JP5313627B2 - Brush-fed hybrid excitation motor and driving method of brush-fed hybrid excitation motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new kind of brush feed type hybrid excited motor the characteristics of which are easily controlled. <P>SOLUTION: The brush feed type hybrid excited motor 1 includes a stator 2 and a rotor 3. In the stator, a plurality of permanent magnets 12, the magnets of which on one side are lined up on one side in its axial direction so that they may project axially from the disklike plane of a yoke 11, and a plurality of iron cores 13 are arranged alternately. The rotor includes an annular outer exciting coil 21 and an inner exciting coil 22, which are arranged outside and inside the permanent magnets 12 and the iron cores 13 and are wound in its circumferential direction and are used to generate and control magnetic flux coming via the iron cores 13, a plurality of armature cores 32b, in its circumferential direction where armature coils 33 arranged to axially face the permanent magnets 12 and the iron cores 13 are wound, and a commutator 34, into which a brush 16 installed in the stator 2 is brought into contact and which supplies the armature coil 33 with an armature current. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a brush-fed hybrid excitation motor and a driving method of the brush-fed hybrid excitation motor.

As a motor, a hybrid excitation motor has been proposed as a motor capable of obtaining high torque at a low speed (see, for example, Patent Document 1).
In such a hybrid excitation motor, the magnetic flux can be increased / decreased by supplying a direct current to the excitation coil, and as a result, the characteristics of the motor can be controlled.
JP-A-6-351206

  However, the hybrid excitation motor as described above has only a brushless motor in which a permanent magnet is provided on the rotor side and an armature coil is provided in the stator. Therefore, realization of different types of hybrid excitation motors related to brush-fed motors has been desired.

  An object of the present invention is to provide a new type of brush-fed hybrid excitation motor and a method for driving the brush-fed hybrid excitation motor that can easily control characteristics.

In the invention described in claim 1, so as to protrude axially from a substantially disc-shaped flat portion of the yoke tubular portion protruding in the axial direction is formed on the outer edge, and a permanent magnet and a plurality of cores of several Are arranged alternately in the circumferential direction, the stator is aligned so that each permanent magnet is magnetized in the axial direction and one of the axial directions is the same magnetic pole, and the outer side in the radial direction of the permanent magnet and the iron core, An annular outer excitation coil that is arranged radially inside the cylindrical portion and wound in the circumferential direction to generate and control magnetic flux passing through the iron core, and the permanent magnet and the iron core in the axial direction Rectification for supplying armature current to the armature coil by pressing and contacting a plurality of armature core portions wound around the armature coil arranged to face each other and a brush provided on the stator a rotor having a child, the During normal operation in which no direct current is supplied to the side excitation coil, the magnetic flux passing through the iron core is directed to one side in the axial direction based on the magnetic force of the permanent magnet, and the direct current flows in one direction with respect to the outer excitation coil. , Based on the direct current, a magnetic flux loop through which the magnetic flux passes is formed, such as the iron core, the plane portion of the yoke, the cylindrical portion of the yoke, the armature core portion of the rotor, and the iron core. When a direct current is supplied to the outer excitation coil in the other direction, based on the direct current, the iron core, the armature core portion of the rotor, the cylindrical portion of the yoke, the plane portion of the yoke, A magnetic flux loop through which the magnetic flux passes is formed, such as an iron core, and the magnetic flux formed when a direct current is supplied to the outer excitation coil in the magnetic flux passing through the iron core. When the direction of the magnetic flux formed based on the magnetic force of the permanent magnet becomes the same direction, the magnetic flux passing through the iron core is increased, resulting in high torque and low rotational speed, and passing through the iron core. In the magnetic flux, when the direction of the magnetic flux formed when a direct current is supplied to the outer excitation coil and the direction of the magnetic flux formed based on the magnetic force of the permanent magnet are opposite to each other, the iron core The main point is that the characteristics of torque and rotational speed are controlled by changing the direction of the direct current supplied to the outer exciting coil by demagnetizing the magnetic flux passing through the magnetic flux, demagnetizing the magnetic flux .

According to this configuration, when a direct current is supplied to the outer exciting coil, the magnetic flux passing through the iron core provided between the permanent magnets of the stator is controlled. Specifically, the magnetic flux passing through the iron core is increased or decreased according to the direction of the direct current supplied to the outer exciting coil, and the interlinkage magnetic flux linked to the armature coil is increased or decreased. Therefore, the characteristics (torque and rotational speed characteristics) can be easily controlled in the axial gap type brush-fed motor in which the permanent magnet and the iron core and the armature core are opposed in the axial direction.

According to a second aspect of the invention, in the brush-fed hybrid excitation motor according to the first aspect, the brush-feed type hybrid excitation motor is disposed on the radially inner side of the permanent magnet and the iron core and wound in the circumferential direction, and passes through the iron core. The rotor further includes an annular inner excitation coil for generating and controlling magnetic flux, and the rotor further includes a rotating shaft that rotates integrally with the armature core and the commutator, and the outer excitation coil and the inner excitation coil. During normal operation in which no direct current is supplied to the coil, the magnetic flux passing through the iron core is directed to one side in the axial direction based on the magnetic force of the permanent magnet, and the direct current is supplied to the inner excitation coil in one direction. In this case, based on the direct current, the magnetic flux passes through the iron core, the plane portion of the yoke, the rotating shaft, the armature core portion of the rotor, the iron core, and the like. When a magnetic flux loop is formed and a direct current is supplied to the inner exciting coil in the other direction, the iron core, the armature core portion of the rotor, the rotating shaft, and the plane portion of the yoke are based on the direct current. A magnetic flux loop through which magnetic flux passes is formed, such as the iron core, and is formed when direct currents in opposite directions in the circumferential direction are supplied to the outer exciting coil and the inner exciting coil in the magnetic flux passing through the iron core. The direction of the magnetic flux to be generated is the same direction, and in the magnetic flux passing through the iron core, the direction of the magnetic flux formed when direct currents in opposite directions are supplied to the outer excitation coil and the inner excitation coil, and the permanent When the direction of the magnetic flux formed based on the magnetic force of the magnet becomes the same direction, the magnetic flux passing through the iron core is increased, resulting in high torque and low rotation. In the magnetic flux passing through the iron core, it is formed based on the direction of magnetic flux formed when direct currents in opposite directions are supplied to the outer exciting coil and the inner exciting coil and the magnetic force of the permanent magnet. When the direction of the magnetic flux is opposite, the magnetic flux passing through the iron core is demagnetized, resulting in a low torque and high rotational speed, and the direction of the direct current supplied to the outer excitation coil and the inner excitation coil is changed. The gist is that the characteristics of torque and rotational speed are controlled by changing .

According to the same configuration, the exciting coil is arranged on both the radially outer side and the inner side of the permanent magnet and the iron core. Can do. Therefore, the characteristics (torque and rotational speed characteristics) can be greatly controlled.
In the invention according to claim 3, the plurality of permanent magnets and the plurality of iron cores are alternately arranged in the circumferential direction so as to protrude in the axial direction from the substantially disk-shaped flat portion of the yoke, and each permanent magnet is axially arranged. And a stator that is aligned so that one of the axial directions is the same magnetic pole, and is disposed radially inside the permanent magnet and the iron core and is wound in the circumferential direction, and the magnetic flux that passes through the iron core A plurality of armature core portions wound in the circumferential direction around which an inner armature coil for generation and control, and an armature coil disposed so as to face the permanent magnet and the iron core in the axial direction are wound; A rotor having a commutator for supplying an armature current to the armature coil when a brush included in the stator is pressed and contacted, and a rotating shaft that rotates integrally with the armature core part and the commutator; To the inner excitation coil During normal operation in which no current is supplied, the magnetic flux passing through the iron core is directed to one side in the axial direction based on the magnetic force of the permanent magnet, and a direct current is supplied in one direction to the inner excitation coil. Based on the direct current, a magnetic flux loop is formed through which the magnetic flux passes, such as the iron core, the plane portion of the yoke, the rotating shaft, the armature core portion of the rotor, and the iron core. When a direct current is supplied in the other direction, a magnetic flux loop through which the magnetic flux passes, such as the iron core, the armature core portion of the rotor, the rotating shaft, the plane portion of the yoke, and the iron core, based on the direct current. In the magnetic flux passing through the iron core, based on the direction of the magnetic flux formed when a direct current is supplied to the inner excitation coil and the magnetic force of the permanent magnet. When the direction of the formed magnetic flux is the same direction, the magnetic flux passing through the iron core is increased, resulting in a high torque and a low rotational speed. With respect to the magnetic flux passing through the iron core, When the direction of the magnetic flux formed when a direct current is supplied and the direction of the magnetic flux formed based on the magnetic force of the permanent magnet are opposite to each other, the magnetic flux passing through the iron core is demagnetized and reduced. The gist is that the torque and the rotational speed characteristics are controlled by changing the direction of the direct current supplied to the inner excitation coil.
According to this configuration, when a direct current is supplied to the inner exciting coil, the magnetic flux passing through the iron core provided between the permanent magnets of the stator is controlled. Specifically, the magnetic flux passing through the iron core is increased or decreased depending on the direction of the direct current supplied to the inner excitation coil, and the interlinkage magnetic flux linked to the armature coil is increased or decreased. Therefore, the characteristics (torque and rotational speed characteristics) can be easily controlled in the axial gap type brush-fed motor in which the permanent magnet and the iron core and the armature core are opposed in the axial direction.

The invention according to claim 4, in the brush powered hybrid excitation motor according to claim 2 or 3, the axial center of the pre-Symbol yoke, a bearing for rotatably supporting the rotary shaft is provided, The gist is that the bearing is made of a magnetic material.

  According to this configuration, since the bearing that forms part of the magnetic circuit (magnetic path) when a direct current is supplied to the exciting coil is made of a magnetic material, the interlinkage magnetic flux can be increased or decreased efficiently.

According to a fifth aspect of the present invention, in the brush-fed hybrid excitation motor according to any one of the first to fourth aspects, the commutator is disposed radially inside the armature core portion, and the brush The main point is that they are pressed and contacted in the axial direction.

  According to this configuration, the commutator is disposed on the radially inner side of the armature core portion and pressed against the brush in the axial direction, so that the brush-fed hybrid excitation motor is reduced in size in the radial and axial directions. Can be

According to a sixth aspect of the invention, there is provided the method for driving a brush-fed hybrid excitation motor according to any one of the first to fifth aspects, wherein the direction and value of a direct current supplied to the excitation coil are changed. Thus, the gist is to control the characteristics of torque and rotational speed by controlling the magnetic flux passing through the iron core.

  According to the method of the present invention, in the method of driving an axial gap type brush-fed motor in which the permanent magnet and the iron core and the armature core portion are opposed in the axial direction, the direction and value of the direct current supplied to the exciting coil are determined. It is possible to easily control the characteristics (torque and rotational speed characteristics) simply by changing them.

  According to the present invention, it is possible to provide a new type of brush-fed hybrid excitation motor and a method for driving the brush-fed hybrid excitation motor that can easily control characteristics.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the brush-fed hybrid excitation motor 1 includes a stator 2 and a rotor 3.

  As shown in FIGS. 1 to 3, the stator 2 includes a substantially disc-shaped yoke 11, a plurality (two in this embodiment) of permanent magnets 12 fixed to the yoke 11, and a plurality (this embodiment). 2) iron cores 13, bearings 14, and brush holders 15, and a pair of brushes 16 held by the brush holders 15.

  On the outer edge of the yoke 11, a cylindrical cylindrical portion 11a protruding in the axial direction is formed. Further, an inner protruding portion 11b is formed at the inner center of the yoke 11 so as to protrude in a direction opposite to the protruding direction of the cylindrical portion 11a with two steps. Further, a through hole 11c penetrating in the axial direction is formed at the axial center of the inner protruding portion 11b.

  The permanent magnets 12 and the iron cores 13 are alternately arranged and fixed in the circumferential direction on the plane of the yoke 11 so as to protrude from the plane in the axial direction (the direction in which the cylindrical portion 11a protrudes). As shown in FIGS. 2 and 3, the permanent magnet 12 and the iron core 13 are formed in a fan shape, and are arranged at equiangular intervals with a slight gap in the circumferential direction. The two permanent magnets 12 have one magnetic pole (N pole in the present embodiment) aligned with one in the axial direction (the direction in which the cylindrical portion 11a protrudes in the present embodiment). That is, the magnetization directions of the two permanent magnets 12 are aligned in the same axial direction.

  A bearing 14 is fixed on the center side of the inner protruding portion 11 b of the yoke 11. The bearing 14 of the present embodiment is a ball bearing and is made of a magnetic material. An annular brush holder 15 is fixed to the outer side of the inner protrusion 11b of the yoke 11 (the outer side in the radial direction of the bearing 14). The brush holder 15 holds a pair of brushes 16 at equiangular (180 °) intervals. The brush 16 is held movably along the axial direction, and is urged in the axial direction (direction in which the cylindrical portion 11a protrudes) by an urging means such as a spring (not shown). The brush 16 is electrically connected to an external control device (not shown).

  Further, in the yoke 11, an annular shape for generating and controlling a magnetic flux (described later) wound around the radial direction of the permanent magnet 12 and the iron core 13 in the circumferential direction and passing through the iron core 13. An outer excitation coil 21 and an inner excitation coil 22 are fixed as the excitation coils. The outer excitation coil 21 is disposed between the outer peripheral surfaces (outer circular arc surfaces) of the permanent magnet 12 and the iron core 13 and the inner peripheral surface of the cylindrical portion 11a of the yoke 11 so as to come into contact with the respective surfaces. Further, the inner excitation coil 22 is disposed radially inward of the permanent magnet 12 and the iron core 13 and further radially inward of the brush 16 (in contact with the brush holder 15). An external control device (not shown) is electrically connected to the outer excitation coil 21 and the inner excitation coil 22.

As shown in FIGS. 1 and 3, the rotor 3 includes a rotating shaft 31, a substantially disc-shaped rotor core 32, an armature coil 33, and a commutator 34.
One end side (the upper end side in FIG. 1) of the rotating shaft 31 is rotatably supported by the bearing 14. A fixing hole 32a is formed at the center of the rotor core 32, and the rotating shaft 31 is fixed in the fixing hole 32a.

  In the rotor core 32, a plurality of armature core portions 32b projecting in the axial direction (the facing direction) are provided at equal angular intervals in the circumferential direction at radial positions facing the permanent magnet 12 and the iron core 13 in the axial direction. (16 in this embodiment) are formed. As shown in FIG. 3, the armature core portion 32 b is formed in a fan shape when viewed from the axial direction. An armature coil 33 is wound around each armature core portion 32b. The armature coil 33 is wound so as to go around the fan shape when viewed from the axial direction.

  Further, in the rotor core 32, the brush 16 is pressed and contacted at a radial position inside the armature core portion 32b and facing the brush 16 in the axial direction, through the brush 16 and itself. A commutator 34 for supplying an armature current to the armature coil 33 is fixed. 1 and 3, the commutator 34 includes an annular insulating resin 34a (see FIG. 1) fixed on the rotor core 32, and a plurality of commutators arranged in the circumferential direction on the insulating resin 34a. Segment 34b. The brush 16 can be slidably contacted on the commutator segment 34b along the circumferential direction.

  Further, the rotor core 32 has the same radial direction as the outer peripheral position of the cylindrical portion 11a so that the outer edge thereof (the portion radially outside the armature core portion 32b) faces the cylindrical portion 11a of the yoke 11 in the axial direction. To the position.

  Here, in the brush-fed hybrid excitation motor 1 configured as described above, an operation when a direct current is supplied to the outer excitation coil 21 and the inner excitation coil 22 will be described.

  First, when a direct current is not supplied to the outer exciting coil 21 and the inner exciting coil 22 (this is a normal case), the magnetic flux φ1 passing through the iron core 13 is based only on the magnetic force of the permanent magnet 12, FIG. As shown in FIG. 4, the armature core portion 32 b goes to the yoke 11 via the iron core 13. FIG. 4 is an explanatory diagram in which the hatching of the cross-sectional view shown in FIG. 1 is removed in order to make it easy to visually understand the magnetic flux φ1 schematically indicated by an arrow.

  Next, as shown in FIG. 5, when a DC current is supplied to the outer excitation coil 21 in the counterclockwise direction and a DC current is supplied to the inner excitation coil 22 in the clockwise direction in plan view, The magnetic flux φ2 to be added is newly added based on the outer excitation coil 21 and the inner excitation coil 22, and is magnetized. FIG. 5 is an explanatory diagram in which the hatching of the cross-sectional view shown in FIG. 1 is removed in order to make it easy to visually understand the magnetic flux φ2 schematically indicated by an arrow.

  On the other hand, as shown in FIG. 6, when a DC current is supplied to the outer excitation coil 21 in the clockwise direction and a DC current is supplied to the inner excitation coil 22 in the counterclockwise direction in plan view, it passes through the iron core 13. The magnetic flux φ3 to be added is newly added based on the outer excitation coil 21 and the inner excitation coil 22, and is demagnetized. FIG. 6 is an explanatory diagram from which the hatching of the cross-sectional view shown in FIG. 1 is removed in order to make the magnetic flux φ3 schematically indicated by an arrow easy to understand visually.

FIG. 7 shows the relationship between the current value Ia of the direct current supplied to the outer exciting coil 21 and the inner exciting coil 22 and the increase / decrease rate of the interlinkage magnetic flux interlinked with the armature coil 33.
In FIG. 7, the center is the normal case shown in FIG.

  In FIG. 7, the right half, that is, the positive side (0 to 500 [AT]) of the current value Ia applies a direct current in a counterclockwise direction to the outer exciting coil 21 in a plan view as shown in FIG. In this case, a direct current is supplied to the inner exciting coil 22 in the clockwise direction (magnetization is increased), and the increase / decrease rate of the flux linkage increases as the current value Ia increases on the plus side.

  Further, in FIG. 8, the left half, that is, the negative side (0 to −500 [AT]) of the current value Ia applies a DC current to the outer exciting coil 21 in the clockwise direction in a plan view as shown in FIG. In this case, the direct current is supplied to the inner exciting coil 22 in the counterclockwise direction (demagnetized), and the increase / decrease rate of the flux linkage decreases as the current value Ia increases on the negative side.

Next, characteristic effects of the above embodiment will be described below.
(1) When a direct current is supplied to the outer exciting coil 21 and the inner exciting coil 22, the magnetic flux passing through the iron core 13 provided between the permanent magnets 12 of the stator 2 is controlled. Specifically, depending on the direction (and value (absolute value of the current value Ia)) of the direct current supplied to the outer exciting coil 21 and the inner exciting coil 22, the magnetic flux passing through the iron core 13 is increased (see FIG. 5) or The magnetic flux is demagnetized (see FIG. 6), and as a result, the flux linkage linked to the armature coil 33 is increased or decreased (see FIG. 7). Therefore, in the axial gap type brush-fed motor (the brush-fed hybrid excitation motor 1 of the present embodiment) in which the permanent magnet 12 and the iron core 13 and the armature core part 32b face each other in the axial direction, the characteristics ( Torque and rotational speed characteristics) can be controlled. As described above, when the magnetization is increased, the characteristics are high torque and low rotation speed, and when the magnetization is demagnetized, the characteristics are low torque and high rotation speed.

  (2) Since the exciting coils are arranged on both the radially outer side and the inner side of the permanent magnet 12 and the iron core 13 (the outer exciting coil 21 and the inner exciting coil 22 are provided), compared with the case where they are arranged on either one. The increase / decrease width of the interlinkage magnetic flux can be increased. Therefore, the characteristics (torque and rotational speed characteristics) can be greatly controlled.

  (3) The bearing 14 is made of a magnetic material. In this case, since the bearings 14 constituting a part of the magnetic circuit (magnetic path) when a direct current is supplied to the outer exciting coil 21 and the inner exciting coil 22 are made of a magnetic material, the interlinkage magnetic flux is efficiently used. Can increase or decrease well.

  (4) Since the commutator 34 is disposed on the radially inner side of the armature core portion 32b and is in press contact with the brush 16 in the axial direction, the brush-fed hybrid excitation motor 1 is moved in the radial direction and the axial direction. It can be downsized.

The above embodiment may be modified as follows.
In the above embodiment, the excitation coils are arranged on both the radially outer side and the inner side of the permanent magnet 12 and the iron core 13 (the outer excitation coil 21 and the inner excitation coil 22 are provided). What is necessary is just to arrange | position to at least one.

  For example, as shown in FIGS. 8 and 9, the exciting coils are arranged only on the radially outer side of the permanent magnet 12 and the iron core 13 (only the outer exciting coil 21 is provided, and the inner exciting coil 22 of the above embodiment is deleted). ) Configuration is also possible. On the other hand, as shown in FIGS. 10 and 11, the exciting coil is disposed only in the radial direction of the permanent magnet 12 and the iron core 13 (only the inner exciting coil 22 is provided, and the outer exciting coil 21 of the above embodiment is provided). It is good also as a structure which deleted ().

  Even if it does in this way, although the magnetic flux which passes along the iron core 13 can be controlled similarly to the said embodiment, the controllable width | variety becomes small compared with the said embodiment. FIG. 12 shows the current value Ia of the direct current supplied to the outer exciting coil 21 when only the outer exciting coil 21 is used (see FIGS. 8 and 9), and the increase / decrease rate of the interlinkage magnetic flux interlinked with the armature coil 33. The relationship is shown. FIG. 13 shows the increase / decrease in the interlinkage magnetic flux interlinked with the armature coil 33 and the current value Ia of the direct current supplied to the inner excitation coil 22 when only the inner excitation coil 22 is used (see FIGS. 10 and 11). The relationship with the rate is shown. As can be seen from FIGS. 12 and 13, the interlinkage magnetic flux is greater than the case of only the outer excitation coil 21 (see FIGS. 8 and 9) and the case of only the inner excitation coil 22 (see FIGS. 10 and 11). It can be increased or decreased efficiently. That is, when the exciting coil is arranged only on the outer side in the radial direction of the permanent magnet 12 and the iron core 13 (see FIGS. 8 and 9), the increase / decrease width of the interlinkage magnetic flux (see FIG. 12) is arranged only on the inner side in the radial direction. In this case (see FIG. 10 and FIG. 11), the linkage flux is significantly larger than the increase / decrease width of the linkage flux (see FIG. 13), so that the linkage flux can be efficiently increased / decreased.

  In the above embodiment, the commutator 34 is disposed on the radially inner side of the armature core portion 32b, and is in press contact with the brush 16 in the axial direction. It is good also as what is press-contacted with the brush 16 by a structure.

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(B) The brush-fed hybrid excitation motor according to claim 1, wherein the excitation coil is disposed only on a radially outer side of the permanent magnet and the iron core.

  According to this configuration, since the exciting coil is disposed only on the radially outer side of the permanent magnet and the iron core, for example, the interlinkage magnetic flux can be increased / decreased more efficiently than when disposed only on the inner side ( (See FIG. 12 and FIG. 13). That is, the increase / decrease width of the interlinkage magnetic flux when the exciting coil is arranged only on the radially outer side of the permanent magnet and the iron core (see FIG. 12) is the increase / decrease width of the interlinkage magnetic flux when arranged only on the radially inner side. Since it is much larger (see FIG. 13), the flux linkage can be increased or decreased efficiently (effectively).

It is sectional drawing of the brush electric power feeding type hybrid excitation motor in this Embodiment, Comprising: Sectional drawing corresponding to the BB line of FIG. It is sectional drawing of the brush electric power feeding type hybrid excitation motor in this Embodiment, Comprising: Sectional drawing corresponding to the AA line of FIG. The partial cross-section disassembled perspective view of the brush electric power feeding type hybrid excitation motor in this Embodiment. The model explanatory drawing for demonstrating the flow of the magnetic flux in this Embodiment. The model explanatory drawing for demonstrating the flow of the magnetic flux in this Embodiment. The model explanatory drawing for demonstrating the flow of the magnetic flux in this Embodiment. The current value of the exciting coil in this Embodiment-the increase / decrease rate characteristic figure of a linkage flux. It is sectional drawing of the brush electric power feeding type hybrid excitation motor in another example, Comprising: Sectional drawing corresponding to the BB line of FIG. It is sectional drawing of the brush electric power feeding type hybrid excitation motor in another example, Comprising: Sectional drawing corresponding to the AA line of FIG. It is sectional drawing of the brush electric power feeding type hybrid excitation motor in another example, Comprising: Sectional drawing corresponding to the BB line of FIG. It is sectional drawing of the brush electric power feeding type hybrid excitation motor in another example, Comprising: Sectional drawing corresponding to the AA line of FIG. The current value of the exciting coil in another example-the increase / decrease rate characteristic diagram of a linkage flux. The current value of the exciting coil in another example-the increase / decrease rate characteristic diagram of a linkage flux.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Stator, 3 ... Rotor, 11 ... Yoke, 12 ... Permanent magnet, 13 ... Iron core, 14 ... Bearing, 16 ... Brush, 21 ... Outer excitation coil (excitation coil), 22 ... Inner excitation coil (excitation coil), 31 Rotating shaft, 32b Armature core, 33 Armature coil, 34 Commutator.

Claims (6)

A substantially disc-shaped flat portion of the yoke tubular portion protruding in the axial direction is formed so as to protrude axially outer edge, and the permanent magnet and a plurality of cores of several alternately arranged in the circumferential direction, A stator in which each permanent magnet is magnetized in the axial direction and aligned so that one of the axial directions becomes the same magnetic pole ;
The permanent with magnets and a radially outer side of said core being located radially inwardly of the tubular portion wound in the circumferential direction, the outer annular to control generating a magnetic flux passing through the core An exciting coil;
A plurality of armature core portions wound around an armature coil disposed so as to face the permanent magnet and the iron core in the axial direction and a brush provided in the stator are pressed and contacted, and the armature coil a rotor having a commutator for supplying armature current,
During normal operation in which no direct current is supplied to the outer excitation coil, the magnetic flux passing through the iron core is directed to one side in the axial direction based on the magnetic force of the permanent magnet,
When a direct current is supplied to the outer excitation coil in one direction, based on the direct current, the iron core, the flat portion of the yoke, the cylindrical portion of the yoke, the armature core portion of the rotor, the iron core A magnetic flux loop through which magnetic flux passes is formed,
When a direct current is supplied to the outer excitation coil in the other direction, based on the direct current, the iron core, the armature core portion of the rotor, the cylindrical portion of the yoke, the plane portion of the yoke, the iron core A magnetic flux loop through which magnetic flux passes is formed,
In the magnetic flux passing through the iron core, the direction of the magnetic flux formed when a direct current is supplied to the outer excitation coil and the direction of the magnetic flux formed based on the magnetic force of the permanent magnet are the same direction The magnetic flux passing through the iron core is increased, resulting in high torque and low rotational speed.
In the magnetic flux passing through the iron core, the direction of the magnetic flux formed when a direct current is supplied to the outer excitation coil and the direction of the magnetic flux formed based on the magnetic force of the permanent magnet are opposite to each other. The magnetic flux passing through the iron core is demagnetized, resulting in low torque and high rotational speed.
A brush-fed hybrid excitation motor characterized in that characteristics of torque and rotational speed are controlled by changing the direction of a direct current supplied to the outer excitation coil . The brush-fed hybrid excitation motor according to claim 1,
The inner magnet coil further includes an annular inner excitation coil that is arranged on the inner side in the radial direction of the permanent magnet and the iron core and wound in the circumferential direction, and generates and controls a magnetic flux that passes through the iron core,
The rotor further includes a rotating shaft that rotates integrally with the armature core portion and the commutator;
During normal operation in which no direct current is supplied to the outer excitation coil and the inner excitation coil, the magnetic flux passing through the iron core is directed to one side in the axial direction based on the magnetic force of the permanent magnet,
When a direct current is supplied to the inner excitation coil in one direction, based on the direct current, the iron core, the flat portion of the yoke, the rotating shaft, the armature core of the rotor, the iron core, etc. A magnetic flux loop through which the magnetic flux passes is formed,
When a direct current is supplied to the inner excitation coil in the other direction, based on the direct current, the iron core, the armature core portion of the rotor, the rotating shaft, the plane portion of the yoke, the iron core, etc. A magnetic flux loop through which the magnetic flux passes is formed,
In the magnetic flux passing through the iron core, the direction of the magnetic flux formed when supplying DC currents in opposite directions in the circumferential direction to the outer excitation coil and the inner excitation coil is the same direction,
In the magnetic flux passing through the iron core, the direction of the magnetic flux formed when DC currents in opposite directions are supplied to the outer exciting coil and the inner exciting coil, and the magnetic flux formed based on the magnetic force of the permanent magnet. When the direction is the same direction, the magnetic flux passing through the iron core is increased, resulting in high torque and low rotational speed,
In the magnetic flux passing through the iron core, the direction of the magnetic flux formed when DC currents in opposite directions are supplied to the outer exciting coil and the inner exciting coil, and the magnetic flux formed based on the magnetic force of the permanent magnet. When the direction is the opposite direction, the magnetic flux passing through the iron core is demagnetized, resulting in low torque and high rotational speed.
A brush-fed hybrid excitation motor, wherein characteristics of torque and rotational speed are controlled by changing the direction of a direct current supplied to the outer excitation coil and the inner excitation coil. A plurality of permanent magnets and a plurality of iron cores are alternately arranged in the circumferential direction so as to protrude in the axial direction from the substantially disk-shaped flat portion of the yoke, and each permanent magnet is magnetized in the axial direction, and one of the axial directions is A stator aligned to have the same magnetic pole,
An annular inner exciting coil that is arranged on the radially inner side of the permanent magnet and the iron core and wound in the circumferential direction, and generates and controls a magnetic flux that passes through the iron core;
A plurality of armature core portions wound around an armature coil disposed so as to face the permanent magnet and the iron core in the axial direction and a brush provided in the stator are pressed and contacted, and the armature coil A rotor having a commutator for supplying an armature current to the armature and a rotating shaft that rotates integrally with the armature core part and the commutator;
During normal operation in which no direct current is supplied to the inner excitation coil, the magnetic flux passing through the iron core is directed to one side in the axial direction based on the magnetic force of the permanent magnet,
When a direct current is supplied to the inner excitation coil in one direction, based on the direct current, the iron core, the flat portion of the yoke, the rotating shaft, the armature core of the rotor, the iron core, etc. A magnetic flux loop through which the magnetic flux passes is formed,
When a direct current is supplied to the inner excitation coil in the other direction, based on the direct current, the iron core, the armature core portion of the rotor, the rotating shaft, the plane portion of the yoke, the iron core, etc. A magnetic flux loop through which the magnetic flux passes is formed,
In the magnetic flux passing through the iron core, the direction of the magnetic flux formed when a direct current is supplied to the inner excitation coil and the direction of the magnetic flux formed based on the magnetic force of the permanent magnet are the same direction The magnetic flux passing through the iron core is increased, resulting in high torque and low rotational speed.
In the magnetic flux passing through the iron core, the direction of the magnetic flux formed when a direct current is supplied to the inner excitation coil and the direction of the magnetic flux formed based on the magnetic force of the permanent magnet are opposite to each other. The magnetic flux passing through the iron core is demagnetized, resulting in low torque and high rotational speed.
A brush-fed hybrid excitation motor, wherein characteristics of torque and rotational speed are controlled by changing a direction of a direct current supplied to the inner excitation coil. The brush-fed hybrid excitation motor according to claim 2 or 3 ,
The axial center of the pre-Symbol yoke, a bearing for rotatably supporting the rotary shaft is provided,
The brush-fed hybrid excitation motor, wherein the bearing is made of a magnetic material. The brush-fed hybrid excitation motor according to any one of claims 1 to 4 ,
The brush commutation type hybrid excitation motor, wherein the commutator is disposed radially inside the armature core portion and is pressed against the brush in the axial direction. A method for driving a brush-fed hybrid excitation motor according to any one of claims 1 to 5 ,
A method of driving a brush-fed hybrid excitation motor, wherein the characteristics of torque and rotational speed are controlled by controlling the magnetic flux passing through the iron core by changing the direction and value of a direct current supplied to the excitation coil. .

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