Hybrid vehicle

A hybrid vehicle driven by a power unit comprising:

• a first rotating machine comprising:
• a first rotor comprising a magnetic pole row arranged in a circumferential direction, wherein the magnetic pole row has a plurality magnetic poles and the adjacent magnetic poles have different polarities;
• a first stator disposed to face the first rotor in a radial direction and comprising an armature row comprising a plurality of armatures arranged in the circumferential direction, wherein a rotating magnetic field moving in the circumferential direction is generated by a change in magnetic poles generated by the plurality of armatures;
• and
• a second rotor disposed between the first rotor and the first stator and comprising a plurality of soft magnetic material elements arranged in the circumferential direction with a gap between the soft magnetic material elements,
• wherein the ratio between the number of magnetic poles generated by the armature row of the first stator, the number of magnetic poles of the magnetic pole row of the first rotor, the number of the soft magnetic material elements of the second rotor is set to 1:
• m:(1+m)/2 (m≠1), and one of the first rotor and the second rotor is connected to a drive shaft;
• a power engine, wherein an output shaft of the power engine is connected to the other of the first rotor and the second rotor;
• a second rotating machine configured to exchange a motive power with the drive shaft and to exchange an electric power with the first rotating machine;
• a capacitor configured to exchange an electric power between the first rotating machine and the second rotating machine;
• a transformer that steps up a voltage when exchanging an electric power between the capacitor and at least one of the first rotating machine and the second rotating machine;
• and
• an electric power transformer that transforms electric power exchanged between the capacitor and the first rotating machine and the second rotating machine,
• the hybrid vehicle comprising:
• a voltage demand calculator that calculates a voltage demand required for each of the first rotating machine and the second rotating machine in accordance with an operating condition of the hybrid vehicle;
• and
• a controller that controls the transformer to step-up the voltage with a step-up ratio so as to meet the voltage demands calculated by the voltage demand calculator and to minimize the sum of losses generated in the first rotating machine, the second rotating machine, the electric power transformer, and the transformer.

A hybrid vehicle driven by a power unit comprising:

• a first rotating machine comprising:
• a first rotor comprising a magnetic pole row arranged in a circumferential direction, wherein the magnetic pole row has a plurality magnetic poles and the adjacent magnetic poles have different polarities;
• a first stator disposed to face the first rotor in a radial direction and comprising an armature row comprising a plurality of armatures arranged in the circumferential direction, wherein a rotating magnetic field moving in the circumferential direction is generated by a change in magnetic poles generated by the plurality of armatures;
• and
• a second rotor disposed between the first rotor and the first stator and comprising a plurality of soft magnetic material elements arranged in the circumferential direction with a gap between the soft magnetic material elements,
• wherein the ratio between the number of magnetic poles generated by the armature row of the first stator, the number of magnetic poles of the magnetic pole row of the first rotor, the number of the soft magnetic material elements of the second rotor is set to 1:m:(1+m)/2 (m≠1), and one of the first rotor and the second rotor is connected to a drive shaft;
• a power engine, wherein an output shaft of the power engine is connected to the other of the first rotor and the second rotor;
• a second rotating machine configured to exchange a motive power with the drive shaft and to exchange an electric power with the first rotating machine;
• a capacitor configured to exchange an electric power between the first rotating machine and the second rotating machine;
• and
• a transformer that steps up a voltage when exchanging an electric power between the capacitor and at least one of the first rotating machine and the second rotating machine,
• the hybrid vehicle comprising:
• a controller that controls the transformer to start stepping-up the output voltage of the capacitor, before the power engine is started when the hybrid vehicle travels only with motive power from at least one of the first rotating machine and the second rotating machine.