A DC high-voltage power supply control method and power supply device

Abstract

A DC high-voltage power supply control method and a power supply device. The present invention belongs to the technical field of power electronic control. It adopts an intelligent control chip (U1) as the core for control, supplies power to a pulse width modulation control chip TL594 (U2) through a power management chip MAX761 (U4), and uses a digital potentiometer chip DS1804 (U3 ) to adjust the output high voltage, and use step-up transformer circuit, voltage rectification filter circuit, voltage sampling circuit, and current sampling circuit to realize various state control of DC high voltage power supply circuit. The present invention has the ability to interface with the intelligent control chip, and can realize intelligent control and the intelligent and digital application of the instrument; the control of the DC high-voltage power supply device by using the intelligent control chip can include: stable high-voltage output, overvoltage protection state and overcurrent protection state , output one or more of the high-voltage regulation state, standby power-saving state, power-down power-saving state, and battery under-voltage protection state, and the energy conversion efficiency of the whole device is high.

Description

technical field [0001] The invention belongs to the technical field of power electronic control, and is a DC high-voltage power supply control method and a power supply device applied in the fields of field radioactive instrument technology and nuclear technology application in the field of resource and environmental exploration technology. Background technique [0002] In recent decades, the rapid development of computer technology and electronic technology, especially the continuous improvement of the performance of intelligent control chips and the continuous decline of prices, has led to the rapid development of radioactive instruments and technology, and is developing in the direction of intelligence and digitization. As radioactive instruments used in the field and outdoors, they are powered by batteries, so the power consumption of the instrument is a major research issue for modern instruments, and the DC high-voltage power supply device in the radioactive instrum...

AI Technical Summary

Problems solved by technology

As radioactive instruments used in the field and outdoors, they are powered by batteries, so the power consumption of the instrument is a major research issue for modern instruments, and the DC high-voltage power supply device in the radioactive instrument system is the main part of power consumption , and its performance greatly affects the performance of the instrument

The current high-voltage DC power supply device mainly has the following problems: 1. At present, the RC oscillator composed of gate circuits or LC oscillator composed of discrete components is used, the oscillation frequency is low, the transformer used is large in size, and the energy conversion efficiency of the entire device is low. Difficult to debug

2. The intelligent control chip cannot be used to output high and low levels to intelligently control the high-voltage power supply circuit. Therefore, after the instrument is turned on, the DC high-voltage power supply device is always in working condition, wasting a large part of energy. It is very unfavorable and greatly shortens the battery life

3 The output high voltage is greatly affected by the battery supply voltage and load changes, and the intelligent control chip cannot be used to control the voltage adjustment (regulation) of the circuit

4 Does not have high-voltage output over-current and over-voltage protection functions and battery under-voltage protection functions

5 Simple analog and digital circuits are used to form circuits, which do not have the ability to interface with intelligent control chips, and cannot realize intelligent and digital applications of intelligent control and instruments

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