In some cases, isolation refers to the electrical isolation between input and output, input and ground, and output and output. The function of isolation is to protect the safety of the system. When there is interference or pulse at one end, the isolation will not affect the other. part.
In the laboratory or high-demand occasions, for the safety of the experimenters, the input power supply of the experiment is generally isolated from the mains by a 1:1 power frequency transformer, so that the laboratory experimenter will encounter no matter which line of the line There is no risk of electric shock because the isolated power supply is not connected to the ground.
In industrial control equipment, it is sometimes required to isolate the power supply ground wire between the two systems, such as isolating ground wire noise, isolating high common-mode voltage, etc., using a DC converter with a transformer to separate the two power supplies so that the They are independent of each other to achieve the above purpose!
Each module is powered independently to prevent one module from being damaged due to high voltage discharge or other reasons and affecting other modules. The purpose of this is to ensure that each module works independently without interference.
Isolation means that there is an isolation transformer between the input end and the output end. This transformer may be power frequency or high frequency. But it can isolate the input and output. The risk of electric shock can be avoided.
What are the types of isolation:
Isolation at both ends: Input and output are isolated from each other
Three-terminal isolation: input, output, power
Four-terminal isolation: signal input, signal output, power input, isolated power output
The main function of the isolated power 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 human body);
2. Noise isolation: (analog circuit and digital circuit isolation, strong and weak signal isolation);
3. Ground loop elimination: Distributed power supply system for remote signal transmission.
4. Voltage conversion
Regulated AC mains power supply remote DC power supply distributed power supply system battery power supply.