Development of AC regulated power supply by instantaneous comparison method with conventional regulated power supply
(1) Fast response speed. Due to the use of high-speed linear electronic devices, instantaneous sampling, instantaneous implementation, control response speed is extremely fast, milliseconds below the level of adjustment can be completed, so that the output voltage quickly return to the rated voltage near. Therefore, for high-frequency interference and noise suppression, millisecond interference has a purifying effect, which is the general regulated power supply can not do.
(2) Wide input voltage range. Input voltage changes up to 30% to 50% or more, and can be adjusted symmetrically, the wider the range to provide more repair energy. How much control voltage value is mainly by the demand, from the economic and practical point of view, take (8 ~ 10)% is appropriate.
(3) High accuracy of voltage regulation. With the different ways of generating reference voltage, the effect of voltage regulation can reach 1%, 0.1%, 0.01%. Different accuracy of voltage regulation, applicable to different requirements of the occasion. 1% for general voltage regulation requirements of the occasion; 0.1% for the laboratory or important industrial equipment; 0.01% can be used for instrument calibration.
(4) With green power features. The method firstly corrects the waveform of the grid voltage, corrects it into a good sinusoidal waveform, and then supplies power to the load, and the amount of repair energy is decided by the need. Since the essence of the method is the correction of the grid waveform, the distortion of the corrected waveform is generally less than 1% ~ 0.5%, so the method of voltage regulation is green.
(5) It has a certain environmental nature. If the input voltage is unchanged, due to the different nature of the load caused by the output voltage changes, in a certain harmonic range using the corresponding change in the control voltage to make the output voltage unchanged. Because the control voltage has the isolation effect, it can't affect the input voltage, therefore, the regulator method has a certain environmental protection.
(6) High working efficiency. The working principle of this power supply is that small power controls large power, which has high efficiency. The capacity of the output voltage 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 it only needs to consume the power used to manufacture the control power supply, so the efficiency is very high.
(7) does not use large inductors, large capacitors and other low-frequency filter parts, small size, light weight, good output waveforms, general waveform distortion at 1% to 0.5%.
(8) This regulator can be cascaded with other regulators, the narrower the range of stability and accuracy in use, the smaller the energy consumption. Such as the former regulator stability accuracy of 2%, if you need to output 5000 VA of power, you only need to make 100 VA of control power, stability can reach more than 0.1%.
(9) Fast protection circuit can be used. When the load side of the instantaneous short-circuit fault, the control power supply immediately quit working. At this time, the coupling transformer is equivalent to a reactor (coupling transformer is introduced into the control power supply transformer), with the role of limiting the growth of short-circuit current, the fault is eliminated, the control power supply to resume work by itself.
