Method for symmetrizing asymmetric faults
First Claim
1. In a traction chain comprising a motor driven by an inverter and associated power supply, a method of symmetrizing an asymmetric defect comprisingdetecting a defective component in said inverter which may result in the connection of a motor phase to a top point or a bottom point of said power supply;
- in response to said detecting, short circuiting only that half of the inverter comprising said defective component.
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Abstract
The present invention concerns a method for symmetrizing asymmetric faults occurring within a pull chain comprising a synchronous or asynchronous motor controlled by a two-level or multi-level inverter consisting of static switches using semiconductors such as IGBT or bipolar transistors. The invention comprises detecting whether the fault connects or may connect a motor phase with the top point or the bottom point of the inverter power supply, and short-circuiting only the half of the inverter affected by the fault on the basis of the detection.
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Citations
7 Claims
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1. In a traction chain comprising a motor driven by an inverter and associated power supply, a method of symmetrizing an asymmetric defect comprising
detecting a defective component in said inverter which may result in the connection of a motor phase to a top point or a bottom point of said power supply; in response to said detecting, short circuiting only that half of the inverter comprising said defective component. - View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification