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The Engineering Design of Emergency Power Supply in Maglev

Author: WangZuo
Tutor: XuDeHong
School: Zhejiang University
Course: Power Electronics and Power Drives
Keywords: Maglev Contactless power supply Engineering design
CLC: U266.4
Type: Master's thesis
Year: 2006
Downloads: 130
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Abstract


In the magnetic levitation railway, the on-board power system is required to supply the on-board lights, air-conditioners and etc. Generally, an on-board linear generator system is proposed for power supply of maglev vehicles and on-board battery. In this system, the voltage induced in the linear generator varies in amplitude and frequency in proportion to vehicle velocity. But when the magiev is running at low speed, the power generated by the linear generator can’t supply the maglev any more. It will cause the exhaustion of battery energy and result in shutting down of maglev. Till now, the usually and acceptable method to deal with the emergency power supply problem is by injecting a high frequency harmonic current into the long stator windings to supply the Maglev in emergency condition. This paper proposes the methods to solve the problems in engineering emergency power system design.This Paper studies the parameters of the on-board battery and the circuit for charging the battery firstly, and then the design of the charging circuit for the auxiliary linear generator is given. To improve the power transmitting capability of the proposed system, methods of capacitor compensation are introduced into the proposed system. The principle of the capacitor compensation is analyzed in this paper, and then the experiment results on the 1:4 prototype are given to verify the analysis before. The experiment results show that the design in this paper can effectively improve the performance of the contactless emergency power supply system in the maglev. Then the required power capacitance of the auxiliary inverter can be reduced obviously.Finally, this paper gives the engineering design of the emergency power supply system, which includes the circuit of charging the battery, the scheme of improving the power transmitting capacity of this system, the implement of harmonic current injection inverter and the design of the auxiliary linear generator windings.

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CLC: > Transportation > Rail transport > Locomotive works > EMU,EMU (power train ) > Non- wheel rail Department of locomotives, Maglev,gas floating car
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