Causes of power supply burning in mining machine
The common reasons are as follows:
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the voltage is too high
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the power supply is insufficient
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the startup time is too long and the heat dissipation is poor
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modifying computer configuration or overclocking results in overload
2. When the voltage is unstable, especially when the voltage is too high, this phenomenon is rare in brand power supply, because high-quality brand power supply has a wide range of applicable power supply voltage. Poor quality power is easy to burn
3. The rated output power of the power supply is insufficient and the load is too heavy. The element is damaged e to serious heating
4. The power supply is of inferior quality, the quality of components is poor, the power is false, and the burn out rate is very high
5. Bugs enter the power supply to build a nest, causing short circuit and burning components
6. If the power plug and socket are in poor contact, the peak pulse current will instantly break down the weak components with low withstand voltage.
The working process of the power mole is very special. The working sequence and voltage rise are divided into three stages. Stage 1 is 380V AC rectification to 400VDC. Stage 2 is to continue to charge the DC-link capacitor to 570vdc after 400VDC is detected. Stage 3 is to wait for the pulse enable signal to appear and increase the DC-link voltage to 600vdc. As the signals of start-up, drive enable and pulse enable are provided at the same time, the time interval of the above three steps is very short, and the IGBT rectifier bridge starts to work as soon as the enabling conditions are met. When the IGBT rectifier bridge and pulse distribution circuit suffer from large current breakdown or pulse disorder e to unstable voltage, humidity, st accumulation and other reasons, The surge current impacts the DC side of IGBT through DC bus, which is the root cause of short circuit and burnout of power supply mole. When the IGBT rectifier bridge is short circuited, the incoming reactor should play a certain role in preventing the current from rising too fast. The decrease of insulation capacity leads to the sharp decrease of inctance, which can not effectively play a protective role. This is also the secondary reason for the power mole burning
The normal supply range of voltage in China is 380 (1-15%) V -- 380 (1 + 10%) V AC. The voltage requirement of Siemens power mole is: 380 ± When the power supply exceeds the voltage required by Siemens, the self-protection function (fuse) of the power supply mole will be lost, and the fuse and three associated electrical components will be broken down, resulting in the power supply mole burningthe power mole is a power supply that can be directly mounted on the printed circuit board. It can supply power for application specific integrated circuit (ASIC), digital signal processor (DSP), microprocessor, memory, field programmable gate array (FPGA) and other digital or analog loads. Generally speaking, this kind of mole is called point of load (POL) power supply system or point of use power supply system (pups). Due to many advantages of molar structure, molar power supply is widely used in switching equipment, access equipment, mobile communication, microwave communication, optical transmission, router and other communication fields, as well as automotive electronics, aerospace and so on
1. How about the power supply of your home? Is it stable? Is it always at high voltage
2. What brand is your bad power supply? Is the quality guaranteed? Is the power sufficient
for the first question, you can find a multimeter to measure the power supply, or find someone to measure it to confirm whether the power supply voltage is in the normal range and stable. Instability and high voltage are not good for the power supply. Long time working in unstable or high voltage will naturally cause power failure
for the second problem, it depends on whether there is a quality problem in your power supply itself and whether the power is insufficient. If the quality of the power supply itself is not up to standard, or the power can not meet the requirements of the system, it will cause damage to the power supply, or damage the motherboard and other devices
as for the noise you mentioned, if it is a new power supply, it should be the rotating noise of the cooling fan inside the power supply. The problems caused by the above two situations are not obvious.
1. The main reasons for this problem are whether the 300V voltage after rectification and filtering is normal and stable, feedback oscillation circuit elements, (switch transformers are not excluded), sampling circuit elements, etc
2. Whether there are short circuit elements in the load circuit, which can damage the switch tubes inside the thick die chip of switching power supply.
→ short circuit will burn the power supply
3. The family voltage is too high, and the fuse will burn out
maintenance method: 1. Keep the computer working environment dry
2. Keep the computer working environment clean; 3. Replace the fuse with higher rated voltage