WO2017204425A1 - Équipement électrique à aimant permanent et à longueur de pôle magnétique non uniforme - Google Patents

Équipement électrique à aimant permanent et à longueur de pôle magnétique non uniforme Download PDF

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Publication number
WO2017204425A1
WO2017204425A1 PCT/KR2016/013249 KR2016013249W WO2017204425A1 WO 2017204425 A1 WO2017204425 A1 WO 2017204425A1 KR 2016013249 W KR2016013249 W KR 2016013249W WO 2017204425 A1 WO2017204425 A1 WO 2017204425A1
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WIPO (PCT)
Prior art keywords
winding
phase
teeth
wound
winding current
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Application number
PCT/KR2016/013249
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English (en)
Korean (ko)
Inventor
정시욱
김종무
박병건
안민혁
이지영
전연도
정연호
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한국전기연구원
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Publication of WO2017204425A1 publication Critical patent/WO2017204425A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • 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
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the present invention relates to a permanent magnet electric machine, and in particular, to provide a non-uniform polar arc angle and a special pole slot combination and winding arrangement method for reducing torque pulsation.
  • a general permanent magnet electric machine (hereinafter, referred to as including both linear and rotary types) includes a stator composed of iron cores, a winding wire wound around a stator tooth, and a rotor composed of iron cores and a plurality of permanent magnets attached thereto.
  • the permanent magnet can be classified into a permanent magnet type, a surface-mounted permanent magnet type, etc., and magnetic poles are formed through the permanent magnet attached to the rotor core.
  • the permanent magnet electric machine generates cogging torque due to the magnetic interaction between the permanent magnet and the stator teeth even under no load, which causes torque pulsation, a source of vibration and noise, and deteriorates control performance.
  • permanent magnets having opposite polarities are configured to have a repetitive arrangement at regular intervals, and the arrangement of permanent magnets
  • the gap is defined as the pole gap and corresponds to 180 degrees.
  • the magnetic pole of the permanent magnet has an arc shape, and is generally called a polar arc angle.
  • the width of the permanent magnets may be generally defined as the width of the permanent magnets. In electrical terms, this corresponds to 180 degrees.
  • the polar angle or the permanent magnet width ⁇ of a permanent magnet is generally configured to be the same regardless of the permanent magnet polarity.
  • the present invention provides a non-uniform arc angle or permanent magnet width and a special pole number slot combination and winding arrangement method for reducing torque pulsation in order to solve the above problems.
  • One aspect of the present invention includes a rotor including first and second magnetic poles alternately disposed with the rotor core, the polar angle of the polar angle of the first magnetic pole and the second magnetic pole are different; And a stator core, teeth having teeth arranged at regular intervals along its circumferential direction, and winding wires wound around each tooth, wherein the stator makes relative motion with the rotor.
  • FIG. 1 is a block diagram of a permanent magnet motor having a uniform polar angle of rotation type according to the prior art
  • Figure 2 is a block diagram of a permanent magnet motor having a uniform permanent magnet width of the linear type according to the prior art.
  • FIG. 3 is a block diagram of a torque pulsation reduction permanent magnet electric machine in a 10-pole 12-slot method according to an embodiment of the present invention.
  • FIG. 4 is a first embodiment showing a winding structure of the stator of FIG. 3.
  • FIG. 5 is a second embodiment showing the winding structure of the stator of FIG. 3.
  • Figure 6 is a third embodiment showing the winding structure of the stator in the form of a 14 pole 12 slot.
  • FIG. 7 is a fourth embodiment showing the winding structure of the stator in the form of a 14 pole 12 slot.
  • FIG. 8 is a fifth embodiment showing the winding structure of the stator in the form of a 14 pole 18 slot.
  • FIG. 9 is a sixth embodiment showing the winding structure of the stator in the form of a 22-pole 24-slot.
  • 10 is a seventh embodiment showing the winding structure of the stator in the form of a 22 pole 24 slot.
  • 11 is an eighth embodiment showing the winding structure of the stator in the form of a 26-pole 24-slot.
  • FIG. 12 is a ninth embodiment showing the winding structure of the stator in the form of a 26-pole 24-slot.
  • FIG. 13 is a first embodiment illustrating a magnetic pole structure of the rotor of FIG. 3.
  • FIG. 14 is a second embodiment illustrating a magnetic pole structure of the rotor of FIG. 3.
  • 15 is a third embodiment illustrating a magnetic pole structure of the rotor of FIG. 3.
  • FIG. 16 is a fourth exemplary embodiment illustrating a magnetic pole structure of the rotor of FIG. 3.
  • 17 is a fifth embodiment illustrating a magnetic pole structure of the rotor of FIG. 3.
  • FIG. 18 is a sixth embodiment showing the magnetic pole structure of the rotor of FIG. 3.
  • 19 is a seventh embodiment showing the magnetic pole structure of the rotor of FIG.
  • 20 to 25 are diagrams for comparing the pulsation of the electric machine according to the prior art and the electric machine caulking torque and the output torque according to the present invention.
  • 26 to 28 are diagrams showing a conventional electromotive force of the electric device according to the prior art and the electric device according to the present invention.
  • 29 is a configuration diagram of a permanent magnet electric device according to another embodiment of the present invention.
  • 30 is a graph showing harmonic reduction of a driving voltage during weak field operation.
  • 33 is a block diagram of a torque pulsation reduction permanent magnet electric machine in the 10-pole 12-slot method according to another embodiment of the present invention.
  • 34 is a block diagram of a permanent magnet linear electric machine in the 10-pole 12 slot method according to another embodiment of the present invention.
  • 35 is a configuration diagram of a permanent magnet linear electric machine showing the fault structure of FIG. 34.
  • FIG. 3 is a block diagram of a permanent magnet electric machine in the 10-pole 12 slot method according to an embodiment of the present invention.
  • the permanent magnet electric device includes a stator 200 and a rotor 100 relative to the stator 200.
  • the rotor 100 includes the rotor core 110, the first magnetic poles 120 and the second magnetic poles 130, and the first magnetic poles 120 and the second magnetic poles ( The number of poles 130 is 10.
  • the first magnetic poles 120 and the second magnetic poles 130 are formed of a permanent magnet.
  • the rotor core 110 may be manufactured in a hollow cylindrical shape and may be inserted and installed to have a rotating shaft fixed to a central portion thereof.
  • the first and second magnetic poles 120 and 130 may be alternately disposed at predetermined intervals on an outer circumferential surface thereof. ) May be combined.
  • the first magnetic poles 120 are located in a first symmetrical position with respect to the center of the rotor core 110, and the second magnetic poles 130 are located in a second symmetrical position with respect to the center. .
  • the first magnetic poles 120 and the second magnetic poles 130 are alternately positioned and spaced apart from the outer circumferential surface of the rotor core 110.
  • the first magnetic poles 120 and the second magnetic poles 130 are disposed at equal intervals.
  • the stator 200 includes a stator core 210, twelve teeth 220 disposed at regular intervals along the circumferential direction of the stator core 210, and each tooth 220. It has winding windings 222 wound on.
  • the stator 200 also has slots 230.
  • the slots 230 are twelve. As such, it has ten poles and twelve slots, which is one example, and may have poles and slot numbers satisfying Equation 1 below.
  • the number of poles and the number of slots satisfying Equation 1 are 10 poles and 12 slots, 14 poles and 12 slots, 14 poles and 18 slots, 22 poles and 24 slots, 26 Number of poles and number of 24 slots, and an extended combination (20 poles and 24 slots, 30 poles and 36 slots, 28 poles and 24 slots, etc.), which is an integer multiple of this combination.
  • Such claim pole firing angle ( ⁇ 2) of the first pole firing angle of the magnetic pole (120) ( ⁇ 1) and second magnetic poles (130) are different from each other. That is, when the center of the stator core 210 is a reference, the length of the circumferential direction of the first magnetic pole 120 and the length of the circumferential direction of the second magnetic pole 130 are different from each other to reduce caulking torque and torque pulsation. can do. In other words, it is the width (or length) of the circumferential direction of the lateral surface facing the center of the stator core 210 of the first magnetic pole 120 and the inner surface facing the center of the stator core 210 of the second magnetic pole 130. The widths (or lengths) in the circumferential direction of are different from each other.
  • each of the winding wires need to be connected in series, and in the case of the expansion combination that is an integer multiple of the basic combination, parallel connection or serial connection is possible between the basic combinations combined.
  • the stator 200 has a form of a winding structure consisting of a so-called concentrated winding. More specifically, referring to FIG. 4, the teeth A1 to A4 in the U phase are accompanied by the U phase windings A10 to A40, respectively. Similarly, teeth B1 to B4 in the V phase are accompanied by V phase windings B10 to B40, respectively. In addition, the teeth C1 to C4 in the W phase are accompanied by the W phase windings C10 to C40.
  • the stator teeth are each provided with slots 1-12.
  • One winding of the same phase is wound around the two neighboring teeth. That is, one winding of the same phase is wound every two neighboring teeth. The windings of the same phase wound on two neighboring teeth are connected in series.
  • teeth there are a total of 12 teeth (A1 to C4), for example, between two teeth wound around the U-phase and two teeth wound around the U-phase, two teeth wound around the V-phase and 2 teeth wound around the W-phase respectively. Teeth are located.
  • the centers of the U phases have a mechanical angle of 180 degrees.
  • the centers of phase V also have 180 degrees of mechanical angle with each other, and the centers of phase W have 180 degrees of mechanical angle with each other.
  • the winding current direction for every two neighboring teeth on which one phase is wound may be opposite to the winding current direction of the neighboring teeth.
  • all the windings of each phase are connected in series with each other. That is, the A10 to A40 windings are connected in series with each other, the B10 to B40 windings are connected in series with each other, and the C10 to C40 windings are connected in series with each other.
  • FIG. 4 has a form in which two windings are wound in a slot, alternatively, one winding may be wound in a slot, and FIG. 5 shows an embodiment thereof.
  • the stator 200 has a form of a winding structure composed of so-called concentrated windings. More specifically, two of the teeth A1 to A4 in the U phase carry the U phase windings A10 and A20, respectively. Similarly, two of the teeth B1 to B4 in the V phase carry the V phase windings B10 and B20, respectively. In addition, two of the teeth C1 to C4 in the W phase carry the W phase windings C10 and C20. A winding of one phase is wound around one of the two neighboring teeth.
  • the U-phase winding A10 is wound around one tooth A1 of two neighboring teeth A1 and A2.
  • the V-phase winding B10 is wound around one tooth B1 of two neighboring teeth B1 and B2.
  • the winding of W phase C10 is wound around one of the next two neighboring teeth C1 and C2. This winding pattern on U, V, W is repeated with the current direction reversed.
  • teeth For example, between one tooth wound around the U-phase winding and one tooth wound next to the U-phase winding, there is one tooth wound around the V-phase and one wound around the W-phase, respectively. Teeth are located.
  • the winding current direction for each tooth to which the phase is wound may be opposite to the winding current direction of the neighboring tooth.
  • one tooth A4 on which the U phase is wound is wound counterclockwise, the next tooth B1 is clockwise rotated, and the next tooth C1 is wound counterclockwise again. It may also be wound in the opposite direction.
  • all the windings of each phase are connected in series with each other. That is, the A10 and A20 windings are connected in series with each other, the B10 and B20 windings are connected in series with each other, and the C10 and C20 windings are connected in series with each other.
  • Figure 6 shows the windings in the case of different poles, 14 poles and 12 slots.
  • teeth A1 and A2 are wound around the U-phase winding, and B1 and B2 are wound next to the V-phase winding, and C1 and C2 are wound next to the W-phase winding. do. This condition is repeated with the winding current direction reversed.
  • the stator 200 has a form of a winding structure composed of so-called concentrated windings. More specifically, the teeth A1 to A4 in the U phase carry the U phase windings A10 to A40 respectively. Similarly, teeth B1 to B4 in the V phase are accompanied by V phase windings B10 to B40, respectively. In addition, the teeth C1 to C4 in the W phase are accompanied by the W phase windings C10 to C40.
  • One winding of the same phase is wound around the two neighboring teeth. That is, one winding of the same phase is wound every two neighboring teeth.
  • the centers of the U phases have a mechanical angle of 180 degrees.
  • the centers of phase V also have 180 degrees of mechanical angle with each other, and the centers of phase W have 180 degrees of mechanical angle with each other.
  • the winding current direction for every two neighboring teeth on which one phase is wound may be opposite to the winding current direction of the neighboring teeth.
  • the first tooth A1 has a countercurrent direction and the next tooth A2 has a winding current direction in a clockwise direction.
  • the first tooth may be clockwise and the next tooth counterclockwise.
  • the first tooth B1 is clockwise and the next tooth B2 is the winding current direction in the counterclockwise direction.
  • the first tooth may be counterclockwise and the next tooth clockwise in the winding current direction.
  • the first tooth C1 is counterclockwise, and the next tooth C2 is the winding current direction in the clockwise direction.
  • the first tooth may be clockwise and the next tooth counterclockwise. This configuration is repeated with the current direction reversed.
  • all the windings of each phase are connected in series with each other. That is, the A10 to A40 windings are connected in series with each other, the B10 to B40 windings are connected in series with each other, and the C10 to C40 windings are connected in series with each other.
  • FIG. 6 has a form in which two windings are wound in a slot
  • one winding may be wound in a slot
  • FIG. 7 shows an embodiment and the winding structure is the same as that of FIG. 5.
  • the stator 200 has a form of a winding structure composed of a so-called concentrated winding. More specifically, two of the teeth A1 to A4 in the U phase carry the U phase windings A10 and A20, respectively. Similarly, two of the teeth B1 to B4 in the V phase carry the V phase windings B10 and B20, respectively. In addition, two of the teeth C1 to C4 in the W phase carry the W phase windings C10 and C20. A winding of one phase is wound around one of the two neighboring teeth.
  • the U-phase winding A10 is wound around one tooth A1 of two neighboring teeth A1 and A2.
  • the V-phase winding B10 is wound around one tooth B1 of two neighboring teeth B1 and B2.
  • the winding of W phase C10 is wound around one of the next two neighboring teeth C1 and C2. This winding pattern on U, V, W is repeated with the winding current direction reversed.
  • teeth For example, between one tooth wound around the U-phase winding and one tooth wound next to the U-phase winding, there is one tooth wound around the V-phase and one wound around the W-phase, respectively. Teeth are located.
  • the winding current direction for each tooth to which the phase is wound may be opposite to the winding current direction of the neighboring tooth.
  • one tooth A1 in which the U phase is wound is counterclockwise, and the next tooth B1 is clockwise in the clockwise direction, and the next tooth C1 is again counterclockwise.
  • Winding current direction It can also be the winding current direction in the opposite direction.
  • all the windings of each phase are connected in series with each other. That is, the A10 and A20 windings are connected in series with each other, the B10 and B20 windings are connected in series with each other, and the C10 and C20 windings are connected in series with each other.
  • FIGS. 4 to 7 show winding arrangements for 12 slots.
  • windings may be arranged in the same manner even when the slots are increased.
  • Fig. 8 shows the winding arrangement in the case of 18 slots in 14 poles, the first teeth of the U phase become the winding current direction in the counterclockwise direction, and the next of the teeth V phase of the winding current direction in the counterclockwise direction. In the next tooth, the W phase becomes the winding current direction counterclockwise.
  • the W phase becomes the winding current direction in the clockwise direction for the next tooth
  • the U phase becomes the winding current direction in the clockwise direction for the next tooth
  • the V current becomes the winding current direction in the clockwise direction for the next tooth.
  • the V-phase becomes the winding current direction counterclockwise for the next tooth
  • the W-phase becomes the winding current direction counter-clockwise for the next tooth
  • the U-phase becomes the winding current direction for the next tooth.
  • all the windings of each phase are connected in series with each other. That is, the A10 to A60 windings are connected in series with each other, the B10 to B60 windings are connected in series with each other, and the C10 to C60 windings are connected in series with each other.
  • Figure 9 shows the winding arrangement of the 22-pole 24 slot, the first tooth (A1) the U phase is the winding current direction in the counterclockwise direction, the next tooth (A2) the U phase is the winding current direction, clockwise, In the tooth A3, the U phase becomes the winding current direction in the counterclockwise direction, and in the tooth A4, the U phase becomes the winding current direction in the clockwise direction.
  • the V phase becomes the winding current direction in the clockwise direction, the counterclockwise direction, the clockwise direction, and the counterclockwise direction.
  • the W phase becomes the winding current direction in the counterclockwise direction, clockwise direction, and counterclockwise direction.
  • all the windings of each phase are connected in series with each other. That is, the A10 to A80 windings are connected in series with each other, the B10 to B80 windings are connected in series with each other, and the C10 to C80 windings are connected in series with each other.
  • FIG. 10 shows the winding arrangement in the case where a winding is wound in a single layer in a slot in a 22-pole 24 slot, specifically, the U-phase winding A10 in one tooth A1 of two neighboring teeth A1 and A2. ) Is wound with the winding current direction in the counterclockwise direction. Then, the V-phase winding B10 is wound around the teeth B1 of one of the two neighboring teeth B1 and B2 next in the clockwise direction. The winding B20 of the V phase is wound around the teeth B3 of one of the two neighboring teeth B3 and B4 next with the winding current direction in the clockwise direction.
  • the winding C10 of the W phase is wound with the winding current direction in the counterclockwise direction to one tooth C2 of the next two neighboring teeth C1 and C2.
  • the winding C20 of the W phase is wound around the teeth C3 of one of the two neighboring teeth C3 and C4 next with the winding current direction counterclockwise.
  • the winding A20 of the U phase is then wound around the teeth A3 of one of the two neighboring teeth A3 and A4 with the winding current direction in the clockwise direction. This pattern is then repeated with the winding current direction reversed.
  • all the windings of each phase are connected in series with each other. That is, the A10 to A40 windings are connected in series with each other, the B10 to B40 windings are connected in series with each other, and the C10 to C40 windings are connected in series with each other.
  • Fig. 11 shows the winding arrangement of the 26-pole 24-slot, in which the U-phase becomes the winding current direction in the counterclockwise-clockwise-counterclockwise-clockwise direction from the first tooth to the four neighboring teeth, In the four teeth, the V phase becomes the winding current direction clockwise-counterclockwise-clockwise-counterclockwise.The next four teeth are W-clocked counterclockwise-clockwise-counterclockwise- The winding current is clockwise. The winding arrangement described above is then repeated with the winding current direction reversed.
  • all the windings of each phase are connected in series with each other. That is, the A10 to A80 windings are connected in series with each other, the B10 to B80 windings are connected in series with each other, and the C10 to C80 windings are connected in series with each other.
  • FIG. 12 shows the winding arrangement in the case where a winding is wound in a single layer in a slot in a 26-pole 24 slot, specifically, a U-phase winding A10 on one tooth A1 of two neighboring teeth A1 and A2.
  • the U-phase winding A20 is wound around the teeth A3 of one of the two neighboring teeth A3 and A4 next to each other with the winding current direction in the counterclockwise direction.
  • the winding B10 of V phase is wound around the teeth B1 of one of the two neighboring teeth B1 and B2 next in the clockwise direction.
  • the winding B20 of the V phase is wound around the teeth B3 of one of the two neighboring teeth B3 and B4 next with the winding current direction in the clockwise direction.
  • the winding C10 of the W phase is wound around the teeth C1 of one of the two neighboring teeth C1 and C2 having the winding current direction in the counterclockwise direction, and the next two teeth C3 and the next neighboring teeth C1 and C2 are wound.
  • the winding C20 of the W phase is wound with the winding current direction counterclockwise. The winding arrangement described above is then repeated with the winding current direction reversed.
  • all the windings of each phase are connected in series with each other. That is, the A10 to A40 windings are connected in series with each other, the B10 to B40 windings are connected in series with each other, and the C10 to C40 windings are connected in series with each other.
  • FIG. 13 is a diagram illustrating a first embodiment of the rotor of FIG. 3.
  • the rotor of FIG. 3 includes a rotor core 110 substantially on an inner circumferential surface to which the rotating shaft is fixed.
  • the rotor comprises first magnetic poles 120 consisting of five permanent magnets consisting of rare earth magnets containing, for example, neodymium and dysprosium.
  • the first magnetic poles 120 made of five permanent magnets have the same magnetic polarity as the N pole or the S pole, and are mounted on the outer circumferential surface of the core 110.
  • the first magnetic poles 120 of the five permanent magnets are arranged in the circumferential direction at regular intervals therebetween.
  • each of the permanent magnets is bent at a constant radius of curvature around the central axis of the rotating shaft.
  • the core 110 includes second magnetic poles 130 each having five protrusions radially outwardly arranged between the first magnetic poles composed of five permanent magnets and arranged in a circumferential direction at a constant pitch. It is provided.
  • the magnet polarity of the five permanent magnets causes the five protrusions to eventually magnetize to the same magnet polarity as opposed to the magnet polarity of the five permanent magnets, the second magnetic pole consisting of these protrusions May be referred to hereinafter as a 'consequent pole'.
  • the core 110 includes a space 140 between the first magnetic poles 120 made of permanent magnets and the second magnetic pole 130 made of a sequence pole, which is formed of the permanent magnets.
  • a magnetic barrier is provided between the first stimulus 120 made up and the second stimulus 130 made up of a sequence pole.
  • the outer surface of the second pole 130, consisting of each sequence pole, is curved with a constant radius of curvature around the central axis of the rotating shaft. Magnetic interaction between each pole of the rotor 110 (the first magnetic pole 120 made of permanent magnets and the second magnetic pole 130 made of a sequence pole) causes the rotor 110 to rotate. Generate torque.
  • the polar angle of the first magnetic pole 120 and the polar angle of the second magnetic pole 130 are different.
  • FIG. 14 illustrates an embodiment in which the first magnetic pole 120 made of a permanent magnet is surface-attached to the rotor core 110.
  • FIG. 15 illustrates a form in which the first magnetic pole 120 and the second magnetic pole 130 made of ten permanent magnets are embedded in the rotor core 110.
  • the rotor has a rotor core 110, first poles 120 and second poles 130 made of ten permanent magnets installed around the rotor core 110.
  • the first magnetic poles 120 and the second magnetic poles 130 are alternately formed, and a groove 140 is formed between the first magnetic poles 120 and the second magnetic poles 130.
  • the polar angles of the first magnetic poles 120 and the second magnetic poles 130 are different.
  • FIG. 16 illustrates another embodiment in which the first magnetic poles 120 made of permanent magnets are not embedded in the rotor core 110 but attached to the surface.
  • FIG. 17 shows another embodiment of the rotor.
  • another embodiment of the rotor includes a rotor core 110, first teeth 120-1 protruding radially about a rotation axis of the rotor core 110, and the first teeth.
  • Second teeth 130-protruding radially about a rotation axis of the first magnetic pole 120 and the rotor core 110 made of the first windings 120-2 wound on the teeth 120-1.
  • the first teeth 120-1 and the second teeth 130-1 are alternately formed.
  • the rotor core 110 may be formed to have a circular cross section as an axis serving as a rotation center of the rotor.
  • the core 110 is a part that becomes the main body of the rotor, may be installed in close contact with the outer diameter surface of the rotating shaft, the plurality of teeth (120-1, 130-1) protruding radially around the rotating shaft It may include.
  • the number of teeth 120-1 and 130-1 is not limited to the embodiment of the present invention and may be appropriately adjusted for stable driving characteristics of the motor.
  • the teeth 120-1 and 130-1 may include extension parts 120-3 and 130-3 whose ends extend in the circumferential direction so as to correspond to the inner diameter surface of the stator.
  • the windings 120-2 and 130-2 are wound around the teeth 120-1 and 130-1, respectively, to generate a magnetic field by an external power source. Unlike a motor in which a permanent magnet is inserted into the rotor, in the embodiment of the present invention, a magnetic field is generated by supplying current to the coils 120-2 and 130-2 wound on the rotor.
  • FIG. 18 is a view showing still another embodiment of the rotor.
  • another embodiment of the rotor includes a rotor core 110, first teeth 120-1 protruding radially about a rotation axis of the rotor core 110, and the first teeth.
  • the first teeth 120-1 and the second teeth 130-1 are alternately formed.
  • the rotor core 110 may be formed to have a circular cross section as an axis serving as a rotation center of the rotor.
  • the core 110 is a part that becomes the main body of the rotor, may be installed in close contact with the outer diameter surface of the rotating shaft, the plurality of teeth (120-1, 130-1) protruding radially around the rotating shaft It may include.
  • the winding 120-2 is wound around one tooth 120-1 among the teeth 120-1 and 130-1, and the permanent magnet 130-2 is wound around the other tooth 130-1. This is purchased.
  • the teeth 120-1 on which the windings 120-2 are wound may include an extension 120-3 whose end portion extends in the circumferential direction so as to correspond to the inner diameter surface of the stator.
  • the winding 120-2 is wound around the tooth 120-1 to generate a magnetic field by an external power source.
  • a current is supplied to the winding 120-2 wound on the rotor to generate a magnetic field together with the permanent magnet.
  • 19 is a view showing still another embodiment of the rotor.
  • another embodiment of the rotor includes the rotor core 110, first teeth 120-1 protruding radially about the axis of rotation of the rotor core 110, and the first teeth.
  • the first teeth 120-1 and the second teeth 130-1 are alternately formed.
  • the rotor core 110 may be formed to have a circular cross section as an axis serving as a rotation center of the rotor.
  • the core 110 is a part that becomes the main body of the rotor, may be installed in close contact with the outer diameter surface of the rotating shaft, the plurality of teeth (120-1, 130-1) protruding radially around the rotating shaft It may include.
  • the winding 120-2 is wound around one tooth 120-1 among the teeth 120-1 and 130-1, and the permanent magnet 130-2 is wound around the other tooth 130-1. Is formed.
  • the teeth 120-1 on which the windings 120-2 are wound may include an extension 120-3 whose end portion extends in the circumferential direction so as to correspond to the inner diameter surface of the stator.
  • the winding 120-2 is wound around the tooth 120-1 to generate a magnetic field by an external power source.
  • a current is supplied to the winding 120-2 wound on the rotor to generate a magnetic field together with the permanent magnet.
  • 20 to 25 are diagrams for comparing the pulsation of the caulking torque and the output torque of the electric device according to the prior art and the electric device according to the present invention.
  • FIG. 20 illustrates a uniform polar angle as an electric device according to the prior art
  • FIG. 21 illustrates an electrical device according to the present invention, and the polar angle is not uniform. That is, in FIG. 20, the polar angle is constant at 145 degrees, and FIG. 21 is different from the repeated 130 degrees and 160 degrees.
  • FIGS. 22 and 23 show the counter electromotive force according to the position of the rotor according to the related art and the present invention (that is, the electric angle).
  • the dotted line represents the counter electromotive force according to the prior art, Other counter electromotive force is shown in this invention.
  • the caulking torque is shown in Figure 24, the caulking torque is non-uniform polar angle is 97% less than the uniform polar angle.
  • FIG. 25 shows an output torque waveform in which the nonuniform polar angle is reduced by 67% compared to the uniform polar angle.
  • FIGS. 26 to 28 are diagrams showing phase electromotive force of an electric device according to the prior art and an electric device according to the present invention.
  • FIG. 26 shows a uniform polar angle as an electric device according to the prior art
  • FIG. 27 shows an electrical device according to the present invention, and the polar angle is not uniform. That is, in FIG. 28, the polar angle is constant at 145 degrees, and FIG. 27 is different from the repeated 130 degrees and 160 degrees.
  • the counter electromotive force has the same characteristics under the premise that the total amount of permanent magnets is the same as can be seen from FIG. 28.
  • torque is expressed as the product of back EMF and phase current, so that torque pulsation can be reduced without loss of torque.
  • Figure 29 is a partial configuration diagram of the abrupt type permanent magnet electric device of the con- cept pole structure according to another embodiment of the present invention.
  • the stator 1100 moves against the rotor 2100, and the stator 1100 is a plurality of teeth 1110 of N (number of power phases) and winding wires wound around each tooth (not shown).
  • the rotor 2100 may include first magnetic poles 2110 and second magnetic poles 2120 formed therein. The first magnetic poles 2110 and the second magnetic poles 2120 are alternately arranged.
  • the first magnetic poles 2110 are made of permanent magnets, and may be disposed as all the N poles or all the S poles with the same polarity.
  • the second stimulus 2120 is composed of a sequence pole.
  • the stator 1100 includes phase windings for each of the N (number of power phases) phases and phase windings having a phase difference of 180 degrees with each of the N phases.
  • the rotor 1100 has phase windings for three phases U, V, and W, and a 180 degree phase difference (/ U, / V, / W) with each of the three phases. It may include merchant wires having.
  • the shortest distance between the teeth of the stator is called SO
  • the longest distance is called SWID
  • the thickness of the rotor permanent magnet is LM.
  • Harmonic reduction of the driving voltage during field operation is shown
  • FIG. 31 shows the output torque improvement
  • FIG. 32 shows the output improvement during the field weakening operation.
  • FIG. 30 shows harmonics when SO is 7, SWID is 11, and LM is 6 at uniform polar angle, and (b) is SO at 7 and SWID is 11 at non-uniform polar angle.
  • the polar arc is one of 170 degrees, the other one is 95 degrees, and the LM is 6 to show harmonic characteristics.
  • the electric equipment of the present invention shows that the harmonics are reduced than the electric equipment of the prior art.
  • Figure 31 shows the output torque according to the current phase angle change shows that the output torque is improved than when the electric device of the present invention has a uniform polar angle of the prior art.
  • Figure 32 shows the output according to the speed, the electric device of the present invention can be seen that the output is improved than the electric device of the prior art.
  • Figure 33 is a block diagram of a permanent magnet electric machine in a 10-pole 12 slot method according to another embodiment of the present invention.
  • the permanent magnet electric device in the 10-pole 12 slot system according to another embodiment of the present invention, includes a rotor 100 and a stator 200 rotatably supporting the rotor 100. .
  • the rotor 100 includes the rotor core 110, the first magnetic poles 120 and the second magnetic poles 130, and the first magnetic poles 120 and the second magnetic poles ( The number of poles 130 is 10.
  • the first magnetic poles 120 and the second magnetic poles 130 are formed of a permanent magnet.
  • the rotor core 110 may be manufactured in a hollow cylindrical shape and may be inserted and installed to have a rotating shaft fixed to a central portion thereof.
  • the first and second magnetic poles 120 and 130 may be alternately disposed at predetermined intervals on an outer circumferential surface thereof. ) May be combined.
  • the first magnetic poles 120 are located in a first symmetrical position with respect to the center of the rotor core 110, and the second magnetic poles 130 are located in a second symmetrical position with respect to the center. .
  • the first magnetic poles 120 and the second magnetic poles 130 are alternately positioned and spaced apart from the outer circumferential surface of the rotor core 110.
  • the first magnetic poles 120 and the second magnetic poles 130 are disposed at equal intervals.
  • the stator 200 has a stator core 210 and upper winding lines 222 disposed at regular intervals along its circumferential direction inside the stator core 210.
  • the permanent magnet electric device according to another embodiment of FIG. 33 is different from FIG. 3 because it is configured as a concentric type without teeth, unlike FIG. 3.
  • other parts than this structure may be formed in the same manner as the structure of FIG. 3, and have 10 poles and 12 slots. These poles and slots are one example and may have a pole number and a slot number satisfying Equation (1).
  • the electrode firing angle of the firing angle of the magnetic poles of the first pole (120) ( ⁇ 1) and the second magnetic pole (130) ( ⁇ 2) are different from each other thereby to reduce the cogging torque and torque pulsation.
  • each of the winding wires need to be connected in series, and in the case of the expansion combination that is an integer multiple of the basic combination, parallel connection or serial connection is possible between the basic combinations combined.
  • This wiring method can be used if the above description does not contradict each other.
  • both the stator and the core may be included.
  • 34 is a block diagram of a permanent magnet linear electric machine in the 10-pole 12 slot method according to another embodiment of the present invention.
  • the mover 300 moves against the stator 400.
  • the mover 300 has a mover core 310 and a plurality of teeth 320 formed on the mover core 310 and a winding wire wound around each tooth
  • the stator 400 includes a stator core 410 and a stator core.
  • First poles 420 and second poles 430 formed at 410 are included, and the number of poles of the first poles 420 and the second poles 430 is ten.
  • the first magnetic poles 420 and the second magnetic poles 430 are formed of a permanent magnet.
  • the first magnetic poles 420 and the second magnetic poles 430 are alternately positioned and spaced apart from the outer circumferential surface of the stator core 410.
  • the first magnetic poles 420 and the second magnetic poles 430 are arranged at equal intervals.
  • the permanent magnet linear electric device according to still another embodiment of FIG. 34 is different from FIG.
  • other parts than this structure may be formed in the same manner as the structure of FIG. 3, and have 10 poles and 12 slots.
  • These poles and slots are one example and may have a pole number and a slot number satisfying Equation (1).
  • the width ⁇ 1 of the first magnetic pole 420 as described above ) And the width of the second magnetic pole 430 ( ⁇ 2) ) are different from each other, so that caulking torque and torque pulsation can be reduced.
  • each of the winding wires need to be connected in series, and in the case of the expansion combination that is an integer multiple of the basic combination, parallel connection or serial connection is possible between the basic combinations combined.
  • This wiring method can be used if the above description does not contradict each other.
  • the mover 300 has a form of a winding structure consisting of a so-called concentrated winding. More specifically, the teeth A1 to A4 in the U phase carry the U phase windings A10 to A40 respectively. Similarly, teeth B1 to B4 in the V phase are accompanied by V phase windings B10 to B40, respectively. In addition, the teeth C1 to C4 in the W phase are accompanied by the W phase windings C10 to C40.
  • the mover teeth each have slots 1-12.
  • One winding of the same phase is wound around the two neighboring teeth. That is, one winding of the same phase is wound every two neighboring teeth.
  • the U-phase windings A40 and A10 are wound around two neighboring teeth A4 and A1.
  • the V-phase windings B10 and B20 are wound around two neighboring teeth B1 and B2.
  • the windings C10 and C20 of the W phase are wound around the next two neighboring teeth C1 and C2.
  • teeth there are a total of 12 teeth (A1 to C4), for example, between two teeth wound around the U-phase and two teeth wound around the U-phase, two teeth wound around the V-phase and 2 teeth wound around the W-phase respectively. Teeth are located.
  • the centers of the U phases have electrical angles of 180 degrees with each other.
  • the centers of phase V also have electrical angles of 180 degrees with each other, and the centers of phase W have 180 degrees of electrical angles with each other.
  • the winding current direction for every two neighboring teeth on which one phase is wound may be opposite to the winding current direction of the neighboring teeth.
  • FIG. 34 has a form in which two windings are wound in a slot, alternatively, one winding may be wound in a slot, and FIG. 35 shows the embodiment.
  • the mover 300 has a form of a winding structure composed of so-called concentrated windings. More specifically, two of the teeth A1 to A4 in the U phase each carry a U phase winding A10.A20. Similarly, two of the teeth B1 to B4 in the V phase carry the V phase windings B10 and B20, respectively. In addition, two of the teeth C1 to C4 in the W phase carry the W phase windings C10 and C20. A winding of one phase is wound around one of the two neighboring teeth.
  • the U-phase winding A10 is wound around one tooth A4 of two neighboring teeth A4 and A1.
  • the V-phase winding B10 is wound around one tooth B1 of two neighboring teeth B1 and B2.
  • the winding of W phase C10 is wound around one of the next two neighboring teeth C1 and C2.
  • teeth For example, between one tooth wound around the U-phase winding and one tooth wound next to the U-phase winding, there is one tooth wound around the V-phase and one wound around the W-phase, respectively. Teeth are located.
  • the winding current direction for each tooth to which the phase is wound may be opposite to the winding current direction of the neighboring tooth.
  • One tooth A4 on which the U phase is wound is counterclockwise, and the next tooth B1 is clockwise in the clockwise direction, and the next tooth C1 is again counterclockwise in the winding current direction. It can also be the winding current direction in the opposite direction.
  • This wiring method can be used if the above description does not contradict each other.
  • the combination is divided by two.
  • the phase winding arrangement (/ A, A, B, / B, / C, C) in six slots is characterized by having a phase of 180 degrees electrically from each other.
  • the winding current direction of the winding of the first P / 2 pole and the slot of Q / 2 and the winding current of the winding of the remaining P / 2 pole and the slot of Q / 2 The direction is characterized by having an electrical phase of 180 degrees.
  • each merchant wire must be connected in series to eliminate magnetic inequality.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

La présente invention porte sur un équipement électrique à aimant permanent et, plus particulièrement, sur un équipement électrique à aimant permanent qui possède, dans le but de réduire l'ondulation de couple, des angles de pas polaire non uniformes et un nombre de pôles et des combinaisons de fentes correspondants. En outre, l'équipement électrique à aimant permanent est pourvu : d'un rotor comprenant des premiers et seconds pôles magnétiques agencés en alternance avec un noyau de rotor, l'angle de pas polaire des premiers pôles magnétiques et l'angle de pas polaire des seconds pôles magnétiques étant différents l'un de l'autre ; d'un stator comprenant un noyau de stator, des dents disposées à intervalles réguliers sur le côté interne du noyau de stator dans la direction circonférentielle du noyau de stator, et des fils d'enroulement de phase enroulés autour de chaque dent, le stator soutenant le rotor de façon à pouvoir tourner. Par conséquent, la présente invention possède des angles de pas polaire non uniformes et un nombre de pôles et des combinaisons de fentes correspondants, ce qui permet de réduire l'ondulation de couple.
PCT/KR2016/013249 2016-05-26 2016-11-17 Équipement électrique à aimant permanent et à longueur de pôle magnétique non uniforme WO2017204425A1 (fr)

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WO2022015096A1 (fr) * 2020-07-17 2022-01-20 엘지이노텍 주식회사 Moteur

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KR102589674B1 (ko) * 2018-01-31 2023-10-16 엘지이노텍 주식회사 로터 및 이를 포함하는 모터
CN112600327B (zh) * 2020-12-09 2022-07-29 珠海格力电器股份有限公司 永磁同步电机及洗衣机

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JPH09327139A (ja) * 1996-06-04 1997-12-16 Shibaura Eng Works Co Ltd 電動機用ロータ
EP1128321A2 (fr) * 2000-02-24 2001-08-29 Nokia Mobile Phones Ltd. Dispositif à rouleau
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