FR2503953A1 - Static inverter for DC=AC converter - has blocking transistor in supply line allowing conduction only during production of pulses in load - Google Patents
Static inverter for DC=AC converter - has blocking transistor in supply line allowing conduction only during production of pulses in load Download PDFInfo
- Publication number
- FR2503953A1 FR2503953A1 FR8107370A FR8107370A FR2503953A1 FR 2503953 A1 FR2503953 A1 FR 2503953A1 FR 8107370 A FR8107370 A FR 8107370A FR 8107370 A FR8107370 A FR 8107370A FR 2503953 A1 FR2503953 A1 FR 2503953A1
- Authority
- FR
- France
- Prior art keywords
- inverter
- thyristor
- switching
- transistor
- thyristors
- 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.)
- Pending
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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
- H02M7/505—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 thyratron or thyristor type requiring extinguishing means
- H02M7/515—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/5152—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only with separate extinguishing means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
Description
La présente invention concerne les onduleurs statiques alimentés par une source continue et dont la charge de sortie peut titre très diverse: faible ou grande, inductive ou non, réceptrice ou même génératrice... The present invention relates to static inverters supplied by a direct source and whose output load can vary widely: low or large, inductive or not, receiver or even generator ...
Les onduleurs transforment un courant ou une tension continue en un courant ou une tension alternative. The inverters transform a direct current or voltage into an alternating current or voltage.
Dans les onduleurs, les phases sont alimentées par des interrupteurs statiques reliés aux polarités et qui sont successivement fermés ou ouverts pour fournir la tension ou le courant idoine à la charge. Lors du changement d'état des interrupteurs statiques (commutation) et surtout dans les onduleurs à thyristors, il peut y avoir transitoirement court-circuit de polarités. In inverters, the phases are supplied by static switches connected to the polarities and which are successively closed or opened to supply the appropriate voltage or current to the load. When the state of the static switches (switching) changes, and especially in thyristor inverters, there may be a transient short circuit of polarities.
Pour remédier à cet état, deux techniques sont employées. L'une consiste à éviter que deux interrupteurs de polarité différente soient passants simultanément et oblige à manceuvrer séparément les interrupteurs de manière à ménager un temps mort après l'extinction d'un interrupteur et l'amor çage de l'autre. L'autre technique consiste à limiter le courant de court- circuit pendant la commutation au moyen d'une inductance. To remedy this condition, two techniques are used. One is to prevent two switches of different polarity from passing simultaneously and obliges to move the switches separately so as to provide a dead time after the extinction of one switch and the initiation of the other. The other technique is to limit the short-circuit current during switching by means of an inductor.
Le dispositif suivant l'invention permet d'empêcher le court-circuit des polarités pendant la commutation et présente une faible impédance en fonctionnement normal. De plus, il ngest pas fonction du temps de commutation et peut donc assurer le blocage du court-circuit aussi longtemps que l'on veut et, par exemple, être utilisé dans des techniques de modulation de largeur dtimpulsion. The device according to the invention makes it possible to prevent the short circuit of the polarities during switching and has a low impedance in normal operation. In addition, it is not a function of the switching time and can therefore ensure the blocking of the short circuit for as long as desired and, for example, be used in pulse width modulation techniques.
Le dispositif, objet de l'invention, comporte un (ou des) interrupteur statique en série avec une (ou les) polarité de la source. Cet interrupteur est normalement fermé et est ouvert juste avant la commutation dans ltonduleur pour être refermé après celle-ci. The device, object of the invention, comprises one (or more) static switch in series with one (or more) polarity of the source. This switch is normally closed and is opened just before switching in the inverter to be closed after this.
Selon une réalisation de l'invention, cet interrupteur est réalisé par un transistor, shunté en anti-parallèle par un dispositif redresseur. According to one embodiment of the invention, this switch is produced by a transistor, shunted in anti-parallel mode by a rectifier device.
Le schéma, figure 1, illustre à titre d'exemple non limitatif un mode de réalisation du dispositif conforme à la présente invention et appliqué à un mutateur monophasé à thyristors. The diagram, FIG. 1, illustrates by way of nonlimiting example an embodiment of the device according to the present invention and applied to a single-phase thyristor mutator.
Tel qu'il est représenté, le dispositif comporte un transistor 1, shunté par une diode en inverse 2, selon l'invention. Ce dispositif est placé entre la source 3 et le mutateur 4 constitué d'un transformateur à point milieu, de deux diodes de blocage 5 et 6, de deux thyristors 7 et 8, de deux diodes de retour 9 et 10 et d'un circuit inductancecondensateur 11 et 12 de commutation. As shown, the device comprises a transistor 1, shunted by a reverse diode 2, according to the invention. This device is placed between the source 3 and the mutator 4 consisting of a mid-point transformer, two blocking diodes 5 and 6, two thyristors 7 and 8, two return diodes 9 and 10 and a circuit switching inductor and capacitor 11 and 12.
Dans un fonctionnement en mutateur, le transistor 1 est conducteur en même temps que le thyristor 7 par exemple, assurant une onde positive sur la charge. Au moment de la commutation, on bloque le transistor 1 et on amorce le thyristor 8. Le condensateur 12 se décharge via le thyristor 8 la diode de retour 9, la diode de blocage 5 et l'inductance 11, bloquant le thyristor 7. Lorsque la commutation est terminée, le condensateur est chargé dans l'autre sens, le thyristor 7 est bloqué et le thyristor 8 conducteur. On rend alors conducteur le transistor 1 et l'onde négative est ap pliquée sur la charge. In mutator operation, the transistor 1 is conductive at the same time as the thyristor 7 for example, ensuring a positive wave on the load. At the time of switching, the transistor 1 is blocked and the thyristor 8 is started. The capacitor 12 discharges via the thyristor 8 the return diode 9, the blocking diode 5 and the inductor 11, blocking the thyristor 7. When the switching is completed, the capacitor is charged in the other direction, the thyristor 7 is blocked and the thyristor 8 conductive. The transistor 1 is then made conductive and the negative wave is applied to the load.
Dans un deuxième exemple, non limitatif, représenté par le schéma figure 2, on illustre la présente invention par un interrupteur statique à thyristor, appliqué à un onduleur triphasé à extinction totale fonctionnant en modulation de largeur d'impulsion. In a second, nonlimiting example, represented by the diagram in FIG. 2, the present invention is illustrated by a static thyristor switch, applied to a three-phase inverter with total extinction operating in pulse width modulation.
Tel qu'il est représenté, le dispositif comporte un interrupteur statique constitué par un thyristor 1, une diode en inverse 2, un thyristor d'extinction 3 du thyristor 1 par le circuit d'extinction inductance 11, condensateur 12. As shown, the device comprises a static switch constituted by a thyristor 1, a reverse diode 2, an extinction thyristor 3 of the thyristor 1 by the inductance extinction circuit 11, capacitor 12.
Ce dispositif est placé entre la source et l'onduleur triphasé 4 constitué de 6 thyristors et diodes en inverse, montés en pont. le système d'extinction de l'onduleur est réalisé par le même circuit inductance 11, condensateur 12 et le thyristor 5 d'extinction totale de l'onduleur 4. Lorsqu' on désire changer la séquence des thyristors conducteurs de l'onduleur, on bloque le thyristor 1 par l'amorçage de son thyristor d'extinction 3. On amorce ensuite le thyristor 5 qui assure l'extinction totale des thyristors du pont et on amorce en même temps les thyristors qui devront être conducteurs dans la séquence suivante, Lorsque la commutation est terminée, que le thyristor 5 est à nouveau bloqué et que les thyristors éteints ont retrouvé leur pouvoir bloquant, on amorce le thyristor 1.Pour assurer de la modulation de largeur d'impulsion, on peut faire fonctionner le thyristor 1 à la manière d'un hacheur, ce qui assure une modulation sur l'ensemble de l'onduleur et combiner les deux fonctions données au thyristor 1, à savoir celle de blocage pendant la commutation et celle de hacheur. Mais on peut obtenir une modulation indépendante des phases en agissant sur les séquences des thyristors conducteurs, par exemple en modulant chaque phase au cours d'une demi-période par l'amorçage et extinction successifs de ses thyristors. Chaque nouvelle séquence de thyristors conducteurs entratne une commutation suivant le processus décrit ci-dessus.This device is placed between the source and the three-phase inverter 4 consisting of 6 thyristors and diodes in reverse, mounted in a bridge. the extinction system of the inverter is produced by the same inductance circuit 11, capacitor 12 and the thyristor 5 of complete extinction of the inverter 4. When it is desired to change the sequence of the thyristors conducting the inverter, blocks thyristor 1 by priming its extinction thyristor 3. Thereafter, thyristor 5 which initiates the complete extinction of the thyristors of the bridge is primed and the thyristors which must be conductive in the following sequence are primed, When the switching is over, the thyristor 5 is blocked again and the extinct thyristors have regained their blocking power, the thyristor 1 is primed. To ensure pulse width modulation, thyristor 1 can be operated at the like a chopper, which provides modulation on the entire inverter and combine the two functions given to thyristor 1, namely that of blocking during switching and that of chopper. However, it is possible to obtain an independent modulation of the phases by acting on the sequences of the conductive thyristors, for example by modulating each phase during a half-period by successively starting and extinguishing its thyristors. Each new sequence of conductive thyristors causes switching according to the process described above.
Le dispositif, objet de l'invention, permet une réalistation plus aisée et moins coûteuse des onduleurs employés dans l'industrie ou pour des utilisations domestiques, en vue par exemple de créer des alimentations sans coupure ou des entraînements à vitesse variable de moteurs asynchrones. The device, object of the invention, allows easier and cheaper realization of inverters used in industry or for domestic uses, for example to create uninterruptible power supplies or variable speed drives of asynchronous motors.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8107370A FR2503953A1 (en) | 1981-04-13 | 1981-04-13 | Static inverter for DC=AC converter - has blocking transistor in supply line allowing conduction only during production of pulses in load |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8107370A FR2503953A1 (en) | 1981-04-13 | 1981-04-13 | Static inverter for DC=AC converter - has blocking transistor in supply line allowing conduction only during production of pulses in load |
Publications (1)
Publication Number | Publication Date |
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FR2503953A1 true FR2503953A1 (en) | 1982-10-15 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8107370A Pending FR2503953A1 (en) | 1981-04-13 | 1981-04-13 | Static inverter for DC=AC converter - has blocking transistor in supply line allowing conduction only during production of pulses in load |
Country Status (1)
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FR (1) | FR2503953A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0253432A1 (en) * | 1986-07-10 | 1988-01-20 | Hollandse Signaalapparaten B.V. | Energy converter |
CN115833547A (en) * | 2023-02-08 | 2023-03-21 | 西南交通大学 | Decoupling circuit suitable for wide-band pulse load and control method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2050787A1 (en) * | 1969-10-15 | 1971-04-22 | Tokyo Shibaura Electric Co | Inverter |
US4048554A (en) * | 1976-11-22 | 1977-09-13 | Allis-Chalmers Corporation | Variable frequency, variable voltage power supply |
DE2657718A1 (en) * | 1976-12-20 | 1978-06-22 | Siemens Ag | Thyristor operated static inverter - has LC commutating circuit in series with third thyristor avoiding need for short circuit protection inductance |
DE2900338A1 (en) * | 1978-01-23 | 1979-07-26 | Mitsubishi Electric Corp | INVERTER |
-
1981
- 1981-04-13 FR FR8107370A patent/FR2503953A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2050787A1 (en) * | 1969-10-15 | 1971-04-22 | Tokyo Shibaura Electric Co | Inverter |
US4048554A (en) * | 1976-11-22 | 1977-09-13 | Allis-Chalmers Corporation | Variable frequency, variable voltage power supply |
DE2657718A1 (en) * | 1976-12-20 | 1978-06-22 | Siemens Ag | Thyristor operated static inverter - has LC commutating circuit in series with third thyristor avoiding need for short circuit protection inductance |
DE2900338A1 (en) * | 1978-01-23 | 1979-07-26 | Mitsubishi Electric Corp | INVERTER |
Non-Patent Citations (3)
Title |
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EXBK/66 * |
EXBK/68 * |
EXBK/72 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0253432A1 (en) * | 1986-07-10 | 1988-01-20 | Hollandse Signaalapparaten B.V. | Energy converter |
CN115833547A (en) * | 2023-02-08 | 2023-03-21 | 西南交通大学 | Decoupling circuit suitable for wide-band pulse load and control method |
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