KR0163856B1 - Dc brushless motor - Google Patents
Dc brushless motor Download PDFInfo
- Publication number
- KR0163856B1 KR0163856B1 KR1019950012005A KR19950012005A KR0163856B1 KR 0163856 B1 KR0163856 B1 KR 0163856B1 KR 1019950012005 A KR1019950012005 A KR 1019950012005A KR 19950012005 A KR19950012005 A KR 19950012005A KR 0163856 B1 KR0163856 B1 KR 0163856B1
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- South Korea
- Prior art keywords
- magnet
- speed signal
- motor
- rotor yoke
- generating
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
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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
- H02K1/2793—Rotors axially facing stators
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- 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
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- 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
-
- 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
- H02K29/14—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with speed sensing devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/47—Air-gap windings, i.e. iron-free windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Brushless Motors (AREA)
Abstract
본 발명은 VCR용 캡스턴 전동기등에 사용되는 직류무정류자 전동기에 관한 것으로서, 고정자의 인쇄회로기판 상에 장착된 전기자코일과, 상기 전기자코일에 면대향하는 영구자석이 내주면에 부착된 회전자요크와, 상기 회전자요크의 외주면에 복수개의 N·S극이 교번착자된 속도신호발생용 자석과, 상기 속도신호발생용 자석에 면대향하며 속도신호를 감지하는 센서부와, 상기 센서부를 지지하는 홀더부의 상측에 상기 속도신호발생용 자석의 모서리부에서 발생되는 누설자속을 상쇄할 수 있도록 마그네트가 배설된 자기검출소자로 구성된 것을 특징으로 하는 것을 본 발명의 요지로 하며, 상기 자기검출소자 상측에 배설된 마그네트에 의해 회전속도 신호의 파형왜곡현상을 해소시켜 균일한 크기의 속도신호를 이용하여 회전속도를 제어하게 됨으로써 전동기의 회전정속성을 향상시키고 나아가 전동기의 효율저하를 방지할 수 있는 직류무정류자 전동기에 관한 것이다.The present invention relates to a DC non-rectifier motor for use in a capstan motor for VCR, etc., the rotor yoke mounted on the stator's printed circuit board, the permanent magnet facing the electric magnet coil on the inner circumferential surface, and the On the outer circumferential surface of the rotor yoke, a plurality of N and S poles alternately magnetized, a sensor for sensing the speed signal facing the speed signal generating magnet, and an upper portion of the holder for supporting the sensor. The gist of the present invention is characterized in that the magnet is provided with a magnet is disposed so as to cancel the leakage magnetic flux generated in the corner portion of the magnet for generating the speed signal, the magnet disposed above the magnetic detection element By solving the waveform distortion phenomenon of the rotational speed signal by using the speed signal of uniform size to control the rotational speed It relates to a DC-free commutator motor that can improve the rotational properties of the motor constant and further prevent the efficiency of the motor decreases.
Description
제1도(a)는 종래의 전동기의 내부구성을 발췌도시한 단면도.Figure 1 (a) is a cross-sectional view showing the internal configuration of a conventional electric motor.
(b)는 종래의 전동기의 회전속도 신호 파형을 나타낸 도면.(b) is a diagram showing a waveform signal of the rotational speed of a conventional electric motor.
제2도(a)는 본 발명에 의한 전동기의 내부구성을 발췌도시한 단면도.Figure 2 (a) is a cross-sectional view showing the internal configuration of the electric motor according to the present invention.
(b)는 본 발명에 의한 전동기의 회전속도 신호 파형을 나타낸 도면.(b) is a view showing a signal waveform of the rotational speed of the motor according to the present invention.
제3도는 본 발명에 의한 전동기의 회전에 따라 발생되는 자속의 분포를 나타낸 도면.3 is a diagram showing the distribution of magnetic flux generated by the rotation of the motor according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
40 : 회전자 42 : 회전자 요크40: rotor 42: rotor yoke
44 : 영구자석 46 : 속도신호 발생용자석44: permanent magnet 46: speed signal generating magnet
46a : 모서리부 60 : 고정자46a: corner portion 60: stator
62 : 인쇄회로기판 64 : 전기자코일62: printed circuit board 64: electric magnetic coil
80 : 자기검출소자 82 : 센서부80: magnetic detection element 82: sensor
84 : 홀더부 86 : 마그네트84: holder portion 86: magnet
본 발명은 VCR용 캡스턴 전동기등에 사용되는 직류무정류자 전동기에 관한 것으로서, 보다 상세하게는 자기 검출소자의 홀더 상측면에 마그네트를 배설시켜 속도신호발생용 자석의 모서리부에서 발생되는 누설자속을 제거하여 전동기의 회전 정속성을 향상시킬수 있는 직류무정류자 전동기에 관한 것이다.The present invention relates to a DC non-rectifier motor used in a capstan motor for VCR, and more particularly, by removing a magnetic flux generated at the edge of the magnet for speed signal by disposing a magnet on the upper surface of the holder of the magnetic detection element The present invention relates to a DC non-commutator motor capable of improving the rotational constant of the motor.
종래의 전동기는 제1도(a)에 도시된 바와같이, 회전자(10)와 고정자(20)로 구성되고, 상기 회전자(10)는 도시되지않은 회전축에 연결장착된 회전자요크(12)와, 상기 회전자요크(12)의 내·외주면에는 각각 N·S극이 복수개 교번착자된 영구자석(14) 및 속도신호발생용 자석(16)으로 구성된다.The conventional electric motor is composed of a rotor 10 and a stator 20, as shown in Figure 1 (a), the rotor 10 is connected to the rotor shaft (not shown) rotor yoke 12 ) And a permanent magnet 14 and a speed signal generating magnet 16 in which a plurality of N and S poles are alternately magnetized on the inner and outer circumferential surfaces of the rotor yoke 12, respectively.
그리고 상기 고정자(20)는 도시되지않은 베어링홀더에 장착된 인쇄회로기판(22)과, 상기 인쇄회로기판(22)상에는 상기 회전자(10)의 영구자석(14) 및 속도신호발생용 자석(16)과 면대향하여 고정설치되는 전기자코일(24) 및 자기검출소자(26)로 구성된다.The stator 20 includes a printed circuit board 22 mounted on a bearing holder (not shown), a permanent magnet 14 of the rotor 10 and a magnet for generating a speed signal on the printed circuit board 22. 16) and an armature coil 24 and a magnetic detection element 26 fixedly faced to each other.
상기 자기검출소자(26)는 속도신호발생용 자석(16)과 대향위치에 센서부(26a)와, 상기 센서부(26a)를 지지해주는 홀더부(26b)로 구성된다.The magnetic detection element 26 is composed of a sensor portion 26a at a position opposite to the speed signal generating magnet 16 and a holder portion 26b for supporting the sensor portion 26a.
이와같이 구성된 종래의 전동기는 상기 고정자(20)의 전기자코일(24)에 전원이 공급되면 회전자 요크(12)에 부착된 영구자석(14)의 누설 자속과의 상호작용으로 회전력이 발생된다.When the conventional electric motor configured as described above is supplied with electric power to the armature coil 24 of the stator 20, rotational force is generated by interaction with leakage magnetic flux of the permanent magnet 14 attached to the rotor yoke 12.
이때 속도신호발생용 자석(16)에서 발생되는 자속을 자기검출소자(26)의 센서부(26a)에서 감지하여 제1도(b)와 같이 전기적신호로 변환시켜 전동기의 회전속도를 제어하게 된다.At this time, the magnetic flux generated by the speed signal generating magnet 16 is sensed by the sensor unit 26a of the magnetic detection element 26 and converted into an electrical signal as shown in FIG. 1 (b) to control the rotational speed of the motor. .
그러나, 속도신호발생용 자석(16)의 모서리부(16a) 발생되는 누설자속이 자기검출소자(26)에 직접적인 영향을 미쳐 속도신호의 파형이 왜곡되어 속도제어가 용이하게 될 수 없어서 전동기의 회전이 균일하지 못한 문제점이 있었다.However, since the leakage magnetic flux generated at the corner portion 16a of the speed signal generating magnet 16 directly affects the magnetic detection element 26, the waveform of the speed signal is distorted, so that the speed control cannot be easily performed, thereby rotating the motor. There was this non-uniform problem.
따라서, 본 발명은 상술한 문제점을 해소하기위해 창안된 것으로서, 본 발명의 목적은 자기검출소자의 홀더부 상측면에 마그네트를 배설시켜 속도신호발생용 자석의 모서리부에서 발생되는 누설자속을 제거 할 수 있게 함으로써 속도신호를 균일하게 하여 전동기의 회전정속성을 향상시킬 수 있는 직류무정류자 전동기를 제공함에 있다.Therefore, the present invention was devised to solve the above-described problems, and an object of the present invention is to provide a magnet on the upper side of the holder part of the magnetic detection element to remove the leakage magnetic flux generated at the corner of the magnet for generating the speed signal. The present invention provides a direct current non-commutator motor that can improve the rotational constant of the motor by making the speed signal uniform.
이와같은 목적을 달성하기위한 본 발명에 의한 직류무정류자 전동기는, 고정자의 인쇄회로기판 상에 장착된 전기자코일과, 상기 전기자코일에 면대향하는 영구자석이 내주면에 부착된 회전자요크와, 상기 회전자요크의 외주면에 복수개의 N·S극이 교번착자된 속도신호발생용 자석과, 상기 속도신호발생용 자석에 면대향하며 속도신호룰 감지하는 센서부와, 상기 센서부를 지지하는 홀더부의 상측에 상기 속도신호발생용 자석의 모서리부에서 발생되는 누설자속을 상쇄할 수 있도록 마그네트가 배설된 자기검출소자로 구성된 것을 특징으로 한다.In order to achieve the above object, a direct current rectifier motor according to the present invention includes a rotor yoke mounted on an inner circumferential surface of an armature coil mounted on a stator's printed circuit board, and a permanent magnet facing the armature coil. A speed signal generating magnet in which a plurality of N · S poles are alternately magnetized on an outer circumferential surface of the electromagnetic yoke, a sensor unit facing the speed signal generating magnet and sensing a speed signal, and an upper portion of the holder unit supporting the sensor unit; Characterized in that the magnetic detection element is a magnet disposed so as to cancel the leakage magnetic flux generated at the corner of the magnet for the speed signal.
이하, 본 발명에 의한 전동기의 바람직한 일실시예를 첨부도면에 의해 상세히 설명한다.Hereinafter, a preferred embodiment of the electric motor according to the present invention will be described in detail by the accompanying drawings.
제2도(a)는 본 발명에 의한 전동기의 내부구성을 발췌도시한 도면이고, (b)는 회전속도 신호파형을 나타낸 도면이다.Figure 2 (a) is a view showing the internal configuration of the motor according to the present invention, (b) is a view showing the rotation speed signal waveform.
제2도(a)에 도시된 바와같이, 본 발명에 의한 전동기는 도시되지 않은 회전축을 중심으로 상하측에 배치된 회전자(40) 및 고정자(60)로 구성된다.As shown in Figure 2 (a), the electric motor according to the present invention is composed of a rotor 40 and a stator 60 disposed up and down about a rotating shaft (not shown).
상기 회전자(40)는 도시되지 않은 회전축에 연결장착된 회전자요크(42)와, 상기 회전자요크(42)의 내·외주면에 복수의 N·S극이 교번착자된 영구자석(44) 및 속도신호발생용 자석(46)으로 구성된다.The rotor 40 has a rotor yoke 42 connected to a rotating shaft (not shown) and a permanent magnet 44 alternately magnetized with a plurality of N-S poles on the inner and outer circumferential surfaces of the rotor yoke 42. And a magnet 46 for generating a speed signal.
상기 고정자(60)는 도시되지 않은 베어링 홀더에 장착된 인쇄회로기판(62)과, 상기 인쇄회로기판(62)상에는 상기 회전자(40)의 영구자석(44) 및 속도신호발생용 자석(46)과 각각 면대향 하도록 고정설치되는 전지자코일(64) 및 자기검출소자(80)로 구성된다.The stator 60 is a printed circuit board 62 mounted on a bearing holder (not shown), and a permanent magnet 44 of the rotor 40 and a speed signal generating magnet 46 on the printed circuit board 62. ) And the armature coil 64 and the magnetic detection element 80 fixedly installed to face each other.
상기 자기검출소자(80)는 상기 속도신호발생용 자석(46)으로부터 발생되는 자계의 변화를 감지하여 전기적 신호로 변환하는 센서부(82)와, 상기 센서부(82)를 지지하여 주는 홀더부(84)로 구성된다.The magnetic detection device 80 includes a sensor unit 82 that detects a change in the magnetic field generated from the speed signal generating magnet 46 and converts it into an electrical signal, and a holder unit which supports the sensor unit 82. It consists of 84.
상기 홀더부(84)의 상측에는 속도신호발생용 자석(46)의 모서리부(46a)에서 발생되는 누설자속을 상쇄시킬수 있는 마그네트(86)가 상기 모서리부(46a)보다 더높은 위치에 배설된다.On the upper side of the holder portion 84, a magnet 86 capable of canceling the leakage magnetic flux generated at the corner portion 46a of the speed signal generating magnet 46 is disposed at a higher position than the corner portion 46a. .
또한 상기 홀더부(84)의 내부에는 센서부(82)와 연결된 도시되지않은 입출력부 및 고정부로 구성된다.In addition, the inside of the holder portion 84 is composed of an input and output unit and a fixing unit (not shown) connected to the sensor unit 82.
이와같이 구성된 본 발명에의한 전동기는 고정자(60)의 전기자코일(64)에 전원이 공급되면 회전자(40)의 회전자요크(42)에 부착된 영구자석(44)의 누설자속과의 상호작용으로 플레밍의 왼손법칙에 의해 회전력이 발생되어 상기 회전자요크(42)가 회전하게 된다.When the electric motor according to the present invention configured as described above is supplied with electric power to the armature coil 64 of the stator 60, the electric motor and the leakage magnetic flux of the permanent magnet 44 attached to the rotor yoke 42 of the rotor 40 The rotational force is generated by the Fleming's left hand law to rotate the rotor yoke 42.
이때 제3도에서 나타낸 바와같이, 상기 회전자요크(42) 외주면에 장착된 속도신호발생용 자석(46)에서 발생되는 자속은 자기검출소자(80)의 센서부(82)에서 감지되고, 상기 속도신호발생용 자석(46)의 모서리부(46a)에서 발생되는 누설자속은 자기검출소자(80)의 홀더부(84) 상측에 배설된 마그네트(86)에 의해 상쇄되어 제2도(b)와 같이 균일한 회전속도신호로 변환함으로써 전동기의 회전을 일정하게 유지시킨다.In this case, as shown in FIG. 3, the magnetic flux generated by the speed signal generating magnet 46 mounted on the outer surface of the rotor yoke 42 is detected by the sensor unit 82 of the magnetic detection element 80. The leakage magnetic flux generated at the corner portion 46a of the speed signal generating magnet 46 is canceled by the magnet 86 disposed above the holder portion 84 of the magnetic detection element 80, and FIG. The rotation of the motor is kept constant by converting the signal into a uniform rotational speed signal as shown.
상술한 바와같이 본 발명에 의한 전동기는 자기검출소자 상측에 배설된 마그네트에 의해 회전속도 신호의 파형왜곡현상을 해소시켜 균일한 크기의 속도신호를 이용하여 회전속도를 제어하게 됨으로써 전동기의 회전정속성을 향상시키고 나아가 전동기의 효율저하를 방지할 수 있는 효과가 있다.As described above, the motor according to the present invention solves the waveform distortion phenomenon of the rotational speed signal by the magnet disposed on the upper side of the magnetic detection element, thereby controlling the rotational speed by using the speed signal of uniform size, thereby maintaining the rotational constant of the motor. In addition, there is an effect that can improve the efficiency and further reduce the efficiency of the motor.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950012005A KR0163856B1 (en) | 1995-05-15 | 1995-05-15 | Dc brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950012005A KR0163856B1 (en) | 1995-05-15 | 1995-05-15 | Dc brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960043433A KR960043433A (en) | 1996-12-23 |
| KR0163856B1 true KR0163856B1 (en) | 1999-04-15 |
Family
ID=19414523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950012005A KR0163856B1 (en) | 1995-05-15 | 1995-05-15 | Dc brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0163856B1 (en) |
-
1995
- 1995-05-15 KR KR1019950012005A patent/KR0163856B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR960043433A (en) | 1996-12-23 |
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