Is a power adapter equivalent to a transformer?

The power adapter does act as a transformer, allowing the higher AC voltage to be lowered to a DC operating voltage suitable for a mobile phone battery.

If you connect the output of the power adapter to a dry battery, you can indeed charge the battery.

If you connect the power adapter to a dry battery, the power adapter will not work properly because the battery voltage is too low, that is, you cannot charge the phone.

Hello, the power adapter is indeed equivalent to a transformer, so that the large voltage drops to the appropriate working voltage of the mobile phone. If you connect the power adapter to the dry battery, you can't charge the phone, because the DC battery does not work on the AC transformer.

No, a transformer should be a device that is impedance matched for maximum power transfer.

On the other hand, "the power adapter is a transformer" is not satisfactory, at least the general power adapter contains a transformer.

As a power adapter, it needs to transform the general power supply into the power supply required by a certain device, and the voltage, current, impedance and other aspects are matched, of course, it needs a transformer. Since it has the function of changing voltage, it doesn't hurt to call it a "transformer". What I want to say is that the power adapter is not only transformer, but also needs to achieve other parameters other than voltage, for example, the simplest general-purpose DC adapter has a "rectification" process in addition to transformer.

And the transformer, in a narrow sense, is just a kind of component, like resistors, capacitors, transistors, and so on.

Hello, I am glad to answer your questions and find out for you whether it can be universal, because different specifications of power adapters can not be universal. We must pay attention to this, don't think that it doesn't matter if you use it once or twice temporarily, it's better to put an end to it. Look at the voltage between uses, and the voltage must be consistent, otherwise it will burn out the appliance or cause it to not work.

In addition, the "output current" of the power adapter must be greater than the working current of the electrical appliance, otherwise, the power adapter will burn out because of the "overcurrent", sometimes we will find that our electronic products are still good before, but for some reason suddenly can not start, at this time you have to consider whether you can replace the power adapter casually. If the interface between the power adapter and the electronic product is inconsistent, do not replace the interface casually. When using the power adapter, the lower and lower polarities should be consistent, otherwise accidents will also occur.

I hope it helps you [Bixin] [Bixin].

Not universal. The 12V power adapter cannot replace the 9V power adapter, which will lead to the danger of directly burning out the equipment; The 9V voltage is replaced by a 12V power adapter, and the low voltage will cause the device to have no signal or no start.

Generally speaking, the power adapter functions as a transformer and rectifier. Household AC is 220V, while computer land is 12V. Therefore, it is certain that the power adapter is a transformer and rectifier. The adapter is a transformer.

The difference between these two power adapters is that the output current is 4 amps on one and 5 amps on the other. Their output voltage is the same.

Power adapter (power adapter) is a small portable electronic equipment and electronic appliances power supply conversion equipment, generally composed of shell, power transformer and rectifier circuit, according to its output type can be divided into AC output type and DC output type; According to the connection method, it can be divided into wall type and desktop type. It is widely used in sub-parent machines, game consoles, language repeaters, walkmans, laptops, cellular and other equipment.

There is a difference between two voltages and one voltage for the power adapter, which is the difference between a dual-voltage adapter and a single-voltage adapter.

The dual voltage adapter can be used for two different voltages, such as 110V and 220V, for a wide range of applications. This adapter has a switch that can be adjusted according to local voltage requirements. This adapter is often used for travel or overseas business trips, so that users can use electrical appliances in different countries or regions.

A single-voltage adapter is only suitable for a specific voltage, such as a 220V voltage, and its power and voltage are fixed. Since it is only suitable for one voltage, it has a narrow scope of application and can only be used in specific regions and countries.

It should be noted that if you use a single voltage adapter to work in an inapplicable voltage environment, it may damage the adapter itself, or even damage the electrical equipment, so be sure to choose the right adapter according to the local voltage requirements.

Hello, a power adapter is a device that converts alternating current to direct current and is used to provide power to electronic devices. Power adapters usually have two voltage ranges, i.e., 110V and 220V. This is because different countries and regions have different grid voltage standards.

When using the power adapter, you need to select the corresponding voltage application range according to the voltage standard of your region, otherwise it may cause damage to the device or improper use.

Also, some power adapters only work with one voltage. This type of power adapter is usually designed for a specific device and only needs to meet the voltage and current required for that device. This type of power adapter is usually more portable and compact than a universal power adapter.

In short, there is a difference between two voltages and one voltage for the power adapter, and you need to choose the corresponding power adapter according to the voltage standard of the region and the needs of the equipment.

The power adapter can be used for two voltages, i.e., high voltage and low voltage. High voltage usually refers to voltages above 110V, while low voltages generally refer to voltages below 110V.

High voltage is applied to household appliances such as TVs, washing machines, air conditioners, etc., and its purpose is to reduce the voltage to a safe level to protect the equipment from damage. Low voltage is applied to electronic devices such as mobile phones, computers, etc., and its purpose is to raise the voltage to a safe level so that the device can operate normally.

The power adapter usually shows an input voltage range, such as 100V-240Vac. If you are receiving voltage within this input range, you can use this power adapter normally.

If the power adapter can only be used for one voltage (e.g., only 220VAC), then when connected to other voltages (e.g., 127VAC, 110VAC, etc.), it will not work normally. This power adapter is suitable for use in specific regions and needs to be selected according to the local voltage standard.

Power adapters that are suitable for two voltages and above may be designed to match different voltage ranges in areas where they are used. For example, the 100V-240VAC power adapter can be used even if the voltage is changed for international travel, etc., as long as the voltage at the destination is within this input range, which is more convenient.

In short, choose the power adapter according to your own needs. If you often need to use it across borders and on the go, it is recommended to choose a power adapter that is suitable for a variety of voltage ranges. And if you only need to use it in a fixed place, you can consider a power adapter that can accommodate the specific voltage in that area.

Hello, I am glad to answer for you, the reasons why the power adapter can not be universal are as follows: 1. The "power adapter" of different specifications cannot be universal, and the key points are: The voltage must be consistent, otherwise it will burn out the electrical appliances, or it will not work.

The "output current" of the power adapter must be greater than the operating current of the consumer, otherwise, the power adapter will "overcurrent" and burn out. The interface between the power adapter and the electrical appliance must match, otherwise it cannot be connected. The positive and negative polarities should be consistent to avoid accidents.

2. What kind of power adapter can be universal? The power adapter with appropriate voltage and current not less than the original power supply can be replaced. The voltage is appropriate, that is, as long as the voltage of the power adapter is higher than the battery voltage of the notebook more than 4V, it can be used, otherwise because the voltage is not enough, the working voltage difference required for the charging of the notebook and its protection circuit cannot be opened.

The battery requires a power adapter voltage of 15V or more, and the battery requires a voltage of 19V or more.