Patent ID: 9362735
Filing Date: 2016-06-07
CPC Classification: B60L,H02H,Y02T

Claim Text:
1. A feed chain having M feed outputs for supplying a synchronous electric machine with M phases, M being an integer greater than 1, the chain comprising: a converter for converting a direct input current into a polyphase alternating output current including a plurality M of phases, the converter comprising two input terminals and M output terminals and M switching branches, and capable of delivering the polyphase alternating current to said electric machine, a storage bank including at least one storage capacitor arranged between the input terminals of the converter, a detector for detecting a short-circuit outside or inside the electric machine, by measuring currents circulating in the switching branches of the converter, an insulator device for insulating the electric machine from overvoltages and/or overcurrents of the polyphase alternating current, the insulator device being arranged between the converter and the M feed outputs, and including a plurality M of branches, each branch including at least one electric switch for disconnecting the considered phase, arranged between the converter and one of the M outputs, and a controller for controlling the converter and the insulator device, the controller opening the insulator device when a short circuit is detected by the detector, wherein the detector is also configured to determine whether a detected short-circuit is a short-circuit inside the electric machine, by means of temperature sensors for measuring the temperature of the air inside the electric machine, the feed chain also including a short-circuiting device capable of connecting the M power supply outputs to each other when a short-circuit inside the electric machine is determined, the controller being capable of commanding the short-circuiting device to perform that operation.