| 摘要 |
<P>PROBLEM TO BE SOLVED: To safely rescue passengers even if the components of both systems fail at the same time. <P>SOLUTION: A drive system A in which a system A connection means 3a, a system A converter 4a, and a system A inverter 5a are connected in series to a power supply 1 is connected parallel with a drive system B in which a system B connection means 3b, a system B converter 4b, and a system B inverter 5b are connected in series to the power supply 1. One or a plurality of system connection means 7a and 7b or 8a and 8b are installed between the converter and inverter of each system, and a different system connection means 24c or 24d and 24e are installed between the systems A and B. Also system connection means 6a and 6b are installed on the inverter output side of each system, and the different system connection means is installed crossingly with both end parts of the system connection means 6a of the system A and both end parts of the system connection means 6b of the system B. These connection means are controllably turned on and off to safely rescue the passengers by an intermittent operation when one converter fails, different converter and inverter fail simultaneously, on inverter fails, or a motor winding fails. <P>COPYRIGHT: (C)2004,JPO |
