What is the principle of voltage adjustable power supply, and what are the voltage adjustment methods?

What is a voltage-adjustable power supply? What is the principle of voltage adjustable power supply?
The voltage adjustable power supply is based on the regulated switching power supply to increase the voltage, so that the output voltage can be adjustable in a large range (generally 0 V ~ A type of power supply. It consists of the voltage reference source, adjustment tube, error amplification, voltage sampling, and current sampling. The voltage adjustable power supply generally uses the change of the partial pressure ratio of the sampling circuit to adjust the output voltage.

What are the adjustment methods for the output voltage of the voltage adjustable power supply?
Generally, there are three Voltage Adjustment Methods: Hand-rotating potentiometer, external multi-ring potentiometer, and analog signal control.
1. Hand-rotating Potentiometer
At the right of the output end of the voltage adjustable power supply, there is a blue potentiometer, such as (below ). Generally, the output voltage can be adjusted by using a screw driver to adjust the output voltage gradually in a clockwise direction.

2. External multi-ring Potentiometer
As shown in, when you contact a multi-ring potentiometer at the Blue potentiometer, you can directly adjust the output voltage by hand. Compared with the hand-turned potentiometer, the operation is more convenient.

3. Analog Signal Control
Analog Signal Control generally refers to 0-5 V or 0-10 V analog signals. For example, after the Huayao 0-12 V voltage adjustable power source is switched to a 0-5 V analog signal, the signal control relationship is as follows: 1 V of the analog signal corresponding to the control power supply outputs 2.4 v, the corresponding control power output of the analog signal 3 V is 7.2 v.

Where can a voltage adjustable power supply be used?
The voltage adjustable power supply is characterized by the continuous adjustable output voltage. Therefore, it has obvious advantages in applications that require constant voltage adjustment. Such as product testing equipment, product aging testing, motor speed control, led dimming, punch, solenoid valve, magnetic particle clutch, laser equipment, etc.

What is the principle of voltage adjustable power supply, and what are the voltage adjustment methods?