Development of High Efficiency Contactless Power Supply System for Stocker System

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.

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Development of high-efficiency downsized power conversion (380 V to −48 V) equipment for HVDC power supply system

2015 IEEE International Telecommunications Energy Conference (INTELEC) ◽

10.1109/intlec.2015.7572361 ◽

2015 ◽

Author(s):

Naoki Hanaoka ◽

Akiko Takahashi ◽

Toru Tanaka ◽

Nobuhiko Yamashita ◽

Masahisa Sugahara

Keyword(s):

Power Supply ◽

Power Supply System ◽

High Efficiency ◽

Power Conversion ◽

Supply System

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Impact of Current Pulsation on BLDC Motor Parameters

Sensors ◽

10.3390/s21020587 ◽

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.

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Adaptive Solar Power Supply System Based on SCM

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1030-1032.485 ◽

2014 ◽

Vol 1030-1032 ◽

pp. 485-488

Author(s):

Kai Xuan Han ◽

Shao Fei Wang

Keyword(s):

Power Supply ◽

Power Supply System ◽

High Efficiency ◽

Solar Power ◽

Electric Energy ◽

Supply System ◽

The Sun ◽

Low Carbon ◽

Lighting System ◽

Hardware Circuit

This paper presented a kind of design principle and method of the adaptive solar power supply system, and draw out the lighting system, hardware circuit and software flow charts of the system. Using MCU control solar lighting system to track the sun direction, the system collects the sun angle information through optical sensor in order to use solar energy in high efficiency. The device not only can provide reliable electric energy for the highway cameras, visibility detectors and other dispersion equipment, but has the advantages of low carbon, environmental protection, intelligence, etc.

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