Adjustable regulated DC power supply has small size, good performance, high power, high stability and low noise. It is widely used in industrial and mining enterprises aging test, college chemical experiment, research institute test, new energy vehicle and automation equipment.
The adjustable constant voltage DC power supply is a high precision linear DC power supply with continuously adjustable voltage and current, automatic conversion of steady voltage and steady current. The DC output voltage can be linearly adjusted from 0V, and the output current can be set arbitrarily, with current limiting protection and short circuit protection.
When the adjustable regulated DC power supply works in the regulated state, the steady current part is the protection circuit. The regulated DC power supply works in the steady current state, and the voltage regulator part acts as a voltage limiting function, and the voltage regulation and the steady current mutual protection.
The flow of adjustable regulated DC power supply:
1. After the product is unpacked, check whether the whole is intact, and read the instruction manual carefully before powering on.
2. Connect the AC power supply without temporarily receiving any load.
3. Constant current use method: adjust the current knob to the minimum value before connecting the load, adjust the voltage to the user's specified value, then turn on the load, adjust the current knob clockwise, observe the current, reach the specified current limit value, and the output voltage will It varies with the size of the load. Note: Never use the voltage adjustment knob in the constant current state.
4, the use of constant pressure: First, the current knob is turned clockwise, when the adjustment voltage knob reaches the specified value, the voltage is a constant value.
Identification and detection of adjustable regulated DC power circuit components:
The adjustable and regulated DC power supply circuit is composed of components such as a resistor, a potentiometer, a capacitor, an LED, a voltage regulator integrated chip, and a transformer.
(1) Resistance, this circuit uses two color ring resistors. The five color rings on the 220Ω resistor are red, black and black, and the five color rings on the 10KΩ resistor are brown, black, red and brown.
(2) There are polar capacitors, and there are common electrolytic capacitors. The electrolytic capacitor pins have positive and negative points and cannot be reversed. The length of the pin is positive and the short is negative; next to a white one is negative and the other pin is positive.
(3) Non-polar capacitors, common with ceramic capacitors.
(4) Rectifier diodes, the pins of which have positive and negative points, which are generally marked with a negative white strip, and the other side is a positive pole.
(5) Switching diodes, the pins of which have positive and negative points, generally marked with a negative black strip, and the other side is a positive pole.
(6) Light-emitting diodes, the pins of which have positive and negative points, generally long positive and short short. It can also be seen from the inside that the contact surface is small and the contact surface is large. The outside has a negative for the incision and the other side is positive.
(7) The potentiometer is a kind of adjustable resistor. It is usually composed of a resistor body and a rotating or sliding system, that is, a moving contact moves on the resistor body to obtain a partial voltage output.
The resistor body of the potentiometer has two fixed ends. By manually adjusting the rotating shaft or the slider and changing the position of the movable contact on the resistor body, the resistance value between the movable contact and any fixed end is changed, thereby changing The magnitude of the voltage and current.
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