WO2007018261A1 - Moteur à courant continu et moteur vibrant à courant continu - Google Patents

Moteur à courant continu et moteur vibrant à courant continu Download PDF

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Publication number
WO2007018261A1
WO2007018261A1 PCT/JP2006/315806 JP2006315806W WO2007018261A1 WO 2007018261 A1 WO2007018261 A1 WO 2007018261A1 JP 2006315806 W JP2006315806 W JP 2006315806W WO 2007018261 A1 WO2007018261 A1 WO 2007018261A1
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WO
WIPO (PCT)
Prior art keywords
rotor
magnetic pole
magnetic
pole
poles
Prior art date
Application number
PCT/JP2006/315806
Other languages
English (en)
Japanese (ja)
Inventor
Tomoyuki Kugou
Tomohide Aoyagi
Original Assignee
Namiki Seimitsu Houseki Kabushikikaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Namiki Seimitsu Houseki Kabushikikaisha filed Critical Namiki Seimitsu Houseki Kabushikikaisha
Publication of WO2007018261A1 publication Critical patent/WO2007018261A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/061—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses
    • H02K7/063—Means for converting reciprocating motion into rotary motion or vice versa using rotary unbalanced masses integrally combined with motor parts, e.g. motors with eccentric rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
    • H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
    • H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures

Definitions

  • the present invention relates to a direct current motor suitable as a drive source for various small devices and a vibration motor using the same, and more particularly to a motor driven by a completely new principle that can be applied as a brushless motor. is there.
  • a vibration type micro motor (vibration motor) has been used as a silent ringing vibration generator built in a mobile phone.
  • vibration motors are also used in various state-of-the-art devices such as medical devices (for example, the lens drive mechanism of the endoscope tip and the drive mechanism of the intrauterine diagnostic treatment device). It is used as a driving source, and its field of use is expected to expand further in the future.
  • brush motors have been mainly used as vibration motors and general-purpose micromotors.
  • a motor with a brush has an advantage that it can be manufactured at a low cost, it has a drawback in that it has a short life because the sliding contact of the brush (mechanical wear, electric wear) is severe.
  • a flat vibration motor is known that is aimed at miniaturization of the motor (for example, Patent Document 1).
  • this flat vibration motor has a high peripheral speed of the sliding contact of the brush.
  • the sliding contact is particularly worn.
  • a motor without a sliding contact such as a brushless motor or a stepping motor has a long life force, particularly in terms of manufacturing cost.
  • the conventional brushless motor requires a complicated driver circuit for controlling the magnetic pole and the rotation mode, and therefore the manufacturing cost is very high compared with the motor with the brush.
  • stepping motors have a complicated stator structure, the manufacturing cost is very high and it is difficult to reduce the size of the stepping motor.
  • Patent Document 1 Japanese Patent Laid-Open No. 6-205565
  • Patent Document 2 JP-A-10-174414
  • the brushless motor as shown in Patent Document 2 requires a special and complex structure of the rotor, and thus has a drawback that it is expensive to manufacture and is difficult to downsize.
  • the object of the present invention is to solve the above-described problems of the prior art, and does not require a complicated control circuit, etc., and can be manufactured at a low cost with a simple structure, and has a long life and a small size. It is to provide a DC motor and a DC vibration motor that can be made thinner and thinner.
  • the inventors of the present invention have made extensive studies on the structure of a brushless motor that can smoothly drive a rotor stator with a complicated structure such as that of Patent Document 2 with a simple control circuit.
  • a plurality of electromagnets (such as armature coils) arranged at intervals around the magnet rotor to form the magnetic poles on the stator side have a magnetic field strength by adjusting the coil wire diameter and the number of
  • the idea was to give a magnet rotor a torque in one direction by creating a magnetic field gradient between adjacent electromagnets.
  • a plurality of magnetic poles (magnetic poles composed of electromagnets) arranged around the magnet rotor at intervals are divided into two magnetic pole groups, and each magnetic pole group has The magnetic field strength of a plurality of magnetic poles is designed to increase sequentially for each magnetic pole in the rotor rotation direction so that the gradient of the magnetic field is generated, and then the two magnetic pole groups are excited to different polarities and their polarities are changed. It was found that the magnet rotor rotates very smoothly in one direction by reversing it in a timely manner.
  • a motor having such a drive principle has a permanent magnet provided in a stator that includes only a rotor (a brushless motor) of a type in which a rotor includes a permanent magnet and a stator includes a plurality of magnetic poles composed of electromagnets.
  • a motor brush motor
  • a rotor having a plurality of magnetic poles composed of electromagnets.
  • the present invention has been made on the basis of the above knowledge, and has a complicated control circuit as in the prior art.
  • a completely new type of DC motor that is smoothly driven by extremely simple control means that repeatedly reverses the polarity of the two magnetic pole groups composed of electromagnets without using a rotor or stator with a complicated structure. It is.
  • the DC motor and DC vibration motor of the present invention have the following characteristics.
  • One of a rotor and a stator is provided with a permanent magnet, and the other is a magnetic pole constituted by an electromagnet, and a plurality of magnetic poles for applying torque to the rotor by interaction with the permanent magnet.
  • a magnetic pole constituted by an electromagnet, and a plurality of magnetic poles for applying torque to the rotor by interaction with the permanent magnet.
  • the plurality of magnetic poles are adjacent to each other in the circumferential direction around the rotation axis of the rotor and have a plurality of magnetic poles that are excited with the same polarity.
  • adjacent magnetic pole groups G in the circumferential direction around the rotor rotation axis are excited with different polarities. Configured,
  • the magnetic field strength of the plurality of magnetic poles included in each of the magnetic pole groups G is sequentially increased for each magnetic pole in the direction of rotor rotation or anti-rotor rotation in accordance with the following conditions (a) and (b): DC motor characterized by
  • a DC motor according to any one of [1] to [3] above, wherein the electromagnet constituting the magnetic pole is an armature coil.
  • a fixed shaft disposed along the axis of the flat case constituting the stator; a flat rotor rotatably supported on the fixed shaft in the case;
  • a DC vibration motor comprising: a plurality of armature coils fixed to the inside of the case in a state of facing one surface of the rotor.
  • a fixed shaft disposed along the axis of the flat case constituting the stator; a flat rotor rotatably supported on the fixed shaft in the case;
  • a DC vibration motor comprising: a plurality of armature coils fixed to the inside of the case in a state of facing the outer peripheral surface of the rotor.
  • the rotor is configured in a disk shape, and has a permanent magnet in one semicircular region of the disk, and an eccentric weight in the other semicircular region.
  • a direct-current vibration motor characterized by comprising:
  • the direct current motor and the direct current vibration motor of the present invention adjust the polarities of the two magnetic pole groups G in a timely manner. Since it is driven simply by turning it back and forth, no complicated control circuit is required, and the motor structure itself has a plurality of magnetic poles whose magnetic field strengths are adjusted by changing the coil wire diameter and number. Since it only needs to be arranged, it can be manufactured at a very low cost.
  • a brushless motor can be obtained by adopting a structure in which the rotor is provided with a permanent magnet and the stator is provided with a plurality of magnetic poles constituted by electromagnets. Therefore, it is easy to reduce the size and reduce the thickness, and it is easy to realize a thickness of 3mm or less, which is difficult with conventional brushless motors and brushless vibration motors. it can.
  • a DC motor includes a permanent magnet on one of a rotor and a stator, and a magnetic pole composed of an electromagnet on the other, and applies torque to the rotor by interaction with the permanent magnet.
  • a plurality of magnetic poles are provided at intervals in the circumferential direction around the rotor rotation axis.
  • the plurality of magnetic poles are 2n (where n is an integer of 1 or more) magnetic pole group G force having a plurality of magnetic poles adjacent to each other in the circumferential direction around the rotor rotation axis and excited to the same polarity.
  • the magnetic pole groups G adjacent to each other in the circumferential direction around the rotor rotation axis are excited so that the magnetic poles have different polarities. Configured.
  • the magnetic field strength of the plurality of magnetic poles included in each of the magnetic pole groups G is sequentially increased for each magnetic pole according to the following conditions (a) and (b). Configured.
  • the DC motor of the present invention as described above is (i) a type in which the rotor includes a permanent magnet and the stator includes a plurality of magnetic poles configured by an electromagnet, the GO stator includes a permanent magnet, and the rotor includes an electromagnet.
  • the type (i) is a brushless motor
  • the GO type is a brushed motor.
  • Both types (i) and (ii) above are the inner rotor type and outer rotor type. It can also be used as a misaligned motor
  • an electromagnet having a force claw pole which is a common armature coil, may be used.
  • FIG. 1 schematically shows (in principle) one embodiment of an inner rotor type brushless motor of the above-mentioned type G) among the DC motors of the present invention, wherein 1 includes a permanent magnet.
  • the rotor 3 is a stator (motor cover).
  • the stator 3 is a magnetic pole constituted by an armature coil (electromagnet), and applies torque to the rotor 1 by interaction with the permanent magnet. Spacing multiple magnetic poles 2 (2a to 2a, 2b to 2b) in the circumferential direction around the rotor rotation axis
  • the rotor 1 is a so-called magnet rotor.
  • the rotor 1 has a disk shape and a substantially entire force composed of a permanent magnet.
  • the rotor 1 may have any shape other than the above.
  • two substantially semicircular permanent magnets 5 are connected to form a disk-shaped rotor body, and the permanent magnets 5 have the same two magnetic poles 4A (S poles) as the number of magnetic pole groups G described later. 4B (N pole) is configured.
  • At least one magnetic pole is constituted by the permanent magnet 5, and it is sufficient that torque is applied to the rotor 1 by interaction with the magnetic pole 2 constituted by the electromagnet. Therefore, the magnetic pole 4A (S Poles) and 4B (N poles) only one force may be provided.
  • a plurality of magnetic poles 2 constituted by the armature coils are arranged on the stator 3 side at intervals in the circumferential direction so as to surround the rotor 1.
  • the plurality of magnetic poles 2 include a magnetic pole group G having three magnetic poles 2a to 2a adjacent to each other in the circumferential direction, and a magnet having three magnetic poles 2b to 2b.
  • Magnetic poles ie, magnetic pole group G: magnetic poles 2a-2a, magnetic pole group G: magnetic pole 2b
  • the adjacent magnetic pole groups are configured so that the magnetic poles are excited to have different polarities. That is, when the magnetic poles 2a to 2a of the magnetic pole group G are excited to the N pole, the magnetic pole of the magnetic pole G
  • the magnetic poles 2b to 2b of the magnetic pole group G are excited to the N pole.
  • the magnetic field strength (magnetic flux) of the armature coil (electromagnet) constituting the magnetic pole 2 can be arbitrarily set by adjusting one or more of the coil wire diameter, the number of coils, the presence or absence of the yoke, and the size. Can be set.
  • each magnetic pole group G may be composed of two or more magnetic poles 2 (electromagnets), and the number thereof is arbitrary.
  • Fig. 2 shows that the magnetic pole groups G and G each have two magnetic poles (magnetic poles 2a and 2a, magnetic poles 2b and 2b).
  • each magnetic pole group 1 2 1 2 1 2 schematically shows an embodiment of a DC motor (inner rotor type motor of the same type as G in FIG. 1). Also in this embodiment, as in FIG. 1, each magnetic pole group
  • the magnetic pole groups G and G are configured so that the magnetic poles are excited to different polarities.
  • the magnetic poles 2b and 2b of the magnetic pole group G are excited to the N pole. Also, in each magnetic pole group G, G, G
  • the magnetic field strength of the magnetic poles of 2 1 2 1 2 is set to increase sequentially for each magnetic pole in the rotor rotation direction indicated by the arrow in the figure (counterclockwise direction in the figure).
  • the strength is magnetic pole 2a ⁇ magnetic pole 2a, magnetic pole 2b, and magnetic pole 2b.
  • the number of magnetic pole groups G can be 2n (where n is an integer of 1 or more).
  • Fig. 3 shows a DC motor with four magnetic pole groups G to G (same as Fig. 1).
  • Each of the magnetic pole groups G to G includes three magnetic poles 2a to 2a, 2b to 2b, 2c to 2c, and 2d to 2d.
  • 2 1 3 3 1 3 4 are configured so that the magnetic poles 2d to 2d,;) are excited to the same polarity, and are adjacent in the circumferential direction.
  • the magnetic pole groups G are configured such that the magnetic poles are excited to different polarities. In other words, the magnetic pole groups G and G and the magnetic pole groups G and G are excited to different polarities, and the magnetic pole groups G and G 2
  • magnetic pole groups G and G magnetic poles 2b to 2b and 2d to 2d are excited to N pole
  • the magnetic field strength of ⁇ 2d is also in the rotor rotation direction (counterclockwise direction in the figure) indicated by the arrow in the figure.
  • the magnetic field strength is as follows: magnetic pole 2a ⁇ magnetic pole 2a, magnetic pole 2a, magnetic pole 2b, magnetic pole 2b, magnetic pole 2b, magnetic pole 2c, magnetic pole 2c, magnetic pole 2c, magnetic pole 2c, magnetic pole 2c, magnetic pole 2c, magnetic pole 2c,
  • the rotor 1 in the embodiment of FIG. 3 is also a so-called magnet rotor, and a disk-shaped rotor main body is configured by connecting four substantially quarter-circular permanent magnets 5, and the number of magnetic pole groups G
  • the same four magnetic poles 4A (S pole), 4B (N pole), 4C (S pole), and 4D (N pole) are configured.
  • the number of magnetic pole groups G can be 2n (where n is an integer equal to or greater than 1).
  • the force that can be an arbitrary number of two or more. From the standpoints of simplification of the motor structure, ease of manufacturing, manufacturing cost, smooth driveability of the motor, etc.
  • magnetic pole groups G and G have 2 to 4 and the same number of magnetic poles 2 (electromagnets).
  • each magnetic pole group G is preferably provided with the same number of magnetic poles 2 as described above, and the plurality of magnetic poles 2 are arranged at equal intervals.
  • Fig. 4 (A) to (F) shows the types of Fig. 1 and Fig. 2 with two magnetic pole groups G and G.
  • the number of magnetic poles 4 with respect to the number of magnetic pole groups G is also arbitrary. Basically, at least one magnetic pole 4 (N pole or S pole) is sufficient. Therefore, the same number of magnetic pole groups G and magnetic poles 4 is preferable. That is, it has two magnetic pole groups G and G.
  • N pole and S pole are provided with two magnetic poles 4 (N pole and S pole) as shown in Fig. 1 and Fig. 2, and when there are four magnetic pole groups G to G, as shown in Fig. 3. Alternating N and S poles in the circumferential direction
  • the plurality of magnetic poles 2 are arranged so as to surround the rotor itself.
  • the plurality of magnetic poles 2 form a magnetic pole that gives torque to the rotor 1.
  • a plurality of magnetic poles may be arranged at intervals in the circumferential direction around the rotor rotation axis as long as they are arranged as possible. Therefore, a plurality of magnetic poles 2 may be arranged so as to surround the rotation axis of the rotor 1.
  • the plurality of magnetic poles 2 (armature coils) face one face of the rotor 1 (facing). Will be placed in a state.
  • FIG. 5 schematically shows (in principle) one embodiment of the outer rotor type brushless motor of the type (i) described above in the DC motor of the present invention.
  • a rotor with a magnet (motor cover), 3x is a stator arranged inside this rotor lx.
  • the stator 3x is a magnetic pole composed of an armature coil (electromagnet), and a plurality of magnetic poles 2 (2e, 2f) that apply torque to the rotor by interaction with the permanent magnet are arranged around the rotation axis of the rotor. Are provided at intervals in the circumferential direction.
  • a permanent magnet 5 having a predetermined length in the circumferential direction is fixed inside the rotor lx.
  • Two magnetic poles 4 (N poles in this embodiment) are formed.
  • the magnetic poles 2 (2e, 2f) constituted by the armature coils are provided at intervals in the circumferential direction of the stator (the circumferential direction around the rotor rotation axis).
  • the plurality of magnetic poles 2 are, as in the embodiment of FIG. 1, a magnetic pole group G having three magnetic poles 2e to 2e adjacent in the circumferential direction,
  • the magnetic pole group G consists of three magnetic poles 2f to 2f. Each of these magnetic pole groups G,
  • the magnetic pole group G is configured so that the magnetic poles 2f ⁇ 2f) are excited to the same polarity
  • the coil connection of the armature coil is selected.
  • the magnetic force is set so as to increase sequentially for each magnetic pole in the rotor rotation direction indicated by the arrow (counterclockwise direction in the figure). That is, the magnetic field strength of the magnetic pole groups G and G is
  • the stator includes a permanent magnet and the rotor includes a plurality of magnetic poles composed of electromagnets.
  • FIG. 6 schematically shows an embodiment of the above GO type inner rotor brush motor.
  • 3y is a stator (motor cover) having a permanent magnet, and ly is inside this stator 3y. It is a rotor arranged.
  • the rotor lx is a magnetic pole composed of an armature coil (electromagnet), and a plurality of magnetic poles 2 (2g, 2h) that apply torque to the rotor by interaction with the permanent magnet are arranged on the rotor rotation axis. It is provided at intervals in the circumferential direction.
  • a permanent magnet 5 having a predetermined length in the circumferential direction is fixed inside the stator 3y.
  • One magnetic pole 4 (N pole in this embodiment) is formed.
  • the magnetic poles 2 (2g, 2h) constituted by the armature coils are provided at intervals in the circumferential direction of the rotor (circumferential direction around the rotor rotation axis).
  • the plurality of magnetic poles 2 include a magnetic pole group G having three magnetic poles 2g to 2g adjacent in the circumferential direction,
  • G are all magnetic poles that make up each (that is, magnetic pole group G
  • magnetic pole group G is configured so that magnetic poles 2h ⁇ 2h) are excited to the same polarity
  • magnetic poles 2g to 2g of magnetic pole group G are configured to be excited by the nature.
  • magnetic poles 2g to 2g of magnetic pole group G are configured to be excited by the nature.
  • the coil connection of the armature coil to be selected is selected.
  • the magnetic field strengths of the plurality of magnetic poles 2g to 2g and 2h to 2h included in each of the magnetic pole groups G and G are identical to each of the magnetic pole groups G and G.
  • the magnetic field strength of magnetic poles is magnetic pole 2g, magnetic pole 2g, magnetic pole 2g, magnetic pole 2g, magnetic pole 2h, magnetic pole 2h, magnetic pole 2h.
  • FIG. 7 schematically shows an embodiment of the outer rotor type brush motor of the type (ii) above, where lz is a rotor (motor cover), and 3z is arranged inside the rotor lz.
  • the rotor lz is a magnetic pole composed of an armature coil (electromagnet), and a plurality of magnetic poles 2 (2i, 3 ⁇ 4) that apply torque to the rotor by interaction with the permanent magnet are arranged around the rotor rotation axis. Are provided at intervals in the circumferential direction.
  • two substantially semicircular permanent magnets 5 are connected to form a disc-shaped stator body, and the permanent magnets 5 constitute two magnetic poles 4A (S pole) and 4B (N pole). ing.
  • the magnetic poles 2 (21, 3 ⁇ 4) formed by the armature coils are provided at intervals in the circumferential direction around the rotor rotation axis. These multiple magnetic poles 2 are the same as in the embodiment of FIG.
  • a magnetic pole group G composed of three magnetic poles 2i to 2i adjacent in the circumferential direction and three magnetic poles 3 ⁇ 4 to
  • 1 1 3 2 is configured so that the magnetic poles 3 ⁇ 4 to 3 ⁇ 4) are excited to the same polarity, and the magnetic pole groups G and G
  • Magnetic pole groups adjacent in the circumferential direction are configured such that the magnetic poles are excited to have different polarities. That is, when the magnetic poles 2i to 2i of the magnetic pole group G are excited to the N pole,
  • the coil connection etc. of the armature coil that constitutes the magnetic pole is selected so that the pole is excited under the above conditions.
  • Magnetic pole 2i Magnetic pole 2i, magnetic pole 2i, magnetic pole, magnetic pole, magnetic pole 2i.
  • the magnetic field strength (magnetic flux) of the electromagnet constituting the magnetic pole 2 can be arbitrarily set by adjusting one or more of the coil wire diameter, the number of coils, the presence / absence or size of the yoke, etc. it can.
  • the number of magnetic pole groups G can be any number of 2n (where n is an integer of 1 or more).
  • Each magnetic pole group G may be composed of two or more magnetic poles 2 (electromagnets), and the number thereof is arbitrary. However, as a particularly rational structure, there are two magnetic pole groups G and G, and these magnets
  • the pole groups G and G preferably have 2 to 4 and the same number of magnetic poles 2 (electromagnets).
  • each magnetic pole group G includes the same number of magnetic poles 2 as described above, and a plurality of magnetic The poles 2 are preferably arranged at equal intervals.
  • the configuration of the permanent magnet 5 and the magnetic pole 4 constituted by the permanent magnet 5 is arbitrary as long as torque can be applied to the rotor 1 by the interaction with the magnetic pole 2 constituted by an electromagnet.
  • the number of magnetic poles 4 with respect to the number of magnetic pole groups G is also arbitrary. Basically, at least one magnetic pole 4 (N pole or S pole) is sufficient. From the surface, the number of magnetic pole groups G and magnetic poles 4 is preferably the same. In other words, when there are two magnetic pole groups G and G
  • the plurality of magnetic poles 2 should be arranged so as to form a magnetic pole that gives torque to the rotor 1.
  • the plurality of magnetic poles 2 should be arranged at intervals in the circumferential direction around the rotor rotation axis. Yes. Therefore, a plurality of magnetic poles 2 may be arranged so as to surround the rotation axis of the rotor 1. In this case, the plurality of magnetic poles 2 are arranged in a state of facing (opposing) one rotation surface of the rotor 1. It will be.
  • the electromagnet constituting the magnetic pole is an armature coil cage, but the electromagnet may be of a claw pole structure.
  • a DC motor provided with such a claw-pole electromagnet is also a brushless motor.
  • FIG. 8 to 11 show an embodiment of a DC motor in which the electromagnet constituting the magnetic pole 2 also has a claw pole structural force.
  • FIG. 8 is an overall perspective view
  • FIG. 9 is a side view
  • FIG. 11 is a perspective view showing the claw pole in a cross-sectional state.
  • the stator 3a includes two blocks 16A and 16B each having a plurality of claw poles 17 (inductors). Of these blocks, the block 16A includes a plurality (three in the present embodiment) of claw poles 17a to 17a (claw poles) arranged adjacent to each other in the circumferential direction in a semicylindrical shape.
  • the coil 18A for exciting these claw poles and the claw poles 17a to 17a and the coil 18A are held at one end thereof (the base end side of the claw pole).
  • the block 16B also includes a plurality of (three in this embodiment) claw poles 17b to 17b (claw poles) arranged adjacent to each other in the circumferential direction in a semicylindrical shape.
  • the blocks 16A and 16B constitute the stator 3a in a state where the claw pole groups are combined in a cylindrical shape.
  • a rotor la having a permanent magnet similar to that shown in FIG. 1 is disposed inside the stator 3a.
  • the claw poles 17a to 17a and claw poles 17b to 17b are magnetic poles as electromagnets.
  • 17a to 17a are magnetic pole group G
  • claw poles 17b to 17b are magnetic pole group G.
  • the cloponores 17a-17a (magnetic poles 2a-2a) and the cloponoles 17b-17b (magnetic
  • the length in the direction increases sequentially for each claw pole, that is, the strength of the magnetic field increases sequentially for each magnetic pole. Therefore, the magnetic field of the magnetic poles in the magnetic pole groups G and G
  • the strength of magnetic poles 2a, 2a, 2a, 2b As in the embodiment of FIG. 1, the strength of magnetic poles 2a, 2a, 2a, 2b
  • Each of the claw poles 17a to 17a and the claw poles 17b to 17b has one coil 18A.
  • Poles ie, poles 2a-2a for pole group G, poles 2b for pole group G
  • ⁇ 2b are excited to the same polarity. Also, depending on the selection of coil connections for coils 18A and 18B, etc.
  • Magnetic poles 2a to 2a When magnetic poles are excited, magnetic poles 2b to 2b of magnetic pole group G are excited to N poles.
  • the rotor la is a so-called magnet rotor, and is disk-shaped and substantially entirely made of a permanent magnet, as in the embodiment of FIG. That is, two substantially semicircular permanent magnets 5 are connected to form a disc-shaped rotor body.
  • the permanent magnets 5 have two magnetic poles 4A (S poles) and 4B (N Poles) are configured.
  • an outer rotor type motor having a rotor having a permanent magnet as shown in FIG. 5 outside the stator 3 having the claw pole 17 may be used.
  • the rotor 1 is [3
  • Each magnetic pole group G has A function that reverses the direction of the current flowing through each magnetic pole group G every time the angle corresponding to is rotated (180 ° in the embodiment of FIGS. 1 and 2 and 90 ° in the embodiment of FIG. 3). It is only necessary to use a switch circuit having As such a control circuit, for example, a circuit provided in a target device such as a mobile phone may be used. In addition to using such a control circuit, for example, each armature coil is provided with two sets of coils that generate different polarities, and the polarity of the magnetic pole 2 is switched by switching these two sets of coils. A method may be adopted.
  • rotor 1 is [number of 360Z magnetic pole groups G].
  • the direction of the current flowing in each magnetic pole group G is reversed every time the angle corresponding to the angle is rotated (180 ° in the embodiment of FIGS. 1 and 2 and 90 ° in the embodiment of FIG. 3).
  • a simple brush and commutator may be used.
  • FIGS. 12 (A) to (E) taking the embodiment shown in FIG. 1 as an example.
  • the magnetic poles 2a to 2a (armature coils) of the magnetic pole group G are on the N pole,
  • Magnetic poles 2b to 2b (armature coils) are excited to the S pole, respectively, and the S of the rotor 1 (permanent magnet)
  • the center of the pole is positioned at the position of the magnetic pole 2a having the strongest magnetic field among the magnetic poles excited to the N pole.
  • the polarity of the magnetic pole groups G and G is switched (reversed), and the magnetic poles 2a to 2a are changed to the S pole.
  • the magnetic field strength of the magnetic poles in each of the magnetic pole groups G 1 and G 2 is such that the magnetic pole 2 magnetic pole 2a magnetic pole 2a, magnetic pole 2b magnetic pole 2b magnetic pole 2b
  • the DC motor of the present invention has the magnetic field strength of the plurality of magnetic poles 2 included in each magnetic pole group G in the rotor rotation direction (or anti-rotor rotation direction) so that a magnetic field gradient is generated.
  • the polarity of the two magnetic pole groups G is changed to S and N every time the rotor 1 rotates by a predetermined angle (180 ° in the case of Fig. 12).
  • the rotor 1 continues to rotate by simply switching (inverting) alternately.
  • the reversal of the polarity of the magnetic pole group G is performed every time the rotor 1 rotates an angle of [the number of 360 Z magnetic pole groups] °.
  • the rotor rotates basically on the same drive principle as described above. That is, in the outer rotor type brushless motor shown in FIG. 5, the polarity of the magnetic pole groups G and G of the stator 3x is changed to the S pole every time the rotor lx rotates 180 °.
  • the outer rotor type brushed motor shown in Fig. 7 changes the polarity of the magnetic pole groups G and G of the rotor lz.
  • the direct current motor with claw pole structure electromagnet shown in Figs.
  • the rotor la has the polarity of the magnetic pole group G, G of the stator 3a composed of claw pole 17
  • the rotor rotates on the same driving principle as shown in Fig. 12 by alternately switching (reversing) between S pole and N pole.
  • the rotor 1 of each embodiment as shown in FIGS. 1 to 3, 5 to 7, and 8 to 11 is provided with an eccentric weight (weight).
  • the rotor 1 whose rotation center itself is eccentric, or the rotor 1 whose eccentric center is eccentric is further provided with an eccentric weight (weight). May be.
  • FIG. 13 and FIG. 14 show an embodiment of the DC vibration motor (brushless motor) of the present invention
  • FIG. 13 is a longitudinal sectional view
  • FIG. 14 is a sectional view taken along the line A— in FIG. is there.
  • reference numeral 30 denotes a disk-shaped flat case (motor cover) that constitutes the stator 3, and the case 30 includes a case main body 31 (container portion) and a lid 32.
  • a fixed shaft 10 is disposed in the case 30 along the axis thereof, and both ends thereof are fixed to the case 30.
  • [0049] 1 is a flat rotor rotatably supported on the fixed shaft 10 in the case 30.
  • An eccentric weight 7 (weight) connected to a part of the board surface to overlap with 15 and a force are also configured.
  • the rotor 1 has a disk-shaped (or ring-shaped) permanent magnet 5 and a disk-shaped rotor body 15 composed of a holding body 6 (holding metal) for holding the permanent magnet 5 and the rotor body 15.
  • a semi-disc-shaped eccentric weight 7 connected and fixed so as to overlap with a semi-circular portion of the disk surface, and is rotatable to the fixed shaft 10 via a metal bearing 8 at the center of the rotor body 15. It is pivotally supported.
  • 20a, 20a, 20b, and 20b are magnetic poles on the stator side (case side) (the magnetic poles 2a, 2a,
  • the child coins 20a, 20a, 20b, 20b ⁇ are surrounded by the rotating shaft of the rotor 1 (fixed shaft 10).
  • the rotor body 15 is fixed to the inside of the case 30 (the lid body 32) in a state of facing (facing) one rotating surface.
  • FIG. 1 The arrangement of the armature coils 20a, 20a, 20b, 20b of the present embodiment is shown in FIG.
  • the two are configured so that the armature coils are excited with different polarities. That is, the magnetic pole group G
  • the armature coils 20b and 20b of the magnetic pole group G are excited to the S pole.
  • the G armature coils 20b and 20b are excited to the N pole. Therefore, the power of the magnetic pole groups G and G
  • the coil connection of the armature coil is selected so that the armature coil is excited under the above conditions.
  • the magnetic field strength of the armature coil in each of the magnetic pole groups G and G is directed in the rotor rotation direction.
  • the strength of the magnetic field is set so that the armature coil 20a ⁇ the armature coinore 20a, the armature coinole 20b ⁇ the armature coinole 20b! /,
  • Such adjustment of the magnetic field strength (magnetic flux) of the armature coil is performed by changing the coil diameter and Z or the number of the coils.
  • 9 is a coil yoke
  • 11 is a liner.
  • a high-density alloy is usually used for the eccentric weight 7.
  • FIG. 15 and 16 show another embodiment of the DC vibration motor (brushless motor) of the present invention.
  • FIG. 15 is a longitudinal sectional view
  • FIG. 16 is a sectional view taken along the line A-- in FIG. is there.
  • the rotor 1 is configured in a disk shape and one semicircle of the disk is formed.
  • a permanent magnet 5 is provided in the region
  • an eccentric weight 7 is provided in the other semicircular region.
  • the rotor 1 includes a semi-disk (or semi-ring) permanent magnet 5, a semi-disk (or semi-ring) eccentric weight 7, and the permanent magnet 5 and the eccentric weight 7.
  • It is composed of a holding body 6 (holding metal fitting) that is held in a disc shape (or ring shape), and is rotatably supported on a fixed shaft 10 via a metal bearing 8 at the center of the disc.
  • the motor can be made thinner than the embodiment of FIGS. 13 and 14.
  • FIG. 17 and 18 show another embodiment of the DC vibration motor (brushless motor) of the present invention.
  • FIG. 17 is a longitudinal sectional view
  • FIG. 18 is a sectional view taken along the line A-- in FIG. is there.
  • the rotor 1 is configured in a disc shape
  • the permanent magnet 5 is provided in one semicircular region of the disc, and the other semicircular region is provided.
  • the force armature coil having the eccentric weight 7 is fixed to the inside of the case 30 in a state of facing (opposing) the outer peripheral surface of the rotor 1.
  • the rotor 1 includes a disk-shaped (or ring-shaped) holding body 12 (holding metal fitting), a semi-ring-shaped permanent magnet 5 fixed to the outside of the semicircular portion of the holding body 12, and the above-described It consists of a semi-ring-shaped eccentric weight 7 fixed to the outside of the other semicircular part of the holding body 12, and is rotatably supported on the fixed shaft 10 via a metal bearing 8 in the center of the holding body 12.
  • the armature coils have different polarities between the magnetic pole groups G and G.
  • the armature coils 20b and 20b of the magnetic pole group G are excited to the S pole.
  • the G armature coils 20b and 20b are excited to the N pole. Therefore, the power of the magnetic pole groups G and G
  • the coil connection of the armature coil is selected so that the armature coil is excited under the above conditions.
  • the magnetic field strength of the armature coil in each of the magnetic pole groups G and G is directed in the rotor rotation direction.
  • the strength of the magnetic field is set so that the armature coil 20a ⁇ the armature coinore 20a, the armature coinole 20b ⁇ the armature coinole 20b! /,
  • Such adjustment of the magnetic field strength (magnetic flux) of the armature coil is performed by changing the coil diameter and Z or the number of the coils.
  • the thickness of the eccentric weight and the thickness of the armature coil in the embodiment of FIGS. 13 and 14 can be reduced, the thickness of the motor is made thinner than the embodiment of FIGS. be able to.
  • the shaft is rotated on the case 30. It is also possible to support the rotor freely and fix the rotor 1 to this shaft.
  • the rotation center of the rotor 1 may be decentered and further provided with an eccentric weight.
  • FIGS. 19 to 21 show another embodiment of the DC vibration motor (brushless motor) of the present invention.
  • FIG. 19 is a longitudinal sectional view
  • FIG. 20 is a sectional view taken along the line A-- in FIG.
  • FIG. 21 is an explanatory view showing a permanent magnet.
  • Fig. 21 (a) is a plan view of the permanent magnet 5
  • Fig. 21 (b) is a side view.
  • the magnetic poles of this permanent magnet 5 are N- and S-poles at the C-shaped ends, respectively.
  • the C-shaped permanent magnet 5 also serving as an eccentric weight has an angular distance ⁇ from the roll rotation center of 200 to 250 °, more preferably 210 to 240 °, and particularly preferably about 220 to 230 °. Driving power and vibration performance are desirable.
  • FIG. 22 shows another embodiment of the permanent magnet applicable to the DC vibration motor of the present invention including the motor of the embodiment of FIGS. 19 and 20, and FIG. Is a plan view, and FIG. 22 (b) is a side view.
  • This permanent magnet 5 is formed by connecting the ends of two arc-shaped permanent magnets 50a and 50b having N and S poles in the thickness direction so that the N and S poles are opposite in the front and back surfaces.
  • the C-shaped permanent magnet 5 is constructed.
  • FIGS. 23 (A) and (B) show another embodiment of a permanent magnet (magnet rotor) applicable to the DC vibration motor of the present invention.
  • FIG. 23 (A) shows N poles in the circumferential direction.
  • the eccentric rotor 1 is composed of a semicircular permanent magnet 5 having S poles.
  • FIG. 23 (B) shows an eccentric rotor 1 composed of a semicircular permanent magnet 5 having N and S poles in the radial direction.
  • the DC motor in this case has a rotatable motor shaft (output shaft), and the rotor is fixed to the motor shaft.
  • FIG. 24 and 25 show an embodiment in which the DC motor (brushless motor) of the present invention is used as a general-purpose motor.
  • FIG. 24 is a longitudinal sectional view
  • FIG. 25 is a sectional view taken along the line in FIG. It is.
  • the motor shaft 13 extends along the axis of the disk-shaped flat case 30. And is rotatably supported by the case 30 via metal bearings 14a and 14b.
  • the rotor 1 includes a disk-shaped (or ring-shaped) holding body 12 (holding metal fitting) and a ring-shaped permanent magnet 5 fixed to the outer side of the holding body 12. It is fixed to the motor shaft 13 via.
  • FIG. 1 is an explanatory view schematically showing an embodiment (inner rotor type brushless motor) of a DC motor of the present invention.
  • FIG. 2 is an explanatory view schematically showing another embodiment (inner rotor type brushless motor) of the DC motor of the present invention.
  • FIG. 3 is an explanatory view schematically showing another embodiment (inner rotor type brushless motor) of the DC motor of the present invention.
  • ⁇ 4 Explanatory drawing showing an example of a permanent magnet provided in the rotor constituting the DC motor of the present invention
  • FIG. 5 is an explanatory view schematically showing another embodiment (outer rotor type brushless motor) of the DC motor of the present invention.
  • FIG. 6 is an explanatory view schematically showing another embodiment of the DC motor of the present invention (inner rotor type brush motor).
  • FIG. 7 is an explanatory view schematically showing another embodiment of the DC motor of the present invention (outer rotor type brushed motor).
  • FIG. 8 is an overall perspective view showing another embodiment of the direct current motor of the present invention (a brushless motor having an electromagnet having a claw pole structure).
  • FIG. 11 Perspective view showing the cross section of the claw pole of the DC motor shown in FIG. 8.
  • ⁇ 12 Explanatory drawing showing the driving principle of the DC motor of the present invention.
  • FIG. 13 is a longitudinal sectional view showing an embodiment of a DC vibration motor of the present invention.
  • FIG. 21 partially shows the permanent magnet of the DC vibration motor shown in FIG. 19, where (a) is a plan view and (b) is a side view.
  • FIG. 22 Another embodiment of a permanent magnet applicable to the DC vibration motor of the present invention is shown, (a) is a plan view, and (b) is a side view.
  • FIG. 23 is an explanatory view showing another embodiment of a permanent magnet (magnet rotor) applicable to the DC vibration motor of the present invention.
  • FIG. 24 is a longitudinal sectional view showing an embodiment in which the DC motor of the present invention is used as a general-purpose motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Brushless Motors (AREA)

Abstract

Le problème à résoudre dans le cadre de cette invention est de fournir un moteur ne nécessitant pas de circuit de commande complexe, qui soit de structure simple, de coût faible, fin et présente une longue durée de vie et des dimensions réduites. La solution proposée par la présente invention consiste en ce que, d’un rotor (1) et d’un stator (3), l’un possède des aimants permanents (5) et l’autre possède des pôles magnétiques (2). Les pôles (2) consistent en 2n ou davantage de groupes de pôles (G) ayant chacun des pôles magnétiques de même polarité. Les groupes de pôles (G) adjacents dans la direction périphérique autour d’un axe sont disposés de telle sorte que les pôles (2) de chaque groupe de pôles (G) présentent une polarité différente de ceux du groupe suivant et la force du champ magnétique des pôles (2) de chaque groupe de pôles (G) augmente graduellement dans la direction de la rotation du rotor ou dans la direction opposée à la direction de la rotation de telle sorte que le champ magnétique a un gradient.
PCT/JP2006/315806 2005-08-10 2006-08-10 Moteur à courant continu et moteur vibrant à courant continu WO2007018261A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005231565A JP4814574B2 (ja) 2005-08-10 2005-08-10 直流モータ及び直流振動モータ
JP2005-231565 2005-08-10

Publications (1)

Publication Number Publication Date
WO2007018261A1 true WO2007018261A1 (fr) 2007-02-15

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PCT/JP2006/315806 WO2007018261A1 (fr) 2005-08-10 2006-08-10 Moteur à courant continu et moteur vibrant à courant continu

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Country Link
JP (1) JP4814574B2 (fr)
WO (1) WO2007018261A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2536935R1 (es) * 2013-04-26 2015-06-02 Eduardo BERMEJO MOLINER Motor eléctrico de bajo consumo
WO2015193963A1 (fr) * 2014-06-17 2015-12-23 三菱電機株式会社 Compresseur, équipement à cycle de réfrigération, et climatiseur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103084327B (zh) * 2013-01-25 2014-11-05 西安交通大学 一种低功耗激振力方向可调的非接触激振器及控制方法
US10600542B2 (en) * 2016-12-27 2020-03-24 Chad Ashley Vandenberg Polarity-switching magnet diode

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS5889055A (ja) * 1981-11-21 1983-05-27 Nippon Densan Kk ブラシレスモ−タ
JPH0937511A (ja) * 1995-07-21 1997-02-07 Mitsumi Electric Co Ltd 加振用モータ
JP2000032707A (ja) * 1998-07-14 2000-01-28 Seiko Epson Corp 振動モータ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5889055A (ja) * 1981-11-21 1983-05-27 Nippon Densan Kk ブラシレスモ−タ
JPH0937511A (ja) * 1995-07-21 1997-02-07 Mitsumi Electric Co Ltd 加振用モータ
JP2000032707A (ja) * 1998-07-14 2000-01-28 Seiko Epson Corp 振動モータ

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2536935R1 (es) * 2013-04-26 2015-06-02 Eduardo BERMEJO MOLINER Motor eléctrico de bajo consumo
WO2015193963A1 (fr) * 2014-06-17 2015-12-23 三菱電機株式会社 Compresseur, équipement à cycle de réfrigération, et climatiseur
CN106464046A (zh) * 2014-06-17 2017-02-22 三菱电机株式会社 压缩机、制冷循环装置和空调机
JPWO2015193963A1 (ja) * 2014-06-17 2017-04-20 三菱電機株式会社 圧縮機、冷凍サイクル装置、および空気調和機
CN106464046B (zh) * 2014-06-17 2019-05-31 三菱电机株式会社 压缩机、制冷循环装置和空调机
US10739046B2 (en) 2014-06-17 2020-08-11 Mitsubishi Electric Corporation Compressor, refrigeration cycle apparatus, and air conditioner

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