High-efficiency power supply system for server machines in data center

2013 ◽  
Author(s):  
Yuki Kuroda ◽  
Akihito Akai ◽  
Takeshi Kato ◽  
Yasuyuki Kudo
Keyword(s):  
Power Supply ◽  
Data Center ◽  
Power Supply System ◽  
High Efficiency ◽  
Supply System

Development of High Efficiency Contactless Power Supply System for Stocker System

2010 ◽  
Vol 24 (2) ◽  
pp. 77-85
Author(s):  
Gye-Ho Hwang ◽  
Won-Gon Kim ◽  
Jong-Bo Yun ◽  
In-Ho Moon ◽  
Bong-Seob Lee ◽  
...  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
High Efficiency ◽  
Supply System

scholarly journals Research on Digital Synchronous Rectification for a High-Efficiency DC-DC Converter in an Auxiliary Power Supply System of Magnetic Levitation

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 51 ◽  
Author(s):  
Zhiqin Zhao ◽  
Xiaoqiong He
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
High Efficiency ◽  
Magnetic Levitation ◽  
Supply System ◽  
Zero Voltage Switching ◽  
Auxiliary Power ◽  
Zero Current Switching ◽  
Zero Current ◽  
Synchronous Rectification

In this paper, a new auxiliary power supply system of magnetic levitation based on the LLC DC-DC converter is proposed. The switches of the DC-DC converter are SiC MOSFET, which enables high frequency, high temperature, and high power density. For further improving the efficiency of the system and realizing the stability of the output voltage under different load conditions, the digital synchronous rectification (DSR) based on the phase shift control strategy is proposed. The prototype of the LLC DC-DC converter based on SiC MOSFET is implemented, which can realize zero voltage switching (ZVS) and zero current switching (ZCS). Then, the thermal image of DSR is presented, which proves that the power loss of SiC MOSFET with DSR is relatively low. Additionally, the system efficiency among the Si IGBT, SiC MOSFET, and SiC MOSFET with DSR is analyzed and the prototype demonstrates 98% peak efficiency. Finally, simulations, experiments, and data analysis prove the superiority of the proposed DSR strategy for the new auxiliary power supply system of magnetic levitation.

scholarly journals Impact of Current Pulsation on BLDC Motor Parameters

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 587
Author(s):  
Andrzej Sikora ◽  
Marcin Woźniak
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Permanent Magnets ◽  
High Efficiency ◽  
Supply System ◽  
Energy Losses ◽  
Bldc Motor ◽  
Power Cycle ◽  
Proposed Modification ◽  
Current Pulsation

BrushLess Direct-Current (BLDC) motors are characterized by high efficiency and reliability due to the fact that the BLDC motor does not require power to the rotor. The rotor of the BLDC motor consists of permanent magnets. When examining the waveform of the current supplied to the motor windings, significant current ripple was observed within one power cycle, where the optimum value would be the constant value of this current during one power cycle. The variability of this current in one motor supply cycle results from the variability of the electromotive force induced in the motor winding. The paper presents a diagram of the power supply system consisting of an electronic commutator and a DC/DC converter made by the authors, and a proposed modification of the power supply system reducing the current pulsation of the motor windings and thus the possibility of reducing energy losses in the motor windings. The paper presents numerous results of measurements which showed a significant reduction in energy losses in the case of low-load operation.

scholarly journals Research on the Application of Renewable Energy in DC Data Center

2021 ◽  
Vol 2108 (1) ◽  
pp. 012054
Author(s):  
Xingyu Bai
Keyword(s):  
Information Technology ◽  
Renewable Energy ◽  
Energy Storage ◽  
Power Supply ◽  
Data Center ◽  
Power Supply System ◽  
Data Centers ◽  
Supply System ◽  
Dc Power ◽  
Dc Power Supply

Abstract With the rapid development of the information technology industry, the demand for data centers is gradually expanding. As the foundation of carrying many information technology services, data centers have been built and put into use on a large scale. At the same time, the characteristics of huge energy consumption are more obvious. Due to the defects of low utilization rate, heavy pollution and limited reserves of traditional fossil fuels when supplying energy for data centers, the development of green renewable energy has become an inevitable demand. This paper studies the key technologies involved in supplying power to DC power supply data center with renewable energy, and makes a case to compare the DC power supply system and the AC power supply system. This paper also pays attention to the technology of energy storage in data center, and makes an analysis to prove the advantages of energy storage data center. In addition, this paper studies and summarizes the application of multi-station integration technology and other issues.

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