Rotating speed detecting method and device for bulb rotor of rotary anode

Abstract

The invention discloses a rotating speed detecting method and device for a bulb rotor of a rotary anode. The method comprises the following steps that S1, an MCU controller intermittently generates anSPWM control sequence through a control algorithm so as to drive a three-phase frequency converter to generate corresponding AC output; S2, three alternating-current output ends of the three-phase frequency converter are connected to an X-ray bulb stator coil so as to drive the X-ray bulb rotor to rotate; and S3, induction voltage is mutually induced from two of the three AC output ends of the three-phase frequency converter so as to acquire a reverse electromotive force voltage with the same frequency as the X-ray bulb rotor. According to the invention, a voltage sampling circuit is embedded into the three-phase frequency converter, rotating speed information of the rotor is obtained through reverse electromotive force in an intervention mode and is read accurately and monitored in realtime, and the problems that the rotating speed of the X-ray bulb rotor is difficult to detect and cannot be detected in real time through a conventional mechanical synchronous vibration detection means, and that reading errors exist are solved.

Description

technical field [0001] The invention relates to the technical field of detecting the rotational speed of an anode bulb tube rotor, in particular to a method and a device for detecting the rotational speed of a rotating anode bulb tube rotor. Background technique [0002] The rotating anode tube is a high-performance tube after the emergence of high-power X-ray machines. This tube can work with a larger current in a small focus. X-ray generators are used in various applications of X-ray It is widely used in devices, for example, devices that use X-rays to expose images, and have a very large impact in the field of medical imaging. At present, the rotating speed of the rotating anode tube rotor is above 3000 rpm, the high-speed rotating anode tube can reach 7200 rpm, and the ultra-high-speed tube can reach above 10,000 rpm. The tube anode rotor speed is It is designed according to the focus current density of the tube. For the same current tube, the smaller the focus, the hig...

AI Technical Summary

Problems solved by technology

However, it is difficult to detect the rotor speed of the rotating anode X-ray tube. The conventional mechanical synchronous vibration detection method cannot detect the rotor speed in real time and there is a problem of reading error.

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