Patent ID: 9543880
Date: 2017-01-10
CPC Classifications: B62D,H02P

Claim:
1. A rotary machine control apparatus controlling a drive of a rotary machine that has a plurality of winding groups, the rotary machine control apparatus comprising: electric power converters in a plurality of systems, wherein each of the electric power converters has a switching element in an upper arm and a switching element in a lower arm and converts DC power to supply to a corresponding winding group corresponding to each of the electric power converters, and the switching element in the upper arm is bridge connected to the switching element in the lower arm; a failure detection portion, using a processor, detecting a failure of an electric power converter or a winding group; and a control portion, using a processor, calculating a current command value, which instructs current sent to each of the winding groups in the rotary machine and a maximum current limit value to the current command value, and controlling an output to each of the electric power converters for each of the systems, wherein: a partial system short circuit failure corresponds to a case where any portion between wirings in the electric power converters or the winding groups in either of the systems is in a conductive state against a control indicating a non-conductive state; and when the failure detection portion detects the partial system short circuit failure in the electric power converter or the winding group in either of the systems, the control portion stops the output to the electric power converter in a failure system, the control portion increases the maximum current limit value as a rotation angular velocity of the rotary machine is larger, and the control portion controls the output to an electric power converter in a normal system.