KR20150141355A - structure of rotor for motor - Google Patents

structure of rotor for motor Download PDF

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Publication number
KR20150141355A
KR20150141355A KR1020140069940A KR20140069940A KR20150141355A KR 20150141355 A KR20150141355 A KR 20150141355A KR 1020140069940 A KR1020140069940 A KR 1020140069940A KR 20140069940 A KR20140069940 A KR 20140069940A KR 20150141355 A KR20150141355 A KR 20150141355A
Authority
KR
South Korea
Prior art keywords
main body
magnet
sensor
power magnet
sensor plate
Prior art date
Application number
KR1020140069940A
Other languages
Korean (ko)
Inventor
백수황
김남규
한만승
홍성렬
Original Assignee
주식회사 현대케피코
주식회사 고아정공
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
Publication date
Application filed by 주식회사 현대케피코, 주식회사 고아정공 filed Critical 주식회사 현대케피코
Priority to KR1020140069940A priority Critical patent/KR20150141355A/en
Publication of KR20150141355A publication Critical patent/KR20150141355A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

The present invention relates to a structure of a rotor for a motor, and more specifically, to a structure of a rotor for a motor having a sensor magnet and a power magnet. According to the present invention, the structure of a rotor for a motor rotates relative to a stator, and comprises: a main body to rotate relative to the stator; a power magnet which is mounted in the main body, and generates a rotational force on the main body by interaction with a coil mounted on the stator; a sensor plate arranged on an upper portion of the main body; and a sensor magnet which is mounted in the sensor plate, and informs a position sensor of a position of the power magnet mounted in the main body. A seating hole into which the power magnet is inserted is formed in the main body and opened upwards. The sensor plate covers an upper portion of the seating hole when the sensor plate is mounted on the main body.

Description

[0001] STRUCTURE OF ROTOR FOR MOTOR [0002]

The present invention relates to a structure of a rotor for a motor, and more particularly to a structure of a rotor for a motor provided with a sensor magnet and a power magnet.

Generally, the motor is composed of a stationary stator and a rotating rotor.

One of the stator and the rotor is wound with a coil, and the other is made of a magnet.

Accordingly, when power is applied to the coil, the rotor rotates due to an interaction between an electric field generated in the coil and a magnetic field generated in the permanent magnet.

In the case of a BLDC motor, the coil constitutes a stator and the rotating rotor is constituted by a permanent magnet.

Generally, the rotor includes a power magnet for generating a rotational force in the main body by interaction between a main body rotating with respect to the stator, a coil mounted on the main body and the stator, And a sensor magnet mounted on the sensor plate and notifying the position sensor of the position of the power magnet mounted on the body.

In such a conventional rotor structure, a separate cover member is mounted on the upper surface of the main body to prevent the power magnet mounted on the main body from flowing out to the outside.

In addition, when the sensor plate is mounted on the main body, the position of the power magnet and the sensor magnet must be precisely adjusted. However, due to assembly tolerances and vibration occurring during assembly, the position of the power magnet and the sensor magnet are uniform The reliability of the product is deteriorated.

Published Japanese Patent Application No. 10-1999-0035260 (May 15, 1999) Published Patent Application No. 10-2004-0065529 (July 22, 2004)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to prevent the power magnet from being detached from the main body without a separate member covering the power magnet and to change the arrangement between the sensor magnet and the power magnet And to provide a structure of a rotor for a motor that can prevent the motor from being damaged.

In order to achieve the above object, a structure of a motor rotor according to the present invention is a structure of a motor rotor which rotates with respect to a stator, the motor rotor comprising: a main body rotating with respect to the stator; A power magnet mounted on the main body and generating a rotational force in the main body by interaction with a coil mounted on the stator; A sensor plate disposed at an upper portion of the body; And a sensor magnet mounted on the sensor plate and informing the position sensor of the position of the power magnet mounted on the main body, wherein an air hole through which the power magnet is inserted is formed upward in the main body, And the plate covers an upper portion of the air hole when the plate is coupled to the main body.

A flow prevention protrusion is protruded from a lower surface of the sensor plate. The flow prevention protrusion is inserted into the air hole to prevent the power magnet from flowing up and down in contact with the power magnet.

The length of the power magnet is smaller than the length of the mounting hole.

A mounting hole is formed on an upper surface of the main body, and a mounting protrusion is formed on a lower surface of the sensor plate to be inserted into the mounting hole.

According to the structure of the motor rotor of the present invention as described above, the following effects can be obtained.

The arrangement between the sensor magnet and the power magnet can be uniformly disposed at a predetermined position without changing the arrangement of the sensor magnet and the power magnet during the assembly between the sensor plate and the main body so that the reliability of the product can be improved and there is a problem in alignment between the sensor magnet and the power magnet Can be prevented.

In addition, since the sensor plate covers the air hole through which the power magnet is seated, it is possible to prevent the power magnet from being detached without a separate cover member, and the power magnet is moved by the flow prevention protrusion, Can be prevented.

1 is a perspective view of a rotor according to an embodiment of the present invention,
2 is an exploded perspective view of a rotor according to an embodiment of the present invention,
FIG. 3 is an exploded perspective view of the rotor according to the embodiment of the present invention,
4 is a cross-sectional view taken along the line A-A 'in Fig. 1,
5 is a cross-sectional structural view according to another embodiment of the present invention,

FIG. 1 is a perspective view of a rotor according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a rotor according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of a rotor according to an embodiment of the present invention, 4 is a cross-sectional structural view taken on line A-A 'in Fig.

The present invention relates to the structure of a rotor that rotates relative to a stator of a motor.

1 to 4, the structure of a motor rotor according to the present invention includes a main body 10, a power magnet 20, a sensor plate 30, and a sensor magnet 40.

The main body 10 is formed in a substantially cylindrical shape, and is disposed inside the stator (not shown) on which the coil is mounted and is rotated with respect to the stator.

To this end, a rotation shaft (not shown) is mounted at the center of the main body 10.

The power magnet 20 is mounted on the main body 10.

The power magnet 20 functions to generate a rotational force in the main body 10 by interaction with the coil mounted on the stator.

The power magnet 20 may be installed inside the main body 10, but the power magnet 20 is inserted into the main body 10 for convenience of manufacturing, It is preferable that the air hole 11 is opened upward.

The air hole 11 may be open only in the upward direction or may be opened in the vertical direction.

Therefore, after the body 10 is manufactured, the power magnet 20 is inserted into the air hole 11 to be mounted thereon.

At this time, it is preferable that the vertical length of the power magnet 20 is equal to or smaller than the vertical length of the deep hole 11.

When the air hole 11 is opened in both the up and down directions, a separate member is attached to the lower portion of the main body 10 to close it.

The sensor plate 30 is disposed at an upper portion of the main body 10.

The sensor plate 30 is preferably made of a non-magnetic material such as plastic, so that the magnetic force of the power magnet 20 minimizes an influence on the magnetic force of the sensor magnet 40.

The sensor magnet (40) includes a plurality of sensor magnets (40) mounted in the sensor plate (30).

When the sensor plate 30 is made of plastic, the sensor plate 30 allows the sensor magnet 40 to be disposed therein through insert injection.

The sensor magnet 40 informs a position sensor (not shown) such as a hall sensor of the position of the power magnet 20 mounted on the main body 10.

That is, the sensor magnet 40 is rotated synchronously with the power magnet 20 so that the position sensor can sense the position of the power magnet 20 by sensing the magnetic force of the sensor magnet 40 .

For this, the number of the sensor magnets 40 and the number of the power magnets 20 are preferably the same.

Since the sensor magnet 40 informs the position sensor of the position of the power magnet 20, the sensor magnet 40 and the power magnet 20 must be fixed to each other at an accurate position .

A mounting hole 12 is formed on the upper surface of the main body 10 and a mounting protrusion 32 inserted into the mounting hole 12 is formed on the lower surface of the sensor plate 30.

When the operator simply inserts the mounting protrusion 32 into the mounting hole 12 by the mounting protrusion 32 and the mounting hole 12 as described above, the sensor plate 30 and the power magnet 20 The position can be accurately arranged.

In particular, by inserting the mounting protrusion 32 into the mounting hole 12, the initial position of the sensor plate 30 with respect to the main body 10 can be determined more accurately and easily.

An adhesive or the like may be used as a method for coupling the mounting protrusion 32 to the mounting hole 12, but it is preferably forcedly press-fitted to be fixedly coupled.

For this purpose, the diameter of the mounting protrusion 32 is formed to be larger than the diameter of the mounting hole 12.

The sensor plate 30 covers an upper portion of the air hole 11 into which the power magnet 20 is inserted when the sensor plate 30 is coupled to the main body 10.

Therefore, it is not necessary to cover the upper part of the air hole 11 through a separate member, so that the number of parts can be reduced.

As described above, the power magnet 20 covers the upper portion of the air hole 11, so that the power magnet 20 disposed in the air hole 11 can be prevented from flowing out to the outside.

In addition, a flow prevention protrusion 31 inserted into the air hole 11 is protruded from the lower surface of the sensor plate 30.

The flow prevention protrusions 31 are inserted into the air hole 11 and contact the power magnet 20 to prevent the power magnet 20 from flowing up and down.

At this time, the upper and lower lengths of the power magnet 20 are set to be smaller than the vertical length of the deep hole 11.

The flow of the power magnet 20 in the up and down direction is blocked by the flow prevention protrusion 31 so that the vibration noise generated by the movement of the power magnet 20 in the inside air hole 11 is generated .

In addition, the flow prevention protrusions 31 may accurately position the sensor magnet 40 and the power magnet 20 together with the mounting protrusions 32.

Meanwhile, as shown in FIG. 5, the mounting protrusion 32 may be fixedly coupled to the mounting hole 12 through a rivet 50.

5 is a cross-sectional view according to another embodiment of the present invention.

As shown in FIG. 5, a through hole 33 communicating with the mounting hole 12 is formed in the mounting projection 32.

A rivet 50 is inserted into the through-hole 33 to fix the sensor plate 30 to the main body 10.

The mounting hole 12 includes a large diameter portion 13 having a large diameter and a small diameter portion 14 having a diameter smaller than that of the large diameter portion 13.

The mounting protrusion 32 is inserted into the small-diameter portion 14.

The rivet 50 has one end abutting against the upper surface of the sensor plate 30 and the other end resting against the step between the large diameter portion 13 and the small diameter portion 14, To the main body (10).

According to the structure of the motor rotor of the present invention as described above, the position of the sensor magnet (40) and the power magnet (20) can be uniformly arranged without changing their positions, It is possible to prevent a problem in alignment between the sensor magnet (40) and the power magnet (20) when assembled.

In addition, since the sensor plate 30 covers the air hole 11 in which the power magnet 20 is seated, the power magnet 20 can be prevented from being detached without a separate cover member, It is possible to prevent vibration of the power magnet 20 from flowing due to the vibration of the power magnet.

The structure of the motor rotor according to the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

10: main body, 11: opening in the air, 12: mounting hole, 13: large diameter portion, 14: small diameter portion,
20: Power magnet,
30: sensor plate, 31: flow prevention projection, 32: mounting projection, 33: through hole,
40: Sensor magnet,
50: Rivet,

Claims (4)

In a structure of a rotor for a motor that rotates with respect to a stator,
A main body rotating with respect to the stator;
A power magnet mounted on the main body and generating a rotational force in the main body by interaction with a coil mounted on the stator;
A sensor plate disposed at an upper portion of the body;
And a sensor magnet mounted on the sensor plate and informing the position sensor of the position of the power magnet mounted on the body,
Wherein the main body is formed with an air hole through which the power magnet is inserted upwardly,
Wherein the sensor plate covers an upper portion of the air hole when the sensor plate is coupled to the main body. The method according to claim 1,
A flow prevention protrusion is protruded from a lower surface of the sensor plate,
Wherein the flow prevention protrusion is inserted into the air hole and contacts the power magnet to prevent the power magnet from vertically flowing. The method of claim 2,
And the length of the power magnet is smaller than the length of the mounting hole. The method according to claim 1 or 2,
A mounting hole is formed on an upper surface of the main body,
Wherein a mounting protrusion is formed on a lower surface of the sensor plate so as to be inserted into the mounting hole.
KR1020140069940A 2014-06-10 2014-06-10 structure of rotor for motor KR20150141355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140069940A KR20150141355A (en) 2014-06-10 2014-06-10 structure of rotor for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140069940A KR20150141355A (en) 2014-06-10 2014-06-10 structure of rotor for motor

Publications (1)

Publication Number Publication Date
KR20150141355A true KR20150141355A (en) 2015-12-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140069940A KR20150141355A (en) 2014-06-10 2014-06-10 structure of rotor for motor

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111725950B (en) * 2020-07-14 2021-11-09 小狗电器互联网科技（北京）股份有限公司 Fan and dust collector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111725950B (en) * 2020-07-14 2021-11-09 小狗电器互联网科技（北京）股份有限公司 Fan and dust collector

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