KR101287357B1 - Motor - Google Patents

Abstract

The present invention relates to a motor, and more particularly, a rotor is a permanent magnet without a brush and a commutator, the field pole is arranged in a winding of a three-phase motor structure, and the position of the rotor is detected by a hall sensor or a photo sensor. The present invention relates to a brushless DC motor in which current flowing through a corresponding field coil is interrupted by a power element such as a field effect transistor (FET) to obtain rotational force through suction repulsion between a rotating magnet and a fixed coil. The present invention relates to a brushless motor in which a coil provided in the motor is wound in a bobbin without being wound around a core, and then housed in a core.
The present invention provides a motor, comprising: a coil (12) wound on a bobbin (11) in a ring shape and generating an electric field according to an alternating signal applied thereto; A ring-shaped core 13 which receives the bobbin 11 while being coupled symmetrically on both sides of the bobbin 11 and cross-generates the magnetic poles of the N pole and the S pole according to an alternating signal applied to the coil 12; A plurality of shielding pads (14) positioned between the cores (13) arranged adjacent to each other to shield an independent state of each core (13); A magnet (15) having a rotation shaft (15a) in the center and spaced at the center of the core (13) and the shielding pad (14) to rotate in response to the magnetic pole of the core (13); The core 13 and the shielding pad 14 are fixed to each other, and a motor housing 16 supporting both ends of the rotation shaft 15a of the magnet 15 in a rotatable state.
The present invention can easily provide a coil in the core by winding the coil in a ring-shaped bobbin and inserting it inside the core that is symmetrically coupled at both sides. In addition, the present invention provides a core in which the coil is embedded in the form of a slim ring, by providing a plurality of them in a shielded state (for example, three), while the size and weight are similar to the existing motor, the rotational output is significantly increased. You can.

Description

Motor {Motor}

The present invention relates to a motor, and more particularly, a rotor is a permanent magnet without a brush and a commutator, the field pole is arranged in a winding of a three-phase motor structure, and the position of the rotor is detected by a hall sensor or a photo sensor. The present invention relates to a brushless DC motor in which current flowing through a corresponding field coil is interrupted by a power element such as a field effect transistor (FET) to obtain rotational force through suction repulsion between a rotating magnet and a fixed coil. The present invention relates to a motor in which a coil provided in the motor is wound in a core after being wound in a bobbin without winding the core.

In general, BLDC motor is an abbreviation of Brushless DC motor, and has high efficiency and easy control, compared to other electric motors, and is currently used most widely to implement variable speed operation of a compressor / washer for a refrigerator / air conditioner.

In order to operate the brushless DC motor BLDC motor, it is necessary to control the magnetic flux of the stator to be electrically perpendicular to or at an arbitrary angle with the flux of the permanent magnet generated from the rotor. To this end, it is necessary to determine the switching state of the inverter switching elements so as to always detect where the rotor is located and determine the magnetic flux generation position of the stator according to the position of the rotor.

In other words, BLDC motor has rotor and permanent magnet without brush and commutator, and magnetic pole is arranged by winding of 3-phase motor structure.The rotor's position is detected by Hall sensor or photo sensor and flows to the corresponding field coil. It is a DC motor in which current is interrupted by a power element such as a FET (Field Effect Transistor) to induce suction repulsion between a rotating magnet and a fixed coil to rotate.

In order to detect the position of the rotor, a resolver, an encoder, a hall sensor, etc. may be used, but in the case of a refrigerator / air conditioner compressor, environmental factors such as temperature / pressure Since the sensor is difficult to use, the position of the rotor is detected from the voltage or current applied to the motor.

As described above, the BLDC motor can easily adjust the speed and torque simply by changing the time (phase difference) of the sensor signal angle-to-current interruption time of the basic driving circuit, and the commutator affects the service life due to wear due to mechanical friction. Because it does not use a brush and its life is semi-permanently and noise is low, but it is more expensive than a brush-type motor, a large motor is not developed and expensive, and it is difficult to replace or repair the whole in case of failure. There is this.

In addition, the conventional BLDC motor is provided with a core wound around the coil, there is a problem that the volume of the motor is large and heavy, and the work of winding the coil in the core is very troublesome and difficult.

The present invention created to solve the problems of the prior art as described above aims to provide a motor that can easily provide a coil in the core.

The present invention for achieving the above object in the motor, the coil 12 is wound on the bobbin (11) in the form of a ring, generating an electric field in accordance with the alternating signal applied; A ring-shaped core 13 which receives the bobbin 11 while being coupled symmetrically on both sides of the bobbin 11 and cross-generates the magnetic poles of the N pole and the S pole according to an alternating signal applied to the coil 12; A plurality of shielding pads (14) positioned between the cores (13) arranged adjacent to each other to shield an independent state of each core (13); A magnet (15) having a rotation shaft (15a) in the center and spaced at the center of the core (13) and the shielding pad (14) to rotate in response to the magnetic pole of the core (13); The core 13 and the shielding pad 14 are fixed to each other, and a motor housing 16 supporting both ends of the rotation shaft 15a of the magnet 15 in a rotatable state.

The present invention of the above-described problem solving means can be easily provided to the core by winding the coil in a ring-shaped bobbin and inserting it inside the core that is symmetrically coupled on both sides.

In addition, the present invention provides a core in which the coil is embedded in the form of a slim ring, by providing a plurality of them in a shielded state (for example, three), while the size and weight are similar to the existing motor, the rotational output is significantly increased. You can.

1 is a perspective view showing an appearance configuration according to an embodiment of the present invention.
Figure 2 is a side cross-sectional view specifically showing a coupling state of the configuration according to an embodiment of the present invention.
Figure 3 is a separation attempt showing more specifically the configuration according to an embodiment of the present invention.
Figure 4 is a separation attempt showing more specifically the configuration according to an embodiment of the present invention.
5 is a perspective view showing the configuration of a stator portion (coil and core) according to an embodiment of the present invention.
Figure 6 is an exploded perspective view showing in more detail the configuration of the stator portion (coil and core) according to an embodiment of the present invention.
Figure 7 is a front cross-sectional view showing the configuration and operation of the coupling state according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the present invention, as shown in the accompanying drawings, Figures 1 to 4, in the motor, a coil (12) wound around the bobbin (11) in the form of a ring to generate an electric field in accordance with the applied alternating signal; A ring-shaped core 13 which receives the bobbin 11 while being coupled symmetrically on both sides of the bobbin 11 and cross-generates the magnetic poles of the N pole and the S pole according to an alternating signal applied to the coil 12; A plurality of shielding pads (14) positioned between the cores (13) arranged adjacent to each other to shield an independent state of each core (13); A magnet (15) having a rotation shaft (15a) in the center and spaced at the center of the core (13) and the shielding pad (14) to rotate in response to the magnetic pole of the core (13); The core 13 and the shielding pad 14 are fixed to each other, and a motor housing 16 for supporting both ends of the rotating shaft 15a of the magnet 15 in a rotatable state.

Here, the bobbin 11 of the present invention may be a synthetic resin ring body having a flange.

Meanwhile, in the present invention, the coil 12 may be an enameled wire wound around the bobbin 11.

On the other hand, the core 13 of the present invention, as shown in the accompanying drawings, Figures 5 and 6, the cross-section is a "b" shaped ring body, the outer peripheral surface in the horizontal direction slots at a predetermined angle centered about the center (13a) is provided, the surface in the vertical direction is cut to have a gap with a predetermined angle is divided into a plurality of magnetic pole forming piece (13b) is provided, bobbin for each skipped tip of each of the magnetic pole forming piece (13b) The receiving piece 13c may be provided bent in the direction in which the 11 is located.

The core 13 may be symmetrically positioned in both directions so that the receiving piece 13c may be engaged with each other.

In this case, the predetermined angle at which the slot 13a of the core 13 is provided may be, for example, an angle of 15 degrees. In this case, 24 slots 13a are formed on the outer circumferential surface of the core 13, and the installation angles of the respective cores 13 arranged on the outside about the magnet 15 are 30 degrees, 60 degrees, or 90 degrees. It can be arranged in a sequential order, as shown in the diagram.

The slot 13a is coupled while the fixing member 16c (described in detail below), which is one of the elements constituting the motor housing 16, is fitted in four directions, so that each core 13 is displaced as described above. It is possible to maintain the arranged state (prevent rotation).

In addition, the shielding pad 14 of the present invention may be made of a non-ferrous metal plate of the ring shape.

In this case, grooves are formed in four directions on the outer circumference of the shielding pad 14, and the fixing member 16c constituting the motor housing 16 is fitted in four directions to be coupled and prevented from rotating. .

In addition, the shielding pad 14 may be interposed between the core 13 and the other core 13 to shield the cores 13 from each other, and the outer surface of the core 13 positioned at both ends. It may also be provided.

In the present invention, the magnet 15 may be a rotating body in which an arc-shaped magnet block body is arranged in a circular shape at intervals, and the rotation shaft 15a penetrates the center thereof.

At this time, the magnet 15 may be arranged in a circular form with four magnets in an arc shape at equal intervals.

In addition, the magnet 15 may be formed by magnetizing the "N" pole and the "S" pole at both ends of the rotation direction, respectively.

On the other hand, the motor housing 16 of the present invention includes a front housing (16a) of the planar body block for pulling out and supporting one end of the rotating shaft (15a) of the motor; A rear housing 16b of the planar block for supporting the other end of the rotating shaft 15a of the motor; It may be configured to include; a fixing member (16c) for crimping and fixing the core (13) assembly through the tightening fixing through the four corner portions of the front housing (16a) and the rear housing (16b).

At this time, the front housing (16a) is a rectangular planar block, a hole in which one end of the rotating shaft (15a) is formed in the center, the one side (inner side surface where the core 13 is located) The bearing may be provided.

In addition, the rear housing 16b is a circular planar body block, and a groove or a hole through which the other end of the rotating shaft 15a is inserted or penetrated is formed at the center thereof, and a bearing may be provided at the portion thereof.

In addition, the fixing member 16c may be a bolt and a nut.

Hereinafter, the operation of the present invention will be described.

First, the basic operating principle of the present invention will be described, and the following figure prepared for this shows the electrical configuration of the coil 12 corresponding to the stator part.

Typically, the motor 10, in particular a BLDC motor, consists of a stator consisting of a magnet rotor and a winding. By the relationship between the magnet rotor and the magnetic field generated from the winding to which the current is applied, electrical energy is converted into mechanical energy by rotating the rotor.

In the above figure, in case of the current flowing in the order of (A-a-com-b-B), the polarity of the corresponding stator is determined. For example, the north pole of a rotor of magnets 15 is located between the (A-a) stator and the (com-b) stator, and the S pole is located between the (b-B) stator and the (a-com) stator. Done.

Here, the current flowing through (A-a-com) and the current flowing through (com-b-B) are switched by MOSFET devices (eg BLDC motor) connected to the motor and supplied to A, B, and C. do.

The structure described above is a simple BLDC internal structure in which the internal rotor is composed of one N and S poles. If the rotor is 4 poles instead of 2 poles, then the number of stators around the interior is 12 instead of six. Then, when the phase of the current applied to the stator changes, it moves 30 degrees instead of 60 degrees.

Referring to the operation of the present invention with reference to this operation principle, the alternating signal, that is, the current is applied to the coil 12, as shown in the accompanying drawings, as shown in Figure 7, the N pole on the magnetic pole forming piece 13b of the core 13 And S-poles are alternately formed.

Then, the N pole of the magnet 15 located at the "N" pole portion of the core 13 repels and tries to move in the S pole direction of the core 13, and the magnet located at the S pole portion of the core 13. The S pole of (15) is also repulsed, and a rotational force is obtained by the force which moves to the N pole direction of the core 13.

Of course, the polarity of the coil 12 is reversed according to the direction of the current applied to the coil 12, so that forward / reverse rotation is possible.

The magnet 15 is rotated by the rotational force obtained in this way. At this time, a plurality of cores 13 are arranged adjacent to each other around the magnet 15, and the magnetic poles of the adjacent cores 13, that is, N The phases of the pole and the S pole are arranged to be shifted by a predetermined angle from each other, so that the magnets 15 are sequentially rotated in accordance with the flow of current.

At this time, in order to drive the motor 10, it is necessary to control the magnetic flux of the stator so as to be electrically perpendicular to or at an arbitrary angle with the flux of the magnet 15 that is the rotor. To this end, it is necessary to determine the switching state of the inverter switching elements so as to always detect where the rotor is located and determine the magnetic flux generation position of the stator according to the position of the rotor.

That is, the motor 10 of the present invention is a BLDC motor having a rotor and the magnet 15 without a brush and a commutator, and a field magnetic pole is a winding of a three-phase motor structure, and the rotor of the magnet 15 is a rotor. The position is detected by a Hall sensor or a photo sensor, and a current flowing through the corresponding coil 12 is interrupted by a power element such as a field effect transistor (FET), and suction repulsion is carried out between the magnet 15, which is a rotor, and the coil 12, which is a stator. Induced to rotate as described above.

In order to detect the position of the rotor, a resolver, an encoder, a hall sensor, or the like may be used, and the position of the rotor may be determined from a voltage or current applied to the motor 10. It can also be detected.

The motor as described above can simply adjust the speed and torque by simply changing the time (phase difference) of the sensor signal angle current interruption time of the basic driving circuit.

At this time, the high temperature is generated when the motor 10 is driven, the present invention is released through the outer surface of the motor housing 16, the heat generated is open, or heat exchange by circulating a fluid, such as oil through an internal circulation path It is also cooled through.

The motor 10 of the present invention as described above may be used as the motor itself to obtain a rotational force, but may also be used as a generator.

That is, when the magnet 15 is fixed and the coil 12 or the bobbin 11 wound around the coil 12 is rotated, a magnetic field change in the coil 12 occurs, and at both ends of the coil 12 at this time. Induced electromotive force is generated so that induced current flows to generate power. In this case, the above-described FET is turned off to recover and charge the generated energy.

To this end, the magnet 15 may be positioned and fixed to the bobbin 11, and the coil 12 may be wound around the rotating shaft 15a to rotate.

In particular, the motor 10 of the present invention is particularly useful as a driving device and a generator of an electric vehicle, which has recently exhibited a rapid technical growth. It can also be applied as needed to various fields throughout the industry.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

In addition, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

10: motor 11: bobbin
12 coil 13 core
13a: slot 13b: magnetic pole formation
13c: accommodation 14: shielding pad
15: magnet 15a: rotation axis
16: motor housing 16a: front housing
16b: rear housing 16c: fixing member

Claims (2)

A coil 12 wound around the bobbin 11 in a ring shape to generate an electric field according to an alternating signal applied thereto; A ring-shaped core 13 which receives the bobbin 11 while being coupled symmetrically on both sides of the bobbin 11 and cross-generates the magnetic poles of the N pole and the S pole according to an alternating signal applied to the coil 12; A plurality of shielding pads (14) positioned between the cores (13) arranged adjacent to each other to shield an independent state of each core (13); A magnet (15) having a rotation shaft (15a) in the center and spaced at the center of the core (13) and the shielding pad (14) to rotate in response to the magnetic pole of the core (13); A motor housing (16) for fixing the core (13) and the shielding pad (14) to support both ends of the rotating shaft (15a) of the magnet (15) in a rotatable state. The core 13 is a ring body having a cross-section "a" shape. The outer peripheral surface of the core 13 is provided with slots 13a at regular angles about the center, and the vertical surface has a gap with a predetermined angle. A plurality of magnetic pole forming pieces 13b are provided while being cut, and the receiving piece 13c is bent in a direction in which the bobbin 11 is positioned at each skipped tip of each of the magnetic pole forming pieces 13b. Motor characterized in that.

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