There are many classification methods for regulated power supply. There are DC regulated power supply and AC regulated power supply according to the type of output power supply; there are series regulated power supply and parallel regulated power supply according to the connection method of regulated circuit and load DC regulated power supply; According to the working state of the adjusting tube, there are linear regulated power supply and switching regulated power supply; according to the circuit type, there are simple regulated power supply and feedback regulated power supply.
We first talk about DC regulated power supplies, which can be classified into two categories, including linear and switching.
1. Linear power supply
A common characteristic of a linear stable power supply is that its power device adjustment tube works in the linear region, and the output is stabilized by the voltage drop between the adjustment tubes. Due to the large static loss of the adjustment tube, a large radiator needs to be installed to dissipate heat. And because the transformer works on the power frequency (50Hz), it is heavy.
The advantages of this type of power supply are high stability, low ripple, high reliability, easy to make multi-channel, continuous adjustable output. The disadvantage is that it is bulky, heavy, and relatively inefficient. There are many kinds of such stable power supplies, from the nature of the output can be divided into regulated power supply and steady current power supply and stabilized current and steady current (bistable) power supply. From the point of view of output value, it can be divided into fixed-point output power supply, band switch adjustment type and potentiometer continuously adjustable. The output instructions can be divided into pointer indication type and digital display type and so on.
2. Switching power supply
A type of stable power supply that is different from a linear regulated power supply is a switching DC stabilized power supply. Its circuit types mainly include single-ended flyback, single-ended forward, half-bridge, push-pull and full-bridge. The fundamental difference between it and a linear power supply is that its transformer does not work at power frequency but works at tens of kilohertz to several megahertz. The function tube is not working in the saturation and cut-off area, that is, the switching state; the switching power supply is named accordingly.
The advantages of the switching power supply are small size, light weight, stable and reliable; the disadvantage is relatively large ripple compared to the linear power supply (generally ≤1% VO (PP), good can be more than ten mV (PP) or less) . Its power can be from a few watts to several kilowatts. The price is 3 yuan-more than one hundred thousand yuan / watt, the following is a general introduction to several types of switching power supply:
(1) AC / DC
This type of power supply is also called a primary power supply. It obtains energy from the power grid and obtains a DC high voltage through high-voltage rectification and filtering. The DC / DC converter obtains one or several stable DC voltages at the output end. The power ranges from several watts to several kilowatts. There are products for different occasions. There are many specifications and models of this type of product, and the primary power supply (AC220 input, DC48V or 24V output) in the communication power supply depends on the user's needs.
(2) DC / DC
It is also called secondary power supply in the communication system. It is a primary power supply or a DC battery pack to provide a DC input voltage. After DC / DC conversion, one or several DC voltages are obtained at the output end.
We first talk about DC regulated power supplies, which can be classified into two categories, including linear and switching.
Power supply
1. Linear power supply
A common characteristic of a linear stable power supply is that its power device adjustment tube works in the linear region, and the output is stabilized by the voltage drop between the adjustment tubes. Due to the large static loss of the adjustment tube, a large radiator needs to be installed to dissipate heat. And because the transformer works on the power frequency (50Hz), it is heavy.
The advantages of this type of power supply are high stability, low ripple, high reliability, easy to make multi-channel, continuous adjustable output. The disadvantage is that it is bulky, heavy, and relatively inefficient. There are many kinds of such stable power supplies, from the nature of the output can be divided into regulated power supply and steady current power supply and stabilized current and steady current (bistable) power supply. From the point of view of output value, it can be divided into fixed-point output power supply, band switch adjustment type and potentiometer continuously adjustable. The output instructions can be divided into pointer indication type and digital display type and so on.
（Linear power supply）
2. Switching power supply
A type of stable power supply that is different from a linear regulated power supply is a switching DC stabilized power supply. Its circuit types mainly include single-ended flyback, single-ended forward, half-bridge, push-pull and full-bridge. The fundamental difference between it and a linear power supply is that its transformer does not work at power frequency but works at tens of kilohertz to several megahertz. The function tube is not working in the saturation and cut-off area, that is, the switching state; the switching power supply is named accordingly.
The advantages of the switching power supply are small size, light weight, stable and reliable; the disadvantage is relatively large ripple compared to the linear power supply (generally ≤1% VO (PP), good can be more than ten mV (PP) or less) . Its power can be from a few watts to several kilowatts. The price is 3 yuan-more than one hundred thousand yuan / watt, the following is a general introduction to several types of switching power supply:
(1) AC / DC
This type of power supply is also called a primary power supply. It obtains energy from the power grid and obtains a DC high voltage through high-voltage rectification and filtering. The DC / DC converter obtains one or several stable DC voltages at the output end. The power ranges from several watts to several kilowatts. There are products for different occasions. There are many specifications and models of this type of product, and the primary power supply (AC220 input, DC48V or 24V output) in the communication power supply depends on the user's needs.
(2) DC / DC
It is also called secondary power supply in the communication system. It is a primary power supply or a DC battery pack to provide a DC input voltage. After DC / DC conversion, one or several DC voltages are obtained at the output end.
（Switching power supply）
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