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Statements

Subject Item

dbr:Push–pull_converter

rdf:type

dbo:Software

rdfs:label

推挽轉換器 Conversor Push-Pull Двухтактный преобразователь Convertitore Push-Pull Gegentaktflusswandler Push–pull converter

rdfs:comment

推挽轉換器（push–pull converter）是一種直流-直流轉換器，是用变压器改變直流供應器電源電壓的開關模式電源。推挽轉換器的特點是變壓器的初級電流是由一對對稱的電晶體推挽输出所提供。二個電晶體會輪流開啟，輸流關閉，周期性的使變壓器上的電流反向流動。因此，在切換週期的二個半周當中，電路都會從電源抽取電流。這和降壓-升壓變換器相反，降壓-升壓變換器只有單一電晶體打開或關閉，因此電路只是在其中一半的週期中，從電源抽取電流，另外一半的週期，是由儲能的電容器或電感器輸出能量。推挽轉換器的輸入電流比較穩定，輸入模組的噪音較小，在高功率的應用中效率會比較高。 Um conversor push–pull é um tipo de conversor CC/CC que utiliza um transformador para alterar o nível de tensão de uma fonte de corrente contínua. Pode-se usar qualquer relação de transformação, desde que fixa; contudo, em vários circuitos, a razão cíclica do processo de chaveamento pode ser implementado de forma a variar os limites de tensão alcançados. Tem ganho aproximadamente igual a 1. Semelhante ao e, em especial, ao , os conversores push-pull utilizam-se do para obter na saida tensões menores ou maiores. As principais vantagens dos conversores push-pull são: Двухтактный преобразователь — преобразователь напряжения, использующий импульсный трансформатор. Коэффициент трансформации трансформатора может быть произвольным. Несмотря на то, что он фиксирован, во многих случаях может варьироваться ширина импульса, что расширяет доступный диапазон стабилизации напряжения. Преимуществом двухтактных преобразователей является их простота и возможность наращивания мощности. Однофазный двухтактный преобразователь представляет собой двухтактный полномостовой генератор с трансформатором и выпрямитель с фильтром. A push–pull converter is a type of DC-to-DC converter, a switching converter that uses a transformer to change the voltage of a DC power supply. The distinguishing feature of a push-pull converter is that the transformer primary is supplied with current from the input line by pairs of transistors in a symmetrical push-pull circuit. The transistors are alternately switched on and off, periodically reversing the current in the transformer. Therefore, current is drawn from the line during both halves of the switching cycle. This contrasts with buck-boost converters, in which the input current is supplied by a single transistor which is switched on and off, so current is only drawn from the line during half the switching cycle. During the other half the output power is supplied by energy store Un convertitore push-pull è un tipo di convertitore DC/DC a commutazione che utilizza un trasformatore per modificare la tensione di un alimentatore DC. La caratteristica distintiva di un convertitore push-pull è che il trasformatore primario viene alimentato con corrente dalla linea di ingresso da coppie di transistori in un circuito push-pull simmetrico. I transistori sono alternativamente accesi e spenti, invertendo periodicamente la corrente nel trasformatore. Pertanto, la corrente viene prelevata dalla linea durante entrambe le metà del ciclo di commutazione. Ciò contrasta con i convertitori buck-boost, in cui la corrente di ingresso viene fornita da un singolo transistore che viene acceso e spento, quindi la corrente viene prelevata dalla linea solo durante metà del ciclo di commutaz Als Gegentaktflusswandler, Gegentaktdurchflusswandler oder Gegentaktwandler (englisch push–pull converter) bezeichnet man in der Elektronik eine elektronische Schaltung, die eine elektrische Gleichspannung in eine andere elektrische Gleichspannung wandeln kann. Da der Hauptteil der Spannungsumsetzung beim Gegentaktflusswandler durch einen Hochfrequenztransformator erfolgt, kann die Ausgangsspannung nahezu beliebige Größen annehmen, da sie somit nicht durch die Topologie des Wandlers begrenzt ist, wie es beispielsweise beim Aufwärtswandler oder Abwärtswandler der Fall ist.

foaf:depiction

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dbc:DC-to-DC_converters

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3938775

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1009895852

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dbr:Common_drain dbr:Rectifier dbr:MOSFET dbr:Inverter_(electrical) dbr:Common_base n10:Push-pull_converter_schematic.svg dbr:Switching_power_supply dbr:LC_circuit n10:DC-DC-Converter.jpg dbr:Electronic_amplifier dbr:Common_source dbr:DC-to-DC_converter dbr:Transformer dbr:Capacitor dbr:Buck-boost_converter dbr:Push–pull_output dbr:Volt dbr:H-bridge dbc:DC-to-DC_converters n10:Inverter_ckt_01cjc.png dbr:Inductance dbr:Push-pull_output dbr:Remanence

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dbo:thumbnail

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dbo:abstract

推挽轉換器（push–pull converter）是一種直流-直流轉換器，是用变压器改變直流供應器電源電壓的開關模式電源。推挽轉換器的特點是變壓器的初級電流是由一對對稱的電晶體推挽输出所提供。二個電晶體會輪流開啟，輸流關閉，周期性的使變壓器上的電流反向流動。因此，在切換週期的二個半周當中，電路都會從電源抽取電流。這和降壓-升壓變換器相反，降壓-升壓變換器只有單一電晶體打開或關閉，因此電路只是在其中一半的週期中，從電源抽取電流，另外一半的週期，是由儲能的電容器或電感器輸出能量。推挽轉換器的輸入電流比較穩定，輸入模組的噪音較小，在高功率的應用中效率會比較高。 Un convertitore push-pull è un tipo di convertitore DC/DC a commutazione che utilizza un trasformatore per modificare la tensione di un alimentatore DC. La caratteristica distintiva di un convertitore push-pull è che il trasformatore primario viene alimentato con corrente dalla linea di ingresso da coppie di transistori in un circuito push-pull simmetrico. I transistori sono alternativamente accesi e spenti, invertendo periodicamente la corrente nel trasformatore. Pertanto, la corrente viene prelevata dalla linea durante entrambe le metà del ciclo di commutazione. Ciò contrasta con i convertitori buck-boost, in cui la corrente di ingresso viene fornita da un singolo transistore che viene acceso e spento, quindi la corrente viene prelevata dalla linea solo durante metà del ciclo di commutazione. Durante l'altra metà la potenza in uscita viene fornita dall'energia immagazzinata in induttori o condensatori nell'alimentatore. I convertitori push-pull hanno una corrente di ingresso più stabile, creano meno rumore sulla linea di ingresso e sono più efficienti nelle applicazioni che richiedono potenze elevate. A push–pull converter is a type of DC-to-DC converter, a switching converter that uses a transformer to change the voltage of a DC power supply. The distinguishing feature of a push-pull converter is that the transformer primary is supplied with current from the input line by pairs of transistors in a symmetrical push-pull circuit. The transistors are alternately switched on and off, periodically reversing the current in the transformer. Therefore, current is drawn from the line during both halves of the switching cycle. This contrasts with buck-boost converters, in which the input current is supplied by a single transistor which is switched on and off, so current is only drawn from the line during half the switching cycle. During the other half the output power is supplied by energy stored in inductors or capacitors in the power supply. Push–pull converters have steadier input current, create less noise on the input line, and are more efficient in higher power applications. Двухтактный преобразователь — преобразователь напряжения, использующий импульсный трансформатор. Коэффициент трансформации трансформатора может быть произвольным. Несмотря на то, что он фиксирован, во многих случаях может варьироваться ширина импульса, что расширяет доступный диапазон стабилизации напряжения. Преимуществом двухтактных преобразователей является их простота и возможность наращивания мощности. Однофазный двухтактный преобразователь представляет собой двухтактный полномостовой генератор с трансформатором и выпрямитель с фильтром. Als Gegentaktflusswandler, Gegentaktdurchflusswandler oder Gegentaktwandler (englisch push–pull converter) bezeichnet man in der Elektronik eine elektronische Schaltung, die eine elektrische Gleichspannung in eine andere elektrische Gleichspannung wandeln kann. Da der Hauptteil der Spannungsumsetzung beim Gegentaktflusswandler durch einen Hochfrequenztransformator erfolgt, kann die Ausgangsspannung nahezu beliebige Größen annehmen, da sie somit nicht durch die Topologie des Wandlers begrenzt ist, wie es beispielsweise beim Aufwärtswandler oder Abwärtswandler der Fall ist. Aufgrund der durch den Transformator folglich potentialfreien Ausgangsspannung wird der Gegentaktflusswandler zur Gruppe der galvanisch getrennten Gleichspannungswandler gezählt. Um conversor push–pull é um tipo de conversor CC/CC que utiliza um transformador para alterar o nível de tensão de uma fonte de corrente contínua. Pode-se usar qualquer relação de transformação, desde que fixa; contudo, em vários circuitos, a razão cíclica do processo de chaveamento pode ser implementado de forma a variar os limites de tensão alcançados. Tem ganho aproximadamente igual a 1. Semelhante ao e, em especial, ao , os conversores push-pull utilizam-se do para obter na saida tensões menores ou maiores. As principais vantagens dos conversores push-pull são: * capacidade de trabalhar com potências de trabalho maiores em corrente contínua (devido ao uso dos dois chaveadores), sendo utilizados em aplicações de industriais; * Maior rendimento no trafo, devido à forma de construção; * Robustez e simplicidade de construção; * O negativo da fonte é um terminal comum a ambos os chaveamentos.

gold:hypernym

dbr:Converter

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wikipedia-en:Push–pull_converter?oldid=1009895852&ns=0

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6471

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wikipedia-en:Push–pull_converter