WO2021095353A1 - Machine dynamo-électrique et système de machine dynamo-électrique - Google Patents

Machine dynamo-électrique et système de machine dynamo-électrique Download PDF

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Publication number
WO2021095353A1
WO2021095353A1 PCT/JP2020/035004 JP2020035004W WO2021095353A1 WO 2021095353 A1 WO2021095353 A1 WO 2021095353A1 JP 2020035004 W JP2020035004 W JP 2020035004W WO 2021095353 A1 WO2021095353 A1 WO 2021095353A1
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WIPO (PCT)
Prior art keywords
magnetic
different magnetic
different
electric machine
rotor
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PCT/JP2020/035004
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English (en)
Japanese (ja)
Inventor
孝典 松井
智也 石川
Original Assignee
株式会社ミツバ
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Publication date
Application filed by 株式会社ミツバ filed Critical 株式会社ミツバ
Priority to BR112022009215A priority Critical patent/BR112022009215A2/pt
Publication of WO2021095353A1 publication Critical patent/WO2021095353A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • 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
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors

Definitions

  • the present invention relates to a rotary electric machine and a rotary electric machine system.
  • a rotary electric machine having a rotor having a plurality of magnets for a field magnet, a stator having a coil for generating a rotating magnetic field, and a plurality of sensors for detecting the rotation position of the rotor.
  • the plurality of sensors include a plurality of first sensors and one second sensor.
  • the plurality of first sensors detect a plurality of rotational positions of the rotor in order to control energization of the stator coil when the rotor is rotationally driven.
  • the second sensor detects an absolute predetermined rotational position of the rotor, such as to start an internal combustion engine connected to the rotor.
  • the second sensor detects one magnet (different magnetic magnet) having some different magnetic parts having different magnetic characteristics from the magnet main body among the plurality of magnets of the rotor.
  • the second sensor detects the absolute predetermined rotation position of the rotor by detecting the position of the different magnetic part of the different magnetic magnet.
  • the position accuracy of the magnetic characteristics of the different magnetic portion becomes dull.
  • the position detection accuracy of the second sensor may be lower than the position detection accuracy of the first sensor.
  • an object of the present invention is to provide a rotary electric machine and a rotary electric machine system capable of improving the detection accuracy of the absolute predetermined rotation position of the rotor.
  • the rotary electric machine includes a rotor having a plurality of magnets that alternately arrange different magnetic poles along the rotation direction, a stator that generates a magnetic field that rotates the rotor, and the plurality of magnets.
  • a plurality of magnetic sensors arranged at positions facing the magnets and outputting signals corresponding to the magnetic poles of the plurality of magnets are provided, and the plurality of magnets include a main magnetic part which is a main body and the main magnetic part.
  • a different magnetic magnet having a magnetic characteristic different from the magnetic characteristic of the magnetic portion and having a different magnetic portion arranged at a position deviated from the end face of the main magnetic portion on the rear side in the rotation direction to the front side in the rotation direction.
  • the plurality of magnetic sensors are arranged at positions facing the rotation trajectory of the different magnetic portion of the different magnetic magnet, and correspond to a signal corresponding to the magnetic characteristics of the main magnetic portion and the magnetic characteristics of the different magnetic portion.
  • the first magnetic sensor that outputs a signal is arranged at a position facing the rotating orbit of the main magnetic part and not facing the rotating orbit of the different magnetic part, and a signal corresponding to the magnetic characteristics of the different magnetic part is output. It is characterized by including at least one second magnetic sensor that outputs a signal corresponding to the magnetic characteristics of the main magnetic portion without outputting.
  • the orientation of the magnetic poles of the main magnetic portion and the orientation of the magnetic poles of the different magnetic portion may be opposite to each other.
  • the material of the main magnetic part and the material of the different magnetic part may be different.
  • the rotary electric machine system is the first, after the rotary electric machine according to any one of the above and the first magnetic sensor start to output a signal according to the magnetic characteristics of the different magnetic portion.
  • the timing at which the output of the signal corresponding to the magnetic characteristics of the different magnetic portion from the magnetic sensor 1 ends is set as the detection preparation start timing, and after the detection preparation start timing is detected, the first magnetic sensor is adjacent in the rotation direction.
  • An absolute position detection timing is defined as the timing at which a signal corresponding to the switching of the magnetic poles between the matching magnets is output, and a control device that acquires an absolute predetermined rotation position of the rotor according to the absolute position detection timing. It is characterized by having.
  • a different magnetic magnet having a different magnetic portion arranged at a position deviated from the end face of the main magnetic portion on the rear side in the rotation direction to the front side in the rotation direction, and a main magnetism.
  • FIG. 3 is a perspective view of a stator of a rotary electric machine according to an embodiment of the present invention. The figure which developed the inner peripheral side of the rotor of the rotary electric machine in embodiment of this invention.
  • FIG. 1 is a perspective view of the rotary electric machine 1 and the rotary electric machine system 100.
  • FIG. 2 is a plan view of the rotary electric machine 1 with the rotor 4 removed, as viewed from the rotation axis direction Z.
  • FIG. 3 is a side surface of the rotor 4 of the rotary electric machine 1 seen from a direction orthogonal to the rotation axis direction Z by breaking the rotor 4 in a plane parallel to the rotation axis direction Z.
  • the rotation axis direction Z is a direction parallel to the rotation axis of the rotary electric machine 1.
  • the rotary electric machine 1 and the rotary electric machine system 100 of the embodiment are mounted on a vehicle such as a motorcycle, and start an internal combustion engine (not shown) of the vehicle and generate electric power by the power of the internal combustion engine.
  • the rotary electric machine 1 is a three-phase brushless type and outer rotor type rotary electric machine.
  • the rotary electric machine system 100 includes a rotary electric machine 1 and a control device 101.
  • the rotary electric machine 1 includes a stator 2, a rotor 4, and a position detection sensor unit 6.
  • the stator 2 is fixed to, for example, a crankcase (not shown) of an internal combustion engine.
  • the rotor 4 is fixed to, for example, a crankshaft (not shown) of an internal combustion engine.
  • the position detection sensor unit 6 detects the rotational position of the rotor 4.
  • the inside of the rotation axis direction Z in the axial direction is the side on which the crankshaft (not shown) extends, and the side on which the rotor 4 is fixed to the crankshaft. ..
  • the outside in the axial direction is the side opposite to the inside in the axial direction.
  • FIG. 4 is a perspective view of the stator 2.
  • the stator 2 includes a stator core 2A and a plurality of coils 10.
  • the stator core 2A is formed of, for example, laminated electromagnetic steel sheets.
  • the stator core 2A includes a main body portion 2a and a plurality of tooth portions 2b.
  • the outer shape of the main body 2a is, for example, an annular shape.
  • the plurality of tooth portions 2b project radially outward from the outer peripheral surface of the main body portion 2a.
  • Each tooth portion 2b includes a claw piece 3 projecting from the tip portion in the protruding direction to both sides in the circumferential direction.
  • the outer shape of the nail piece 3 is, for example, T-shaped.
  • the plurality of teeth portions 2b are 18 teeth portions 2b in the case of a rotary electric machine 1 having 12 poles and 18 slots, for example.
  • One or two notches 7 are formed in the claw pieces 3 of some of the teeth portions 2b among the plurality of teeth portions 2b.
  • the notch portion 7 is formed so that, for example, a portion of the end portion of the nail piece 3 in the circumferential direction from the central portion in the rotation axis direction Z to the outer end in the axial direction is notched.
  • the notch portions 7 forming a pair so as to be adjacent to each other in the circumferential direction with respect to some of the tooth portions 2b adjacent to each other in the circumferential direction have a rectangular shape straddling two claw pieces 3 adjacent to each other in the circumferential direction.
  • the groove 8 is formed.
  • the three pairs of notches 7 formed so as to be continuously arranged in the circumferential direction form three groove portions 8 so as to be continuously arranged in the circumferential direction.
  • the first leg 61a, the second leg 61b, and the third leg 61c of the position detection sensor unit 6, which will be described later, are arranged in the three grooves 8 formed by the three pairs of notches 7.
  • the plurality of coils 10 are mounted so as to be wound around the plurality of teeth portions 2b via an insulator (not shown). As shown in FIGS. 1 and 2, the terminal portions of the plurality of coils 10 are connected to the first ends of the plurality of lead wires 21a.
  • the plurality of lead wires 21a are, for example, three lead wires 21a associated with the three-phase U phase, V phase, and W phase.
  • the plurality of lead wires 21a are bundled by the protective tube 22a and arranged in an arc shape along the circumferential direction of the stator 2 at the axially outer end of the stator 2.
  • the second ends of the plurality of lead wires 21a are drawn out of the crankcase via a grommet 23 provided in the crankcase (not shown) of the internal combustion engine, and are connected to the control device 101.
  • the plurality of coils 10 are 18 coils 10 in the case of a rotary electric machine 1 having 12 poles and 18 slots, for example.
  • a plurality of sensor wires 21b drawn from the sensor case 30, which will be described later, are bundled by a protective tube 22b and routed in an arc shape along the circumferential direction of the stator 2. ..
  • the plurality of sensor lines 21b are connected to the first to fourth holes ICs 38a, 38b, 38c, 38d in the internal space of the sensor case 30, which will be described later.
  • the plurality of sensor wires 21b are drawn out of the crankcase via a grommet 24 provided in the crankcase (not shown) of the internal combustion engine, and are connected to the control device 101.
  • a plurality of lead wires 21a and sensor wires 21b arranged at the axially outer ends of the stator 2 are held at the axially outer ends of the stator core 2A via clips 25.
  • FIG. 5 is a view showing the inner peripheral side of the rotor 4 developed.
  • FIG. 6 is a diagram showing an example of time change of signals output from the first to fourth hall ICs 38a, 38b, 38c, 38d when the rotor 4 is rotated by the rotary electric machine 1 having 12 poles and 18 slots.
  • FIG. 7 is a diagram showing an example of a time change of a signal output from the first hole IC 38a around the different magnetic magnet 16c when the rotor 4 is rotated.
  • the rotor 4 includes a rotor yoke 12 and a boss portion 14.
  • the outer shape of the rotor yoke 12 is, for example, a bottomed cylinder.
  • the rotor yoke 12 is made of a magnetic material.
  • the boss portion 14 is coaxially fixed to the bottom wall 12a of the rotor yoke 12.
  • the boss portion 14 is connected to the crankshaft of the internal combustion engine and rotates integrally with the crankshaft.
  • the rotor 4 includes a plurality of magnets 16 attached to the inner peripheral surface of the rotor yoke 12.
  • the plurality of magnets 16 are arranged at equal intervals along the circumferential direction of the rotor yoke 12.
  • the outer shape of each magnet 16 is, for example, a plate-shaped segment type or a rectangular plate-shaped square shape curved along the circumferential direction of the rotor yoke 12. At least a part of each magnet 16 such as a segment type or a square type in the thickness direction is parallel to the radial direction of the rotor yoke 12.
  • the magnetization direction of each magnet 16 is parallel to the thickness direction.
  • the magnetizing directions of the magnets 16 adjacent to each other in the circumferential direction are reversed. That is, the directions of the magnetic poles of the two magnets 16 adjacent to each other in the circumferential direction are opposite to each other.
  • a magnet 16 having an N pole on the inner peripheral side of the rotor 4 and an S pole on the outer peripheral side is an N pole magnet 16a
  • a magnet 16 having an S pole on the inner peripheral side of the rotor 4 and an N pole on the outer peripheral side is used.
  • the S-pole magnet 16b is used, the plurality of N-pole magnets 16a and the S-pole magnets 16b are alternately arranged in the circumferential direction.
  • the plurality of magnets 16 are, for example, 12 magnets 16 in the case of a rotary electric machine 1 having 12 poles and 18 slots.
  • a predetermined one of the plurality of magnets 16 is a different magnetic magnet 16c provided with a main magnetic part 18 and a different magnetic part 19 so that some magnetic characteristics are different from those of the main part.
  • the different magnetic portion 19 has a magnetic characteristic different from the magnetic characteristic of the main magnetic portion 18 by having a magnetization direction opposite to the magnetization direction of the main magnetic portion 18 or being formed of a material different from the material of the main magnetic portion 18. ..
  • the different magnetic magnet 16c includes a main magnetic portion 18 and a different magnetic portion 19 having different magnetization directions from each other.
  • the different magnetic magnet 16c is adjacent to the N-pole magnet 16a on both sides in the circumferential direction.
  • the inner peripheral side of the rotor 4 is magnetized to the S pole and the outer peripheral side is magnetized to the N pole as in the S pole magnet 16b, whereas in the different magnetic portion 19, the inner peripheral side of the rotor 4 is N.
  • the pole and the outer peripheral side are magnetized to the S pole.
  • the different magnetic magnets 16c are arranged between a specific set of N-pole magnets 16a and 16a arranged in the circumferential direction, and between the N-pole magnets 16a and 16a arranged in other combinations in the circumferential direction.
  • the S pole magnet 16b is arranged in the.
  • the different magnetic portion 19 of the different magnetic magnet 16c is provided at the end of the inner peripheral side of the inner peripheral side and the outer peripheral side of the different magnetic magnet 16c in the thickness direction.
  • the different magnetic portion 19 is exposed from the end surface (inner peripheral surface) 16A on the inner peripheral side of the different magnetic magnet 16c to the inner peripheral side.
  • the different magnetic portion 19 is the rotation direction RD from the end surface (rear side end surface) 16B of the different magnetic magnet 16c on the rear side of the front side and the rear side of the rotation direction of the rotor 4 (that is, the rotation direction of the plurality of magnets 16). It is provided separately on the front side of the.
  • the rear side end surface 16B of the different magnetic magnet 16c is the same as the end surface (rear side end surface) 18A of the main magnetic portion 18 on the rear side in the rotation direction RD.
  • the rear side end surface 19A of the different magnetic portion 19 is separated from the rear side end surface 16B of the different magnetic magnet 16c and the rear side end surface 18A of the main magnetic portion 18 toward the front side in the rotation direction RD.
  • the different magnetic portion 19 is an end portion of the different magnetic magnet 16c on the front side in the rotation direction RD, and an end portion of the different magnetic magnet 16c on the axial outer side of the axial inner side and the axial outer side in the rotation axial direction Z. It is provided in.
  • the different magnetic portion 19 includes an end face (front end face) 16C of the different magnetic magnet 16c on the front side in the rotation direction RD and an end face (axial outer end face) 16D of the different magnetic magnet 16c on the axially outer side in the rotation axis direction Z. It is exposed from each of the.
  • the north pole and the south pole alternate in the circumferential direction except for the axial outside in the rotation axis direction Z. They are arranged side by side.
  • the magnetic poles are the same for the different magnetic portion 19 of the different magnetic magnet 16c and one magnet 16 (for example, N pole magnet 16a) continuously arranged on the different magnetic magnet 16c on the front side in the rotation direction RD. (For example, N poles) are arranged continuously.
  • the inner peripheral side and axially outer regions of the plurality of magnets 16 are regions for defining the ignition timing of the internal combustion engine associated with the absolute predetermined rotation position of the rotor 4.
  • the regions other than the inner peripheral side and the outer side in the axial direction of the plurality of magnets 16 are mainly regions for detecting that define the commutation timing of energization of the coil 10.
  • the position detection sensor unit 6 includes a sensor case 30 and first to fourth halls ICs 38a, 38b, 38c, 38d.
  • the sensor case 30 is arranged outside the stator core 2A in the axial direction.
  • the sensor case 30 is made of a resin material.
  • the sensor case 30 accommodates a plurality of circuit boards (not shown) on which the first to fourth holes ICs 38a, 38b, 38c, and 38d are mounted.
  • the sensor case 30 includes an outer frame member 60 and first to third legs 61a, 61b, 61c.
  • the outer shape of the outer frame member 60 is, for example, a bottomed cylinder curved along the outer circumference of the stator core 2A.
  • the outer frame member 60 includes a wiring guide 68 integrally provided so as to extend inward in the radial direction.
  • the wiring guide 68 bundles a plurality of sensor wires 21b drawn from the outer frame member 60.
  • the wiring guide 68 includes a bolt seat 69 inside in the radial direction.
  • the wiring guide 68 is fixed to the stator core 2A by fastening with a bolt 71 inserted into a bolt hole (not shown) formed in the bolt seat 69.
  • the outer frame member 60 includes a tongue piece portion 73 that projects outward in the radial direction.
  • the outer frame member 60 is fixed to the crankcase (not shown) of the internal combustion engine by fastening with bolts (not shown) inserted into the bolt holes 73a formed in the tongue piece portion 73.
  • the first to third legs 61a, 61b, 61c are integrally provided so as to project inward in the axial direction from the outer frame member 60.
  • the outer shape of each leg portion 61a, 61b, 61c is, for example, a bottomed square cylinder.
  • the first to third leg portions 61a, 61b, 61c are inserted into the three groove portions 8 formed by the three pairs of notch portions 7 of the stator 2.
  • the radial outer surfaces of the first to third legs 61a, 61b, 61c are arranged flush with each other with respect to the radial outer surface of the claw piece 3 of the stator 2.
  • the first to third legs 61a, 61b, 61c are sequentially arranged along the circumferential direction from the rear side to the front side of the rotation direction RD of the rotor 4.
  • a circuit board (not shown) on which the first hole IC38a and the second hole IC38b are mounted is housed in the internal space of the first leg portion 61a.
  • the first hole IC 38a and the second hole IC 38b are arranged along the rotation axis direction Z.
  • the first hole IC 38a is arranged axially outside the second hole IC 38b.
  • a circuit board (not shown) on which the third hole IC 38c is mounted is housed in the internal space of the second leg portion 61b.
  • a circuit board (not shown) on which the fourth hall IC38d is mounted is housed in the internal space of the third leg portion 61c.
  • the third hole IC 38c and the fourth hole IC 38d are arranged at the same positions as the second hole IC 38b in the rotation axis direction Z.
  • the first hole IC38a and the second hole IC38b, the third hole IC38c, and the fourth hole IC38d are arranged at intervals of an electric angle of 120 ° in the circumferential direction.
  • each hole IC 38a, 38b, 38c, 38d is arranged so as to face each magnet 16 of the rotor 4.
  • the first hole IC 38a is arranged at the first position M1 in the rotation axis direction Z facing the different magnetic portion 19 of the different magnetic magnet 16c in the radial direction.
  • the first position M1 in the rotation axis direction Z is a position that faces a part of the rotation trajectory of the different magnetic portion 19 accompanying the rotation of the rotor 4 in the radial direction.
  • the second to fourth holes ICs 38b, 38c, 38d are arranged at the second position M2 in the rotation axis direction Z which does not face the different magnetic portion 19 of the different magnetic magnet 16c in the radial direction.
  • the second position M2 in the rotation axis direction Z faces, for example, each part of the rotation trajectory of the central portion of each magnet 16 and the rotation trajectory of the main magnetic portion 18 of the different magnetic magnet 16c in the radial direction as the rotor 4 rotates.
  • the position
  • the first to fourth halls ICs 38a, 38b, 38c, 38d are connected to a plurality of sensor wires 21b via a plurality of circuit boards (not shown) in the internal space of the sensor case 30.
  • the internal space of the sensor case 30 accommodating a plurality of circuit boards (not shown) on which the first to fourth holes ICs 38a, 38b, 38c, and 38d are mounted is filled.
  • the agent 90 is filled. The filler 90 seals the internal space of the sensor case 30.
  • each of the first to fourth hole ICs 38a, 38b, 38c, 38d is "1” or “0” depending on the magnetic poles of the parts of the magnets 16 facing each other in the radial direction. Output the signal of.
  • each hole IC 38a, 38b, 38c, 38d outputs a signal of "1" when facing the N-pole portion in the radial direction, and "0" when facing the S-pole portion in the radial direction. Output a signal.
  • the first hole IC 38a outputs the first signal P corresponding to the magnetic poles of all the magnets 16 including the main magnetic portion 18 and the different magnetic portion 19 of the different magnetic magnet 16c.
  • the second to fourth hole ICs 38b, 38c, 38d are sequentially associated with the three phases of U phase, V phase, and W phase, and among all the magnets 16, parts other than the different magnetic portion 19 of the different magnetic magnet 16c.
  • the second signal U, the third signal V, and the fourth signal W are output according to the magnetic poles of. Since the first hole IC 38a and the second hole IC 38b are arranged along the rotation axis direction Z, the first signal P output from the first hole IC 38a and the second hole IC 38b output from the second hole IC 38b are output.
  • the 2 signal U is the same for all magnets 16 except for the different magnetic portion 19 of the different magnetic magnet 16c.
  • the control device 101 is a software function unit that functions by executing a predetermined program by a processor such as a CPU (Central Processing Unit), for example.
  • the software function unit is an ECU (Electronic Control Unit) including a processor such as a CPU, a ROM (Read Only Memory) for storing a program, a RAM (Random Access Memory) for temporarily storing data, and an electronic circuit such as a timer. ..
  • At least a part of the control device 101 may be an integrated circuit such as an LSI (Large Scale Integration).
  • the control device 101 controls the rotation of the rotor 4 based on the signals P, U, V, and W output from the first to fourth hall ICs 38a, 38b, 38c, and 38d.
  • the control device 101 receives each signal P, U, V, W as a rotation position signal for grasping the rotation position of the rotor 4.
  • the control device 101 controls the commutation timing of the three-phase coil 10 with respect to energization by the second signal U, the third signal V, and the fourth signal W output from the second to fourth hall ICs 38b, 38c, and 38d. ..
  • the control device 101 is ignited at the start of the internal combustion engine by the first signal P, the second signal U, the third signal V, and the fourth signal W output from the first to fourth hall ICs 38a, 38b, 38c, 38d. Control timing and fuel injection timing.
  • control device 101 is cranked by a signal group S (P, U, V, W) formed by a combination of the first signal P, the second signal U, the third signal V, and the fourth signal W when the rotor 4 is rotationally driven.
  • the absolute predetermined rotation position of the rotor 4 associated with the predetermined state of the shaft or the predetermined position (for example, top dead center) of the piston (not shown) connected to the crankshaft is grasped.
  • the first hole IC 38a has the different magnetic portion 19.
  • the first signal P of the first hall IC38a and the second signal U of the second hall IC38b coincide with each other.
  • the first signal P of the first hole IC 38a and the second signal U of the second hole IC 38b are different. Thereby, the timing at which the first hole IC 38a faces the different magnetic portion 19 can be detected.
  • the control device 101 sets the detection preparation start timing PD0 as the timing at which the detection of the different magnetic portion 19 of the different magnetic magnet 16c is started by the first hole IC 38a and then the detection of the different magnetic portion 19 is completed.
  • the control device 101 sets the timing at which the first hole IC 38a detects the switching of the magnetic poles between the magnets 16 adjacent to each other in the circumferential direction after the detection preparation start timing PD0 is detected as the absolute position detection timing PD. ..
  • the control device 101 sets the ignition timing and the fuel injection timing of the internal combustion engine according to the absolute position detection timing PD when the internal combustion engine is started.
  • the control device 101 is caused by the switching of the magnetic poles between the magnets 16 adjacent to each other in the circumferential direction after the detection of the detection preparation start timing PD0 caused by the different magnetic portion 19 of the different magnetic magnet 16c.
  • Absolute position detection timing PD is detected.
  • the rotor 4 is rotated in an absolute predetermined manner. The position can be grasped with high accuracy.
  • the different magnetic portion 19 of the different magnetic magnet 16c is formed by later magnetizing a part of the main magnetic portion 18 that has already been magnetized, whereby the magnetism of the different magnetic portion 19 is formed. Even when the position accuracy of the characteristic decreases and the error dPD0 of the detection preparation start timing PD0 increases, the absolute position detection timing PD can be detected accurately with a smaller error.
  • the control device 101 charges a battery (not shown) with the generated power generated by the rotation of the rotor 4 or directly various devices (not shown). ).
  • the control device 101 controls the energization switching timing of the inverter (not shown) connected to the rotary electric machine 1 according to the combination of the second signal U, the third signal V, and the fourth signal W. Charge the battery connected to the inverter.
  • FIG. 8 is a diagram showing an example of a time change of a signal output from the first hall IC 38a around the different magnetic magnet 16d when the rotor 4A of the rotary electric machine 1A in the comparative example of the embodiment is rotated.
  • the difference between the rotary electric machine 1A in the comparative example and the rotary electric machine 1 in the embodiment is the position of the different magnetic portion 19 in one predetermined magnet 16.
  • the rotary electric machine 1A in the comparative example includes a rotor 4A having a different magnetic magnet 16d instead of the rotor 4 having the different magnetic magnet 16c of the rotary electric machine 1 in the embodiment.
  • the different magnetic magnet 16d of the comparative example is from the end face (front side end face) 16C of the different magnetic magnet 16d on the front side of the front side and the rear side of the rotation direction of the rotor 4A (that is, the rotation direction of the plurality of magnets 16) RD.
  • a different magnetic portion 19 is provided on the rear side in the rotation direction RD.
  • the front end surface 16C of the different magnetic magnet 16d of the comparative example is the same as the end surface (front end surface) 18B of the main magnetic portion 18 on the front side in the rotation direction RD.
  • the front end surface 19B of the different magnetic portion 19 is separated from, for example, the front end surface 18B of the main magnetic portion 18 to the rear side in the rotation direction RD.
  • the rear side end surface 19A of the different magnetic portion 19 is flush with the rear side end surface 16E of the different magnetic magnet 16d.
  • the same magnetic pole is detected by the first hole IC 38a in the different magnetic portion 19 of the different magnetic magnet 16d and the magnet 16 adjacent to the different magnetic magnet 16d on the rear side in the rotation direction RD.
  • the absolute position detection timing PD is detected by switching the magnetic poles on the front end surface 19B of the different magnetic portion 19 on the front side in the rotation direction RD.
  • the different magnetic part 19 of the different magnetic magnet 16d is a part of the main magnetic part 18 that has already been magnetized. Since it is formed by being magnetized later, the position accuracy of the magnetic characteristics of the different magnetic portion 19 may decrease, and the error dPD of the absolute position detection timing PD may increase.
  • the absolute position is detected by the boundary of another magnet 16 other than the different magnetic magnet 16c having higher position accuracy of magnetic characteristics. Since the timing PD is detected, the absolute predetermined rotation position of the rotor 4 can be detected more accurately.
  • the different magnetic portion 19 of the different magnetic magnet 16c is the end face (rear side end face) of the different magnetic magnet 16c and the main magnetic portion 18 on the rear side in the rotation direction RD.
  • 16B, 18A are provided apart from the front side in the rotation direction RD.
  • the first hole IC 38a that outputs the first signal P corresponding to each of the main magnetic portion 18 and the different magnetic portion 19 first responds to the stop of the detection of the different magnetic portion 19 after the detection of the different magnetic portion 19. Outputs one signal P.
  • the first hole IC 38a outputs the first signal P corresponding to the switching of the magnetic poles between the magnets 16 adjacent to each other in the rotation direction RD after the detection of the different magnetic portion 19 is stopped.
  • the first signal P corresponding to the switching of the magnetic poles between the magnets 16 having higher position accuracy than the first signal P corresponding to the different magnetic portion 19 is associated with the different magnetic portion 19. It can be obtained as information for grasping the absolute predetermined rotation position of the rotor 4, and the position detection accuracy of the rotor 4 can be improved.
  • the absolute predetermined rotation position of the rotor 4 can be detected more accurately. Thereby, based on the predetermined state of the crankshaft or the absolute predetermined rotation position of the rotor 4 associated with the predetermined position (for example, top dead center) of the piston (not shown) connected to the crankshaft. , The ignition timing and fuel injection timing of the internal combustion engine can be set accurately.
  • the different magnetic portion 19 of the different magnetic magnet 16c is an end portion of the different magnetic magnet 16c on the front side in the rotation direction RD and an end portion of the different magnetic magnet 16c on the outer side in the axial direction of the rotation axis direction Z.
  • the different magnetic portion 19 may be arranged at a position away from both end faces (rear side end face 16B and front side end face 16F) of the different magnetic magnet 16c in the rotation direction RD.
  • the different magnetic portion 19 may be arranged at an appropriate position in the rotation axis direction Z.
  • An appropriate position in the rotation axis direction Z is a position that faces the first hole IC 38a in the radial direction.
  • FIG. 9 is a diagram showing an example of a time change of a signal output from the first hall IC 38a around the different magnetic magnet 16e when the rotor 4B of the rotary electric machine 1B in the first modification of the embodiment is rotated.
  • the difference between the rotary electric machine 1B of the first modification and the rotary electric machine 1 of the embodiment is the position of the different magnetic portion 19 in one predetermined magnet 16.
  • the rotary electric machine 1B in the first modification includes a rotor 4B having a different magnetic magnet 16e instead of the rotor 4 having the different magnetic magnet 16c of the rotary electric machine 1 in the embodiment.
  • the different magnetic magnets 16e of the first modification are provided apart from the front end surface 16C in the rotation direction of the rotor 4B (that is, the rotation directions of the plurality of magnets 16) and from the rear end surface 16B to the front side.
  • a different magnetic portion 19 is provided.
  • the rear end surface 16B of the different magnetic magnet 16e and the rear end surface 18A of the main magnetic portion 18 are the same, and the front end surface 16C of the different magnetic magnet 16e and the front end surface 18B of the main magnetic portion 18 are the same.
  • the rear side end surface 19A of the different magnetic portion 19 is separated from the rear side end surface 16B of the different magnetic magnet 16e and the rear side end surface 18A of the main magnetic portion 18 toward the front side in the rotation direction RD.
  • the control device 101 detects the magnetic poles between the magnets 16 adjacent to each other in the circumferential direction after the detection preparation start timing PD0 caused by the different magnetic portion 19 of the different magnetic magnet 16e is detected.
  • Absolute position detection timing PD due to switching is detected.
  • the first hole IC38a and the second hole IC38b are arranged along the rotation axis direction Z in the internal space of the first leg portion 61a, but the present invention is not limited to this.
  • the first hole IC38a is arranged in the internal space of the fourth leg different from the first to third legs 61a, 61b, 61c, so that the circumference of the first hole IC38a is different from that of the second hole IC38b. It may be arranged so as to be offset in the direction.
  • FIG. 10 is a view showing the inner peripheral side of the rotor 4 in the second modification.
  • FIG. 11 shows an example of time change of signals output from the first to fourth hall ICs 38a, 38b, 38c, 38d when the rotor 4 is rotated in the 12-pole 18-slot rotary electric machine 1C of the second modification. It is a figure.
  • the first hole IC38a, the second hole IC38b, the third hole IC38c, and the fourth hole IC38d are from the rear side to the front side in the rotation direction RD of the rotor 4. , Are arranged at intervals of 120 ° in the circumferential direction.
  • the first hole IC 38a and the fourth hole IC 38d are arranged at intervals of an electric angle of 360 °, the first signal P output from the first hole IC 38a and the first signal P output from the fourth hole IC 38d are output.
  • the 4 signal W is the same for all magnets 16 except for the different magnetic portion 19 of the different magnetic magnet 16c.
  • the first hole IC 38a and the fourth hole IC 38d are arranged at an interval of an electric angle of 360 °, in the region where the first hole IC 38a does not detect the different magnetic portion 19, the first hole IC 38a is the first hole IC 38a.
  • the 1st signal P and the 4th signal W of the 4th hall IC38d match.
  • the first signal P of the first hole IC 38a and the fourth signal W of the fourth hole IC 38d are different. Thereby, the timing at which the first hole IC 38a faces the different magnetic portion 19 can be detected.
  • the control device 101 sets the detection preparation start timing PD0 as the timing at which the detection of the different magnetic portion 19 of the different magnetic magnet 16c is started by the first hole IC 38a and then the detection of the different magnetic portion 19 is completed.
  • the control device 101 sets the timing at which the first hole IC 38a detects the switching of the magnetic poles between the magnets 16 adjacent to each other in the circumferential direction after the detection preparation start timing PD0 is detected as the absolute position detection timing PD. ..
  • the control device 101 sets the ignition timing and the fuel injection timing of the internal combustion engine according to the absolute position detection timing PD when the internal combustion engine is started.
  • the control device 101 detects the magnetic poles between the magnets 16 adjacent to each other in the circumferential direction after the detection preparation start timing PD0 caused by the different magnetic portion 19 of the different magnetic magnet 16c is detected.
  • Absolute position detection timing PD due to switching is detected.
  • the rotary electric machine 1 has 12 poles and 18 slots, but the present invention is not limited to this.
  • the rotary electric machine 1 may have another number of poles and slots such as 14 poles and 12 slots.
  • FIG. 12 is a view showing the inner peripheral side of the rotor 4D in the third modified example developed.
  • FIG. 13 is a diagram showing an example of time change of signals output from the first to fourth hall ICs 38a, 38b, 38c, 38d when the rotor 4D is rotated by the 14-pole rotary electric machine 1D of the third modification. is there.
  • the control device 101 starts the detection preparation for the timing at which the detection of the different magnetic portion 19 of the different magnetic magnet 16c is started after the detection of the different magnetic portion 19 of the different magnetic magnet 16c is started by the first hole IC 38a.
  • the timing is PD0.
  • the control device 101 sets the timing at which the first hole IC 38a detects the switching of the magnetic poles between the magnets 16 adjacent to each other in the circumferential direction after the detection preparation start timing PD0 is detected as the absolute position detection timing PD. ..
  • the control device 101 sets the ignition timing and the fuel injection timing of the internal combustion engine according to the absolute position detection timing PD when the internal combustion engine is started.
  • the control device 101 detects the magnetic poles between the magnets 16 adjacent to each other in the circumferential direction after the detection preparation start timing PD0 caused by the different magnetic portion 19 of the different magnetic magnet 16c is detected.
  • Absolute position detection timing PD due to switching is detected.
  • the second hole IC38b, the third hole IC38c, and the fourth hole IC38d are arranged at intervals of 120 ° in the circumferential direction, but the present invention is limited to this. Not done. For example, they may be arranged at intervals of 60 ° in the circumferential direction.
  • the control device 101 may be the third signal V and the fourth signal W by, for example, inverting the signals output from the third hall IC 38c and the fourth hall IC 38d.
  • the second to fourth hole ICs 38b, 38c, 38d are arranged at the second position M2 in the rotation axis direction Z, but the present invention is not limited to this, and different positions in the rotation axis direction Z. May be placed in.
  • the hall ICs 38a, 38b, 38c, and 38d are provided, but the present invention is not limited to this, and other magnetic sensors may be provided.
  • the rotary electric machine 1 is a starting generator of an internal combustion engine for a vehicle such as a motorcycle, but the present invention is not limited to this, and may be applied to various uses.
  • the rotary electric machine 1 may be simply a generator or simply an electric motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Brushless Motors (AREA)

Abstract

L'invention concerne une machine dynamo-électrique et un système de machine dynamo-électrique qui permettent d'améliorer la précision de détection de la position de rotation prescrite absolue d'un rotor. Cette machine dynamo-électrique 1 comprend un rotor 4 et des premier à quatrième circuits intégrés à effet Hall, 38a, 38b, 38c, 38d. Le rotor 4 comprend une pluralité d'aimants 16 pour lesquels différents pôles magnétiques sont alignés en alternance le long d'une direction de rotation RD. Chaque circuit intégré à effet Hall 38a, 38b, 38c, 38d fait face à la pluralité d'aimants 16 et délivre un signal en fonction du pôle magnétique de chaque aimant 16. Un aimant ayant un magnétisme différent prescrit 16c possède une partie magnétique principale 18 et une partie magnétique différente 19 qui a des caractéristiques magnétiques différentes de la partie magnétique principale 18 et est déplacée entre la surface d'extrémité côté arrière de la partie magnétique principale 18 et le côté avant dans la direction de rotation RD. Le premier circuit intégré à effet Hall 38a délivre un signal qui correspond à la partie magnétique principale 18 et à la partie magnétique différente 19. Chaque circuit intégré à effet Hall 38b, 38c, 38d délivre un signal qui correspond à la partie magnétique principale 18 sans délivrer de signal qui correspond à la partie magnétique différente 19.
PCT/JP2020/035004 2019-11-14 2020-09-16 Machine dynamo-électrique et système de machine dynamo-électrique WO2021095353A1 (fr)

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BR112022009215A BR112022009215A2 (pt) 2019-11-14 2020-09-16 Máquina dínamo-elétrica e sistema de máquina dínamo-elétrica

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JP2019206109A JP7353930B2 (ja) 2019-11-14 2019-11-14 回転電機システム
JP2019-206109 2019-11-14

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WO2021095353A1 true WO2021095353A1 (fr) 2021-05-20

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61195776U (fr) * 1985-05-20 1986-12-06
JP2011030314A (ja) * 2009-07-23 2011-02-10 Panasonic Corp リング磁石、それを備えたモータおよび電気機器、並びにリング磁石の形成方法
JP2013102667A (ja) * 2011-06-06 2013-05-23 Denso Corp 内燃機関制御用信号出力機能付き回転機、及び内燃機関制御用信号出力機能付き始動モータ
WO2017122670A1 (fr) * 2016-01-12 2017-07-20 株式会社ミツバ Machine tournante électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61195776U (fr) * 1985-05-20 1986-12-06
JP2011030314A (ja) * 2009-07-23 2011-02-10 Panasonic Corp リング磁石、それを備えたモータおよび電気機器、並びにリング磁石の形成方法
JP2013102667A (ja) * 2011-06-06 2013-05-23 Denso Corp 内燃機関制御用信号出力機能付き回転機、及び内燃機関制御用信号出力機能付き始動モータ
WO2017122670A1 (fr) * 2016-01-12 2017-07-20 株式会社ミツバ Machine tournante électrique

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JP2021083149A (ja) 2021-05-27
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