Using SVPWM for Speed Control of Rotating Anode X-ray Tube Motor

Using SVPWM for Speed Control of Rotating Anode X-ray Tube Motor

This study analyzes the correlation between the anode target's surface heat in a rotating anode X-ray tube and the motor speed to develop a motor speed control strategy. Through ANSYS finite element thermal simulation, the research simulates the relationship between anode heat and motor speed and collects multiple datasets. These datasets are then utilized with the MATLAB curve fitting tool to generate a characteristic curve representing the connection between anode heat and motor speed. The study applies Space Vector Pulse Width Modulation (SVPWM) control technology to the frequency conversion and speed regulation of the anode motor in the rotating anode X-ray tube using a two-phase three-bridge inverter. This technology enables a wide speed regulation range while maintaining the high efficiency of the rotating anode X-ray tube anode motor. The accuracy and efficacy of the proposed control method are validated through PSIM simulation waveform analysis.