DE102017006328A1 - Circuit arrangement of a generator for generating a square-wave voltage with pulse intervals - Google Patents
Circuit arrangement of a generator for generating a square-wave voltage with pulse intervals Download PDFInfo
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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
- 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
- H02M7/5387—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 bridge configuration
- H02M7/53871—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 bridge configuration with automatic control of output voltage or current
-
- 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
- H02M1/38—Means for preventing simultaneous conduction of switches
-
- 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
-
- 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
- H02M7/5381—Parallel type
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
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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
Abstract
Bei dieser Schaltungsanordnung wird eine Rechteckspannung Ua mit Impulspausen aus einer Gleichspannung Ug erzeugt. Während die Rechteckimpulse am Ausgang erzeugt werden, wird an den angeschlossenen Verbraucher am Ausgang Energie abgegeben. Mit den Impulspausen kann die Leistung geregelt werden, indem keine Energie abgegeben wird. Die Schaltungsanordnung besteht aus einer Gleichspannung Ug, einem Kondensator C1 und acht MOSFETs T1 bis T8. Dabei sind jeweils zwei MOSFETs T1 und T2, T3 und T4, T5 und T6, T7 und T8 parallel geschaltet. Die Schaltungsanordnung besteht aus 2 Halbbrücken. Die erste Halbbrücke besteht aus den MOSFETs T1, T2, T3 und T4 und die zweite Halbbrücke besteht aus den MOSFETs T5, T6, T7 und T8. Die Rechteckspannung Ua besteht abwechselnd aus steigenden und fallenden Flanken, die durch Einschalten und Ausschalten der MOSFETs T1 bis T8 erzeugt werden. Dabei werden die parallel verbundenen MOSFETs abwechselnd geschaltet, indem bei der folgenden Flanke der jeweils andere MOSFET ein- oder ausgeschaltet wird. Dies hat den großen Vorteil, dass jeder der acht MOSFETs mit der Hälfte der Frequenz der Rechteckspannung Ua geschaltet wird. Dadurch halbieren sich die Schaltverluste an den acht MOSFETs, wodurch höhere Frequenzen der Rechteckspannung Ua bis zu einigen Megahertz realisiert werden können. Bei diesen hohen Frequenzen werden dann MOSFETs aus Siliciumcarbid verwendet. Durch die Anzahl und die Länge der Impulspausen wird die Leistung geregelt, indem während einer Impulspause keine Leistung an den am Ausgang angeschlossenen Verbraucher abgegeben wird. Bei dem Übergang zu einer Impulspause werden die MOSFETs so geschaltet, dass während der Impulspause der Stromfluss am Ausgang in beiden Richtungen möglich ist. Bei dem Schaltzustand der MOSFETs für eine Impulspause sind entweder die MOSFETs T1 oder T2 eingeschaltet und T5 oder T6 eingeschaltet oder die MOSFETs T3 oder T4 eingeschaltet und T7 oder T8 eingeschaltet.In this circuit arrangement, a square-wave voltage Ua is generated with pulse intervals from a DC voltage Ug. While the square-wave pulses are generated at the output, energy is delivered to the connected load at the output. With the pulse pauses, the power can be regulated by no energy is released. The circuit consists of a DC voltage Ug, a capacitor C1 and eight MOSFETs T1 to T8. In each case two MOSFETs T1 and T2, T3 and T4, T5 and T6, T7 and T8 are connected in parallel. The circuit consists of 2 half bridges. The first half bridge consists of the MOSFETs T1, T2, T3 and T4 and the second half bridge consists of the MOSFETs T5, T6, T7 and T8. The square-wave voltage Ua alternately consists of rising and falling edges generated by turning on and off the MOSFETs T1 to T8. In this case, the MOSFETs connected in parallel are switched alternately by switching the other MOSFET on or off at the following edge. This has the great advantage that each of the eight MOSFETs is switched at half the frequency of the square-wave voltage Ua. As a result, the switching losses at the eight MOSFETs are halved, as a result of which higher frequencies of the square-wave voltage Ua up to a few megahertz can be realized. At these high frequencies, silicon carbide MOSFETs are then used. The number and length of the pulse pauses regulate the power by delivering no power to the load connected to the output during a pulse break. In the transition to a pulse break, the MOSFETs are switched so that during the pulse break the current flow at the output in both directions is possible. In the switching state of the MOSFETs for a pulse break, either the MOSFETs T1 or T2 are turned on and T5 or T6 are turned on or the MOSFETs T3 or T4 are turned on and T7 or T8 are turned on.
Description
Bei dieser Schaltungsanordnung wird eine Rechteckspannung mit Impulspausen aus einer Gleichspannung erzeugt. Während die Rechteckimpulse am Ausgang erzeugt werden, wird an den angeschlossenen Verbraucher am Ausgang Energie abgegeben. Mit den Impulspausen kann die Leistung geregelt werden, indem keine Energie abgegeben wird. Der eingestellte Schaltzustand der MOSFETs während der Impulspause ermöglicht einen Stromfluss am Ausgang in beiden Richtungen. Dadurch kann am Ausgang auch ein Verbraucher mit Spulen und Kondensatoren angeschlossen werden. Die Schaltungsanordnung mit jeweils zwei parallelen MOSFETs, die abwechselnd geschaltet werden, ermöglicht höhere Frequenzen der Rechteckspannung bis zu einigen Megahertz. Die höhere Frequenz wird dadurch möglich, dass die Schaltverluste der MOSFETs durch die Parallelschaltung halbiert werden.
Auch die MOSFET Treiber, welche die acht MOSFETs ansteuern, müssen nur für die Hälfte der Frequenz der Rechteckspannung am Ausgang dimensioniert werden.In this circuit arrangement, a square-wave voltage is generated with pulse intervals from a DC voltage. While the square-wave pulses are generated at the output, energy is delivered to the connected load at the output. With the pulse pauses, the power can be regulated by no energy is released. The set switching state of the MOSFETs during the pulse break enables a current flow at the output in both directions. As a result, a consumer with coils and capacitors can be connected to the output. The circuit arrangement, each with two parallel MOSFETs, which are switched alternately, allows higher frequencies of the square wave voltage up to a few megahertz. The higher frequency is possible because the switching losses of the MOSFETs are halved by the parallel connection.
Even the MOSFET drivers, which drive the eight MOSFETs, only have to be dimensioned for half the frequency of the square-wave voltage at the output.
Der Erfindung liegt die Aufgabe zugrunde, eine Rechteckspannung mit MOSFETs aus einer Gleichspannung Ug zu erzeugen, wobei die Frequenz der Rechteckspannung mehrere Megahertz beträgt. Die MOSFETs in dieser Schaltungsanordnung sind aus Silicium oder Siliciumcarbid. Dabei sollen die Schaltverluste in den MOSFETs reduziert werden, da die Schaltverluste bei einer Frequenz von mehreren Megahertz sehr hoch werden. Die Leistung am Ausgang soll mit Impulspausen reduziert werden können. Dabei soll während einer Impulspause die MOSFETs so geschaltet werden, dass ein Stromfluss am Ausgang in beiden Richtungen möglich ist.The invention has for its object to generate a square wave voltage with MOSFETs from a DC voltage Ug, wherein the frequency of the square wave voltage is several megahertz. The MOSFETs in this circuit are made of silicon or silicon carbide. The switching losses in the MOSFETs are to be reduced because the switching losses at a frequency of several megahertz are very high. The power at the output should be reduced with pulse intervals. During a pulse break the MOSFETs should be switched so that a current flow at the output in both directions is possible.
Die Erfindung wird nachstehend an Hand von in der Zeichnung dargestellten Schaltungsbildern näher erläutert.
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1 zeigt die Schaltungsanordnung für die Erzeugung einer Rechteckspannung mit acht MOSFETs und einem Kondensator. -
2 zeigt in einem Diagramm die Rechteckspannung Ua mit einer Impulspause und die entsprechenden Schaltzustände an den acht MOSFETs.
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1 shows the circuit for the generation of a square wave voltage with eight MOSFETs and a capacitor. -
2 shows in a diagram the square-wave voltage Ua with a pulse break and the corresponding switching states at the eight MOSFETs.
Die Schaltungsanordnung nach
In
Am Anfang der Rechteckimpulse zum Zeitpunkt t = 0 sind alle acht MOSFETs ausgeschaltet. Zum Zeitpunkt t = t1 beginnt die Rechteckspannung Ua mit dem Einschalten der MOSFETs
Die Rechteckspannung Ua besteht abwechselnd aus steigenden und fallenden Flanken. Eine steigende Flanke wird erzeugt, indem der eingeschaltete MOSFET der beiden MOSFETs
Die Rechteckspannung Ua am Ausgang ist unterbrochen von mehreren Impulspausen.
In
Durch die Anzahl und die Länge der Impulspausen wird die Leistung geregelt, indem während einer Impulspause keine Leistung an den am Ausgang angeschlossenen Verbraucher abgegeben wird. Bei dem Übergang zu einer Impulspause werden die MOSFETs so geschaltet, dass während der Impulspause der Stromfluss am Ausgang in beiden Richtungen möglich ist. Eine Impulspause kann durch zwei verschiedene Schaltzustände der MOSFETs eins bis acht erzeugt werden. Bei dem ersten Schaltzustand sind während einer Impulspause die mit dem Minus Pol der Gleichspannung Ug verbundenen MOSFETs
Durch Ausschalten des eingeschalteten MOSFET
Durch Ausschalten des eingeschalteten MOSFET
In
The number and length of the pulse pauses regulate the power by delivering no power to the load connected to the output during a pulse break. In the transition to a pulse break, the MOSFETs are switched so that during the pulse break the current flow at the output in both directions is possible. A pulse break can be generated by two different switching states of the MOSFETs one to eight. In the first switching state, the MOSFETs connected to the negative pole of the DC voltage Ug are during a pulse break
By switching off the switched MOSFET
By switching off the switched MOSFET
Die Zeit Differenz zwischen dem Ausschalten und Einschalten der MOSFETs ist nur sehr kurz aber notwendig, um einen Querstrom zwischen dem Plus Pol und dem Minus Pol der Gleichspannung Ug zu vermeiden.The time difference between turning off and turning on the MOSFETs is only very short but necessary to avoid a cross current between the plus pole and the minus pole of the DC voltage Ug.
Der Kondensator
Der Übergang von einer Impulspause zu einem Rechteckimpuls wird dadurch erzeugt, indem einer der beiden eingeschalteten MOSFETs ausgeschaltet wird und der zu dem ausgeschalteten MOSFET seriell verbundene MOSFET eingeschaltet wird.The transition from a pulse break to a square pulse is thereby generated by turning off one of the two switched MOSFETs and turning on the MOSFET serially connected to the turned off MOSFET.
Im Anspruch 2 sind zu jedem der MOSFETs
Im Anspruch 3 werden als Leistungsschalter MOSFETs aus Siliciumcarbid verwendet. Diese Siliciumcarbid MOSFETs sind aufgrund der technischen Eigenschaften für Schaltfrequenzen bis zu einigen Megahertz geeignet.In claim 3, MOSFETs made of silicon carbide are used as power switches. Due to their technical properties, these silicon carbide MOSFETs are suitable for switching frequencies up to several megahertz.
Im Anspruch 4 wird beschrieben, dass die Treiber Baugruppen für alle MOSFETs potentialfrei von der Steuerung der Schaltungsanordnung sind.In claim 4 it is described that the driver assemblies for all MOSFETs are floating from the control of the circuitry.
Der Anspruch 5 beschreibt die Schaltzustände bei der ersten Flanke der Rechteckspannung Ua. Am Anfang der Rechteckspannung Ua sind alle MOSFETs ausgeschaltet und bei der ersten Flanke wird der MOSFET
Der Anspruch 6 beschreibt die Schaltzustände am Ende der Rechteckspannung Ua. Am Ende der Rechteckspannung Ua wird eine Impulspause erzeugt und nach der Impulspause werden alle MOSFETs ausgeschaltet. Dies hat den Vorteil, dass während der Impulspause der Strom am Ausgang in beiden Richtungen weiter fließen kann und dadurch keine hohen Spannungsspitzen an den MOSFETs entstehen.The claim 6 describes the switching states at the end of the square wave Ua. At the end of the square wave voltage Ua a pulse break is generated and after the pulse break all MOSFETs are turned off. This has the advantage that during the pulse break the current at the output can continue to flow in both directions and thus no high voltage peaks occur at the MOSFETs.
Der Anspruch 7 beschreibt die Dauer der Impulspausen. Die Dauer der Impulspausen ist ein Vielfaches der Periodendauer der Rechteckimpulse. Diese Zeit wird eingestellt, wenn am Ausgang Schwingkreise aus Spulen und Kondensatoren angeschlossen sind.The claim 7 describes the duration of the pulse pauses. The duration of the pulse pauses is a multiple of the period of the rectangular pulses. This time is set when resonant circuits of coils and capacitors are connected to the output.
Der Anspruch 8 beschreibt die Zeit Differenz zwischen dem Ausschalten der MOSFETs und dem Einschalten der MOSFETs bei den Schaltflanken. Bei Rechteckimpulsen im Megahertz Bereich sind diese Zeiten deutlich unter 100ns.The
Claims (8)
Priority Applications (1)
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DE102017006328.1A DE102017006328A1 (en) | 2017-07-05 | 2017-07-05 | Circuit arrangement of a generator for generating a square-wave voltage with pulse intervals |
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DE102017006328.1A DE102017006328A1 (en) | 2017-07-05 | 2017-07-05 | Circuit arrangement of a generator for generating a square-wave voltage with pulse intervals |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10158794B4 (en) * | 2001-11-30 | 2008-05-29 | Friwo Gerätebau Gmbh | Inductive contactless power transformer |
US20130009475A1 (en) * | 2011-07-08 | 2013-01-10 | Contec Co., Ltd. | Non-contact power feeding apparatus |
JP2013027257A (en) * | 2011-07-26 | 2013-02-04 | Ge Medical Systems Global Technology Co Llc | Inverter device and image diagnostic apparatus |
DE102008012089B4 (en) * | 2008-02-29 | 2015-06-11 | TRUMPF Hüttinger GmbH + Co. KG | Method for driving a full bridge, and arrangement for carrying out the method |
US20160172988A1 (en) * | 2014-12-15 | 2016-06-16 | Delta Electronics, Inc. | Electronic apparatus and control method of electronic apparatus |
-
2017
- 2017-07-05 DE DE102017006328.1A patent/DE102017006328A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10158794B4 (en) * | 2001-11-30 | 2008-05-29 | Friwo Gerätebau Gmbh | Inductive contactless power transformer |
DE102008012089B4 (en) * | 2008-02-29 | 2015-06-11 | TRUMPF Hüttinger GmbH + Co. KG | Method for driving a full bridge, and arrangement for carrying out the method |
US20130009475A1 (en) * | 2011-07-08 | 2013-01-10 | Contec Co., Ltd. | Non-contact power feeding apparatus |
JP2013027257A (en) * | 2011-07-26 | 2013-02-04 | Ge Medical Systems Global Technology Co Llc | Inverter device and image diagnostic apparatus |
US20160172988A1 (en) * | 2014-12-15 | 2016-06-16 | Delta Electronics, Inc. | Electronic apparatus and control method of electronic apparatus |
Non-Patent Citations (1)
Title |
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maschinelle Übersetzung zu JP 2013-27 257 A * |
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