共通 タイプ OF スイッチング 電源 電源 および DC 電圧 レベル 入力 電子 制御 システム
から the 異なる 対応 間 同じ および 同義語 端子 of the 同じ プライマリ 巻線 in the セカンダリ 巻線 of スイッチング 電源 supply, スイッチング 電源 電源 can be 大まかに 分割 into two カテゴリ: フライバック および 自己興奮。 Due to the 相対的 固定 回路 構造 of the フライバック スイッチング 電源 電源; 安定 および 信頼できる; The 利点 そのような as low price are commonly seen in current electronic control systems (add: some of the the integrated switch power modules used in enic control systems are also flyback switch power circuit. The diagram shows two common flyback switch power supply)。
ただし、, due to the limitations of the working principle of flyback switching power supply, their output capacity is mostly between tens of volts to hundreds of volts, and in reality, there are very few products that exceed 1 kilovolt ampere. Interested peers can take a look at the sarounding environment of switching power supply. If you find that the integrated circuit model used is UC3842/43/44/45, it is a typical form of flyback switching power supply (knowledge about this will be discussionsed later)。
Secondly, let's take a look at matters related to the input and output voltages of switching power supplies. Due to some switch power supply manufacturers not only facing the domestic market, but also taking into account the European, American, and Japanese markets, one switch power supply has two input voltage levels: AC110V and AC220V. This type of switching power supply often uses a selector switch installed on the circuit board to complete voltage level selection (as shown in Figure 2). Therefore, before installation and use, we must check whether the input voltage level switch of the switching power supply matches the actual input voltage, otherwise it is very easy to cause damage to the switching power supply!
Next, let's take a look at the DC voltage levels commonly used in practical work. based on the actual situation, we often come into contact with the follow four DC voltage levels in our work:
1, plus 5V: This voltage is usually supplied to the control board containing a microcontroller in the electronic control system, as well as some LED indicator lights;
2, plus 12V: This 電圧 is 広く 中古 in 産業 制御 システム, and ITS 電源 電源 範囲 含む 近接 スイッチ, 赤外線 センサー, ソリッドステート リレー, 小 電磁 リレー, etc;
3, plus 15V: This voltage is usually used by various detection instruments, but it is not very common in practice;
4, plus 24V: This circuit has a voltage level of plus 12V, which is also very commonly used in electronic control systems. In addition to the various loads carried by plus 12V, the plus 24V power supply also serves as the power supply for various touch screens, text editors, touch industrial control integrated machines, and other devices.
