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Question:

How do I calculate the output power and current as well as the voltage when designing the power supply?

How do I calculate the output power and current as well as the voltage when designing the power supply?

Answer:

Power design time:The output voltage should be in line with the voltage required by the power load and be able to achieve the rated voltage under rated load.The output current should be able to meet the demand of the power load and achieve the rated current not overheating for a long time.The output power should be slightly larger than the total power of the power equipment, leaving the 5--10% rich.
1 、 the output voltage is the basic parameter of the circuit, and it is unchangeable. For example, the common DC 5V power supply.2, the current is usually estimated, or first with a power supply to the circuit, using ammeter test. General current to leave margin, so that the rated operating current of the circuit is about 60% of the maximum power supply current.3 power is the product of voltage and current.
DC circuit: power = voltage x currentSingle phase AC circuit: (You Gong) power = voltage x current x power factorThree phase AC circuit: (You Gong) power, =1.732x voltage, X current, x power factor.

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