Advantages of high-power DC power supply:
We, idealplusing, are mainly Chinese manufacturers that produce adjustable power supplies, high-power power supplies, inverters, frequency converters and DC converters. Our company's high-power DC power supplies are also popular all over the world. So what are the advantages of high-power DC power supplies? The input of high-power DC power supplies is mostly AC power (such as mains) or DC power, and the output is mostly equipment that requires DC power, such as personal computers, and high-power DC power supplies perform voltage and current conversion between the two.
High-power DC power supplies are different from linear power supplies. The switching transistors used in high-power DC power supplies mostly switch between full-on mode (saturation zone) and full-off mode (cut-off zone). Both modes have the characteristics of low dissipation. The conversion between switching will have higher dissipation, but the time is very short, so it is more energy-saving and generates less waste heat. Ideally, high-power DC power supplies themselves do not consume electrical energy. Voltage regulation is achieved by adjusting the time when the transistor is turned on and off. On the contrary, when a linear power supply generates an output voltage, the transistor works in the amplification area, and it also consumes power.
The high conversion efficiency of a High-quality adjustable DC power supplies is a big advantage, because the operating frequency of a High-quality adjustable DC power supplies can reach a relatively high level, and a small-sized and light-weight transformer can be used. Therefore, a adjustable DC Power Supply will be smaller in size and lighter in weight than a linear power supply.
If the high efficiency, volume and weight of the power supply are the key considerations, a high-power DC power supply is better than a linear power supply. However, a high-power DC power supply is more complex, and the internal transistors will switch frequently. If the switching current is not processed, noise and electromagnetic interference may be generated to affect other devices, and if the high-power DC power supply is not specially designed, its power factor may not be high.
Components
The high-power DC power supply is roughly composed of four major parts: the main circuit, the control circuit, the detection circuit, and the auxiliary power supply.
1 Main circuit
Inrush current limiter: limit the inrush current on the input side when the power is turned on.
Input filter: its function is to filter the noise in the power grid and prevent the noise generated by the machine from being fed back to the power grid.
Rectification and filtering: directly rectify the AC power of the power grid into a smoother DC power.
Inversion: Convert rectified DC power into high-frequency AC power, which is the core part of high-frequency high-power DC power supply.
Output rectification and filtering: Provide stable and reliable DC power supply according to load requirements
2 Control circuit
On the one hand, sample from the output end, compare with the set value, and then control the inverter to change its pulse width or pulse frequency to stabilize the output. On the other hand, according to the data provided by the test circuit, after identification by the protection circuit, provide the control circuit with various protection measures for the power supply.
3 Detection circuit
Provide various parameters and instrument data in operation in the protection circuit.
4 Auxiliary power supply
Realize software (remote) start of the power supply to provide power for the protection circuit and control circuit (PWM and other chips).
Development trend
At present, our engineers are developing related power electronic devices and switching frequency conversion technology in the field of High Voltage Multi-Range DC Power Supply technology. The two promote each other and promote the high-power DC power supply to develop in the direction of light, small, thin, low noise, high reliability and anti-interference at an annual growth rate of more than two digits. High-power DC power supply can be divided into two categories: AC/DC and DC/DC.
High-power DC power supply is becoming popular and miniaturized. High-power DC power supplies will gradually replace all applications of transformers in life. The application of low-power micro-high-power DC power supplies will first be reflected in digital display meters, smart meters, mobile phone chargers, etc. At this stage, the country is vigorously promoting the construction of smart grids, and the requirements for electric energy meters have been greatly increased. High-power DC power supplies will gradually replace transformers in electric energy meters.
