Transformer

Transformers can not only step down but also step up. Long-distance power transmission generally uses transformers to step up the voltage. The use of a transformer to reduce the voltage to the voltage we need at the place of electricity consumption is not true of DC transformers. To convert the voltage of DC power, first use electronic components to convert DC power to AC power and then use a transformer to convert the voltage. This device is called an inverter.

Transformer is a device that can change the voltage made by the principle of electromagnetic induction. The transformer consists of an iron core and a coil. The transformer coil is divided into a primary coil and a secondary coil when the primary coil is energized with alternating current. The transformer core produces an alternating magnetic field. The secondary coil induces an alternating current transformer with the same frequency as the primary. The winding ratio of the transformer coil is equal to the voltage ratio. For example, the primary coil of a transformer has 880 coils and the secondary coil has 88 coils. Connect 220V voltage at the primary level. The secondary will output an AC voltage of 22V.

The difference between DC transformer and AC transformer:

1. Features of DC transformer:

Both DC transformer and on-load voltage regulation refer to the voltage regulation method of the transformer tap switch. The difference is that the non-excitation voltage regulation switch does not have the ability to switch gears with load, because this kind of tap switch has In the short-term disconnection process, disconnecting the load current will cause arcing between the contacts to burn the tap changer or short-circuit, so the transformer must be powered off when adjusting gears. Therefore, it is generally used for transformers that do not require very strict voltage requirements and do not need to be adjusted frequently. On the other hand, the on-load tap-changer can switch gears with load, because the on-load tap-changer does not have a short-term disconnection process in the process of gear adjustment. After a transition resistance transition, it can switch from one gear to another. Therefore, there is no arcing process in which the load current is disconnected. It is generally used for transformers that have strict voltage requirements and need to be adjusted frequently.

2. Features of AC transformer:

The AC transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the purpose, it can be divided into: power transformer and special transformer.

Summary: AC has the function of stabilizing current. In the operation of AC transformer, short circuit and no-load operation will occasionally occur. AC transformer will automatically adopt stable voltage to avoid transformer failure and use problems. The difference is that direct current converges from the initial current to the terminal current, and is commonly used in a wide range of applications such as storage batteries, power banks, and electric vehicle batteries.