A dual-mode phase-shift modulation control scheme for voltage multiplier based X-ray power supply

作者：Iqbal S^*; Besar R; Venkataseshaiah C

来源：Journal of Instrumentation, 2010, 5: T05001.

DOI：10.1088/1748-0221/5/05/T05001

• Analogue electronic circuits
• X-ray radiography and digital radiography ( DR)

This paper proposes a dual-mode phase-shift modulation control scheme for series resonant inverter fed voltage multiplier (VM) based X-ray power supply. In this control scheme the outputs voltage of two parallel connected series resonant inverters are mixed before supplying to VM circuit. The output voltage of the power supply is controlled by varying the phase-shift between the output voltages of two inverters. In order to achieve quick rise of output voltage, the power supply is started with zero phase-shift and as the output voltage reaches 90% of the target voltage, the phase-shift is increased to a value which corresponds to target output voltage to prevent overshoot. The proposed control scheme has been shown to have good performance. Experimental results based on the scaled-down laboratory prototype are presented to validate the effectiveness of proposed dual-mode phase shift modulation control scheme.

• 出版日期2010-5