Control method and control circuit of rotary anode X-ray tube

Abstract

The invention relates to a control method applied to a rotary anode X-ray tube with an alternating current motor. The control method comprises the following steps: a) before the exposure of the rotary anode X-ray tube, switching on a power supply of the alternating current motor for a certain time Ts; and after the certain time Ts is passed, enabling the alternating current motor to operate at a rated rotation speed; b) switching off the power supply of the alternating current motor; and maintaining the switched-off state for Toff seconds, wherein Toff is not less than 1 and not more than 5; c) switching on the power supply of the alternating current motor; and maintaining the switched-on state for Ton seconds, wherein Ton is not less than 0.4 and not more than 4 and the Ton is less than the Toff; and d) circulating the process from the step b) to the step c) in sequence until the working of the rotary anode X-ray tube needs to be stopped. According to the invention, the energy consumption of the rotary anode X-ray tube can be reduced and the efficiency of the rotary anode X-ray tube can be increased.

Description

【Technical field】 [0001] The invention relates to a control method for a sun-rotating X-ray tube, in particular to a method for controlling the operation of an AC motor of the sun-rotating X-ray tube; in addition, it relates to a control circuit. 【Background technique】 [0002] X-ray tubes are components that generate X-rays and are widely used in industrial testing equipment and medical testing equipment (such as food inspection X-ray machines, medical X-ray machines, etc.). [0003] Such as figure 1 As shown, a basic structure of an X-ray tube with a fixed anode specifically includes: a vacuum tube 1 made of glass, one end of the vacuum tube 1 is fixedly equipped with an anode target 4 made of tungsten metal (the anode target 4 is sealed into the vacuum tube 1. One part is inside the vacuum tube 1, and the other part is outside the vacuum tube 1. Therefore, the anode target 4 is in contact with the glass bulb of the vacuum tube 1), and the other end is equipped with a cat...

AI Technical Summary

Problems solved by technology

[0007] When the AC motor is powered on for a long time, the induced current on the rotor forms an eddy current, which is converted into heat energy on the rotor to increase the temperature of the rotor, and at the same time, the rotor transfers heat to the anode target 12, resulting in an increase in the temperature of the anode target 12, thereby reducing the temperature of the anode target 12. The X-ray output rate of the Xuanyang X-ray tube, and the AC motor has been consuming electricity when it is running

In addition, once the temperature rise of the X-ray tube exceeds the thermal limit, the temperature control switch of the X-ray tube will be disconnected immediately, and the X-ray tube will stop working, which limits the working mode and working time of the X-ray tube, making it unable to fully utilize Efficiency, and the target surface temperature is too high will reduce the service life of the X-ray tube

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