業界ニュース

単巻変圧器と絶縁変圧器の違いは何ですか?

2020-08-14
オートトランスの紹介
オートトランス一次巻線と二次巻線が同じ巻線上にあるトランスを指します。構造により、圧力調整式と固定式に分けられます。自動結合とは、電磁結合を意味します。通常の変圧器は、一次コイルと二次コイルの電磁結合を介してエネルギーを伝達します。一次側と二次側の間に直接の電気的接続はありません。単巻変圧器の一次側と二次側には直接電気接続があります。その低電圧コイルそれは高電圧コイルの一部です。オートトランスなどの保護具は、通信回線の保護具にも使用されています。
ザ・オートトランス is a self-coupling transformer. ザ・オートトランス has a relatively simple structure and low cost. ザ・input/output and the neutral line are shared. ザ・secondary side of the transformer is part of the primary side. ザ・primary and secondary sides share a winding, like one ザ・two coils that come out of the wire, the two coils use the difference between the large and small currents to cut the magnetic lines to transform the voltage. It is generally used in the boost of DC power. ザ・output and input of the transformer are directly electrically connected, and the safety performance difference.

絶縁トランスの導入
絶縁トランス refers to a transformer with electrical isolation between the input winding and the output winding. ザ・絶縁トランス is used to avoid accidentally touching the charged body at the same time. ザ・isolation of the transformer is to isolate the respective currents of the primary and secondary windings. In the early days, it was used in the power industry in European countries, and it was widely used in the electronics industry or industrial and mining enterprises, machine tools and mechanical equipment in general circuit control power, safety lighting and indicator lights.
ザ・main function of the絶縁トランス is to isolate the electrical equipment from the grid. Used in safety occasions or occasions with anti-interference requirements. There is no direct electrical connection between the electrical equipment and the power supply. ザ・isolation structure has many materials and high cost. In addition to changing the voltage, the input winding and output winding can be electrically isolated from each other, and the input/output and neutral line can be isolated to avoid touching the charged body at the same time (or due to insulation damage) Metal parts that may be charged) and the ground. In addition, the絶縁トランス also has a certain effect of suppressing various interferences, with filtering performance and high safety.

ザ・difference between オートトランス and絶縁トランス
1. ザ・difference in structure
絶縁トランス is one of the most common transformers. Its low-voltage and high-voltage winding are wound by separate coils and are not electrically connected. ザ・primary and secondary sides have no direct electrical connection, and the secondary winding are not connected to the earth. .
ザ・primary side and the secondary side of the オートトランス直接電気接続があります。その低電圧コイルは高電圧コイルの一部、つまり電気通路が1つしかない巻線であり、巻線の中央にあるタップが高電圧コイルと低電圧コイルの共通点として機能します。 。

2. ザ・difference in safety factor
Usually, one wire of the AC power supply voltage we use is connected to the earth, and the other wire has a potential difference of 220V or 380V between the earth. Human contact can cause electric shock. ザ・secondary high and low voltage coils of the 絶縁トランス are electrically insulated from each other and are not connected to the ground. There is no potential difference between any two wires of the絶縁トランス and the ground. People will not get an electric shock if they touch any line, so it is safer. Therefore, no matter whether the secondary voltage exceeds the safe voltage value, as long as the human body does not touch the two output points of the secondary at the same time, it will not cause harm to people. This is the advantage of the絶縁トランス. But the volume is large and the cost is high.

ザ・オートトランス高電圧コイルと低電圧コイルの部品が重なっているため、コイルの線材の一部を節約できます。これは、サイズが小さく、コストが低いだけではありません。ただし、降圧トランスの低電圧側の出力電圧が非常に低くても、2つの巻線が共通の部分を持っているため、一次側の高電圧も「逃げる」ため、高電圧コイルと低電圧コイルが接続されます。二次側のコイルに入れます。これは人にとって非常に簡単です。痛い。

3. ザ・difference in use
Three-phase絶縁トランスs are mainly used in power systems, power loads of industrial and mining enterprises, and the power supply that requires isolation from the power grid is magnetoelectric, which is used as a power device for precision measurement and test purification (anti-interference) power supply and power grid. 絶縁トランスs are safe power supplies and are generally used for machine maintenance to protect, prevent lightning, and filter.

ザ・primary side and the secondary side of the オートトランス互いに直接接続されています。ラインが損傷したり漏れたりすると、人に危害を加える可能性が非常に高くなります。一般的に安全要件の低い場所で使用され、電圧を機器の要求電圧に合わせるために電圧を変更するだけで済みますが、機器に漏れ保護装置を装備することはできず、中性線を接地することはできません。

ザ・working principle of オートトランス and絶縁トランス
オートトランス (Three Phase)


絶縁トランス(三相)
 

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