There are several categories of power supplies, and what are the classifications of power supplies

Three-phase power, single-phase power and DC power.

Three-phase power supply, single-phase power supply.

Special power supply can be subdivided into: shore power supply, security power supply, high-voltage power supply, medical power supply, military power supply, aerospace power supply, laser power supply, and other special power supplies.

Special power supply refers to special types of power supply. The so-called special is mainly due to the technical index requirements of measuring the power supply are different from the commonly used power supply, which is mainly due to the particularly high output voltage, the output current is particularly large, or the stability, dynamic response and ripple requirements are particularly high, or the voltage or current output of the power supply is pulse or some other requirements.

This makes the design and production of such power supplies have more special and even more stringent requirements than ordinary power supplies. Special power supplies are generally designed for special loads or occasion requirements, and it has a wide range of applications. The main ones are:

Electroplating electrolysis, anodizing, induction heating, medical equipment, power operation, power test, environmental protection dust removal, air purification, food sterilization, laser infrared, photoelectric display, etc.

In national defense and military, special power supplies have irreplaceable uses for ordinary power supplies, mainly used for: radar navigation, high-energy physics, plasma physics and nuclear technology research.

1. High-voltage power supply for radar transmitter

In modern radar transmitters, traveling wave tubes (TWTs) are used as microwave power amplifier devices for a large proportion, as a high-power part, its reliability and technical indicators have a direct impact on radar transmitters and even the entire radar. The high-voltage power supply (system) that supports the traveling wave tube is even more important.

As a high-frequency, high-efficiency power electronics technology, switching power supply technology has been developed with the continuous updating of electronic components and products, and the upgrading of high-power devices. The high-voltage switching power supply for radar traveling wave tube can adopt full-bridge resonant PWM modulation, and the high-power switching device adopts advanced IGBT module and advanced and reliable driving circuit, so that the overall performance of the power supply is good, the stability is good, and it has various protection functions.

Working principle: 50Hz three-phase 380V is passed through the grid filter, and a DC voltage of more than 500 volts is obtained through rectification and filtering, which is supplied to the series resonant converter. Because the output of this power supply is as high as 20kV, in order to reduce the design difficulty of the transformer, reduce the withstand voltage value of the high-voltage rectifier diode, and improve the reliability of the power supply, the two secondary stages of the transformer are used to rectify the full-bridge respectively, and then superimpose the output.

The full-bridge converter consists of four IGBTs, a high-frequency transformer, and a rectifier circuit. The control circuit provides two pairs of pulses that are isolated from each other and have a phase difference of 180° to the IGBT drive circuit to control the IGBT on/off. The DC voltage is converted into an alternating 20kHz pulse voltage, and the voltage of tens of kV is obtained through the transformer and the full-bridge rectification and filtering circuit.

1. Classification of ordinary power supply: disturbing and dismantling.

Switching power supply, inverter power supply, AC regulated power supply, DC regulated power supply, DC power supply, stabilized power supply, communication power supply, module power supply, frequency conversion power supply, UPS power supply, EPS emergency power supply, purification power supply, PC power supply, rectifier power supply, customized power supply, heating power supply, welding power supply, electroplating power supply, network power supply, power operation power supply, adapter power supply, linear power supply and other slow jujube ordinary power supply.

2. Classification of special power supply:

Security power supply, high voltage power supply, medical power supply, military power supply, aerospace power supply, laser power supply and other special power supplies.

Three-phase power supply and single-phase power supply.

1. Three-phase power supply: it can be divided into three-phase four-wire system and three-phase three-wire system, which mainly provides three-phase 380V (volt) power electricity. The three-phase four-wire system provides a three-phase 380V power supply, and a single-phase 220V power supply is also available.

Residential electricity generally does not use three-phase power supply.

2. Single-phase power supply: From the three-phase four-wire system, a phase (igneous rock) line and a neutral line are drawn out to form a single-phase power supply, with a voltage of AC 220V (volts).

Three-phase power supply and single-phase power supply.

Hetan 1, three-phase power supply: can be divided into three-phase four-wire system and three-phase three-wire system, here is mainly to provide three-phase 380V (volt) power electricity. The three-phase four-wire system provides three-phase 380V power such as Huaiyuan, and also provides single-phase 220V power supply.

Residential electricity generally does not use three-phase power supply.

2. Single-phase power supply: from the three-phase four-wire slag system, a phase (fire) wire and a neutral line are drawn out to form a single-phase power supply, and the voltage is AC 220V (volts), and this power supply mode is mainly used for domestic electricity.

AC power and DC power.

AC power supply is divided into sinusoidal alternating current and non-sinusoidal alternating current, sinusoidal alternating current has single-phase sinusoidal alternating current and three-phase sinusoidal alternating current.

DC power supply is divided into battery and rectified DC power.