High-frequency high-voltage switching power supply device for industrial X-ray flaw detector

Abstract

The invention discloses a high-frequency high-voltage switching power supply device for an industrial X-ray flaw detector. A control mode with a dual-high-frequency contravariant structure and amplitude adjusting as well as high-frequency lamp filaments is adopted, and a voltage controlled oscillator and drive circuits are used, so that a switching power supply can resist the interference of a power grid, and the stability of a DC (direct current) voltage is improved; the input of a voltage loop is controlled by adopting an amplitude adjusting mode, so that the voltage waveform of a voltage doubling circuit is more stable and is undistorted, and the circuit reliability is improved. The voltage is controlled by a dual-contravariant loop of AC (alternating current)-DC (direct current) and DC-AC, and a high-frequency full-bridge closed loop contravariant circuit is adopted for AC-DC, so that the output DC voltage is stable, and not influenced by the power grid, and finally stable direct current voltage is provided for a DC-AC closed loop circuit contravariant circuit. The input voltage of the whole device is adjusted through adjusting the output voltage of AC-DC, so that the device has the capability for resisting the oscillation of the power grid; a high-frequency dual-closed-loop lamp filament loop is adopted, and for the withstand voltage problem of a lamp filament transformer, a multi-stage transformer is adopted for coupling, so that the withstand voltage of each stage is reduced.

Description

technical field [0001] The invention relates to a switching power supply device, in particular to a high-frequency and high-voltage switching power supply device for an industrial X-ray flaw detector. Background technique [0002] In developed countries in Europe and the United States, traditional power frequency X-ray flaw detectors have been eliminated and replaced by X-ray flaw detectors with high-frequency and high-voltage power supplies with superior performance. The domestic market demand is also changing in this direction, but imported products are equipped with The high-frequency high-voltage power supply device is expensive, which restricts the expanded application of this type of flaw detector. [0003] At present, the circuit used in the high-frequency and high-voltage power supply device for this purpose is to first rectify the 220V AC power supply into a 310V DC power supply through a rectifier bridge circuit, and then send the DC power to the inverter circuit, ...

AI Technical Summary

Problems solved by technology

Due to the above-mentioned circuit structure, the generator has higher requirements on the power quality of the power grid where it is located, but the power factor of most domestic factory power grids is not high, which will cause the output of the high-voltage generator to be unstable and seriously affect the stability of the voltage output. , reducing the imaging quality of the X-ray tube and affecting the use of users

The output voltage of the high-frequency high-voltage switching power supply is finally added to the two ends of the X-ray tube, so that the X-ray tube generates X-rays. Different voltage values ​​​​will generate X-rays with different wavelengths. However, due to the large ripple of the voltage output, at the same time Generates X-rays of unwanted wavelengths that interfere with the clarity of imaging

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