The Application Effect of AC Stabilized Voltage Power Supply
Initially, a compensated regulated power supply was developed using this control method. Its main idea was to perform negative feedback control on the grid voltage, with a stability of 0.1%, waveform distortion of 1%, and power of 100VA. Due to limitations in device selection at that time and issues such as the inability to keep up with the protection speed, this type of regulated power supply was not widely promoted and applied. Subsequently, instantaneous comparison and waveform repair techniques were used to optimize the original design scheme, device selection, and fast protection input circuit. After multiple improvements and experiments, an AC stabilized power supply with an output power of 300VA has been developed for the calibration of electric energy meters, which has practical functions. The actual measurement has achieved the following indicators:
When the input grid voltage changes+10%, use a digital Voltmeter to measure, the output voltage stability * large jump word does not exceed+0.03%/3min, and the output waveform distortion is<0.5%.
This stabilized power supply has the following characteristics:
(1) The circuit is entirely composed of analog devices, which have the characteristics of easy selection and low cost;
(2) The working principle of this power supply is to control high power with low power and high efficiency. You only need to create a 30 VA control power to achieve a power output of 300 VA;
(3) The output power tube does not require a combination tube. When the output power of the entire machine is 300VA, as only 30VA is needed to control the power, only one pair of high-power tubes can output it, and there is no need for air-cooled heat dissipation;
(4) Strong anti-interference ability. In the test, the three-phase electric welding operation is carried out on the same power supply line in the same room, and the output voltage does not jump;
(5) The stable voltage power supply independently produced by the assistant according to this design has the same technical specifications, indicating that the consistency of this design method is very good.
Conclusion:
Instantaneous Comparative law - waveform repair technology The basic principle of making a regulated power supply is to compare the sampling value of the input voltage with the reference voltage, find out the shortcomings of its waveform, and then improve and repair the input voltage waveform and stabilize the amplitude by changing the control voltage to achieve the purpose of output voltage stability. Its essence is to use a low-power control power supply to obtain a large capacity stable voltage output, which is a green, environmentally friendly, purification, and high-efficiency AC voltage stabilization method. The AC regulated power supply developed using this technology has the characteristics of low cost, high indicators, low cost, and easy control. It can also be expanded into high-power regulated power supply according to needs.
This voltage stabilizing method can provide * * AC voltage stabilizing power supply for scientific research, computer rooms, medical equipment, industrial automation equipment, communication equipment, lighting systems, audio and visual equipment, etc.
