Patent ID: 11916502
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An electric power conversion apparatus comprising:
a rotating electric machine including a plurality of armature windings each having a first end and a second end;
a first inverter including a plurality of switch pairs each consisting of a first upper-arm switch and a first lower-arm switch that are connected in series with each other, the first inverter connecting the first ends of the armature windings with a first storage battery;
a second inverter including a plurality of switch pairs each consisting of a second upper-arm switch and a second lower-arm switch that are connected in series with each other, the second inverter connecting the second ends of the armature windings with a second storage battery;
a first positive bus connected with a positive terminal of the first storage battery;
a second positive bus connected with a positive terminal of the second storage battery;
a first negative bus connected with a negative terminal of the first storage battery;
a second negative bus connected with a negative terminal of the second storage battery;
a changeover switch configured to electrically connect or disconnect between the first positive bus and the second positive bus or between the first negative bus and the second negative bus; and
an operating unit configured to operate the changeover switch, the first upper-arm and first lower-arm switches of the first inverter and the second upper-arm and second lower-arm switches of the second inverter,
wherein
each of the armature windings has the first end thereof connected to a junction point between the first upper-arm and first lower-arm switches of a corresponding one of the switch pairs of the first inverter and the second end thereof connected to a junction point between the second upper-arm and second lower-arm switches of a corresponding one of the switch pairs of the second inverter,
the operating unit is further configured to perform, with the changeover switch being in an ON state, a first energization process and a second energization process alternately by operating the first upper-arm and first lower-arm switches of the first inverter and the second upper-arm and second lower-arm switches of the second inverter,
in the first energization process, electric current is supplied from the first storage battery to the second storage battery via the first inverter, at least one of the armature windings and the second inverter, and
in the second energization process, electric current is supplied from the second storage battery to the first storage battery via the second inverter, at least one of the armature windings and the first inverter.