WO2019009479A1

WO2019009479A1 - Busbar arrangement method for brushless motor

Info

Publication number: WO2019009479A1
Application number: PCT/KR2017/014171
Authority: WO
Inventors: 정진근
Original assignee: 효성전기주식회사
Priority date: 2017-07-03
Filing date: 2017-12-06
Publication date: 2019-01-10
Also published as: KR101904312B1

Abstract

The present invention relates to a brushless motor having a three-phase Y-wiring structure, comprising : a neutral point busbar installed on the upper surface of a stator, which includes a core having a hollow shape and a plurality of teeth protruding at a regular distance from each other along the circumferential direction on the inner circumference of the core; and busbars on U, V, and W phases, and in particular, to a busbar arrangement method for a brushless motor wherein the neutral point busbar is coupled to one side on the top end of the core along the length of the circumference of the core and wherein each of the busbars on the U, V, and W phases is formed in an arc shape having the same length and stacked on one side of the top end of the core to which the neutral point busbar is not coupled, wherein the neutral point busbar and the busbars on the U, V, and W phases that are stacked form a symmetry with the center part of the core at the center. The present invention was contrived to resolve the problem explained above, and by arranging the neutral point busbar on the one side and appropriately arranging the busbars on the U, V, and W phases on the other side, the structure of the busbar can be rendered simple, thereby yielding significant effects such as reducing the cost of manufacturing busbars.

Description

How to arrange the bus bars of the brushless motor

According to the present invention, there is provided a stator comprising a core in the shape of a hollow body, and a stator made up of a plurality of teeth protruding from the inner periphery of the core in a circumferential direction, The present invention relates to a bus bar arrangement method of a brushless motor having a three-phase Y wiring structure consisting of an upper bus.

In general, the bus bar refers to the ground terminal for collecting the current flow and grounding, and the motor refers to the ground terminal to which the coil is grounded.

In particular, a typical brushless motor takes the three phases of Y wiring, in which case a bus bar for grounding is required.

In the prior art relating to a bus bar constructed in such a brushless motor, a space in which a rotor can be positioned is formed inside the inside of a rotor, and in the form of circumferentially surrounding the rotor, A stator having a plurality of teeth formed therein, each stator including a flange portion formed at an end thereof; A coil wound around the winding portion, the coil including a U phase power coil, a V phase power coil, and a W phase power coil; A rotor including a permanent magnet and rotating in an inner space of the stator; And a bus bar located above the stator and the rotor, the bus bar comprising: A circular shaped injection molding formed in a hollow shape and formed of an insulating material; A power source terminal including a U power source terminal, a V power source terminal, and a W power source terminal, which are formed on one side of the injection molded product and receive power from different phases of the three phases; A U power terminal terminal protruded around the injection molded body and disposed on another plane and electrically connecting between the U power terminal and one side of the U phase power coil; A power terminal terminal including a V power terminal terminal electrically connected to the power source terminal, a W power terminal terminal electrically connecting between the W power source terminal and one side of the W phase power source coil, and a neutral terminal terminal connected to the other side of each of the wound coils; And a plurality of engaging protrusions formed at a lower portion of the molded body and inserted tightly into a plurality of slot openings formed between the plurality of tooth end portions and coupled to the stator, wherein at least one of the plurality of flange portions And a second surface defining a slot opening with a flange portion on the right and forming a slot opening with a flange portion on the left side of the flange portion when the engaging projection is inserted into the slot opening, And the motor is preloaded by being inserted between the first surface and the second surface.

In addition, in Japanese Patent Registration No. 0866655, there is disclosed a stator core comprising a split core of a stator having respective power supply lines and neutral lines inside a three-phase brushless motor for an automobile, And a neutral point to which a three-phase neutral line is connected is a Y wiring circuit. In a motor provided with a relay at a neutral point where the neutral line meets, a motor And a lower portion of the bus bar electrically connected to the upper portion of the bus bar electrically connected to the power line of the divided core of the stator and electrically connected to the neutral line of the divided core of the stator, And a pair of relays corresponding to the neutral lines of the divided cores of the stator are connected to one side of the lower part of the bus bar But there is a car brushless motor characterized in that the configuration such that a pair of relays, by connecting the neutral wire of each relay is coupled in parallel public registration.

As another embodiment, a stator core comprising a core base in which a plurality of teeth are formed in Japanese Patent Publication No. 1560057; An upper insulator coupled to an upper portion of the stator core; A lower insulator coupled to a lower portion of the stator core and having a neutral bus bar insertion portion into which an neutral bus bar is inserted; A lower bus bar housing coupled to an upper portion of the upper insulator and including a plurality of bus bar insertion portions into which a plurality of bus bars are inserted; And a coil wound around the teeth when the upper insulator and the lower insulator are coupled to each other, wherein the neutral bus bar inserting portion is provided with a plurality of coil inserting portions and coil connecting portions along an outer circumference, A plurality of neutral point coil connection portions for connection with the coils are formed in the coil connection portion, and the coils wound with one tooth are drawn to the coil introduction portion and are introduced into the adjacent other coil introduction portions through the coil connection portion Is registered and disclosed.

However, in the conventional brushless motor structure, since the bus bars of the U, V, and W phases and the bus bars of the neutral point are arranged to be irregularly mixed, the core connection is difficult and space utilization in the motor casing is difficult. Or the size of the bus bar must be made unnecessarily large.

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-described problems, and it is an object of the present invention to provide a brushless motor capable of simplifying the structure of a bus bar by disposing a neutral bus bar on one side and appropriately arranging bus bars on U, V, Bar arrangement method.

A method of arranging a bus bar of a brushless motor according to the present invention is a method of arranging a bus bar of a brushless motor comprising a core having a hollow body and a neutral bus bar mounted on an upper surface of a stator made up of a plurality of teeth protruding from the inner periphery of the core, A neutral bus bar is mounted on one side of an upper end of the core along a circumferential length of the core, and the U, V, and W phase bus bars are mounted on the brushless motor, The upper bus bars are formed in the arc shape of the same length and are stacked on one side of the upper end of the core in which the neutral bus bars are not mounted, and the U, V, It is characterized by being symmetrical.

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above problems, and it is an object of the present invention to provide a bus bar structure in which a neutral bus bar is disposed on one side and a bus bar on U, V, And a manufacturing cost can be saved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing an arrangement relationship between a coil and a bus bar connected to a core of a conventional brushless motor. FIG.

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a brushless motor, and more particularly to a brushless motor having a coil and a bus bar.

Fig. 3 is a first schematic outline of a three-phase Y wiring structure of a conventional brushless motor. Fig.

Fig. 4 is a second schematic outline of a three-phase Y wiring structure of a conventional brushless motor. Fig.

Fig. 5 is a third schematic outline of a three-phase Y wiring structure of a conventional brushless motor. Fig.

6 is a schematic diagram showing a U phase connection method according to a second embodiment of a three-phase Y wiring structure of a conventional brushless motor.

7 is a schematic diagram showing a U, V, W phase connection method according to a second embodiment of a three-phase Y wiring structure of a conventional brushless motor.

FIG. 8 is a schematic view showing a U-phase coil wiring method according to a bus bar arranging method of the brushless motor of the present invention. FIG.

9 is a schematic diagram showing a U, V, W phase connection method according to a bus bar arrangement method of the brushless motor of the present invention.

Description of the Related Art

100. Stator

110. Core 120. Teeth 130. Slot

200. Neutral bus bar 210. Neutral terminal

300. U-phase bus bar 310. First terminal 320. Second terminal

400. V-phase bus bar 410. First terminal 420. Second terminal

500 W-phase bus bar 510. First terminal 520. Second terminal

600. Coil

A method of arranging a bus bar of a brushless motor according to the present invention is a method of arranging a bus bar of a brushless motor including a hollow core 110 and a plurality of teeth 120 protruding from the inner circumference of the core 110 A brushless motor having a three-phase Y wiring structure including a neutral bus bar 200 mounted on an upper surface of a stator 100 and U, V, and W

phase bus bars

300, 400, and 500, The neutral bus bar 200 is mounted on one side of the upper end of the core 110 along the circumference of the core 110. The U, V, W

phase bus bars

300, 400, V and W

phase bus bars

300, 400 and 500 which are stacked on the other side of the upper end of the core 100 on which the neutral bus bar 200 is not mounted and are stacked with the neutral bus bar 200, Are symmetrical with respect to the center of the core 110.

The U, V, and W

phase bus bars

300, 400, and 500 have

first terminals

310, 410, and 510 and

second terminals

320, 420 and 520, respectively. V, and W

phase bus bars

300, 400, and 500 may be disposed adjacent to one end of the neutral point bus bar 200 so as to be sequentially protruded along the circumferential direction, 300, 400, and 500, the bus bars protruding at the end are arranged close to the other end of the neutral bus bar 200.

The neutral bus bar 200 is connected to the first and

second terminals

310, 410, 510, 320, 420, 520 formed on the U, V, W phase bus bars 300, And the neutral point terminal 210 of the second terminal is formed.

A coil 600 is connected to the teeth 120 of the core 110 to correspond to the neutral bus bar 200 and the U, V, and W

phase bus bars

300, 400, and 500.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principle of the invention.

As shown in FIG. 1, a brushless motor having a three-phase Y wiring structure includes a core 110 in the shape of a hollow body, and a plurality of protrusions And is composed of a neutral bus bar 200 and U, V, and W

phase bus bars

300, 400, and 500, mounted on the upper surface of the stator 100 having a plurality of teeth 120.

Since the neutral point terminals 210 of the neutral point bus bar 200 are arranged at an upper end of the core 110 so as to be distributed within 360 degrees around the circumference of the core 110, The lengths of the

bus bars

300, 400 and 500 of the neutral point terminals 210, U, V and W corresponding to the respective neutral bus bars 200 should be made to be approximately 360 degrees, It is possible to manufacture the neutral bus bar 200 and the U, V, and W

phase bus bars

300, 400, and 500 at a cost of manufacturing In the aspect of FIG.

2 is a schematic diagram showing an arrangement relationship between a coil and a bus bar connected to the core of the brushless motor of the present invention.

2, the neutral bus bar 200 is formed on one side of the upper end of the core 110 with respect to the center of the core 110, and the U, V, W

phase bus bars

300, 400, Shaped bus bar 200 and the neutral bus bar 200 so as not to contact the neutral bus bar 200 on the other end of the upper end of the stator 100 on which the neutral bus bar 200 is not mounted, The

bus bars

300, 400, and 500 correspond to each other.

The neutral bus bar 200 may have any shape formed to include all of the teeth 120.

In other words, it is preferable that each tooth 120 arranged in a semicircular arc or semicircular section is formed to have a shape that passes all in a linear shape.

When the number of terminals of the neutral bus bar 200 is six, five straight line sections are formed.

In other words, the upper end of the core 110 is divided into two spaces based on the center of the core 110 at the upper end of the core 110, the neutral bus bar 200 is mounted at one end, V, and W

phase bus bars

300, 400, and 500, respectively.

The

first terminals

310, 410, and 510 and the

second terminals

320, 420, and 520 are formed at both ends of the U, V, and W

phase bus bars

300, 400 and 500, respectively. When one of the U, V, and W

phase bus bars

300, 400, and 500 is disposed adjacent to one end of the neutral point bus bar 200 and arranged so as to sequentially project along the circumferential direction, The bus bars protruding at the end of the bus bars 300, 400 and 500 are arranged close to the other end of the neutral bus bar 200.

The number of the first and

second terminals

310, 410, 510, 320, 420, 520 formed on the U, V, W

phase bus bars

300, 400, It is preferable that the same number of neutral point terminals 210 be formed.

The coil 600 is connected to the teeth 120 of the core 110 so as to correspond to the neutral bus bar 200 and the U, V, W

phase bus bars

300, 400 and 500 as described later.

Fig. 3 is a first outline of a three-phase Y connection structure of a conventional brushless motor, Fig. 4 is a second implementation outline of a three-phase Y connection structure of a conventional brushless motor, Fig. 6 is a schematic diagram showing a U-phase wiring method according to a second embodiment of a three-phase Y wiring structure of a conventional brushless motor, Fig. 7 is a schematic diagram of a conventional brushless motor V, W phase wiring method according to the second embodiment of the three-phase Y wiring structure of FIG.

As shown in FIGS. 3 to 5, a three-phase Y connection of a brushless motor is generally made up of three phases Y, and a point at which the centers of the U, V, and W phases are connected is called a neutral point.

When the U, V, and W phases are arranged in a parallel structure, for the convenience of description, the respective connections are denoted by U1, U2, V1, V2, W1, and W3, and the neutral point is denoted by N.

Thus, the method of connecting the coil 600 to the teeth 120 of the core 110 has two types of connection structures.

6, the coil 600 is drawn out from the U1 terminal and starts at the end of the tooth 120 corresponding to the U1 terminal and is wound clockwise at least once toward the core 110 side The coil 600 wound by the number of times specified by the teeth 120 of the U1 terminal is wound on the tooth 120 corresponding to the neutral point N located in the counterclockwise direction with respect to the center of the core 110, .

At this time, the coil 600 contacts the neutral point N after starting from the end of the tooth 120 corresponding to the neutral point N and wound clockwise at least once toward the core 110 .

That is, the coil 110 drawn out from the U1 terminal is wound clockwise starting from the upper right end of the tooth 120 corresponding to the U1 terminal. After the coil 110 is wound a predetermined number of times, the coil 110 is wound on the neutral point N And is wound on the neutral point N located on the left side counterclockwise with respect to the center of the core 110 through the outer upper end of the tooth 120 after being wound a predetermined number of times in the clockwise direction from the upper right end of the corresponding tooth 120 The coils 600 are wound on the pair of teeth 120 without being intersected with each other.

8, the coil 600 is drawn out from the U2 terminal and starts at the end of the tooth 120 corresponding to the U2 terminal and is wound clockwise at least once toward the core 110 side, as shown in FIG. The coil 600 wound by the number of times specified by the teeth 120 of the U2 terminal is wound on the teeth 120 corresponding to the neutral point N located in the clockwise direction with respect to the center of the core 110 It will become cold.

That is, the coil 110 drawn out from the U2 terminal is wound clockwise starting from the upper right end of the tooth 120 corresponding to the U2 terminal. After the coil 110 is wound a predetermined number of times, the coil 110 is wound around the neutral point N And contacts the neutral point N on the right side in the clockwise direction with respect to the center of the core 110 through the outer upper end of the tooth 120, The coil 600 crosses at the time of withdrawing from the terminal U2 and at the neutral point N. [

Accordingly, in the related art, either the first wiring method or the second wiring method is selected to connect the coil 600, so that the wiring structure as shown in FIG. 7 is obtained.

FIG. 8 is a schematic diagram showing a U-phase coil wiring method according to a bus bar arrangement method of the present invention, and FIG. 9 is a U, V, W phase wiring method according to a bus bar arrangement method of the brushless motor of the present invention It is an overview.

As shown in FIGS. 8 to 9, by combining the two methods and connecting the coil 600, the neutral point N is collected on one side with respect to the center of the core 110, So that the structure can be simplified.

More specifically, twelve teeth 120 are formed in the core 110, and the twelve teeth 120 are numbered 1 to 12 in the clockwise direction.

Hereinafter, for convenience of explanation, the method of winding the coil is omitted, and the number of the neutral point corresponding to the U, V, and W phase numbers designated in each of them is indicated.

Thus, the coil of the W1 terminal is wound on the No. 1 tooth and the coil of the W1 terminal is wound so that the No. 10 tooth becomes the neutral point.

Wind the coil of the W2 terminal to the No. 4 tooth and wind the coil to which the coil of the W2 terminal is connected so that the No. 7 tooth becomes the neutral point.

Wind the coil of the V1 terminal on the No. 2 tooth and wind the coil of the V1 terminal coil so that the 11th tooth becomes the neutral point.

Wind the coil of the V2 terminal to the No. 5 tooth and wind the coil to which the coil of the V2 terminal is connected so that the No. 8 tooth becomes the neutral point.

Wind the coil of the U1 terminal on the No. 3 tooth and wind the coil of the U1 terminal coil so that the No. 12 tooth becomes the neutral point.

Wind the coil of the U2 terminal to the No. 6 tooth and wind the coil of the U2 terminal to make the No. 9 tooth become the neutral point.

As shown in FIG. 9, all the neutral points are arranged on the teeth formed on one side of the semi-circular arc with reference to the center of the core 110.

That is, the neutral points corresponding to the terminals U1, V1, and W1 are respectively positioned third in the counterclockwise direction, and the neutral points corresponding to the terminals U1, V1, and W1 are positioned third in the clockwise direction.

Claims

The stator 100 includes a hollow core 110 and a plurality of teeth 120 protruding from the inner circumference of the core 110 at a predetermined interval in the circumferential direction. In a brushless motor having a three-phase Y wiring structure including a bar 200 and U, V, and W phase bus bars 300, 400, and 500,

The neutral bus bar 200 is mounted on one side of the upper end of the core 110 along the circumference of the core 110. The U, V, W phase bus bars 300, 400, V, and W phase bus bars 300, 400, and 500, which are stacked on the other side of the upper end of the core 100 where the neutral bus bar 200 is not mounted, Is symmetrical with respect to the center of the core (110).
The method according to claim 1,

The first terminals 310, 410, 510 and the second terminals 320, 420, 520 are formed at both ends of the U, V, W phase bus bars 300, 400,

The U, V, and W phase bus bars 300, 400, and 500 may be disposed adjacent to one end of the neutral point bus bar 200, Wherein a bus bar protruding at the end of the bus bars (300, 400, 500) is arranged close to the other end of the neutral bus bar (200).
The method according to claim 1,

The neutral bus bar 200 is connected to the first and second terminals 310, 410, 510, 320, 420, 520 formed on the U, V, W phase bus bars 300, And a neutral point terminal (210) is formed on the bus bar.
The method of claim 3,

The neutral points corresponding to the terminals U1, V1 and W1 are respectively positioned third in the counterclockwise direction and the neutral points corresponding to the terminals U1, V1 and W1 are positioned third in the clockwise direction.

In the core 110, twelve teeth 120 are formed in total, twelve teeth 120 are numbered 1 to 12 in a clockwise direction,

Wind the coil of the W1 terminal to the No. 1 tooth, wind the coil to which the coil of the W1 terminal is connected so that the No. 10 tooth becomes the neutral point,

Wind the coil of the W2 terminal to the No. 4 tooth and wind the coil to which the coil of the W2 terminal is connected so that the No. 7 tooth becomes the neutral point,

Wind the coil of the V1 terminal to the No. 2 tooth, wind the coil to which the coil of the V1 terminal is connected so that the No. 11 tooth becomes the neutral point,

Wind the coil of the V2 terminal to the No. 5 tooth and wind the coil to which the coil of the V2 terminal is connected so that the No. 8 tooth becomes the neutral point,

The coil of the U1 terminal is wound on the No. 3 tooth and the coil connected to the coil of the U1 terminal is wound so that the No. 12 tooth becomes the neutral point,

Wherein the coil of the U2 terminal is wound on the No. 6 tooth and the coil of the U2 terminal is wound so that the No. 9 tooth becomes the neutral point.