JPS60187251A - Disc-shaped brushless motor containing frequency generator - Google Patents

Abstract

PURPOSE:To readily and accurately magnetize poles for forming a frequency generator on the outer periphery of alternately magnetizing N- and S-poles on a circular magnet rotor which has an irregular surface at an equal interval on the outer periphery. CONSTITUTION:A disc-shaped magnet rotor 6 integrated with a rotational shaft made of a plastic magnet which has an irregular surface is formed. The rotor 6 is magnetized to axially form 2P (P is 2 or larger integer number) drive poles 6a to alternately have N- and S-poles circumferentially. Poles 6b for forming a frequency generator alternately having an equal interval pitch strongly magnetized N-poles at the projections and weakly magnetized N'-poles at the recesses by magnetizing the N-poles on the outer periphery of a plastic magnet having the irregular surface on the outer periphery on the outer periphery of a magnetic ring 7 are formed on the outer periphery of the drive poles 6a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc-type glassless e-van with a built-in frequency generator.

Conventionally, this type of frequency power generation N? As for the disk-type glassless e-tube with a built-in 4, a comb-like conductive pattern for forming a frequency generator is formed on the stator armature surface that faces the field magnet (driving ffl&) that constitutes the rotor. Install the printed circuit board.

It is known that a frequency generator is formed by the 47-volt pattern and a field magnet (magnet rotor). In addition, there is also a disc-type Graciles with built-in frequency generator [
- As a final step, the magnet rotor surface constituting the rotor is magnetized once again to form a frequency generator forming kl having N and S magnetic poles at fine equal pitches. A magnet rotor having a frequency detection magnetic pole and a driving magnetic pole is formed on the stator trL, which faces the driving magnetic pole of the magnet rotor.

A printed circuit board on which a comb-shaped conductive pattern for forming a frequency generator is formed is disposed at a position facing the magnetic head for forming the frequency generator described in item 7 above, and the conductive pattern and the above-mentioned frequency generator are formed. It has become.

The above is a typical example of a D, Suff type 7 Lasires e-U, which has a main frequency generator.

In the previous example, the frequency generated voltage generated when the radial line segments of the comb-shaped conductive pattern relatively pass through the boundary between the NQ and S poles of the magnet rotor is controlled at a constant speed. It is used for.

This device has the advantage of being mass-produced at low cost since it is not necessary to magnetize and form the troublesome magnetic poles for forming the frequency generator. However, because the number of line segments in the radial direction of the conductive pattern passing through the boundary between the Nti and S poles of the magnet rotor is small per rotation of the magnet rotor, only a small power generation frequency can be obtained. Because high frequency voltage cannot be obtained, the disc-type Gracilless C has a frequency generator that has good accuracy and can perform constant speed control.
- Has a deficiency that cannot be borrowed.

On the other hand, in the case of the disk-type glassless e-vehicle with rear #6 frequency generator Y11, the magnet rotor surface must be further magnetized to form a frequency generator, so the magnetization process is increased by one time. Therefore, it is inevitable that it will be expensive. However, although the magnetization process is increased by one step, since the frequency light is used to magnetize the magnetic poles for forming the core machine, the magnetization for forming the generator is performed by forming a large number of N and S at fine, evenly spaced pitches. Since the magnetic poles are formed, the line segments that contribute to the power generation of the conductive pattern are the frequency detection magnets (reverse N and S).
Since the number passing through the magnetic (-) boundary with the pole increases, more power generation frequencies (signals) can be obtained, and high frequency power generation pressure can be obtained, resulting in a constant speed with extremely high accuracy. It is desirable to configure a disk-type glassless e-vector with a frequency generator that can be controlled.In this case, the circumferential speed of the magnet rotor, which is one rotor, is faster at the outer periphery, so the driving magnetic pole or the frequency generator is used. It is better to print the comb-like conductive pattern, which is placed face-to-face with the magnetic pole for pattern formation, on the outer periphery of the IJ board surface to obtain a frequency power generation pressure with a larger amplitude, and to achieve a constant speed with higher accuracy. It is possible to construct a glassless e-controller capable of performing control.

Further, in a normal glassless e-tube, it is necessary to provide a one-position detection means because current must be passed in a predetermined direction to a predetermined armature coil depending on the position of the field magnet. In recent brushless electronic devices, magnetoelectric conversion elements such as Hall elements, Hall ICs, and magnetoresistive elements P are used as position detection elements. There are various methods for arranging the position detection 1: O element, but the one that uses the printed circuit board on which the comb-shaped conductive pattern is formed is the disk type glassless e-wavelength generator with a single frequency generator. It is desirable that it can be mass-produced at low cost. The location of the L.

Extremely high accuracy is required for positioning.
(h) The more the comb-like conductive pattern is provided on the outer circumference of the printed circuit board, the more accurate the positioning can be. As for the method of installing the position sensing element on the printed circuit board, in order to easily and accurately fix the position sensing element on the back side of the printed circuit board on which the conductive pattern h is formed, the position sensing element is placed on the printed circuit board for storing the position sensing element. It is possible to make a hole in the hole. However, since such a through hole must be formed on the surface of the printed circuit board that does not face the isoelectric pattern described in 1.1, it is usually necessary to form either the through hole or the conductive pattern on the inside.

If the Okagi Hidenden pattern is prioritized and formed on the outer periphery of the printed circuit board, it will be difficult to mass-produce it because it will be difficult to determine the position of one position sensing element, and the positioning accuracy will deteriorate, resulting in poor performance. In addition, priority was given to the through hole for storing the position sensing element, and the pu! J7) When formed on the outside of the i-plate, the amplitude of the frequency power generation output obtained from the comb-toothed isoelectric pattern becomes smaller, making it possible to create a disc type glassless e with a frequency power generator that can be accurately controlled at a constant speed. −
There was a flaw that made it impossible to complete the evening. In addition, the magnetic poles for forming the frequency generator are, for example, made of ferrite and placed in an annular magnet with 2p (p is a positive integer of 1 or more) in the thickness direction.
&) After magnetizing and forming other drive magnets, if you do not make the correct position 1a on the drive magnetic pole face and magnetize the magnetic Buddha for forming a 1-frequency generator, you will not be able to obtain a 1-frequency generator output. I couldn't do it.

Alternatively, there is still a lack of ability to obtain a disc-type blankless electronic device with a high-precision frequency generator.

Disc-type granless e- with conventional frequency generator
In the evening, one rotor (the magnetic rotor and the face-to-face T
One round eL on the stator armature surface located at the fixed side position 6ζ
A printed circuit board with a comb-like isoelectric pattern for forming several generators must be installed, and the air gap increases by the thickness of the printed circuit board, resulting in 1.
The disadvantage is that strong rotational torque cannot be obtained. ◎ The disc-type brushless six-wheel drive device incorporating a built-in frequency generator of the present invention was developed in view of the above circumstances, and it does not require troublesome positioning, and can easily be used with field magnets. It can be easily formed by adding magnetic poles for forming the same wave number generator on the outer periphery of the
In addition to obtaining high wave number power generation pressure with a large amplitude and achieving extremely precise constant speed control, the stator electric power generator installed at the fixed side 1δ facing the magnet rotor, and the frequency power generation ( The purpose of this design is to eliminate the need for a printed circuit board on which a comb-shaped conductive pattern is formed and to obtain a large rotational torque.

An object of the present invention is to form a disc-shaped or flat annular magnet rotor using a magnet such as a plastic magnet so that the outer periphery has unevenness at a finely spaced pitch, and to form a disc-shaped or flat annular magnet rotor with N and S magnets. Magnetized in the axial direction so that magnetic poles are alternately arranged around the circumference, and 2p (p is a positive integer greater than or equal to 2) is used for other drives! A frequency generator that has magnetic poles of strength N1 or sLa at fine equal pitches by magnetizing either N& or S& magnetic poles on the outer periphery of a magnet rotor that forms a pole and has irregularities as described. A stator armature is disposed on a fixed side facing the driving magnetic pole of the magnet rotor, and a frequency generator is arranged on the fixed side facing the forming magnetic pole similar to the frequency power generation of the seven-dannet rotor. This is achieved by providing a disk-type brushless electric motor incorporating a frequency generator provided with a comb-shaped conductive pattern for formation.

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

FIG. 1 shows a disk-type Graciles e-17.0 equipped with a built-in frequency generator as an example of the present invention. )Fa is a sectional view.

1 is a disc type brushless E- with a built-in frequency generator.
9% 2 is the casing of the disc-type Granless Date 1, which is made of a magnetic material.

6.4 is a bearing attached to the center of the casing 2l1li11, 5 is a rotating shaft rotatably supported by bearings 3 and 4, and 6 is a magnet rotor integrated into the rotating shaft 5 (field magnet ) constitutes a rotor together with the rotation shaft 5. After mounting the rotating shaft 5 of the magnet rotor 6I in an appropriate mold (not shown), a plastic magnet is injected into an appropriate mold in the same manner as the plastic creation molding means.
It is cooled and solidified and taken out from the mold to be integrated with the rotating shaft 5. As shown in Fig. 2, the magnet rotor 6 needs to be designed and placed in the mold so that its outer periphery has fine irregularities of 1 to 5 pitches. When the magnetic ring 7 is equipped and the plastic magnet injection molding means is ejected as described above, fine equal spaces Pf' are formed on the outer periphery via the magnetic ring 7.
A disc-shaped magnet rotor 6 is formed with five pitches, as shown in FIG. 2, which is integrated with a rotating shaft 5 made of a plastic magnet having unevenness. The magnet rotor 6 has magnetic poles of Il'J direction l, N and S alternately.
-6a is magnetized so that φm is one rjJ 1ko2p (p is a positive number of wheels of 2 or more) and the other drive -(-6a).

In this case, the drive magnetic pole 6a is magnetized into 4 other magnets having No. 5 (7J) magnets alternately. Outer periphery l
The outer periphery of the plastic magnet part, which has unevenness on the outer periphery, is coated with N (by magnetizing the bottle, strong N is applied to the protrusions).
Magnetic poles 6b for forming a frequency generator are formed by magnetizing, having 1 m magnetized portions and weak N' pole magnetized portions in the recessed portions alternately at fine equal pitches. The weak N′ other magnetized portion has the same effect as the S pole. Therefore, the outer part of the magnet rotor 6 has N,
The result is the same as forming magnetic poles for forming a frequency generator in which S fairx are alternately magnetized at fine equal pitches. still,
The outer periphery of the magnet rotor 6 having the above-mentioned unevenness may be magnetized with an S pole to form the frequency generating coin forming magnetic pole 6b. In this case, the S pole magnetized portion, which is strong on the convex portion In the four parts (weak S' and other magnetic parts are magnetized alternately at fine equal pitches, as a result, on the outer periphery of the magnet rotor 6, N and S magnetic poles are alternately arranged at evenly spaced intervals). The result is the same as forming magnetic poles for forming a frequency Wt electric machine magnetized at a pitch.In this way, in the present invention, since the unevenness is formed in advance on the outer n part of the magnet rotor at a fine evenly spaced pitch. , simply by magnetizing either the Nlk or the S pole on its outer periphery, the frequency detection magnetic poles can be regularly magnetized, so the position 1δ must be determined correctly as in the conventional method. This eliminates the troublesome process of mass production, making it extremely easy to mass-produce.Also, when forming one magnetic pole for frequency detection, in the past, N and S magnetic poles were magnetized at fine, evenly spaced pitches, which was complicated. Whereas an expensive magnetizing yoke must be used, according to the present invention, it is only necessary to magnetize either the N or S magnetic pole, so Toshihiro can use an inexpensive magnetizing yoke. Yes, if the magnet rotor 6 is not integrally formed with the rotating shaft 5 by injection molding means of plastic magnets, the magnet rotor 6 may be formed into an annular or disk shape (in this case, the center portion may be formed by an appropriate means). It is preferable to form a through hole in the rotor yoke and fix it to the lower surface of the rotor yoke which is attached to the one-rotation shaft 5.

The reason why the magnetic ring 7 is provided is that the strong magnetic flux kf of the magnetic pole 6b for forming the single-station wave number generator or the driving magnetic pole 6a is %3W.
This is to avoid receiving. Reference numeral 9 denotes a stator miss which is fixedly installed on the second surface of the casing that faces the driving magnetic pole 6a of the magnet rotor 6.
- The armature coils are formed by arranging three tenths of an armature coil at equal intervals on each side, each having a fan frame shape having a width substantially equal to the width of the armature coil. This is to provide an efficient three-phase disk-type glassless e-tube 1 using three armature coils 10. Reference numeral 11 denotes a magnetoelectric conversion element such as a Hall element or a Hall IC1 magnetoresistive element used as a position detection element, and one of each is disposed at an appropriate position in the cavity within the frame of each armature coil 11. 12 is a flexible belt-shaped blade.

It is fixed to the inner surface of the casing 2 facing the frequency generator forming magnetic pole 6b of the magnet rotor 6. Reference numeral 13 designates a comb-like conductive pattern formed into a flexible band 121 and a frequency generator.

13a is a power generation line element parallel to the rotation axis 5 that contributes to the power generation of the conductive pattern 16, and 13b and 13C are the power generation line elements of the conductive pattern 16.
This is the output terminal of The dλ electric pattern 16 is formed in a ring shape such that the pitch of the power generation line elements 13a is equal to the pitch of the magnets 4m6b for forming a one-frequency generator and has the same number as the magnets 1k 6 b. .

Therefore, J4 for forming the frequency generator of the magnet rotor 6
The magnetic flux density waveform 14 of the gap 8 formed by the groove 6b has an uneven waveform as shown in FIG. Therefore, the magnetic flux density waveform 14 formed by the one-frequency generator forming magnet 6b
By taking out the power generation frequency, the power generation frequency can be converted to power generation pressure using an F-V conversion circuit, and the voltage for speed control can be obtained. A power supply is inserted into the control circuit, and the magnetoelectric conversion element 11
is N4M or 8 of the driving magnetic pole 6a of the magnet rotor 6.
41, the energization control circuit operates based on the output of the electric converter 2 11 so that the magnet rotor obtains rotational torque in a predetermined direction and rotates in a predetermined direction. 10 is energized in a predetermined direction,
The magnet rotor 6 rotates in a predetermined direction. Also, when the magnet rotor 6 rotates, the magnet 66 for forming a one-frequency generator
Since the conductive turn 13 and the conductive turn 13 rotate relative to each other, the output terminals 13b and 13C of the conductive turn 13 provide a detection output with a frequency corresponding to the rotational speed. I mean.

Each power generation line element 13a group of 1 δ in the direction of the rotation axis of the conductive pattern 16 is 1, for example, a 1-frequency generator forming magnet h6bO)
When facing Nlk, the group of line elements 13a between these faces the R pole. As a result, an electromotive force is generated in each wire element 13a in the same direction according to the rotational speed of the frequency generator forming magnetic pole 6b, and the output terminal ISb of the conductive pattern 16, 13
A detection output of a frequency corresponding to the rotational speed of the rotor is obtained from C.

The pulsed magnetic flux generated by the single-frequency generator forming magnetic pole 6b appears intermittently, or since the conductive pattern 13 is formed around the entire circumference as shown in FIG. 2, the detection output is obtained as a continuous wave. Furthermore, even if there is pitch unevenness in the frequency generator forming magnetic poles 6b, the pitch unevenness is averaged out by the conductive pattern 16 having a plurality of groups of power generating line elements 13a, and when the rotational speed of the rotor is constant, a constant frequency detection output is generated. or can be obtained.

A variation in the rotor rotational speed is extracted as a frequency modulation component of the detection output.

Moreover, the rotation speed is 1-frequency generator forming magnet <Ti<
The magnet rotor 6 can be rotated at a constant rotation speed by feeding back a signal from the frequency generator formed by the conductive pattern 6b and the conductive pattern 13 to the rotation speed control circuit. 4゜As is clear from the above, the disk-type glassless e-tube with a built-in frequency generator of the present invention does not require an expensive magnetizing yoke or troublesome positioning, and can be operated very easily and accurately. Because magnetization can be formed on the outer periphery of the magnetic pole for forming a frequency generator.

The magnetic pole for forming the frequency generator can be formed very easily, and a large amplitude can be obtained between the magnetic pole and the comb-like conductive pattern for forming the frequency generator that opposes it. As a result, high frequency power generation pressure can be obtained. Because of this, it is possible to incorporate a frequency generator at low cost (with good accuracy without taking up much space). In addition, there is no need to install a printed circuit board with a comb-shaped conductive pattern for forming a single-frequency generator on the armature surface of the stay and the armature, which are located on the fixed side facing the magnet rotor. Don't increase it, I 5♂! This has the effect of making it possible to create a frequency generator that generates a large rotational torque with just a small amount of O.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a disc-type brushless motor that uses frequency power generation + geometrical inner J as an embodiment of the present invention, and Fig. 2 shows the magnetic rotor shown in Fig. Part 44, Figure 3, which shows the correspondence with the city pattern, is the flux waveform of the nitrogen gap formed by the magnetic poles for forming the frequency generator of the magnet rotor. Patent applicant Brother Industries, Ltd. Representative Director Katsuji Kawa;

Claims (6)

[Claims] (1) Form a disc-shaped or flat annular magnet rotor using a magnet such as a plastic magnet so that the outer periphery has unevenness at a fine, evenly spaced pitch, and attach N, 5I7) magnetic poles to the magnet rotor in the circumferential direction. 2p (p is a positive integer of 2 or more) polar driving magnetic poles are formed by magnetizing in the axial direction so as to alternately have the above-mentioned unevenness, and either an N pole or an S pole is formed on the outer periphery of the magnet rotor having the above-mentioned unevenness. By magnetizing one of the magnetic poles, a magnetic pole for forming a frequency generator having strong and weak N-color or S-pole magnetic poles at a finely evenly spaced pitch is formed, and the fixed side position faces the driving magnetic pole of the magnet rotor. A frequency power generator characterized in that a stator armature is disposed on the magnet rotor, and a comb-like conductive pattern for forming a frequency generator is provided at a fixed side position opposite to the magnet for forming a frequency generator (-) of the magnet rotor. Disc-type brushless with built-in machine [-Yu. (2) The magnet rotor is characterized in that the magnet rotor is formed by an e-rud through an Icl1Fi ring between the driving magnetic pole and the frequency generator forming magnetic pole. A disc-type brushless motor with a built-in frequency generator. (3) The frequency power generation according to claim 1 or (2), wherein the magnet rotor is characterized in that the rotating shaft is also integrated when forming the magnetic rotor. Disc type brushless [-ta] with built-in machine. (4) Claims m (1) to (3) characterized in that the stator armature is a coreless armature.
A disc-type brushless motor incorporating a frequency generator according to any one of paragraphs. (5) In the coreless armature, the opening angle of the conductor portion that contributes to the generated torque in the radial direction is the g1
A disk-type brushless 6-6 incorporating a frequency generator according to claim (4), characterized in that it is composed of a group of armature coils formed with a convergence f substantially equal to the magnetic pole width of a single-acting magnetic field. Ta. (6) A disc-type brushless E incorporating a frequency generator according to claim (5), characterized in that the first conductive armature coil group is arranged at equal intervals so as not to overlap each other. -ta.