This section provides overview, applications, and principles of dc power supplies. Also, please take a look at the list of 66 dc power supply manufacturers and their company rankings.
Table of Contents
A DC power supply is a power supply device that provides DC power.
There are two types of power supplies: DC and AC. A DC power supply is a power supply in which the direction of current and voltage is always in one direction. An AC power supply is a power supply that periodically switches the direction of current and voltage.
Commercial power supplies supplied by electric power companies are generally AC power supplies, which can easily change voltages and shut down. In contrast, semiconductors require DC power for operation, so the power supplied to electronic products must be DC.
Therefore, DC power supply is primarily used for the operation of electronic products.
DC power supplies are used in a wide range of applications, from everyday products to huge equipment in the industrial field. The following are examples of use
Many home appliances also have DC power supplies inside, but some home appliances, such as fans and incandescent light bulbs, do not have DC power supplies units because they use AC power directly.
A DC power supplies (AC-DC power supplies) rectifies and regulates AC power to DC power.
There are three main types of DC power supplies systems: shunt regulation system, series regulation system, and switching regulation system.
In the shunt regulation method, a diode and a resistor are connected in series between input and output.
Since AC power can only pass through the diode in a certain direction, DC power is output at the output end.
Although the structure is simple, the heat loss due to the resistance is large, resulting in the lowest efficiency among the three methods. 2.
In the series regulation method, elements such as transistors are connected in series between input and output.
Since AC power can only pass through the transistor in a certain direction, DC power is output at the output end.
In the switching regulation method, a switching element switches the AC power supply in the direction of current and voltage. As a result, a constant direction and averaged DC power supplies are output.
As mentioned earlier, there are two types of power supplies: DC and AC. The features of DC and AC power supplies are listed below.
Features of DC power sources
Features of AC Power
Because of the above features, commercial power supplies used by power companies are AC power supplies because they are suitable for large power supplies.
However, in recent years, DC power transmission, which does not require consideration of transient stability and has low loss, is also being considered for high-power transmission.
DC power supplies come in various types and sizes, but all operate in either constant voltage or constant current mode.
DC power supplies built into products often operate in either mode only. Many DC power supplies devices for testing and other applications can be manually switched between each mode, so the mode can be changed according to the application.
*Including some distributors, etc.
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Ranking as of January 2023 in United States
Derivation MethodRank | Company | Click Share |
---|---|---|
1 | NetSource Technology, Inc. | 50% |
2 | DATEL | 50% |
Ranking as of January 2023 Globally
Derivation MethodRank | Company | Click Share |
---|---|---|
1 | NetSource Technology, Inc. | 50% |
2 | DATEL | 50% |
Derivation Method
The ranking is calculated based on the click share within the dc power supply page as of January 2023. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
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