Switching power adapter circuit is a kind of power electronic circuit

In addition to the power adaptors provided by the utility grid and batteries, the power adaptors obtained from diesel generators, wind turbines and solar cells are also classified as direct power adaptors.

Power adapter manufacturer: the input and output of the switching power adapter described by Jiuqi are all electric energy, so it belongs to the indirect power adapter and is the main research object of the power adapter manufacturer: Jiuqi, while the direct power adapter does not belong to the power adapter manufacturer: Jiuqi.

Switching power adapter circuit is a kind of power electronic circuit. Generally, power is divided into two categories: AC and DC.

Therefore, the basic power electronic circuits can be divided into four types, namely, ACDC circuit DC · AC circuit, AC-AC circuit and DC-DC circuit, as shown in Table 1-1. ACDC and DC · AC are generally easy to understand. For the ACAC circuit, the objects that can be transformed include frequency, number of phases, voltage and current, etc. For DCDC circuits, the main objects that can be transformed are voltage and current. The core components of power electronic circuits are power electronic devices, which are generally working in the switch state, so that the loss is very small, which is a significant feature of power electronic circuits.

As the name implies, the switching power adapter is the power adapter in which the power electronic devices work in the switching state. In this way, if the four basic types of power electronic circuits in Table 1 are regarded as power adapter circuits, all power electronic circuits can also be regarded as switching power adapter circuits. In practice, the scope of the switch power adapter is much smaller than that in the table. For example, the phase control circuit in the rectifier circuit does not belong to the scope of the switch power adapter.

AC transformer