JP2002262529A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor which can improve the application coefficient of magnetic poles of increasing an overlapping angle between projected poles to generate torque, and can essentially solve the problem of an existing SR motor by reducing leakage of a magnetic flux among magnetic bodies. SOLUTION: This motor comprises a stator 10 including: a plurality of slots SR1 to SR24 wound around a coil 12; a stator 10 including magnetic poles S1 to S24 formed between the adjoining slots SR1 to SR24; and magnetic pieces J1 to J16 including laminated plates 202a, 202b and 202c made of nonmagnetic materials laminated in the axial direction, each of which is arranged along the peripheral face opposing the stator 10 so as to be magnetically independent from each other. The magnetic pieces J1 to J16 magnetically couple two magnetic poles among S1 to S24 when opposed to the adjacent two magnetic poles among S1 to S24 and generate torque, when electrical power is fed to the coil 12, by the magnetic flux of a magnetic closed route generated between two magnetic poles among S1 to S24 and magnetic pieces J1 to J16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly, to a switched reluctance motor (hereinafter referred to as an SR motor).

[0002]

2. Description of the Related Art FIG. 15 shows a stator and a rotor of a conventional SR motor. The SR motor includes a cylindrical stator 1 and a columnar rotor 2 that rotates coaxially in the space inside the stator 1, and the rotor 2 is attached to a shaft 3. This SR motor has three phases, a six-pole stator,
The rotor 1 has four poles, and both the stator 1 and the rotor 2 are made of a magnetic material and are made of silicon steel sheets stacked in the axial direction.

[0003] The stator 1 has an inner circumference of 60 °.
Six salient poles (polar portions) Sa, Sb, Sc, Sd, Se, and Sf projecting inward are formed at positions shifted from each other, and each of the salient poles Sa to Sf has an exciting coil La to Sf.
Lf is wound, and the connection of the coils La to Lf and the direction of current flow are as shown in FIG.

On the other hand, the rotor 2 is provided with
Four salient poles Ra, Rb, Rc, Rd projecting outward are formed at positions shifted by 0 °.

FIG. 16 is a diagram showing the basic structure and operation principle of the SR motor shown in FIG. 15 including windings. Figure 1
6, a coil corresponding to the position of the rotor 2,
, A magnetic flux is transferred between the salient poles of the stator 1 and the salient poles of the rotor 2 facing each other. The salient poles of the rotor 2 are attracted to the salient poles of the stator 1 and Rotates and generates torque. Note that FIG.
, Coils wound around opposed salient poles of the stator 1 (La and Ld in FIG.
Lb and Le, Lc and Lf).

The position of the rotor 2 is detected by a position sensor (not shown) attached to the rotor 2, and a state 1 in which a current flows through the coil 2 → a state 2 in which a current flows through the coil 3 → a state 3 in which a current flows through the coil 3 → State 1 in which current flows through the coil
.. Is referred to as one step. This operation principle is also applied to the present invention.

FIG. 17 is a circuit diagram showing a drive circuit for driving the SR motor shown in FIG. In FIG. 17, a drive circuit is connected to each of the coils. That is, a diode D is connected to one end of each coil.
The anode of the switching element S1 is connected to the collector of the switching element S1, and the other end is connected to the emitter of the switching element S2 and the cathode of the diode D2. The collector of the switching element S2 and the cathode of the diode D1 are connected to the positive side of the power supply P, and the emitter of the switching element S1 and the anode of the diode D2 are connected to the negative side of the power supply P.

When the switching element S1 and the switching element S2 conduct, a current flows from the plus side of the power supply P to the switching element S2, the coil, and the minus side of the switching element S1 and the power supply P.

FIG. 18 is a diagram showing the inductance of the coil, the current supplied to the coil, and the torque generated in the motor for one phase. As is clear from FIG.
As the salient pole of the stator 1 and the salient pole of the rotor 2 at the unaligned position indicated by u approach each other as the rotor 2 rotates, the inductance of the coil gradually increases from the minimum value. When a current that changes a, b, c, and d flows through the coil in parallel with the rotation of the rotor 2, torque as a motor is generated. The inductance becomes maximum at a position where the salient poles of the stator 1 and the salient poles of the rotor 2 face each other, that is, at the aligned position. The inductance value of the coil becomes substantially flat around the alignment position. After the inductance becomes maximum, the inductance decreases as the salient poles of the rotor 2 move away from the salient poles of the stator 1 as the rotor 2 rotates, and the salient poles of the stator 1 move farthest from the salient poles of the rotor 2. The inductance shows the minimum value at the position. This is also the unaligned position.

FIG. 19 shows the magnetization curve of the SR motor, the horizontal axis shows the current flowing through the coil, and the vertical axis shows the flux linkage interlinking the coil. In FIG. 19, when the salient poles of the rotor 2 are farthest from the salient poles of the stator 1, the inductance value decreases, and as the salient poles of the rotor 2 approach the salient poles of the stator 1, the inductance increases, and the inductance becomes maximum. After that, the inductance reaches a plateau due to the magnetic saturation of the iron material, and the characteristics become almost flat.

The area surrounded by the flux linkage of the coil at the align position θA, the flux linkage at the unaligned angle θu, and the current line Im is magnetic energy. The magnetic energy is W, and the rotor 2 makes one rotation. In the meantime, assuming that the energization is switched Nst times, the average torque TA of the SR motor becomes W ×
It is represented by Nst / 2π. In order to increase the average torque TA, the magnetic energy W may be increased or the number of times Nst of energization switching per rotation may be increased. In the latter case, the number of switching times Nst can be increased by increasing the number of salient poles of the stator 1 and the rotor 2 or by increasing the number of phases of the coil. To increase the number of salient poles, for example, the salient poles of the stator 1 may be combined with 12, the salient poles of the rotor 2 may be combined with 8, or the salient poles of the stator 1 may be combined with 18, and the salient poles of the rotor 2 may be combined. However, when the number of salient poles is increased, the magnetic energy W is also reduced in proportion to the increase, so that the average torque TA is not increased. Further, the increase in the number of phases causes an increase in the size of the drive circuit and an increase in the size of the motor due to an increase in the number of wires from the motor. Therefore, it is essentially necessary to increase the magnetic energy W per step.

As specific means for increasing the magnetic energy W, (1) increase in unsaturated alignment inductance on the magnetization curve (2) increase in maximum interlinkage magnetic flux (3) decrease in unaligned inductance (4) inflection point It is necessary to increase the linkage flux. These characteristics are calculated using the following basic equations.

(1) Unsaturated aligned inductance La La = μo × S1 × N ² × A / LG where μo is the magnetic permeability of vacuum, S1 is the overlap area between stator 1 and rotor 2, and N is the number of turns of the coil. , A is the number of magnetic poles around which the coil is wound, and LG is the air gap length between the rotor 2 and the stator 1. (2) Maximum interlinkage magnetic flux Pm Pm = S2 × Bm × N × A where S2 is the magnetic flux Minimum magnetic path cross section in the road, Bm
Is the maximum magnetic flux density. (3) Unaligned inductance Lu Lu = k × N ² × C where k is the leakage inductance constant between the salient poles (slots) of adjacent rotors 2, and C is the number of slots. Bs is a saturation magnetic flux density. Optimizing the above parameters is an essential requirement at the time of design. For example, Bs is the number of turns N of the coil. It is thought that it will increase. When the number of turns N is increased, the non-saturated align inductance La and the maximum interlinkage magnetic flux Pm are increased, which contributes to an increase in the magnetic energy W, as is apparent from the above calculation formula. However, as is clear from the calculation formula, the unaligned inductance Lu to be reduced also increases, so that the inflection point interlinkage magnetic flux Ps to be increased decreases. Unaligned inductance L
The increase in u hinders the rise of the current at the time of high-speed rotation of the motor (at the highest driving frequency), and causes a problem that the generated torque of the motor at high-speed rotation is reduced.

Further, as long as the arrangement space of the coil is the same, the resistance value of the coil increases in proportion to the square of the number of turns, so that the motor has a large power loss (copper loss) of the coil. Increasing the number of turns of the coil in this way can contribute to an increase in the generated torque at the time of low-speed rotation of the motor, but deteriorates the performance and efficiency at high-speed rotation.

On the other hand, as means for increasing the non-saturated unaligned inductance La and the maximum linkage flux Pm, a method of increasing the overlap area S1 of the stator 1 and the rotor 2 and the minimum magnetic path cross-sectional area S2 in the magnetic path is used. There is. Further, as a means for reducing the inductance Lu at the time of unalignment, the distance between the salient poles (between the salient poles of the stator 1,
There is a method of lengthening the salient poles of the rotor 2 and the salient poles of the stator 1 and the rotor 2). However, the conventional motor has significant structural limitations as described below, and the motor must be increased in size to form a motor with a large generated torque and a small copper loss.

[0016]

FIG. 20 shows the stator salient pole angle and the rotor salient pole angle from the center of the motor, and FIG. 21 shows the relationship between the stator salient pole angle and the rotor salient pole angle. is there. 20 and 21 show Switched Reluctance Motors and their Control as a reference.
(TJEMiller. MAGNA PHYSICS PUBLISHING). This document includes the triangle A in FIG.
It is said that it is better to set the rotor salient pole angle and the stator salient pole angle respectively within the angle of the area represented by BC, but considering the generated torque, output, efficiency, and torque ripple of the motor comprehensively, Generally, the practical range is such that the rotor salient pole angle and the stator salient pole angle are in the range of 30 ° to 36 °. That is, in the conventional SR motor, the rotor 1
The ratio of the overlapping angle of the stator and the rotor per rotation (360 °) is 8.33 to 10%.

It can be said that this ratio is a factor limiting the performance of the conventional SR motor. This is stator 1
However, even if the number of salient poles of the rotor 2 is increased, the ratio of the overlap angle does not change, so that it is not a solution.
Conversely, if the number of salient poles of the stator 1 and the rotor 2 is carelessly increased, the length of the salient poles at the time of unalignment becomes shorter, the leakage magnetic flux increases, and the number of slots in which windings are formed increases. This causes an increase in unaligned inductance, and as a result, there is a limit in increasing the torque.

Further, the salient poles of each phase contribute to the generation of inductance when the phase is energized.
When the other phases are energized, they do nothing and are not being used effectively.

A main object of the present invention is to improve the utilization rate of magnetic poles by increasing the overlapping angle between salient poles for generating torque and the salient poles, and to reduce the leakage magnetic flux between the magnetic bodies. Is to provide a motor that can fundamentally solve the problem of the SR motor.

[0020]

According to a first aspect of the present invention, there is provided a multi-phase coil including first and second member structures, one of which is a stator and the other is a rotor. One of the first and second member structures extends in an axial direction along a peripheral surface facing the other member structure, and the coil is driven by rotating the rotor by sequentially switching and driving the rotor. Including a plurality of slots to be wound and a plurality of magnetic poles formed between adjacent slots, the other of the first and second member structures is formed of a non-magnetic material and is stacked in the axial direction. And a magnetic piece that is magnetically independently arranged in a circumferential direction along a peripheral surface facing one of the member structures, wherein the magnetic material piece has two adjacent magnetic poles. Opposite A motor that magnetically couples the two magnetic poles to generate torque by a magnetic flux of a magnetic closed circuit generated between the two magnetic poles and the magnetic piece when the coil is energized. did.

According to the first aspect of the present invention, when the magnetic material piece faces two adjacent magnetic poles, the two magnetic poles are magnetically coupled, and the torque is generated by the magnetic flux of the magnetic closed circuit generated between the two magnetic poles. Therefore, a large torque can be generated without increasing the number of turns of the coil.

Further, since the magnetic piece is held by the laminated plate formed of a non-magnetic material, the mechanical strength of the holding member is enhanced, the holding force for the magnetic piece is enhanced, and the leakage flux between the magnetic pieces is increased. And the generation of a larger torque can be compatible.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the SR according to the present embodiment.
FIG. 2 is a radial cross-sectional view showing a rotor, a stator, and a coil, which are basic components of a (Switched Reluctance) motor.

In the embodiment shown in FIG. 1, the rotor 20 is of an outer rotor type in which the outer periphery of the stator 10 is rotated. However, an inner rotor type motor in which the rotor rotates inside the stator may be used. The present invention can be applied.
Such an example will be described with reference to FIGS. One of the stator 10 and the rotor 20 constitutes a first member structure, and the other constitutes a second member structure.

The stator 10 is formed of a columnar magnetic body having a predetermined outer diameter, and has twelve salient poles S1 to S12 protruding radially outward along the outer periphery thereof.
12 slots SR1 formed between adjacent salient poles
To SR12 are alternately formed at equal intervals in the circumferential direction. Each of the salient poles S1 to S12 extends in the axial direction of the stator 10, gradually narrows from the center of the stator 10 toward the outside in the radial direction, and has a widened shape at the front end. Note that the slots SR1 to SR12 are
May be axially twisted within.

Coil Aa, Ab, Ba, Bb, Ca, C
b is wound around salient poles in the slots SR1 to SR12 with two salient poles and two slots skipped as shown in FIG. The SR motor according to the present embodiment is controlled by three phases, and is constituted by coils Aa and Ab, coils Ba and Bb, and coils Ca and Cb for each phase, and the coils are connected in series or in parallel in each phase. Is done. In FIG. 1, x,... Written on each coil represent coils Aa to
It shows the polarity of the winding of Cb, that is, the polarity when a current flows. × indicates a current flowing from the near side toward the paper surface, and · indicates a current flowing from the near side to the paper surface. FIG.
Does not indicate that current is flowing through all coils.

The rotor 20 is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the stator 10 by a predetermined gap, and rotates coaxially along the outer circumference of the stator 10. The rotor 20 is shown as a rotating body 21 having a ring-shaped cross section. Eight pieces J1 to J8 are fixed to the inner peripheral surface of the rotating body 21 at equal intervals. The rotator 21 is formed of a non-magnetic material or a magnetic material much weaker than the stator 10, and performs magnetic interruption in the circumferential direction between the magnetic material pieces J1 to J8. Therefore, the magnetic material pieces J1 to J8 are magnetically independent in the circumferential direction, and substantially no magnetic path is formed between the magnetic material pieces adjacent in the circumferential direction, or the magnetic path is formed. It has become difficult.

Each of the magnetic pieces J1 to J8 has its inner peripheral surface slightly projecting radially inward from the inner peripheral surface of the rotating body 21, and is connected to the salient poles S1 to S12 of the stator 10 through an appropriate gap. The stator 10 and the rotor 20 are configured to be magnetically coupled to each other with a magnetic resistance that is opposed, mechanically stable, and low in a magnetic circuit. In the present embodiment, the width on the inner peripheral surface side of each magnetic piece J1 to J8 is formed to be larger than the width of each of the salient poles S1 to S12.

FIGS. 2 to 4 are diagrams for explaining the operation of the SR motor shown in FIG. 1 for each step. First, when a current flows through the first-phase coils Aa and Ab as shown in FIG. 2 due to the positional relationship between the stator 10 and the rotor 20, the coils Aa and Ab are wound in two-slot intervals. Slots SR1 and SR4 in which the coils Aa are housed at every 90 ° angle as viewed from the center of
Magnetic flux is generated around the slots SR7 and SR10 in which the coil Ab is housed. This magnetic flux is generated between adjacent salient poles S1 and S1.
2 (S4 and S5, S7 and S8, S10 and S11) and the magnetic piece J2 (J4, J6, J8)
It flows through a closed loop magnetic path surrounding R1 (SR4, SR7, SR10). Then, salient pole combinations S1 and S2,
The direction in which the magnetic flux flowing between S4 and S5, S7 and S8, S10 and S11 and the magnetic pieces J2, J4, J6 and J8 increases, that is, the magnetic flux coupled to the coil has a maximum value (the coil inductance has a maximum value). A rotational torque is generated in the following direction. 2 to 4, the direction of the torque is indicated by an arrow.
If this is shown in FIG. 19 described above, the inductance of the coil indicates a direction that changes from Lu to LA.

FIG. 3 shows a state proceeding from FIG. 2, in a state in which the energization to the first phase composed of the coils Aa and Ab is switched to the energization to the second phase composed of the coils Ba and Bb. . In FIG. 3, the current starts flowing through the coils Ba and Bb. At this time, the inductance of the coils Ba and Bb is such that the magnetic resistance of the magnetic material piece of the rotor 20 has a minimum value with respect to the coils Ba and Bb. That is, the second phase is located at the position of the unalignment θu in FIG. 19, and takes the inductance Lu.

FIG. 4 proceeds further to show the combination of salient poles S1 and S2 of the stator 10, S4 and S5, S7 and S8, S10.
And the magnetic flux in S11 and the magnetic pieces J2, J4, J6, J8 take the maximum value, and the first phase coils Aa, Ab
Is at the align position θA in FIG. 18, and the inductance takes the maximum value LA. In this state, the inductance of the coils Ba and Bb of the second phase is in the process of increasing, and the torque shown in the arrow direction of FIG. 4 is generated following the first phase. At this time, the torque generated by the first phase is zero. After the first-phase coils Aa and Ab have passed the alignment position θA, the current supplied to the first-phase coils Aa and Ab is cut off to prevent the generation of torque in the direction opposite to the rotation direction of the rotor 20. . Similarly, as the steps progress from the second phase to the third phase (the coils Ca and Cb) and the first phase, the rotation torque is continuously generated.

As is clear from the above description of operation, the magnetic flux generated around the coil wound around each throttle is:
Flows so as to form a closed circuit between the magnetic piece that is magnetically insulated from the other in the circumferential direction and the facing magnetic pole, and energizes the coil wound on the next throttle corresponding to the next phase The generated magnetic flux is magnetically insulated from the previous phase, so that torque can be continuously and efficiently generated without receiving interference between phases.

That is, in one embodiment of the present invention, the magnetic flux can flow between one magnetic piece of the rotor 20 and the magnetic poles on both sides of one slot of the stator 10 facing the magnetic piece. Since the magnetic poles and the magnetic pieces can be used at more locations on the circumference of the rotor 20 than before, the magnetic poles S1 to S1 of the stator 10 can be used.
2 is shared with the other phases, so that the overlapping area of the stator 10 and the rotor 20 at the time of alignment and the cross-sectional area for determining the maximum interlinkage magnetic flux are different from those of the conventional SR motor as can be understood from FIGS. Therefore, it is understood that it can be approximately doubled. Furthermore, since the magnetic pieces J1 to J8 of the rotor 20 are magnetically insulated in the circumferential direction,
It also has the advantage that magnetic leakage during unalignment is suppressed and inductance during unalignment is reduced.

This makes it possible to increase the magnetization energy W shown in FIG. That is, a large torque can be ensured without increasing the number of turns of the coil, and at the same time, the inductance at the time of unalignment can be suppressed low, so that a high torque can be ensured not only at a low speed but also at a high speed and high efficiency can be secured.

FIG. 5 shows details of the embodiment of the present invention shown in FIG. 1, and FIG. 6 is a sectional view taken along the line AA of FIG. 5 and 6, the stator 10 made of a magnetic material is provided with 24 magnetic poles S1 to S24, and slots SR1 to SR24 around which coils are wound are provided between the magnetic poles S1 to S24. is set up. Each coil has slots SR1 to S
It is wound to skip two R24s.

On the other hand, the rotor 20 includes a plurality of non-magnetic metal laminated plates 202 stacked on each other in the direction of the rotation axis.
a, 202b, 202c,... (FIG. 6).
Has magnetic pieces J1 to J16 (collectively 201).
Are engaged. The magnetic piece 201 is not limited to this, but is formed of, for example, a silicon steel sheet formed by press working. Each magnetic material piece 201 may be a solid magnetic material or a so-called powder metal obtained by solidifying a powder-like magnetic material. FIG.
As shown in (1), the magnetic piece 201 is symmetrical with a large-diameter inner peripheral surface 201a and a small-diameter outer peripheral surface 201b, and further includes two claw portions 201c. Holding member 2
Numeral 02 has a notch 202p (FIG. 5) and is formed in a shape into which the magnetic piece 201 is fitted. When the claw 201c is engaged with the notch 202p of the holding member 202, the magnetic material piece 201
2 is firmly installed.

The engagement between the holding member 202 and the magnetic piece 201 can be any of a tight fit with a predetermined interference, a gap fit with a gap between them, and an intermediate fit between them. . In the case of adopting the gap fitting, it is preferable that a resin material or the like is interposed between the two to eliminate play.
The plurality of holding members 202 coupled to the magnetic body 201
As shown in (1), the rotor 20 is sandwiched between the rotor 20 by a cover 30 fixed by caulking or bolting.

In FIG. 6, the rotor 20 has a shaft 4
0 is connected. A coil 12 is wound around a stator 10 (in the present embodiment, a laminated plate of a plurality of magnetic metal members, but is not necessarily a laminated plate). Reference numeral 13 is connected to a drive circuit (not shown) via a terminal (not shown). The housing 50 includes the stator 10 and the bearing 3
1, 32 are held. The rotor angle sensor 33 has its rotor 34 coupled to the shaft 40 and its stator 35 coupled to the housing 50 to detect the angular position of the rotor 20. This detection output is given to a controller (not shown). The controller drives each coil in the order of each phase based on the detected angle.

According to the above-described embodiment, the magnetic piece 201 is formed of the holding member 20 made of a non-magnetic material.
2 is engaged with the holding member 202 through the claw portion 201c, so that the rotor 20 does not fall off the holding member due to centrifugal force or vibration of the rotor 20. Further, the working process is simplified as compared with the case where the magnetic material piece 201 and the holding member 202 are joined using an epoxy-based adhesive or the like. Furthermore, unlike the case where the members are joined by welding, a circulating current does not flow through the welded portion, and eddy current does not occur.

Further, since the holding member 202 is formed of a nonmagnetic metal, there is an advantage that mechanical strength can be obtained as compared with a case where the holding member 202 is formed of a resin material or a ceramic material.

The connection between the magnetic piece 201 and the holding member 202 according to the present invention does not necessarily need to be a fitting connection as described above, and the magnetic piece 201 is made of a non-magnetic material such as aluminum or magnesium. It may be cast in a laminate made of metal.

As shown in FIG. 12, generally, when a magnetic path MP is formed between the stator 10 and the magnetic piece 201, an eddy current WI is generated in the holding member 202. Because of this, the leakage magnetic flux LM between the adjacent magnetic pieces 201
And adversely affect the motor torque.

However, according to the present embodiment, the holding member 202 is composed of a plurality of non-magnetic metal laminated plates 202a and 202a.
, eddy currents WI generated in the respective laminated plates 202a, 202b, 202c... as shown in FIG. 13 and FIG. Is relatively small (generally, the eddy current loss is inversely proportional to the square of the number of laminated plates), so that the leakage magnetic flux LM generated between the adjacent magnetic material pieces 201 is also small. Therefore, according to the present embodiment,
The holding member 202 is made of a plurality of nonmagnetic metal laminated plates 202.
a, 202b, 202c,..., to improve the mechanical strength of the holding member 202, to increase the holding force of the magnetic piece to the 201, and to make the leakage magnetic flux LM generated between the adjacent magnetic pieces 201. And the improvement of the motor torque can be achieved.

FIG. 8 shows an embodiment according to a modification of the present invention, in which the embodiment shown in FIG. 5 is applied to an inner rotor type. In the present embodiment, the stator 10 made of a magnetic material is provided with 24 magnetic poles S1 to S24, and each of the magnetic poles S1 to S2.
Four slots SR1 to SR24 around which the coil is wound
Are installed respectively. Each coil is wound so as to skip two slots as shown in FIG. 5 (not shown). Magnetic pieces J1 to J16 are engaged with a holding member 202 formed of a plurality of nonmagnetic metal laminated plates. The method of connecting the holding member 202 and the magnetic pieces J1 to J16 is the same as that in FIG.

FIG. 9 shows an embodiment according to a further modified example of the present invention, which is different from the one shown in FIG.
1 to J16 are modified. In the present embodiment, a slight recess 201d is provided on the inner peripheral side of the rotor 20 of the magnetic pieces J1 to J16 (collectively denoted by 201), and the outer peripheral surface 201b of the magnetic piece 201 and the shaft 4 are formed.
The distance in the radial direction between 0 and 0 is increased. As a result, the occurrence of leakage magnetic flux from the magnetic piece 201 toward the shaft 40 is reduced. The method of coupling the holding member 202 and the magnetic material piece 201 is the same as that in FIG. Each coil is wound so as to skip two slots as shown in FIG. 8 (not shown).

FIG. 10 shows an embodiment according to a further modification of the present invention. In contrast to the embodiment shown in FIG. 8, pins P1 to P16 ( 60 (collectively referred to as 60).
Also in the present embodiment, each coil is wound so as to skip two slots as in FIG. 8 (not shown).

FIG. 11 shows a BB section of FIG. In the present embodiment, the magnetic pieces J1 to J16 (20
1), which is sandwiched between both sides
a and 70b, the pin 60 is passed through the magnetic piece 201, and the end plate 70 is provided at both ends of the pin 60.
a, 70b. The end plate 70
a and 70b are caulked to the holding portion 40a of the shaft 40 on the inner peripheral surface thereof. According to the present embodiment, the work of connecting magnetic piece 201 to holding member 202 is easy, and the positional accuracy of magnetic piece 201 with respect to holding member 202 can be improved.

FIGS. 22 to 30 show a further modified embodiment of the method for connecting the magnetic piece of the present invention to the holding body which is a laminated plate. FIG. 22 shows the connection between the magnetic piece and the holding body. FIG. 23 is a sectional view taken along the line DD of FIG. FIG. 24 shows the first magnetic piece 81. As shown in the figure, the first magnetic piece 81 includes an arc 81b and three protrusions 81a. In FIGS. 22 and 24 to 27, white dots indicate protrusions used for coupling the first magnetic piece 81 and the second magnetic piece 82, and black dots indicate the first laminated plate 83. A projection used when connecting the second magnetic piece 82 and a double circle represent a projection used when connecting the first laminated plate 83 and the second laminated plate 84.

FIG. 25 shows a second magnetic piece 82 which has an arc 82c and which is engaged with the three projections 82a of the first magnetic piece 81 and the first laminate 83. It has three projections 82b to be used.

FIG. 26 shows the first laminated plate 83, which is provided with a punched arc 83c having a larger curvature than the arc 81b of the first magnetic piece 81. Further, three projections 83a that engage with the projections 82b of the second magnetic piece 82, and projections 83b that are used when coupling with the second laminated plate 84 are provided.

FIG. 27 shows a second laminated plate 84 having a punched arc 84b having a larger curvature than the arc 82c of the second magnetic piece 82. Also, the projections 83 of the first laminated plate 83
The projection 84a is provided for engaging with the projection 84b.

The first magnetic piece 81, the second magnetic piece 82, the first laminated plate 83 and the second laminated plate 84 are connected as follows. As shown in FIGS. 22 and 23,
The projection 82b of the second magnetic piece 82 and the projection 83a of the first laminated plate 83 are engaged with each other to couple the second magnetic piece 82 to the first laminated plate 83. Also, the first magnetic piece 8
The first projection 81a and the projection 82a of the second magnetic piece 82 are engaged with each other to couple the first magnetic piece 81 and the second magnetic piece 82 together. Further, the protrusions 8 of the first laminated plate 83
The first laminated plate 83 and the second laminated plate 84 are coupled by engaging the projection 3a with the projection 84a of the second laminated plate 84.

According to the present embodiment, the magnetic piece and the laminate can be easily connected only by engaging the magnetic piece and the projection provided on the laminate. Further, the protrusions provided on the magnetic material piece and the laminate can be easily manufactured by a process such as pressing.

The projection used in the present embodiment may have a basic shape of a cylinder 84 as shown in FIGS. 28 and 29, or a triangular shape 85 as shown in FIG.
It may be.

FIGS. 31 and 32 show an embodiment according to a further modification of the present invention. In contrast to those shown in FIGS. 10 and 11, magnetic pieces J1 to J16 (collectively denoted by 201) are provided on shafts. Pipes P1 to P16 (pin members, collectively referred to as 60) made of non-magnetic material are used for fixing to the 40 side. In the present embodiment, the configuration on the side of the stator 10 is the same as that shown in FIGS. 10 and 11, so the configuration on the side of the stator 10 in FIGS. 10 and 11 is shown in FIGS. Absent. FIG. 32 is a sectional view taken along the line EE in FIG.

As shown in FIGS. 31 and 32, this embodiment is largely different from the one shown in FIGS. 10 and 11 in that the magnetic piece 201 is made of two adjacent non-magnetic pipes. 10 and 11 in that no member corresponding to the holding member 202 in FIGS. 10 and 11 exists.

That is, in the present embodiment, the magnetic material piece 201 is sandwiched between both ends in the axial direction.
A plurality of substantially annular end plates 70a and 70b are fixed to the holding portion 40a of the shaft 40. These end plates 70a and 70b are made of a non-magnetic material that is erected in the axial direction along the circumferential direction. Both ends of the plurality of pipes 60 are fixed. Each of the magnetic pieces 201 is connected to two adjacent ones of the fixed pipe 60.
It is held by sandwiching both end faces in the circumferential direction between the book pipes 60. For example, the magnetic piece J1 is sandwiched between two adjacent pipes P1 and P16. Therefore, it is desirable that arcuate concave portions having a radius of curvature substantially equal to the radius of curvature of the outer peripheral surface of the pipe 60 abutting are formed on both end surfaces in the circumferential direction of the magnetic piece 201. Thus, each magnetic piece 201
Is sandwiched between two pipes 60 adjacent to each other, so that it can be securely fixed to the shaft 40 side without a member corresponding to the holding member 202 in FIGS. 10 and 11. Further, since the pipe 60 sandwiching the magnetic material piece 201 is formed of a non-magnetic material, the magnetic material pieces 201 are magnetically insulated in the circumferential direction, so that magnetic leakage during unalignment is suppressed.

Next, a procedure for assembling the rotor according to the present embodiment will be briefly described with reference to FIGS. 31 and 32.
First, the inner peripheral surface of the substantially annular end plate 70a is inserted into the holding portion 40a of the shaft 40 from the left in FIG. 32 and press-fitted, and the end plate 70a is inserted into the flange portion 40b provided on the holding portion 40a of the shaft 40. Abut. Next, by caulking the caulking portion 40d provided on the holding portion 40a of the shaft 40, the end plate 70
a is securely fixed to the shaft 40. Next, in a state where the left end of the pipe 60 is inserted into the pipe insertion hole (not shown) provided in the end plate 70a from the right direction in FIG.
And inserted from the right side so as to be sandwiched between the pipes 60. Next, the inner peripheral surface of the substantially annular end plate 70b is inserted into the holding portion 40a of the shaft 40 from the right side in FIG. 32 and press-fitted, and the end plate 70b is inserted into the flange portion 40c provided on the holding portion 40a of the shaft 40. Abut. At this time, the right end of the pipe 60 is inserted and temporarily fixed in a pipe insertion hole (not shown) provided in the end plate 70b. Next, in this state, the shaft 4
The end plate 70b is securely fixed to the shaft 40 by caulking the caulking portion 40e provided on the zero holding portion 40a.

When the above assembling process is completed, the fixing of the end plates 70a and 70b to the shaft 40 is completed, but the fixing of the end plates 70a and 70b to the pipe 60, and the pipe 60 and the magnetic material piece 201 are completed. Are not completed (they are in a state of being fitted with each other). Therefore, they are in a state where they can slightly move relative to each other. Next, in order to fix these, first, each magnetic material piece 2
01 from the radial outer side to the radial inner side,
Press with a suitable jig (not shown). This allows
Each magnetic piece 201 moves in the radial direction, and the pipe 60 is also pushed by the magnetic piece 201 and moves in the radial direction. When the pipe 60 moves in the radial direction, the distance between the pipes 60 decreases, and eventually the pipe 60 moves.
The movement of the magnetic piece 201 and the pipe 60 in the radial direction is completed at a position where the magnetic material piece 201 and the circumferential end surfaces of the magnetic piece 201 abut securely. In this state, pipe 6
0 and the magnetic piece 201 are fixed to each other. Finally, while maintaining this state, the pipe 6
The both ends of 0 are caulked and fixed to end plates 70a and 70b. As described above, the end plates 70a and 70b are fixed to the pipe 60, and the pipe 60 and the magnetic piece 20 are fixed.
1 and the assembly on the rotor side is completed.

The procedure for assembling the rotor according to the present embodiment has been described above. According to the present embodiment, the following effects can be obtained.

First, since the magnetic material piece 201 is sandwiched and fixed between two adjacent non-magnetic pipes 60, it is necessary to design the pipes 60 thick to increase rigidity. At this time, it becomes easier to design the pipe 60 thicker than the pins 60 in the forms shown in FIGS. 10 and 11. That is, since the pin 60 in the form shown in FIGS. 10 and 11 penetrates through the magnetic piece 201, if the pin 60 is to be made thicker, the magnetic piece 20
From the viewpoint of securing the thickness of 1, the magnetic material piece 201 itself needs to be designed large. Then, the distance between the adjacent magnetic material pieces 201 is inevitably shortened, magnetic leakage occurs, and the motor efficiency tends to be reduced. However, according to the present embodiment, even if the pipe 60 is made thicker for higher rigidity,
It is not necessary to increase the size of the magnetic piece 201 itself, and the shape of both circumferential end faces of the magnetic piece 201 can be changed according to the shape of the pipe 60 without shortening the distance between adjacent magnetic pieces 201. Is easy.
Therefore, the pipe 60 is connected to the pin 6 shown in FIGS.
It is possible to provide a motor that is less likely to cause the above-described problem of magnetic leakage even if the thickness is made larger than 0 and the rigidity of the rotor side is increased.

Further, according to the present embodiment, since the magnetic material piece 201 is securely held between the two pipes 60 adjacent to each other, a member corresponding to the holding member 202 in FIGS. It is unnecessary. Therefore, the weight and cost of the rotor itself can be reduced, and high response, high efficiency, and low cost of the motor can be achieved.

Further, according to the present embodiment, when the magnetic piece 201 is securely fixed to the rotor, the outer peripheral surface of the magnetic piece 201 is moved from the radially outer side to the radially inner side as described above. To the pipe 60 in this state.
Only need to be caulked and fixed to the end plates 70a and 70b. Accordingly, the magnetic piece 201 can be easily and reliably fixed to the rotor side by adding a simple assembly process. On the other hand, according to the embodiment shown in FIGS. 8 and 10 described above, the fixing target member (the holding member 202 in FIG. 8, the pin 60 in FIG. 10) for fixing the magnetic piece 201 and the magnetic piece 201 It is necessary to manage the fitting allowance with high precision. That is, the magnetic material piece 2
01 and the fixing target member are gap-fitted, the gap is filled with a resin material or the like and the magnetic material piece 20 is filled.
1 is fixed, but if the gap is too small, it becomes difficult to fill the resin material, and if the gap is too large, there is a problem that the filling area of the resin material is widened and the strength is reduced. On the other hand, when the fitting between the magnetic material piece 201 and the fixing target member is a tight fit, if the interference is too large, the magnetic material piece 201 may be stressed by the fitting.
However, there is a problem that the semiconductor device is easily damaged. Therefore, it is necessary to manage the fitting allowance with high accuracy, and therefore, the fitting surface of the magnetic material piece and the fixing target member includes:
It is necessary to perform more expensive machining on the surface formed by inexpensive pressing. Therefore, FIG. 8 and FIG.
In the embodiment shown in (1), extra mechanical processing is required to securely fix the magnetic material piece 201 to the fixing target member, and the production cost is relatively increased.
However, according to the present embodiment, there is no need to control the fitting margin (gap fitting) between the magnetic material piece 201 and the pipe 60 with high precision, and the magnetic material piece 201 is formed only by pressing.
And the pipe 60 can be manufactured. Therefore,
According to the present embodiment, it is possible to easily and reliably fix the magnetic piece 201 to the rotor side by adding a simple assembling process without increasing the processing cost of the component parts.

In this embodiment, in order to fix the magnetic piece 201 to the pipe 60, as shown in FIG. 33, a load is applied to the pipe 60 from the radial direction (the direction of the arrow) to plastically deform the pipe 60. This may be performed by filling the gap between the two. Also, pipe 6
In order to plastically deform 0, a method may be adopted in which a steel ball having an outer diameter slightly larger than the inner diameter of the pipe is passed through the inside of the pipe 60 so that the outer diameter of the pipe 60 is expanded by plastically deforming the pipe 60. Further, the magnetic piece 201 may be plastically deformed to reduce the gap between the two. In this case, it is preferable to plastically deform an appropriate position of both end surfaces in the circumferential direction of the magnetic material piece 201 (the surface in contact with the pipe 60) by caulking or the like. When the pipes 60 are plastically deformed, it is not necessary to plastically deform all the pipes 60. For example, every other pipe 60 may be plastically deformed.

In order to fix the magnetic material piece 201 to the pipe 60, as shown in FIG. 34, before inserting the magnetic material piece 201 between the pipes 60, the radial direction of the magnetic material piece 201 (each plate constituting the magnetic material piece 201) is required. A substantially central portion may be bent by a predetermined angle. Before the bending, the circumferential end faces of the magnetic material piece 201 are formed so as to be in a gap-fitted state with respect to the pipe 60. The pipe 60 is slightly tightly fitted to the pipe 60. By inserting the magnetic material piece 201 in this state into the pipe 60, the fitting surface of the magnetic material piece 201 abuts on the pipe 60, the bending angle is appropriately reduced by elastic deformation, and the interference is appropriately adjusted. Accordingly, the magnetic piece 201 can be securely fixed to the pipe 60 without any gap and without applying excessive stress.

In this embodiment, the pipe 6
Although 0 (pin member) is used, it goes without saying that a pin may be used. Further, in the present embodiment, the inner rotor type is adopted, but it goes without saying that the present structure can be adopted for the outer rotor type.

FIG. 36 and FIG. 37 show an embodiment according to a further modification of the present invention. In contrast to those shown in FIG. 8 to FIG. 11, magnetic pieces J1 to J16 (magnetic piece portion.
201 and a holding member 202 (base) are formed of a plate integrally formed of a magnetic material, and the rotor is constituted by a laminated plate in which the plates are stacked in the axial direction. In the present embodiment, the configuration on the stator 10 side is the same as that shown in FIGS.
36 and 37, the configuration on the stator 10 side in FIGS. 8 to 11 is not shown. In addition, FIG.
It is FF sectional drawing in FIG.

As shown in FIGS. 36 and 37, in the present embodiment, magnetic pieces J1 to J16 (magnetic piece portions) and a substantially annular base corresponding to the holding member 202 in FIGS. E1 is connected at a plurality of radially extending beam portions R1 to R16, and plates made of a magnetic material in which these are integrated are stacked in the axial direction to form a laminated plate. The laminated plate is inserted into the holding portion 40a of the shaft 40, and is fixed by sandwiching both ends between end plates 70a and 70b fixed to the holding portion 40a of the shaft 40. End plates 70a, 70b
Is fixed to the holding portion 40a of the shaft 40 by the shaft 4
Crimping portions 40d and 40e provided on the holding portion 40a
It is performed by caulking.

Further, as shown in FIG. 36, the above-mentioned plate is provided with magnetic members adjacent to each other in order to improve strength against external forces such as centrifugal force and suction force acting on the magnetic member piece 201 when the rotor rotates. A plurality of connecting portions H1 to H16 that connect the pieces 201 in the circumferential direction are provided integrally. FIG. 38 is a view showing a state in which H
It is the enlarged view which expanded the periphery of 1 and H16. As shown in FIG. 38, the connecting portions H1 to H16 are
1 is formed at the outermost peripheral position. The connecting portions H1 to H16 are connected to the magnetic piece 20 as shown in FIG.
1 may be formed slightly radially inward from the outermost position. In addition, as long as the strength can be ensured, there is no need to provide a connecting portion as shown in FIG.

When these connecting portions H1 to H16 are provided integrally, since these connecting portions are also made of a magnetic material, a problem of magnetic leakage at the time of unalignment between the magnetic material pieces 201 adjacent to each other occurs. Easier to do. In order to prevent this magnetic leakage, in the present embodiment,
The connection portions H1 to H16 are subjected to a demagnetization reforming process. The non-magnetization reforming treatment includes, for example, a process in which a high-power laser is used to drive nickel, chromium, and the like into a silicon steel plate (ferrite steel), which is a magnetic material, to modify the steel into an austenitic steel that is hard to pass magnetism. Can be By performing the demagnetization reforming process on the connecting portions H1 to H16, the magnetic pieces 201 are magnetically insulated from each other in the circumferential direction, so that magnetic leakage during unalignment is suppressed.

It is preferable that the above-described non-magnetization reforming process is also performed on the beam portions R1 to R16. Due to the configuration of the magnetic circuit (see FIGS. 2 to 4), although the degree of magnetic leakage due to the leakage of magnetism to the base E1 via the beams R1 to R16 is small, in order to reliably prevent magnetic leakage,
Needless to say, it is better to perform the above-described demagnetization reforming process not only on the connecting portions H1 to H16 but also on the beam portions R1 to R16. As shown in FIG. 36, between the magnetic pieces 201 of the above-mentioned plate, a plurality of blank spaces are provided by being surrounded by the adjacent magnetic pieces, beams, and base E1. However, it is desirable to form these punched spaces as large as possible in consideration of strength and performance. As a result, the distance between the adjacent magnetic material pieces is increased, and it is possible to further prevent magnetic leakage occurring between the adjacent magnetic material pieces.

According to the present embodiment, the following effects can be obtained.

First, the magnetic material piece 201 (magnetic material piece portion) and the substantially annular base E1 corresponding to the holding member 202 in FIGS. 8 to 11 are integrally formed. In order to fix the piece 201 to the rotor side,
A claw 201c may be provided on the magnetic piece (see FIGS. 8 and 9).
(See FIGS. 10 and 11).
There is no need to take structural measures such as Further, each plate forming the laminated plate can be manufactured by inexpensive press working or the like. Therefore, an inexpensive motor can be provided.

Further, according to the present embodiment, connecting portions H1 to H16 and beam portions R1 to R16 are provided for each of the plates constituting the laminated plate, and these are subjected to a demagnetization reforming process. In addition, it is possible to provide a high-strength and high-rigidity laminated board without causing performance degradation due to magnetic leakage.

Further, according to the present embodiment, it is possible to cope with various variations of motors having different lamination lengths while maintaining high strength and high rigidity by changing only the lamination length of the lamination plate. It becomes possible. That is, when the magnetic piece 201 is fixed by the pins 60 and the like supported at both ends (see FIGS. 10 and 11), the longer the lamination length of the laminate, the longer the pins 60 and the like, and the longer the pins 60 and the like. As the length becomes longer, the bending of the pin 60 and the like when an external force such as a centrifugal force is applied to the magnetic material piece 201 increases. Therefore, the magnetic piece 201 is connected to the pins 6 supported at both ends.
In the case where it is fixed at 0 or the like, the degree of freedom in design must be reduced in terms of strength and rigidity with respect to the lamination length of the laminate. However, according to the present embodiment, connecting portions H1 to H16 and beam portions R1 to R16
Is provided, so that the strength and rigidity of the laminated plate are hardly changed even when the laminated length changes, and it is possible to provide a stable high-strength and high-rigid laminated plate which is not affected by the laminated length. .

In the present embodiment, the inner rotor type is adopted, but it goes without saying that the present structure can be adopted for the outer rotor type.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. For example, when the holding member 202 and the magnetic material piece 201 are both a plurality of laminated plates, the thicknesses of both plates need not be the same, but may be different from each other.

The embodiments disclosed herein are all rotary motors. However, as is well known, the stator and the rotor may be cut open at a certain point in the circumferential direction and used as a linear motor.

[0079]

As described above, according to the present invention, the magnetic fluxes generated by the windings wound around the slots accommodating the coils of each phase are aligned in a magnetic state insulated from each other by the magnetic material. Are arranged so as to short-circuit with the two magnetic poles, and the magnetic flux from the adjacent slot corresponding to the next phase is magnetically insulated from the previous phase, so that torque can be continuously applied without interference between phases. Can occur.

Further, since the overlapping area between the salient poles and the cross-sectional area for determining the maximum interlinkage magnetic flux at the time of alignment are magnetically insulated, the magnetic leakage at the time of unalignment is suppressed, and the inductance at the time of unalignment is low. Therefore, it is possible to increase the magnetization energy.

That is, a large torque can be secured without increasing the number of turns of the coil, and at the same time, the inductance at the time of unalignment can be kept low. Can be secured.

Further, since the magnetic piece is held by the laminated plate formed of the non-magnetic material, the mechanical strength of the holding member is improved, the holding force for the magnetic piece is increased, and the leakage between the magnetic pieces is prevented. The generation of a larger torque can be compatible with the reduction of the magnetic flux.

[Brief description of the drawings]

FIG. 1 is a radial cross-sectional view showing a rotor, a stator, and a coil, which are basic components of an SR motor according to the present invention.

FIG. 2 is a view for explaining an operation of a first step of the SR motor shown in FIG. 1;

FIG. 3 is a diagram for explaining an operation of a second step of the SR motor shown in FIG. 1;

FIG. 4 is a view for explaining an operation of a third step of the SR motor shown in FIG. 1;

FIG. 5 is a radial cross-sectional view for describing the SR motor of the present invention in detail.

6 is a sectional view taken along line AA of FIG.

FIG. 7 is an enlarged view of a magnetic piece.

FIG. 8 is a radial sectional view showing a rotor, a stator, and a coil of an SR motor according to a second embodiment of the present invention.

FIG. 9 is a radial sectional view showing a rotor, a stator, and a coil of an SR motor according to a third embodiment of the present invention.

FIG. 10 is a radial sectional view showing a rotor, a stator, and a coil of an SR motor according to a fourth embodiment of the present invention.

FIG. 11 is a sectional view taken along line BB of FIG. 10;

FIG. 12 is a diagram for explaining a leakage magnetic flux generated between magnetic material pieces of a conventional SR motor.

FIG. 13 is a diagram for explaining leakage magnetic flux generated between magnetic material pieces of the SR motor according to the present invention.

FIG. 14 is a sectional view taken along line CC of FIG.

FIG. 15 is a diagram showing a stator and a rotor of a conventional SR motor.

16 is a diagram showing a basic structure and an operation principle including windings of the SR motor shown in FIG.

FIG. 17 is a diagram showing a drive circuit for driving the SR motor shown in FIG.

FIG. 18 is a diagram showing coil inductance, current, and generated torque for one phase.

FIG. 19 is a diagram showing a magnetization curve of the SR motor.

FIG. 20 is a diagram showing a stator pole angle and a rotor pole angle.

FIG. 21 is a diagram showing a relationship between a stator pole angle and a rotor pole angle.

FIG. 22 is a view showing a modification of the joint between the magnetic piece and the laminate according to the present invention.

FIG. 23 is a sectional view taken along the line DD in FIG. 22;

24 is a diagram illustrating a first magnetic body piece illustrated in FIG. 22.

FIG. 25 is a diagram illustrating a second magnetic piece.

FIG. 26 is a diagram illustrating the first laminate illustrated in FIG. 22.

FIG. 27 is a diagram illustrating a second laminated board.

FIG. 28 is a view showing a cylindrical projection provided on the magnetic material piece or the laminated plate shown in FIG. 22.

FIG. 29 is a side view of FIG. 28.

30 is a diagram illustrating triangular protrusions provided on the magnetic piece or the laminated plate illustrated in FIG. 22.

FIG. 31 is a radial sectional view showing a rotor of an SR motor according to a fifth embodiment of the present invention.

FIG. 32 is a sectional view taken along line BB of FIG. 31.

FIG. 33 is a view showing a state in which an external force is applied to the pipe 60 to cause plastic deformation.

FIG. 34 is a front view showing the magnetic piece 201 that has been bent in advance.

FIG. 35 is a right side view of FIG. 34.

FIG. 36 is a radial cross-sectional view illustrating a rotor of an SR motor according to a sixth embodiment of the present invention.

FIG. 37 is a sectional view taken along line BB of FIG. 36;

FIG. 38 is a partially enlarged view near a beam portion R1 in FIG. 36;

FIG. 39 is a view showing a state where the positions of connecting portions H1 to H16 are shifted in a radially inner direction in FIG. 38;

FIG. 40 is a view showing a state where connection portions H1 to H16 are eliminated in FIG. 38;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Stator 12 ... Coil 20 ... Rotor Aa, Ab, Ba, Bb, Ca, Cb ... Coil S1-S24 ... Magnetic pole SR1-SR24 ... Slot J1-J16 ... Magnetic piece E1 Base part H1 to H16 Connecting part R1 to R16 Beam part 201 Magnetic piece (magnetic piece part) 202 Holding member 201c Claw part 201d ... Recesses 202a, 202b, 202c ... Laminated plate 202P ... Notches P1 to P16 ... Pins 60 ... Pins and pipes 70a, 70b ... End plates 81 ... First magnetic body Piece 82: Second magnetic piece 83: First laminated plate 84: Second laminated plate 81a, 82a, 82b, 83a, 83b, 84a,.
・ Protrusion

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akinori Hoshino 2-1-1 Asahi-cho, Kariya-shi, Aichi Aisin Seiki Co., Ltd. (72) Inventor Satoshi 2-1-1, Asahi-cho, Kariya-shi, Aichi Aisin Within Seiki Co., Ltd. (72) Inventor Ichiro Arita 2-1-1 Asahi-cho, Kariya-shi, Aichi Aisin Seiki Co., Ltd. (72) Inventor Akemi Okawa 2-1-1 Asahi-cho, Kariya-shi, Aichi Aisin Seiki Co., Ltd. F term (reference) 5H002 AA01 AA08 AB04 AB06 AB07 AC01 AC07 AE07 AE08 5H603 BB01 BB09 BB10 BB12 CB02 CC03 5H619 AA03 AA05 BB01 BB06 BB13 BB15 BB24 PP01 PP02 PP04 PP05 PP06

Claims (11)

[Claims] 1. A motor for rotating a rotor by sequentially switching and driving coils of a plurality of phases, the first and second member structures each including a first member serving as a stator and the other serving as a rotor. And one of the second member structures extends axially along a peripheral surface facing the other member structure and is formed between a plurality of slots around which the coil is wound and an adjacent slot. The other of the first and second member structures includes a plurality of magnetic poles, and the other of the first and second member structures includes a laminated plate formed of a non-magnetic material and stacked in the axial direction, and along a peripheral surface facing one member structure. A magnetic piece, each of which is arranged magnetically independently in the circumferential direction, wherein the magnetic piece magnetically couples the two magnetic poles when opposed to two adjacent magnetic poles,
A motor, wherein when a current is supplied to the coil, a torque is generated by magnetic flux of a magnetic circuit generated between the two magnetic poles and the magnetic piece. 2. The magnetic piece is provided with a claw, and the magnetic piece is coupled to the laminate by engaging the claw with a notch provided in the laminate. A motor that satisfies claim 1. 3. The motor according to claim 1, wherein the magnetic piece is connected to the laminate by fixing a pin inserted through the magnetic piece to the laminate. 4. The first and second member structures of the magnetic body piece, wherein the other of the first and second member structures is located on the inner peripheral side of one of the first and second member structures. 2. A motor according to claim 1, wherein a concave portion is provided on the other inner peripheral surface of the motor. 5. The laminated plate comprises a first laminated plate having projections, and a second laminated plate also having projections and having a smaller surface area than the first laminated plate, and the magnetic material piece has projections. The first magnetic piece is constituted by a second magnetic piece which also has a projection and has a larger surface area than the first magnetic piece, and the projection of the first laminated plate and the projection of the second magnetic piece are engaged with each other. And the projection of the first magnetic piece and the projection of the second magnetic piece are engaged, and the projection of the first laminate and the projection of the second laminate are engaged. A motor that satisfies claim 1. 6. A motor that includes first and second member structures, one of which is a stator and the other of which is a rotor, and which rotates a rotor by sequentially switching and driving a plurality of phase coils. And one of the second member structures extends axially along a peripheral surface facing the other member structure and is formed between a plurality of slots around which the coil is wound and an adjacent slot. The other of the first and second member structures includes a plurality of magnetic poles, and the other of the first and second member structures is formed of a plurality of pin members formed of a non-magnetic material that is erected and fixed in the axial direction along the circumferential direction. A plurality of magnetic material pieces, each being magnetically independently arranged in a circumferential direction along a peripheral surface facing one of the member structures, the magnetic material pieces being adjacent to each other. Two magnetic poles A motor that magnetically couples the two magnetic poles when facing each other, and generates torque by magnetic flux of a magnetic closed circuit generated between the two magnetic poles and the magnetic piece when the coil is energized; . 7. A motor according to claim 6, wherein both ends of said plurality of pin members are respectively fixed to end plates fixed to the other member structure. 8. A motor for rotating a rotor by sequentially switching and driving a plurality of phases of coils, the first and second member structures each including a first member serving as a stator and the other serving as a rotor. And one of the second member structures extends axially along a peripheral surface facing the other member structure and is formed between a plurality of slots around which the coil is wound and an adjacent slot. The other of the first and second member structures includes a plurality of magnetic poles, and the other of the first and second member structures is a base having a substantially annular shape. A plurality of magnetic material pieces, and a plurality of radially extending beams connecting the base and the plurality of magnetic material pieces are provided, and a plate integrally formed of a magnetic material is axially moved. Stacked product A layer plate, wherein when the magnetic body piece portion faces two adjacent magnetic poles, the two magnetic poles are magnetically coupled to each other, and when the coil is energized, the two magnetic poles and the magnetic body piece are connected to each other. A motor, wherein torque is generated by magnetic flux of a magnetic circuit generated therebetween. 9. The motor according to claim 8, wherein both ends of the laminated plate in the axial direction are fixed to end plates fixed to the other member structure, respectively. 10. The plate includes a plurality of connecting portions that connect the magnetic piece pieces adjacent to each other in a circumferential direction.
10. The motor according to claim 8, wherein the connection portion is subjected to a demagnetization reforming process. 11. The method according to claim 8, wherein the beam portion has been subjected to a demagnetization reforming process.
Motor that satisfies the terms.