KR20160010820A - Direct current motor without contacting power supplier - Google Patents

Direct current motor without contacting power supplier Download PDF

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Publication number
KR20160010820A
KR20160010820A KR1020140091169A KR20140091169A KR20160010820A KR 20160010820 A KR20160010820 A KR 20160010820A KR 1020140091169 A KR1020140091169 A KR 1020140091169A KR 20140091169 A KR20140091169 A KR 20140091169A KR 20160010820 A KR20160010820 A KR 20160010820A
Authority
KR
South Korea
Prior art keywords
stator
bldc motor
hall sensor
rotor
mounting portion
Prior art date
Application number
KR1020140091169A
Other languages
Korean (ko)
Inventor
김명호
Original Assignee
(주)티지티
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 (주)티지티 filed Critical (주)티지티
Priority to KR1020140091169A priority Critical patent/KR20160010820A/en
Publication of KR20160010820A publication Critical patent/KR20160010820A/en

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Classifications

    • 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
    • H02K1/14—Stator cores with salient poles
    • 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
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
    • 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

Abstract

The present invention relates to a direct current motor which does not require a contact electric supply body, and which is provided with a magnet on a rotor which rotates during driving. The BLDC motor includes a plurality of tooth- A stator provided so as to be provided with a groove or a hole shaped mounting portion on the side facing the rotor and a hall sensor inserted into the mounting portion of the stator and detecting the magnetic force of the magnet. Therefore, by fixing the hall sensor to the stator, it is possible to control the BLDC motor so that the BLDC motor has a certain characteristic, because there is no difference in the height or angle of the hall sensor according to the know-how of the designer, It is possible to minimize the change of the characteristic value of the BLDC motor and to secure a space required for the attachment of the Hall sensor, thereby contributing to the miniaturization of the BLDC motor, So that the loss of the magnetic force sensed by the hall sensor is reduced, and the BLDC motor is accurately controlled and the efficiency is increased.

Description

≪ Desc / Clms Page number 1 > Direct current motor without contacting supplier <

The present invention relates to a direct current motor which does not require a contact electric power supply. By fixing the hall sensor to the stator, it is possible to accurately fix the hall sensor to a desired position and prevent the position of the hall sensor from changing at the time of driving, And more particularly to a BLDC motor having a stator for increasing the speed of rotation.

 Generally, a motor is a device that obtains rotational power by converting electrical energy into mechanical energy, and is widely used not only for home electronic products but also for industrial devices. Among these motors, BLDC motors (brushless DC motors) are provided with an armature winding on a rotor and an armature winding on a stator, and determine the current direction of the winding by using a hall sensor and a photo diode, . In contrast to conventional induction motors and AC motors that use 3-phase or 4-phase inverters to change the direction of current, it is possible to easily switch from the internal drive, Is relatively high and can rotate at a high speed and can drive a coil current by a semiconductor element with a non-contact point so that its service life is very long and also noise and electronic noises are hardly generated, It has the advantage of being able to do. In particular, BLDC motors have been developed in various forms in recent years as reliability of hall sensors has been improved. A conventional BLDC motor will now be described with reference to the accompanying drawings.

FIG. 1 is a plan view showing a conventional BLDC motor, and FIG. 2 is a side view showing a main part of a conventional BLDC motor. The conventional BLDC motor 10 includes a stator 12 fixed to the inner circumferential surface of the casing 11 and wound with a coil 12a, a stator 12 disposed inside the stator 12, a rotor 13 to which a magnet (not shown) is fixed, and a hall sensor 15 for sensing the magnetic force of the magnet. The stator 12 is formed by laminating a plurality of thin silicon steel plates and a plurality of teeth 12b are provided at regular intervals along the inner circumferential surface and formed by the teeth 12b together with the teeth 12b An insulator 12d is provided to insulate the slot 12c from the coil 12a, and a rotor 13 is rotatably installed inside the rotor 13 with a gap therebetween. The rotor 13 is formed in a cylindrical shape by stacking a plurality of silicon steel plates in the same manner as the stator 12 and is fixed to the center through a rotating shaft 13a through a pipe. (Not shown) that generates torque by interaction with the outer circumferential surface are inserted and fixed at regular intervals along the outer circumferential surface. The hall sensor 15 detects the position of the rotor 13 by sensing the magnetic force of a magnet (not shown), and is installed on the PCB 16 provided below the stator 12. In such a conventional BLDC motor 10, the Hall sensor 15 senses the magnetic pole position of a magnet (not shown) provided on the rotor 13 and transmits the sensed value to a controller (not shown) A current in a specific direction is caused to flow through the coil 12a wound on the stator 12 so as to match the magnetic pole arrangement of the coil 12a. Therefore, by generating a magnetic force of polarity matching the direction of the current flow in the coil 12a of the stator 12, the magnetic force generated by the coil 12a of the stator 12 and the magnetic pole of the magnet cause the stator 12 and the rotor 13, and the rotor 13 rotates. However, in such a conventional BLDC motor 10, the hall sensor 15 is attached on the PCB 16 spaced from the stator 12 to sense the magnetic force of the magnet so that the position, i.e., the height or angle of the hall sensor 15 The characteristics of the BLDC motor 10 can not be precisely controlled and the efficiency of the BLDC motor 10 is reduced because the characteristics are not uniform due to differences in the know-how of the designer. In addition, it is difficult to attach the hall sensor 15 to the correct position on the PCB 16, and if the attachment portion is changed finely due to carelessness of the operator, the characteristic value of the BLDC motor 10 is greatly changed I had a problem. Further, it is necessary to secure a separate space for attaching the Hall sensor 15 on the PCB 16, which is a cause of difficulty in miniaturization of the BLDC motor 10. [ Even if the PCB 16 is not fixed at the correct position or the PCB 16 is fixed at the correct position during assembly, the position of the PCB 16 is changed due to vibration or the like when the BLDC motor 10 is driven. The position of the Hall sensor 15 is changed. This causes a change in the characteristics of the BLDC motor 10 as well as a reduction in the efficiency of the BLDC motor 10.

SUMMARY OF THE INVENTION It is an object of the present invention to fix a Hall sensor on a stator so that there is no difference in height or angle of a Hall sensor according to know-how of a designer so that a BLDC motor has a constant characteristic It is possible to minimize the change of the characteristic value of the BLDC motor and to secure the space required for attaching the hall sensor by eliminating the difference in the mounting position of the hall sensor according to the skill of the operator, And the position of the hall sensor is prevented from being changed due to the influence of the vibration during operation, thereby reducing the loss value of the magnetic force detected by the hall sensor, thereby improving the accurate control and efficiency of the BLDC motor. Is to provide a BLDC motor.

In order to achieve the above object, the present invention provides a BLDC motor in which a magnet is provided on a rotor that rotates during driving, wherein a plurality of teeth, which are fixed to the casing so as to have a gap with the rotor, And a hall sensor inserted in the mounting portion of the stator and detecting the magnetic force of the magnet.

The BLDC motor can be controlled so that the BLDC motor has a certain characteristic by fixing the hall sensor to the stator, so that there is no difference in the height or angle of the hall sensor according to the know-how of the designer, It is possible to minimize the change of the characteristic value of the BLDC motor and to save the space required for the attachment of the Hall sensor, thereby contributing to the miniaturization of the BLDC motor, It is possible to reduce the loss of the magnetic force sensed by the Hall sensor, thereby enabling precise control of the BLDC motor and increasing the efficiency. The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit and scope of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

1 is a plan view of a conventional BLDC motor,
FIG. 2 is a side view showing a main part of a conventional BLDC motor,
FIG. 3 is an exploded perspective view showing a main part of a BLDC motor having a stator made of a soft magnetic powder material according to a first embodiment of the present invention,
4 is a side cross-sectional view showing a substantial part of a BLDC motor having a stator made of a soft magnetic powder material according to a first embodiment of the present invention,
FIG. 5 is an exploded perspective view showing a main part of a BLDC motor having a stator made of a soft magnetic powder material according to a second embodiment of the present invention,
6 is a side cross-sectional view showing a substantial part of a BLDC motor having a stator made of a soft magnetic powder material according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the most preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. FIG. 3 is an exploded perspective view showing a main part of a BLDC motor having a stator according to a first embodiment of the present invention, and FIG. 4 is a cross-sectional view of a BLDC motor having a stator made of the soft magnetic powder material according to the first embodiment of the present invention. And Fig. As shown in the drawing, the BLDC motor having the stator according to the first embodiment of the present invention includes a stator 110, a stator 110, and a plurality of magnets And a Hall sensor 120 mounted on the mounting portion 111 of the stator 110. The stator 110 includes a rotor 13 (shown in Fig. The stator 110 is fixed to the inside of the casing 11 (shown in Fig. 1), and has a plurality of teeth 112 each of which is wound around the coil 12a (shown in Fig. 1) 13) (shown in Fig. 1). The stator 110 may have a structure in which a rotor is provided in the present embodiment, but the rotor 110 is formed along the outer circumferential surface of the rotor and the rotor is provided with a gap therebetween. The stator 110 is provided with a mounting portion 111 on the side facing the rotor 13 (shown in Fig. 1), that is, on the inner side in the present embodiment. The mounting portion 111 is formed in the shape of a closed one side in the present embodiment and the hole sensor 120 mounted on the inner side of the mounting portion 111 is formed to have a substantially rectangular shape in which the stator 110 is disposed so as to be as close as possible to the magnet Is preferably formed on the surface of the tooth 112 facing the rotor 13 (shown in Fig. 1). The mounting portion 111 is formed such that the electric wire 121 is inserted so that the electric wire 121 electrically connected to the hall sensor 120 when the hall sensor 120 is mounted does not interfere with the rotor 13 And a wire insertion groove 113 to be fixed is formed to extend from one side. The stator 110 is provided with a sensor protection housing 114 to which the hall sensor 120 is fitted in a mounting portion 111 to protect the hall sensor 120. [ The sensor protection housing 114 may be formed of an insulating material such as synthetic resin to prevent malfunction of the hall sensor 120 by insulating the hall sensor 120 from the stator 110, To reduce the transmission of vibration to the Hall sensor 120 in a state where the Hall sensor 120 is minimized. The sensor protection housing 114 is formed at one side thereof with a lead-out groove 115 for leading the wire 121 of the hall sensor 120 to the wire insertion groove 113. The stator 110 is fabricated by compression of a soft magnetic powder, wherein the soft magnetic powder is based on iron-based particles and each soft magnetic powder is coated to be electrically insulated. The stator 110 is provided with a molding space including a shape corresponding to the stator 110 in the compression molding machine so as to be compression-molded with the soft magnetic powder, compressing the soft space powder into a molding space and then compressing the soft space powder with a compression member such as a punch And is formed so as to have the mounting portion 111 and the wire insertion groove 113 as well as the tooth 112. At this time, the soft magnetic powder may contain a lubricant and / or a binder and may be compressed together. The stator 110 becomes a soft magnetic composite (SMC) having a three-dimensional shape by the compression process of the soft magnetic powder and has a higher degree of freedom than the conventional case using a silicon steel sheet So that it is possible to form the mounting portion 111 and the wire insertion groove 113, unlike the structure in which a plurality of silicon steel plates having the same shape are stacked in a large number. The hall sensor 120 is fitted in the sensor protection housing 114 and mounted on the mounting portion 111 of the stator 110 together with the sensor protection housing 114. The hall sensor 120 has a wire 121 such as a copper wire or the like that is insulated by a flexible PCB type or sheath for outputting a signal and the wire 121 is drawn out to one side to be connected to a lead- 2) of the rotor 13 (see FIG. 1) by sensing the magnetic force of a magnet (not shown) and being electrically connected to the PCB 16 (shown in FIG. 2) Thereby detecting the position. FIG. 5 is an exploded perspective view showing a main part of a BLDC motor having a stator made of a soft magnetic powder material according to a second embodiment of the present invention, FIG. 6 is a cross- Sectional view showing a substantial part of a BLDC motor having a stator manufactured. As shown in the drawing, the BLDC motor having the stator made of the soft magnetic powder material according to the second embodiment of the present invention has a stator, which is formed by compression of the soft magnetic powder so that the mounting portion 211 is provided, A rotor 13 (shown in FIG. 1) provided with a plurality of magnets (not shown) rotatably installed in the stator 210 with a gap therebetween, a mounting portion 211 of the stator 210, And a Hall sensor 220 mounted on the Hall sensor 220. Parts that are the same as those in the first embodiment will be omitted and differences will be described. The stator 210 is formed with a hole 211 in the form of a hole so as to penetrate outwardly from the tooth 212 on the surface facing the rotor 13 (shown in FIG. 1) And the electric wire 221 of the hall sensor 220 mounted on the mounting portion 211 is mounted to sense the magnetic force of the magnet (not shown) accurately so as not to interfere with the rotating rotor 13 (Shown in Fig. 2). The stator 210 is provided with a sensor protection housing 214 for protecting the hall sensor 220 on the mounting portion 211 and a wire 221 of the hall sensor 220 on the rear side of the sensor protection housing 214 Out hole 215 to be drawn out is formed. Unlike the conventional structure in which a plurality of silicon steel sheets having the same shape are stacked, the stator 210 is formed by compression of the soft magnetic powder to form the soft magnetic composite (SMC) This is the same as the previous embodiment. The operation of the BLDC motor having the stator made of the soft magnetic powder material having such a structure is as follows.

Unlike the structure in which the stator 110 and 210 are formed by compression of the soft magnetic powder, only the silicon steel sheet of the same shape as the conventional one is stacked. In the stator 110 and 210, a groove or a hole- 111, 211). Therefore, by mounting the hall sensors 120 and 220 on the mounting portions 111 and 211 of the stator 110 and 210 fixed to the casing 11 (shown in FIG. 1), a difference in height or angle of the hall sensors 120 and 220 The characteristics of the BLDC motor can be made constant. In addition, since the hall sensors 120 and 220 are installed in the mounting portions 111 and 211 formed in advance in the stator 110 and 210, a change in the position of the hall sensors 120 and 220 occurs according to skill of the operator as well as easy installation of the hall sensors 120 and 220 It is possible to minimize the change in the characteristic value of the BLDC motor and to secure a separate space required for attaching the hall sensors 120 and 220, which is helpful for miniaturization of the BLDC motor. By mounting the hall sensors 120 and 220 on the stator 110 and 210 which are firmly fixed with the rotor 13 (see FIG. 1) always kept in a constant gap, the Hall sensors 120 and 220 To reduce the loss value of the magnetic force sensed by the hall sensors 120 and 220, thereby enabling precise control of the BLDC motor and increasing the efficiency. Further, the sensor protection housings 114 and 214 protect the hall sensors 120 and 220 mounted on the mounting portions 111 and 211 from malfunction or severe impact.

110, 210:
111, 211:
112,212: Tooth
113: wire insertion groove
114,214: Sensor protection housing
115: withdrawal groove
120, 220: hall sensor
121,221: Wires
215: Draw-out hole

Claims (3)

A BLDC motor in which a magnet is mounted on a rotor that rotates when driven, is provided with a plurality of teeth that are fixed to a casing so as to have a gap with the rotor and on which a coil is wound, And a hall sensor inserted in the mounting portion of the stator and detecting the magnetic force of the magnet. The method according to claim 1,
Wherein the stator has the mount portion formed on the surface facing the rotor in the tooth
Wherein the stator has a stator. The method according to claim 1,
Wherein the stator further comprises a sensor protection housing that is mounted to the mounting portion with the hall sensor fitted thereinto.
KR1020140091169A 2014-07-18 2014-07-18 Direct current motor without contacting power supplier KR20160010820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140091169A KR20160010820A (en) 2014-07-18 2014-07-18 Direct current motor without contacting power supplier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140091169A KR20160010820A (en) 2014-07-18 2014-07-18 Direct current motor without contacting power supplier

Publications (1)

Publication Number Publication Date
KR20160010820A true KR20160010820A (en) 2016-01-28

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KR1020140091169A KR20160010820A (en) 2014-07-18 2014-07-18 Direct current motor without contacting power supplier

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180018285A (en) * 2016-08-11 2018-02-21 한온시스템 주식회사 Brushless direct current motor
WO2020126820A1 (en) * 2018-12-21 2020-06-25 Robert Bosch Gmbh Motor arrangement with sensor module
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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180018285A (en) * 2016-08-11 2018-02-21 한온시스템 주식회사 Brushless direct current motor
WO2020126820A1 (en) * 2018-12-21 2020-06-25 Robert Bosch Gmbh Motor arrangement with sensor module
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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