Title: Method for maintaining a direct voltage at the input of a DC/AC voltage converter, recording medium for this method, and electric vehicle
Application Number: 200610141525 Application Date: 2006.09.29
Publication Number: 1949661 Publication Date: 2007.04.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02P27/06;H02M7/44
Applicant(s) Name: Alstom Transp SA Address:
Inventor(s) Name: Chanal Pierre
Attorney & Agent: wangyang
Abstract:
    A method for maintaining a DC voltage applied to an input of a DC-AC converter can maintain an asynchronous motor in a magnetization state, the input of the converter is connected with a DC supply bus of a motor vehicle, and in a free wheel mode that the vehicle performs coasting driving and a connection between a busbar and a dropper, the method includes (a) a step (76) for magnetizing the motor, (b) a step (78) for operating the motor as a generator of an AC voltage, then (c) a step (72) for stopping the converter when the DC voltage of the bus reaches an upper limit threshold, and (d) a step (74) for maintaining the converter in an idling state as long as the DC voltage of the bus remains higher than a minimum DC magnetization voltage of the asynchronous motor.
Time: 9
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