatepotential. Die Anode der Zenerdiode ZD2 ist am Verbindungspunkt eines integrierten Spannungsreglers IC1 und Strommeßwiderstand R1 angeschlossen. Die Sourceelektrode des MOS-Feldeffekttransistors ist über einen Sourcegegenkopplungswiderstand R5 sowohl mit dem Verbraucher RV als auch über die aus der Serienschaltung des integrierten Spannungsreglers IC1 und dem Strommeßwiderstand R1 bestehende Stromquelle mit der Minuspotential führenden Klemme der Gleichrichterschaltung D5 - D8 verbunden. Der mit dem Stromwandler TR1 erfaßte und gleichgerichtete Strom fließt über den aus einer Zenerdiode ZD1 gebildeten Strompfad - zwischen der Pluspotential führenden Klemme der Gleichrichterschaltung D5 - D8 und Sourcegegenkopplungswiderstand R5 - und über die Serienschaltung, bestehend aus Spannungsregler IC1 und Strommeßwiderstand R1, zum Stromwandler TR1 zurück. Der Spannungsregler IC1 regelt durch das Verstellen des Sourcepotentials den Spannungsabfall über dem Stelltransistor - MOS-Feldeffekttransistor TS1 - bis sich der durch den Strommeßwiderstand R1 vorgegebene Strom einstellt, d.h. der Verbraucherstrom IV proportional zum Strom durch den Strommeßwiderstand R1 wird. Für den Verbraucherstrom IV gilt dann:
wobei
ü das Ubersetzungsverhältnis des Stromwandlers TR1 und Uref die Referenzspannung des Spannungsreglers IC1 bezeichnet.The consumer RV shown in FIG. 1 is fed via the current control arrangement from a power supply source Q. The power supply source Q is designed here as an AC voltage source. It is given, for example, by the voltage on the secondary winding of the transformer of a push-pull converter. The voltage UE supplied by the AC voltage source Q is rectified via a diode bridge circuit D1-D4 and smoothed by means of the capacitor C1. The actuator RV is fed from the rectified and smoothed supply voltage via the actuator TS1, here designed as a MOS field-effect transistor. The consumer current IV is detected with a current sensor TR1 arranged in the return line for the consumer current IV between the AC voltage source Q and the rectifier D2. The current sensor TR1 consists of one Current transformer with electrical isolation, on the secondary winding w2 a variable proportional to the consumer current IV appears. The supply and control voltages required for regulation are obtained from the proportional variable and the control of the actuator TS1 is also carried out. The voltage appearing on the secondary winding w2 of the current transformer TR1 is rectified by means of the rectifier circuit designed as a diode bridge circuit D5-D8. The series circuit consisting of the resistors R3, R4, R2 and the diode D9 is located between the terminal of the rectifier circuit D5-D8 and the gate connection of the MOS field-effect transistor TS1. The diode D9 is polarized in such a way that the MOS field-effect transistor TS1 can be turned on when the plus potential is supplied by the rectifier circuit. Resistor R2 represents the gate resistance of the MOS field-effect transistor. Resistor R3, together with capacitor C6, forms a smoothing filter. The resistor R3, together with the Zener diode ZD2 and the capacitor C5, generates a constant gate potential, that is to say independent of the consumer current. The anode of the Zener diode ZD2 is connected to the connection point of an integrated voltage regulator IC1 and current measuring resistor R1. The source electrode of the MOS field-effect transistor is connected via a source negative feedback resistor R5 both to the consumer RV and also via the current source consisting of the series circuit of the integrated voltage regulator IC1 and the current measuring resistor R1 to the negative potential terminal of the rectifier circuit D5-D8. The rectified current detected with the current transformer TR1 flows via the current path formed by a Zener diode ZD1 - between the terminal of the rectifier circuit D5-D8 and which leads to plus potential Source negative feedback resistor R5 - and back to the current transformer TR1 via the series circuit consisting of voltage regulator IC1 and current measuring resistor R1. By adjusting the source potential, the voltage regulator IC1 regulates the voltage drop across the control transistor - MOS field effect transistor TS1 - until the current set by the current measuring resistor R1 is established, ie the consumer current IV becomes proportional to the current through the current measuring resistor R1. The following then applies to consumer current IV:
in which
ü denotes the ratio of the current transformer TR1 and Uref the reference voltage of the voltage regulator IC1.
Die Drain-Source-Strecke des Stelltransistors TS1 ist durch eine oder mehrere Zenerdioden ZD3 (ZD4) überbrückt, um sie vor zu hohen Sperrspannungen zu schützen. Die Zenerdiode ZD5 schützt den integrierten Spannungsregler IC1 vor Uberspannungen. Die Kondensatoren C2, C3, C4 und C7 erlauben es, den gewünschten Betrag und Phasenverlauf des Reglers einzustellen. Anstelle eines MOS-Feldeffekttransistors kann auch ein Bipolartransistor als Stellglied verwendet werden. Beim Ausführungsbeispiel nach Fig. 2 ist das Stellglied als Transistorkaskade, bestehend aus den beiden Bipolartransistoren TS1 und TS2, deren Kollektor-Emitterstrecken in Serie geschaltet sind, ausgebildet. Die Regelung arbeitet wie beim Ausführungsbeispiel nach Fig. 1 mit dem Unterschied, daß die Transistoren TS1 und TS2 versetzt durchsteuerbar sind, was einen größeren Regelhub zuläßt. Die Basispotentiale beider Transistoren TS1 und TS2 werden über die Zenerdiode ZD2 und die Widerstände R3 und R4 konstant gehalten. Wenn der Strom durch den Strommeßwiderstand R1 klein ist, fließt der Verbraucherstrom IV zuerst über die den Kollektor-Emitterstrecken der Transistoren TS1 und TS2 parallel geschalteten Zenerdioden ZD6, ZD7, ZD3 und ZD4. Der Regelhub beträgt dann 2 . UCE. (UCE = Kollektor-Emitterspannung eines Transistors). Wird das Emitterpotential der Kaskade (Emitter von TS1) erniedrigt, wird zuerst der Transistor TS1 leitend gesteuert. Die Zenerdioden ZD3 und ZD4 werden stromlos. Der Verbraucherstrom IV fließt dann über die Zenerdioden ZD6, ZD7 und die Kollektor-Emitterstrecke des Transistors TS1. Der Regelhub liegt dann zwischen UCE und 2UCE. Erniedrigt sich das Emitterpotential von Transistor TS1 noch weiter, wird zusätzlich der Transistor TS2 leitend und die Zenerdioden ZD3 und ZD4 werden stromlos. In diesem Falle liegt der Regelhub zwischen 0 und UCE.The drain-source path of the actuating transistor TS1 is bridged by one or more Zener diodes ZD3 (ZD4) in order to protect it from reverse voltages that are too high. The Zener diode ZD5 protects the integrated voltage regulator IC1 against overvoltages. The capacitors C2, C3, C4 and C7 make it possible to set the desired amount and phase curve of the controller. Instead of a MOS field effect transistor, a bipolar transistor can also be used as an actuator. 2, the actuator is designed as a transistor cascade, consisting of the two bipolar transistors TS1 and TS2, the collector-emitter paths of which are connected in series. The control works as in the embodiment of FIG. 1 with the difference that the transistors TS1 and TS2 can be controlled offset, which allows a larger control stroke. The basic potential both transistors TS1 and TS2 are kept constant via the Zener diode ZD2 and the resistors R3 and R4. If the current through the current measuring resistor R1 is small, the consumer current IV first flows through the Zener diodes ZD6, ZD7, ZD3 and ZD4 connected in parallel with the collector-emitter paths of the transistors TS1 and TS2. The control stroke is then 2. UCE. (UCE = collector-emitter voltage of a transistor). If the emitter potential of the cascade (emitter of TS1) is lowered, the transistor TS1 is first turned on. The Zener diodes ZD3 and ZD4 are de-energized. The consumer current IV then flows through the Zener diodes ZD6, ZD7 and the collector-emitter path of the transistor TS1. The control stroke is then between UCE and 2UCE. If the emitter potential of transistor TS1 is further reduced, transistor TS2 also becomes conductive and the Zener diodes ZD3 and ZD4 become currentless. In this case, the control stroke is between 0 and U CE .
Fig. 3 zeigt eine Anordnung zur Katodenstromregelung einer Wanderfeldröhre bei serieller Spannungserzeugung; d.h. die Versorgungsspannungen für Katode Ka, Anode An, Kollektor Co und Helix Hx, die durch Gleichrichtung aus den Impulsspannungen UE1, UE2 und UE3 gewonnen werden, sind seriell aufeinander aufgestockt. Die Primärwicklung w1 des Stromsensors TR1 erfaßt nun den in der gemeinsamen Stromrückleitung der Wanderfeldröhre fließenden Gesamtstrom IG.Fig. 3 shows an arrangement for the cathode current control of a traveling wave tube with serial voltage generation; i.e. the supply voltages for cathode Ka, anode An, collector Co and Helix Hx, which are obtained by rectification from the pulse voltages UE1, UE2 and UE3, are stacked on one another in series. The primary winding w1 of the current sensor TR1 now detects the total current IG flowing in the common current return line of the traveling wave tube.
Claims (4)
- A device for regulating the current flowing through a load and having the following characteristics:a) an AC voltage source (Q) supplies a load (RV) with direct current via a first rectifier (D1 to D4) and a regulator,b) the regulator is linear in series with the load (RV) by means of a control element (TS1),c) a current sensor (TR1), located between the AC voltage source (Q) and the first rectifier (D1 to D4) emits, free of potential, a value proportional to the current; and having the following characteristics:d) the value proportional to the current is rectified by a second rectifier (D5 to D8) and supplies in paralleld1) a first circuit comprised of the series connection of a first constant voltage element (ZD1), an auxiliary voltage regulator (IC1) and a current measuring resistor (R1),d2) a second circuit comprising the series connection of a resistor (R3), a second constant voltage element (ZD2) and the current measuring resistor (R1);e) the auxiliary voltage regulator (IC1) depends for its control on the voltage drop at the current measuring resistor (R1);f) the switch point between the first constant voltage element (ZD1) and the auxiliary voltage regulator (IC1) is connected with one of the terminals, conducting load current, of the control element (TS1);g) the switch point between the first resistor (R3) and the second constant voltage element (ZD2) is connected with the control terminal of the control element (TS1)
- A device in accordance with claim 1, characterized in that the control element is comprised of a bipolar or field effect transistor (TS1) bridging at least one Zener diode (ZD3).
- A device in accordance with claims 1 or 2, characterized in that the control element comprises a transistor cascade (TS1, TS2), the segments of which conducting the load current are each bridged by at least one Zener diode (ZD3, ZD4), the cascade being of such a size that each cascade element can be made alternately conductive to the next.
- Use of the device in accordance with one of claims 1 to 3 for regulating the cathode current of a travelling-wave tube during serial electrode voltage generation, the primary coil (w1) of the current sensor (TR1) in the form of a current converter being switched into the common current return of the travelling-wave tube between the supply source (Q) and the first rectifiers (D1 to D4) which are designed for high voltage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3843260 | 1988-12-22 | ||
| DE3843260A DE3843260C1 (en) | 1988-12-22 | 1988-12-22 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0374400A2 EP0374400A2 (en) | 1990-06-27 |
| EP0374400A3 EP0374400A3 (en) | 1991-11-21 |
| EP0374400B1 true EP0374400B1 (en) | 1994-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89119039A Expired - Lifetime EP0374400B1 (en) | 1988-12-22 | 1989-10-13 | Arrangement for regulating the current through a load, and method |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4994954A (en) |
| EP (1) | EP0374400B1 (en) |
| CA (1) | CA2006426C (en) |
| DE (2) | DE3843260C1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5284242A (en) * | 1992-06-22 | 1994-02-08 | Queens Group, Inc. | Folding paperboard package |
| DE4227890A1 (en) * | 1992-08-22 | 1994-03-03 | Ant Nachrichtentech | HV transformer with screened windings - uses multi-layer screening with conductive layer and outer insulating layers with similar expansion coefficient to transformer insulation mass |
| US5345376A (en) * | 1993-02-19 | 1994-09-06 | Tescom Corporation | Switching power supply with electronic isolation |
| DE9416084U1 (en) * | 1993-10-25 | 1995-02-23 | Papst Motoren Gmbh & Co Kg | Power supply |
| DE4425842A1 (en) * | 1994-07-21 | 1996-02-01 | Ant Nachrichtentech | Cathode current regulator for TWT |
| DE4425841A1 (en) | 1994-07-21 | 1996-02-01 | Ant Nachrichtentech | Cathode current regulator, in particular for a traveling wave tube amplifier |
| DE59708621D1 (en) * | 1996-12-17 | 2002-12-05 | Papst Motoren Gmbh & Co Kg | Switching Power Supply |
| DE19801711A1 (en) * | 1998-01-17 | 1999-07-22 | Aixcon Elektrotechnik Gmbh | Controlled power supply for magnetron |
| US6044001A (en) * | 1999-01-19 | 2000-03-28 | Hughes Electronics Corporation | Anode controller circuit for a traveling wave tube |
| SE514120C2 (en) * | 1999-03-09 | 2001-01-08 | Ericsson Telefon Ab L M | Device in power supply unit for grid-plated O-type microwave tube |
| US6392355B1 (en) | 2000-04-25 | 2002-05-21 | Mcnc | Closed-loop cold cathode current regulator |
| US6653789B2 (en) * | 2001-03-26 | 2003-11-25 | Truck-Lite Co., Inc. | Multiregulator circuit and lamp |
| EP2089961A1 (en) * | 2006-11-09 | 2009-08-19 | Osram Gesellschaft mit Beschränkter Haftung | Self-oscillating dc-dc converter and method therefor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726361B2 (en) * | 1974-04-25 | 1982-06-04 | ||
| US4302717A (en) * | 1980-02-04 | 1981-11-24 | Fairchild Camera And Instrument Corp. | Power supply with increased dynamic range |
| US4488162A (en) * | 1980-07-08 | 1984-12-11 | International Business Machines Corporation | Self-aligned metal field effect transistor integrated circuits using polycrystalline silicon gate electrodes |
| DE3130571C2 (en) * | 1981-08-01 | 1983-07-21 | Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | Power supply device |
| DE3236379C2 (en) * | 1982-10-01 | 1986-08-14 | Philips Kommunikations Industrie AG, 8500 Nürnberg | Circuit arrangement for generating an auxiliary voltage |
| DE3341345A1 (en) * | 1983-11-15 | 1985-05-23 | SGS-ATES Deutschland Halbleiter-Bauelemente GmbH, 8018 Grafing | VOLTAGE REGULATOR |
| JPS61224857A (en) * | 1985-03-29 | 1986-10-06 | Hitachi Ltd | Controller of rectifier circuit |
| DE3741222C1 (en) * | 1987-12-05 | 1988-12-15 | Ant Nachrichtentech | Switched-mode regulator having a current limiting device |
-
1988
- 1988-12-22 DE DE3843260A patent/DE3843260C1/de not_active Expired - Fee Related
-
1989
- 1989-10-13 EP EP89119039A patent/EP0374400B1/en not_active Expired - Lifetime
- 1989-10-13 DE DE58907983T patent/DE58907983D1/en not_active Expired - Fee Related
- 1989-12-20 US US07/454,014 patent/US4994954A/en not_active Expired - Fee Related
- 1989-12-21 CA CA002006426A patent/CA2006426C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2006426A1 (en) | 1990-06-22 |
| CA2006426C (en) | 2001-06-12 |
| EP0374400A3 (en) | 1991-11-21 |
| US4994954A (en) | 1991-02-19 |
| EP0374400A2 (en) | 1990-06-27 |
| DE3843260C1 (en) | 1990-05-03 |
| DE58907983D1 (en) | 1994-08-04 |
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