DE4428682C2 - Process for supplying an inductive load with sinusoidal alternating current and alternating current regulator therefor - Google Patents
Process for supplying an inductive load with sinusoidal alternating current and alternating current regulator thereforInfo
- Publication number
- DE4428682C2 DE4428682C2 DE4428682A DE4428682A DE4428682C2 DE 4428682 C2 DE4428682 C2 DE 4428682C2 DE 4428682 A DE4428682 A DE 4428682A DE 4428682 A DE4428682 A DE 4428682A DE 4428682 C2 DE4428682 C2 DE 4428682C2
- Authority
- DE
- Germany
- Prior art keywords
- load
- current
- alternating current
- inductive
- freewheeling
- 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.)
- Expired - Fee Related
Links
Classifications
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
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- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/04—Single phase motors, e.g. capacitor motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
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- 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
Description
Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Patentanspruches 1 und einem Wechselstromsteller nach dem Oberbegriff des Patentanspruches 2.The invention relates to a method according to the preamble of claim 1 and an AC power controller according to the preamble of claim 2.
Ein derartiges Verfahren und ein derartiger Wechselstromsteller sind aus der DE 35 39 647 A1 bekannt. Beim bekannten Verfahren und der bekannten Vorrichtung erfolgt die Versorgung einer induktiven Last mit Wechselstrom durch Laststromstellung im Pulsbe trieb mit einem eingestellten Tastverhältnis (Puls/Periode-Verhältnis), wobei der sinus förmige Laststrom bei einem Vielfachen der Grundfrequenz vorzugsweise eine Frequenz über 16 kHz mit Hilfe eines Laststromschalters beispielsweise Transistorstellers geschal tet wird. Zur Induktionsstromrückspeisung sind parallel zur Wechselstromlast in zwei Freilaufzweigen gegenphasig gesteuerte Freilaufschaltelemente vorgesehen. Dabei er folgt die Induktionsstromrückspeisung in Abhängigkeit von dem Spannungsnulldurch gängen der angelegten Wechselspannung. Wegen der Nacheilung des Stromes in der induktiven Last kann die induktive Energie nur in den gleichpoligen Bereichen, in denen Strom und Spannung jeweils positiv bzw. jeweils negativ sind, an die Wechselstromlast zurückgeführt werden. In den gegenpoligen UI-Bereichen treten jedoch störende Induk tionsspannungsimpulse auf, die unterdrückt werden. Dies erfolgt mit Hilfe einer Halte schaltung, welche den Laststromschalter während eines im Bereich des Nulldurchgan ges der Wechselspannung liegenden Haltebereichs ständig entweder in einer geöffneten oder geschlossenen Schaltstellung hält.Such a method and such an AC power controller are known from DE 35 39 647 A1 known. In the known method and the known device, the Supply of an inductive load with alternating current through load current setting in the pulse driven with a set duty cycle (pulse / period ratio), the sine shaped load current at a multiple of the fundamental frequency, preferably a frequency over 16 kHz with the help of a load current switch, for example a transistor actuator is tested. For induction current feedback, two are parallel to the AC load Freewheel branches provided in phase-controlled freewheeling switching elements. Doing it follows the induction current feedback depending on the voltage zero gears of the applied AC voltage. Because of the lag of the current in the inductive load, the inductive energy can only in the same-pole areas in which Current and voltage are positive and negative, respectively, to the AC load to be led back. However, annoying inductors occur in the UI areas with opposite poles tion voltage impulses that are suppressed. This is done with the help of a stop circuit, which the load current switch during a in the range of zero crossing of the alternating voltage, the holding area is either in an open position or closed switch position.
Aufgabe der Erfindung ist es, ein Verfahren und einen Wechselstromsteller der eingangs genannten Art zu schaffen, bei denen mit vereinfachten Hilfsmitteln eine gesteuerte Ver sorgung einer blindanteilbehafteten Wechselstromlast erreicht wird.The object of the invention is to provide a method and an alternating current controller to create mentioned type, in which a simplified ver with simplified aids supply of an alternating current load with reactive component is achieved.
Diese Aufgabe wird erfindungsgemäß beim Verfahren durch die kennzeichnenden Merkmale des Patentanspruches 1 und beim Wechselstromsteller durch die kennzeich nenden Merkmale des Patentanspruches 2 gelöst.This object is achieved in the method by the characterizing Features of claim 1 and in the AC controller by the character nenden features of claim 2 solved.
Hierbei wird für den Laststrom die Sinusform des aus dem Versorgungsnetz gezogenen Wechselstroms beibehalten. Zur Steuerung der von der Last abgegebenen Leistung wird das Tastverhältnis, mit dem der Laststrom ein- und ausgeschaltet wird, in bekannter Weise (DE 35 39 647 A1) entsprechend eingestellt. Zur Einstellung des Tastverhältnis ses genügt ein ungepolter Laststromschalter, welcher in der Lage ist, Wechselstrom in schneller Folge aus- und einzuschalten. Mit geeigneter Pulsweitenmodulation kann der Schalter in schneller Folge, z. B. mit 20 kHz, ein- und ausgeschaltet werden.Here, the sinusoidal shape of the drawn from the supply network is used for the load current Maintain alternating current. To control the power delivered by the load the duty cycle with which the load current is switched on and off, in known Way (DE 35 39 647 A1) set accordingly. For setting the duty cycle All that is needed is an unpoled load current switch, which is capable of alternating current in quick turn off and on. With suitable pulse width modulation, the Switches in quick succession, e.g. B. with 20 kHz, on and off.
Anhand der Figur wird an einem Ausführungsbeispiel die Erfindung noch näher erläutert.Based on the figure, the invention is explained in more detail using an exemplary embodiment.
Bei dem in der Figur dargestellten Ausführungsbeispiel dienen Klemmen K1 und K2 zur Versorgungsspannungszu führung. Mit einem Wechselstromverbraucher M, welcher ein Elektromotor sein kann, ist im Laststromkreis in Reihe geschaltet ein ungepoltes Schaltelement S3, welches in der Lage ist, Wechselstrom in schneller Folge aus- und einzuschalten. Ein schneller Schalt transistor ist hierfür geeignet.In the embodiment shown in the figure terminals K1 and K2 are used for supply voltage guide. With an AC consumer M, which an electric motor can be in the load circuit An unpolarized switching element S3 connected in series, which is capable of alternating current in faster Turn sequence off and on. A quick shift transistor is suitable for this.
Parallel zur Wechselstromlast M sind Freilaufkreise für die negative Halbwelle und für die positive Halbwelle des Laststromes geschaltet. Die Freilaufkreise ent halten jeweils eine Freilaufdiode D1 bzw. D2, die von Schaltelementen S1 und S2 parallel zur Wechselstrom last M in Abhängigkeit von der vorherrschenden Halb welle geschaltet werden. Dies geschieht stromsynchron.Freewheeling circuits are parallel to the AC load M. for the negative half wave and for the positive half wave of the load current switched. The freewheeling circles ent each hold a free-wheeling diode D1 and D2, respectively Switching elements S1 and S2 parallel to the alternating current last M depending on the prevailing half shaft can be switched. this happens current synchronous.
Beim dargestellten Ausführungsbeispiel erfolgt das Schalten der Schaltelemente S1 und S2 stromsynchron. Hierzu wird der Laststrom mit Hilfe eines Stromwand lers Tr, welcher als Transformator ausgebildet sein kann, erfaßt. Beim dargestellten Ausführungsbeispiel geschieht dies in der Primärwicklung des Transforma tors. Der erfaßte Strom wird auf die beiden Sekundär wicklungen abgebildet, die so geschaltet sind, daß die Schaltelemente S1 und S2 gegenphasig gesteuert werden. Diese gegenphasige Steuerung erfolgt im Takt des Laststromes, der die Frequenz der an den Klemmen K1 und K2 anliegenden Versorgungswechselspannung be sitzt. Aufgrund der Induktivität der Wechselstromlast M ist der Laststrom weitgehend von Anteilen der Hilfsfrequenz, mit der das Schaltelement 3 betrieben wird, z. B. 20 kHz befreit.In the exemplary embodiment shown, the switching elements S1 and S2 are switched in a current-synchronous manner. For this purpose, the load current is detected by means of a current transformer Tr, which can be designed as a transformer. In the illustrated embodiment, this happens in the primary winding of the transformer tor. The detected current is mapped to the two secondary windings, which are switched so that the switching elements S1 and S2 are controlled in phase opposition. This antiphase control takes place in time with the load current, which is the frequency of the AC supply voltage applied to terminals K1 and K2. Due to the inductance of the alternating current load M, the load current is largely dependent on the auxiliary frequency with which the switching element 3 is operated, for. B. 20 kHz exempt.
In der Figur ist ein einphasiger Wechselstromsteller mit einem Wechselstrommotor als Last dargestellt. Es kön nen auch mehrphasige Anordnungen (z. B. drei Phasen) zum Einsatz kommen. Die dargestellte Anordnung kann sowohl bei Wechsel- als auch Drehstromnetzen zum Ein satz kommen, wobei auch andere Lasten mit Blindantei len, insbesondere Induktivitäten, verlustarm und ein fach gesteuert werden können.In the figure is a single-phase AC power controller with an AC motor shown as a load. It can also multi-phase arrangements (e.g. three phases) are used. The arrangement shown can for both AC and three-phase networks set come, with other loads with Blindantei len, especially inductors, low loss and one can be controlled.
Die in der Figur dargestellte Vorrichtung arbeitet wie folgt:The device shown in the figure works as follows:
In der positiven Halbwelle ist die Klemme K1 positiv gegenüber der Klemme K2. Das Schaltelement S1, wel ches über den Stromwandler Tr halbwellenabhängig ge steuert wird, schaltet die Freilaufdiode D1 parallel zur Wechselstromlast M. Das Schaltelement S2 ist aus geschaltet, so daß die Freilaufdiode D2 im anderen Freilaufkreis (negative Halbwelle) inaktiv ist. Das Schaltelement S3 wird mittels geeigneter Pulsweiten modulation (PWM) in schneller Folge z. B. mit 20 kHz ein- und ausgeschaltet. In der Lastphase fließt der Strom über K1, M, Tr und das geschlossene Schaltele ment S3 zur Klemme K2. In der Freilaufphase (Pause des Tastverhältnisses), in welcher das Schaltelement S3 geöffnet ist, kann der Strom im Freilaufkreis für die positive Halbwelle von der Wechselstromlast M über den Stromwandler Tr, das Schaltelement S1 und die Freilaufdiode D1 weiterfließen.Terminal K1 is positive in the positive half-wave opposite the terminal K2. The switching element S1, wel ches via the current transformer Tr half-wave dependent is controlled, the freewheeling diode D1 switches in parallel to AC load M. Switching element S2 is off switched so that the freewheeling diode D2 in the other Freewheeling circuit (negative half wave) is inactive. The Switching element S3 is by means of suitable pulse widths modulation (PWM) in quick succession z. B. at 20 kHz on and off. The flows in the load phase Current via K1, M, Tr and the closed Schaltele S3 to terminal K2. In the free-running phase (pause of the duty cycle) in which the switching element S3 is open, the current in the freewheeling circuit for the positive half-wave from the AC load M via the current transformer Tr, the switching element S1 and the free-wheeling diode D1 continue to flow.
In der negativen Halbwelle ist die Klemme K1 negativ gegenüber der Klemme K2. Das Schaltelement S2 wird jetzt gesteuert vom Stromwandler Tr eingeschaltet, so daß die Freilaufdiode D2 aktiviert ist. Die Freilauf diode D1 ist inaktiv. Das Schaltelement S3 wird, wie schon erläutert, über die geeignete Pulsweitenmodula tion ein- und ausgeschaltet. In der Lastphase bei geschlossenem Schaltelement S3 fließt der Strom über die Klemme K2, das geschlossene Schaltelement S3, den Stromwandler Tr und die Wechselstromlast M zur Klemme K1. In der Freilaufphase (Pause des Tastverhältnis ses), in welcher das Schaltelement S3 geöffnet ist, kann der Strom im Freilaufkreis für die negative Halbwelle von der Wechselstromlast M über den Strom wandler Tr die Freilaufdiode D2 und das Schaltelement S2 weiterfließen.Terminal K1 is negative in the negative half-wave opposite the terminal K2. The switching element S2 is now controlled by the current transformer Tr switched on, see above that the freewheeling diode D2 is activated. The freewheel diode D1 is inactive. The switching element S3 is like already explained, about the suitable pulse width module tion on and off. In the load phase at closed switching element S3, the current overflows the terminal K2, the closed switching element S3, the Current transformer Tr and the AC load M to the terminal K1. In the freewheeling phase (pause of the duty cycle ses) in which the switching element S3 is open, can the current in the freewheeling circuit for the negative Half wave from the AC load M over the current converter Tr the freewheeling diode D2 and the switching element S2 continue to flow.
Während beider Halbwellen kann über das Tastverhält nis des Schaltelements S3 der effektive Wechselstrom der Last M eingestellt werden. Das Tastverhältnis bleibt fest eingestellt, solange die Leistung an der Last nicht verändert werden soll. Auf diese Weise wirkt das Schaltelement S3 zusammen mit den im Takt des Laststromes geschalteten Freilaufdioden D1 und D2 wie ein verlustarmer Wechselstromwiderstand. Der Strom in der Wechselstromlast M folgt dem Sinus der Versorgungsspannung an den Klemmen K1 und K2. Seine Amplitude bzw. seine Größe läßt sich über das Tast verhältnis einstellen.During both half-waves, the duty cycle nis the switching element S3 the effective alternating current the load M can be set. The duty cycle remains fixed as long as the performance at the Load should not be changed. In this way the switching element S3 works together with the clock of the load current switched freewheeling diodes D1 and D2 like a low loss AC resistor. Of the Current in the AC load M follows the sine of Supply voltage at terminals K1 and K2. His The amplitude or its size can be selected using the key adjust ratio.
Bei dem in der Figur dargestellten Ausführungsbei spiel benötigt man nur noch ein schnell schaltendes Schaltelement S3, welches als Schalttransistor ausge bildet sein kann für die Hilfsfrequenz. Das Schalt element S3 kann je nach erwünschtem Laststrom mit fest eingestelltem Tastverhältnis betrieben werden, da die Versorgungswechselspannung an den Klemmen K1 und K2 für einen sinusförmigen Verlauf des Laststro mes sorgt. Die Umleitung der Reverse-Ströme wird von den Schaltelementen S1 und S2, welche nur noch im Takt von 50 Hz umgeschaltet werden müssen, übernom men. Beim dargestellten Ausführungsbeispiel erfolgt die Umschaltung der Schaltelemente S1 und S2 strom synchron mit Hilfe eines Stromwandlers, dessen Pri märwindung den Laststrom führt und in der Zuleitung zur Last liegt. Die beiden Sekundärwicklungen des Stromwandlers sind gegenphasig und steuern mit ihrem Strom, der ein Abbild des Laststromes ist, die beiden Freilaufkreise durch die Schaltelemente S1 und S2.In the embodiment shown in the figure game you only need a fast switching Switching element S3, which is a switching transistor can be formed for the auxiliary frequency. The switching element S3 can be used depending on the desired load current fixed duty cycle are operated, since the AC supply voltage at terminals K1 and K2 for a sinusoidal course of the load current mes worries. The redirection of the reverse currents is from the switching elements S1 and S2, which are only in the Clock of 50 Hz must be switched over men. In the embodiment shown the switching of the switching elements S1 and S2 current synchronously with the help of a current transformer, the Pri märwindung carries the load current and in the supply line burdensome. The two secondary windings of the Current transformers are in phase opposition and control with their Current, which is an image of the load current, the two Freewheeling circuits through the switching elements S1 and S2.
Auf diese Weise erreicht man eine verlustarme Sinus strom-Leistungsregulierung bei blindanteilbehafteten Wechselstromlasten. Man hat einen steuerbaren, ver lustarmen Wechselstromwiderstand ohne Verzerrung des Last- oder Versorgungsstromes. Über den Stromwandler Tr gewinnt man eine automatische Steuerung der Frei laufkreise. Die Freilaufkreise schalten dabei netz synchron und benötigen keine Hilfsfrequenz. Für die Hilfsfrequenz ist nur noch ein schnelles Schaltele ment S3 erforderlich. Aufgrund der stützkondensatorfreien Schaltung ist keine Leistungsfaktorkorrektur erfor derlich.In this way you can achieve a low-loss sine power output regulation for those with blind components AC loads. You have a controllable, ver low - loss AC resistance without distortion of the Load or supply current. About the current transformer Tr you win an automatic control of the free running circles. The freewheeling circuits switch mains synchronous and do not require an auxiliary frequency. For the Auxiliary frequency is only a fast switching element ment S3 required. Because of the support capacitor free Circuit does not require power factor correction such.
Man erreicht einen guten Wirkungsgrad bei einfachem Aufbau. Ströme an der Last sind in der Amplitude ein stellbar und sinusförmig, da der Laststrom dem Sinus der Versorgungsspannung folgt. Aufgrund der gesteuer ten Freilaufdioden D1 und D2 können induktive Lasten verlustarm in Teillast, z. B. für einen Langsamlauf des Wechselstrommotors betrieben werden. Die Netz stromaufnahme erfolgt sinusförmig, so daß keine Lei stungsfaktorkorrektur erforderlich ist. Die Netz stromaufnahme der Last verhält sich, abgesehen von geringen 20 kHz-Resten, wie ein ohmscher Widerstand zur Leistungsregelung, ohne daß dessen Nachteile der hohen Verlustleistung in Kauf genommen werden müssen.Good efficiency is achieved with simple Construction. Currents at the load are in amplitude adjustable and sinusoidal, since the load current is the sine follows the supply voltage. Because of the tax Free-wheeling diodes D1 and D2 can carry inductive loads low loss in partial load, e.g. B. for slow speed of the AC motor are operated. The net Current consumption is sinusoidal, so that no lei Correction factor is required. The net current consumption of the load behaves apart from low 20 kHz residues, like an ohmic resistor for power control without the disadvantages of high power loss must be accepted.
Claims (3)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4428682A DE4428682C2 (en) | 1994-08-12 | 1994-08-12 | Process for supplying an inductive load with sinusoidal alternating current and alternating current regulator therefor |
| DE19532377A DE19532377A1 (en) | 1994-08-12 | 1995-09-01 | Supply of AC load especially AC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4428682A DE4428682C2 (en) | 1994-08-12 | 1994-08-12 | Process for supplying an inductive load with sinusoidal alternating current and alternating current regulator therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE4428682A1 DE4428682A1 (en) | 1996-02-15 |
| DE4428682C2 true DE4428682C2 (en) | 1997-01-23 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4428682A Expired - Fee Related DE4428682C2 (en) | 1994-08-12 | 1994-08-12 | Process for supplying an inductive load with sinusoidal alternating current and alternating current regulator therefor |
| DE19532377A Withdrawn DE19532377A1 (en) | 1994-08-12 | 1995-09-01 | Supply of AC load especially AC motor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19532377A Withdrawn DE19532377A1 (en) | 1994-08-12 | 1995-09-01 | Supply of AC load especially AC motor |
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| Country | Link |
|---|---|
| DE (2) | DE4428682C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19710161A1 (en) * | 1997-03-12 | 1998-09-24 | Ascom Frako Gmbh | Circuit for continuous variation of AC or DC current in load operated from AC or DC supply or combination supply e.g for heating systems |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19612117A1 (en) * | 1996-03-27 | 1997-10-02 | Telefunken Microelectron | AC voltage regulator circuit arrangement for AC motor control |
| DE19709264A1 (en) * | 1997-03-06 | 1998-09-10 | Hilti Ag | Method for reducing repercussions on the course of the current drawn from a network with inductive loads and device for driving motors according to this method |
| DE19741655A1 (en) * | 1997-03-12 | 1999-03-25 | Ascom Frako Gmbh | Circuit for continuously variable direct or indirect variation of the direct current and / or alternating current flowing through a consumer operated by a direct or alternating voltage or any combination thereof |
| US5838144A (en) * | 1997-05-07 | 1998-11-17 | York International Corporation | Solid state, reduced voltage motor starter enabling equalized input/output volt-amp ratings |
| US5923143A (en) * | 1998-03-20 | 1999-07-13 | York International Corporation | Solid state motor starter with energy recovery |
| DE19935048A1 (en) * | 1999-07-26 | 2001-02-08 | Mulfingen Elektrobau Ebm | System for operating an AC load, in particular an AC motor with speed setting |
| DE19939157B4 (en) * | 1999-08-20 | 2005-06-23 | Krohne Ag | A method for driving a vibrator and supply circuit for a vibrator |
| EP1496605A1 (en) | 2003-07-07 | 2005-01-12 | Vacon Oyj | Frequency converter and its control method |
| FI116647B (en) | 2004-06-17 | 2006-01-13 | Vacon Oyj | Control of the inverter pulse width modulator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3539647C2 (en) * | 1985-11-08 | 1994-05-26 | Asea Brown Boveri | Circuit arrangement for a pulse controlled AC power controller |
| CH679704A5 (en) * | 1989-10-04 | 1992-03-31 | Controlux Ag |
-
1994
- 1994-08-12 DE DE4428682A patent/DE4428682C2/en not_active Expired - Fee Related
-
1995
- 1995-09-01 DE DE19532377A patent/DE19532377A1/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19710161A1 (en) * | 1997-03-12 | 1998-09-24 | Ascom Frako Gmbh | Circuit for continuous variation of AC or DC current in load operated from AC or DC supply or combination supply e.g for heating systems |
| DE19710161C2 (en) * | 1997-03-12 | 2002-04-18 | Ascom Energy Systems Gmbh | Circuit for continuously variable direct or indirect variation of the direct current and / or alternating current flowing through a consumer operated by a mains direct or alternating voltage or any combination thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4428682A1 (en) | 1996-02-15 |
| DE19532377A1 (en) | 1997-03-06 |
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