Study and Implementation of a 600 W Digital Server Power Supply

• Main Authors: Te-Hong Yang, 楊德鴻
• Other Authors: Yi-Hua Liu
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/58833892635445722301

碩士 === 國立臺灣科技大學 === 電機工程系 === 100 === The current thesis presents the design and implementation of a DSP-based server power. A boost converter is used as the front stage for active power factor correction and a phase-shift full-bridge converter with synchronous rectification is used as the DC-DC stage. The control methods used in the studied digital server power include average current mode control, voltage mode control, and synchronous rectifier control. Digital power supplies have the capability to implement complex control methods compared with conventional analog-control power supplies. It also has flexibility through programmability, higher reliability, and better noise and temperature immunity. Therefore, the current thesis proposes a digital PI (Proportional-Integral) controller as a feedback compensator, and analyzes the small-signal model. Finally, a digital signal processor Texas Instruments TMS320F28035 is applied to a 600 W prototype circuit of server power supply with input voltage of AC 90 V to 240 V, output voltage of 12 V, and output current of 50 A; PF>0.9; THD meets IEC 1000-3-2 Class D standard. These designed parameters of the controller are verified via software and hardware experiments.