Comparison between AC regulated power supply and conventional regulated power supply
(1) Fast response speed. Due to the use of high-speed linear electronic devices, instantaneous sampling and execution, the control response speed is extremely fast, and adjustments can be completed below millisecond level, enabling the output voltage to quickly return to the rated voltage. Therefore, it can restrain high-frequency interference and noise, and Catharsis millisecond level interference, which is impossible for normal regulated power supply.
(2) The input voltage has a wide range of applications. The input voltage variation can reach 30%~50% or even more, and can be symmetrically adjusted. The wider the range, the more repair energy needs to be provided. The value of control voltage is mainly determined by demand, and from an economic and practical perspective, it is advisable to take (8-10)%.
(3) High voltage stabilization accuracy. Depending on the generation method of the reference voltage, the voltage stabilization effect can reach 1%, 0.1%, and 0.01%. Different precision voltage stabilization is suitable for different occasions with different requirements. 1% for general voltage stabilization requirements; 0.1% for laboratory or important industrial equipment; 0.01% can be used for instrument calibration.
(4) Featuring green power supply. This method first analyzes the waveform of the power grid voltage
Line correction, correct to a good sine wave, and then supply power to the load. The amount of repair energy is determined by the needs. Due to the fact that the essence of this method is to correct the waveform of the power grid, the distortion of the corrected waveform is generally less than 1%~0.5%. Therefore, this voltage stabilization method is green.
(5) It has certain environmental protection properties. If the input voltage remains unchanged and the output voltage changes due to different load properties, the corresponding changes in the control voltage are used within a certain harmonic range to keep the output voltage unchanged. Due to the isolation effect of the control voltage, it does not affect the input voltage. Therefore, this voltage stabilization method has a certain degree of environmental friendliness.
(6) High work efficiency. The working principle of this power supply is to control high power with low power and high efficiency. The output voltage capacity is mainly taken from the power grid, and the control voltage is generally the part of the grid voltage that deviates from the rated voltage, so only the power of the manufacturing control power supply needs to be consumed, resulting in extremely high efficiency.
Taking a 300 VA output power supply as an example: if the grid voltage fluctuates by+10%, only the+10% power fluctuation needs to be controlled. If the efficiency of manufacturing the control power supply is 30%, the consumption power of the control power supply needs to be 100 VA, and the overall efficiency is 300/(300+100)=75%. And the higher the efficiency of the production control power supply method, the higher the working efficiency of the entire machine.
Taking the use of inverter as an example: to produce a 0.01% high stability power supply, due to the limitations of AC/DC, DC/AC conversion and power amplifier device efficiency, the overall efficiency is below 30% without considering other losses. However, when using the instantaneous Comparative law method to make a regulated power supply with the same power, only the power of the control power supply used to repair 10% of the fluctuation needs to be made. Even if the control power supply is also made in the inverter mode, then the power consumed is only 1/10 of the inverter mode. It is obvious that the efficiency of the instantaneous Comparative law method is much higher than that of the inverter method when making a high stability regulated power supply.
(7) Without the use of low-frequency filtering devices such as large inductors and capacitors, it has small size, light weight, and good output waveform, with a general waveform distortion of 1%~0.5%.
(8) This type of voltage regulator can be cascaded with other voltage regulators, and the narrower the stability accuracy range setting during use, the smaller the energy consumption. If the stability accuracy of the front stage voltage regulator is 2%, and a power output of 5000 VA is required, only a 100 VA control power supply needs to be manufactured, and the stability can reach over 0.1%.
(9) Fast protection circuits can be used. When there is an instantaneous short circuit fault at the load end, the control power supply immediately exits operation. At this point, the coupling transformer is equivalent to a reactor (the coupling transformer is the transformer that introduces the control power supply), which has the function of limiting the growth of short-circuit current. After the fault is eliminated, the control power supply resumes operation on its own.
