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Source of electrical noiseNoise is generated when there is a rapid jump in the voltage or current waveform. In a switching power supply, many waveforms are periodic, that is, pulses containing high frequency edges repeat at a predictable pulse repetition rate (PRF). For a rectangular pulse train, the reciprocal of the period determines the fundamental frequency of the waveform. The Fourier transform of a rectangular wave contains a large number of harmonics at the fundamental frequency.

What are the differences between the QCW, CW and PW working modes of laser source?Laser source is a device that transfers energy from an active medium to an output beam. The working mode of the laser source has an important impact on the performance and application of the laser source. In the operation of laser source, QCW (pulse modulation width), CW (continuous wave) and PW (pulse wave) are common operating modes.

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.

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.

Distinguish different cosmetic optical instruments and their functionsThere are many different optical instruments on the market, which give off different frequency and characteristics of the radiation wave. We can basically tell by its wavelength, energy, output mode, etc.Ultraviolet lightUltraviolet light can be divided into ultraviolet A, ultraviolet B and ultraviolet C according to different wavelengths. Uv A has a wavelength between 315-400 nm.

How to use high voltage power supply to detect high voltage cablesTo ensure the normal and safe use of high-voltage cables, check the cable inlet before or after using them for a period of time. The test includes determining whether the main insulation is damp or aging, and checking whether there are defects in the main insulation of the cable after the voltage test. High voltage power supply is the main tool used for voltage resistance and insulation detection of cable.The source of Radium specially produced a power supply type for the high voltage test of power supply :HY-12KV and HY-32KV.

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.

Laser power supply technician is an important member of the operation of equipment, but in the operation of laser power supply, will also encounter a variety of difficult problems, today our factory technicians summed up the following problems, and according to the problem one by one to solve the problem, these problems are very key, I hope to pay attention to.▲ Power failure: Because the laser power supply system, especially the high-power laser power supply system needs a lot of voltage, the power supply related problems will produce inconsistent output power, leading to catastrophic damage.

Power supply circuit analysis of pulsed semiconductor laserPulsed semiconductor lasers have the advantages of high peak power and small size, and are widely used in the fields of laser ranging, lidar and free space laser communication.

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.