KR100598880B1 - Structure of end coil in driving motor - Google Patents

Abstract

An end coil structure of a drive motor is disclosed. The end coil structure of the disclosed driving motor includes an insulating ring formed of a circular insulating member, and U, V, and W phases are sequentially inserted into the insulating ring while being electrically connected to a neutral point to collect slots of each phase. It characterized in that it comprises a; U-phase, V-phase, W-phase and neutral bus bar formed with a connection for electrically connecting.

According to the present invention, it is possible to contribute to the performance improvement by reducing the electrical noise, it is possible to automate the mass production, it is possible to reduce the time or labor, there is an advantage that can reduce the size of the motor.

HEV, drive motor, end coil

Description

End coil structure of driving motor {STRUCTURE OF END COIL IN DRIVING MOTOR}

1 is a schematic view schematically showing the configuration of an electric drive system for a general hybrid electric vehicle.

2 and 3 is a schematic view showing the configuration of the end coil structure of the drive motor according to the present invention.

Figure 4 is a circuit diagram schematically showing the configuration of the end coil structure of the drive motor according to the present invention.

5 is a configuration diagram of the insulating ring of FIG.

6 is a configuration diagram of a bus bar of FIG. 2.

<Description of Symbols for Main Parts of Drawings>

20. U-phase busbar

30.V phase bus bar

40. Phase W busbar

50. Neutral Busbar

100. Insulation Ring

120. Membrane

The present invention relates to an end coil structure of a drive motor, and more particularly, to an end coil structure of an improved drive motor to contribute to performance and cost reduction, and to improve design ease and workability.

In general, a hybrid electric vehicle (hereinafter referred to as HEV) is a vehicle that combines driving by an engine and driving by an electric motor, that is, maintains a driving state by varying driving means according to a driver's needs.

For example, as shown in FIG. 1, a general parallel soft type HEV is an engine 10 as a main power source, and the driving motor 11 is relatively power compared to a conventional internal combustion engine vehicle. ) Has been used only as an auxiliary power source to assist in the lack of power due to the use of smaller ones.

The crank shaft of the engine 10 and the rotor 11a rotation shaft of the driving motor 11 are directly connected to each other so that the driving motor 11 always rotates when the engine 10 operates. The other end of the rotor 11a of the drive motor 11 is composed of a separate part from the drive motor 11, and the clutch 13 for the power transmission control function to the transmission (T / M) 12. )

The HEV drive motors 11 are three-phase (U, V, W), and although not shown in the figure, the TB HEV drive motors are 24 slots and 16-pole thin motors. Number 24 / constant 3) The coils are connected in parallel.

The coils connected in this way must be connected to the power connectors of the corresponding phases, and the coils on the opposite side of the slots are connected to the neutral point.

On the other hand, reference numeral 11b, which is not described in FIG. 1, is a stator of the drive motor 11, and 14 is a motor control unit for controlling the operation of the drive motor 11 (hereinafter referred to as MCU). And 15 represents the battery.

By the way, in the conventional HEV drive motor configured as described above, the end coil is made by hand, which is not suitable for mass production. Therefore, automatic fairing for mass production is needed.

And more coils were used to collect the coils in each slot onto U, V, and W. As a result, the electrical noise is increased due to the inductance generated in the coil.

In addition, in terms of packaging of the vehicle, the driving motor should be thin, but the optimal length of the packaging is impossible due to the long length of the end coil.

The present invention has been made to solve the above problems, to provide an end coil structure of the drive motor to reduce the amount of use of the coil to reduce electrical noise, automation, and to reduce the size of the motor to facilitate design. Its purpose is.

The end coil structure of the drive motor of the present invention for achieving the above object, while the insulating ring made of a circular insulating member, and the U-phase, V-phase and W-phase are sequentially connected to the neutral ring and the neutral point By inserting the slots of each phase, the U-phase, V-phase, W-phase and neutral bus bar formed with a connection for electrically connecting with the neutral point; characterized in that it comprises a.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 schematically show the configuration of the end coil structure of the drive motor according to the present invention, Figure 4 shows a circuit diagram showing the electrical connection.

Prior to the description, the description of the configuration of the end coil structure of the general drive motor will be omitted, and only the characteristic configuration according to the present invention will be described herein.

Referring to the drawings, the end coil structure of the drive motor according to the present invention is circular, for example, an insulation ring (insulation ring) 100 made of a plastic insulating member as shown in Figure 5, and the insulating ring ( The U, V, and W phases are sequentially inserted into the neutral point and electrically connected to the neutral point to collect the slots of each phase, and the U, V, W, and neutral bus bars having a connection portion electrically connected to the neutral point. 20, 30, 40, and 50 (bush bar).

The U-phase, V-phase, W-phase, and neutral bus bars 20, 30, 40, and 50 are formed in an open ring form as shown in FIG.

And the connection portion provided in the U-phase, V-phase, W-phase and neutral bus bar (20, 30, 40, 50), the bus bar (20, 30, 40, 50) of the open ring form at regular intervals It is made of a projection formed to protrude in one direction as much as one slot provided.

In particular, although FIG. 6 illustrates the protrusion 21 formed on the U-phase busbar 20 as an example, other V-phase, W-phase, and neutral busbars 30, 40, and 50 are formed in the same shape.

In addition, the projections 21 of the U-phase bus bar 20 and the projections of the V-phase bus bar 30 or the W-phase bus bar 40 are formed by eight, respectively, the projection of the mid-island bus bar 50 24 are formed. That is, the projections 21 of the U-phase busbar 20 and the projections of the V-phase or W-phase busbars 30 and 40 are formed at 45 ° intervals, and the neutral busbar 50 is formed at 15 ° intervals. .

And, as shown in Figure 2, the U-phase, V-phase, W-phase bus bars (20, 30, 40) are fitted to the insulating ring 100 at a predetermined interval, each bus bar (20, 30) Between the 40 is provided with a blocking film 120 made of an insulating member. That is, the bus bars 20, 30, 40 are provided between the bus bars 20, 30, 40, and 50 so that the bus bars 20, 30, 40, and 50 are not energized with each other. It is insulated between busbars.

Meanwhile, reference numeral 110, which is not described in the drawings, shows a through hole formed in the center of the insulating ring 100, and 22 shows a fixing part for fixing the bus bar 20.

Referring to the operation of the end coil structure of the drive motor according to the present invention having the configuration as described above are as follows.

Prior to the description, the description of the configuration of the end coil structure of the general drive motor will be omitted, and only the characteristic configuration according to the present invention will be described herein.

Referring back to the drawings, the HEV drive motor according to the prior art, as described above, is not suitable for mass production, that is, mass production is poor, electrical properties are poor, there was a problem in terms of packaging.

However, the end coil structure of the driving motor according to the present invention solves the above-mentioned problems because it is not necessary to use a coil more than necessary to connect to the power connector of the phase corresponding to the existing coil.

To this end, the U-phase bus bar 20, V-phase bus bar sequentially from the outside of the insulating ring 100 made of an insulating material so that the four bus bars (20, 30, 40, 50) can be fitted (30), the W phase bus bar 40 is fitted. And the center point bus bar 50 is inserted in the center of the insulating ring 100.

2 and 6, the assembly is mounted on the stator of the driving motor and welded (welded) the protrusions and the coils of the bus bars 20, 30, 40, and 50.

Therefore, as shown in the related art, it is not necessary to use more coils than necessary to collect the coils of each slot into the U phase, the V phase, and the W phase, and can be neatly assembled, and the assembly structure of the drive motor is simple.

Accordingly, the electrical noise due to the inductance generated in the coil can be reduced, thereby improving mass productivity and electrical characteristics.

On the other hand, as described above, the design point of the HEV drive motor is in a thin structure. Therefore, the space required by the end coil can be reduced, which is advantageous in terms of packaging the drive motor.

 As described above, the end coil structure of the driving motor according to the present invention has the following effects.

Reducing the coil reduces electrical noise caused by the inductance of the coil, contributing to improved performance.

And it is possible to automate the conventional jig by using a dedicated jig, it is possible to reduce the time or labor due to the production during mass production. Therefore, it can contribute to cost reduction.

In addition, the size of the motor can be reduced by reducing the space occupied by the end coil, thereby avoiding interference with other parts in the engine room. Therefore, the ease of design and workability are improved.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (5)

An insulating ring made of a circular insulating member, U-phase, V-phase, and W-phase are inserted into the insulation ring while being electrically connected to the neutral point to collect slots of each phase, and the U-phase, V-phase, W-phase, and neutral buses having a connection portion for electrically connecting the neutral point are formed. End coil structure of the drive motor comprising a bar. The method of claim 1, The bus bar is the end coil structure of the drive motor, characterized in that the open ring shape. The method of claim 2, The connecting portion, End coil structure of the drive motor, characterized in that the protrusion formed to protrude in one direction as much as the slot provided at a predetermined interval on the bus bar formed in the open ring shape. The method of claim 3, An end coil of the driving motor, wherein the protrusions of the U-phase bus bar, the V-phase bus bar, or the W-phase bus bar are each eight, and the protrusions of the mid-island bus bar are formed 24. rescue. The method of claim 1, When the U-phase, V-phase, W-phase busbars are fitted to the insulating ring at a predetermined interval, an end coil structure of the drive motor, characterized in that a blocking film made of an insulating member is provided between each busbar.

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