The difference between transformer isolation and non-isolation

In modern industrial production, the power system is an important energy supply guarantee. In power systems, transformers are important power conversion devices, and their function is to convert voltage. At this time, the isolation or non-isolation of the transformer has attracted people's attention. This article will explain in detail the difference between transformer isolation and non-isolation from the following aspects.

1. Definition of isolation transformer and non-isolation transformer

Isolation transformer refers to the space between the input and output coils of the transformer. Due to the existence of isolation material, the two do not exist. Without any physical contact, the mercury rectifier and electrolytic capacitor in the energy storage device also have an isolation function, ensuring the isolation of the output power supply from ground. Therefore, the isolation transformer becomes a safety transformer. The isolation transformer actually uses the principle of an AC DC coupling transformer.

Non-isolating transformers are transformers that do not have any physical or electrical isolation between the input and output coils. The input and output ends of the non-isolating transformer are both grounded, and the power output is connected to the input end ground, so it is also called an ordinary transformer. Non-isolating transformers do not have the function of isolating the power supply and the load when transmitting electrical energy.

2. Safety of isolation transformers and non-isolation transformers

Isolation transformers are safer because they can relatively isolate input and output. At the same time, due to its isolation characteristics, isolation transformers are widely used in some electrical equipment with high safety requirements, such as electronic computers, medical equipment, etc.

Instead of an isolation transformer, its input and output are both grounded, and there is no electrical isolation between them, which poses certain safety risks. Failure to disconnect the line when the power supply is still supplying may cause excessive current and even endanger human life.

3. Performance of isolation transformer and non-isolation transformer

The output end of the isolation transformer is isolated from the power supply, and there is no grounding or mutual influence. Therefore, when the isolation transformer transmits power, It is relatively stable and is not prone to abnormal circuit behavior due to other external factors. At the same time, due to the electrical isolation between the isolation transformer and the non-isolation transformer, the voltage control accuracy between the two is also different.

Due to the direct electrical connection between the power supply and the output end, the non-isolating transformer can transmit power more stably than the current generated by the isolation transformer, and can respond to load changes more happily, but it will be more susceptible to electrical interference. .

4. Scope of application of isolation transformers and non-isolation transformers

Isolation transformers can be widely used in modern important fields, such as medical care, industrial automation, communications, power system control, etc. . For some fields that have higher requirements on the stability and safety of power supply, isolation transformers are indispensable. At the same time, isolation transformers are also very suitable for circuits that require high control accuracy.

For fields that require high voltage stability and low transmission compression requirements when transmitting power, non-isolating transformers are more suitable. Non-isolating transformers are often used in homes, office environments, industrial use areas, transportation fields, etc.

In summary, isolation transformers and non-isolation transformers have their own advantages and should be selected according to different needs. At the same time, safety, performance, scope of application and other factors must be taken into consideration during the selection process to achieve the best electrical effect.