KR102040495B1 - Power converting device - Google Patents

Power converting device Download PDF

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Publication number
KR102040495B1
KR102040495B1 KR1020120126302A KR20120126302A KR102040495B1 KR 102040495 B1 KR102040495 B1 KR 102040495B1 KR 1020120126302 A KR1020120126302 A KR 1020120126302A KR 20120126302 A KR20120126302 A KR 20120126302A KR 102040495 B1 KR102040495 B1 KR 102040495B1
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KR
South Korea
Prior art keywords
rotor
housing
support plate
stator
magnet support
Prior art date
Application number
KR1020120126302A
Other languages
Korean (ko)
Other versions
KR20140059644A (en
Inventor
유현수
이병삼
Original Assignee
엘지이노텍 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020120126302A priority Critical patent/KR102040495B1/en
Publication of KR20140059644A publication Critical patent/KR20140059644A/en
Application granted granted Critical
Publication of KR102040495B1 publication Critical patent/KR102040495B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The present invention provides a housing, a stator fixedly coupled to an inner side of the housing and having a space therein, a rotor inserted into a space of the stator and a rotating shaft penetrated through a central portion thereof, and one surface closely contacting a lower end of the rotor. Including a lower magnet support plate; but, On the other side of the lower magnet support plate is formed a recess groove in the center is disclosed a power conversion device for a vehicle in which the locking jaw formed in the rotating shaft is accommodated in the recess groove.

Description

Power converter {POWER CONVERTING DEVICE}

The present invention relates to a power conversion device capable of operating as a starter motor or alternator of a vehicle.

In general, a vehicle is provided with a starter motor for driving the engine and an alternator for generating electricity using the rotational force of the engine.

In the starter motor, the ignition switch is connected to the power source of the battery by the driver's operation when the vehicle is started, and the driving force generated by supplying power to the start motor is rotated to start the engine.

In contrast, the alternator is connected to the driving unit of the engine and the rotor is rotated in a state in which a magnetic field is formed through the driving force of the engine to generate AC power, and the battery is charged using the stop value.

These starter motors and alternators are all composed of a stator and a rotor, so the structure is very similar, and depending on whether a force or a power is applied, the starter motor and the alternator can be operated as a generator or a motor.

In recent years, research on the BSG structure that can play the role of a starter motor and an alternator as one structure is active. In this case, since the output value is different depending on the size of the stator and the rotor, it is advantageous to make the size of the stator and the rotor as large as possible, but there is a problem that the size of the motor is limited and the size is limited.

The present invention provides a power converter capable of increasing the volume of the stator and the rotor while maintaining the appearance size by the compact structure.

Power conversion device according to the invention, the housing; A stator fixedly coupled to the inside of the housing and having a space formed therein; A rotor inserted into a space of the stirrup and coupled with a rotation shaft penetrated through a central portion thereof; And a lower magnet support plate in which one surface is in close contact with the lower end of the rotor, wherein the other side of the lower magnet support plate includes a concave groove formed at a center thereof so that a locking step formed in the rotation shaft is accommodated in the concave groove.

In the power converter according to the present invention, the lower magnet support plate may be formed in a disk shape, a plurality of escape grooves may be spaced apart from the edge of the other surface of the lower magnet support plate.

In the power converter according to the present invention, a through hole may be formed in the central portion of the concave groove.

In the power converter according to the present invention, a bearing guide for supporting a bearing formed on the upper portion of the rotating shaft is formed, the bearing guide may be fixed to the inner surface of the housing by bolts.

In the power converter according to the present invention, a groove corresponding to the head of the bolt may be formed on the inner surface of the bearing guide.

In the power converter according to the present invention, the head of the bolt may be formed to be narrower in the screw direction.

The power converter according to the present invention includes a connector portion disposed at a lower end of the housing and electrically connected to an external component, and the connector portion may have a cut-out portion formed at a portion adjacent to the engine of the vehicle.

The power converter according to the present invention may include a belt pulley coupled to the end of the rotating shaft.

According to the present invention, the compact structure increases the volume of the stator and the rotor, thereby improving the performance of the power converter.

In addition, the compact design makes it possible to replace the existing alternator.

1 is a cross-sectional view of a power conversion apparatus according to an embodiment of the present invention,
FIG. 2 is an enlarged view of portion A of FIG. 1;
3 is a perspective view of the lower magnet support plate of the present invention,
4 is an enlarged view of a portion B of FIG. 1,
5 is a comparative view for explaining the compact structure of the power converter according to an embodiment of the present invention,
6 is a result of measuring torque performance by applying current to a power converter according to a comparative example,
7 is a result of measuring torque performance by applying a current to the power conversion apparatus according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In the present invention, the terms "comprises" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

In addition, it is to be understood that the accompanying drawings in the present invention are shown to be enlarged or reduced for convenience of description.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the drawings. Like reference numerals designate like elements throughout, and duplicate descriptions thereof will be omitted.

1 is a cross-sectional view of a power conversion apparatus according to an embodiment of the present invention, Figure 2 is an enlarged view of a portion A of Figure 1, Figure 3 is a perspective view of the lower magnet support plate of the present invention, Figure 4 is B of Figure 1 It is a partial enlarged view.

Referring to FIG. 1, a power conversion apparatus according to the present invention includes a housing 100, a stator 200 fixedly coupled to an inside of the housing 100, and having a space therein, and a space portion of the stator 200. The rotor 300 is inserted and coupled to the rotating shaft 400 through a central portion thereof, and a lower magnet support plate 620 in which one surface is in close contact with the lower end of the rotor 300. Hereinafter, with reference to FIG. 1, a side closer to the poly 800 is defined as an upper side, and a side far from the poly is defined as a lower side.

The housing 100 is formed in a cylindrical shape to provide a space in which the stator 200 and the rotor 300 may be mounted. In this case, the shape or material of the housing 100 may be variously modified, but a metal material that can withstand high temperatures may be selected due to the characteristics of the housing 100.

The housing 100 may include an upper housing 110 and a lower housing 120, and is configured to shield the stator 200 and the rotor 300 from the outside by a combination thereof. In addition, a cooling structure (not shown) may be further included to easily discharge the internal heat. The cooling structure may be an air cooling structure or a water cooling structure, and the shape of the housing 100 may be appropriately modified according to the cooling structure.

The stator 200 is inserted into an inner space of the housing 100 and has a space formed therein. The stator 200 may be a fixed structure including a coil and a plurality of cores on which the coil is wound, and may be formed by stacking plate-shaped stator plates having the same shape to a predetermined height.

The rotor 300 is inserted into a space provided in the stator 200. Specifically, the rotor 300 may be formed by stacking a plurality of disk-shaped core plates. The plurality of magnets mounted on the rotor 300 may be disposed to face the stator 200, and the magnets may be inserted into and coupled to the rotor 300 through holes formed in the rotor 300.

The rotating shaft 400 is formed through the center of the rotor 300. Therefore, when the rotating shaft 400 rotates, the rotor 300 rotates along the axial direction, and conversely, when the rotor 300 rotates, the rotating shaft 400 may rotate along the axial direction. At this time, the rotating shaft 400 may be rotatably coupled to the housing 100 by a bearing.

An upper magnet support plate 610 and a lower magnet support plate 620 are closely disposed on upper and lower portions of the rotor 300, respectively. The support plates 610 and 620 are closely disposed on the upper and lower portions of the rotor 300 to prevent the magnet from being separated from the rotor 300 when the rotor 300 rotates at a high speed.

The resolver 700 is disposed on the rotation shaft 400 to detect a rotation angle of the rotation shaft 400 by detecting a position of the rotor 300 which is rotated together with the rotation shaft 400. Specifically, the resolver 700 includes a rotor resolver 710 and a stator resolver 720.

The belt pulley 800 is fastened by a nut to an upper end of the rotation shaft 400 rotatably supporting the rotor 300, and is configured to rotate the rotor 300 by being coupled to a belt moving in conjunction with engine power. In addition, it can also be configured to rotate external components (engines, etc.) by the rotation of the rotor 300. In general, a plurality of grooves 810 are provided on the outer circumferential surface of the belt pulley 800 so that a groove belt (not shown) may be fastened.

The connector unit 900 is disposed at the lower end of the housing 100 to electrically connect the external components and the power converter. In detail, the connector 900 may include a neutral point 920 in which the U-V terminal and the like are covered by a protective member. In addition, a component for supplying a direct current or a power supply to an external component may be disposed. In addition, the connector unit 900 may be configured such that the cut-out unit 910 is formed at a portion corresponding to the engine on which the power converter is mounted, so as to avoid interference with the engine as much as possible.

When the power converter according to the present invention operates as an alternator, the pulley 800 is rotated by driving the engine to rotate the rotor 300 to generate alternating current. The generated alternating current may be converted into direct current through a diode located in the connector unit 900 and supplied to an external component (such as a battery).

On the contrary, when the power converter according to the present invention operates as a starter motor, the pulley connected to the rotary shaft 400 of the rotor 300 while the rotor 300 is rotated by the current applied through the connector 900. The 800 may rotate to drive an external component (engine or the like).

2 and 3, the lower magnet support plate 620 has one surface 621 in close contact with the lower end of the rotor 300, and a concave groove 623 is formed in the center of the other surface 622 to form the rotating shaft 400. The engaging jaw 410 formed in the housing is accommodated. In the present exemplary embodiment, the locking jaw 410 is formed to protrude outward of the rotation shaft 400, but is not necessarily limited thereto, and may be concave inward of the rotation shaft 400. In addition, a through hole 624 to which the rotating shaft is coupled is formed in the center portion of the concave groove 623.

In addition, the other surface 622 of the lower magnet support plate is formed with a plurality of escape grooves 625 spaced apart along the circumference. If the mass of the rotor 300 is not symmetrically manufactured with respect to the rotational axis 400 due to assembly tolerances or the like, a problem arises in that the concentricity of the rotor 300 becomes poor during rotation, in which case a plurality of escape grooves The mass can be compensated by 625 to balance the rotation.

1 and 4, the upper bearing 520 includes a bearing guide 500 that is in close contact with the upper bearing 520, and the bearing guide 500 includes a bolt 510 on an inner surface of the housing 100. It is fixed by). At this time, the bolt 510 penetrates in the thickness direction of the bearing guide 500 and is screwed to the housing 100 to fix the bearing guide 500 to the inner wall of the housing 100. The head 511 of the bolt may be tapered so that the width thereof becomes narrower toward the thread line 512.

The bearing guide 500 has a groove 500a in which the head 511 of the bolt 510 is inserted in the thickness direction from the inner side thereof, so that the head 511 of the bolt 510 is connected to the bearing guide 500 at the time of screwing. It is configured to be inserted into).

5 is a comparative view for explaining a compact structure of the power converter according to an embodiment of the present invention. For comparison, a structure in which a conventional power converter and a power converter according to the present invention are respectively coupled to an engine will be described.

First, the lower support plate 20 of the conventional invention is formed in the shape of a plate of the same thickness as a whole is disposed on the upper end of the locking step 11, while the lower magnet support plate 620 according to the present invention is caught in the concave groove 623 As the jaw 410 is accommodated, it can be seen that the height is significantly lowered. That is, according to the power converter according to the present invention, since the additional space can be secured by the thickness d6 of the concave groove 623, the height of the stator 200 and the rotor 300 can be increased accordingly.

In addition, since the edge thickness d5 of the lower magnet support plate 620 of the present invention is the same as the thickness d4 of the lower magnet support plate 620 of the conventional invention, the escape groove 625 may be easily formed.

In the power converter according to the present invention, the head 511 of the bolt 510 is inserted into the bearing guide 500 of the upper bearing 510 so that the overall thickness d2 is thin, whereas in the conventional invention, the bearing guide 30 is provided. It can be seen that the head 41 of the bolt 40 protrudes to the outside of the thickness d1. Therefore, the present invention can secure the space as much as the head thickness (d3) of the bolt 510 can increase the height of the stator 200 and the rotor 300.

In addition, in the power converter according to the present invention, a part corresponding to the protruding region 1a of the engine 1 to be mounted is cut-out 910 so that the stator 200 and the rotor 300 are coupled to the engine. It can be seen that the length of can be formed higher.

By such a compact structure, the height and volume of the stator 200 and the rotor 300 of the power converter may be greatly increased, and the output value may be significantly improved.

6 is a result of measuring the torque performance by applying a current to the power converter according to the prior art, Figure 7 is a result of measuring the torque performance by applying a current to the power converter according to an embodiment of the present invention. to be.

Referring to Figure 6, it can be seen that the average torque is 48.68 [Nm] when a current of 150 (A) is applied to the power converter according to the conventional invention (structure illustrated in Figure 5). On the other hand, as a result of applying a current to the power converter according to an embodiment of the present invention, it can be seen that the average torque is 50.1 [Nm].

In addition, the power converter according to an embodiment of the present invention can be seen that the performance is much higher considering the application of a current of 119 (A) of less current.

As described above, it can be seen that, as described above, the power converter is compactly configured to increase the volume of the stator 200 and the rotor 300 by securing additional space.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the claims are also the scope of the present invention. It belongs to.

100: housing 200: stator
300: rotor 400: axis of rotation
500: bearing guide 510: bolt
520: upper bearing 610: upper magnet support plate
620: lower magnet support plate 623: concave groove
700: resolver 800: belt pulley
900: connector portion 910: cut-out portion

Claims (8)

housing;
A stator disposed inside the housing;
Rotor disposed inside the stator
A rotating shaft disposed inside the rotor;
An upper bearing and a lower bearing supporting the rotating shaft;
A lower magnet support plate disposed at the lower end of the rotor;
A bearing guide supporting a lower portion of the upper bearing;
A rotor resolver disposed on an outer circumferential surface of the rotating shaft; And
A stator resolver disposed in the housing;
The rotating shaft includes a locking projection protruding outward,
The lower magnet support plate includes a concave groove into which the locking jaw is inserted,
The bearing guide is fixed to the inner side of the housing by bolts,
And a groove corresponding to the head of the bolt is formed on the inner surface of the bearing guide.
The method of claim 1,
The lower magnet support plate is formed in a disc shape, the power conversion device for a vehicle formed with a plurality of escape grooves on the edge of the other surface of the lower magnet support plate.
The method of claim 1,
The power conversion device for a vehicle formed with a through hole in the center of the concave groove.
delete delete The method of claim 1,
The head of the bolt is a power conversion device for a vehicle is formed narrower in the direction of the screw line.
The method of claim 1,
A connector part disposed at a lower end of the housing and electrically connected to an external component;
And the connector portion is provided with a cut-out portion at a portion adjacent to the engine of the vehicle.
The method of claim 1,
Vehicle power converter including a belt pulley coupled to the end of the rotary shaft.
KR1020120126302A 2012-11-08 2012-11-08 Power converting device KR102040495B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120126302A KR102040495B1 (en) 2012-11-08 2012-11-08 Power converting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120126302A KR102040495B1 (en) 2012-11-08 2012-11-08 Power converting device

Publications (2)

Publication Number Publication Date
KR20140059644A KR20140059644A (en) 2014-05-16
KR102040495B1 true KR102040495B1 (en) 2019-11-05

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KR1020120126302A KR102040495B1 (en) 2012-11-08 2012-11-08 Power converting device

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101881036B1 (en) * 2017-11-03 2018-07-24 동아전기부품 주식회사 Belt driven starter generator device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005160153A (en) * 2003-11-21 2005-06-16 Toyota Motor Corp Motor
JP2005160196A (en) * 2003-11-25 2005-06-16 Matsushita Electric Works Ltd Brushless motor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100193430B1 (en) * 1996-11-13 1999-06-15 오상수 Permanent Magnet Synchronous Motor
KR19990077581A (en) * 1998-03-05 1999-10-25 가나이 쓰도무 Alternating current generator for use in vehicle
KR100292889B1 (en) * 1998-04-10 2001-06-15 이성재 Method for compensating wear of rolling bearing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005160153A (en) * 2003-11-21 2005-06-16 Toyota Motor Corp Motor
JP2005160196A (en) * 2003-11-25 2005-06-16 Matsushita Electric Works Ltd Brushless motor

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