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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.

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.

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How to install laser engraving machineThe installation of laser engraving machine has the following three steps:1. Installation(1) Insert the control card into the microcomputer PCI slot, tighten the screws, and connect the data cable; Plug in the USB dongle and install the operating software and dongle driver.(2) Connect the laser tube water circulation tube with the anode and cathode conductor, and then put the laser tube clamp ring.

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.

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.

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

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.

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.