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Classification of switching power suppliesSwitching power supplies can be divided into AC/DC and DC/DC. As a secondary power supply, DC/DC converter has realized modularization, and the design technology and production process have been mature and standardized at home and abroad, and has been recognized by users. However, due to its own characteristics, the primary power AC/DC has encountered more complex technical problems and manufacturing problems in the process of modularization.

Switch power output protection policyIn all switching power supply designs, protection against load and protection against power supply due to load failure is a very important aspect to be considered in the design. In the design of military products, a kind of work called failure mode and impact analysis is often required. In this work, each part of the circuit is assumed to be an open circuit fault and then a short circuit fault. In this case, analyze separately how each fault will affect the rest of the circuit.

The basic principle of PWM switching power supplyAlthough pulse-width-modulated (PWM) switching power supplies have been around for a long time, they were not widely accepted and used until the mid-1970s. Switching power supplies have many advantages over linear power supplies.For the same power capacity, switching power supplies are more efficient and smaller than linear power supplies, but the design is more complex and electromagnetic interference (EMI) is more severe.There are two approaches to the current design of switching power supplies.

Various techniques for switching power supplies to reduce lossesThe efficiency of PWM switching power supply without special loss control technology is lower than that of switching power supply with loss control technology. For switching power supplies that have no problem with heat dissipation, such as some off-line power supplies, the efficiency may be satisfactory. But for portable power supplies and devices requiring small size, greater efficiency must be sought.

Design of a low power semiconductor laser driving power supplyWith the semiconductor in communication, measurement and control, medical, integrated optics and other technical fields of wide application, its attention is also increasing, for the design of a high precision, reliable performance, economic, durable driving power has become our current most urgent problem, because of the semiconductor laser "delicate" characteristics, the use of power must be in the performance and quality of strict control. Transfer characteristics of semiconductor lasersAt a certain temperature, wh

The control part of pulsed laser power supply mainly consists of signal source, signal processing and delay regulation, pulse power amplification, energy storage voltage control and other circuits. The main circuit structure of the pulsed laser power supply we developed adopts resonant switching technology, which can be closed when the current passes zero, effectively reducing the switching loss and improving the conversion efficiency.

Along with the continuous development of economy in our country, most areas begin to produce electric power equipment, which makes the national grid electric power output insufficient, coupled with the aging of the power output facilities, eventually causes the voltage at the end of the circuit to be too low, which brings great influence on the stability of laser output. The stable output of laser energy is a necessary condition for laser production.

Switch regulator based on LCbuck converters are much like barrel regulators, except that inductors replace resistors and a "new" diode is added. If we can understand the function of the diode, we can understand the basic principle of various power converters more clearly. This diode is called a clamp diode, a continuation diode, a commutator diode, or an output diode.

Technical Trends of Switching Power Supply AbroadSince the 1990s, the development of switching power supply has changed with each passing day. Many new fields and new requirements put forward newer and higher challenges to switching power supply. If we observe from the input and output window of a switching power supply, we can find that the input requirements have become more stringent, and products that do not meet the IEC1000-3-2 standard will be gradually eliminated; The output has derived many special application fields, and the difficulty of research and development has become greater.

Laser power supply is the energy of laser, it provides pumping energy to laser, control laser output strength and repetition frequency. Therefore, laser power supply is an essential part of laser. Its power and stability have direct influence on the corresponding performance of laser. The current output of a power box is designed according to the requirements of the pump module.