WO2022113405A1 - 回転電機、並びにそれを用いる電動車両用回転電機システム - Google Patents
回転電機、並びにそれを用いる電動車両用回転電機システム Download PDFInfo
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- WO2022113405A1 WO2022113405A1 PCT/JP2021/021699 JP2021021699W WO2022113405A1 WO 2022113405 A1 WO2022113405 A1 WO 2022113405A1 JP 2021021699 W JP2021021699 W JP 2021021699W WO 2022113405 A1 WO2022113405 A1 WO 2022113405A1
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- rotary electric
- electric machine
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- system winding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/46—Series type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
- B60L7/14—Dynamic electric regenerative braking for vehicles propelled by ac motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L9/00—Electric propulsion with power supply external to the vehicle
- B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
- B60L9/18—Electric propulsion with power supply external to the vehicle using ac induction motors fed from dc supply lines
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Definitions
- the present invention relates to a rotary electric machine having a plurality of output systems, and a rotary electric machine system for an electric vehicle using the rotary electric machine.
- a rotary electric machine system for power supply in an electric vehicle such as a dump truck
- a rotary electric machine having two windings is applied instead of the main generator and the auxiliary generator in order to reduce the size and weight of the system. It is conceivable to do.
- one winding is for the power supply of the traction motor that drives the vehicle body
- the other winding is for the power supply of peripheral equipment such as a cooling device. It is necessary to provide the winding of.
- Patent Document 1 The technique described in Patent Document 1 is known as a conventional technique relating to a rotary electric machine having two winding systems having different configurations.
- the three-phase AC winding is connected in Y, and the magnitude of the voltage is greater than the induced voltage of the U-phase winding.
- an intermediate tap is provided in the U-phase winding, and the other end of the single-phase AC winding and the intermediate tap are used as the output of the single-phase AC.
- the present invention uses a rotary electric machine capable of improving efficiency without complicating the winding configuration while having two systems of three-phase AC windings having different configurations, and this rotary electric machine.
- a rotary electric system for electric vehicles is provided.
- the rotary electric machine includes a rotor and a stator having a three-phase AC winding, and the three-phase AC windings are independent of each other.
- a first slot comprising a single system winding and a second system winding, comprising a plurality of first slots in which the first system winding is located and a plurality of second slots in which the second system winding is located.
- the number of slots is equal to or greater than the number of slots in the second slot, and the first system winding is located on the inner diameter side of the second system winding in the stator.
- the rotary electric machine system for an electric vehicle includes a rotary electric machine that supplies electric power to a main engine and an auxiliary machine mounted on the electric vehicle, and a prime mover that drives the rotary electric machine.
- the rotary electric machine is the rotary electric machine according to the present invention, in which electric power is supplied from the first system winding to the main engine via the first power converter, and the second electric power is supplied from the second system winding. Power is supplied to the auxiliary equipment via the converter.
- the rotary electric system for an electric vehicle includes a rotary electric machine for driving the electric vehicle and a battery for supplying electric power to the rotary electric machine via the first power converter.
- the rotary electric machine is the rotary electric machine according to the present invention, in which electric power is supplied from the battery to the first system winding via the first power converter, and the second system winding to the second system winding. Regenerative power is charged to the battery via the power converter.
- the rotary electric machine has two systems of three-phase AC windings having different configurations, the efficiency can be improved without complicating the winding configuration.
- FIG. It is sectional drawing in the rotation axis direction of the rotary electric machine which is Example 1.
- FIG. It is a partial cross-sectional view in the direction perpendicular to the rotation axis of the rotary electric machine of Example 1.
- FIG. It is a development view of the stator of Example 1.
- FIG. It is a development view of the stator of the rotary electric machine which is the modification 1.
- FIG. It is a development view of a part of a stator of a rotary electric machine which is a modification 2.
- FIG. It is a development view of the stator of Example 1 (FIG. 3 reprinted).
- stator which shows the 2nd example of the step in the side wall in a slot. It is a developed view of the stator which shows the 3rd example of the step in the side wall in a slot. It is a development view of the stator which shows the 1st example of the winding composition of the 1st system winding, the 2nd system winding and the 3rd system winding. It is a development view of the stator which shows the 2nd example of the winding composition of the 1st system winding, the 2nd system winding and the 3rd system winding.
- stator shows the 3rd example of the winding composition of the 1st system winding, the 2nd system winding and the 3rd system winding.
- stator shows the 3rd example of the winding composition of the 1st system winding, the 2nd system winding and the 3rd system winding.
- block diagram which shows the structure of the rotary electric machine system for the dump truck which is a 6th embodiment.
- block diagram which shows the structure of the rotary electric machine system for the electric bus which is Example 7.
- FIG. 1 is a cross-sectional view of the rotary electric machine according to the first embodiment of the present invention in the direction of the rotation axis.
- the rotary electric machine of the first embodiment is a field winding type synchronous machine.
- the rotary electric machine 100 of the first embodiment can be applied as a generator having an output of several thousand kVA and a rotation speed of several thousand min -1 , which is a power source for a large dump truck.
- the rotary electric machine of the first embodiment is rotationally driven by a prime mover such as an engine.
- the rotor 2 and the stator 3 are arranged in the frame 1.
- a coil end 6 and a coil end 7 project from the axial ends of the rotor 2 and the stator 3, respectively.
- the bearing 4 provided in the frame 1 is fixed to the rotor 2 and rotatably supports one end of the shaft 5 which is a rotation shaft.
- the other end of the shaft 5 is connected to a prime mover (not shown) and supported by a bearing on the prime mover side.
- the other end of the shaft 5 may be rotatably supported by a bearing included in the rotary electric machine 100.
- An inflow port 8 into which the refrigerant 9 flows is arranged in the frame 1.
- the refrigerant 9 is sent to the rotary electric machine 100 by a blower or the like (not shown).
- the refrigerant 9 that has flowed into the frame 1 from the inflow port 8 flows to the right in FIG. 1, that is, in the direction of the rotation axis of the rotary electric machine 100, and flows out to the atmosphere outside the frame 1.
- FIG. 2 is a partial cross-sectional view of the rotary electric machine 100 of the first embodiment shown in FIG. 1 in a direction perpendicular to the rotation axis.
- the rotor 2 is composed of a rotor core 10, a field winding 11, a damper bar 12 (braking winding), and a rotor wedge 13.
- the stator 3 is composed of a stator core 14, a first system winding 15 and a second system winding 16 which are three-phase AC windings, and a stator wedge 17.
- the rotor 2 and the stator 3 face each other via the air gap 22.
- the first system winding 15 is arranged in the first slot 18, and the second system winding 16 is arranged in the second slot 19.
- the passage of the refrigerant 9 in the frame 1 is composed of a back duct 20, an axial duct 21, and an air gap 22.
- the rear duct 20 and the axial duct 21 are provided at regular intervals in the circumferential direction.
- the first slot 18 in which the first system winding 15 is arranged extends radially through the stator core 14 from the inner wall surface of the stator core 14 facing the surface of the rotor 2, and the radial direction is the depth direction. , It consists of a groove whose longitudinal direction is the rotation axis direction. Further, the second slot 19 in which the second system winding 16 is arranged is adjacent to the first slot 18 along the depth direction. In the first embodiment, as shown in FIG. 2, the portion where the first slot 18 extends in the depth direction is referred to as the second slot 19.
- the plurality of first slots 18 and the plurality of second slots 19 are arranged at equal intervals along the circumferential direction of the stator core 14.
- the slot spacing of the second slot 19 is larger than that of the first slot 18, and corresponds to two slots of the first slot 18 in the first embodiment. Therefore, the number of slots in the second slot 19 is smaller than that in the first slot 18, which is half that of the first slot 18 in the first embodiment. Therefore, in the first embodiment, of the first system winding 15 and the second system winding 16, the slot in which only the first system winding 15 is arranged and both windings deeper than this slot are provided.
- the slots to be arranged are alternately arranged along the circumferential direction in the stator core 14.
- the induced voltage of the second system winding 16 can be made smaller than that of the first system winding 15, as will be described later. Therefore, when the rotary electric machine 100 operates as a generator, the output voltage of the second system winding 16 can be made smaller than that of the first system winding 15.
- Example 1 shown in FIG. 2 the number of slots in the second slot 19 is half that of the first slot 18, but the number of the second slots 19 is not limited to this, and the number of the second slots 19 is a desired characteristic (induced voltage, output). It can be set appropriately according to the voltage, etc.).
- the second system winding 16 is provided so as to overlap the first system winding 15 in the depth direction of the slot as shown in FIG. Therefore, since the number of slots may be set for the first system winding 15 and a part of the number of slots may be used for the second system winding 16, the rotor may have two windings.
- the slot configuration is not complicated.
- the first system winding 15 and the second system winding 16 are independent without being electrically coupled. Therefore, when an external circuit is connected to each of the first system winding 15 and the second system winding 16, the circulating current can be suppressed, so that the efficiency decrease due to the circulating current can be prevented. Further, although the stator 3 includes the first system winding 15 and the second system winding 16, the winding configuration is not complicated.
- FIG. 3 is a developed view showing the cross-sectional configuration of the stator 3 of the first embodiment shown in FIG. 2 in a straight line.
- the air gap 22 (FIG. 2) is located on the lower side of FIG. 3, and the frame 1 (FIG. 2) is located on the upper side of FIG.
- the first system winding 15 and the second system winding 16 are wound in a distributed winding.
- the number of poles of the rotary electric machine 100 is 10 poles
- the number of slots of the first slot 18 and the second slot 19 is 90 slots and 45 slots, respectively.
- the first system winding 15 and the second system winding 16 are an upper coil (denoted as “upper” in FIG. 3) and a bottom coil arranged so as to be overlapped along the depth direction of the slot. (Indicated as "bottom” in FIG. 3).
- the three phases of the first system winding 15 are described as U1, V1, W1, and the three phases of the second system winding are described as U2, V2, W2.
- Each slot is marked with a number in parentheses as the slot number.
- the positive and negative signs (+,-) indicate the direction in which the current flows (current polarity), and the direction toward the back side is indicated by "+” and the direction toward the front side is "-" with respect to the drawing. Indicated by.
- the number of slots for each pole is the second. It is 3 for the one system winding 15 and 1.5 for the second system winding 16.
- each phase winding (UUU, VVV, WWW) composed of three coils arranged continuously is repeatedly arranged in a constant phase order (UUU-VVV-WWW).
- a phase winding composed of one coil and a phase winding composed of two coils are alternately arranged.
- the number of slots for each pole that is, the number of coils for each phase and one pole becomes 2.5 on average.
- a phase winding composed of one coil and a phase winding composed of two coils are arranged in a constant phase order.
- the phase winding consisting of one coil (U, V, W) and the phase winding consisting of two coils (UU, VV, WW) have different number of coils, and the phase winding has a circumference of the stator 3.
- the coils of two adjacent phase windings are repeatedly arranged in a fixed phase order so that they are uniformly distributed along the direction (U-VV-W-UU-V-WW). .
- the number of slots (hereinafter referred to as “the number of crossings”) through which the crossover wire connecting the coils (upper bottom coil) in the slots to form a coil loop is passed is the first system winding. In 15, it is 7 (slot), and in the second system winding 16, it is 5 (slot).
- the upper coil (1) and the bottom coil (7) of the first system winding 15 are connected by these crossovers, and the upper coil (1) and the bottom coil of the second system winding 16 are connected. (5) is connected.
- the number of crossovers of the first system winding 15 is 7 (slots) because the crossover wire is passed to 7 slots from the upper coil (1) to the bottom coil (7).
- the number of crossovers of the second system winding 16 is 5 (slots) because the crossover wire is passed to 5 slots from the upper coil (1) to the bottom coil (5).
- the number of migrations is not limited to 7 and 5 described above, and can be set as appropriate.
- the three-phase connection of the first system winding 15 and the second system winding 16 is a Y connection.
- the number of parallel connections of the Y connection is 5 in parallel for the first system winding 15 and 10 in parallel for the second system winding 16.
- the number of parallels can be appropriately set according to the specifications of the rotary electric machine.
- the man-hours for winding the distributed winding can be reduced as compared with the case where both are the same number, so that the manufacturing cost can be reduced. According to the study of the present inventor, the winding man-hours can be reduced by 25% in the first embodiment.
- the first embodiment is suitable when the induced electromotive force of the first system winding 15 is higher than the induced electromotive voltage of the second system winding 16.
- the physique of the rotary electric machine depends on the magnitude of the induced electromotive force
- the first system winding 15 having a large induced electromotive voltage is used among the first system winding 15 and the second system winding 16.
- the field magnetic flux amount of the rotor 2 is set. Further, in order to make the induced electromotive force of the second system winding 16 smaller than that of the first system winding 15, the number of turns of the second system winding 16 is made smaller than that of the first system winding 15.
- the second system winding 16 is maintained while maintaining the induced electromotive voltage of the first system winding 15.
- the number of parallel circuits is increased, the number of turns is reduced, and the number of crossings is increased. It is effective to change the number of slots and reduce the number of slots.
- the number of slots in the second slot 19 is made smaller than that in the first slot 18.
- the first system winding 15 is located on the inner diameter side of the second system winding 16. That is, the first system winding 15 is arranged closer to the air gap 22 than the second system winding 16. Therefore, the magnetic flux interlinking the first system winding 15 is larger than that of the second system winding 16, so that the number of interlinking magnetic fluxes of the first system winding 15 and the second system winding 16 is large or small. It becomes easier to set the difference. Therefore, the induced electromotive voltage of the first system winding 15 and the second system winding 16 is surely different from that of the second system winding 16 so that the induced electromotive voltage of the first system winding 15 is larger than that of the second system winding 16. Can be set.
- the first system winding 15 is arranged closer to the air gap 22 than the second system winding 16, the first system winding 15 extends in the depth direction in the first slot 18.
- the second system winding 16 faces the inner wall surface of the two surfaces of the stator core 14 and extends in the depth direction in the second slot 19, the inner wall surface of the two surfaces of the stator core 14 and the bottom surface of the second slot 19. Facing one side of the stator core 14 to be. That is, the number of surfaces of the stator core 14 facing the winding is smaller in the first system winding 15 than in the second system winding 16.
- the number of surfaces of the stator core 14 in the slot which becomes the discharge surface when corona discharge occurs, is that of the first system winding 15 having a larger induced electromotive force than that of the second system winding 16. Few. As a result, it is possible to suppress a decrease in the insulation life of the rotary electric machine due to the influence of the corona discharge.
- a foamed coil having the same wire size and a different number of turns is molded in advance, and this foamed coil is fixed.
- the efficiency of manufacturing the stator 3 provided with the first system winding 15 and the second system winding 16 is improved. Therefore, it is possible to reduce the manufacturing cost of a rotary electric machine having two windings having different configurations.
- FIG. 4 is a developed view of a stator of a rotary electric machine which is a modification 1.
- the number of slots in the first slot 18 is 90 slots as in the first embodiment, but the number of slots in the second slot 19 is smaller than that in the first embodiment (45 slots), and the number of slots is 30. be. Further, the number of slots for each pole and each phase is 3 in the first system winding 15 as in the first embodiment, and is 1 in the second system winding 16 less than in the first embodiment.
- the position of the second slot 19 can be aligned with the position of the first slot 18. Therefore, where the positions of both slots coincide, the first slot 18 and the second slot 19 have a rectangular cross section similar to that of the first slot 18, and one continuous slot deeper than the first slot 18. Configure. As a result, two windings having different configurations can be efficiently attached to the stator core 14.
- FIG. 5 is a development view of a part of the stator of the rotary electric machine which is the modification 2.
- the number of slots in the first slot 18 is 90 slots as in the first embodiment, but the number of slots in the second slot 19 is larger than that in the first embodiment (45 slots), and the number of slots is 60. be. Further, the number of slots for each pole and each phase is 3 in the first system winding 15 which is the same as in the first embodiment, and is more than 2 in the second system winding 16 than in the first embodiment.
- winding can be attached to the stator core in the second modification by changing the wire shape of the winding to a round wire or the like.
- each position of the second slot 19 matches the first slot 18 as in the modified example 1 is represented by the equations (1) and (2).
- P, N s1 and N s2 are the number of poles, the number of slots in the first slot 18, and the number of slots in the second slot 19, respectively.
- each position of the second slot 19 is the first slot. Consistent with 18.
- FIG. 6 is a development view of a stator of a rotary electric machine which is a modification 3.
- the number of slots in the first slot 18 is 90 slots as in the first embodiment, but the number of slots in the second slot 19 is smaller than that in the first embodiment (45 slots), with 15 slots. be.
- the first system winding 15 is wound in a distributed winding as in the first embodiment, but the second system winding 16 is wound in a concentrated winding.
- the configuration of the stator in the first embodiment is not limited to the field winding type synchronous machine, but can be applied to a cage type inducer, a winding type inducer, a permanent magnet type synchronous machine, and the like.
- FIG. 7 is a developed view showing the cross-sectional configuration of the stator of the rotary electric machine according to the second embodiment of the present invention by extending it in a straight line.
- the configuration other than the stator is the same as that of the first embodiment. Similar to FIG. 3, the air gap 22 (FIG. 2) is located on the lower side of FIG. 7, and the frame 1 (FIG. 2) is located on the upper side of FIG. 7.
- the position of the magnetic pole center by the U-phase winding of the first system winding 15 and the position of the magnetic pole center by the U-phase winding of the second system winding 16 are set. ,Match.
- FIG. 8 is a development view of the stator of the above-mentioned Example 1 (FIG. 3 reprinted).
- the windings are arranged so that the phase difference angle ⁇ in FIG. 8 becomes 0.
- the windings of the first system winding 15 are arranged so as to be shifted by one slot without changing the second system winding 16 in FIG.
- FIG. 9 shows a case where the magnetic pole centers of the first system winding 15 and the second system winding 16 differ by ⁇ in the phase difference angle, and the three-phase voltage is applied on the rotating coordinates. It is a representation figure.
- ⁇ is the phase difference angle between the d-axis of the rotating coordinate and the U phase (U 1 ) of the first system winding.
- FIG. 10 shows dq conversion of the three-phase voltages of the first system winding 15 and the second system winding 16 shown in FIG. 9 with reference to the first system winding 15 based on the two-reaction theory. It is a figure which shows the direction of a q-axis voltage vector.
- the d1 - q 1 -axis vector indicates the three-phase voltage of the first system winding 15
- the d2-q 2 -axis vector indicates the three-phase voltage of the second system winding 16.
- V d1 , V d2 , V q1 , V d2 , I d1 , I d2 , I q1 and I q2 are the d-axis voltage of the first system winding and d of the second system winding, respectively.
- X d1 , X d2 , X q1 , X q2 , R 1 , R 2 , E 1 , E 2 , X d1 d2 and X d2 d1, and X q 1 q 2 and X q 2 q 1, respectively, are the d-axis of the first system winding.
- the voltage of the first system winding 15 and the voltage of the second system winding 16 change when the parameter of one system changes, the parameter of the other system changes. Even without it, it will change. That is, the first system winding 15 and the second system winding 16 are independent as an electric circuit, but are magnetically coupled via mutual reactance.
- FIG. 11 is a voltage vector diagram showing the voltage (V 1 ) of the first system winding whose dq axis voltage component is represented by the equation (3).
- ⁇ 1 is the current phase angle
- ⁇ 1 is the power factor angle
- ⁇ 1 is the load angle.
- the underlined voltage component in FIG. 11 is a parameter that depends on the mutual reactance between the coaxial cables. Note that V 01 is a voltage vector when mutual inductance does not occur.
- V 1 is ahead of V 01 in phase. That is, the power factor angle is increased due to the mutual reactance between the coaxial cables, so that the power factor is reduced.
- the phase difference angle ⁇ (FIG. 8) between the position of the magnetic pole center 23 due to the U-phase winding of the first system winding 15 and the position of the magnetic pole center 24 due to the U-phase winding of the second system winding 16 is set.
- the generation of mutual reactance between the coaxials can be suppressed and the decrease in the power factor can be suppressed. Therefore, it is possible to prevent a decrease in the efficiency of the rotary electric machine while providing the first system winding 15 and the second system winding 16.
- the first system winding 15 and the second system winding are wound by matching the magnetic poles of the first system winding 15 and the second system winding 16. It is possible to prevent a decrease in the efficiency of the rotary electric machine provided with the wire 16.
- FIG. 12 is a developed view of a stator of a rotary electric machine according to a third embodiment of the present invention.
- the configuration other than the stator is the same as that of the first embodiment. Similar to FIG. 3, the air gap 22 (FIG. 2) is located on the lower side of FIG. 12, and the frame 1 (FIG. 2) is located on the upper side of FIG.
- the shapes of all the slots provided in the stator 3 are the same. That is, in the illustrated stator cross section, the cross-sectional shape of all the slots in which the windings are arranged is a rectangular shape having the same depth.
- the configurations of the first system winding 15 and the second system winding 16 are the same as those in the above-mentioned Example 1 (FIG. 3). Therefore, in the slot in which only the first system winding 15 is arranged among the first system winding 15 and the second system winding 16, the hole portion 25 is located on the outer diameter side of the first system winding 15. Will be located.
- the cooling refrigerant 9 uses the rear duct 20, the axial duct 21, and the air gap 22 as passages in the axial direction of the rotary electric machine. It flows. Further, in the third embodiment, the hole portion 25 in the slot in which only the first system winding 15 is arranged serves as a passage for the refrigerant 9. As a result, the first system winding 15 comes into direct contact with the refrigerant 9 flowing through the pores 25. Therefore, the heat transfer area of the stator core 14 increases.
- the cooling performance of the stator 3 is improved, so that the temperature rise of the first system winding 15 can be surely suppressed. Further, since the first system winding 15 can be efficiently cooled by the refrigerant passing through the hole 25, when the insulation type having a large allowable temperature rise is applied as the insulation type of the winding, the rotary electric machine uses the rear duct 20 and the rear duct 20. It is not necessary to have the axial duct 21. In this case, the configuration of the rotary electric machine is simplified.
- the side wall of the stator core 14 has a step in the slot between the first slot 18 and the second slot 19.
- the configurations of the first system winding 15 and the second system winding 16 are the same as those in the first embodiment (FIG. 3). Further, as in the first embodiment, the position of the second slot 19 coincides with the position of the first slot 18.
- FIG. 13 is a developed view of a stator showing a first example of a step on a side wall in a slot.
- the slot width of the first slot 18 is larger than that of the second slot 19.
- the number of turns of the first system winding 15 can be increased to increase the difference in the induced electromotive force between the first system winding 15 and the second system winding 16.
- the stator can be easily or efficiently manufactured by applying the manufacturing method of inserting the foamed coil into the slot.
- FIG. 14 is a developed view of a stator showing a second example of a step on a side wall in a slot.
- the slot width of the second slot 19 is larger than that of the first slot 18.
- the size of the strands and the number of parallel wires can be increased to reduce the current density of the second system winding 16.
- FIG. 15 is a developed view of a stator showing a third example of a step on a side wall in a slot.
- a step that narrows the slot width and a step that widens the slot width are continuous between the first slot 18 and the second slot 19. That is, between the first slot 18 and the second slot 19, the inner wall surface of the slot of the stator core 14 has a convex portion 26 protruding in the circumferential direction, that is, in the direction of narrowing the slot width.
- the convex portion 26 serves as a stopper for the second system winding 16, it is possible to prevent the second system winding 16 from falling off to the inner diameter side. Further, since the first system winding 15 and the second system winding 16 are arranged at intervals by the convex portion 26, the first system winding 15 and the second system winding 16 are short-circuited in the slot. Can be prevented.
- the stator core having the slot shape shown in FIG. 15 can be manufactured by integrally molding an electromagnetic steel plate.
- the fifth embodiment further includes a third system winding 27 in addition to the first system winding 15 and the second system winding 16.
- the configurations of the first system winding 15 and the second system winding 16 are the same as those in the first embodiment (FIG. 3). Further, as in the first embodiment, the position of the second slot 19 coincides with the position of the first slot 18.
- FIG. 16 is a development view of the stator 3 showing a first example of the winding configuration of the first system winding 15, the second system winding 16, and the third system winding 27.
- the configurations of the first system winding 15 and the second system winding 16 are the same as those of the above-mentioned modification 1 (FIG. 4) of the first embodiment, but further.
- the third system winding 27 is arranged so as to overlap the second system winding 16 along the depth direction of the slot.
- the position of the third system winding 27 coincides with the position of the second system winding 16 and the first system winding 15. Therefore, the number of slots of the third system winding 27 is the same as that of the second system winding 16.
- FIG. 17 is a development view of the stator 3 showing a second example of the winding configuration of the first system winding 15, the second system winding 16, and the third system winding 27.
- the number of slots of the third system winding 27 is the same as that of the first example (FIG. 16) described above, but the number of slots of the second system winding 16 is the second. It is the same as the one-system winding 15.
- FIG. 18 is a development view of the stator 3 showing a third example of the winding configuration of the first system winding 15, the second system winding 16, and the third system winding 27.
- the number of slots of the second system winding 16 and the third system winding 27 is 2/3 and 1 / of the number of slots of the first system winding 15, respectively. It is 3.
- the first system winding 15, the second system winding 16 and the third system winding 27 are not electrically connected to each other and are independent of each other.
- the first system winding 15, the second system winding 16, and the third system winding 27 are arranged in this order from the inner diameter side to the outer diameter side of the stator, but the present invention is limited to this. Instead, the first and second to nth system windings (n (integer) ⁇ 3) may be sequentially arranged.
- the number of slots of the i-th system winding (1 ⁇ i (integer) ⁇ n) is N si , "N s1 ⁇ N s2 ⁇ N s3 ⁇ ... ⁇ N sn ". The number of slots is set.
- a stator having three or more windings can be configured.
- FIG. 19 is a block diagram showing a configuration of a rotary electric machine system for a dump truck according to a sixth embodiment of the present invention.
- the rotating shaft of the rotary electric machine 100 As shown in FIG. 19, the rotating shaft of the rotary electric machine 100 according to any one of the above-described Examples 1 to 5 is directly connected to the rotating shaft of the engine 200 which is a prime mover via a coupling 31.
- the rotary electric machine 100 When the rotary electric machine 100 is rotated by the engine 200, the rotary electric machine 100 generates three-phase AC power.
- the three-phase AC power output by the first system winding 15 and the second system winding 16 included in the rotary electric machine 100 is supplied to the power converter 201a and the power converter 201b, respectively.
- the power converter 201a converts the three-phase AC power from the first system winding 15 into power, and supplies the converted power to the drive rotary electric machine 300 which is the main engine for rotationally driving the wheels of the dump truck. Further, the power converter 201b converts the three-phase AC power from the second system winding 16 into electric power, and supplies the converted electric power to the blower 301 that sends the refrigerant 9 for cooling the rotary electric machine 100 to the rotary electric machine 100.
- one rotary electric machine 100 can supply electric power for driving the drive rotary electric machine 300 and the blower 301. Therefore, the rotary electric system for the dump truck can be made smaller or lighter.
- the electric power from the second system winding 16 is not limited to the blower 301, and may be supplied as electric power for driving other electric auxiliary machines.
- FIG. 20 is a block diagram showing a configuration of a rotary electric machine system for an electric bus according to a seventh embodiment of the present invention.
- the rotating shaft of the rotary electric machine 100 is directly connected to the speed reducer 202 via the coupling 31.
- the switch 205 When running an electric bus, the switch 205 connects the battery 204 to the power converter 203a.
- the power converter 203a converts the DC power from the battery 204 into power and supplies the three-phase AC power to the first system winding 15 of the rotary electric machine 100.
- the rotary electric machine 100 operates as an electric machine, and the power of the rotary electric machine 100 is transmitted to the wheels via the speed reducer 202.
- the switch 205 connects the battery 204 to the power converter 203b.
- the power converter 203b converts the regenerated power from the second system winding 16 of the rotating electric machine 100 in the regenerated state into power, and outputs DC power. This DC power is charged in the battery 204.
- the charging of the battery by the regenerative power can be controlled accurately.
- the present invention is not limited to the above-described embodiment, but includes various modifications.
- the above-mentioned examples have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations.
- stator configuration in each embodiment can be applied to various rotary electric machines such as a field winding type synchronous machine, a cage type inducer, a winding type inducer, and a permanent magnet type synchronous machine.
- rotary electric machine in each embodiment can be applied to various devices and systems that utilize the output (generated power and rotational driving force) of the rotary electric machine.
- the rotary electric system according to the above-mentioned Examples 6 and 7 may be applied not only to a dump truck or an electric bus but also to another electric vehicle, an electric ship, or the like. Further, the rotary electric machine system according to the seventh embodiment may be applied to an elevator (particularly, a high-speed / large-capacity elevator). In this case, the rotary electric machine 100 is applied to the hoisting machine.
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Abstract
Description
Claims (15)
- 回転子と、
三相交流巻線を有する固定子と、
を備える回転電機において、
前記三相交流巻線は、互いに独立している第一系統巻線と第二系統巻線とを含み、
前記第一系統巻線が位置する複数の第一スロットと、
前記第二系統巻線が位置する複数の第二スロットと、
を備え、
前記第一スロットのスロット数は、前記第二スロットのスロット数以上であり、
前記第一系統巻線は、前記固定子において、前記第二系統巻線よりも内径側に位置することを特徴とする回転電機。 - 請求項1に記載の回転電機において、
前記第一系統巻線の誘導起電圧が前記第二系統巻線の誘導起電圧よりも大きいことを特徴とする回転電機。 - 請求項1に記載の回転電機において、
前記第二スロットの位置が前記第一スロットの位置と一致することを特徴とする回転電機。 - 請求項3に記載の回転電機おいて、
前記回転電機の極数をPとし、前記第一スロットのスロット数をNs1とする場合、整数Nに対し、Ns1/(P×N×3(相数)×0.5)の値が整数であり、前記第二スロットのスロット数が、Ns1/Nであることを特徴とする回転電機。 - 請求項1に記載の回転電機において、
前記第一系統巻線による磁極の位置と前記第二系統巻線による磁極の位置とが一致していることを特徴とする回転電機。 - 請求項1に記載の回転電機において、
前記複数の第一スロットは、前記第一系統巻線の外径側に空孔部を有する前記第一スロットを含むことを特徴とする回転電機。 - 請求項3に記載の回転電機において、
前記第一スロットと前記第二スロットとの間において、前記固定子の側壁が段差を有することを特徴とする回転電機。 - 請求項7に記載の回転電機において、
前記第二スロットの幅が前記第一スロットよりも小さくなるように、前記段差が構成されていることを特徴とする回転電機。 - 請求項7に記載の回転電機において、
前記第二スロットの幅が前記第一スロットよりも大きくなるように、前記段差が構成されていることを特徴とする回転電機。 - 請求項7に記載の回転電機において、
前記第一スロットと前記第二スロットとの間において、前記固定子の前記側壁が突出するように、前記段差が構成されていることを特徴とする回転電機。 - 請求項1に記載の回転電機において、
前記三相交流巻線は、さらに、第三ないし第n系統巻線(n(整数)≧3)を有し、前記第一系統巻線ないし前記第n系統巻線が、順に、前記固定子の内径側から外径側に向かって配置されていることを特徴とする回転電機。 - 電動車両に搭載される主機および補機に電力を供給する回転電機と、
前記回転電機を駆動する原動機と、
を備える電動車両用回転電機システムにおいて、
前記回転電機は、請求項1に記載の回転電機であり、
前記第一系統巻線から第一の電力変換器を介して前記主機に電力が供給され、
前記第二系統巻線から第二の電力変換器を介して前記補機に電力が供給されることを特徴とする電動車両用回転電機システム。 - 請求項12に記載の電動車両用回転電機システムにおいて、
前記電動車両がダンプトラックであり、
前記主機が駆動用回転電機であり、
前記補機が冷却用ブロアであることを特徴とする電動車両用回転電機システム。 - 電動車両を駆動する回転電機と、
第一の電力変換器を介して前記回転電機に電力を供給する電池と、
を備える電動車両用回転電機システムにおいて、
前記回転電機は、請求項1に記載の回転電機であり、
前記電池から前記第一の電力変換器を介して前記第一系統巻線に電力が供給され、
前記第二系統巻線から第二の電力変換器を介して前記電池に回生電力が充電されることを特徴とする電動車両用回転電機システム。 - 請求項14に記載の回転電機システムにおいて、
前記電動車両が電動バスであることを特徴とする回転電機システム。
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AU2021386717B2 (en) | 2024-03-21 |
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AU2021386717A1 (en) | 2023-06-22 |
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