As the name implies, an adjustable power supply refers to a power supply device that can flexibly adjust the output voltage and current. It is usually composed of a power transformer, a rectifier circuit, a filter circuit, and a voltage stabilization circuit. By adjusting the parameters of these circuits, the output voltage and current can be precisely controlled. In the research and development and experimental process of electronic equipment, adjustable power supplies play a vital role. It is widely used in electronic circuit testing, battery charging, LED lighting and other fields. So, how to adjust the current when the adjustable power supply is connected to the load? I hope that through this article, everyone can have some understanding of the relevant situation of the adjustable power supply.
How to adjust the current when the adjustable power supply is connected to the load
Use the current adjustment knob
Many adjustable power supplies are equipped with a current adjustment knob. By rotating the current adjustment knob, the output current of the power supply can be adjusted. It should be noted that the rotation direction of the current adjustment knob is different from that of the specific power supply. The user needs to combine the power supply manual or try to rotate to determine the adjustment direction.
When adjusting the current output, you need to first set the power supply voltage to the required voltage value, and then use the knob to adjust the current. It should be noted that some power supplies do not support direct adjustment from the minimum to the maximum value. They need to be adjusted slowly from small to large to avoid damage to the power supply due to over-adjustment.
Connecting a load resistor
When using a load resistor to connect an adjustable power supply, the current can be adjusted by adjusting the resistance value. The specific method is: first set the power supply output voltage to the required voltage value, and then adjust the current output by changing the resistance value of the load resistor.
It should be noted that the selection of the load resistor needs to meet the power supply specification requirements, otherwise the power supply may be damaged or malfunction.
Using a constant current circuit
Some adjustable power supplies are equipped with a constant current circuit, which can be used to adjust the current output. The specific method is: set the power supply output voltage to the required voltage value, turn on the constant current switch, and connect the required load at the set current.
It should be noted that the constant current circuit may cause a large voltage drop in the load, and the load needs to be properly adjusted in voltage.
In general, there are many methods for current regulation of adjustable power supplies, and users can choose the appropriate method for adjustment according to their own needs and power supply specifications. During use, you need to read the power supply manual carefully and follow the correct operating procedures to avoid damaging the power supply or affecting the use effect.
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