In some isolations, it 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 other due to mutual isolation. section.
For laboratory or high-demand occasions, for the safety of the experimenter, the input power of the experiment is generally isolated from the mains by a 1:1 power frequency transformer, so that the laboratory experimenter touches which line of the line. There is no danger of electric shock because the isolated power supply is not connected to the earth.
In industrial control equipment, power ground isolation between two systems is sometimes required, such as isolated ground noise, isolation of high common-mode voltage, etc., using a DC converter with a transformer to separate the two power supplies, so that They are independent of each other to achieve the above goals!
Each module is individually powered to prevent damage to the module and other modules due to high voltage discharge or other causes. The purpose of this is to ensure that each module works independently and without interference.
Isolation means isolation transformer isolation at the input and output. This transformer may be either a power frequency or a high frequency. But both can isolate the input and output. You can avoid the risk of electric shock.
There are several 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 role of the isolated power module:1. Safety isolation: strong electric weak isolation IGBT isolation drive \ surge isolation protection \ lightning isolation protection (such as isolation protection of medical electronic equipment contacted by 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
Boost conversion\Buck conversion\AC/DC conversion (AC/DC, DC/AC)\Polarity conversion (positive and negative polarity conversion, single supply and positive and negative power conversion, single supply and multiple power conversion).
Regulated AC mains supply\remote DC power supply\distributed power supply system\battery supply.
details as following;
1. Purify the power supply.
In the original power distribution system, there are some kinds of equipment such as mechanical equipment, high-frequency equipment, sparks, etc. These loads often cause some modulation interference to the power supply, such as the inrush current generated by the starting and stopping of the heavy-duty equipment. Some of the second harmonics generated by the device itself are in turn carried on the power supply. Some devices that require high power quality (such as precision instruments) require an isolated power supply.
2. Safe power supply.
The neutral point in the three-phase power supply sent by the power plant is connected to the earth, and the zero line on the low-voltage side is actually grounded. Thus, if the human body touches the fire line and the ground, it is equivalent to the distribution system. It is dangerous to use isolated power for safety in some specific situations. It is isolated from the original distribution system. Not sharing the original system.
In some laboratories or high-demand occasions, for the safety of the experimenter, the input power of the experiment is generally isolated from the mains by a 1:1 power frequency transformer, so that the laboratory experimenter does not touch any of the lines. There is no danger of electric shock on the root line because the isolated power supply is not connected to the earth.
In industrial control equipment, power ground isolation between two systems is sometimes required, such as isolated ground noise, isolation of high common-mode voltage, etc., using a DC converter with a transformer to separate the two power supplies, so that They are independent of each other to achieve the above objectives. Each module is powered separately to prevent a module from being damaged by high voltage discharge or other causes. The purpose of this is to ensure that each module works independently and without interference.
Internal Axial Fan,Axial Inline Fan,Blower Axial,Small Axial Fan
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