WO1985005508A1 - Circuit pour produire, transferer entre des circuits de tension differente et stabiliser un courant alternatif - Google Patents

Circuit pour produire, transferer entre des circuits de tension differente et stabiliser un courant alternatif Download PDF

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Publication number
WO1985005508A1
WO1985005508A1 PCT/HU1985/000029 HU8500029W WO8505508A1 WO 1985005508 A1 WO1985005508 A1 WO 1985005508A1 HU 8500029 W HU8500029 W HU 8500029W WO 8505508 A1 WO8505508 A1 WO 8505508A1
Authority
WO
WIPO (PCT)
Prior art keywords
input
circuit
output
chopper
inverter
Prior art date
Application number
PCT/HU1985/000029
Other languages
German (de)
English (en)
Inventor
György HUSZTI
Imre Hermann
Attila KÁRPÁTI
Imre Ipsits
Károly SZÁSZ
István FARKAS
Péter MAGYAR
István VARJASI
György ÁRELDT
Ferenc MUSTÓ
Zoltán GÁJÁSZ
Róbert TUSCHÁK
Original Assignee
Budapesti Müszaki Egyetem
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 Budapesti Müszaki Egyetem filed Critical Budapesti Müszaki Egyetem
Publication of WO1985005508A1 publication Critical patent/WO1985005508A1/fr

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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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal 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
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
    • H02M7/538—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a push-pull configuration
    • H02M7/53803—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a push-pull configuration with automatic control of output voltage or current
    • H02M7/53806—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type

Definitions

  • the invention relates to a circuit arrangement for generating, stabilizing and transmitting alternating current between circuits with different voltages, this circuit arrangement being provided with a chopper chopping a DC voltage, a current detector, a Pilter circuit, a self-oscillating semiconductor inverter and a control circuit.
  • the effective value of the current is set from a pre-stabilized voltage by changing the resistance.
  • Modern electronic circuits can measure the real effective Value of the real current and by feedback of which a practically perfect solution is formed in the unit performing the regulation.
  • the circuits belonging to the first group are characterized by a simple, rosy design, a low puncture frequency characteristic of 50 or 100 Hz - and a low cost level.
  • a disadvantage of these solutions is that they can be implemented with relatively large geometrical masses and weights, are also low in efficiency, the setting of the effective value of the alternating current is lengthy and requires laborious adjustment work, and does not always meet the requirements for accuracy .
  • the functional frequency can be increased in the kHz range, which leads to a reduction in dimensions and weight and the accuracy that can be achieved depends on the quality parameters - and therefore on the price - of the circuit units used.
  • the efficiency can be increased significantly by using the switching mode control.
  • a disadvantage of this solution is that the measurement of the effective value of the real current is in most cases carried out in a secondary circuit, the potential of which deviates significantly from the potential of the control unit, and the measured value is passed on to the place of processing by bridging a large voltage difference is. This increases the price and the complexity of the circuit significantly.
  • the invention relates to a circuit arrangement which meets these requirements.
  • the invention is based on the knowledge that the change in the ratio between the mean value of the input current and the effective value of the output current of a self-oscillating inverter circuit which generates a square-wave voltage and which feeds a consumer with an ohmic-inductive character by means of a suitable change in the self-oscillation frequency sequence under an arbitrarily small one , can be held according to certain value. This ensures the possibility of mapping a signal proportional to the effective value of the output current on the control loop potential.
  • the effective value of the output aroma is realized by comparing the mean value of the input current of the inverter with a set target value and by changing the DC input voltage of the inverter.
  • the DC input voltage is changed by means of the chopper operating synchronously with the inverter, the switching ratio of which is determined by a controller connection.
  • the regulator circuit generates a signal which depends on the deviation of the setpoint from the mean value of the input atom of the inverter.
  • a current detector and filter circuit were inserted between the chopper and the inverter.
  • the synchronous operation of the chopper and the inverter is advantageous because it can reduce the additional error resulting from the non-ideal square wave voltage shape. With asynchronous puncture, the amplitude symmetry of the square waves can namely output voltage of the inverter cannot be secured.
  • Fig. 1 shows an embodiment of the circuit arrangement according to the invention.
  • Fig. 2 shows a preferred embodiment of the circuit arrangement according to the invention.
  • an unstabilized DC voltage which changes between given limits, reaches an input of a chopper 2, the point frequency of which is determined by a signal connected to its synchronization input 4, while its switching ratio is determined by a signal connected to its control input 3.
  • a self-oscillating inverter 7 supplies the alternating current for a circuit whose potential deviates from the direct voltage 1, and via its synchronous signal output 8 the signal determining the puncturing frequency of the chopper 2, which is led to the synchronization input 4 of the chopper 2.
  • a current detector 5 and a filter circuit 6 are arranged between the chopper 2 and the inverter 7.
  • the current detector 5 generates at its output 13 a signal proportional to the output current of the chopper 2 for an input 10 of a regulator circuit 9, to the other input 11 of which a current reference signal 14 is connected.
  • An output 12 of the regulator circuit 9 is connected to the control input 3 of the chopper 2 and uses it to determine the switching ratio of the chopper 2.
  • the exemplary embodiment of the circuit arrangement according to the invention stabilizes the effective value of the alternating current generated by the inverter 7 such that, depending on the deviation of the output current of the chopper 2 measured by means of the current detector 5 from the current reference signal 14 by means of the regulator circuit 9, the output current of the chopper 2 is kept at a constant value.
  • the filter circuit 6 connected between the chopper 2 and the inverter 7 ensures that a smoothed DC voltage reaches the input of the inverter 7.
  • the input current of the filter circuit 6 represents a direct current, the size of which corresponds to the mean value of the input current of the inverter 7 and at the same time represents the output current of the inverter 7.
  • the circuit arrangement thus keeps the input current of the inverter 7 at a constant value.
  • the circuit arrangement according to the invention stabilizes the effective value of the alternating current transmitted between circuits with different voltages, with accuracy depending on the choice of the self-oscillation frequency.
  • the circuit arrangement according to the invention is also suitable for power regulation.
  • the inverter 7 consists of a timer circuit 17 fed with a stabilized voltage 20, a first transistor 15, a second transistor 16, a transformer 18 with a primary winding with a single-phase center tap, and a summing amplifier 19.
  • the timer circuit 17, the first transistor 15 and the second transistor 16 form a known one Multivibrator.
  • the primary center point output of the transformer 18 with a center tap is connected to the input voltage of the inverter 7, while the two primary winding ends are each led to the collectors of the transistors 15, 16.
  • the secondary winding outputs of transformer 18 form the AC output of the circuit.
  • the summing amplifier 19 sums the base voltages of the transistors 15, 16, and the output of the summing amplifier 19 forms the synchronous signal output 3 of the inverter 7.
  • the chopper 2 is provided with a chopper circuit 22 known per se and a comparator 21.
  • the supply of the timer circuit securing the self-oscillation frequency of the inverter 7 and the base current of the transistors with a separately stabilized voltage has the advantage that the base currents of the transistors are not secured by the input of the inverter and thus do not flow via the current detector. In the opposite case, this would lead to an additional error. As a result of the puncture principle of the astable multivibrator, the sum of the base voltages gives the
  • Transistors approximately a triangular oscillation, the repetition frequency of which is twice the self-oscillation frequency. This reaches the non-inverting input of the comparator 21 and thus simultaneously secures the voltage required for pulse width modulation of the chopper circuit 22.
  • the non-inverting input of the comparator 21 is connected to the output 12 of the regulator circuit 9, while the output of the comparator 21 is connected to a logic control input 23 of the chopper circuit 22.
  • the chopper 2 functions symmetrically in every half period of the output voltage of the inverter, thereby ensuring the amplitude symmetry of the output voltage of the inverter 7 and thus the elimination of the additional errors.
  • the circuit arrangement according to the invention is provided with the following advantageous properties:
  • the circuit arrangement according to the invention has a simple structure, good efficiency, can be realized with small dimensions and is inexpensive.

Abstract

Circuit pour produire, transférer entre des circuits de tension différente et stabiliser un courant alternatif, comportant un échantillonneur (2) doté d'une entrée de synchronisation (4) et d'une entrée de régulation (3), un détecteur de courant (5), un circuit de filtre (6), un inverseur (7) auto-hétérodyne produisant une tension carrée et doté d'une sortie de signal synchrone (8) et un circuit de réglage (9). La caractéristique de la présente invention est qu'une tension continue (1) se modifiant dans des limites déterminées est appliquée via l'échantillonneur (2), le détecteur de courant (5) et le circuit de filtre (6) à une entrée de l'inverseur auto-hétérodyne (7) dont la sortie de signal synchrone (8) est amenée à l'entrée de synchronisation (4) de l'échantillonneur (2). Une sortie (13) du détecteur de courant (5) fournissant un signal proportionnel à la moyenne de courant se raccorde à une entrée (10) du circuit de réglage (9), alors qu'un signal de référence (14) déterminant la valeur du courant est amené à l'autre entrée du circuit de réglage (9). La sortie du circuit de réglage (9) est reliée à l'entrée de régulation (3) de l'échantillonneur (2). La sortie de l'inverseur (7) forme simultanément la sortie de courant alternatif du circuit.
PCT/HU1985/000029 1984-05-10 1985-05-09 Circuit pour produire, transferer entre des circuits de tension differente et stabiliser un courant alternatif WO1985005508A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU1816/84 1984-05-10
HU181684A HU190567B (en) 1984-05-10 1984-05-10 Circuit arrangement for generating alternating current, for transferring thereof between circuits with different voltage and for stabilizing thereof

Publications (1)

Publication Number Publication Date
WO1985005508A1 true WO1985005508A1 (fr) 1985-12-05

Family

ID=10956333

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU1985/000029 WO1985005508A1 (fr) 1984-05-10 1985-05-09 Circuit pour produire, transferer entre des circuits de tension differente et stabiliser un courant alternatif

Country Status (5)

Country Link
EP (1) EP0181909A1 (fr)
JP (1) JPS61502161A (fr)
DD (1) DD233898A1 (fr)
HU (1) HU190567B (fr)
WO (1) WO1985005508A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4755696A (en) * 1987-06-25 1988-07-05 Delco Electronics Corporation CMOS binary threshold comparator
US4962323A (en) * 1989-07-12 1990-10-09 National Semiconductor Corporation High speed auto zero comparator

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1127611A (fr) * 1955-06-08 1956-12-20 Procédé pour peindre, laquer ou vernir les moelles de rotin et appareil pour la mise en oeuvre de ce procédé
DE1242276B (de) * 1960-06-29 1967-06-15 Western Electric Co Wandlerschaltung
US3402301A (en) * 1964-11-04 1968-09-17 Robert F. Gibb Load responsive inverter
DE1930643A1 (de) * 1969-06-18 1971-01-07 Siemens Ag Schaltungsanordnung zum Konstanthalten des Entladungsstromes von Gasentladungsroehren,insbesondere Gaslasern
US3775702A (en) * 1972-03-16 1973-11-27 North Electric Co Transistor inverter circuit for supplying constant current output
DE2621763A1 (de) * 1976-05-15 1977-11-24 Olympia Werke Ag Sperrwandler-netzgeraet
DE2805887A1 (de) * 1977-02-14 1979-01-18 Cii Honeywell Bull Zerhackungssteuersystem
GB2005878A (en) * 1977-09-23 1979-04-25 Den Tal Ez Mfg Co Regulating and stabilizing circuit for x-ray source g3u
US4258309A (en) * 1978-07-07 1981-03-24 Sony Corporation Switching type power supply circuit
DE2944334A1 (de) * 1979-11-02 1981-05-14 Siemens AG, 1000 Berlin und 8000 München Unterdrueckung einer kritischen rueckwirkungsfrequenz eines ueber einen gleichstromsteller gespeisten wechselrichters
DE3008312A1 (de) * 1980-03-04 1981-09-10 Siemens Ag Zweipunkt-stromregler
EP0065379A2 (fr) * 1981-05-08 1982-11-24 The Marconi Company Limited Source de courant commandable
DE3130410A1 (de) * 1981-07-31 1983-02-17 Siemens AG, 1000 Berlin und 8000 München Analog-/digital-fernmeldesystem
AT372228B (de) * 1981-07-27 1983-09-12 Karcagi Altalanos Tech Gleichstromzerhackerschaltungsanordnung mit einem thyristor, insbesondere zur speisung eines gleichstrommotors
US4439868A (en) * 1982-03-18 1984-03-27 Kabushiki Kaisha Morita Seisakusho Medical X-ray radiation power supply apparatus

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1127611A (fr) * 1955-06-08 1956-12-20 Procédé pour peindre, laquer ou vernir les moelles de rotin et appareil pour la mise en oeuvre de ce procédé
DE1242276B (de) * 1960-06-29 1967-06-15 Western Electric Co Wandlerschaltung
US3402301A (en) * 1964-11-04 1968-09-17 Robert F. Gibb Load responsive inverter
DE1930643A1 (de) * 1969-06-18 1971-01-07 Siemens Ag Schaltungsanordnung zum Konstanthalten des Entladungsstromes von Gasentladungsroehren,insbesondere Gaslasern
US3775702A (en) * 1972-03-16 1973-11-27 North Electric Co Transistor inverter circuit for supplying constant current output
DE2621763A1 (de) * 1976-05-15 1977-11-24 Olympia Werke Ag Sperrwandler-netzgeraet
DE2805887A1 (de) * 1977-02-14 1979-01-18 Cii Honeywell Bull Zerhackungssteuersystem
GB2005878A (en) * 1977-09-23 1979-04-25 Den Tal Ez Mfg Co Regulating and stabilizing circuit for x-ray source g3u
US4258309A (en) * 1978-07-07 1981-03-24 Sony Corporation Switching type power supply circuit
DE2944334A1 (de) * 1979-11-02 1981-05-14 Siemens AG, 1000 Berlin und 8000 München Unterdrueckung einer kritischen rueckwirkungsfrequenz eines ueber einen gleichstromsteller gespeisten wechselrichters
DE3008312A1 (de) * 1980-03-04 1981-09-10 Siemens Ag Zweipunkt-stromregler
EP0065379A2 (fr) * 1981-05-08 1982-11-24 The Marconi Company Limited Source de courant commandable
AT372228B (de) * 1981-07-27 1983-09-12 Karcagi Altalanos Tech Gleichstromzerhackerschaltungsanordnung mit einem thyristor, insbesondere zur speisung eines gleichstrommotors
DE3130410A1 (de) * 1981-07-31 1983-02-17 Siemens AG, 1000 Berlin und 8000 München Analog-/digital-fernmeldesystem
US4439868A (en) * 1982-03-18 1984-03-27 Kabushiki Kaisha Morita Seisakusho Medical X-ray radiation power supply apparatus

Also Published As

Publication number Publication date
EP0181909A1 (fr) 1986-05-28
HUT37307A (en) 1985-11-28
JPS61502161A (ja) 1986-09-25
DD233898A1 (de) 1986-03-12
HU190567B (en) 1986-09-29

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