KR900005757B1 - I-Phase Brushless Motor - Google Patents

Abstract

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Description

1 phase energized brushless motor

1 is a longitudinal cross-sectional view of an exemplary disc type brushless fan motor to which the present invention is applied.

2 is a perspective view of the case of the fan motor of FIG.

3 is a perspective view of a cap body with a fan of FIG.

4 is a perspective view of a plastic magnet plate-shaped electric body as a first embodiment of the present invention.

5 is a plan view of a print distribution pattern as an example formed on the lower surface of the electric body of FIG.

6 is a plan view of the electric body of FIG.

7 is a bottom view of the field magnet of 6 poles.

8 is an exploded view of a field magnet of 6 poles and an armature coil group.

9 is an exploded perspective view of a main part of a disc-shaped brushless motor that is energized by one phase as a second embodiment of the present invention.

10 is a longitudinal sectional view of FIG.

11 is a torque curve diagram of a disk-type brushless motor.

12 is an explanatory diagram of the relationship between the field magnet and the position detection coil.

13 is an energization control circuit as one embodiment.

14 is an exploded view and energization control circuit diagram of the field magnet, the position detection coil and the drive coil;

15 and 16 are principle explanatory diagrams.

17 is an explanatory diagram of a magnetic substrate used as a fifth embodiment of the present invention.

18 is a plan view of an armature coil having a magnet for magnet field repelling torque generation according to a sixth embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

FM: Disc-type brushless fan motor

1: Square case for disc type brushless fan motor

2: bearing bearing 3,4: bearing bearing

5: Rotating shaft 6: E-ring for preventing falling out

7: motor case 8: recess

9: air passage hole 10: stay

11-1: Positive Power Cord 11-2: Negative Power Cord

12: prop 13: plastic magnet plate electric itself

14: screw 15-1, 15-2: armature coil

16: stator yoke 17: printed circuit board

18: plastic magnet 19: print distribution pattern

20,21: perforation 22:

23: chip component 24: position detection element

25: first part 26: cap body with fan

27: fan 28: protrusion

29: rotor yoke 30,30 ': field magnet

31-1,31-2: Magnet part for field magnet suction and scaffold torque generation

32,32 ': energization control circuit

47: Disc type brushless motor

48: fixed substrate 49: stator yoke

50: axis number 51: air hole

52: printed circuit board 53: screw

54: half fixed resistance 55: rotor yoke

56: Stable point 57: Field magnet suction and rebound torque curve

58: Zero 59,59 ': Armature torque curve

60: synthetic torque curve 61: output voltage curve

62,62 ': energized wave form 65: magnetic substrate

66: magnetic closure 67: insulating layer

The present invention relates to a one-phase energized brushless motor capable of self-rotating in a predetermined direction even with one position detecting element.

Although the arrangement of the armature coils may be referred to as a two-phase motor with respect to the brushless motor that is energized in one phase, basically, since the energization method is a one-phase energization method, such a brushless motor is called a one-phase motor. proper. Academics also think this is correct.

One (single) phase (powered) brushless motor can be formed at low cost, for example, due to a shortage of one position detecting element, and thus is used in axial fan motors and the like.

Here, the brushless motor that is energized in one phase is generally used as a position detecting element using a magnetoelectric conversion element such as a Hall element or a Hall IC, or using a position detecting coil. The former is a rotor magnet (generally, Therefore, the magnetic field magnet is used in the following description, so that the magnetic pole of the electric pole is energized in a predetermined direction by detecting the magnetic pole of the N pole or the S pole of the rotor magnet). It is made to rotate in the direction.

On the other hand, in the brushless motor that is energized in a single phase using the latter position detecting coil, when the electric current is energized in the predetermined direction through the armature coil, the armature coil is energized to the armature coil at a position facing the field magnet. Since it is not known which direction the rotational torque occurs, it is not known in which direction the rotational torque is generated.

It is known that the brushless motor, which is energized in one phase using the two kinds of position detecting elements, has a drawback in that it cannot be operated in mode or magnetically.

For example, in a brushless motor that is energized in one phase using an electron rotating element, the rotating element, which is the position detecting element, sometimes detects an intermediate portion between the N pole and the S pole of the field magnet. Since there is no signal generation in which direction the current should be sent to the armature coil, it is impossible to energize the armature coil in a predetermined direction, and the brushless motor that is energized in the single phase cannot be operated automatically.

If the latter position detection coil is used. Since the position of the field magnet cannot be detected at start-up, it is impossible to determine in which direction to rotate, and when the armature coil is in a position that cannot contribute to torque generation, There is a drawback that you cannot.

As described above, even in the case of using the position detecting element, magnetic brushing may not be possible in the brushless motor that is energized in one phase.

Therefore, in a brushless motor that is energized in one phase, a magnetic resistance (reluctance) torque is generally generated by disposing a magnetic body such as an iron rod in a magnetic circuit so that the field magnet can be stopped at a position where the magnetic field can be automatically moved at the time of stopping. It is done.

Therefore, at start-up, a single-phase brushless motor that can be self-powered when it is energized is obtained.

Here, even when the position detecting coil is used as the position detecting element, even if the magnetizing torque can be used to move the magnet, the position of the field magnet cannot be determined. have.

In addition, even if a single-phase energized brushless using any position detecting element enables magnetism to be operated using the magnetoresistive torque, performance can be achieved when the relationship between the armature coil, the position detecting element and the magnetoresistive torque generating member is not properly disposed. This excellent single phase energized brushless motor cannot be obtained.

In the conventional one-phase energized brushless motor, the positional relationship was difficult to correct, and the cost was high, such as wasting assembly time adjustment time.

In addition, a brushless motor that is energized in one phase is generally used in a fan motor or the like unless it is formed at a low price. In particular, in a fan motor, it is necessary to rotate at a high speed in order to obtain a larger air flow, but as in the conventional case, the magnetoresistance The use of torque had a limit to the high speed rotation in terms of machine construction.

The present invention has been made in view of the circumstances, and it is possible to be able to autonomously move in a predetermined direction even when using any one of a rotation conversion element and a position detecting coil as a position detecting element, and without requiring any special difficult positioning or adjustment Field magnet suction and rebound torque of a certain size can be easily generated at a predetermined position, and high torque and high speed rotation can be obtained by using the field magnet suction and rebound torque which is larger than the conventional relactance coat. For example, it is an object of the present invention to obtain a brushless motor of a disk type and to obtain an easy-to-assemble and inexpensive one-phase energized brushless motor.

도의 개각폭 θ도에 있어서 계자마그넷 흡인·반발 토크를 발생시키는 것으로 자기동 할 수 있도록 된 1상 통전되는 브러시리스 모터를 제공하므로서 달성된다.An object of the present invention is to provide a magnetic field magnet having 2P (P is an integer of 1 or more) alternating mainly N, S magnetic poles of at least one concentric type on the fixed side facing the limiter magnet through the rotor. And a one-phase energized brushless motor that rotates in one direction by using field magnet suction and repelling torque, and having a position detecting element for detecting the position of the field magnet. Integrate and fix the plastic magnet and magnetize the magnetic pole of the N or S pole to the plastic magnet at an electric angle with respect to the direction of rotation of the field magnet

This is achieved by providing a one-phase energized brushless motor that can be magnetically driven by generating field magnet suction and rebound torque in the opening angle θ of the figure.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

1 is a one-phase disk type brushless fan motor having one position detecting element, two armature coils, and a six-pole field magnet using a disk type brushless motor of the present invention.

A rectangular case 1 (see FIG. 2) for a cap-shaped disc-shaped brushless fan motor formed in an axial direction, for example, made of plastic, forms a bearing holder 2 at the center thereof, and the bearing holder 2 is formed. The bearing shaft bearings 3 and 4 are formed in the upper and lower opening portions of the inner circumferential portion of the bearing holder 2.

By the shafts 3 and 4, the rotating shaft 5 is rotatably held in the center of the disk-shaped brushless fan motor FM main body.

A lowering prevention E ring 6 is attached to the lower portion of the rotary shaft 5.

Reference numeral 7 is a motor case formed integrally with the case 1 inside the case 1.

8 is a convex portion formed between the case 1 and the motor case 7, and an air passage hole 9 and a stay 10 are formed in the bottom of the concave portion 8.

11-1 and 11-2 are plus and minus power codes, respectively.

12 is a support which is formed integrally with the case 7, wherein the top of the support 12 is a non-magnetic screw 14 in which the plastic magnet plate-shaped electric body 13 (see FIG. 4), which has provided an energization control circuit, is made of nonmagnetic material. Are obsessed with.

The plastic magnet plate-shaped electric body 13 is formed in a disc shape by molding the stator yoke 16 and the printed circuit board 17 and the magnetic magnet coils 15-1 and 15-2 as shown in FIG. It is formed integrally.

The plastic magnet plate-shaped electric magnetic body 14 is a printed circuit board 17 having a printed power distribution pattern 19 as shown in FIG. 5, and a stator yoke 16 insulated from an upper surface thereof, in order from below. ) And the magnetic magnets 15-1 and 15-2 disposed thereon to the plastic magnet 18 through the plurality of perforations 20 formed in the printed board 17 and the perforations formed in the stator yoke 16. Integrate by molding.

In this case, in order to integrate more reliably, the outer peripheral parts of the stator yoke 16 and the printed board 17 are also molded with a plastic magnet.

4 and 6, reference numeral 22 denotes a recess formed in the plastic magnet 18. In the center of the recess 22, a screw hole formed on the top surface of the support 12 and the printed circuit board 17 are formed. And a perforation 21 substantially coinciding with the perforation formed in the stator yoke 16, and the plastic magnet plate-shaped electric body 13 can be fixed to the upper part of the support 12 by screws 14. .

On the lower surface of the printed circuit board 17 of the electric body 13, a chip component 23 constituting an energization control circuit is disposed, and is soldered and connected to a predetermined portion of the print distribution pattern 19.

An upper portion 25 for accommodating and placing the position detecting element 24 is formed on the battery body 13.

In this example, as the position detecting element 24, a magnetism conversion element such as a hall element or a hall IC is used. This position detection element 24 is connected to the print distribution pattern 19 by appropriate means.

The armature coils 15-1 and 15-2 are arranged in 180 degree symmetry as shown in FIGS. 4 and 6.

The stator armature is formed by these two armature coils 15-1 and 15-2. On the upper surface of the plastic magnet plate-shaped electric body 13, a cap body 26 with a fan made of flat plastic in the axial direction as in FIG. 3 is opposed.

27 is a fan which is integrally formed with this cap body 26 in the outer peripheral part of the cap body 26 with a fan.

A protruding portion 28 is integrally formed at the center of the inner surface of the cap body 26, and the upper end of the rotating shaft 5 is fixed to the protruding portion 28 so as to rotate integrally. An annular rotor yoke 29 is fixed to an inner surface portion of the cap body 26.

On the lower surface of the rotor yoke (29), an annular six-pole magnetic field magnet (30) having an alternating magnetic pole of N and S as shown in Fig. 7 is fixedly installed to face the plastic magnet plate-like electric body (13). have.

The armature coils 15-1 and 15-2 are wound around the magnetic conductors 15 of the magnetic field magnet 30 in a manner that the angles of the armature coils 15a-1 and 15a-20 to contribute to the generated torque are wound.

In addition, the field magnet 30 uses six poles, and the armature coils 15-1 and 15-2 are formed at an angle of 60 degrees from the radial conductor portions 15a-1 and 15a-2 to contribute to the generated torque. It is.

In addition, since the conductor portion 15b in the circumferential direction of the armature coils 15-1 and 15-2 does not contribute to the generated torque, even if the field magnet 30 having a radius as small as the width of the conductor portion 15b is used, It will be alright.

The position detecting element 24 may be disposed on the conductor portion 15a-1 or 15a-2 which will contribute to the generated torque in position. In this case, since the thickness increases by the element 24, the air gap increases between the field magnet 30 and the plastic magnet plate-shaped electric body 13, so that a large rotational torque cannot be obtained, and the excretion is very difficult, making it unsuitable for mass production. do.

Therefore, as will be described later, the position detecting element 24 is arranged at a position equal to the conductor portion 15a-1, which will contribute to one generation torque of the armature coil 15-1.

The position of the position detection element 24 will be described later in detail later.

Referring to FIG. 6, the two armature coils 15-1 and 15-2 are disposed symmetrically by 180 degrees in order to improve rotational balance and reduce rotational vibration.

Field magnet suction and rebound torque for field magnet suction and repulsion torque generation for N pole (or S pole) may be used for the plastic magnet 18 (see FIG. 4) of the upper surface of the electric body 13 using an appropriate magnetizer. The magnetizing portions 31-1 and 31-2 for generation are formed.

)폭만큼, 회전방향(화살표 A방향)에 대하여 앞의 위치로 계자마그넷 흡인·반발토크를 발생하는 위치에 형성하고 있다.Magnetizers 31-1 and 31-2 for field magnet suction and rebound torque generation are electric (?

By the width, it is formed in the position which generate | occur | produces a field magnet suction and repulsion torque in the position before a rotation direction (arrow A direction).

A more preferable position for forming the magnetizing portions 31-1 and 31-2 for field magnet suction and generating torque generation is the armature with respect to the rotational direction of the field magnet 30 (arrow A direction ... see Fig. 7). In the conductor portion 15a-2, which will contribute to the generated torque of the coils 15-1 and 15-2, approximately 45 degrees in the electrical angle and a quarter of the magnetic pole width (15 degrees) in the mechanical angle. It is the position of the plastic magnet plate-shaped electric body 13 itself.

Therefore, in this embodiment, field magnet attracting and repelling torque generating magnets 31-1 and 31-2 are formed at positions shown in FIGS. 4 and 6 to generate field magnet suction and repulsive torque, namely, Even if only one position detecting element 24 is provided, the rotor can be automatically moved.

That is, by forming magnets by the magnetizing parts 31-1 and 31-2, the position detecting element 30 can be attached to the magnetizing parts 31-1 and 31-2 to magnetically move the field magnet 30. The magnets 31-1 and 31-2 are magnetized at the above positions so that the position detecting element 24 stops at the position where the dead point is not detected. In addition, the single-coil one-phase disk-type brushless fan motor (FM) can be operated automatically. In this embodiment, the magnet magnet suction and rebound torque generating magnet parts 31-1 and 31-2 are formed at a position symmetrical to 180 degrees to allow the magnetic motion of the rotor to be further increased. One is enough even if it is one.

In addition, a magnet for magnet field suction and rebound torque generation for field magnet suction and rebound torque generation may be formed at a condition position equal to the above position.

For example, a magnet for magnet field repulsion repulsion torque generation may be formed on the generation torque of the armature coils 15-1 and 15-2 based on the conductor portion 15a-1 to contribute to the generation torque.

Next, the reason why the magnetizing portions 31-1 and 31-2 are formed at the above positions will be described.

The position where the maximum starting torque is generated is the position of the conductor portions 15a-1 and 15a-2 that will contribute to the generated torque of the armature coils 15-1 and 15-2.

Therefore, the landing portions 31-1 and 31-2 may be formed at this position. However, it is difficult to form the landing portions 31-1 and 31-2 at this position. Can not get

Therefore, the magnetizing parts 31-1 and 31-2 are positioned at the front positions by the above-described conditions in the conductor parts 15a-1 and 15a-2, which will contribute to the generated torque so that the field magnet 30 generates at least a maximum torque as long as it moves. To form.

This position is to ensure that the stop position of the field magnet 30 is always in the best starting position so that the magnetizing portion 31-1 or 31-2 is located at the magnetic pole center of the N pole or the S pole of the field magnet 30. Location.

The magnetizing portions 31-1 and 31-2 are appropriately formed as the center of the magnetic pole of the field magnet 30 and have a size that can always be stopped and can be easily started.

8 is a development view of the field magnet 30 and the armature coil group in a six-pole, 12-coil, single-phase brushless fan motor.

The terminals of the conductor portion 15a-2 to contribute to the generated torque of the armature coil 15-2 and the terminals of the conductor portion 15a-2 to contribute to the generated torque M of the armature coil 15-1 are commonly connected. The terminal of the conductor portion 15a-1, which will contribute to the generated torque of the coil 15-1, is connected to the connection point 35 between the collector of the transistor 33 and the collector of the transistor 34 in the energization control circuit 32. The terminal of the conductor portion 15a-1, which will contribute to the generated torque of the armature coil 15-2, is connected to the connection point 38 between the collector of the transistor 36 and the collector of the transistor 37.

The energization control circuit 32 is formed of one phase reciprocation energization control circuit.

Emitters of transistors 33 and 36 are connected to positive power supply terminals 39, respectively, and emitters of transistors 34 and 37 are connected to ground 40, respectively.

The power supply terminals and the output terminals 41-1 and 41-2 of the position detection element 24 are connected to the energization control circuit 32. As shown in FIG. Therefore, when the position detecting element 24 detects the N pole of the field magnet 30, the position detecting element 24 conducts the transistors 33 and 37 through the transistors 33 and 37 through the output terminal 41-1, and thus the electric coil 15. The current in the direction of arrow B flows to -1,15-2 to obtain a rotational force in a predetermined direction.

When the position detecting element 24 detects the S pole of the field magnet 30, the position detecting element 24 conducts the transistors 34 and 36 through the output terminal 40--2, and supplies the armature coils 15-1 and 15-2. A current in the opposite direction flows to obtain a rotational force in a predetermined direction.

Next, the placement position of the position detection element 24 will be described.

The position detecting element 24 is surrounded by the dotted lines of the conductor portion 15a-1 or 15a-2, which will contribute to the generated torque of the armature coil 15-1 (or 15-2) in FIGS. It is preferable to position at the position 42 (or 43, 45, 46) position, but for the reason described above it cannot be positioned at the position 42 (or 43, 45, 46) enclosed by the dotted line. Therefore, when the portion 42 is surrounded by the dotted line, the position detecting element 24 corresponds to the middle portion of the N pole 30a of the field magnet 30. Therefore, when the position equal to this is found, the N pole ( Corresponds to the dotted line 44 at the intermediate position generally at 30c).

Therefore, the position detecting element 24 is arranged at the position corresponding to the enclosing portion 44 by the dotted line.

That is, in this case, since it does not oppose the conductor part 15a-1 which will contribute to the generated torque of the armature coils 15-1 and 15-2, arrangement | positioning of the position detection element 24 becomes easy.

In addition, according to the abnormal conditions, the position detecting element 24 can be disposed at an optimum target position suitable for various designs.

In the second embodiment, as the position detecting element, the case where the position detecting coil is used and only a part of the armature coil is integrally mounted with the plastic magnet is illustrated.

FIG. 9 is an exploded perspective view of an essential part of the disc-shaped brushless motor 47 which is energized in one phase, and FIG. 10 is a longitudinal sectional view of an essential part of the disc-shaped brushless motor 47 in FIG.

The disc type brushless motor 47 is configured as follows.

The plate-shaped stator yoke 49 is fixedly mounted on the fixed substrate 48, and the shaft 50 is fixedly installed at the center of the stator yoke 49, and the printed board 52 having the center hole 51 is provided. The center of the perforation portion 51 and the center of the bearing 50 are arranged to be disposed on the stator yoke 49, and the printed board 52 and the fixed substrate 48 are integrated by the screw 53. .

The printed board 52 uses a long one so as to protrude from the brushless motor 47 portion, and the electrical parts constituting the energization control circuit 32 'are disposed on the protruding portion of the printed board 52.

tr is a transistor, d is a diode, R is a resistor, and 54 is a semi-fixed resistor.

The electrical components for the energization control circuit 32 'may be disposed on the surface of the printed circuit board 52 without the driving coil L ₂ and the position detecting coil L ₁ described later. 52), and a small disk-shaped brushless motor 47 can be constructed, which is preferable.

A printed wiring pattern (not shown) is formed on the bottom surface of the printed board 52.

The position detecting coil L ₁ and the driving coil L ₂ made of a fan-shaped hollow core coil are bonded to the eight-pole field magnet 30 'and the face of the printed circuit board 52 facing each other. 30 ') face to face.

The position detecting coil L ₁ and the driving coil L _{2 are} disposed at a position in phase, that is, a position on the surface of the printed circuit board 52 which is 180 degrees symmetrical.

Position detecting coil (L ₁₎ and the drive coils (L ₂₎ and but is formed to be of the same shape, position detecting coil (L ₁₎ is the drive coil by using the all thin line wire drive coil (L ₂₎ (L ₂ ) It is wound and formed more than qhek.

The position detecting coil L ₁ and the driving coil L _{2 each} have an open angle with the radial conductor portions L ₁ a and L ₂ b, L ₂ b and L ₂ a and L ₂ b. In other words, the magnetic field magnet 30 'has 8 poles, so that the coils L _{1 and} L ₂ have an opening angle of 45 degrees.

The radial conductor parts L ₁ a and L ₂ b of the position detecting coil L ₁ are conductor parts that will contribute to the maneuvering force, and the radial conductor parts 1 _{L 2} 1 and _{L of the} drive coil L ₂ are radial conductor parts. 2 _b ) is the conductor part that will contribute to the generated torque. In the conductor portion L ₂ b, the printed circuit board in the front position with respect to the rotation direction (arrow A direction) of the field magnet 30 by about a quarter magnetic pole width of the field magnet 30, that is, 11 · 25 degrees ( On the surface 52), magnetization portions 31-1 and 31-2 for magnet field suction and rebound torque generation are magnetized so as to face the N pole surface upward. The magnetic field magnet portions 31-1 and 31-2 for magnet field suction and rebound torque generation dispose the position detecting coil L ₁ and the driving coil L ₂ on the printed circuit board 52 as shown in FIG. And then formed on both sides of the radial conductor portions L ₁ a, L ₁ b, L ₂ a and L ₂ b of the coils L _{1 and} L ₂ by a plastic magnet 18 and at the same time It is integrated with (52).

The rotary shaft 5 is pivotally rotated by the bearing 50, and the rotary shaft 5 is fixed to the center of the rotor yoke 55 at its center and rotates integrally.

On the lower surface of the rotor yoke 55, an eight-pole annular field magnet 30 'in which the magnetic poles of N and S are alternately bonded is fixed to face the coils L _{1 and} L ₂ .

Preferred positions for forming the magnetoresistance magnetizing portions 31-1 and 31-2 have been described in the first embodiment, and thus the description thereof is omitted.

FIG. 11 shows the torque curve when the disc-shaped brushless motor 47 is used at the rated voltage. The repulsive torque of the field magnet 30 'and the field magnet hop, as shown in the torque curve of FIG. When the relationship is indicated, at the stable point 56, the field magnet suction / repulsion torque curve 57 breaks the zero point 58 in the upper right direction.

The zero point 58 is a so-called dead point, and about one quarter of the field magnet rotor 30 ', that is, 11 .25 degrees, is separated from the zero point 58 and the stable point 56.

Eight stable points 56 appear in one rotation.

Although the torque zero has a zero point 58 between the stable points 56 and 56, the zero point 58 is a so-called dead point, and in the present invention, magnetic field magnetization and repulsion torque are generated in this invention so that the torque becomes zero. Since the magnetic field is unstable, the magnetic field magnet 30 'is rotated in the S-pole direction of the magnetic field magnet 30' by the suction force of the magnetizing portions 31-1 and 31-2.

That is, the field magnet suction and repulsion torque curves 57 are shown for the eight-pole field magnet 30 'and the magnetized magnets 31-1 and 31-2 for stopping the magnet field setting position.

Next, the armature torque (electromagnetic torque) when the current flows through the drive coil L ₂ and the high system of rotation angle are armature torque curves as indicated by the numeral 59,59 '.

As described above, the zero point 58 of the curves 59 and 59 'has a field magnet suction / repulsion torque curve 57 on the right side (CW direction) which is smaller than the zero point.

When the current action by the position detection coil L ₁ and the energization control circuit 32 'is applied, it becomes the upper half of the armature torque curve 59, 59', and thus is combined with the field magnet suction and repulsion torque curve 57. In this case, a synthesized torque curve indicated by 60 is obtained. That is, dead spots disappear as described above, thereby enabling stable operation.

In addition, the field magnet suction and repulsion torque at the zero point 58 is one-half the armature torque. Therefore, the synthesized torque curve 60 becomes an extremely smooth waveform curve, so that the field magnet 30 'can rotate smoothly. As a result, a disc-shaped brushless motor 47 having excellent performance is obtained.

Claim 12 gives the relationship between the field magnet (30 ') and the position detecting coil (L _1).

As the field magnet 30 'is rotated in the direction of arrow A, the conductor parts L ₁ b and L ₁ a of the position detecting coil L ₁ pass through the boundary between the N pole and the S pole of the field magnet 30. a gameu, the electromotive force of the output voltage obtained by the position detecting coil (L ₁₎ is shown as in the FIG. 12 (b) the output voltage curve (61) represented by.

The output voltage indicated by this curve 61 can be used as a position detection signal of the disc-shaped brushless motor 47. Therefore, when the drive coil L ₂ is energized by the energization waveform 62 as shown in FIG. 12 (b), the disk-type brushless motor 47 does not have a rotor conversion element and the rotor (field magnet 36) It rotates in a predetermined direction.

In practice, the resistor R in the energization control circuit 32 'is selected so as to have a wider conduction waveform 62' wider than the conduction waveform 62, or the trimmer (Trimmer) using the semi-fixed resistor 54. )

FIG. 13 shows the energization control circuit 32 'used as an example, and FIG. 14 is a development view of the field magnet 30', the position detecting coil L ₁ and the driving coil L ₂ , It shows a connection diagram of the position coil (L _1), a drive coil (L ₂₎ and 13-degree energization control circuit 32 '.

Referring to FIGS. 13 and 14, the position detecting coil L ₁ and the driving coil L ₂ are disposed at the in-phase position by 180 degrees of symmetry.

The position detecting coil L ₁ and the driving coil L ₂ have the other conductor part L when one of the conductor parts L ₁ a and L ₂ a faces the N pole of the field magnet 30 ′. ₁ b and L ₂ b) face the S pole of the field magnet 30 '.

The terminal of the one conductor portion L ₁ a of the position detection coil L ₁ is connected to the negative power supply 40 'side, and the terminal of the one conductor portion L ₂ a of the drive coil L ₂ is NPN. It is connected to the collector of the type transistor Tr.

The terminal of the other conductor portion L ₁ b of the position detection coil L ₁ is connected to the base of the transistor tr at the terminal of the other conductor portion L ₂ b of the drive coil L ₂ , and the positive power supply terminal 39 is provided. It is connected to.

The emitter of the transistor Tr is connected to the negative power supply terminal 40 '. The diode D connects the anode to the emitter of the transistor tr, and connects the cathode 63 between the terminal of the other conductor portion L ₁ b of the position detection coil L ₁ and the base of the transistor Tr. ).

The resistor R is connected between the connection point 63 and the terminal of the other conductor portion L ₂ b of the drive coil L ₂ . In the case where the semi-fixed resistor 54 is used, it may be set at the position of the portion 64 surrounded by viscosity.

Since the disc-shaped brushless motor 47 of the present invention shown as the second embodiment is constituted as described above, the disc-shaped brushless motor 47 is for stopping the field magnet setting position at the time of stopping and at the time of starting. , and if the field magnet attracting resisting torque mounting portion (31'-20 for generating is opposite to the whole of the S-pole of the field magnet (30 ') and an intermediate portion in supplying current to the driving coil (L _2), the drive coils (L ₂ ) Is in a state where rotation torque can be generated.

Therefore, when power is supplied to the energization control circuit 32 'at the start-up, as shown in FIG. 13, current flows to the base of the transistor Tr by the bias resistor R, and h _FE is amplified by the transistor Tr. The collector current IB multiplied flows in the transistor tr.

Therefore, the magnetic force N is generated on the drive coil L ₂ , and the S pole of the field magnet 30 ′ is attached (see FIG. 15 (a)) to make the N pole of the field magnet 30 ° far away. Accordingly, the field magnet 30 is rotated in the direction of the arrow A.

The diode D prevents the voltage V _BE between the base and the emitter of the transistor Tr from becoming negative.

When the field magnet 30 'is rotated in the direction of arrow A, current IB in the direction of the arrow flows to the position detecting coil L ₁ as in FIG. 15 (b) to generate electromotive force.

Therefore, a current flows in the transistor Tr, and the rotational torque rises.

After the energization of the normal drive coil L ₂ , the field magnet 30 'is rotated so that the transistor Tr is turned on immediately.

When the field magnet 30 'is rotated and the field magnet 30' and the position detecting holding coil L ₁ and the driving coil L ₂ are in the same relationship as in Fig. 16 (a), the position detecting coil ( The electromotive force of L ₁ ) erases the bias current caused by the bias resistor (R). When the field magnet 30 'is rotated in the direction of the arrow A, the electromotive force of the position detecting coil L ₁ becomes negative, and as shown in Fig. 16B, the diode D and the position detecting coil ( Circulates between L ₁ ). In this state, since no current flows through the drive coil L ₂ , rotation torque is also not generated.

However, the field magnet 30 'continues to rotate in the direction of arrow A due to inertia.

In this way, the field magnet 30 'is magnetized and magnetized for generating the magnet magnetization and repulsion torque for the field magnet suction / torque generation and for stopping the field magnet setting position while the field magnet 30' continues to rotate by inertia. Apply effectively.

That is, since the magnets 31-1 and 31-2 for field magnet suction torque generation and field magnet setting position stop are magnets, field magnet suction and rebound torque are generated as described in FIG. The magnetized parts 31-1 and 31-2 face the N pole on the field magnet 30 ′ surface because they face the N pole or the S pole of the field magnet 30 ′ avoided. This is because the S pole of 30 ') is generally opposed to the middle and rotates in that direction. Therefore, when the field magnet 30 'is continued due to inertia, since the current flows in the driving coil L ₂ again as described above, rotation torque is generated.

Since the above operation is repeated, even if there is no rotation conversion element as the position detecting element, the disk-type brushless motor 47 can be rotated and rotated in a predetermined direction.

In order to stop the disc-shaped brushless motor 47, when the power supply is disconnected, the field magnet 30 'continues to rotate for a short time due to inertia, but gradually decreases the rotation speed for loss due to friction. S-pole of the field magnet 30 'is attracted by the magnets 31-1 and 31-2 for field magnet suction torque generation and the stop of the magnet set position, and the magnets 31-1 and 31-2. Stops at a stable stop point generally opposite the middle position of the S pole of the field magnet 30 '.

This stop point is a position where the rotor (field magnet 30 ') can move automatically as described above.

In the above embodiment, the magnet for magnetizing the field magnet setting position stops at a position slightly ahead of the rotation direction in the conductor portions L ₁ b and L ₂ b of the position detecting coil L ₁ and the driving coil L ₂ . 31-1, 31-2) are formed, but they may be formed at the same position as this position.

In addition, although the magnetizing parts 31-1 and 31-2 have shown the case where the N pole was toward the field magnet 30 'surface, you may arrange | position it toward S pole.

In the third embodiment, the second embodiment is the same, but particularly, the stator yokes 16 and 49 may be used.

For example, in the case of the first embodiment it is actually found in the experiment. For example, in the first embodiment, when the stator yoke 16 is formed to face the printed circuit board 17, a large magnetic flux can be obtained, but the output from the position detecting element 24 becomes a square wave, and the armature Since energization of a square wave is made to the coil 15, switching of an energization is abrupt, and audible auditory rotation sound is generated. Therefore, without using the stator yoke 16, the output of the position detecting element 24 can be made a sine wave, and the armature coil 15 can be subjected to a sine wave so as not to generate a large rotating sound. As there is no stator yoke, it is possible to obtain a large field, so the winding specification of the armature coil 15 is changed. Therefore, a low current supply is sufficient, and a disk type brushless fan motor (FM) with an increased rotational speed can be obtained. there was.

In addition, because there is no stator yoke, it was cheaper and easier to assemble.

In the fourth embodiment, an example in which neither the printed board nor the stator yoke is formed is shown.

This in the first embodiment molds the armature coils 15-1 and 15-2 with plastic magnets 18, insulates on one side, for example, and then prints the same as in FIG. 5 on that side. This is achieved by forming the power distribution pattern 19.

In the fifth embodiment, it is useful to use the magnetic substrate 65 combined with the stator yoke and the printed board as the electric coil excrement plate.

As shown in FIG. 17, the magnetic substrate 65 forms insulating layers 67 on both surfaces of the magnetic substrate 66, such as an iron plate (only one side), and prints on the insulating layer 67 surface. The power distribution pattern 19 is formed.

In the sixth embodiment, as shown in FIG. 18, the forward position toward the inversion direction (arrow A direction) of the radial conductor portions 15a-1 or / and 15a-2 to contribute to the generated torque of the armature coil 15 The plastic magnet 18 is integrally attached to the plastic magnet 18 only, and the magnet magnet portion of the magnet magnet suction and rebound torque generation magnetized in the plastic magnet 18 is magnetized.

In addition, in other embodiments, six poles and eight poles as field magnets are used, but not limited thereto, and 2P (P is a natural number of one or more) poles may be used. It may be done. Moreover, one or more armature coils may be used, and of course, the shape is not limited to the said Example, of course.

In addition, the present invention is not limited to a disc type brushless motor, but also applies to a cap type brushless motor. Therefore, the present invention is different from a simple magnetoresistive torque using only one magnetoelectric conversion element or a position detecting coil as a position detecting element. In the present invention, since the magnet magnet attracting and repelling torque generation magnetization part is provided, the magnet magnet is attracted to the magnet with the field magnet, and the field magnet is reliably stopped at the position where the motor can be self-moved when the motor is stopped.

In addition, when the motor is energized during start-up, the motor rotates by itself, but at the dead point position of the motor, the landing magnet for magnet field suction and rebound torque generation and the large repulsion torque by the field magnet are also instantaneously rotated to the position avoiding the dead point. In the position avoiding, the magnet magnets obtained by energizing the electric coil are applied to the magnet, and the magnetizing part for field magnet suction / repulsion torque generation and the magnet magnet for suction and repulsion are applied to each other, and the magnet magnet is applied in a predetermined direction. The high torque and high speed motor can be obtained by trying to rotate at high speed and with high force.

In addition, according to the magnet magnet attracting and repelling torque generation magnetizing portion used, one or more may be formed at an appropriate position, the size may be selected, or various kinds may be easily obtained by changing the strength of the magnet.

Therefore, when the present invention is applied to an ultra-small or large axial brushless motor, even if high torque, high speed rotation, and high wind volume are required, the specification can be sufficiently satisfied.

Moreover, there is no need for particularly difficult positioning and adjustment, and field magnet attraction and repulsion torque can be easily generated at a predetermined size at a predetermined position.

According to the field magnet suction and rebound torque generating member of the present invention, positioning and fixing of the armature coil and the armature coil distributor are very easy.

Therefore, there is an effect that it is easy to assemble, inexpensive and mass-produced one-phase brushless motor of one-phase energized excellent position detection element.

Claims (10)

One or more concentric electric coils (15) in fixed shafts facing through the pores with field magnets (2,30 ') having rotors of 2P (P is an integer of 1 or more) alternately with N and S poles (15) -1,15-2) and a position detecting element 24 for detecting the position of the field magnet, and in a one-phase energized brushless motor rotating in one direction by using the magnet magnet suction and repulsion torque, The armature coils 15-1 and 15-2 are molded with a plastic magnet 18 to be integrated, and the magnetic magnets of the N or S pole are magnetized to the plastic magnet 18. Electric angle with respect to the direction of rotation

A brushless motor that is energized in one phase, characterized in that the magnetic field can be magnetized by generating field magnet suction and repulsion torque in the opening angle θ of the figure. The magnetizers (31-1, 31-2) for generating field magnet suction and rebound torque for generating field magnet suction and rebound torque in plastic magnets are made of electric magnetic coils (15-1, 15-2). Conductors (15a-1, 15a-2) contributing to the generated torque of

Or about

A one-phase energized brushless motor, characterized in that formed at least one position at a front position or a position in phase with respect to the rotation direction of the rotor by the opening angle θ of the figure. 3. The magnet magnet (18) according to claim 2, wherein the one or more armature coils (15-1, 15-2) are mainly integrated with the plastic magnet (18) only at the front part with respect to the rotational direction of the rotor. A single-phase energized brushless motor, comprising magnetizing portions 31-1 and 31-2 for suction and rebound torque generation. 4. The brushless motor with a single phase conduction according to claim 3, wherein the armature coils 15-1 and 15-2 are molded into a plastic magnet 18 and formed on the electric magnet 13 on the plastic magnet plate. . 5. The brushless motor as claimed in claim 4, wherein the plastic magnet plate-shaped electric body (13) in which the armature coils (15-1, 15-2) are molded has a printed distribution pattern. 6. The brushless motor as claimed in claim 5, wherein the armature coil drain plate is integrally formed with a plastic magnet (18) integrally mounted with the armature coils (15-1, 15-2). The electric magnetic coil discharge plate is a brushless motor with a one-phase current, characterized in that the insulating layer 67 is formed on the surface of the magnetic substrate 65, the print distribution pattern 19 is formed on the insulating film surface. 7. The brushless motor as claimed in claim 6, wherein the armature coil excrement plate is a stator yoke (49) insulated at least on the face of the armature coil excretion. A printed circuit board (17) and a stator yoke (10) according to any one of claims 6, 8 or 9, by means of a plastic magnet (18) integrally mounted with the armature coils (15-1, 15-2). 16-phase brushless motor, characterized in that the integrated one. 7. The brushless motor as claimed in claim 6, wherein the armature coil discharge plate is a printed board (17).

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