High power linear output high voltage stabilizing device and high power linear output high voltage stabilizing method

Abstract

The invention relates to a high power linear output high voltage stabilizing device and a high power linear output high voltage stabilizing method. The device comprises a chord wave generating circuit, a sine wave amplitude amplifier circuit, a prime power amplifier circuit, a push-pull power amplifier circuit, a boosting transformer, a high voltage rectifier filter circuit, a high voltage direct current (DC) output interface, a current sampling circuit and a voltage sampling circuit which are sequentially connected, wherein the current sampling circuit and the voltage sampling circuit are respectively connected with a micro-programmed control unit (MCU) and an over-voltage and over-current protection circuit; the device also comprises a voltage and current display connected with the MCU. The invention provides the high power linear output high voltage stabilizing device and the high power linear output high voltage stabilizing method which are high in stability and accuracy rate and realize high-power output.

Description

technical field [0001] The invention belongs to the field of electricity and relates to a high-power high-voltage stabilized power supply, in particular to a high-power linear output high-voltage device and method. Background technique [0002] In the field of photodetection and nuclear medicine with photomultiplier tubes, high-voltage regulated power supplies are usually used as energy excitation. The photomultiplier tube needs a highly stable high-voltage regulated power supply as an excitation to effectively realize photoelectric conversion. When the voltage fluctuates, the photomultiplier tube will also fluctuate, and the test results are inconsistent. In the field of nuclear medicine, high-power high-voltage power supplies are usually required to separate ions. However, due to the late start of domestic research in these two fields, the matching high-performance high-voltage regulated power supply can only rely on imports, and its key technologies are also in a state o...

AI Technical Summary

Problems solved by technology

[0004] Directly perform voltage doubler rectification on 220V mains to convert the mains to high-voltage DC. This kind of equipment cannot avoid the influence of mains fluctuations. Usually, the mains fluctuations are within ±10%, so its defect is that there is no voltage stabilization measure and the power output is stable. poor sex

In addition, the output current capability of the voltage doubling rectification method is only determined by the capacitance of the capacitor used in the voltage doubling link. Usually, the capacitance of a capacitor that can withstand a thousand volts of high voltage is less than 10μF, and the final output current capability is less than 1mA, and the output power is very limited.

[0005] The power of low-voltage pulsed AC signal is amplified, and the high-voltage DC signal is obtained by boosting and transforming, and then doubled and rectified. Although this method can control the input signal and avoid power fluctuations when the mains is directly used, this power supply is By using PWM to adjust the pulse width of the pulse signal to change the peak value of the output DC signal and stabilize the output voltage, it is a switch control method. The output ripple of the power supply is very large, and the load on the output terminal will be very large. Especially when using photomultiplier tubes for precision detection and research in the field of nuclear medicine, this ripple effect will seriously affect the accuracy of the test

Furthermore, its output current is determined by the current amplification capability of the power amplification link, the turns ratio of the transformer and the capacitance value of the capacitor used in the voltage doubler rectification link, and the output current capability is also very limited. 10mA maximum current capability at 2000V output

Especially in the medical field, high-voltage and high-power power supplies are often required, and the load capacity of this high-voltage regulated power supply will appear to be insufficient.

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