The mainstream of power supply technology development

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The mainstream of power supply technology development [Copy link]

The transistor was invented at the end of 1947, and less than a decade later, the silicon-controlled rectifier (SCR, now called thyristor) was invented based on the gradual maturity of the transistor, thus opening the prelude to the rapid development of power supply technology. Over the past half century, the development of power supply technology has continued to innovate.

High-frequency conversion is the mainstream of power technology development

　　The essence of power supply technology is power conversion, that is, using power conversion technology to convert primary power sources such as mains or batteries into secondary power sources suitable for various power users. Switching power supplies occupy an important position in power supply technology. From 20kHz to high-frequency switching power supplies with high stability, large capacity, small size, and switching frequency reaching megahertz, they provide a material basis for high-frequency conversion and promote the prosperity and development of modern power supply technology. The most direct benefit brought by high frequency is to reduce raw material consumption, miniaturize power supply devices, speed up the dynamic response of the system, further improve the efficiency of power supply devices, effectively suppress environmental noise pollution, and enable power supply to enter a wider field, especially the field of high-tech, further expanding its scope of application.

Guidance on new theories and technologies

Circuit topology theories such as resonant conversion, phase-shift resonance, zero-switching PWM, and zero-transition PWM; new technologies such as power factor correction, active clamping, parallel current sharing, synchronous rectification, high-frequency magnetic amplifier, high-speed programming, remote sensing and remote control, and microcomputer monitoring have guided the development of modern power supply technology.

Support of new devices and new materials

　　Insulated gate bipolar transistor (IGBT), power field effect transistor (MOSFET), intelligent IGBT power module (IPM), MOS gate-controlled thyristor (MCT), static induction transistor (SIT), ultrafast recovery diode, non-inductive capacitor, non-inductive resistor, new ferrite, amorphous and microcrystalline soft magnetic alloy, nanocrystalline soft magnetic alloy and other components are equipped with modern power supply technology to promote product upgrading.

Intelligent control

　　The control circuit, drive circuit and protection circuit adopt integrated components. The control circuit adopts full digitalization. The control means adopts software control mode composed of microprocessor and single chip microcomputer, which achieves a high degree of intelligence and further improves the reliability of power supply equipment.

Modularization and integration of power supply circuits

　　The characteristics of the development of power supply technology are modularization and integration of power supply circuits. Monolithic power supply and module power supply replace the whole machine power supply, and power integration technology simplifies the structure of power supply. It has been widely used in communications and electricity, and has derived a new power supply system - distributed power supply, making the centralized power supply system diversified.

Standard Specification for Power Supply Equipment

　　For power supply equipment to enter the market, today's market has become an integrated market that transcends regions and integrates the world. It must comply with common standards such as energy, environment, electromagnetic compatibility, and trade agreements. Power supply equipment manufacturers must accept certification of various standards and specifications such as safety, EMC, environment, and quality systems.