DE2950340A1 - DC voltage converter for communications equipment - has compensating amplifier of given transfer function between integrator and comparator - Google Patents

DC voltage converter for communications equipment - has compensating amplifier of given transfer function between integrator and comparator

Info

Publication number
DE2950340A1
DE2950340A1 DE19792950340 DE2950340A DE2950340A1 DE 2950340 A1 DE2950340 A1 DE 2950340A1 DE 19792950340 DE19792950340 DE 19792950340 DE 2950340 A DE2950340 A DE 2950340A DE 2950340 A1 DE2950340 A1 DE 2950340A1
Authority
DE
Germany
Prior art keywords
integrator
comparator
transfer function
voltage converter
communications equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19792950340
Other languages
German (de)
Other versions
DE2950340C2 (en
Inventor
Ing.(grad.) Siegfried 7151 Erbstetten Lechler
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.)
Bosch Telecom GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19792950340 priority Critical patent/DE2950340C2/en
Publication of DE2950340A1 publication Critical patent/DE2950340A1/en
Application granted granted Critical
Publication of DE2950340C2 publication Critical patent/DE2950340C2/en
Expired 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
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Amplifiers (AREA)

Abstract

The converter comprises a controlled switch at the input of a power circuit and an integrator forming a control loop. A comparator is connected to the integrator's output and controls the switch. A compensating amplifier is located between the integrator and the comparator and has a high positive phase in the frequency range critical for control purposes. The compensating amplifier has a feedback path containing a double-T network designed to a specified transfer function. The converter is fast and stable, thereby smoothing out input disturbances.

Description

Gleichspannungswandler zur stabilisierten Stromversorgung nachrichtentechnisoher Geräte Zur Stromversorgung von Nachrichtengeräten mit stabilisierten Spannungen werden impulsbreitengeregelte Durchfluß- und Sperrwandler verwendet. Die Ansteuerung der Schalttransistoren erfolgt mit Impulsen konstanter Frequenz und variabler Breite. Die Impulsbreite wird von einem Impufsbreitenregler durch Vergleich der Ausgangsspannung mit einem Sollwert so geregelt, daß die Ausgangsspannung konstant i.st. Da die geschlossene Regelschleife in der Siebkette phasendrehende Tiefpässe enthält, treten in der Praxis Schwierigkeiten bezüglich der Stabi.lität der Regelschleife auf, und die Optimierung solcher Schaltungen in Hinsicht auf die Stabilität erfordert erheblichen experimentellen Aufwand.DC / DC converter for stabilized power supply from communications technology Devices For the power supply of communication devices with stabilized voltages Pulse-width controlled forward and flyback converters are used. The control of the switching transistors takes place with pulses of constant frequency and variable width. The pulse width is determined by a pulse width controller by comparing the output voltage controlled with a setpoint so that the output voltage is constant i.st. Since the closed Control loop in the sieve chain contains phase-shifting low-pass filters occur in practice Difficulties regarding the stability of the control loop and the optimization Such circuits in terms of stability require considerable experimental Expenditure.

Ein Gleichspannungswandler mit' der Grundschaltung nach Fig. 1 weist einen typischen Frequenzgang der Phase und des Betrages der Schleifenverstärkung nach Fig. 2 auf. Für eine sta- bile Regelung ist es wünschenswert, daß di.e Phase über einen möglichst großen Frequenzbereich einen hohen positiven Wert annimmt. Aus Fig. 2 ist der kritische Regelbereich daran zu erkennen, daß die Phase nur noch sehr geringfügig voreilt.A DC / DC converter with 'the basic circuit according to FIG. 1 has a typical frequency response of the phase and the magnitude of the loop gain according to FIG. 2. For a sta- bile regulation, it is desirable that the phase has a high positive over the largest possible frequency range Assumes value. From Fig. 2, the critical control range can be seen that the Phase only very slightly advanced.

Aus der Zeitschrift Frequenz 31 (1977) 4, S. 96 bis 100 und 31 (1977) 5, S. 153 bis 156 ist ein Aufsatz "Stabilitätsuntersuchungen an impulsbreitengeregelten Durchfluß- und Sperrwandlern" von Erich Pivit bekannt. Die darin beschriebenen Gleichspannungswandler weisen ebenfalls im Frequenzbereich 200 bis 600 Hz eine sehr geringe positive Phase auf.From the journal Frequency 31 (1977) 4, pp. 96 to 100 and 31 (1977) 5, pp. 153 to 156 is an essay "Stability Investigations on Pulse Width Regulated Forward and flyback converters "known by Erich Pivit. The DC voltage converters described therein also have a very low positive phase in the frequency range 200 to 600 Hz on.

Diese Gleichspannungswandler haben alle den Nachteil, daß für viele Anwendungsfälle eine zu geringe Regelgeschwindigkeit erreicht wird, da die Stabilität für höhere Frequenzen wegen zu geringer Phasenvoreilung nicht gewährleistet ist.These DC-DC converters all have the disadvantage that for many Applications too low a control speed is achieved because of the stability is not guaranteed for higher frequencies due to insufficient phase lead.

Der Erfindung liegt die Aufgabe zugrunde, einen Gleichspan nungswandler der eingangs genannten Art anzugeben, der mit höherer Regelgeschwindigkeit arbeitet und eine größere Stabilitätsreserve aufweist, so daß Eingangsspannungsstörungen besser ausgeregelt werden können als es bisher bekannt war.The invention is based on the object of a DC voltage converter of the type mentioned at the beginning, which works at a higher control speed and has a greater stability margin, so that input voltage disturbances can be regulated better than was previously known.

Die Aufgabe wird gelöst, wie im Anspruch 1 beschrieben.The object is achieved as described in claim 1.

Der Unteranspruch gibt eine vorteilhafte Ausgestaltung eines erfindungsgemäßen Gleichspannungswandlers an.The sub-claim gives an advantageous embodiment of an inventive DC / DC converter.

Im folgenden wird die Erfindung anhand der Figuren näher erläutert.The invention is explained in more detail below with reference to the figures.

Fig. 3 zeigt ein fllockschaltbild ei.ner erfindungsgemäßen An ordnung, Fig. 4 zei.gt eine Ausführungsform eines Kompensationsverstärkers, Fig. 5 zeigt den typischen Frequenzgang von Betrag und Phase der Verstärkung des Kompensationsverstärkers nach Fig. 4, Fig. 6 zeigt den Betrag und Phase der Schleifenverstärkung eines erfindungsgemäßen Gleichspannungswandlers.Fig. 3 shows a block diagram of an arrangement according to the invention, Fig. 4 shows an embodiment of a compensation amplifier, Fig. 5 shows the typical frequency response of the magnitude and phase of the gain of the compensation amplifier according to Fig. 4, Fig. 6 shows the amount and phase of the loop gain of an inventive DC-DC converter.

Durch das Ein- und Ausschalten der Induktivität im Leistungskreis entstehen Spannungsspitzen, die für di.e Ausgangsspannung sehr störend sind. Deshalb wird in den Ausgang ein Tiefpaß geschaltet, der die hohen Frequenzen kurzschließt, die .in den Spannungsspitzen enthalten sind. Dadurch wird die Ausgangsspannung weitgehend geglättet. Da sich dem Ausgangssignal diese Restwelligkeit überlagert, ist es für die Ableitung der Regelgröße erforderlich, daß die abgegri.ffene Ausgangsspannung mi.t Hilfe eines Integrators nochmals geglättet wird, bevor sie dem Komparator zugeführt wird. Denn schon geringe Störspannungsspitzen beeinflussen den Komparator so stark, daß eine exakte Regelung der Impulsbreite für die Schaltimpulse des gesteuerten Schalters nicht mehr möglich ist.By switching the inductance in the power circuit on and off voltage peaks arise which are very disturbing for the output voltage. That's why a low-pass filter is switched into the output, which short-circuits the high frequencies, contained in the voltage peaks. This will largely reduce the output voltage smoothed. Since this ripple is superimposed on the output signal, it is for the derivation of the controlled variable required that the tapped output voltage is smoothed again with the help of an integrator before it is fed to the comparator will. Because even small interference voltage peaks influence the comparator so strongly that that an exact regulation of the pulse width for the switching pulses of the controlled Switch is no longer possible.

Diese geschilderten Maßnahmen haben aber den Nachteil, daß sie den Frequenzgang der Phase der Schleifenverstärkung in Bezug auf die Stabilität des gesamten Regelkreises negativ beeinflussen; vergleiche dazu Fig. 2.However, these measures have the disadvantage that they the Frequency response of the phase of the loop gain in relation to the stability of the negatively affect the entire control loop; compare FIG. 2.

Der wesentliche Gedanke der Erfindung ist es, durch Einschalten eines Kompensationsverstärkers zwischen den Integrator und den Komparator den Frequenzgang der Phase der Schleifenverstärkung so zu korrigieren, daß eine ausrei.chende Stabilitätsreserve gewonnen wird und dami.t die Regelgeschwin- digkeit wesentlich erhöht werden kann.The main idea of the invention is, by switching on a Compensation amplifier between the integrator and the comparator the frequency response to correct the phase of the loop reinforcement so that a sufficient stability reserve is obtained and thus the control speed significantly increased can be.

Den dazu notwendigen Frequenzgang der Phase der Schleifenverstärkung erhält man z.B. mit Hilfe eines rückgekoppelten Kompensationsverstärkers gemäß Anspruch 2, wenn man die beiden Eckfrequenzen #1 und T2 entsprechend nahe zusammenlegt.The necessary frequency response of the phase of the loop gain is obtained, for example, with the aid of a feedback compensation amplifier according to claim 2, if you put the two corner frequencies # 1 and T2 close together accordingly.

Claims (2)

Patentansprüche 1.)Gleichspannungswandler zur stabilisierten Stromversorgung gung nachrichtentechnischer Geräte, bestehend aus einem Leistungskreis, einem diesem vorgeschalteten gesteuerten Schalter, sowie eine Regelschleife bildender Integrator mit nachgeschaltetem, den Schalter steuernden Komparator, dadurch gekennzeichnet, daß zwischen dem Integrator und dem Komparator ein im regelkritischen Frequenzbereich eine hohe positive Phase aufweisender Kompensationsverstärker eingeschaltet ist.Claims 1.) DC voltage converter for stabilized power supply generation of communications equipment, consisting of a power circuit, one of these upstream controlled switch, as well as an integrator forming a control loop with a downstream comparator controlling the switch, characterized in that that between the integrator and the comparator one in the rule-critical frequency range Compensation amplifier having a high positive phase is switched on. 2. Gleichspannungswandler nach Anspruch 1, dadurch gekennzeichnet, daß der Kompensationsverstänker über ein Doppel-T-Glied rückgekoppelt ist, so daß sich folgende Laplacetransformierte Übertragungsfunktion ergibt: daß die beiden Eckfrequenzen T1 und #2 so nahe beieinander liegen, daß sich der gewünschte Frequenzgang der Phase ergibt, dabei bedeutet: T = Übertragungsfunktion k = statische Verstärkung s -T = reziproke Eckfrequenz 1 T = reziproke Eckfrequenz 2 2 1 = Därnpfungsgrad 2 = Dämpfungsgrad 22. DC voltage converter according to claim 1, characterized in that the compensation amplifier is fed back via a double-T element, so that the following Laplace-transformed transfer function results: that the two corner frequencies T1 and # 2 are so close to each other that the desired frequency response of the phase results, which means: T = transfer function k = static gain s -T = reciprocal corner frequency 1 T = reciprocal corner frequency 2 2 1 = attenuation level 2 = Degree of damping 2
DE19792950340 1979-12-14 1979-12-14 DC voltage converter for the stabilized power supply of telecommunications equipment Expired DE2950340C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792950340 DE2950340C2 (en) 1979-12-14 1979-12-14 DC voltage converter for the stabilized power supply of telecommunications equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792950340 DE2950340C2 (en) 1979-12-14 1979-12-14 DC voltage converter for the stabilized power supply of telecommunications equipment

Publications (2)

Publication Number Publication Date
DE2950340A1 true DE2950340A1 (en) 1981-06-19
DE2950340C2 DE2950340C2 (en) 1986-02-27

Family

ID=6088481

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792950340 Expired DE2950340C2 (en) 1979-12-14 1979-12-14 DC voltage converter for the stabilized power supply of telecommunications equipment

Country Status (1)

Country Link
DE (1) DE2950340C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328840A1 (en) * 1983-08-10 1985-02-28 ANT Nachrichtentechnik GmbH, 7150 Backnang Method and circuit arrangement for the regulated driving of a switching transistor of a switched-mode regulator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3619256C2 (en) * 1986-06-07 1994-06-16 Ant Nachrichtentech Switching regulator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772588A (en) * 1971-10-01 1973-11-13 Cogar Corp Dual control loop switching regulator
US4095165A (en) * 1976-10-18 1978-06-13 Bell Telephone Laboratories, Incorporated Switching regulator control utilizing digital comparison techniques to pulse width modulate conduction through a switching device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772588A (en) * 1971-10-01 1973-11-13 Cogar Corp Dual control loop switching regulator
US4095165A (en) * 1976-10-18 1978-06-13 Bell Telephone Laboratories, Incorporated Switching regulator control utilizing digital comparison techniques to pulse width modulate conduction through a switching device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DE-B.: "Einführung in die elektronische Re- gelungstechnik", 4.Aufl., 1976, S.174-176 *
DE-Z.: "Frequenz", 1977, S.96-100 u. S.153-156 *
DE-Z.: "VALVO-Berichte", 1974, H.1/2, S.143-154 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328840A1 (en) * 1983-08-10 1985-02-28 ANT Nachrichtentechnik GmbH, 7150 Backnang Method and circuit arrangement for the regulated driving of a switching transistor of a switched-mode regulator

Also Published As

Publication number Publication date
DE2950340C2 (en) 1986-02-27

Similar Documents

Publication Publication Date Title
DE19814681B4 (en) Current Mode Switching Regulators
DE69400323T2 (en) Multi-loop control device and method for power switching converters with bandpass current control
DE2858066C2 (en) Arrangement for controlling the speed of an asynchronous motor
CH642203A5 (en) CIRCUIT ARRANGEMENT FOR CONTROLLING THE SPEED OF AN ASYNCHRONOUS MOTOR SUPPLIED BY A INTERMEDIATE CONVERTER.
DE3122988A1 (en) BLIND POWER GENERATOR
WO1987005411A1 (en) Adaptive regulating system with high precision and low positioning-energy consumption
DE3637144A1 (en) SPEED CONTROL DEVICE FOR AC MOTOR
EP0369118B1 (en) Method for operating a boost regulator, and arrangement
DE2510837B2 (en) Device for regulating control systems with dead time
DE4129539A1 (en) METHOD AND DEVICE FOR REGULATING THE SPEED OF AN ELECTRIC MOTOR
EP0353399A2 (en) Digitally adjustable frequency-dividing arrangement, especially for frequency synthesizers
DE3519116A1 (en) DC / DC CONVERTER
DE2920166C2 (en)
DE2625036A1 (en) Regulated mains power pack with phase:shift correction - has multi-loop control system with proportional differential action
DE2728563A1 (en) ROYAL DIAGNOSTIC GENERATOR WITH AN INVERTER FEEDING ITS HIGH VOLTAGE TRANSFORMER
DE1905369B2 (en) DC voltage converter circuit - utilising two switches with variable and fixed mark to space ratio respectively
DE2950340C2 (en) DC voltage converter for the stabilized power supply of telecommunications equipment
DE3516590C2 (en)
DE69820262T2 (en) METHOD AND DEVICE FOR CONTROLLING THE SWITCHES IN A CONTROL SYSTEM WITH A VARIABLE STRUCTURE AND CONTROLLABLE FREQUENCY
DE4205491A1 (en) METHOD FOR CONTROLLING A DIGITAL PULSE STAGE MODULATOR PSM
DE2908942C3 (en) Device for generating an electrical triangular voltage
DE3130356C2 (en) Control arrangement for the even load distribution of two power supply devices connected in parallel on the output side
DE2007694C3 (en) Voltage regulator with switching actuator
DE2657712C2 (en) Control circuit for a controllable converter
WO1989006002A1 (en) Controller

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: G05F 1/56

8127 New person/name/address of the applicant

Owner name: AEG-TELEFUNKEN NACHRICHTENTECHNIK GMBH, 7150 BACKN

8127 New person/name/address of the applicant

Owner name: ANT NACHRICHTENTECHNIK GMBH, 7150 BACKNANG, DE

8120 Willingness to grant licences paragraph 23
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee