KR20130061283A

KR20130061283A - Stator of eps motor

Info

Publication number: KR20130061283A
Application number: KR1020110127508A
Authority: KR
Inventors: 김병용
Original assignee: 엘지이노텍 주식회사
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2013-06-11

Abstract

PURPOSE: A stator of an electronic power steering system motor is provided to mount a terminal module to the busbar of a stator core at once, thereby reducing the number of assembly processes. CONSTITUTION: A stator core winds a coil. The stator core is equipped in a cylindrical shape. A bus bar(110) is connected with the coil to be electrified. The busbar is coupled to the upper side of stator core. A terminal module(200) is integrated with a terminal member(220).

Description

EPS motor stator {STATOR OF EPS MOTOR}

The present invention relates to a stator of an EPS motor.

In general, a steering device assisted by a separate power is used as a device to ensure the stability of steering of the vehicle. Conventionally, such an auxiliary steering device is used as a device using hydraulic pressure, but recently, an electric power steering system (Electronic Power Steering System) having low power loss and high accuracy is used.

The electric steering device (EPS) as described above drives the motor in an electronic control unit (ECU) according to the driving conditions sensed by the vehicle speed sensor, torque angle sensor, torque sensor, etc. to ensure turning stability and provide fast resilience. This allows the driver to drive safely.

In this EPS system, the motor assists the driver to operate the steering wheel for steering, so that the steering operation can be performed with less force. The motor uses a BLDC motor.

In general, the BLDC motor is coupled to the housing and the cover member to form an exterior of the motor, and a stator is provided on an inner circumferential surface of the housing, and the center of the stator is rotatable according to electromagnetic interaction with the stator. A rotor to be installed is provided. The rotor is rotatably supported by a rotating shaft, and a steering shaft of the vehicle is connected to an upper portion of the rotating shaft to provide power to assist steering as described above.

Meanwhile, the stator has a coil wound around a cylindrical stator core having a plurality of split cores coupled thereto, and the coil is electrically connected to the bus bar BUSBAR through a coil terminal.

The busbar is provided in a substantially ring shape and is coupled to an upper side of the stator core. The bus bar is formed of a resin material that is an insulator, and terminals connected to the coil terminal so as to conduct electricity are arranged at regular intervals in the circumferential direction.

On the other hand, the power applied to the coil terminal is generally applied to the power of three phases (U, V, W phase), the bus bar has a separate terminal member for each polarity so that each coil terminal can be connected at once Prepared. In this case, the terminal members are generally connected to the bus bar by welding in order to prevent a short, and then insert and couple an rubber insulator.

However, in order to connect the busbar and the terminal member through welding in this way, it is cumbersome to individually weld the terminal members separately provided for each polarity. There is a problem that can be lost or separated.

In addition, when fixing the terminal member for welding, the inclined terminal may be banded between the installation, and because the structure holding the individual terminal member is weak, due to the crimping force generated during welding There is a possibility of getting out of the right place.

It is an object of the present invention to provide a stator of an EPS motor having an improved structure so that a terminal member can be mounted at an accurate position at all times and the assembly process can be simplified.

The stator of the EPS motor according to the present invention includes: a stator core wound with a coil and provided in a cylindrical shape by combining a plurality of split cores; A bus bar electrically connected to the coil and coupled to an upper side of the stator core; And a terminal module coupled to the busbar and having a terminal member connected to a plurality of different polarities of power to form a body under an insulator.

The terminal module may include a plurality of terminal members formed of a conductive material; A connection part formed at one end of the terminal member and having a connection groove electrically connected to the bus bar; And an insulator provided with an insulating material and separating the plurality of terminal members by a predetermined distance.

The connection groove may be formed by bending the end of the terminal member.

The bus bar may further include a connection protrusion fitted to the connection groove at a position corresponding to the connection groove. In this case, the connecting protrusion may be welded in a state of being inserted into the connecting groove.

The insulator may be made of any one of synthetic resin, rubber, and urethane, and may be injection molded together with the plurality of terminal members.

It is preferable that a total of three said terminal members are provided and connected with the power supply of U, V, and W three phases, respectively.

According to the present invention as described above, since the terminal module is integrally formed and can be mounted on the busbar of the stator core at one time, and the insulator is integrally formed, there is no need to insulate each terminal member separately, The process can be simplified.

1 is a perspective view of a stator core of an EPS motor according to an embodiment of the present invention;
2 is an exploded perspective view of FIG. 1, and
3 is a perspective view illustrating the terminal module of FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 is a perspective view of a stator core of an EPS motor according to a preferred embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a perspective view of the terminal module of FIG. 1.

As shown, the stator of the EPS motor according to the present invention includes a stator core 100, a bus bar 110, and a terminal module 200.

The stator core 100 is provided with a cylindrical shape in which a plurality of split cores 101 are assembled. A coil 102 is wound around the stator core 100 through an insulator, and a cylindrical rotor (not shown) is rotatable by interaction with the stator core 100 in which a coil is wound around a space formed at the center thereof. Is installed.

The bus bar 110 is electrically connected to the coil 102 and is coupled to an upper side of the stator core 100. The bus bar 110 includes a plurality of terminals 111 connected to a plurality of coil terminals 103 that are electrically connected to the coil 102 to enable the coils 102 to be energized by a predetermined group. Tie them up so that they can be supplied with different polarities at once.

1 and 2, the bus bar 110 is provided in a shape corresponding to the upper surface of the stator core 100, and preferably provided in a ring shape having an empty center. The bus bar 110 may be formed by molding an insulating material such as a resin material in a state in which the terminals 111 of a metal material are electrically connected to each other.

The terminal module 200 includes a connection portion 210, a terminal member 220 and an insulator 230.

According to a preferred embodiment of the present invention, the connecting portion 210 and the terminal member 220 is formed of a plate-shaped body, it is preferably formed of a conductive metal material.

On the side facing the bus bar 110 of the connection portion 210, it is preferable that a connection groove 211 formed by partially bending the end of the connection portion 210 is provided, but is not limited thereto. It is formed of the same material as the member 220, it may be molded in a groove shape that can be connected to the connecting protrusion 112 to be described later, or it may be configured by welding a conductive material.

On the other hand, the bus bar 110 may further include a connection protrusion 112 that is fitted to the connection groove 211 at a position corresponding to the connection groove 211. In this case, the connection protrusion 112 may be welded in a state of being inserted into the connection groove 211, but is not limited thereto and may be press-fitted and fixed.

It is preferable that the terminal member 220 be provided in plural numbers. According to a preferred embodiment of the present invention, a total of three terminal members 220 are provided to receive three-phase power of U, V, and W. It is good.

The plurality of terminal members 220 may be formed to have a predetermined height, and all may be provided in the same shape. As shown in FIGS. 2 and 3, the terminal members 220 are disposed at the center. It may be provided in a symmetrical structure. On the other hand, as shown in Figure 3, the end of the terminal member 220, it is preferable that a through-hole 221 of a predetermined size is provided so that the coil for the power connection can be connected.

The insulator 230 is insert injection molded in a state in which the plurality of terminal members 220 are disposed in a mold. The insulator 230 may be made of any one of synthetic resin, rubber, and urethane, and may be injection molded together with the plurality of terminal members 220.

According to the present invention as described above, instead of the terminal members individually connected to the existing, a plurality of terminal members 220 together with the insulator 230, using a terminal module 200 is formed by insert injection molding into one body, once It is possible to connect the power supply of the three poles to the bus bar 110 only by the mounting process of, thereby simplifying the assembly process.

In addition, since the parts are managed by one component of the terminal module 200, it is possible to reduce the inventory of parts and reduce the number of assembly operations, and stably supply power without fear of changing or tilting the height of each terminal member during the assembly process. Terminal connection for authorization is possible. That is, since the connecting grooves 211 provided at the ends of the plurality of fixed terminal modules 200 may be combined with the connection protrusions 112 protruding from the bus bar 110 at once, and then welded at a time. There is no fear that each terminal member 220 may be tilted or repositioned during the welding process.

In the foregoing, the present invention has been described in detail based on the embodiments and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content of the following claims.

100; Stator core 101; Split core
102; Coil 103; Coil terminals
200; Terminal module 210; Connection
220; Terminal member 230; Insulator

Claims

A stator core wound with a coil and provided in a cylindrical shape by combining a plurality of split cores;
A bus bar electrically connected to the coil and coupled to an upper side of the stator core; And
And a terminal module coupled to the bus bar and having a terminal member connected to a plurality of different polarities of power to form a body under an insulator.

The method of claim 1, wherein the terminal module,
A plurality of terminal members formed of a conductive material;
A connection part formed at one end of the terminal member and having a connection groove electrically connected to the bus bar; And
And an insulator provided with an insulating material to space the plurality of terminal members at a predetermined distance.

The method of claim 2, wherein the connection groove,
The stator of the EPS motor, characterized in that formed by bending the end of the terminal member.

The method of claim 3, wherein the bus bar,
The stator of the EPS motor further comprises a connecting projection that is fitted to the connecting groove in a position corresponding to the connecting groove.

The method of claim 4, wherein the connecting projection,
Stator of the EPS motor is welded in the inserted state.

The method of claim 2, wherein the insulator is
The stator of the EPS motor is formed of any one of a synthetic resin, rubber, urethane, and injection-molded together with the plurality of terminal members.

The method of claim 2, wherein the terminal member,
The stator of the EPS motor is provided with a total of three, respectively connected to the power supply of the U, V, W three phases.