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Research on Carrier Wave Communication Technology for Contactless Power Supply Applied in EMS

Author: ZhangLiang
Tutor: LouPeiHuang
School: Nanjing University of Aeronautics and Astronautics
Course: Mechanical and Electronic Engineering
Keywords: EMS CPS carrier wave communication modulation and demodulation Binary Frequency Shift Key
CLC: TM73
Type: Master's thesis
Year: 2011
Downloads: 58
Quote: 0
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Abstract


Electrified Monorail System (EMS), which acts as a logistics automated transfer system in industrial manufacture, has been widely employed. With the growing attention to safety and environment, higher requirements of power supply and signal transmission used in logistics transportation equipment have been proposed. Owing to the unique characteristics of power supply style, Contactless Power Supply (CPS) turns out to be a novel technology of power transmission. Because of the weakness of the traditional communication styles, slide wire, industrial field bus and wireless LAN cannot meet the particular demands, it is urgent to find the carrier wave communication technology, which utilizes the wire used for transmitting power as the communication channel, completes the process of control signal transmission rather than destroy the construction of the contactless power supply. It also owns the particularities of low cost, high integration and flexible layout.In this thesis, typical EMS of CPS is studied as an application to explore the basic principles and structure of carrier wave communication technology, which is based on Binary Frequency Shift Key (2FSK) modulation and demodulation method. The carrier wave communication technology is investigated based on the channel of power transfer line as well as its application in EMS.Two different structures of carrier wave system in CPS and three modulation styles are compared to figure out 2FSK as the vintage carrier wave communication method. The carrier wave frequencies are ensured through the simulation of the wave spectrum, and the filter programs are compared and decided when the theoretical analysis of insertion loss of the communication channel is proposed. Then the simulation proves the carrier waveform generator and the filter circuit correct, and the focus lies on the detailed R&D of modulation and demodulation circuit. The carrier wave transceiver is developed and applied in EMS. The preliminary application experiment sufficiently verifies the feasibility and other advantages of the carrier wave communication technology, in which the wire used for transmitting power is applied as the communication channel.Finally, a brief summary of the research and achievement is made, and further prospect of the research is discussed.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system scheduling, management, communication
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