Rotating electrical machine and rotating electrical machine system
View Patent ↗Provided is a rotating electrical machine in which torque ripple can be decreased at the time of one-side electrical current supply. A motor includes a stator coil constituted by concentrated windings arranged to teeth where an integer N≥2. The stator coil includes first and second winding units and each of which is constituted by windings and which are independent from each other, the windings constituting the first winding unit are arranged in three teeth groups, each of which includes adjacent teeth and which are provided at 120-degree pitches in terms of mechanical angle, and the windings constituting the second winding unit are arranged in teeth which are the teeth not included in the three teeth groups. That is, the windings constituting the second winding unit are also arranged in three teeth groups, which are provided at 120-degree pitches in terms of mechanical angle.
1. A rotating electrical machine comprising:
a stator iron core including 6N teeth where an integer N≥2;
a stator winding including concentrated windings arranged to the respective 6N teeth, wherein the stator winding includes a first three-phase winding and a second three-phase winding each of which is constituted by 3N windings and which are independent from each other, wherein the 3N windings constituting the first three-phase winding are arranged in three teeth groups each of which includes N adjacent teeth and which are provided at 120-degree pitches in terms of mechanical angle,
a first inverter connected to the first three-phase winding;
a second inverter connected to the second three-phase winding;
a first opening/closing switch configured to perform connection and interruption between the first three-phase winding and the first inverter;
a second opening/closing switch configured to perform connection and interruption between the second three-phase winding and the second inverter;
a third opening/closing switch provided between a first connection line connecting the first opening closing switch to the first three-phase winding and a second connection line connecting the second opening/closing switch to the second three-phase winding to perform connection and interruption between the first connection line and the second connection line; and
a control unit, in a case where the first and second inverters are normal, causing the first and second opening/closing switches to perform connection and causing the third opening/closing switch to perform interruption and, in a case where either the first or the second inverter is abnormal, causing the opening/closing switch connected to the abnormal inverter to perform interruption and causing the third opening/closing switch to perform connection.
2. The rotating electrical machine according to claim 1 , wherein a configuration of the rotating electrical machine is any one of an 8-pole 12-slot configuration, a 16-pole 12-slot configuration, a 10-pole 12-slot configuration, a 14-pole 12-slot configuration, a 12-pole 18-slot configuration, a 14-pole 18-slot configuration, and a 16-pole 18-slot configuration.
3. The rotating electrical machine system according to claim 1 , wherein, in the first three-phase winding and the second three-phase winding, no electrical phase difference is generated in the windings in the same phase.