Realization Study of Distributed Server Power Supply

• Main Authors: Ching-Chuan Lam, 藍景傳
• Other Authors: Guan-Chyun Hsieh
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/19166280609134310282

碩士 === 國立臺灣科技大學 === 電子工程系 === 88 === This thesis presents a strategy for realizing a medium-power module AC/DC converter by using two-switch forward converter. An active-power-factor-controlled topology is employed to have better power factor and the multiple-output is accomplished by the Mag-Amp PWM (magnetic-amplifier pulse-width-modulation) topology to reach good voltage regulation. A master-slave active current sharing technique is used as the modulus parallel strategy in the design. A complete small-signal flow chart and inner transfer function of the master and slave module converter is derived. Designing a example and realizing a power supply with 2+1 modules of total power 1350W (Single module’s output is 5V/34A, 3.3V/40A and 12V/20A-450W) two-switch forward converter including the Mag-Amp PWM and parallel load current sharing is conducted to assess the system performance and to verify the theoretical predictions. Single module can provide an efficiency of 68.3% at the low line input (ac 90V) and full load output. Every output has a good voltage regulation is within ±5%, and a good current sharing tolerance is within ±10% under full load conditions.