WO2006115071A1

WO2006115071A1 - Magnetic force rotation device

Info

Publication number: WO2006115071A1
Application number: PCT/JP2006/307841
Authority: WO
Inventors: Osamu Matama; Hiroshi Kuroki
Original assignee: Konishi Co., Ltd.
Priority date: 2005-04-19
Filing date: 2006-04-13
Publication date: 2006-11-02

Abstract

A magnetic force rotation device comprising a rotor (10) supported on a rotary shaft (1), at least a pair of permanent magnets (4) arranged proximately or contiguously to each other in the circumferential region of the rotor (10) with the surfaces intersecting the rotational direction used as magnetic poles and the magnetic poles (4a) of the same polarity facing each other, and a core (7) opposing the outer circumferential surface of the rotor (10) through an air gap and having a plurality of salient pole portions (12) along the rotational direction of the rotor (10), wherein the device is further provided with an electromagnet (stator) (9) arranged to generate an electromagnetic field of the opposite polarity between adjacent salient pole portions (12) by winding a driving coil (8) around the salient pole portion (12) of the core (7), and the rotor (10) is rotated by utilizing the repulsion force between a static magnetic field of the permanent magnet (4) of the rotor (10) and an electromagnetic field generated from the plurality of salient pole portions (12) of the core (7). Consequently, the size of the device is reduced and its rotation control is facilitated.

Description

Specification

Magnetic rotating device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a magnetic rotating device that rotates using a repulsive force between a static magnetic field of a permanent magnet provided in a rotor and an electromagnetic field generated in a stator, and more specifically, the iron core of the stator is The present invention relates to a magnetic rotating device which has a plurality of salient pole portions facing the outer peripheral surface of the rotor and is provided along the rotating direction to facilitate downsizing and rotation control of the device. Background art

As shown in FIGS. 13 and 14, a conventional magnetic rotating device includes first and second rotors 2 and 3 that are supported by the same rotating shaft 1 and are provided apart from each other in the axial direction. For example, the N pole is positioned on the outer peripheral surface of the circumferential area of the first rotor 2, and the S pole is positioned on the rotation center side, for example, obliquely with respect to the radial line of the first rotor 2. For example, the S pole is positioned on the outer peripheral surface of the circumferential region of the second rotor 3 and the N pole is positioned on the rotation center side, for example, so that the radial line of the second rotor 3 is positioned. A plurality of permanent magnets 4 arranged at an angle to each other and two I-shaped iron cores 7 are wound with a drive coil 8 to form first and second salient pole parts 5 and 6, respectively. The opposite sides of the first and second rotors 2 and 3 are connected by a yoke 26, and the first and second salient pole portions 5 and 6 are provided in the axial direction along the rotary shaft 1. That The first and second rotors 2 and 3 are provided with a magnet 9 facing the outer peripheral surface of the first and second rotors 2 and 3 with a gap therebetween, and the drive coil 8 is energized to generate N polarity in the first salient pole 5 By repelling the N pole of the permanent magnet 4 located on the outer peripheral surface of the first rotor 2 and generating the S polarity at the second salient pole 6, the second rotor 3 The permanent magnet 4 rotates on the outer peripheral surface while repelling it with the south pole (see, for example, Patent Document 1).

Patent Document 1: Japanese Patent No. 2968918

Disclosure of the invention

Problems to be solved by the invention

However, in such a conventional magnetic rotating device, as shown in FIG. 13, the first and second rotors 2 and 3 side of the two I-shaped iron cores 7 are connected to the yoke 26. Connect to each other with Since the first and second salient pole portions 5 and 6 of each iron core 7 are opposed to the first and second rotors 2 and 3 provided in the axial direction of the rotating shaft 1, A closed magnetic circuit as shown by an arrow is formed, and the magnetic flux generated in the first and second salient pole portions 5 and 6 can be concentrated on the outer peripheral surfaces of the first and second rotors 2 and 3, Although the magnetic efficiency can be improved, since the first and second salient pole portions 5 and 6 are arranged along the rotation axis 1 in the axial direction, it is difficult to reduce the size of the apparatus.

[0004] Also, in the conventional magnetic rotating device, as shown in FIG. 14, the rotating force mainly includes the static magnetic field of the permanent magnet 4 and the electromagnet 9 of the first and second rotors 2 and 3. Because it is based on the repulsive force with the electromagnetic field, it was difficult to control the rotation speed, and there was a tendency to run away at a higher rotation speed.

[0005] Therefore, an object of the present invention is to provide a magnetic rotating device that addresses such problems and facilitates downsizing and rotation control of the device.

Means for solving the problem

[0006] In order to achieve the above object, a magnetic rotating device according to the present invention includes a rotor supported by a rotating shaft, and a circumferential region of the rotor, the surfaces intersecting the rotation direction as magnetic poles and having the same polarity. The at least one pair of permanent magnets arranged close to or adjacent to each other with their magnetic poles facing each other and an outer peripheral surface of the rotor are opposed to each other with a gap, and a plurality of protrusions are arranged along the rotation direction of the rotor. A stator having an iron core having a pole portion and winding a drive coil around the salient pole portion of the iron core so as to generate an electromagnetic field of opposite polarity between adjacent salient pole portions, and the rotor The rotor is rotated by utilizing a repulsive force between a static magnetic field of the permanent magnet and electromagnetic fields generated from a plurality of salient pole portions of the stator.

[0007] With such a configuration, at least the circumferential region of the rotor supported by the rotation shaft is disposed adjacent to or adjacent to each other so that the surfaces that intersect the rotation direction are the magnetic poles and the same polarity magnetic poles face each other. An iron core having a plurality of salient pole portions along the rotation direction of the rotor is opposed to the static magnetic field of the pair of permanent magnets with a gap between the outer peripheral surface of the rotor and the rotor core. A drive coil is wound around the pole portion so that an electromagnetic field of opposite polarity is generated between adjacent salient pole portions, and the electromagnetic field generated from the plurality of salient pole portions is repelled to rotate the rotor. [0008] In addition, a plurality of pairs of permanent magnets of the rotor are provided at a predetermined interval along the rotation direction in a circumferential region of the rotor, and one salient pole portion of the iron core is provided with a rotor at the rotor. A line connecting an intermediate position between the pair of permanent magnets adjacent to the tip of the other salient pole part and the rotation center of the rotor when facing one of the pair of permanent magnets. The shape is located on the extension line. As a result, a plurality of pairs of permanent magnets are provided in the circumferential region of the rotor at predetermined intervals along the rotation direction, and one salient pole portion of the iron core is formed by any one pair of permanent magnets of the rotor. When facing the opposite magnetic pole part, the shape of the other salient pole part is located on the extension line of the line connecting the intermediate position of the pair of permanent magnets and the rotation center of the rotor. The rotor is rotated by repelling the electromagnetic field generated from the plurality of salient pole portions of the iron core of the stator.

[0009] Further, a control device is provided connected to the drive coil, and when the magnetic pole portions of the pair of permanent magnets face each other pass through the tip of one salient pole portion of the iron core by the control device. The drive coil is energized, and the magnetic pole portions of the pair of permanent magnets face each other before passing through the tip of another salient pole portion positioned forward in the rotational direction of the rotor by the iron core. The energization is canceled. As a result, the control coil connected to the drive coil energizes the drive coil to generate a repulsive force when the opposing magnetic pole portions of the pair of permanent magnets pass through the tip of one salient pole portion of the iron core. The drive coil is de-energized before the opposing magnetic pole portions of the pair of permanent magnets pass through the tip of another salient pole portion positioned forward of the rotor in the iron core.

[0010] Further, the stator iron core is surrounded by the rotor inside, and the outer peripheral side is magnetically connected to each other V, and a plurality of iron cores are arranged along the rotation direction of the rotor on the inner peripheral side. A plurality of sets of salient poles are provided at predetermined intervals. As a result, the rotor is placed inside and the outer peripheral side is magnetically connected to each other, and a plurality of salient pole portions are set at a predetermined interval along the rotation direction of the rotor on the inner peripheral side. An electromagnetic field is generated by the iron core of the stator.

[0011] And, the iron core of the stator has a larger gap between the outer peripheral surface of the rotor and the plurality of salient poles than the other salient pole part, which is larger than the other salient pole part. It was formed as follows. As a result, the gap between the outer peripheral surface of the rotor and the plurality of salient pole parts is smaller than the one salient pole part. An electromagnetic field having a polarity opposite to that of the one salient pole part is generated at another salient pole part located adjacently so as to be large.

The invention's effect

[0012] According to the invention of claim 1, by providing a plurality of salient pole portions of the iron core of the stator along the rotation direction of the rotor with a gap between the outer peripheral surface of the rotor and The thickness of the device can be reduced. Therefore, the apparatus can be reduced in size. In this case, the electromagnetic fields of the plurality of salient poles provided along the rotation direction of the rotor and the static magnetic fields of the permanent magnets of the rotor can be repelled. A large rotational force can be obtained by adding the repulsive force. In addition, since the pair of permanent magnets has a surface that intersects the rotation direction as a magnetic pole, and the magnetic poles of the same polarity face each other in close proximity or adjacent to each other, the strength of the static magnetic field that appears on the outer peripheral surface of the rotor is large. In addition, it is possible to obtain a larger rotational force than before. In addition, an electromagnetic field of opposite polarity is generated between adjacent salient poles, so that the salient poles magnetized to the same polarity as the magnetic poles of the permanent magnet appearing on the outer peripheral surface of the rotor repel each other. Thus, when the rotor rotates, the magnetic poles of the permanent magnets are attracted to the salient poles magnetized in the opposite polarity, and braking is applied, thereby preventing runaway of the rotor and facilitating rotation control. it can.

[0013] According to the invention of claim 2, a plurality of pairs of permanent magnets are provided in the circumferential region of the rotor at predetermined intervals along the direction of rotation, and the stator is one salient pole portion of the iron core. Is a line connecting an intermediate position between a pair of permanent magnets adjacent to the tip of the other salient pole part and the center of rotation of the rotor when the opposite magnetic pole part of the rotor permanent magnet faces each other. By adopting the shape located on the extension line, the static magnetic field generated by a plurality of pairs of permanent magnets appearing on the outer peripheral surface of the rotor and the electromagnetic field generated by the plurality of salient pole force of the stator can be repelled. Therefore, a larger rotational force can be obtained. In addition, since a plurality of pairs of permanent magnets are arranged along the rotation direction of the rotor, the rotational force can be applied to a plurality of locations in the circumferential direction of the rotor, and the rotation can be made smooth. it can.

[0014] Further, according to the invention of claim 3, a control device is provided that is connected to the drive coil, and the magnetic pole portions of the pair of permanent magnets facing each other by the control device are the tip of one salient pole portion of the iron core. Energize the drive coil as it passes through the ends, so that the pair of permanent magnets By turning off the energization of the drive coil before the part passes through the tip of the other salient pole part located in front of the rotor in the direction of rotation of the rotor, the pair of permanent magnets of the rotor face each other. It is possible to prevent the magnetic pole portion from being attracted to the other salient pole portion of the stator core and to apply braking, thereby enabling high-speed rotation.

[0015] Furthermore, according to the invention of claim 4, the stator iron core is surrounded with the rotor inside, the outer peripheral sides are magnetically connected to each other, and the rotor rotates on the inner peripheral side thereof. The stator structure can be strengthened by forming a plurality of salient pole portions as a set along the direction with a plurality of sets at a predetermined interval. In addition, since a plurality of sets of salient pole portions can be integrally formed, assembly accuracy can be improved. Therefore, it is possible to easily manufacture a larger apparatus or a multipolar apparatus. Furthermore, since the stator is integrally formed surrounding the rotor, the electromagnetic field generated by the iron core force can be confined inside the stator, and the leakage of magnetic flux can be suppressed.

[0016] According to the invention of claim 5, the space between the outer peripheral surface of the rotor and the plurality of salient pole portions is the gap between the other salient pole portions positioned adjacent to the one salient pole portion. By forming it so as to be larger, the rotor can always be stopped at rest while the magnetic pole portions of the pair of permanent magnets facing each other are attracted to the salient pole portion. Therefore, if an electromagnetic field having the same polarity as the polarity of the magnetic pole of the permanent magnet is generated at the one salient pole portion, the rotor can be easily started to rotate.

Brief Description of Drawings

FIG. 1 is a side view showing an embodiment of a magnetic rotating device according to the present invention.

FIG. 2 is a cross-sectional view taken along line XX in FIG.

FIG. 3 is a plan view showing one shape of an iron core of an electromagnet of the magnetic rotating device.

FIG. 4 is a block diagram showing a configuration example of a control device used in the magnetic rotating device.

FIG. 5 is a main part enlarged explanatory view showing a position detecting means of the magnetic rotating device.

FIG. 6 is a timing chart showing excitation timing by the electromagnet of the magnetic rotating device.

FIG. 7 is a flowchart illustrating rotation control of the magnetic rotating device.

[Fig.8] High rotational speed during startup, steady operation, and steady operation of the magnetic rotating device 6 is a timing chart for explaining rotation control when it fluctuates to the side.

FIG. 9 is an explanatory diagram showing another pulse waveform of the drive current supplied to the magnetic rotating device.

(A) shows the pulse waveform and (b) shows the current flowing through the drive coil.

FIG. 10 is a front sectional view showing another embodiment of the iron core in the electromagnet of the magnetic rotating device according to the present invention, where (a) shows an example in which the central salient pole part has four poles, and (b) shows the central salient pole part. This is an octupole example.

FIG. 11 is a front sectional view showing another arrangement example of permanent magnets in the rotor of the magnetic rotating device according to the present invention.

FIG. 12 is a diagram showing another configuration example of the position detecting means in the magnetic rotating device according to the present invention, where (a) is a side cross-sectional view and (b) is a main portion taken along the line Z-Z in (a). FIG.

FIG. 13 is an enlarged side view showing a main part of a conventional magnetic rotating device.

14 is a cross-sectional view taken along line YY in FIG.

Explanation of symbols

[0018] 1 ... Rotating shaft

4 ... Permanent magnet

4a… Magnetic pole

7 ... Iron core

8 ... Drive coil

9 ... Electromagnet (stator)

10 ... Rotor

12

13 ··· Central salient pole (one salient pole)

13a… tip

14 ·· 'End salient pole (other salient pole)

14a ... tip

16 ··· Control device

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows the present invention. FIG. 2 is a side view showing an embodiment of the magnetic rotating device according to the present invention, and FIG. This magnetic rotating device rotates using the repulsive force between the static magnetic field of the permanent magnet provided in the rotor and the electromagnetic field generated in the stator. The rotor 10, the permanent magnet 4, the electromagnet 9 And comprising.

[0020] The rotor 10 is rotatably supported by a rotating shaft 1, and the rotating shaft 1 is held by a bearing portion 11 provided in a housing (not shown) so as to be rotatable. . The rotor 10 is formed in a disk shape or a column shape having a predetermined radius (in FIG. 1, it is shown as a column shape).

On the rotor 10, as shown in FIG. 2, at least a pair of permanent magnets 4 is provided in the circumferential area thereof. The permanent magnet 4 generates a static magnetic field and gives a rotational force to the rotor 10 by a repulsive force with an electromagnetic field generated from a salient pole portion 12 of an iron core 7 of an electromagnet 9 described later. Made of thick plate-like magnetic members, as shown in Fig. 2 (b), the surface intersecting the rotation direction indicated by the arrow is the magnetic pole 4a, and the magnetic poles 4a of the same polarity, for example, N poles are arranged facing each other. It is installed. In this embodiment, as shown in FIG. 2A, eight pairs of permanent magnets 4 are arranged so as to be shifted from each other by 45 degrees in the circumferential direction.

In FIG. 2, the pair of permanent magnets 4 are arranged so that the central axes of the permanent magnets 4 are parallel to each other with the radial line of the rotor 10 in between. It should be noted that the pair of permanent magnets 4 is arranged such that the center axis of each permanent magnet 4 intersects with the rotation center of the rotor 10.

By arranging the pair of permanent magnets 4 so as to face each other as described above, the static magnetic field strength appearing on the outer peripheral surface of the rotor 10 is superimposed on the magnetic field generated from each permanent magnet 4. 4 is the maximum at the intermediate position of the facing magnetic poles 4a, and about 1.5 times the strength can be obtained as compared with the case where only one permanent magnet 4 is arranged.

In the vicinity of the outer side of the rotor 10, an electromagnet 9 is disposed so as to face the outer peripheral surface of the rotor 10 with a gap. The electromagnet 9 generates an electromagnetic field repelling the static magnetic field generated from the magnetic pole 4a (see (b) of FIG. 2) facing the pair of permanent magnets 4, and the rotor 10 For example, a drive coil 8 is wound around a central salient pole portion 13 (-salient pole portion) located at the center of an iron core 7 having three salient pole portions 12 along the rotation direction. An electromagnetic field of opposite polarity is generated between the salient pole portion 13 and the end salient pole portion 14 (the other salient pole portion) provided adjacent thereto. And this electromagnet 9 becomes a stator.

Specifically, as shown in FIG. 3, the electromagnet 9 includes a bolt nut 25 (see FIG. 3) formed by laminating a plurality of substantially E-shaped iron materials and penetrating them in the thickness direction. 1 or FIG. 2) to form an iron core 7 having a salient pole portion 12 as shown in FIG. 2, and a drive coil 8 in which a coil is wound around, for example, a bobbin at a central salient pole portion 13 of the iron core 7. It is formed by wearing. The electromagnet 9 is arranged so that the center line B of the central salient pole portion 13 of the iron core 7 matches the radial line of the rotor 10 and is opposed to the outer peripheral surface of the rotor 10 with a gap. It is installed.

In this case, the iron core 7 has a magnetic pole 4a in which the tip 13a of the central salient pole portion 13 faces the pair of permanent magnets 4 as shown in FIG. 2 (a) (see FIG. 2 (b)). The shape is located on the extension C of the line connecting the intermediate position of the pair of permanent magnets 4 adjacent to the tip 14a of the end salient pole part 14 and the rotation center of the rotor 10 It is said that. As a result, the static magnetic field generated by the plural pairs of permanent magnets 4 appearing on the outer peripheral surface of the rotor 10 and the electromagnetic field generated from the central salient pole portion 13 and the end salient pole portion 14 can be repelled. The force can be added to obtain a larger rotational force. The shape of the iron core 7 is not limited to the shape having three salient pole portions 12 and having a substantially E shape, but having two salient pole portions 12 and having a substantially U shape. Also good.

[0027] Further, in the iron core 7, the end salient pole portion 14 where the gap between the outer peripheral surface of the rotor 10 and the plurality of salient pole portions 12 is located adjacent to the central salient pole portion 13 is larger. It is formed to become. Thus, when stationary, the rotor 10 can always be stopped in a state where the portion of the magnetic pole 4a facing the pair of permanent magnets 4 is attracted to the tip 13a of the central salient pole portion 13. Therefore, if an electromagnetic field having the same polarity as that of the magnetic pole 4a of the permanent magnet 4 is generated in the central salient pole portion 13, for example, N polarity, the rotor 10 can be easily started to rotate.

A control device 16 is connected to the drive coil 8 of the electromagnet 9. The control device 16 energizes the drive coil 8 when a portion of the magnetic pole 4a facing the pair of permanent magnets 4 passes through the tip 13a of the central salient pole portion 13 of the iron core 7, and the pair of permanent magnets 4 direction Control is performed so that the energization of the drive coil 8 is canceled before the tightly-connected magnetic pole 4a passes through the tip 14a of the end salient pole portion 14 positioned forward in the rotation direction of the rotor 10 by the iron core 7. As shown in FIG. 4, the apparatus includes a position detection means 17, a control unit 18, a drive unit 19, a calculation unit 27, a storage unit 28, and an operation unit 29.

[0029] Here, the position detecting means 17 is such that the intermediate position of the opposing magnetic poles 4a of the pair of permanent magnets 4 shown in Fig. 2 passes on the center line B of the central salient pole portion 13 of the iron core 7. For example, as shown in FIG. 1, a slit disk 20 is provided on one side of the rotor 10 so as to be supported by the rotary shaft 1 and rotate integrally with the rotor 10, and the slit disk 20 A light-emitting element 21 and a light-receiving element 22 are provided on both sides with a slit disk 20 in between. The light emitting element 21 and the light receiving element 22 are fixedly disposed on the casing.

[0030] As shown in FIG. 5, the slit disk 20 has a slit 23 having a predetermined width at the periphery thereof, and one end of the slit 23 (hereinafter referred to as "rotation direction head"). 23a is aligned with the approximate center of the permanent magnet 4 on the leading side in the rotational direction indicated by the arrow A in the pair of permanent magnets 4 disposed on the rotor 10, and the other end (hereinafter referred to as the “tail portion in the rotational direction”). 23b is positioned substantially at the center of the permanent magnet 4 at the tail in the rotational direction indicated by the arrow A of the rotor 10. Further, the light emitting element 21 and the light receiving element 22 are arranged at a position separated from the center line B of the central salient pole portion 13 of the iron core 7 by a distance L on the front side in the rotation direction indicated by the arrow A, by the distance L. It is arranged corresponding to the area. In this case, when the slit 23 passes between the light emitting element 21 and the light receiving element 22, the light emitted from the light emitting element 21 passes through the slit 23 and is received by the light receiving element 22. As a result, an analog detection signal as shown in FIG.

The control unit 18 is connected to the position detection unit 17 and the drive unit 19 and generates a control signal for controlling the drive unit 19 based on a detection signal input from the position detection unit 17. As shown in FIG. 6 (b), when the detection signal of the light receiving element 22 is wave-shaped with a predetermined threshold value and the leading portion 23a in the rotation direction of the slit 23 formed in the slit disk 20 is detected. When a rising edge 23b in the rotational direction is detected, a falling pulse-like control signal is obtained and output to the drive section 19.

In addition, the drive unit 19 drives the electromagnet 9 and drives the control unit 18 and the electromagnet 9. As shown in FIG. 6 (c), a drive current is generated in response to a control signal input from the control unit 18 and supplied to the drive coil 8 of the electromagnet 9 as shown in FIG. Energize and de-energize! / Speak.

[0033] The calculation unit 27 calculates the ON time and OFF time of the drive current during steady operation and the ON time and OFF time of the position detection means. For example, the operator operates a key (not shown). The rotational speed n at the time of steady operation inputted in the above, the diameter D of the rotor 10 shown in FIG. 2 (b), which is the design value of the device stored in advance in the storage unit 28 described later, and the pair of permanent magnets 4 Each time is calculated based on the distance W between the centers and the arrangement pitch P along the outer circumferential surface of the rotor 10 of the pair of permanent magnets 4.

[0034] Further, the storage unit 28 temporarily stores the design value of the device and each time calculated by the calculation unit 27, and includes a memory. The operation unit 29 is used to input the start and stop of the apparatus, the drive rotation speed, and the like. For example, key input is possible.

Next, the operation of the magnetic rotating device of the present invention configured as described above will be described. When the rotor 10 rotates and the portion of the magnetic pole 4a facing the pair of permanent magnets 4 arranged in the circumferential region of the rotor 10 passes the tip 13a of the central salient pole portion 13 of the electromagnet 9, the rotor 10 rotates. The slit 23 of the slit disk 20 of the position detecting means 17 that rotates integrally with the child 10 passes through the arrangement part of the light emitting element 21 and the light receiving element 22. At this time, light from the light emitting element 21 passes through the slit 23 and is received by the light receiving element 22, and an analog detection signal as shown in FIG. 6A is sent from the light receiving element 22 to the control unit 18. The control unit 18 shapes the detection signal with a predetermined threshold and generates a pulse-like control signal that rises when the rotation direction leading end 23a of the slit 23 is detected and falls when the rotation direction tail 23b is detected. Obtained and output to the drive unit 19. The drive unit 19 generates a drive current having a waveform as shown in (c) of FIG. 6 based on a control signal input from the control unit 18 and supplies the drive current to the drive coil 8 of the electromagnet 9 to excite the electromagnet 9. And release the excitation.

In this case, when a drive current is applied from the drive unit 19 to the drive coil 8 in the central salient pole portion 13, the electromagnet 9 is excited as shown in FIG. (I period shown in Fig. 6 (g)). Even if the drive current is de-energized, N The magnetized state is maintained (II period shown in Fig. 6 (g)). Here, in the period I, the portion facing the tip 13a of the central salient pole 13 is in the vicinity of the magnetic pole 4a facing the permanent magnet 4, so the polarity appearing on the outer peripheral surface of the rotor 10 is As shown on the time axis in Fig. 6 (d), it has N polarity. Therefore, as shown in FIG. 6 (f), during the period I, the repulsive force due to the N polarity of the electromagnetic field generated from the central salient pole portion 13 and the N polarity in the vicinity of the opposing magnetic pole 4a of the permanent magnet 4 Will occur.

[0037] In addition, since the central salient pole portion 13 is opposed to the central salient pole portion 13 in the period II described above because it is the side surface on the S polarity side of the permanent magnet 4 located behind the pair of permanent magnets 4 in the rotor 10 The polarity that appears on the outer peripheral surface of S is the S polarity as shown on the time axis in Fig. 6 (d). Therefore, as indicated by a solid line in FIG. 6 (f), an attractive force is generated by the N polarity of the residual magnetic field generated at the central salient pole portion 13 and the S polarity of the permanent magnet 4 during the period II.

Similarly, the end salient pole portion 14 is excited when the drive current is supplied from the drive portion 19 to the drive coil 8 and the electromagnet 9 is excited as shown in FIG. 6 (e). It is magnetized to S polarity opposite to 13 (I period shown in Fig. 6 (g)). Even when the drive current is de-energized, the S magnetic field is maintained for a certain period due to the residual magnetic field (II period shown in Fig. 6 (g)). Here, since the end salient pole portion 14 faces the intermediate portion between the pair of adjacent permanent magnets 4 during the period I, the polarity appearing on the outer peripheral surface of the rotor 10 is shown in FIG. S polarity as shown on the time axis of e). Therefore, as shown in FIG. 6 (f), the I period is repulsive due to the S polarity of the electromagnetic field generated at the end salient pole portion 14 and the S polarity of the intermediate portion of the pair of adjacent permanent magnets 4. Force is generated.

[0039] In addition, the end salient pole portion 14 facing the end salient pole portion 14 in the period II is the vicinity of the magnetic pole on the S pole side of the permanent magnet 4 located on the leading side in the rotational direction of the pair of permanent magnets 4. The polarity that appears on the outer peripheral surface of the rotor 10 is the S polarity as shown on the time axis of FIG. 6 (e). Therefore, as indicated by the broken line (f) in Fig. 6, a repulsive force is generated between the S polarity of the residual magnetic field generated at the end salient pole 14 and the S polarity of the permanent magnet 4 during the period II. .

Thus, during the period I, the rotor 10 rotates due to the repulsive force between the electromagnetic field generated at the central salient pole portion 13 and the end salient pole portion 14 of the electromagnet 9 and the static magnetic field of the permanent magnet 4. Also, during period II, the arch by the residual magnetic field generated at the central salient pole 13 of the electromagnet 9 and the static magnetic field of the permanent magnet 4a I The rotor 10 rotates due to the force and the repulsive force between the residual magnetic field generated at the end salient pole 14 and the static magnetic field of the permanent magnet 4. In addition, on the time axes of (d) and (e) in FIG. 6, the polarity of the static magnetic field by the permanent magnet 4 appearing on the outer peripheral surface of the rotor 10 is shown corresponding to each time!

Next, period III shown in FIG. 6 (g) is a period in which the electromagnetic field generated by energization of the electromagnet 9 is zero. However, during this period III, a back electromotive force is generated in the drive coil 8 because the static magnetic field of the permanent magnet 4 of the rotor 10 cuts the drive coil 8. Therefore, a current in the direction opposite to the energization direction flows through the drive coil 8 due to the back electromotive force, and the central salient pole portion 13 is magnetized to the S polarity as shown in FIG. 6 (d). It will be. Therefore, this period III is between the S polarity generated at the central salient pole 13 and the S polarity due to the permanent magnet 4 appearing on the outer peripheral surface of the rotor 10 as shown by the solid line in FIG. As a result, a repulsive force is generated and the rotor 10 rotates.

Similarly, the end salient pole portion 14 is magnetized to N polarity as shown in FIG. 6E by the back electromotive force current. Therefore, among these III periods, the Ilia period, in particular, is the outer peripheral surface of the rotor 10 shown on the time axis in the same figure as the N polarity generated at the end salient pole 14 as shown by the broken line in FIG. An attraction force is generated between the S polarity that appears above and the rotor 10 rotates. Also, during the Illb period, as shown by the solid line, a repulsive force is generated between the N polarity generated at the end salient pole portion 14 and the N polarity that appears on the outer peripheral surface of the rotor 10, and the rotor 10 rotates. To do. Furthermore, during the period IIIc, as shown by the broken line, an attraction force is generated between the N polarity generated at the end salient pole portion 14 and the S polarity appearing on the outer peripheral surface of the rotor 10, and the rotor 10 rotates. To do.

[0043] Thus, during period III, as shown in FIG. 6 (f), the electromagnetic field due to the back electromotive force current generated in the central salient pole portion 13 and the end salient pole portion 14 and the rotor 10 The rotor 10 is rotated by the repulsive force and attractive force with the static magnetic field due to the permanent magnet 4 appearing on the outer peripheral surface of the rotor. Then, due to the rotation of the rotor 10, when the portion of the magnetic pole 4 a facing the pair of adjacent permanent magnets 4 passes through the tip 13 a of the central salient pole portion 13, the drive coil 8 is energized again and the electromagnet 9 is excited. The above operation is repeated.

Next, rotation control of the magnetic rotating device of the present invention will be described with reference to FIG. 7 and FIG. Here, first, the control at the time of activation will be described. In this case, first, when the operator operates the operation unit 29 and inputs the rotation speed n at the time of steady operation, in step S1, the data of the diameter D of the rotor 10 stored in advance in the storage unit 28, a pair of permanent Magnet 4 The data of the distance W between the center lines of each magnet and the data of the arrangement pitch P along the outer peripheral surface of the rotor 10 of the pair of permanent magnets 4 (see (b) in FIG. 2) are read from the storage unit 28, On the basis of the data and the input data of the rotational speed n, the 0 temple 1; 1 of the position detecting means 17 during steady operation and the OFF time t2 are calculated in the control unit 18 of the control device 16. The result is stored in the temporary storage unit 28.

In addition, the ON time T1 of the pulsed drive current (hereinafter referred to as “drive current pulse”!) Is set to a time shorter than the ON time tl of the position detection means 17 by a predetermined rate, and the drive The driving current OFF time T2 is calculated by the calculating unit 27 of the control device 16 so that the ON period of the current pulse is the same as the ON period (tl + t2) of the position detecting means 17. The result is temporarily stored in the storage unit 28.

[0046] In step S2, when the operator operates the operation unit 29 to turn on the start key, the drive unit 19 turns on the drive current pulse using that as a trigger, and the drive current is supplied to each drive coil 8. Is done. Here, when the apparatus is stopped, the rotor 10 stops in the state shown in FIG. 2 because the pair of permanent magnets 4 and the central salient pole portion 13 of the iron core 7 are attracted to each other! Therefore, when a drive current pulse is supplied to the drive coil 8 and the central salient pole portion 13 is excited and magnetized, for example, to the N pole, the rotor 10 becomes N of the pair of permanent magnets 4. The rotation starts by the repulsive action of the pole and the N pole of the central salient pole part 13 above.

[0047] In step S3, the drive current pulse ON time T1 calculated in step S1 is read from the storage unit 28, and the elapsed time after the drive current pulse ON execution is monitored, and the T1 time has passed. The controller 18 determines whether or not the force is applied. When the time T1 elapses and a “YES” determination is made, the process proceeds to step S4 where the drive current pulse is turned off.

[0048] In step S5, the OFF time T2 calculated in step S1 is read from the storage unit 28, the elapsed time after the OFF execution of the drive current pulse is monitored, and the control unit determines whether or not the T2 time has elapsed. Judge by 18. When the time T2 elapses and the determination is “YES” (see point a in FIG. 8B), the process proceeds to step S6.

[0049] In step S6, the control unit 18 determines whether or not the position detection means 17 is OFF.

Usually, at the time of start-up, since the rotation speed is slow, the next pair of permanent magnets 4 will not reach the position detection means 17 within the time T2. Therefore, drive in step S4 The output of the position detection means 17 after the elapse of T2 after the current pulse is turned OFF is OFF as indicated by a point b in FIG. Therefore, step S6 is “YES” determination and the process proceeds to step S8.

[0050] Note that, when the load is heavy and the start-up at startup is extremely slow, the tail of the pair of permanent magnets 4 in the rotation direction of the N-polar region, for example, of the pair of permanent magnets 4 passes the detection position of the position detection means 17 even after the elapse of T2. There may not be. In this case, since the position detection means 17 is in the ON state, step S6 is “NO” determination, and the process proceeds to step S7.

[0051] In step S7, the ON time tl of the position detecting means 17 calculated in step S2 is read from the storage unit 28, and the control unit 18 determines whether or not the force has elapsed after the determination in step S6. Until the time tl elapses, step S6 and step S7 are repeatedly executed. When the position detecting means 17 is turned off within the time tl, step S6 is determined as “Y ES” and the process proceeds to step S8. move on. On the other hand, if the load is too heavy or some abnormality causes the rotor 10 to stop rotating and the position detection means 17 does not turn off even after the time tl has elapsed, step S7 is judged “YES”, indicating that there is an abnormality. Determine and stop the device.

[0052] In step S8, the control unit 18 determines whether or not the position detection means 17 is ON force. Normally, at the time of activation, the rotational speed is slow, so that the position detection means 17 is not determined to be ON immediately in step S8 after the position detection means 17 is determined to be 0 FF in step S6. Accordingly, step S8 is “NO” determination and the process proceeds to step S9.

[0053] In step S9, the OFF time t2 of the position detection means 17 calculated in step S2 is read from the storage unit 28, and the control unit 18 determines whether or not the force has passed t2 time after the determination in step S6. . Until time t2 elapses, step S8, step S9 and force S are repeatedly executed. When position detecting means 17 is turned on within time t2 (see point c in FIG. 8 (a)), step S8 is "YES" determination is made, and the process proceeds to step S10. On the other hand, if the position detection means 17 does not turn on even after t2 has elapsed, it is considered that the rotation of the rotor 10 has stopped due to some abnormality. In this case, step S9 is determined as “YES”, and it is determined as abnormal. Stop the device.

[0054] In step S10, the control unit 18 determines whether or not the operation unit 29 has been stopped by the operator. If the stop operation has not been performed, step S1 When “0” is determined, a “NO” determination is made and the process returns to step S2 to turn on the drive current pulse (see point d in FIG. 8B). Thereafter, Step S2 to Step S10 are repeatedly executed, and the rotation of the rotor 10 is accelerated to reach the rotation speed n during steady operation.

[0055] Next, control during steady operation will be described. First, in step S2, the drive current pulse is turned on. After the time T1 has elapsed, the drive current pulse is turned off in step S4. Thereafter, when the time T2 elapses (see point e in FIG. 8B), in step S6, it is determined whether or not the position detecting means 17 is OFF (see point f in FIG. 8A). Here, if the position detection means 17 is OFF and the determination is “YES”, the routine proceeds to step S8, where it is determined whether or not the position detection means 17 is ON. Further, here, when the position detecting means 17 is turned on (see point g in FIG. 8 (a)) and the determination is “YES”, the routine proceeds to step S10. If the stop operation is not performed in step S10, the process returns to step S2 and the drive current noise is turned on (see point h in FIG. 8 (b)). During steady operation, in step S4, after the drive current pulse is turned off and the force T2 has elapsed, the next pair of permanent magnets 4 reaches the position of the position detection means 17, and the position detection means 17 Since it is the moment when it changes from OFF to ON, Steps S6 to S10 are executed instantaneously (points e to h in Fig. 8 are substantially the same time), and the drive current pulse is supplied at intervals of T2 to maintain steady operation. The

[0056] Next, control when the rotation speed fluctuates to the high speed side during steady operation will be described. First, in step S2, the drive current pulse is turned ON, and after a lapse of T1 time, the drive current pulse is turned OFF in step S4. Thereafter, when time T2 elapses (see point i in FIG. 8 (b)), in step S6, it is determined whether or not the position detection means 17 is OFF. Here, when the rotational speed fluctuates to a higher speed than during steady operation, the next pair of permanent magnets 4 has already reached the position of the position detecting means 17, so the position detecting means 17 Since it is ON (see point j in Fig. 8 (a)), step S6 is “NO” determination and the process proceeds to step S7. Then, when the position detecting means 17 is turned off within the predetermined waiting time tl (see point k in FIG. 8 (a)), the process proceeds to step S8.

In step S8, it is determined whether or not the position detection means 17 is ON. In this case, since it is the moment when the position detecting means 17 is changed from ON to OFF in step S6, step S8 is “NO” determination, and the process proceeds to step S9. And the next pair of permanent magnets 4 Steps S8 to S9 are repeatedly executed until the position of the position detection means 17 is reached. When the next pair of permanent magnets 4 reaches the position of the position detection means 17, the position detection means 17 is turned ON (see point m in FIG. 8 (a)), and step S8 is “YES”. "It becomes a judgment. Then, the process returns to step S2 through step S10, and the drive current pulse is turned on (see point p in FIG. 8 (b)). In this way, when the rotational speed fluctuates faster than the speed during steady operation, the supply of the drive current pulse for one pulse indicated by the broken line is stopped. It will be returned to the speed of.

[0058] In the above description, the force described in the case of applying a pulse-shaped drive current having a time width T1 is not limited to this, and as shown in FIG. 9 (a), the time width T1 A driving current in which pulses having a predetermined width are repeatedly generated in a predetermined cycle may be applied. In general, when a pulsed drive current having a time width T1 is supplied to the drive coil 8, the current flowing through the drive coil 8 gradually increases as shown by a two-dot chain line in FIG. It does not become zero immediately after the current is turned off, but gradually decreases as shown in the figure. On the other hand, when a drive current in which a pulse having a predetermined width is repeatedly generated in a predetermined cycle within a time width T1 as shown in FIG. 9 (a) is supplied, the current flowing through the drive coil 8 is as shown in FIG. (B) in Fig. 6 is shown by a solid line, and approximates the current shown by the two-dot chain line when a drive current pulse of time width T1 is supplied. Accordingly, the magnetic energy generated in the iron core 7 can be reduced by reducing the effective value of the driving current and reducing the power consumption while securing substantially the same energy as when the driving current pulse having the time width T1 is supplied.

FIG. 10 is a front sectional view showing another embodiment of the iron core 7 in the electromagnet 9 of the magnetic rotating device according to the present invention. FIG. 10 (a) is an example in which the central salient pole portion 13 has four poles. ) Is an example where the central salient pole part 13 is octupole. The iron core 7 of the electromagnet 9 is surrounded by the rotor 10 inside, and the outer peripheral side is magnetically connected to each other, and a plurality of salient pole portions along the rotational direction of the rotor 10 on the inner peripheral side. A set of 12 is provided as a set at a predetermined interval. Then, in the plurality of salient pole portions 12 of each set, after the drive coil 8 is mounted on the central salient pole portion 13, a wedge 24 is provided near the tips of the central salient pole portion 13 and the end salient pole portion 14. The gap between both salient poles is closed, and the drive coil 8 is fixed with, for example, varnish. In this case, the rotation can be smoothed as the number of the central salient pole portions 13 increases. In the above embodiment, the case where eight pairs of permanent magnets 4 are arranged at equal intervals in the rotation direction in the rotor 10 has been described. However, the present invention is not limited to this, and any number of pairs may be used. May be.

FIG. 11 is a cross-sectional view showing another arrangement example of the permanent magnets 4 in the rotor 10 of the magnetic rotating device according to the present invention. This rotor 10 has, for example, sixteen permanent magnets 4 that are elongated along the circumferential direction with the surface intersecting the rotation direction as a magnetic pole, and the same polarity magnetic poles face each other. Are arranged adjacent to each other. In this case, for example, a bonded magnet formed by mixing a binder with magnet powder may be used as the permanent magnet 4. Bonded magnets have characteristics such as being easy to process and resistant to impact, so they can be formed along the outer peripheral surface of the rotor 10, for example, and can be easily formed even on a small rotor 10. it can. Therefore, the magnetic rotating device can be reduced in size.

FIG. 12 is a diagram showing another configuration example of the position detecting means 17 in the magnetic rotating device according to the present invention, where (a) is a side sectional view and (b) is a Z-Z line of (a). It is a principal part expansion explanatory drawing by a cross section. This position detection means 17 is a Hall element, and is provided on the front end surface of a support member 31 provided in parallel with the rotation axis 1 on the inner side surface 30a of the housing 30 as shown in FIG. The permanent magnet 4 is arranged at a predetermined distance from one end surface of the permanent magnet 4 provided in the circumferential region of the child 10. Then, as shown in FIG. 12 (b), the center line B force of the central salient pole portion 13 of the iron core 7 is also magnetically applied to the permanent magnet 4 at a position separated by a distance L on the front side in the rotational direction indicated by the arrow A. It is supposed to detect.

In the above description, the force described in the case where the excitation timings of a plurality of electromagnets 9 are simultaneously controlled based on the detection signal of one position detection means 17 is not limited to this. Position detecting means 17 may be provided corresponding to each. In this case, if each electromagnet 9 is individually controlled based on the detection signal of each position detecting means 17, the control accuracy of the excitation timing of each electromagnet 9 can be further improved.

[0064] In the above embodiment, the case where only the permanent magnet 4 is disposed on the rotor 10 has been described. However, a balancer for balancing the rotor 10 is disposed at a predetermined position. It ’s good.

Claims

The scope of the claims

[1] a rotor supported by a rotating shaft;

At least a pair of permanent magnets arranged in proximity to or adjacent to each other in the circumferential region of the rotor, with the surfaces intersecting the rotation direction as magnetic poles and facing the same polarity of magnets; and the outer circumferential surface of the rotor And an iron core having a plurality of salient pole portions along the rotation direction of the rotor, and a drive coil is wound around the salient pole portions of the iron core between adjacent salient pole portions. A stator configured to generate an electromagnetic field of opposite polarity,

A magnetic force rotating device that rotates the rotor by utilizing a repulsive force between a static magnetic field of a permanent magnet of the rotor and electromagnetic fields generated from a plurality of salient pole portions of the stator.

[2] A plurality of pairs of the permanent magnets of the rotor are provided at predetermined intervals along the rotation direction in a circumferential region of the rotor, and the stator has one salient pole portion of the rotor as a rotor. A line connecting the intermediate position of the pair of permanent magnets adjacent to the tip of the other salient pole part and the rotation center of the rotor when facing the opposite magnetic pole part of one pair of permanent magnets 2. The magnetic rotating device according to claim 1, wherein the magnetic rotating device has a shape located on an extension line of.

[3] A control device is provided that is connected to the drive coil, and when the magnetic pole portions of the pair of permanent magnets face each other pass through the tip of one salient pole portion of the iron core, the drive device The coil is energized, and the drive coil is energized before the opposing magnetic pole portions of the pair of permanent magnets pass through the tip of the other salient pole portion located forward of the rotor in the rotational direction of the iron core. The magnetic rotating apparatus according to claim 1 or 2, wherein the magnetic rotating apparatus is released.

[4] The iron core of the stator surrounds the rotor inside, and the outer peripheral sides are magnetically connected to each other, and a plurality of salient pole portions are arranged on the inner peripheral side along the rotation direction of the rotor. 4. The magnetic force rotating device according to claim 1, wherein a plurality of sets are provided at predetermined intervals as a set.

[5] The iron core of the stator is such that the gap between the outer peripheral surface of the rotor and the plurality of salient pole parts is larger in the other salient pole part positioned adjacent to the one salient pole part. The magnetic rotating device according to claim 1, wherein the magnetic rotating device is formed as follows.