WO2018181541A1 - Dispositif d'entraînement - Google Patents

Dispositif d'entraînement Download PDF

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Publication number
WO2018181541A1
WO2018181541A1 PCT/JP2018/012903 JP2018012903W WO2018181541A1 WO 2018181541 A1 WO2018181541 A1 WO 2018181541A1 JP 2018012903 W JP2018012903 W JP 2018012903W WO 2018181541 A1 WO2018181541 A1 WO 2018181541A1
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WIPO (PCT)
Prior art keywords
rotating electrical
electrical machine
state
rotor
stator
Prior art date
Application number
PCT/JP2018/012903
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English (en)
Japanese (ja)
Inventor
池本正幸
宮路剛
津田哲平
山田航
Original Assignee
アイシン・エィ・ダブリュ株式会社
アイシン精機株式会社
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Application filed by アイシン・エィ・ダブリュ株式会社, アイシン精機株式会社 filed Critical アイシン・エィ・ダブリュ株式会社
Publication of WO2018181541A1 publication Critical patent/WO2018181541A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another

Definitions

  • the present invention relates to a drive device including a first rotary electric machine and a second rotary electric machine, and an inverter device that drives the first rotary electric machine and the second rotary electric machine.
  • Patent Document 1 discloses a drive device capable of changing the connection of armature windings. Is disclosed. Specifically, as shown in FIG. 2 of Patent Document 1, the three-phase AC motor (20) of Patent Document 1 includes connection terminals (A4 to A6) for pulling out ends of windings of each phase. And connection terminals (B1 to B3) for drawing out the intermediate points of the windings of the respective phases.
  • the driving device of Patent Document 1 is a winding switch (30) that switches the connection state of the windings between a state in which the connection terminals (A4 to A6) are short-circuited and a state in which the connection terminals (B1 to B3) are short-circuited. It has.
  • the connection terminals (A4 to A6) are short-circuited, the winding impedance of each phase is short-circuited to increase the winding impedance.
  • the connection terminals (B1 to B3) are short-circuited, the windings of each phase are short-circuited.
  • the middle point of the line is short-circuited, the winding impedance is reduced.
  • JP 2010-22165 (paragraphs 0013 and 0021, FIG. 2)
  • the first characteristic configuration of the drive device including the first rotating electrical machine and the second rotating electrical machine and the inverter device that drives the first rotating electrical machine and the second rotating electrical machine is the first characteristic configuration described above.
  • the rotating electrical machine includes a first rotor and a first stator having a plurality of first stator coils that form a rotating magnetic field
  • the second rotating electrical machine includes a second rotor and a plurality of phases that form a rotating magnetic field.
  • a second stator having a second stator coil, wherein the first rotor and the second rotor are coaxially arranged and connected to each other, the first stator coil and the second stator coil And a state in which both the first rotating electrical machine and the second rotating electrical machine are driven by the inverter device in a state in which the first and the second rotating electrical machines are electrically connected in series for each phase, a series driving state, two A state in which both the first rotating electrical machine and the second rotating electrical machine are driven by the inverter device in a state in which the data coil is electrically connected in parallel for each phase is defined as a parallel drive state, and the first rotating electrical machine and the A state in which one of the second rotating electrical machines is driven by the inverter device is set as a single driving state, and the driving states of the first rotating electrical machine and the second rotating electrical machine are set as the series driving state, the parallel driving state, and the single driving. It is in the point provided with the switching control part which switches to at least one of the states.
  • both the first rotating electrical machine and the second rotating electrical machine are in a state in which the first stator coil and the second stator coil are electrically connected in series for each phase in the series drive state.
  • the operating characteristics realized when the driving state of the first rotating electrical machine and the second rotating electrical machine is switched to the series driving state are the induced voltage constant of the first rotating electrical machine and the second rotating electrical machine.
  • the operating characteristics of a single rotating electrical machine having an induced voltage constant that is the sum of the induced voltage constants are the same.
  • the operation characteristics correspond to the induced voltage constants of the first rotating electrical machine and the second rotating electrical machine.
  • variable range of the operating characteristics by switching the driving state of the first rotating electrical machine and the second rotating electrical machine between the series driving state and the parallel driving state or the single driving state is the induced voltage constant of the first rotating electrical machine or the second This corresponds to the induced voltage constant of the two-rotary electric machine.
  • the induced voltage constant of the first rotating electrical machine and the induced voltage constant of the second rotating electrical machine can be basically set independently of each other. As a result, according to the first characteristic configuration described above, it is possible to realize a drive device that can easily ensure the design flexibility of the variable width of the operation characteristics.
  • the second characteristic configuration of the driving device including the first rotating electrical machine and the second rotating electrical machine, and the inverter device that drives the first rotating electrical machine and the second rotating electrical machine is the first feature.
  • the rotating electrical machine includes a first rotor and a first stator having a plurality of first stator coils that form a rotating magnetic field
  • the second rotating electrical machine includes a second rotor and a plurality of phases that form a rotating magnetic field.
  • first stator coil and the second stator coil are electrically connected in series for each phase, and both the first rotating electrical machine and the second rotating electrical machine are driven by the inverter device.
  • Series drive A state in which one of the first rotating electrical machine and the second rotating electrical machine is driven by the inverter device is a single driving state, and the driving state of the first rotating electrical machine and the second rotating electrical machine is the series driving state.
  • a switching control unit for switching to the single drive state is provided.
  • both the 1st rotation electrical machinery and the 2nd rotation electrical machinery in the state where the 1st stator coil and the 2nd stator coil were electrically connected in series for every phase Is driven by the inverter device the operating characteristics realized when the driving state of the first rotating electrical machine and the second rotating electrical machine is switched to the series driving state are the induced voltage constant of the first rotating electrical machine and the second rotating electrical machine.
  • the operating characteristics of a single rotating electrical machine having an induced voltage constant that is the sum of the induced voltage constants are the same.
  • the operation characteristics according to the induced voltage constants of the first rotating electrical machine and the second rotating electrical machine are obtained.
  • variable range of the operating characteristics by switching the driving state of the first rotating electrical machine and the second rotating electrical machine between the series driving state and the single driving state is the induced voltage constant of the first rotating electrical machine or the second rotating electrical machine. It depends on the induced voltage constant.
  • the induced voltage constant of the first rotating electrical machine and the induced voltage constant of the second rotating electrical machine can be basically set independently of each other. As a result, according to the second characteristic configuration, it is possible to realize a drive device that can easily secure a design freedom of a variable width of the operation characteristics.
  • the operating characteristics realized when the first rotating electrical machine is driven in the single drive state can be made different from each other. Therefore, it is possible to switch the operating characteristic of the driving device from the three operating characteristics realized in the three driving states of the series driving state and the two single driving states to an appropriate one at that time.
  • the third characteristic configuration of the drive device including the first rotating electrical machine and the second rotating electrical machine, and the inverter device that drives the first rotating electrical machine and the second rotating electrical machine is the first feature.
  • the rotating electrical machine includes a first rotor and a first stator having a plurality of first stator coils that form a rotating magnetic field
  • the second rotating electrical machine includes a second rotor and a plurality of phases that form a rotating magnetic field.
  • a second stator having a second stator coil, wherein the first rotor and the second rotor are arranged side by side on the same axis and connected to each other, and the inverter device is connected by a common inverter circuit.
  • the AC power is supplied to each of the first stator coil and the second stator coil.
  • the third feature configuration since AC power can be supplied from a common inverter circuit to each of the first stator coil and the second stator coil, an inverter for supplying AC power to the first stator coil Compared to the case where the circuit and the inverter circuit for supplying AC power to the second stator coil are provided separately, when the series circuit of the first stator coil and the second stator coil is formed, It becomes easy to supply AC power between both ends. Therefore, a serial drive state is realized in which both the first rotating electrical machine and the second rotating electrical machine are driven by the inverter device in a state where the first stator coil and the second stator coil are electrically connected in series for each phase.
  • the first feature configuration it is possible to realize a drive device that can easily secure the design flexibility of the variable width of the operation characteristics. Further, according to the third feature configuration, compared to a case where an inverter circuit for supplying AC power to the first stator coil and an inverter circuit for supplying AC power to the second stator coil are provided separately. Thus, it is possible to reduce the size of the inverter device and to reduce the loss of the entire inverter device.
  • the drive device 1 includes a first rotating electrical machine 10 and a second rotating electrical machine 20.
  • the drive device 1 includes an inverter device 30 (see FIG. 5) that drives the first rotating electrical machine 10 and the second rotating electrical machine 20.
  • the drive device 1 causes the vehicle to travel by transmitting the torque of one or both of the first rotating electrical machine 10 and the second rotating electrical machine 20 to the wheels 90.
  • the drive device 1 is a drive device for an electric vehicle that includes only a rotating electrical machine (here, the first rotating electrical machine 10 and the second rotating electrical machine 20) as a driving force source for the wheels 90.
  • the “rotary electric machine” is used as a concept including any of a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary.
  • the first rotating electrical machine 10 includes a first rotor 11 and a first stator 12.
  • the first stator 12 includes a plurality of first stator coils 13 that form a rotating magnetic field.
  • the first stator coil 13 is wound around a first stator core 14 that is a stator core of the first stator 12.
  • the first rotating electrical machine 10 is a rotating field type rotating electrical machine.
  • the first rotating electrical machine 10 is an inner rotor type rotating electrical machine, and the first rotor 11 is radially inward of the first stator core 14 and overlaps the first stator core 14 when viewed in the radial direction. Placed in position.
  • the first rotating electrical machine 10 is a permanent magnet type (in this example, an embedded permanent magnet type) synchronous rotating electrical machine, and the first rotor 11 corresponds to each of a plurality of magnetic poles.
  • One or more permanent magnets are provided.
  • the second rotating electrical machine 20 includes a second rotor 21 and a second stator 22.
  • the second stator 22 has a plurality of phases of second stator coils 23 that form a rotating magnetic field.
  • the second stator coil 23 is wound around a second stator core 24 that is a stator core of the second stator 22.
  • the second rotating electrical machine 20 is a rotating field type rotating electrical machine.
  • the second rotating electrical machine 20 is an inner rotor type rotating electrical machine, and the second rotor 21 overlaps the second stator core 24 when viewed in the radial direction inside the second stator core 24 in the radial direction. Placed in position.
  • the second rotating electrical machine 20 is a permanent magnet type (in this example, an embedded permanent magnet type) synchronous rotating electrical machine, and the second rotor 21 corresponds to each of a plurality of magnetic poles.
  • One or more permanent magnets are provided.
  • the first rotor 11 and the second rotor 21 are connected to each other.
  • the first rotor 11 and the second rotor 21 are arranged coaxially. That is, in the present embodiment, the first rotor 11 and the second rotor 21 are arranged coaxially and connected to each other.
  • the direction along the axis where each of the first rotor 11 and the second rotor 21 is disposed is referred to as an axial direction L.
  • the first rotor 11 and the second rotor 21 are arranged apart from each other in the axial direction L.
  • the first rotor 11 and the second rotor 21 are connected to a common output member 94.
  • first rotating electrical machine 10 and the second rotating electrical machine 20 are provided so as to drive the common output member 94.
  • the output member 94 is disposed coaxially with the first rotor 11 and the second rotor 21 between the first rotor 11 and the second rotor 21 in the axial direction L.
  • Each of the first rotor 11 and the second rotor 21 is coupled to rotate integrally with the output member 94.
  • the first rotor 11 and the second rotor 21 are always rotated in conjunction with the output member 94 (here, integrally rotated).
  • the output member 94 is drivingly connected to the output differential gear device 92 via the counter gear mechanism 93 (connected so that the driving force can be transmitted), and the first rotating electrical machine 10 and the second rotating electrical machine.
  • the output torque 20 is transmitted to the output differential gear device 92 via the counter gear mechanism 93.
  • the torque transmitted from the output member 94 side to the output differential gear device 92 is distributed and transmitted to the two left and right axles 91 (two left and right wheels 90) via the output differential gear device 92. Is done.
  • the output member 94 may be directly driven and connected to the output differential gear device 92 (a configuration in which the respective gears mesh with each other).
  • the drive states of the first rotating electrical machine 10 and the second rotating electrical machine 20 are controlled by the inverter device 30.
  • the first rotating electrical machine 10 and the second rotating electrical machine 20 are rotating electrical machines that are driven by alternating current (three-phase alternating current in the present embodiment), and the inverter device 30 is an output terminal (first terminal 61) that outputs alternating current power. And a second terminal 62).
  • the first stator coil 13 forms a rotating magnetic field by the AC power output from the inverter device 30, whereby the first rotor 11 is rotated, and the second stator coil 23 is rotated by the AC power output from the inverter device 30. Is formed, the second rotor 21 is rotated.
  • the operating range (operating range) of the rotating electrical machine is limited by the induced voltage.
  • the relationship between the output torque (T) of the rotating electrical machine and the rotational speed (N) is as shown in FIG.
  • FIG. 4 shows operating characteristics (rotational speed-torque characteristics) in three cases where the magnitudes of the induced voltage constants (counterelectromotive force constants) are different.
  • the induced voltage constant is an induced voltage per unit rotational speed.
  • the torque constant which is the torque per unit current
  • the output torque in the low rotational speed region increases as the induced voltage constant increases, but the operable rotational speed range becomes narrow (ie, It can be seen that the upper limit of the operable rotational speed is reduced).
  • the drive device 1 includes two rotating electrical machines (the first rotating electrical machine 10 and the second rotating electrical machine 20) so that the rotors are connected to each other.
  • the drive states of these two rotating electric machines are switchable. This makes it possible to switch the operating characteristics of the rotating electrical machine to an appropriate one at that time. As a result, the output torque can be improved in the low rotational speed region, and the rotational speed range in which the operation can be performed without reducing the efficiency. It is possible to achieve coexistence with expanding to a high rotational speed side.
  • the configuration of the drive device 1 according to the present embodiment for enabling such coexistence will be described.
  • the driving device 1 includes a control device 40 that switches the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20.
  • the drive device 1 includes a switching device 50 that switches an electrical connection path between each of the first rotating electrical machine 10 and the second rotating electrical machine 20 and the inverter device 30, and the control device 40 includes the inverter device 30 and the switching device. By controlling the device 50, the driving states of the first rotating electrical machine 10 and the second rotating electrical machine 20 are switched.
  • the inverter device 30 includes an inverter circuit 31 configured using a plurality of switching elements 35, and the control device 40 performs switching control of the plurality of switching elements 35 individually via a drive circuit, whereby the inverter device AC power is output from the 30 output terminals (the first terminal 61 and the second terminal 62).
  • the control device 40 is constructed using a logic circuit such as a microcomputer as a core member, and each function of the control device 40 is realized by cooperation of hardware such as a microcomputer and software (program).
  • the control device 40 may be configured by a set of a plurality of hardware (a plurality of separated hardware) that can communicate with each other. In the present embodiment, the control device 40 corresponds to a “switching control unit”.
  • the serial drive state, the parallel drive state, and the single drive state are defined as follows. That is, the state in which both the first rotating electrical machine 10 and the second rotating electrical machine 20 are driven by the inverter device 30 in a state where the first stator coil 13 and the second stator coil 23 are electrically connected in series for each phase. In a serial drive state. The first stator coil 13 and the second stator coil 23 are electrically connected in parallel for each phase, and the inverter device 30 drives both the first rotating electrical machine 10 and the second rotating electrical machine 20. In a parallel drive state. Further, a state in which one (only one) of the first rotating electrical machine 10 and the second rotating electrical machine 20 is driven by the inverter device 30 is referred to as a single driving state.
  • the control device 40 switches the driving state of the first rotating electric machine 10 and the second rotating electric machine 20 to a series driving state, at least one of a parallel driving state and a single driving state.
  • the control device 40 switches the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 between a series driving state and a single driving state.
  • the control device 40 sets the drive states of the first rotating electrical machine 10 and the second rotating electrical machine 20 to the series driving state, the single driving state for driving the first rotating electrical machine 10, and the second rotating electrical machine 20. It switches to the single drive state to drive.
  • the switching device 50 includes a first switch 51 and a second switch 52.
  • the inverter device 30 includes a pair of output terminals (first terminal 61 and second terminal 62) corresponding to each phase.
  • the state of the 1st switch 51 is the state which electrically connects the 1st terminal 61 and the 3rd terminal 63 according to the switching signal produced
  • the state of the second switch 52 is such that the second terminal 62 and the fourth terminal 64 are electrically connected in accordance with the switching signal generated by the control device 40, and the second terminal 62 and the fifth terminal.
  • the switch provided in the switching device 50 is, for example, a semiconductor switch, a mechanical switch (such as an electromagnetic contactor), or the like.
  • the control device 40 When switching the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 to the serial driving state, the control device 40 changes the state of the first switch 51 to the first terminal 61 and the first driving state as shown in FIG. While switching to the state in which the three terminals 63 are electrically connected, the state of the second switch 52 is switched to the state in which the second terminal 62 and the fifth terminal 65 are electrically connected.
  • the electrical connection state between the 1st stator coil 13 and the 2nd stator coil 23, and a pair of output terminal (the 1st terminal 61 and the 2nd terminal 62) of the inverter apparatus 30 is the 1st stator coil 13 and It is switched to a state where a pair of output terminals of the inverter device 30 are connected to both ends of a series circuit in which the second stator coil 23 is electrically connected in series.
  • the control device 40 controls the inverter device 30 so that AC power is supplied to both the first stator coil 13 and the second stator coil 23 from the pair of output terminals of the inverter device 30.
  • a series drive state is realized.
  • the control device 40 when switching the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 to the single driving state for driving the first rotating electrical machine 10, the control device 40, as shown by a solid line in FIG.
  • the state of one switch 51 is switched to a state in which the first terminal 61 and the third terminal 63 are electrically connected, and the state of the second switch 52 is electrically connected to the second terminal 62 and the fourth terminal 64. Switch to state.
  • the electrical connection state between the first stator coil 13 and the second stator coil 23 and the pair of output terminals of the inverter device 30 is such that the pair of output terminals of the inverter device 30 is at both ends of the first stator coil 13. Is switched to a connected state.
  • the control device 40 controls the inverter device 30 so that AC power is supplied from the pair of output terminals of the inverter device 30 to the first stator coil 13, thereby driving the first rotating electrical machine 10.
  • a single drive state is realized.
  • the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 is switched to the single driving state for driving the second rotating electrical machine 20, as shown by a one-dot chain line in FIG.
  • the state of the first switch 51 is switched to a state in which the first terminal 61 and the fourth terminal 64 are electrically connected, and the state of the second switch 52 is electrically connected to the second terminal 62 and the fifth terminal 65. Switch to the state you want.
  • the electrical connection state between the first stator coil 13 and the second stator coil 23 and the pair of output terminals of the inverter device 30 is such that the pair of output terminals of the inverter device 30 is at both ends of the second stator coil 23.
  • the control device 40 controls the inverter device 30 so that AC power is supplied from the pair of output terminals of the inverter device 30 to the second stator coil 23, thereby driving the second rotating electrical machine 20.
  • a single drive state is realized.
  • the induced voltage constant of the sum of the induced voltage constant of the first rotating electrical machine 10 and the induced voltage constant of the second rotating electrical machine 20 is set from the viewpoint of operation characteristics (rotational speed-torque characteristics). It can be regarded as a state in which one rotating electric machine having the same is driven. Therefore, for example, as shown in FIG.
  • the operation in the series drive state is performed.
  • the characteristic is the first characteristic A1. That is, in the serial drive state, a larger torque can be output to the output member 94 than in the single drive state.
  • the output torque when the first rotating electrical machine 10 is driven alone and the second rotation Torque corresponding to the sum of the output torque when the electric machine 20 is driven alone can be output to the output member 94.
  • the series drive state has an induced voltage constant that is the sum of the induced voltage constant of the first rotating electrical machine 10 and the induced voltage constant of the second rotating electrical machine 20 from the viewpoint of operating characteristics. Since it can be regarded as a state in which two rotating electric machines are driven, in the series driving state, when the first rotating electric machine 10 is driven alone or when the second rotating electric machine 20 is driven alone, the rotor rotates. The induced voltage generated increases. As a result, the range of the rotational speed that can be operated in the serial drive state (see the first characteristic A1 in FIG. 4) is the range of the rotational speed that can be operated in the single drive state that drives the first rotating electrical machine 10 (see FIG. 4). The second characteristic A2) and the range of the rotational speed in which the second rotating electrical machine 20 can be operated in the single drive state (see the third characteristic A3 in FIG. 4) are narrower.
  • the control device 40 switches the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 to the series driving state, and performs the target rotation.
  • the speed is equal to or higher than the first threshold N1
  • the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 is switched to the parallel driving state or the single driving state.
  • the control device 40 switches the drive state to the single drive state when the target rotation speed is equal to or higher than the first threshold value N1.
  • the target rotation speed is the rotation speed of the first rotor 11 or the second rotor 21.
  • the drive device 1 includes a rotation sensor 41 that detects a target rotation speed, and the control device 40 is configured to acquire detection information of the rotation sensor 41. ing.
  • a resolver can be used as the rotation sensor 41.
  • the drive device 1 may not include the rotation sensor 41, and the control device 40 may be configured to detect the target rotation speed without a sensor.
  • the control device 40 switches the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 to the serial driving state, and the target rotational speed is set to the first rotational speed.
  • the threshold value is equal to or greater than N1
  • the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 is switched to the single driving state, so that an operating characteristic capable of outputting a larger torque in the low rotational speed region.
  • the high rotation speed region it is possible to switch to operation characteristics that can be operated up to the high rotation speed side without reducing the efficiency.
  • the first threshold value N1 is a rotational speed at which the boundary line of the first characteristic A1 and the boundary line of the second characteristic A2, for example, as shown in FIG. Then, it is preferable to set the rotation speed at which the magnitude of the maximum torque that can be output is equal in the single drive state in which the first rotating electrical machine 10 is driven.
  • the first rotating electrical machine 10 and the second rotating electrical machine 20 have different induced voltage constants.
  • the first rotating electrical machine 10 is a rotating electrical machine having an induced voltage constant larger than that of the second rotating electrical machine 20. Therefore, as shown in FIG. 4, in the low rotational speed region where the rotational speed (N) is low, the first rotating electrical machine 10 (see the second characteristic A2) is more than the second rotating electrical machine 20 (see the third characteristic A3). A large torque (T) can be output.
  • the range of the operable rotational speed is wider in the second rotating electrical machine 20 than in the first rotating electrical machine 10 (that is, the upper limit of the operable rotational speed is increased).
  • the control device 40 drives the first rotating electrical machine 10 when the target rotational speed is less than the second threshold value N2 that is greater than the first threshold value N1.
  • the second rotating electrical machine 20 is driven when the target rotation speed is equal to or higher than the second threshold N2.
  • the second threshold value N2 is a rotational speed at which the boundary line of the second characteristic A2 and the boundary line of the third characteristic A3 intersect, that is, a single driving the first rotating electrical machine 10 as in the example shown in FIG. It is preferable to set the rotational speed at which the magnitude of the maximum torque that can be output is equal between the drive state and the single drive state in which the second rotating electrical machine 20 is driven.
  • the induced voltage constant of the rotating electric machine can be adjusted by the length of the stator core in the axial direction L. That is, under the condition that the stator core faces the rotor (rotor core) over the entire region in the axial direction L, the area of the surface facing the rotor (cylindrical surface) in the stator core is proportional to the length of the stator core in the axial direction L. To do. Therefore, in a simplified manner, by increasing the length of the stator core in the axial direction L, the induced voltage constant of the rotating electrical machine can be increased in proportion to the length of the stator core in the axial direction L.
  • the induced voltage constant of the rotating electrical machine can be adjusted by the diameter of the surface of the stator core facing the rotor (diameter in the cross section orthogonal to the axial direction L). That is, the area of the facing surface (cylindrical surface) is proportional to the square of the diameter (radius) of the facing surface. Therefore, when considered simply, by increasing the radius of the facing surface, the induced voltage constant of the rotating electrical machine can be increased in proportion to the square of the radius.
  • the current density can be increased as the radius of the facing surface increases, so that the induced voltage constant of the rotating electrical machine can be increased in proportion to the cube of the radius. is there.
  • the induced voltage constant of the rotating electrical machine can be adjusted by the number of turns of the stator coil.
  • the induced voltage is proportional to the number of turns of the coil (the number of turns per unit length). Therefore, when considered simply, by increasing the number of turns of the stator coil, the induced voltage constant of the rotating electrical machine is proportional to the number of turns of the stator coil. Can be increased.
  • the first rotating electrical machine 10 and the second rotating electrical machine 20 are configured such that the length of the first stator core 14 in the axial direction L and the length of the second stator core 24 in the axial direction L, the first rotor 11 in the first stator core 14. And the diameter of the opposing surface (second opposing surface 25) of the second stator core 24 to the second rotor 21 and the number of turns of the first stator coil 13 and the second stator coil.
  • the induced voltage constant can be made different between the first rotating electrical machine 10 and the second rotating electrical machine 20.
  • the first rotating electrical machine 10 and the second rotating electrical machine 10 are configured differently in the axial direction L length of the first stator core 14 and the axial length L of the second stator core 24.
  • the magnitude of the induced voltage constant is different from that of the rotating electrical machine 20.
  • the length of the first stator core 14 in the axial direction L is about twice the length of the second stator core 24 in the axial direction L, and the length of the first rotor 11 in the axial direction L is adjusted accordingly.
  • the induced voltage constant of the first rotating electrical machine 10 is set to about twice the induced voltage constant of the second rotating electrical machine 20.
  • the inverter circuit 31 is a circuit that converts electric power between DC power and plural-phase (three-phase in this embodiment) AC power.
  • the inverter circuit 31 converts the DC power supplied from the DC power source 33 into AC power and supplies it to the stator coil.
  • a smoothing capacitor 34 for smoothing the voltage between the positive and negative electrodes is disposed on the DC side of the inverter circuit 31.
  • the inverter device 30 is configured to supply AC power to each of the first stator coil 13 and the second stator coil 23 by a common inverter circuit 31. That is, the output terminals (in this embodiment, the first terminal 61 and the second terminal 62) for outputting AC power connected to the inverter circuit 31 are connected to the first stator coil 13 and the second for each phase. Common to the stator coil 23.
  • the inverter circuit for supplying AC power to the first stator coil 13 is configured by supplying AC power from the common inverter circuit 31 to each of the first stator coil 13 and the second stator coil 23.
  • the inverter circuit 30 for supplying AC power to the second stator coil 23 compared with the case where the inverter circuit 30 is separately provided, and the inverter device 30 can be downsized and the loss of the entire inverter device 30 can be reduced. Is possible.
  • the first rotating electrical machine 10 and the second rotating electrical machine 20 are rotating electrical machines driven by a three-phase alternating current. Therefore, the first stator 12 includes a first U-phase coil 13u that is a first stator coil 13 for U-phase, a first V-phase coil 13v that is a first stator coil 13 for V-phase, and a W-phase stator.
  • the first stator coil 13 includes a first W-phase coil 13w
  • the second stator 22 includes a second U-phase coil 23u that is a U-phase second stator coil 23 and a V-phase second stator.
  • a second V-phase coil 23v that is the coil 23 and a second W-phase coil 23w that is the second stator coil 23 for the W phase are included.
  • the first stator coil 13 and the second stator coil 23 are electrically connected in series.
  • alternating current power is supplied from the common 1st terminal 61 and the 2nd terminal 62 with respect to each of the 1st stator coil 13 and the 2nd stator coil 23 which were mutually connected in series. Note that the supply state of AC power to the first stator coil 13 and the second stator coil 23 connected in series with each other is the first provided in the switching device 50 as described above with reference to FIGS. 2 and 3.
  • the AC power is supplied to both the first stator coil 13 and the second stator coil 23, and the AC power is supplied only to the first stator coil 13. And a state in which AC power is supplied only to the second stator coil 23.
  • FIG. 5 except the switching device 50 corresponding to the U phase is shown in a simplified manner, the switching device 50 is provided in each phase.
  • the inverter device 30 includes a full bridge circuit 32 (single-phase inverter circuit) corresponding to each phase.
  • the full bridge circuit 32 converts the DC power supplied from the DC power supply 33 into single-phase AC power, and supplies the single-phase AC power to the corresponding first stator coil 13 and second stator coil 23.
  • the inverter device 30 includes three full bridge circuits 32 for U phase, V phase, and W phase, and the control device 40 receives single-phase AC power having different phases from each other. The switching operations of the three full bridge circuits 32 are controlled so as to be supplied to the stator coils. In FIG. 5, parts other than the full bridge circuit 32 corresponding to the U phase are shown in a simplified manner.
  • the full bridge circuit 32 is configured by electrically connecting two half bridge circuits in parallel, and each half bridge circuit is configured by a series circuit of two switching elements 35. .
  • a free wheel diode 36 is connected in parallel to each of the switching elements 35.
  • the first terminal 61 is electrically connected to the connection point of the two switching elements 35 in one half bridge circuit, and the second terminal 61 is connected to the connection point of the two switching elements 35 in the other half bridge circuit.
  • Terminal 62 is electrically connected.
  • the control device 40 individually controls switching of the plurality of switching elements 35 included in the full bridge circuit 32 so that an AC voltage is generated between the first terminal 61 and the second terminal 62.
  • FIG. 5 illustrates an example in which an IGBT (Insulated Gate Bipolar Transistor) is used as the switching element 35, but a MOSFET (Metal Oxide Semiconductor Semiconductor Field Effect Transistor) or the like may be used as the switching element 35.
  • IGBT Insulated Gate Bipolar Transistor
  • MOSFET Metal Oxide Semiconductor Semiconductor Field Effect Transistor
  • the inverter device 30 includes the full bridge circuit 32 corresponding to each phase, so that AC power can be independently supplied to the stator coil of each phase.
  • stator coils of different phases are electrically connected, such as star connection or delta connection, and AC power is supplied to the stator coils of each phase.
  • a switch for switching the connection state between the stator coils of different phases for example, a switch for switching the formation position of the neutral point
  • the configuration of the switching device 50 becomes complicated, such as being necessary for switching the driving state.
  • FIGS. 1 A second embodiment of the drive device will be described with reference to FIGS.
  • This embodiment differs from the first embodiment in that the control device 40 switches the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 between a series driving state and a parallel driving state.
  • the drive device 1 of this embodiment is demonstrated centering around difference with 1st embodiment. The points not particularly specified are the same as those in the first embodiment, and the same reference numerals are given and detailed description thereof is omitted.
  • the switching device 50 includes a third switch 53 and a fourth switch 54.
  • the state of the third switch 53 is based on the state in which the sixth terminal 66 and the second terminal 62 are electrically connected in accordance with the switching signal generated by the control device 40, and the sixth terminal 66 and the seventh terminal 67. Can be switched to an electrically connected state.
  • the state of the fourth switch 54 is such that the ninth terminal 69 and the first terminal 61 are electrically connected in accordance with the switching signal generated by the control device 40, and the ninth terminal 69 and the eighth terminal. 68 can be switched to a state of being electrically connected to 68.
  • one end of the first stator coil 13 is electrically connected to the first terminal 61 that is one of the pair of output terminals (the first terminal 61 and the second terminal 62) of the inverter device 30. While being connected, one end of the second stator coil 23 is electrically connected to a second terminal 62 that is the other of the pair of output terminals of the inverter device 30.
  • the end of the first stator coil 13 opposite to the side connected to the first terminal 61 is electrically connected to the sixth terminal 66 and connected to the second terminal 62 of the second stator coil 23.
  • the end on the side opposite to the side to be connected is electrically connected to the ninth terminal 69.
  • the seventh terminal 67 and the eighth terminal 68 are electrically connected.
  • the control device 40 changes the state of the third switch 53 to the sixth terminal 66 and the seventh driving state as shown in FIG. While switching to a state in which the terminal 67 is electrically connected, the state of the fourth switch 54 is switched to a state in which the ninth terminal 69 and the eighth terminal 68 are electrically connected.
  • the electrical connection state between the first stator coil 13 and the second stator coil 23 and the pair of output terminals of the inverter device 30 is such that the first stator coil 13 and the second stator coil 23 are electrically in series.
  • the control device 40 controls the inverter device 30 so that AC power is supplied to both the first stator coil 13 and the second stator coil 23 from the pair of output terminals of the inverter device 30.
  • a series drive state is realized.
  • the control device 40 changes the state of the third switch 53 to the sixth terminal 66 as shown in FIG. While switching to a state in which the second terminal 62 is electrically connected, the state of the fourth switch 54 is switched to a state in which the ninth terminal 69 and the first terminal 61 are electrically connected.
  • the electrical connection state between the first stator coil 13 and the second stator coil 23 and the pair of output terminals of the inverter device 30 is such that the first stator coil 13 and the second stator coil 23 are electrically in parallel.
  • the control device 40 controls the inverter device 30 so that AC power is supplied to both the first stator coil 13 and the second stator coil 23 from the pair of output terminals of the inverter device 30.
  • a parallel drive state is realized.
  • two rotary electric machines having the same characteristics are used as the first rotary electric machine 10 and the second rotary electric machine 20.
  • two rotating electrical machines have the same characteristics as each other are that the induced voltage constant, the stator coil resistance (winding resistance), and the stator coil inductance are the same or equivalent between the two rotating electrical machines. It means that there is.
  • the series drive state is an induction of the magnitude of the sum of the induced voltage constant of the first rotating electrical machine 10 and the induced voltage constant of the second rotating electrical machine 20 from the viewpoint of operating characteristics (rotational speed-torque characteristics). It can be regarded as a state in which one rotating electrical machine having a voltage constant is driven. Therefore, as shown schematically in FIG. 8, the operation characteristic in the series drive state (fourth characteristic A4) and the operation characteristic in the parallel drive state (fifth characteristic A5) can be operated in the parallel drive state.
  • the rotational speed range is wider than the operable rotational speed range in the serial drive state, while the output torque in the low rotational speed region is larger in the serial drive state than in the parallel drive state.
  • the control device 40 changes the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 to the series driving state.
  • the switching and target rotational speed is equal to or higher than the first threshold N1
  • the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 is switched to the parallel driving state.
  • the first threshold N1 is, for example, as shown in FIG. 8, the rotational speed at which the boundary line of the fourth characteristic A4 and the boundary line of the fifth characteristic A5 intersect, that is, in the series driving state and the parallel driving state. It is possible to set the rotation speed at which the maximum torque that can be output is equal.
  • the control device 40 drives the first rotating electrical machine 10 when the target rotational speed is less than the second threshold N2, and the target rotational speed is the second.
  • the configuration in which the second rotating electrical machine 20 is driven when the threshold value N2 or more has been described as an example.
  • the control device 40 does not depend on the target rotational speed, but only one of the first rotating electrical machine 10 and the second rotating electrical machine 20. It can also be set as the structure driven.
  • the control apparatus 40 demonstrates as an example the structure which switches the drive state of the 1st rotary electric machine 10 and the 2nd rotary electric machine 20 to a serial drive state and a single drive state
  • the control apparatus 40 demonstrated as an example the structure which switches the drive state of the 1st rotary electric machine 10 and the 2nd rotary electric machine 20 to a serial drive state and a parallel drive state.
  • the control device 40 switches the drive state of the first rotating electrical machine 10 and the second rotating electrical machine 20 between a series drive state, a parallel drive state, and a single drive state. You can also
  • control device 40 switches the driving states of the first rotating electrical machine 10 and the second rotating electrical machine 20 based on the target rotational speed.
  • control device 40 is not limited to such a configuration, and the control device 40 determines the driving state of the first rotating electrical machine 10 and the second rotating electrical machine 20 in addition to the target rotational speed (for example, at that time). It is also possible to adopt a configuration in which switching is performed based on the magnitude of the output torque to be performed. Moreover, it can also be set as the structure which the control apparatus 40 switches the drive state of the 1st rotary electric machine 10 and the 2nd rotary electric machine 20 irrespective of object rotation speed.
  • the 1st rotary electric machine 10 and 2nd rotation are made into the structure from which the length of the axial direction L of the 1st stator core 14 differs from the length of the axial direction L of the 2nd stator core 24.
  • the configuration in which the magnitude of the induced voltage constant is different from that of the electric machine 20 has been described as an example.
  • the diameter of the facing surface (first facing surface 15) of the first stator core 14 to the first rotor 11 and the facing surface of the second stator core 24 to the second rotor 21 are configured such that the diameter of the second facing surface 25) is different, or the number of turns of the first stator coil 13 and the number of turns of the second stator coil 23 are different.
  • the induced voltage constant may be different from that of 20.
  • An example of the former is shown in FIG.
  • the first rotating electrical machine 10 has a larger induced voltage constant than the second rotating electrical machine 20 by making the diameter of the first facing surface 15 larger than the diameter of the second facing surface 25.
  • a plurality of parameters in the axial length L of the stator core, the diameter of the surface facing the rotor in the stator core, and the number of turns of the stator coil are different between the first rotating electrical machine 10 and the second rotating electrical machine 20. May be allowed.
  • the configuration in which the inverter device 30 includes the full bridge circuit 32 corresponding to each phase has been described as an example.
  • the inverter device 30 includes a half-bridge circuit corresponding to each phase, and in a state where stator coils of different phases are electrically connected to each other, It can also be set as the structure by which alternating current power is supplied to a stator coil.
  • the configuration in which the inverter device 30 supplies AC power to the first stator coil 13 and the second stator coil 23 by the common inverter circuit 31 has been described as an example.
  • the inverter device 30 is not limited to such a configuration, and the inverter device 30 supplies AC power to the first stator coil 13 and the inverter circuit supplies AC power to the second stator coil 23. Can also be provided separately.
  • the inverter device 30 includes an inverter circuit for supplying AC power to the first stator coil 13 and an inverter circuit for supplying AC power to the second stator coil 23, the single drive state is provided. 1, it is possible to control the output torque of a rotating electrical machine that is not a driving target of the first rotating electrical machine 10 and the second rotating electrical machine 20 (hereinafter referred to as “non-driving target rotating electrical machine”). In this way, when the output torque of the non-drive target rotating electrical machine can be controlled in the single drive state, the control device 40 ensures that the output torque of the non-drive target rotary electrical machine becomes zero in the single drive state (substantially).
  • the control device 40 can be configured to perform zero torque control (zero Newton control) in the single drive state.
  • the “output torque of the non-driven target rotating electrical machine” means torque output (transmitted) from the driven rotating electrical machine to a specific rotating member
  • this “specific rotating member” is, for example, It can be a rotor shaft of a non-drive target rotating electrical machine or a rotating member (for example, an output member 94) on the wheel 90 side in the power transmission path from the rotor shaft.
  • the control device 40 performs zero torque control as described above, it is possible to reduce a loss (a dragging loss) associated with the rotation of the non-driven target rotating electrical machine in the single drive state. That is, in the single drive state, drag torque is generated when an induced voltage (counterelectromotive voltage) is generated in the non-driven target rotating electrical machine, that is, when the non-driven target rotating electrical machine outputs negative torque (regenerative torque). Can do. In the single drive state, drag torque can also be generated by mechanical friction in a bearing or the like. In the zero torque control, by controlling the output torque of the non-driven target rotating electrical machine to be zero (substantially zero), the drag torque can be reduced and drag loss can be reduced. In the case of vector control of the non-drive target rotating electrical machine, for example, the output torque of the non-drive target rotating electrical machine is controlled to be zero by adjusting the magnitude and phase of the current.
  • rotation and driving force are selectively applied to the power transmission path between the first rotor 11 and the output member 94 and the power transmission path between the second rotor 21 and the output member 94.
  • a configuration in which no clutch is provided for transmission is described.
  • at least one of the first rotor 11 and the output member 94 and the second rotor 21 and the output member 94 are connected via the clutch 70. It can also be configured. In such a configuration, the rotor connected to the output member 94 via the clutch 70 can be disconnected when the rotating electrical machine having the rotor is not driven, so that energy loss due to rotation of the rotor can be suppressed. it can.
  • the above-described target rotational speed that is the rotational speed of the second rotor 21 is the rotational speed of the rotor (one or both rotors) that rotates integrally with the output member 94 of the first rotor 11 and the second rotor 21.
  • FIG. 9 shows an example of such a configuration.
  • a clutch 70 (first clutch 71) is provided in the power transmission path between the first rotor 11 and the output member 94, and the power between the second rotor 21 and the output member 94.
  • a clutch 70 (second clutch 72) is provided in the transmission path, and both the first rotor 11 and the output member 94 and the second rotor 21 and the output member 94 are connected via the clutch 70. ing.
  • both the first clutch 71 and the second clutch 72 are engaged, and in the single drive state that drives the first rotating electrical machine 10, the first clutch 71 is engaged and the second clutch.
  • the first clutch 71 In the single drive state in which 72 is released and the second rotating electrical machine 20 is driven, the first clutch 71 is released and the second clutch 72 is engaged.
  • the clutch 70 for example, a friction engagement device or a meshing engagement device can be used.
  • both the first rotating electrical machine 10 and the second rotating electrical machine 20 are inner rotor type rotating electrical machines
  • one or both of the first rotating electrical machine 10 and the second rotating electrical machine 20 may be an outer rotor type rotating electrical machine.
  • the configuration in which the first rotor 11 and the second rotor 21 are arranged on the same axis has been described as an example.
  • the configuration is not limited to such a configuration, and the first rotor 11 and the second rotor 21 may be arranged on different axes.
  • the output member 94 to which driving force is transmitted from both the first rotor 11 and the second rotor 21 is arranged coaxially with either the first rotor 11 or the second rotor 21.
  • the output member 94 may be configured to be arranged on a different axis from both the first rotor 11 and the second rotor 21.
  • the drive device 1 is applied to a vehicle drive device.
  • the drive device according to the present disclosure is not limited to a vehicle drive device, and a rotating electrical machine is used as a power source. It is possible to apply to any drive device in which is used.
  • a drive device comprising a first rotating electrical machine (10) and a second rotating electrical machine (20), and an inverter device (30) for driving the first rotating electrical machine (10) and the second rotating electrical machine (20).
  • the first rotating electrical machine (10) includes a first rotor (11) and a first stator (12) having a plurality of first stator coils (13) forming a rotating magnetic field.
  • the second rotating electrical machine (20) includes a second rotor (21) and a second stator (22) having a second stator coil (23) having a plurality of phases forming a rotating magnetic field.
  • the one rotor (11) and the second rotor (21) are coaxially arranged and connected to each other, and the first stator coil (13) and the second stator coil (23) are phase-by-phase.
  • the first rotating power is electrically connected in series. (10) and the second rotating electric machine (20) are driven in series by the inverter device (30), and the first stator coil (13) and the second stator coil (23)
  • a state in which both the first rotating electrical machine (10) and the second rotating electrical machine (20) are driven by the inverter device (30) while being electrically connected in parallel for each phase is referred to as a parallel drive state
  • a state in which one of the first rotating electrical machine (10) and the second rotating electrical machine (20) is driven by the inverter device (30) is defined as a single driving state
  • the first rotating electrical machine (10) and the second rotating electrical machine ( And 20) a switching control unit (40) that switches the driving state between the series driving state and at least one of the parallel driving state and the single driving state.
  • the first rotating electrical machine (10) and the second stator coil (13) and the second stator coil (23) are electrically connected in series for each phase. Since both of the two rotating electric machines (20) are driven by the inverter device (30), the first rotating electric machine (10) and the second rotating electric machine (20) are realized in a state where the driving state is switched to the serial driving state.
  • the operating characteristics are the same as the operating characteristics of one rotating electrical machine having an induced voltage constant of the sum of the induced voltage constant of the first rotating electrical machine (10) and the induced voltage constant of the second rotating electrical machine (20). It becomes.
  • the operation characteristics according to the induced voltage constants of the first rotating electrical machine (10) and the second rotating electrical machine (20) are obtained. Therefore, the variable range of the operating characteristics by switching the driving state of the first rotating electric machine (10) and the second rotating electric machine (20) between the series driving state and the parallel driving state or the single driving state is the first rotating electric machine. According to the induced voltage constant of (10) and the induced voltage constant of the second rotating electrical machine (20).
  • the induced voltage constant of the first rotating electrical machine (10) and the induced voltage constant of the second rotating electrical machine (20) can be basically set independently of each other. As a result, according to the above configuration, it is possible to realize the drive device (1) that can easily secure the design freedom of the variable width of the operation characteristics.
  • the switching control unit (40) When the driving state is switched to the serial driving state and the target rotational speed is equal to or higher than the first threshold (N1), it is preferable to switch the driving state to the parallel driving state or the single driving state.
  • the operating characteristic realized in the series drive state is one rotating electrical machine having an induced voltage constant that is the sum of the induced voltage constant of the first rotating electrical machine (10) and the induced voltage constant of the second rotating electrical machine (20). Therefore, the operation characteristics realized in the series drive state can output a larger torque in the low rotation speed region than the operation characteristics realized in the parallel drive state or the single drive state. In addition, the efficiency is low in the high rotational speed region. According to the above configuration, in consideration of this point, it is possible to switch the operating characteristic of the driving device (1) to an appropriate one according to the target rotational speed at that time.
  • the switching control unit (40) switches the drive state to the parallel drive state or the single drive state when the target rotational speed is equal to or higher than the first threshold (N1).
  • the first rotating electrical machine (10) has an induced voltage constant larger than that of the second rotating electrical machine (20), and the switching control unit (40) has the target rotational speed equal to or higher than the first threshold (N1).
  • the drive state is switched to the single drive state, and in the single drive state, the target rotational speed is less than a second threshold (N2) greater than the first threshold (N1).
  • N2 second threshold
  • the operation realized when the first rotating electrical machine (10) is driven in the single drive state when the first rotating electrical machine (10) has a larger induced voltage constant than the second rotating electrical machine (20), the operation realized when the first rotating electrical machine (10) is driven in the single drive state.
  • the characteristic is that a large torque can be output in the low rotational speed region and the efficiency is low in the high rotational speed region, compared to the operating characteristic realized when the second rotating electrical machine (20) is driven in the single drive state. It becomes a characteristic.
  • the operating characteristic of the drive device (1) in the rotational speed region equal to or higher than the first threshold value (N1), the operating characteristic of the drive device (1) is made appropriate according to the target rotational speed at that time. It is possible to switch.
  • the operation characteristic in the rotation speed region of the first threshold value (N1) or higher, the operation characteristic is switched to output a larger torque in the low rotation speed region, and the efficiency is not decreased in the high rotation speed region.
  • a drive device comprising a first rotating electrical machine (10) and a second rotating electrical machine (20), and an inverter device (30) for driving the first rotating electrical machine (10) and the second rotating electrical machine (20).
  • the first rotating electrical machine (10) includes a first rotor (11) and a first stator (12) having a plurality of first stator coils (13) forming a rotating magnetic field.
  • the second rotating electrical machine (20) includes a second rotor (21) and a second stator (22) having a second stator coil (23) having a plurality of phases forming a rotating magnetic field.
  • the first rotor (11) and the second rotor (21) are connected to each other, and the first rotating electric machine (10) and the second rotating electric machine (20) are different from each other in induced voltage constants.
  • the state in which one of the first rotating electrical machine (10) and the second rotating electrical machine (20) is driven by the inverter device (30) is defined as a single driving state, and the first rotating electrical machine (10) and the second rotating electrical machine are driven.
  • a switching control unit (40) for switching the drive state of the electric machine (20) between the series drive state and the single drive state is provided.
  • the first rotating electrical machine (10) and the second stator coil (13) and the second stator coil (23) are electrically connected in series for each phase. Since both of the two rotating electric machines (20) are driven by the inverter device (30), the first rotating electric machine (10) and the second rotating electric machine (20) are realized in a state where the driving state is switched to the serial driving state.
  • the operating characteristics are the same as the operating characteristics of one rotating electrical machine having an induced voltage constant of the sum of the induced voltage constant of the first rotating electrical machine (10) and the induced voltage constant of the second rotating electrical machine (20). It becomes.
  • the operation characteristics correspond to the induced voltage constants of the first rotating electrical machine (10) and the second rotating electrical machine (20).
  • variable range of the operating characteristics by switching the driving state of the first rotating electrical machine (10) and the second rotating electrical machine (20) between the series driving state and the single driving state is that of the first rotating electrical machine (10). It depends on the induced voltage constant and the induced voltage constant of the second rotating electrical machine (20).
  • the induced voltage constant of the first rotating electrical machine (10) and the induced voltage constant of the second rotating electrical machine (20) can be basically set independently of each other. As a result, according to the above configuration, it is possible to realize the drive device (1) that can easily secure the design freedom of the variable width of the operation characteristics.
  • the output torque of the rotating electrical machine that is not the driving target of the first rotating electrical machine (10) and the second rotating electrical machine (20) is zero. It is preferable to control so that
  • a drive device comprising a first rotating electrical machine (10) and a second rotating electrical machine (20), and an inverter device (30) for driving the first rotating electrical machine (10) and the second rotating electrical machine (20).
  • the first rotating electrical machine (10) includes a first rotor (11) and a first stator (12) having a plurality of first stator coils (13) forming a rotating magnetic field.
  • the second rotating electrical machine (20) includes a second rotor (21) and a second stator (22) having a second stator coil (23) having a plurality of phases forming a rotating magnetic field.
  • the one rotor (11) and the second rotor (21) are arranged side by side on the same axis and connected to each other, and the inverter device (30) is connected to the first stator coil (31) by a common inverter circuit (31). 13) and the second stator Supplying AC power to the respective yl (23).
  • AC power can be supplied from the common inverter circuit (31) to each of the first stator coil (13) and the second stator coil (23).
  • the first stator coil (13) and the second stator coil When a series circuit with (23) is formed, it becomes easy to supply AC power between both ends of the series circuit. Therefore, both the first rotating electrical machine (10) and the second rotating electrical machine (20) are in a state where the first stator coil (13) and the second stator coil (23) are electrically connected in series for each phase. It is also easy to realize a series drive state driven by the inverter device (30).
  • the drive device (1) that can easily secure the design flexibility of the variable width of the operation characteristics. It can be realized.
  • the inverter circuit for supplying alternating current power to a 1st stator coil (13) and the inverter circuit for supplying alternating current power to a 2nd stator coil (23) are provided separately, respectively. Compared to the case, it is possible to reduce the size of the inverter device (30) and to reduce the loss of the entire inverter device (30).
  • the first rotating electrical machine (10) and the second rotating electrical machine (20) are the first stator core (14) that is the stator core of the first stator (12).
  • the axial direction (L) length, the axial direction (L) length of the second stator core (24), which is the stator core of the second stator (22), and the first rotor (11) in the first stator core (14) The diameter of the opposing surface (15), the diameter of the opposing surface (25) of the second stator core (24) with the second rotor (21), the number of turns of the first stator coil (13), and the second stator coil It is preferable that at least one of the number of turns of (23) is different.
  • the space between the first rotating electrical machine (10) and the second rotating electrical machine (20) is taken into consideration in consideration of the arrangement space limitation of the first rotating electrical machine (10) and the second rotating electrical machine (20).
  • the parameters that can be easily varied in the above are selected from among the three parameters, and the induced voltage constant can be varied between the first rotating electrical machine (10) and the second rotating electrical machine (20).
  • the first rotating electrical machine (10) and the second rotating electrical machine (20) are different. It is also easy to ensure a large difference in induced voltage constants.
  • the first rotor (11) and the second rotor (21) are connected to a common output member (94), and between the first rotor (11) and the output member (94), and It is preferable that at least one of the second rotor (21) and the output member (94) is connected via a clutch (70).
  • the rotor (11, 21) connected to the output member (94) via the clutch (70) is not driven when the rotating electrical machine (10, 20) having the rotor (11, 21) is not driven. Since it can be separated, energy loss due to the accompanying rotation of the rotor (11, 21) can be suppressed.
  • the inverter device (30) preferably includes a full bridge circuit (32) corresponding to each phase.
  • AC power is independently supplied to the stator coils (13, 23) of each phase without electrically connecting the stator coils of different phases like star connection or delta connection. Can do. Therefore, the driving state of the first rotating electrical machine (10) and the second rotating electrical machine (20) can be switched without using a switch for switching the connection state between stator coils of different phases, and such a switch is unnecessary.
  • the switching device (50) can be simplified.
  • the drive device according to the present disclosure only needs to exhibit at least one of the effects described above.
  • driving device 10 first rotating electrical machine 11: first rotor 12: first stator 13: first stator coil 14: first stator core 15: first facing surface (facing surface) 20: second rotating electrical machine 21: second rotor 22: second stator 23: second stator coil 24: second stator core 25: second facing surface (facing surface)

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Abstract

La présente invention concerne un dispositif d'entraînement comprenant une unité de commande de commutation qui commute l'état d'entraînement d'une première machine électrique tournante (10) et d'une deuxième machine électrique tournante (20) vers un état d'entraînement en série et au moins l'un d'un état d'entraînement en parallèle et d'un état d'entraînement individuel, l'état d'entraînement en série étant un état dans lequel à la fois la première machine électrique tournante (10) et la deuxième machine électrique tournante (20) sont entraînées dans un état dans lequel une première bobine de stator (13) et une deuxième bobine de stator (23) sont électriquement connectées en série pour chaque phase, l'état d'entraînement parallèle est un état dans lequel la première machine électrique tournante (10) et la deuxième machine électrique tournante (20) sont entraînées dans un état dans lequel la première bobine de stator (13) et la deuxième bobine de stator (23) sont électriquement connectées en parallèle pour chaque phase, et l'état d'entraînement individuel est un état dans lequel l'une de la première machine électrique tournante (10) et la deuxième machine électrique tournante (20) est entraînée.
PCT/JP2018/012903 2017-03-31 2018-03-28 Dispositif d'entraînement WO2018181541A1 (fr)

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Cited By (2)

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WO2020230235A1 (fr) * 2019-05-13 2020-11-19 三菱電機株式会社 Dispositif d'entraînement de charge, climatiseur, et procédé d'utilisation de dispositif d'entraînement de charge
WO2024062594A1 (fr) * 2022-09-22 2024-03-28 株式会社Subaru Système d'entraînement de moteur

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WO2020230235A1 (fr) * 2019-05-13 2020-11-19 三菱電機株式会社 Dispositif d'entraînement de charge, climatiseur, et procédé d'utilisation de dispositif d'entraînement de charge
JPWO2020230235A1 (ja) * 2019-05-13 2021-10-21 三菱電機株式会社 負荷駆動装置、空気調和機及び負荷駆動装置の運転方法
CN113812084A (zh) * 2019-05-13 2021-12-17 三菱电机株式会社 负载驱动装置、空气调节器及负载驱动装置的运行方法
US20220103096A1 (en) * 2019-05-13 2022-03-31 Mitsubishi Electric Corporation Load driving apparatus, air conditioner, and method for operating load driving apparatus
JP7170858B2 (ja) 2019-05-13 2022-11-14 三菱電機株式会社 負荷駆動装置、空気調和機及び負荷駆動装置の運転方法
WO2024062594A1 (fr) * 2022-09-22 2024-03-28 株式会社Subaru Système d'entraînement de moteur

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