Adjustable DC power supply has different nicknames for different applications, such as maintenance power supply, experimental power supply, universal power supply, adjustable voltage-stabilized power supply, etc. As the name implies, the main function of adjustable DC power supply is to convert AC mains power into DC power supply (mostly using low-voltage DC power supply) and provide a constant voltage DC voltage source.
Usually in product design, the setting can be adjusted within the range according to the needs. The adjustable power supply can provide any voltage output within the design range, which can replace the power adapter and power supply circuit used in many electronic products, and is called "universal power supply".
In electronic experiments, in addition to being used as a voltage source for various voltages, adjustable DC power supply often uses the adjustable voltage characteristics to adjust the circuit under different working conditions to test the withstand voltage range and actual current consumption of the input voltage. It can also be called an experimental power supply.
1. Voltage adjustable power supply
Adjustable power supply refers to a power supply that can achieve precise and stable power output by adjusting the voltage and current output of the circuit or device. Its main function is to provide constant and stable power output for various electronic equipment or experiments to ensure the normal operation of the equipment or experiment. Adjustable power supplies are widely used in scientific research, teaching, electronic engineering, communications, computers and other fields.
The advantages and characteristics of adjustable power supplies include:
1. High precision: The adjustable power supply can control the output voltage and current by precisely controlling the circuit and components, with high precision and small error.
2. Good stability: The adjustable power supply adopts stable circuits and devices, which can achieve stable output voltage and current, and is not subject to fluctuations caused by external environmental interference.
3. Wide adaptability: The adjustable power supply is suitable for a variety of electronic equipment and experiments, with a large adjustable range, which can meet different work needs.
4. Easy to operate and adjust: The adjustable power supply has a simple operation method, and the voltage and current can be adjusted as needed, which is convenient and practical.
5. High reliability: The adjustable power supply adopts stable circuits and devices, has high reliability and stability, and is not prone to failure during long-term operation.
Precautions for the use of adjustable power supplies include:
1. It should be used strictly in accordance with the rated output voltage and current of the power supply to avoid overload and short circuit to avoid damage to the equipment and the power supply itself.
2. Before use, you need to read the instructions and user manual carefully to understand the characteristics and usage of the power supply to ensure correct and safe use.
3. The power supply should be regularly maintained and serviced to extend its service life and stability.
2. What is the principle of adjustable voltage power supply
Voltage regulation is the process of controlling the output voltage of the power supply to maintain it within the required stable value range. The main principles of voltage regulation include:
1. Feedback control principle
The feedback control principle is one of the core principles of voltage regulation. It is based on the actual value of the output voltage detected by the sensor and compared with the set value. According to the comparison result, the control loop adjusts the size of the power supply voltage so that the output voltage is as close to the set value as possible. This negative feedback control can achieve precise regulation and stability of the voltage.
2. Voltage regulator principle
The voltage regulator is one of the key components of voltage regulation. It is usually composed of a variable impedance device that adjusts the output voltage of the power supply by changing the impedance of the circuit. The voltage regulator can increase or decrease the resistance according to demand to maintain a stable output voltage.
3. Transformer principle
The transformer is a commonly used voltage regulation device in power systems. It is based on the principle of electromagnetic induction and achieves voltage increase or decrease by changing the ratio of the number of turns of the coil between the input and output sides. The transformer can provide a relatively large voltage regulation range and has high efficiency and stability.
3. What are the ways to adjust the voltage of adjustable voltage power supply?
In practical applications, there are many ways to achieve voltage regulation. Here are some common voltage regulation methods:
1. Automatic voltage regulator (AVR)
Automatic voltage regulator is a commonly used voltage regulation device. It uses the principle of feedback control to monitor the output voltage and adjust the excitation current to achieve a stable output voltage. AVR is suitable for scenarios that require precise voltage control, such as generator sets, UPS power supplies, etc.
2. Open-loop voltage regulation
Open-loop voltage regulation is a simple voltage regulation method that does not involve feedback control. In this way, voltage regulation is achieved by changing the input voltage of the power supply or the impedance of the load. Open-loop voltage regulation is suitable for some applications that do not require high voltage, such as lighting, some low-power devices, etc.
3. PWM modulation
PWM (pulse width modulation) is a common voltage regulation technology. It adjusts the average value of the output voltage by controlling the on-time and off-time ratio of the switching device. PWM modulation can provide high-efficiency and precise voltage regulation and is widely used in systems such as DC-DC converters and AC-DC converters.
The above is what IDEALPLUSING wants to share with you this time about adjustable voltage power supply. If you are satisfied with the content of this article, you may wish to continue to pay attention to our website.
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