WO2020066482A1 - 界磁巻線型回転電機 - Google Patents

界磁巻線型回転電機 Download PDF

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Publication number
WO2020066482A1
WO2020066482A1 PCT/JP2019/034474 JP2019034474W WO2020066482A1 WO 2020066482 A1 WO2020066482 A1 WO 2020066482A1 JP 2019034474 W JP2019034474 W JP 2019034474W WO 2020066482 A1 WO2020066482 A1 WO 2020066482A1
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WIPO (PCT)
Prior art keywords
notch
stator
main
electric machine
winding
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2019/034474
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English (en)
French (fr)
Japanese (ja)
Inventor
瀬口　正弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
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 Denso Corp filed Critical Denso Corp
Priority to CN201980063648.4A priority Critical patent/CN112789787B/zh
Publication of WO2020066482A1 publication Critical patent/WO2020066482A1/ja
Priority to US17/201,714 priority patent/US11502562B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/02—Synchronous motors
    • H02K19/10—Synchronous motors for multi-phase current
    • H02K19/12—Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing
    • 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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/246—Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/26—Synchronous generators characterised by the arrangement of exciting 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
    • H02K3/487—Slot-closing devices
    • 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
    • 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
    • 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

Definitions

  • the present disclosure relates to a field winding type rotating electric machine.
  • the stator includes a stator core, a plurality of teeth arranged in the circumferential direction, and protruding radially from the stator core, and a stator winding wound around the teeth.
  • the rotor has a rotor core, a plurality of main poles arranged in the circumferential direction, and protruding from the rotor core toward the stator in the radial direction, and a field winding wound around the main pole.
  • Each tooth and each main pole portion extend in the axial direction.
  • each of both ends in the circumferential direction that faces the stator in the radial direction is referred to as a main extreme portion.
  • Slots that open radially toward the rotor are formed between adjacent teeth in the circumferential direction.
  • the present disclosure has a main object to provide a field winding type rotary electric machine capable of reducing torque ripple.
  • the present disclosure relates to a stator having a stator core, a plurality of teeth arranged in a circumferential direction, and teeth protruding radially from the stator core, and a stator having a stator winding wound around the teeth.
  • a rotor having a rotor core, a plurality of main pole portions provided in a circumferential direction and projecting from the rotor core toward the stator in a radial direction, and a field winding wound around the main pole portion.
  • the teeth and the main poles extend in an axial direction
  • the main pole portion in a case where each of both ends in the circumferential direction is opposed to the stator in the radial direction and each of the main pole portions is a main extreme portion, at least one of the pair of main extreme portions forming the main pole portion
  • a cutout is formed in a part in the axial direction.
  • At least one of the pair of main extreme portions constituting the main pole portion has a cutout in a part in the axial direction.
  • FIG. 1 is an overall configuration diagram of a control system for a rotating electric machine according to a first embodiment
  • FIG. 2 is a diagram showing an electric circuit provided in the rotor
  • FIG. 3 is a cross-sectional view of the rotor and the stator
  • FIG. 4 is a perspective view of the rotor
  • FIG. 5 is a plan view of a field plate part constituting the rotor
  • FIG. 6 is a diagram for explaining the width dimension of the notch
  • FIG. 7 is a diagram showing a main pole portion extending in the axial direction
  • FIG. 1 is an overall configuration diagram of a control system for a rotating electric machine according to a first embodiment
  • FIG. 2 is a diagram showing an electric circuit provided in the rotor
  • FIG. 3 is a cross-sectional view of the rotor and the stator
  • FIG. 4 is a perspective view of the rotor
  • FIG. 5 is a plan view of a field plate part constituting the rotor
  • FIG. 6 is
  • FIG. 8 is a diagram showing changes in a fundamental current, a harmonic current, and the like.
  • FIG. 9 is a diagram showing the transition of the three-phase current
  • FIG. 10 is a diagram showing transitions of a fundamental current, a harmonic current, and the like.
  • FIG. 11 is a diagram showing the transition of the three-phase current
  • FIG. 12 is a diagram showing a generation pattern of an induced voltage
  • FIG. 13 is a diagram illustrating an electric circuit corresponding to patterns 2 and 3.
  • FIG. 14 is a time chart for explaining the effect of reducing the torque ripple.
  • FIG. 15 is a perspective view of a rotor according to the second embodiment
  • FIG. 16 is a perspective view of a regulating member
  • FIG. 17 is a partially enlarged view of a cross section of the rotor
  • FIG. 18 is a partially enlarged view of a cross section of the rotor
  • FIG. 19 is a diagram showing a main pole portion extending in the axial direction according to another embodiment
  • FIG. 20 is a cross-sectional view of a rotor and a stator according to another embodiment
  • FIG. 21 is a cross-sectional view of a rotor and a stator according to another embodiment.
  • the rotating electric machine according to the present embodiment is mounted on, for example, a vehicle.
  • parts that are the same or equivalent to each other are given the same reference numerals in the drawings, and the description of the parts with the same reference numerals is used.
  • the rotating electric machine according to the present embodiment will be described with reference to FIGS.
  • the control system includes a DC power supply 10, an inverter 20, a rotating electric machine 30, and a control device 40.
  • a field winding type synchronous machine is used as the rotating electric machine 30.
  • the control device 40 controls the rotating electric machine 30 so that the rotating electric machine 30 functions as an ISG (Integrated Starter Generator) or an MG (Motor Generator) which is both a motor and a generator.
  • an electromechanical integrated driving device is configured by including the rotating electric machine 30, the inverter 20, and the control device 40, or the rotating electric machine 30, the inverter 20, and the control device 40 are each configured by each component.
  • the rotating electric machine 30 includes the rotor 60 having the field winding 70.
  • the field winding 70 is composed of a series connection of a first winding 71a and a second winding 71b.
  • the field winding 70 is formed by, for example, compression molding. Thereby, the space factor is improved, and the assemblability of the field winding is improved.
  • the field winding 70 may be made of, for example, an aluminum wire.
  • the aluminum wire has a small specific gravity and can reduce the centrifugal force when the rotor 60 rotates.
  • Aluminum wire has lower strength and hardness than copper wire, and is suitable for compression molding.
  • the rotating electric machine 30 includes the stator 50 having the stator winding 31.
  • the stator winding 31 is made of, for example, a copper wire, and includes U, V, and W-phase windings 31U, 31V, and 31W arranged in a state of being shifted from each other by 120 degrees in electrical angle.
  • Inverter 20 includes a series connection of U, V, W phase upper arm switches SUp, SVp, SWp and U, V, W phase lower arm switches SUn, SVn, SWn.
  • the U, V, W phase windings 31U, 31V, 31W are connected to the connection points between the U, V, W phase upper arm switches SUp, SVp, SWp and the U, V, W phase lower arm switches SUn, SVn, SWn.
  • the second ends of the U, V, W phase windings 31U, 31V, 31W are connected at a neutral point. That is, in the present embodiment, the U, V, and W phase windings 31U, 31V, and 31W are star-connected.
  • each of the switches SUp to SWn is an IGBT.
  • a freewheel diode is connected in anti-parallel to each of the switches SUp, SVp, SWp, SUn, SVn, and SWn.
  • the positive terminal of the DC power supply 10 is connected to the collectors of the U-, V-, and W-phase upper arm switches SUp, SVp, SWp.
  • the negative terminal of the DC power supply 10 is connected to the emitters of the U-, V-, and W-phase lower arm switches SUn, SVn, SWn. Note that a smoothing capacitor 11 is connected to the DC power supply 10 in parallel.
  • the control system includes an angle detection unit 41.
  • the angle detector 41 outputs an angle signal that is a signal corresponding to the rotation angle of the rotor 60.
  • the output signal of the angle detection unit 41 is input to the control device 40.
  • stator 50 and the rotor 60 will be described.
  • Both the stator 50 and the rotor 60 are arranged coaxially with the rotating shaft 32.
  • the direction in which the rotating shaft 32 extends is defined as the axial direction
  • the direction radially extending from the center of the rotating shaft 32 is defined as the radial direction
  • the direction extending circumferentially around the rotating shaft 32 is defined as the circumferential direction. 3 and the like indicate the center of the rotation shaft 32.
  • the stator 50 is made of a laminated steel sheet made of a soft magnetic material, and has an annular stator core 51 and a plurality of teeth 52 projecting radially inward from the stator core 51.
  • the phase windings 31U, 31V, and 31W are distributedly wound or concentratedly wound around the teeth 52.
  • 48 teeth are provided at equal intervals in the circumferential direction.
  • the rotary electric machine 30 has 48 slots.
  • the radially inner distal end portion of the tooth 52 has a shape extending in the circumferential direction.
  • the present invention is not limited to this shape, and the distal end portion of the teeth 52 on the radial inside may not extend in the circumferential direction.
  • FIG. 3 shows one slot pitch, which is the angular interval between circumferentially adjacent slots, by ⁇ .
  • the center line extending in the radial direction of each slot passes through the center O of the rotation shaft 32.
  • the rotor 60 is made of a laminated steel sheet made of a soft magnetic material, and has a cylindrical rotor core 61 and a plurality of main poles 62 projecting radially outward from the rotor core 61.
  • the front end surface of each main pole portion 62 faces the end surface of the tooth 52.
  • eight main pole portions 62 are provided at equal intervals in the circumferential direction.
  • each main pole portion 62 the first winding portion 71a is wound radially outside, and the second winding portion 71b is wound radially inside the first winding portion 71a.
  • the winding directions of the first winding part 71a and the second winding part 71b are the same. Further, among the main pole portions 62 adjacent in the circumferential direction, the winding directions of the winding portions 71a and 71b wound around one side and the winding directions of the winding portions 71a and 71b wound around the other side are opposite. Has become. For this reason, the magnetization directions of the main pole portions 62 adjacent in the circumferential direction are opposite to each other.
  • FIG. 2 shows an electric circuit on the rotor side including the winding portions 71a and 71b wound around the common main pole portion 62.
  • the rotor 60 is provided with a diode 80 and a capacitor 90.
  • the cathode of the diode 80 is connected to the first end of the first winding 71a, and the second end of the first winding 71a is connected to the first end of the second winding 71b.
  • the anode of the diode 80 is connected to the second end of the second winding part 71b.
  • a capacitor 90 is connected in parallel to the second winding part 71b. 2, L1 indicates the inductance of the first winding 71a, L2 indicates the inductance of the second winding 71b, and C indicates the capacitance of the capacitor 90.
  • control device 40 will be described. Note that a part or all of the functions of the control device 40 may be configured as hardware by, for example, one or a plurality of integrated circuits. In addition, each function of the control device 40 may be configured by, for example, software recorded on a non-transitional substantial recording medium and a computer that executes the software.
  • the control device 40 acquires the angle signal of the angle detection unit 41, and generates a drive signal for turning on and off each of the switches SUp to SWn included in the inverter 20 based on the acquired angle signal. More specifically, when driving the rotating electric machine 30 as an electric motor, the control device 40 converts DC power output from the DC power supply 10 into AC power and supplies the AC power to the U, V, and W phase windings 31U, 31V, and 31W. To this end, a drive signal for turning on / off each of the arm switches SUp to SWn is generated, and the generated drive signal is supplied to the gates of each of the arm switches SUp to SWn.
  • control device 40 converts AC power output from U, V, W phase windings 31U, 31V, 31W into DC power and supplies it to DC power supply 10. For this purpose, a drive signal for turning on / off each of the arm switches SUp to SWn is generated.
  • the control device 40 turns on and off the switches SUp to SWn so that the combined current of the fundamental wave current and the harmonic current flows through each of the phase windings 31U, 31V, and 31W.
  • the fundamental wave current is a current mainly for generating torque in the rotating electric machine 30.
  • the harmonic current is a current mainly for exciting the field winding 70 as shown in FIG. 8B.
  • FIG. 8C shows a phase current as a combined current of the fundamental current and the harmonic current.
  • the values on the vertical axis shown in FIG. 8 indicate the relative relationships between the magnitudes of the waveforms shown in FIGS. 8 (a) to 8 (c).
  • the phase currents IU, IV, IW flowing through the phase windings 31U, 31V, 31W are shifted by 120 ° in electrical angle.
  • the envelope of the harmonic current has a cycle of ⁇ of the fundamental current.
  • the envelope is shown by a dashed line in FIG.
  • the timing at which the envelope reaches its peak value deviates from the timing at which the fundamental current reaches its peak value.
  • the timing at which the envelope curve has its peak value is the timing at which the fundamental wave current becomes its fluctuation center (0).
  • the control device 40 controls the amplitude and cycle of each of the fundamental wave current and the harmonic current independently.
  • the maximum value of the phase current flowing through each phase winding 31U, 31V, 31W can be reduced, and the torque of the rotary electric machine 30 can be commanded without increasing the capacity of the inverter 20. Can be achieved.
  • the harmonic current may be the one shown in FIG. FIGS. 10A and 10C correspond to FIGS. 8A and 8C.
  • the timing at which the envelope of the harmonic current has its peak value is the timing at which the fundamental current has its peak value.
  • the harmonic current shown in FIG. 10B is obtained by shifting the phase of the harmonic current shown in FIG. 8B by 1 / of the period of the fundamental current.
  • FIG. 11 shows transition of the phase currents IU, IV, IW flowing through the phase windings 31U, 31V, 31W in this case.
  • a series resonance circuit including the first winding unit 71a, the capacitor 90, and the diode 80 is configured, and a parallel resonance circuit including the second winding unit 71b and the capacitor 90 is configured.
  • the first resonance frequency, which is the resonance frequency of the series resonance circuit, is f1
  • the second resonance frequency, which is the resonance frequency of the parallel resonance circuit is f2.
  • the respective resonance frequencies f1 and f2 are represented by the following equations (eq1) and (eq2).
  • the capacitor 90 is connected in parallel to the second winding 71b. Therefore, as shown in the patterns 2 and 3 in FIG. 12, even when the induced voltages generated in the first and second winding portions 71a and 71b have opposite polarities, the induced current via the capacitor 90 is generated. Flows, the induced currents flowing through the first and second winding portions 71a and 71b are not canceled each other. Therefore, as shown in FIG. 13A, the current induced in the first winding part 71a and the current induced in the second winding part 71b are transferred to the anode side of the diode 80 via the capacitor 90. As shown in FIG. 13B, a current flows from the capacitor 90 to the anode side of the diode 80 via the second winding part 71b. As a result, the field current flowing through the field winding 70 can be increased.
  • the frequency of the harmonic current flowing through the stator winding 31 is set to the same frequency as the first resonance frequency f1 or a frequency near the same. Therefore, the currents induced in the first and second winding portions 71a and 71b can be further increased, and the field current can be further increased.
  • the first resonance frequency f1 and the second resonance frequency f2 may be set to, for example, the same value or substantially the same value.
  • each main pole portion 62 of the rotor 60 has a pair of main extreme portions.
  • a first notch 65a extending in the axial direction is formed in a part of the first main extreme part 64a
  • a second notch 65b extending in the axial direction is formed in a part of the second main extreme part 64b. Is formed.
  • cutouts 65a and 65b are formed by being cut out from ends in the circumferential direction. The cutouts 65a and 65b are cutouts that are opened radially outward (toward the stator) and circumferentially.
  • a plurality of (four) first notches 65a are formed apart from each other in the first main extreme portion 64a.
  • the one located at the end in the axial direction is formed at the end of the first main extreme part 64a in the axial direction.
  • the plurality of (three) second notches 65b are formed so as to be sandwiched between the first notches 65a in the axial direction. Therefore, in the present embodiment, the number of the second notches 65b is one less than the number of the first notches 65a.
  • each first notch 65a is the same when viewed from the axial direction.
  • the outline shape of each second notch 65b is the same when viewed from the axial direction.
  • the outline shape of the first notch 65a and the outline shape of the second notch 65b are line-symmetric with respect to the central axis extending in the radial direction of the main pole portion 62.
  • the rotor 60 is formed by laminating a plurality of plate-shaped field plate portions 63 made of a soft magnetic material.
  • the field plate portion 63 is a member in which a portion serving as the rotor core 61 and a portion serving as the main pole portion 62 are integrally formed.
  • FIG. 5A shows the field plate portion 63 viewed from the first surface
  • FIG. 5B shows the field plate portion 63 viewed from the second surface, which is the back surface of the first surface.
  • the rotor 60 is constituted by one type of field plate portion 63. That is, a plurality of the field plate portions 63 having the first surface directed in the specific direction and the plurality of the field plate portions 63 having the second surface directed in the specific direction are alternately stacked.
  • the rotor 60 is configured.
  • one notch is formed at a radial end portion of a portion to be the main pole portion 62. This notch becomes the first notch 65a in the case shown in FIG. 5A, and becomes the second notch 65b in the case shown in FIG. 5B.
  • the width dimension of the first notch 65a in the circumferential direction is ⁇ nt, “1 / ⁇ ⁇ ⁇ nt ⁇ // 3 ⁇ ⁇ ”.
  • ⁇ nt is a reference line that passes through the edge of the first notch 65a and the center O of the rotating shaft 32 in the surface of the main pole portion 62 facing the stator 50 when the rotor 60 is viewed from the axial direction of the rotating shaft 32. It is the mechanical angle of the notch from.
  • the width dimension ⁇ nt of the second notch 65b in the circumferential direction is set to “1 / ⁇ ⁇ ⁇ nt ⁇ / 3 ⁇ ⁇ ”. This is a setting for reducing the torque ripple of the rotating electric machine 30.
  • the width of each of the first notch 65a and the second notch 65b is ⁇ / 2. This enhances the effect of reducing torque ripple.
  • ⁇ nt may be a value other than ⁇ / 2 in “1 / ⁇ ⁇ ⁇ nt ⁇ 2 / 3 ⁇ ⁇ ”. If ⁇ nt is in the range of ⁇ ⁇ 180 ° / 360 ° ⁇ ⁇ ⁇ 60 ° / 360 °, torque ripple can be reduced.
  • TA and TB in FIG. 14A indicate changes in torque of the rotating electric machine 30.
  • TA indicates a change in torque corresponding to a portion where the first notch 65a is not formed in the first main extreme portion 64a
  • TB indicates a first notch 65a is formed in the first main extreme portion 64a.
  • 5 shows a change in torque corresponding to each portion.
  • “TA + TB” indicates a transition of the total value of the torque TA and the torque TB.
  • any one of the torques TA and TB may have an increased amplitude.
  • FIG. 14B shows an example in which the amplitude of the torque TB is larger than the amplitude of the torque TA. Even in this case, the torque ripple can be reduced.
  • the phases of the torque TA and the torque TB may deviate from ⁇ / 2. Even in this case, if the phase shift is larger than ⁇ / 3 and smaller than 2 ⁇ / 3, the torque ripple can be reduced.
  • a notch is formed in each of a pair of main extreme parts constituting the main pole part 62.
  • the timing of facing the slot in the radial direction can be shifted between the part where the notch is formed and the part where the notch is not formed.
  • the torque ripple of the rotating electric machine 30 can be reduced.
  • the notch is formed in each of the pair of main extreme parts, and the total length in the axial direction of the part where the notch is formed in the main extreme part, and the part where the notch is not formed is formed.
  • the fact that the total length in the axial direction is made equal increases the effect of reducing torque ripple.
  • the portion where the first notch 65a is formed is sandwiched in the axial direction by the portion where the first notch 65a is not formed. Thereby, the torque ripple generated due to the portion where the first notch 65a is formed and the torque ripple generated due to the portion where the first notch 65a is not formed are more appropriately canceled. can do. As a result, the effect of reducing the torque ripple of the rotating electric machine 30 can be enhanced. The same applies to the second main extreme part 64b.
  • the rotating electric machine 30 includes a regulating member 100.
  • the regulating member 100 is a member made of a nonmagnetic material, and prevents the field winding 70 from moving radially outward due to centrifugal force. In FIG. 15, the field winding 70 is also shown.
  • the regulating member 100 is disposed between the main pole portions 62 that are adjacent in the circumferential direction, and extends in the axial direction. As shown in FIG. 16, the regulating member 100 is a long plate-shaped member, and its cross section has an arc shape. Thus, the regulating member 100 does not protrude radially outward from the outer peripheral surface of the rotor 60.
  • the restricting member 100 is provided with a rib 101 extending so as to intersect from the center of the plate surface.
  • a partition 110 made of a soft magnetic material is provided between the first winding 71a and the second winding 71b.
  • the partition 110 has, for example, an annular shape, and the center hole of the partition 110 is inserted into the main pole 62.
  • the partition 110 has a flat shape extending in the circumferential direction when viewed from the axial direction. Since the partition part 110 is interposed between the first winding part 71a and the second winding part 71b, the first winding part 71a and the second winding part 71b are cut off in the radial direction by the partition part 110. ing.
  • the radial thickness of the partition part 110 is smaller than the radial thickness of each of the first winding part 71a and the second winding part 71b.
  • the circumferential length of the partition 110 is, for example, equal to or greater than the circumferential length of each of the winding portions 71a and 71b.
  • the partitioning portion 110 may be formed by laminating soft magnetic materials in the radial direction. Thus, eddy current loss can be reduced. Further, by setting the laminating direction to the radial direction, the radial thickness can be set to be thin according to the thickness of the steel sheet while securing the circumferential length of the partitioning portion 110.
  • FIG. 17 shows a cross-sectional view of the rotor 60 at the portion where the first notch 65a is formed (see the portion Q in FIG. 15), and shows the portion where the second notch 65b is formed (P in FIG. 15).
  • FIG. 18 shows a cross-sectional view of the rotor 60 in FIG.
  • a first groove 110a extending in the axial direction is formed on a circumferential side surface of a portion of the first main extreme portion 64a where the first notch 65a is not formed.
  • a second groove 110b extending in the axial direction is formed on a circumferential side surface of a portion of the second main extreme portion 64b where the second notch 65b is not formed.
  • the first groove 110a and the second groove 110b can be alternately arranged in the axial direction. Therefore, even when the first and second main extreme portions 64a and 64b are notched differently from each other, a configuration for mounting the regulating member 100 can be provided. Accordingly, torque ripple can be reduced in a structure in which the field winding 70 and the regulating member 100 can be assembled to the main pole portion 62 from the radial direction.
  • the form of the notch is not limited to the one shown in FIG. 7 but may be the one shown in FIG.
  • the total length in the axial direction of the portion where the notch is formed is not limited to the configuration in which the total length in the axial direction of the portion where the notch is not formed is not limited to the configuration or the total that is substantially equal.
  • the lengths may be different from each other.
  • a notch may be formed in only one of the first main extreme portion 64a and the second main extreme portion 64b.
  • the contour of the notch may be different in the axial direction.
  • the portion where the first notch 65a is formed and the portion where the second notch 65b is formed do not overlap in the axial direction.
  • the present invention is not limited to this configuration, and the portions where the first and second notches 65a and 65b are formed may be configured to overlap in the axial direction.
  • a field winding 73 as shown in FIG. 20 may be used. Specifically, a first winding part 74a is wound around the main pole part 62, and a second winding part 74b is wound outside the first winding part 74a.
  • the field winding may be constituted by a series connection of three or more windings.
  • FIG. 21 shows an example in which the field winding 70 is configured by a series connection of a first winding part 71a, a second winding part 71b, and a third winding part 71c.
  • Each of the winding portions of the field winding may be formed of a flat wire.
  • the space factor of the field winding can be increased, and the loss can be reduced.
  • the flat wire when a centrifugal force acts on the winding portion, the load applied between the windings can be received on the surface, so that damage to the coating of the winding can be prevented.
  • the ampere turn (AT) can be increased, and the excitation range of the field winding can be expanded. As a result, torque controllability is improved.
  • each of the winding portions may be configured by ⁇ winding using a flat wire.
  • the ⁇ -winding portion using a rectangular wire for example, the winding portion shown in FIG. 5A of JP-A-2008-178211 can be used.
  • the rotating electric machine is not limited to the inner rotor type, and may be an outer rotor type.
  • the main pole portion protrudes radially inward from the rotor core.
  • the rotating electric machine is not limited to a rotating electric machine in which a harmonic current flows through a stator winding to cause a field current to flow through a field winding.
  • the rotating electric machine may be one that causes a field current to flow through a field winding via a brush.
  • the field winding of the rotor is not limited to the aluminum wire, but may be, for example, a copper wire or CNT (carbon nanotube). Further, the field winding may not be formed by compression molding.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2019/034474 2018-09-27 2019-09-02 界磁巻線型回転電機 Ceased WO2020066482A1 (ja)

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