Back to results
US 2019/0058381 A1Published application
Rotating electric machine
AssigneesDaikin Industries, Ltd., Nagoya Institute of Technology
InventorsYoshinari ASANO, Takashi KOSAKA
Life of this patent
Estimating the term…
Abstract
A stator core and a rotor core are provided. The stator core includes field windings receiving a direct current, and armature windings receiving an alternating current. Permanent magnets, each housed in one of the slots together with ones of the field windings, and in contact with the ones of the field windings, are provided. The field windings are provided on both of inner and outer circumferential sides of the permanent magnets.
Claims7
A rotary electric machine comprising:
- a stator core including
- teeth arranged at predetermined intervals along a circumference of a ring-like stator yoke, and
- slots, each formed between two of the teeth;
- a rotor core facing the stator core with a predetermined air gap interposed therebetween:
- field windings, each housed in one of the slots and receiving a direct current;
- armature windings, each wound around predetermined one(s) of the teeth, housed in ones of the slots, and receiving an alternating current;
- permanent magnets, each housed in one of the slots together with ones of the field windings, and in contact with the ones of the field windings;
- and
- a power source configured to supply electric power to the field windings, wherein
- the field windings are provided on both of inner and outer circumferential sides of the permanent magnets, and
- ones of the field windings, which face each other on the inner and outer circumferential sides with one of the permanent magnets interposed therebetween, are wound in the same direction as viewed from an end of the power source, from which the current flows in.
8 more elements
A method of operating a rotary electric machine, where
- the rotary electric machine includes
- a stator core including
- teeth arranged at predetermined intervals along a circumference of a ring-like stator yoke, and
- slots, each formed between two of the teeth;
- a rotor core facing the stator core with a predetermined air gap interposed therebetween;
- field windings, each housed in one of the slots and receiving a direct current;
- armature windings, each wound around predetermined one(s) of the teeth, housed in ones of the slots, and receiving an alternating current;
- permanent magnets, each housed in one of the slots together with ones of the field windings, and in contact with the ones of the field windings;
- and a power source configured to supply electric power to the field windings,
- the field windings are provided on both of inner and outer circumferential sides of each of the permanent magnets, ones of the field windings, which face each other on the inner and outer circumferential sides with one of the permanent magnets interposed therebetween, are wound in a same direction as viewed from ends of the field windings, through which a current from the power source flows in,
- the method comprising:
- selecting one of operation modes;
- and
- operating the rotary electric machine in the selected one of the operation modes, wherein
- the operation modes include at least two of:
- a first operation mode in which no current flows to the field windings,
- a second operation mode in which a current flows to the field windings so that magnetic flux of the field windings flows m field slot yoke portions in a direction opposite to magnetic flux of the magnets interposed between the field windings, and
- a third operation mode in which a current flows to the field windings so that the magnetic flux of the field windings flows in the field slot yoke portions in a same direction as the magnetic flux of the magnets interposed between the field windings.
15 more elements
Dependencies are inferred from the claim text.