A method and device for detecting the rotational speed of a rotating anode bulb tube rotor

Abstract

The invention discloses a method and device for detecting the rotational speed of a rotating anode bulb tube rotor. The rotational speed detection method includes the following steps: S1: an MCU controller intermittently generates a SPWM control sequence through a control algorithm to drive a three-phase frequency converter to generate a corresponding AC output; S2: The three AC output terminals of the three-phase inverter are connected to the stator coil of the X-ray tube to drive the rotor of the X-ray tube to rotate; S3: Two AC output terminals of the three AC output terminals of the three-phase inverter The induced voltage is mutually induced to obtain the back electromotive voltage with the same frequency as the X-ray tube rotor. The present invention embeds a voltage sampling circuit in a three-phase frequency converter, obtains rotor speed information by means of an intervention method using reverse electromotive force, has the functions of accurate readings and real-time monitoring of the rotor speed, and solves the problem that the rotor speed of an X-ray tube is difficult to detect and The conventional mechanical synchronous vibration detection method cannot detect the rotor speed in real time and there are reading errors.

Description

Technical field [0001] The present invention relates to the field of anode tube rotor rotational speed detection, in particular, a rotary anode tube rotor speed detecting method and apparatus. Background technique [0002] The rotary male pool is a high-performance ball tube after a high-power X-ray machine, which uses a larger current in a small focus, and the X-ray generator is in various applications X-rays. Widely used in the device, for example, a device with X-rays to expose imaging, a very large impact in the medical imaging field. At present, the rotational speed of the rotary male pool rotor is above 3000 rpm, and the high-speed rotary male pole tube can reach 7200 rpm, and the ultra-high-speed ball tube can reach 10,000 rpm, and the tube anode rotor speed is According to the focus current density of the ball, the smaller the focus, the smaller the focus, the higher the speed of the rotor rotor rotor. However, the rotor rotor speed of the rotary anode X-ray tube is diffi...

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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