Patent ID: 12237740

MODE FOR INVENTION

Hereafter, an preferred embodiment of the present invention that can achieve the objects of the present invention in detail is described with reference to the accompanying drawings. In the description of the present embodiment, the same components are given the same names and reference numerals, and are not repeatedly described.

FIG.1is a view showing the shape of a 6-phase driving motor according to an embodiment of the present invention.

As shown inFIG.1, an electric motor according to an embodiment of the present invention includes a rotor100, a stator200, coil units300, a first input terminal unit500, and a second input terminal unit600.

The stator200includes a ring-shaped inner circumferential part210and n cores (n is a natural number greater than 6) on which the coil units300mounted, and a plurality of such cores are arranged along the circumference of the inner circumferential part210.

The rotor100includes an outer circumferential part110disposed to surround the circumference of the stator200, and a plurality of permanent magnets120disposed between the outer circumferential part110and the stator200. Here, the permanent magnets120may be naturally replaced with field wires.

That is, the electric motor according to the present embodiment may have a type in which the rotor100that rotates is disposed outside the stator200, and the rotor100may be connected to an object to which rotation driving force is applied.

In addition, in the present embodiment, a hole212in which an external structure for fixing the stator200may be formed inside the inner circumferential part210of the stator200. Further, an anti-rotation protrusion214that is coupled to an external structure and prevents rotation of the stator200is further disposed on the inner circumferential surface of the inner circumferential part210.

Further, n coil units300(n is a natural number greater than 6) disposed at the stator200may be electrically connected by end turns400connecting each of the coil units300to each other.

Further, the first input terminal unit500may be connected to three coil units300selected from the n coil units300and the second input terminal unit600may be connected to the other three coil units300.

FIG.2is a view showing the shape of the first input terminal unit500in the 6-phase driving motor according to an embodiment of the present invention andFIG.3is a view showing the second input terminal unit600in the 6-phase driving motor according to an embodiment of the present invention.

As shown inFIGS.2to3, the first input terminal unit500includes input terminals510,520, and530that are connected to three coil unit300selected from the n coil units300, respectively, and are made of a first conductor material. The input terminals are, for the convenience of description, referred to as a 1-1 input terminal510, a 1-2 input terminal520, and a 1-3 input terminal.

Further, the second input terminal unit600includes input terminals610,620and630that are respectively connected to three coil unit300selected from the other coil units300other than the three coil unit300to which the first input terminal unit500is connected, and are made of a second conductor material that is different from the first conductor. The input terminals610,620and630are, for the convenience of description, referred to as a 2-1 input terminal610, a 2-2 input terminal620and a 2-3 input terminal630.

That is, accordingly, the first input terminal unit500and the second input terminal unit600together can form 6-phase input terminals.

In particular, in the present embodiment, the first input terminal unit500and the second input terminal unit600have a type connected to coil units300wound on cores positioned opposite each other with the center point of the stator200therebetween.

The reason is for maximally secure a gap distance of the first input terminal unit500and the second input terminal unit600such that the connection structures thereof do not interfere with each other and the center of gravity of the entire driving motor is not biased to a side.

Further, each of the input terminals510,520and530of the first input terminal unit500and the input terminals610,620and630of the second input terminal unit600may be connected to three continuously adjacent coil units300.

This is for minimizing the areas occupied by the first input terminal unit500and the second input terminal unit600and making the connection structure as simple as possible.

Meanwhile, each of the 1-1 input terminal510and the 1-3 input terminal530of the first input terminal unit500includes coil connecting portions512and532connected with connecting portions330of the coil units300, extension portions514and534having one end perpendicularly connected to the coil connecting portions512and532in parallel with the end turns400to extend by a predetermined length, and power connecting portions516and536connected to the other end of the extension portions514and534at a predetermined angle to extend in the lateral direction of the stator200, and connected to external power source.

Further, the 1-2 input terminal520of the first input terminal unit500includes a coil connecting portion522connected to the connecting portion330of the coil unit300, and a power connecting portion526connected to the coil connecting portion522at a predetermined angle to extend in the lateral direction of the stator200and connected to an external power source, and does not have an extension portion.

Accordingly, since the 1-1 input terminal510, the 1-2 input terminal520, and the 1-3 input terminal530extend in the lateral direction of the stator200with the power connecting portions516,526and536in parallel, a more simple connection structure can be provided.

Similarly, each of the 2-1 input terminal610and the 2-3 input terminal630of the second input terminal unit600includes coil connecting portions612and632connected with connecting portions330of the coil units300, extension portions612and632having one end perpendicularly connected to the coil connecting portions612and632in parallel with the end turns400to extend by a predetermined length, and power connecting portions616and636connected to the other end of the extension portions614and634at a predetermined angle to extend in the lateral direction of the stator200and connected to an external power source.

Further, the 2-2 input terminal620of the second input terminal unit600includes a coil connecting portion622connected to the connecting portion330of the coil unit300, and a power connecting portion626connected to the coil connecting portion622at a predetermined angle to extend in the lateral direction of the stator200and connected to an external power source, and does not have an extension portion.

Accordingly, since the 2-1 input terminal610, the 2-2 input terminal620and the 2-3 input terminal630extend in the lateral direction of the stator200with the power connecting portions616,626and636in parallel, similar to the first input terminal unit500, a more simple connection structure can be provided.

Meanwhile, as described above, the first input terminal unit500may be made of a first conductor material and the second input terminal unit600may be made of a second conductor material that is different from the first conductor material.

In this case, the first conductor may be made of a material that is higher in conductivity than the second conductor. Accordingly, when the rotor100is driven at a speed less than a predetermined reference speed, the 6-phase driving motor of the present embodiment can be controlled to apply a current through the first input terminal unit500, and when the rotor100is driven at a speed over the predetermined reference speed, the 6-phase driving motor can be controlled to apply a current through the second input terminal unit600.

Meanwhile, when the rotor100is driven at a maximum speed higher than the reference speed, the 6-phase driving motor can be controlled to apply a current through both the first input terminal unit500and the second input terminal unit600.

That is, the 6-phase driving motor of the present embodiment can have a selective current appliance characteristic in which a current is applied through the high-conductive first input terminal unit500at a low speed, a current is applied through a low-conductive second input terminal unit600at a high speed, and a current is applied through both the first input terminal unit500and the second input terminal unit600at the maximum output, which is for providing high efficiency over the entire section by solving the problem of AC resistance.

In particular, the first conductor includes a copper material and the second conductor includes an aluminum material in the present embodiment, but this is not limited by the present embodiment.

Although preferred embodiments of the present disclose were described above, it would be apparent to those skilled in the art that the present invention may be achieved in other specific types without departing from the scope or spirit other than the embodiments described above. Accordingly, the embodiments described above should be considered as being exemplifying rather than limiting, so the present invention may be changed within the range of the claims and the equivalent range without being limited to the above description.110: outer circumferential part120: permanent magnet200: stator210: inner circumferential part212: hole214: anti-rotation protrusion300: coil unit400: end turn500: first input terminal unit510: 1-1 input terminal520: 1-2 input terminal530: 1-3 input terminal600: second input terminal unit610: 2-1 input terminal620: 2-2 input terminal630: 2-3 input terminal