Evaluation and Improvement of High Voltage Module (HVM) of X-ray Generator – Year two

The motivation for this research comes from an overall need to improve the performance of high voltage module (HVM) and to reduce the size and its material costs while maintaining its efficient performance, with no partial discharge, arc or thermal issues. In particular, stable transient and steady state performances must be achieved for medical X-generators under wide load variation, ranging from 40-150 kV output voltage and 0.1-1000 mA output current to obtain defect free images. The desired HV module will combine the optimum cost-effective design with compactness. Therefore, the design must consider eliminating any high electric field and high temperature points in the system that lead to partial discharge and failures. Another concern about the module is its behavior under severe transient load conditions, which can happen when there is an arc in the X-ray tube. Understanding the induced voltage from the field in such a scenario is necessary to improve the design of the module. Additionally, uneven voltage distribution along the diode chains in the voltage multiplier will be a concern due to the parasitic capacitances under high frequency and high voltage conditions. Therefore, the proposed work will address the design improvements of the HVM of X-ray generators.

Faculty Supervisor:

Sheshakamal Jayaram

Student:

Alireza Naeini

Partner:

Communications and Power Industries Canada Inc

Discipline:

Engineering - computer / electrical

Sector:

Manufacturing

University:

University of Waterloo