Q:How to choose a regulated power supply

Buy the power supply is the most important thing to figure out how much load power, load nature is what. General non-inductive load in accordance with 1.2-1.5 times to match, that is 10KW equipment with 12-15KVA on it. Inductive load in accordance with 2-3 times to match! If the response time, the waveform has special requirements on the need to use precision purification regulator or non-contact regulator

Q:What is the solution for a regulated power supply?

AC power supply voltage fluctuations in the main situation of the following two points: (1), the voltage fluctuated, can not be stabilized within the scope of the standard voltage permit; (2), the voltage continues to be high or low. The above two cases for the safety of electricity and electrical safety are a lot of unfavorable factors. With long-term work in such a voltage environment will cause air consumption increases, increased current consumption, reactive power is high, a serious rise in temperature, electrical appliances can not work properly and so on. More serious will burn the electrical, and even cause a fire!

Q:DC power supply is linear or switch

DC power supply with a linear power supply, but also switching power supply.

Q:Why study DC power supply circuit

Power supply is almost all electrical equipment must be, and most of the electrical equipment are used DC power supply. For example, most small-scale digital chips (74 series) use +5 volts DC power supply, and requires the power value between + 4.5 ~ +5.5 volts, if the supply voltage beyond this range, the digital chip logic will be abnormal, This is because the internal circuit of these chips is designed to determine the bias voltage is based on the above-mentioned power supply range; and, for example, the use of analog op amps, the reason is the same, of course, op amp power supply to a little wider. Imagine if the amplitude of an analog signal needs to be amplified to + -6 volts, and if the power supply of the op amp that processes the signal changes below +6 volts or greater than -6 volts, how can it be guaranteed The amplitude of the processed signal is +6 volts to -6 volts?

Q:I would like to ask: DC power supply when the ground terminal when used? how to use?

Question 1: If the power supply is three-core, the terminal can be connected to the buried pillars above, if there is no copper pillars, vacant Question 2: I have not used two of the two. If it is connected, personally think that one can be. Specifically you can confirm whether the two terminals are directly connected, and the equipment manual recommended connection.

Q:Switching power supply with load capacity difference is what reason. My switching power supply output is 2A-24v. The output is not connected to the output is 24v. Connected to the 24v -5w lamp only 2v voltage. Even the switch power indicator light is not bright. What 's the matter?

The biggest possibility is that the output capacitor is bad, deteriorated. As the switching power supply for a long time to work fever, so that the capacitor electrolyte dry, so the capacity decline, ESR (equivalent resistance) rise, simply say that its filter capacity decreased, so it can not be properly loaded, the use of low ESR specifications After the capacitor can be replaced. But must be low ESR, otherwise the switching power supply because of high frequency, high ESR of the ordinary capacitor may be due to serious fever burst.

Q:Can DC power supply be used as a charger for lithium batteries?

Plus a current limiting resistor can be. Lithium battery to bring a protective plate, will automatically turn off after charging.

Q:In daily life, sometimes voltage, unstable, want to buy a regulator, do not know what to buy, I would like to ask the next regulator power supply and regulator What is the difference between them, what are their own use The If possible, explain as much as possible.

The voltage of the power adapter in the case of no load is higher, if you pick up the load will find its voltage will come down, it is due to its own role is limited, just to provide a suitable voltage to the load , And the main role of the regulator is the regulator, it will be through its voltage stability in a certain range, more or less than this value it has action, the power adapter will not have this effect. These two can be distinguished according to the use of the situation, if it is in the load power requirements are not high places can be used with each other, but if the load on the power requirements are relatively high, even if the 1V voltage changes are not OK, then you must use the regulator , Otherwise do not burn the load also burn power.

Q:The main reason for the instability of the output voltage of the regulated power supply (only about thirty words is briefly summarized)

1, the grid input voltage instability 2, the load changes formed 3, the regulator itself to promote the conditions 4, components due to temperature, humidity and other environmental impact And change its performance

Q:Switching power supply and ordinary power supply compared to what advantages

Switching power supply efficiency is high, heat loss low!