Some isolation refers to the electrical isolation between input and output, input and ground, output and output. The function of isolation is to protect the safety of the system. When there is interference or pulse at one end, it will not affect the other due to mutual isolation. part.
In laboratories or high-demand occasions, for the safety of the experimenters, the input power of the experiment is generally isolated from the mains with a 1:1 industrial frequency transformer, so that no matter which line of the line is touched by the laboratory experimenter There is no risk of electric shock, because the isolated power supply is not connected to the earth.
In industrial control equipment, it is sometimes required to isolate the power supply and ground wire between the two systems, such as isolating ground wire noise, isolating high common-mode voltage, etc. A DC converter with a transformer is used to separate the two power supplies to make They are independent of each other, so as to achieve the above purpose!
Each module is powered separately to prevent one module from being damaged by high-voltage discharge or other reasons and causing damage to other modules. The purpose of this is to ensure that each module works independently without interference.
"Isolation" refers to the isolation between the input and output ends with an isolation transformer, which may be power frequency or high frequency. But it can isolate the input and output. The risk of electric shock can be avoided.
What kinds of isolation are divided into:
Two ends isolation: input and output are isolated from each other
Three-terminal isolation: input, output, power supply
Four-terminal isolation: signal input, signal output, power input, isolated power output
The main function of isolated power supply module:
1. Safety isolation: strong and weak current isolation IGBT isolation drive surge isolation protection lightning isolation protection (such as isolation protection of medical electronic equipment in contact with the human body);
2, noise isolation: (analog circuit and digital circuit isolation, strong and weak signal isolation);
3. Ground loop elimination: remote signal transmission distributed power supply system.
4, voltage conversion
Regulated AC mains power supply, remote DC power supply, distributed power supply system battery power supply.