WO2014188757A1 - Rotor pour machine électrique tournante, machine électrique tournante, système de pilotage électrique et véhicule électrique - Google Patents

Rotor pour machine électrique tournante, machine électrique tournante, système de pilotage électrique et véhicule électrique Download PDF

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Publication number
WO2014188757A1
WO2014188757A1 PCT/JP2014/056097 JP2014056097W WO2014188757A1 WO 2014188757 A1 WO2014188757 A1 WO 2014188757A1 JP 2014056097 W JP2014056097 W JP 2014056097W WO 2014188757 A1 WO2014188757 A1 WO 2014188757A1
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WIPO (PCT)
Prior art keywords
rotor
torque
rotating electrical
electrical machine
electric machine
Prior art date
Application number
PCT/JP2014/056097
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English (en)
Japanese (ja)
Inventor
秀俊 江夏
菊地　聡
松延　豊
知弘 安達
Original Assignee
日立オートモティブシステムズ株式会社
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Application filed by 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Priority to JP2015518124A priority Critical patent/JPWO2014188757A1/ja
Publication of WO2014188757A1 publication Critical patent/WO2014188757A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • 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

Definitions

  • the present invention relates to a rotor of a rotating electric machine, a rotating electric machine including the same, an electric drive system, and an electric vehicle.
  • Rotating electrical machines for vehicles such as drive motors for hybrid electric vehicles, require acceleration performance such as starting and overtaking, so instantaneous acceleration torque is required for the motor.
  • the energy is returned to the battery by flowing current at a phase that generates torque in the direction opposite to the rotation direction during regeneration.
  • a permanent magnet type rotating electrical machine is adopted as an electric motor to generate instantaneous torque, and a magnetic path of the rotor is set so that a large current is applied and magnetic saturation is not generated.
  • Accelerating acceleration at high speeds can be expected to assist the engine, so it is important to achieve torque at low speeds.
  • a large amount of torque is not always required because the kinetic energy of the vehicle body is small in the first place.
  • the assist it leads to a large energy loss. Therefore, it is desirable that the regenerative energy can be regenerated at high speed.
  • Patent Document 1 An example of reducing the inertia while preventing the occurrence of magnetic saturation is provided in Patent Document 1 in order to solve the problem of reducing the inertia and maintaining the torque at low speed.
  • An object of the present invention is to provide a rotor of a rotating electric machine that can improve torque characteristics while suppressing an increase in inertia of the rotating electric machine, and a rotating electric machine, an electric drive system, and an electric vehicle including the same.
  • a rotor of a rotating electrical machine including a permanent magnet or a flux barrier in a rotor core, the magnetic pole central axis of the permanent magnet,
  • the magnetic core of the magnetic circuit having the highest magnetic resistance and the line connecting the rotation center axis is d-axis
  • the rotor core is A hole is formed on the d-axis, and at least a part of the boundary line constituting the outer diameter side of the hole has a shape along the magnetic flux passing through the rotor core when the maximum torque is generated or when the minimum torque is generated. It is characterized by.
  • the rotor of a rotary electric machine which can improve a torque characteristic, suppressing the increase in inertia of a rotary electric machine, and the rotary electric machine provided with this, an electric drive system, and an electric vehicle can be provided.
  • FIG. 3 is a partially enlarged view of FIG. 2. It is the figure which showed the effect of this invention. It is the figure which showed the effect of this invention. It is a magnetic flux diagram which showed the effect of the present invention. It is the figure which showed the effect of this invention. It is a system diagram for driving a rotating electrical machine. It is a block diagram of an electric vehicle when the present invention is applied to the electric vehicle.
  • axial direction refers to a direction along the rotation axis of the rotating electrical machine.
  • the circumferential direction refers to the direction along the rotational direction of the rotating electrical machine.
  • the “radial direction” refers to a radial direction (radial direction) when the rotational axis of the rotating electrical machine is the center.
  • Inner circumference side refers to the radially inner side (inner diameter side)
  • outer circumference side refers to the opposite direction, that is, the radially outer side (outer diameter side).
  • FIG. 1 is a partial cross-sectional view of a rotating electrical machine 1 using a permanent magnet according to an embodiment of the present invention.
  • a stator 2 of a rotating electrical machine 1 using a permanent magnet includes a stator core 4 and a three-phase or multiphase stator winding 5 wound around a slot formed in the stator core 4.
  • the stator 2 is housed and held in a housing 11.
  • the rotor 3 forms a rotor core 7 provided with a magnet insertion hole 6 for inserting a permanent magnet, and a magnetic pole of the rotor inserted into the magnet insertion hole 6 formed in the rotor core 7.
  • a permanent magnet 400 and a shaft 8 are provided.
  • the shaft 8 is rotatably supported by bearings 10 on end brackets 9 fixed to both ends of the housing 11.
  • the rotating electrical machine 1 is provided with a magnetic pole position detector PS for detecting the magnetic pole position of the rotor 3.
  • the magnetic pole position detector PS is composed of, for example, a resolver.
  • a rotational speed detector E is provided for detecting the rotational speed of the rotor 3.
  • the rotational speed detector E is an encoder, and is disposed on the side of the rotor 3. The rotational speed detector E generates pulses in synchronization with the rotation of the shaft 8, and the rotational speed can be measured by counting the pulses.
  • the rotating electrical machine 1 detects the magnet position based on the signal of the magnetic pole position detector PS, detects the rotational speed based on the output signal of the rotational speed detector E, and sets the target torque of the rotating electrical machine 1 by a control device (not shown).
  • An alternating current to be generated is supplied to the stator winding 5.
  • the output torque of the rotating electrical machine is controlled by controlling the current supplied to the stator winding 5 by the control device.
  • FIG. 2 is a cross-sectional view taken along a plane perpendicular to the rotation axis of the rotating electrical machine shown in FIG. In order to avoid complication, the illustration of the housing is omitted.
  • FIG. 3 is a partially enlarged view of FIG.
  • the rotating electrical machine 1 includes a stator 2 and a rotor 3, and the stator 2 is formed over the entire circumference in the circumferential direction on the stator core 4 and the rotor side of the stator core 4.
  • the stator winding 5 wound around the slot is provided.
  • the stator core 4 has a substantially cylindrical yoke portion 21, which is also called a core back portion, and a teeth portion 22 having a shape protruding inward in the radial direction from the yoke portion 21. It is formed over the circumference.
  • the slot is formed between the adjacent tooth portions 22, and the slot accommodates and holds the stator winding.
  • a rotating magnetic field is generated in the stator by supplying a three-phase alternating current to the stator windings arranged over the entire circumference. Further, a magnetic flux generated by a rotor described later is linked to the stator winding, and an induced voltage is generated in the stator winding by changing the linkage flux by rotating the rotor.
  • the permanent magnet 400 embedded in the rotor is provided near the d-axis. In the example shown in FIG. 3, three poles are provided per pole in order to prevent breakage due to centrifugal force.
  • the rotor 3 includes a rotor core 7 made of electromagnetic steel plates stacked in a direction along the rotation axis, and a permanent magnet 400 for forming magnetic poles provided on the rotor core 7.
  • a permanent magnet 400 for forming magnetic poles provided on the rotor core 7.
  • one magnetic pole that is, each magnetic pole is formed by three magnets 400 arranged linearly per one pole.
  • the magnets forming the magnetic poles are magnetized in the d-axis direction, and if one of the magnetic poles is magnetized so that the stator side is the N pole, the magnets constituting the adjacent magnetic poles are conversely the stator side is the S pole. It is magnetized so that
  • each magnetic pole is formed by at least three sets of magnets arranged linearly in the circumferential direction, but the arrangement of the magnets may be other than linear. For example, it may be arranged in a V shape, or may be arranged in a combination of a V shape and a bathtub shape. If the amount of magnets constituting each magnetic pole is increased, the amount of magnetic flux of each magnetic pole increases, and the generated rotational torque tends to increase or the induced voltage induced tends to increase.
  • FIG. 1 to FIG. 3 it is complicated to attach reference symbols to all the relevant parts or parts.
  • the reference numerals of the parts are omitted.
  • the structure shown in the embodiment of the present application is a rotating electrical machine (referred to as an embedded magnet type rotating electrical machine) having a structure in which magnets are arranged inside a rotor core.
  • the permanent magnet that forms the magnetic pole has a remarkable effect of suppressing fluctuations in the rotational torque generated by a rotating electric machine having a structure in which the stator side of the rotor core is disposed on the outer peripheral surface (hereinafter referred to as a surface magnet type rotating electric machine)
  • a surface magnet type rotating electric machine There is a drawback that the efficiency is lowered, and it is suitable for a motor for assisting a steering force for which it is essential to suppress fluctuations in rotational torque.
  • the embedded magnet type rotary electric machine is suitable for a high-efficiency or small-sized and high-output rotary electric machine because the gap between the rotor and the stator can be reduced, and is suitable for a rotary electric machine for driving an automobile. Any of the embodiments described in the present application is suitable for a rotating electric machine for running an automobile.
  • magnet insertion holes 6 for inserting and fixing permanent magnets in the rotor core 7 are provided corresponding to the respective magnets, and provided corresponding to the respective magnetic poles.
  • the magnet insertion holes 6 are arranged so as to open to the stator side, and are arranged over the entire circumference corresponding to each magnetic pole. Since the magnet insertion hole 6 also plays a role of preventing an increase in the d-axis inductance Ld, it also has a role of improving the reluctance torque generated by the difference between Ld and Lq. Therefore, the magnet insertion hole 6 does not necessarily need to be filled with a magnet, and any material may be used as long as the relative permeability is lower than that of the rotor core. Further, when nothing is charged, it operates with only the reluctance torque, so it is called a synchronous reluctance motor.
  • Each magnet insertion hole 6 of the rotor core 7 is formed by punching, for example.
  • the rotor core 7 formed of electromagnetic steel plates stacked in the direction of the rotation axis is fixed to a shaft 8 (not shown) and rotates together with the shaft 8.
  • the rotor core 7 of the rotor 3 forms an auxiliary magnetic pole portion 33 for passing the q-axis magnetic flux ⁇ q generated by the stator over the entire circumference between adjacent magnetic poles in the circumferential direction. A part of it is shown in FIG. In a reverse view, in FIG. 3, a magnetic pole formed by a permanent magnet is provided between each adjacent auxiliary magnetic pole portion 33.
  • each magnetic pole has a plurality of permanent magnets attached to the stator side. It is arranged in the open state. Since the permanent magnet housed and held in each magnet insertion hole also has a role of a flux barrier, a material having a low recoil permeability is desirable.
  • the rotor core 7 of the rotor 3 is further provided with a hole 37 on the inner diameter side of the magnet insertion hole 6.
  • the hole 37 is formed to have a shape along the magnetic flux during powering.
  • the hole 37 has an asymmetric shape in the circumferential direction when viewed from the d-axis as the center line so that the area on the rotation direction side of the rotor (counterclockwise in the example of FIG. 2) is increased. Is formed.
  • the hole 37 in the present embodiment has a shape symmetrical in the circumferential direction on the inner diameter side, but is configured to expand toward the magnet insertion hole 6 on the rotation direction side on the outer diameter side.
  • the hole 37 of the present embodiment includes a first boundary line 38 extending from the counter-rotation direction to the outermost diameter portion as a boundary line constituting the outer diameter portion of the hole 37, and a rotation direction. And a second boundary line 39 extending to the outermost diameter portion.
  • the first boundary line 38 is formed in an arc shape that is convex toward the inner diameter side. This arc may be a circular arc or an elliptical arc.
  • the first boundary line 38 has a shape in which the center point of the circular arc or the focal point of the elliptical arc is located on the outer diameter side from the first boundary line 38.
  • the outermost diameter portion of the hole 37 of this embodiment is located on the rotational direction side when viewed from the d-axis.
  • the 1st boundary line 38 and the 2nd boundary line 39 were illustrated here for description, if the shape of the hole 37 is formed so that it may become a shape along the magnetic flux at the time of power running, There may be other boundary lines constituting the outer diameter side.
  • the portion connecting the first boundary line 38 and the second boundary line 38 does not need to be configured at an acute angle, and may be configured to be connected via a curve as shown in FIGS. good.
  • FIG. 3 shows an example in which the rotor 3 rotates counterclockwise.
  • a magnetic circuit 601 indicated by a broken line is created at the time of maximum torque in power running.
  • the d-axis magnetic flux ⁇ d generated by the permanent magnet 400 is passed through the magnetic pole piece 34 formed by the rotor core 7 between the rotor outer periphery and the gap 36 between the rotor 3 and the stator 4. It passes through the stator 2, passes through the permanent magnet 400 of another adjacent magnetic pole, and returns to the original permanent magnet 400.
  • the magnetic flux ⁇ d passing through the magnetic circuit acts on the current flowing through the stator winding 5 when passing through the stator 2 to generate a rotational torque.
  • the magnetic flux ⁇ d passing through the magnetic circuit is linked to the stator winding 5, and an induced voltage is generated in the stator winding 5 based on the amount of change per unit time in the amount of flux linkage.
  • FIG. 3 is a conceptual diagram and does not accurately represent the magnetic flux
  • the magnetic flux ⁇ d is along the magnetization direction inside the permanent magnet 400 and vertically enters and exits on the surface thereof. 4 and enters and exits perpendicularly to the surface of the rotor core 7.
  • a magnetic circuit 602 indicated by a solid line is created.
  • the hole 37 works in a direction to block the magnetic flux. Therefore, the maximum torque is reduced, but the inductance is reduced, so that the voltage between the terminals is reduced. Therefore, the structure is suitable for high-speed rotation.
  • Fig. 4 shows the torque-rotational speed characteristics of this example.
  • the case where the holes were symmetric with respect to the d axis was taken as a comparative example.
  • the torque is positive, it indicates the maximum torque in the power running mode, and when it is negative, it indicates the maximum torque in the regenerative mode.
  • the power running mode agrees with the regenerative mode, but the maximum torque is small, but when it exceeds 7000 r / min, the present invention exhibits higher characteristics than the comparative example. This is an advantage due to the low voltage between terminals.
  • Fig. 5 shows a graph plotting the maximum torque performance when the hole arrangement angle is changed.
  • the hole arrangement angle indicates the mechanical angle [deg] of the q axis and the second boundary line 39 of the hole 37. 2 and 3, the peak of the maximum power running torque is shown when the hole arrangement angle is 35 deg.
  • the maximum regenerative torque is maximum in the vicinity of 5 deg, and this form may be used as long as it is used only for power generation.
  • FIG. 6 shows a magnetic flux diagram at the maximum torque in the power running mode when the hole arrangement angle is 35 deg. From this, it can be seen that holes are provided along the magnetic flux lines.
  • FIG. 7 shows analysis of inertia, torque, and loss when the hole arrangement angle of the conventional example and the present invention is 35 deg.
  • Torque and loss were set to 3 cases at rated operation in power running mode, maximum torque at low speed, and maximum torque at high speed. As a result, it can be seen that the torque and loss hardly changed and the inertia was successfully reduced by 5%.
  • the rotating electrical machine 1 includes the rotating electrical machine 1, a DC power source 51 that constitutes a driving power source of the rotating electrical machine 1, and a control device that controls driving by controlling electric power supplied to the rotating electrical machine 1. ing.
  • the DC power source 51 may be configured by, for example, an AC power source and a converter unit that converts AC power from the AC power source into DC power, or may be a lithium ion secondary battery or a nickel hydride secondary battery mounted on a vehicle. May be.
  • the control device is an inverter device that receives DC power from the DC power source 51 and converts it into AC power, and supplies the AC power to the stator winding 5 of the rotating electrical machine 1.
  • the inverter device includes a power system inverter circuit 53 (power conversion circuit) electrically connected between the DC power supply 51 and the stator winding 5, and a control circuit 130 that controls the operation of the inverter circuit 53. ing.
  • the inverter circuit 53 has a bridge circuit composed of a switching semiconductor element, for example, a MOS-FET (metal oxide semiconductor field effect transistor) or an IGBT (insulated gate bipolar transistor), and a direct current from a smoothing capacitor module.
  • the power is converted into AC power, or the AC power generated by the rotating electrical machine is converted into DC power.
  • the bridge circuit includes a high-potential-side switch called an arm, a low-potential-side switch, and a series circuit that are electrically connected in parallel by the number of phases of the rotating electrical machine 1 to generate three-phase AC power. In the example, three sets are provided.
  • the terminal of the high potential side switch of each arm is electrically connected to the positive electrode side of the DC power supply 51, and the terminal of the low potential side switch is electrically connected to the negative electrode side of the DC power supply 51.
  • Electrically connected to the stator winding 5 so as to supply a phase voltage to the stator winding 5 of the rotating electrical machine 1 from a connection point between the upper switching semiconductor element and the lower switching semiconductor element of each arm.
  • the phase current supplied from the inverter circuit 53 to the stator winding 5 is measured by current detectors 52 provided on the bus bars of the respective phases for supplying AC power to the rotating electrical machine.
  • the current detector 52 is, for example, a current transformer.
  • the control circuit 130 operates to control the switching operation of the switching semiconductor element of the inverter circuit 53 for obtaining the target torque based on input information including a torque command and a braking command. As input information, for example, a current command signal Is that is a required torque for the rotating electrical machine 1 and a magnetic pole position ⁇ of the rotor 3 of the rotating electrical machine 1 are input.
  • the current command signal Is which is a required torque, is calculated by the control circuit 130 by a command sent from the host controller in accordance with a required amount such as an accelerator operation amount required by the driver in the case of a vehicle.
  • the magnetic pole position ⁇ is detection information obtained from the output of the magnetic pole position detector PS.
  • the speed control circuit 58 is an actual speed obtained through the F / V converter 61 that converts the frequency into voltage from the speed command ⁇ s generated by the request command of the host controller and the position information ⁇ 1 from the encoder.
  • a speed difference ⁇ e is calculated from the speed ⁇ f, and a current command Is that is a torque command and a rotation angle ⁇ 1 of the rotor 3 are output to the difference by PI control.
  • the PI control is a commonly used control method that uses a proportional term P and an integral term I that multiply a deviation value by a proportional multiplier.
  • the phase shift circuit 54 shifts the phase of the rotation-synchronized pulse generated by the rotation speed detector E, that is, the position information ⁇ of the rotor 3 in accordance with the rotation angle ⁇ 1 command from the speed control circuit 58, and outputs it. .
  • a combined vector of armature magnetomotive force generated by current flowing in the stator winding 5 is advanced by 90 degrees or more in electrical angle with respect to the direction of magnetic flux or magnetic field generated by the permanent magnet 400.
  • the sine wave / cosine wave generation circuit 59 is based on the position detection PS for detecting the magnetic pole position of the permanent magnet 400 of the rotor 3 and the position information ⁇ of the phase shifted rotor from the phase shift circuit 54.
  • a sine wave output is generated by shifting the induced voltage of each winding of the winding 5 in phase.
  • the phase shift amount includes a case where the value is zero.
  • the two-phase to three-phase conversion circuit 56 outputs current commands Isu, Isv, and Isw for each phase according to the current command IS from the speed control circuit 58 and the output of the sine wave / cosine wave generation circuit 59.
  • Each phase has a current control system 55a, 55b, 55c, respectively, and sends current commands Isu, Isv, Isw and current detection signals Ifu, Ifv, Ifw from the current detector 52 to the inverter circuit 53.
  • the switching operation of the switching semiconductor element is controlled, and each phase current of the three-phase alternating current is controlled.
  • the current of each phase combination is controlled at a position perpendicular to the field magnetic flux or at a phase shifted position, so that a characteristic equivalent to that of a DC machine can be obtained without a commutator.
  • the signals output from the current control systems 55a, 55b, and 55c for each phase of the alternating current described above are input to the control terminals of the switching semiconductors that constitute the corresponding phase arm.
  • each switching semiconductor performs a switching operation that is an on / off operation, and the DC power supplied from the DC power source 51 via the smoothing capacitor module is converted into AC power, and the stator winding 5 corresponds to the switching power. Supplied to the phase winding.
  • the resultant vector of the armature magnetomotive force flowing in the stator winding 5 is orthogonal to the direction of the magnetic flux or magnetic field generated by the permanent magnet 400, or is phase-shifted.
  • a current flowing through the stator winding 5 (phase current flowing through each phase winding) is always formed.
  • the field weakening current is such that the resultant vector of the armature magnetomotive force generated by the current flowing through the stator winding 5 advances 90 degrees (electrical angle) or more with respect to the direction of the magnetic flux or magnetic field generated by the permanent magnet 400.
  • the current flowing through the stator winding 5 (phase current flowing through each phase winding) is always formed.
  • the armature magnetomotive force generated by the current flowing through the stator winding 5 is fixed so that the resultant vector is orthogonal to the direction of the magnetic flux or magnetic field generated by the permanent magnet 400. If the current flowing through the child winding 5 (phase current flowing through each phase winding) is controlled based on the magnetic pole position of the rotor 3, the maximum torque can be continuously output from the rotating electrical machine 1.
  • the resultant vector of the armature magnetomotive force generated by the current flowing through the stator winding 5 is advanced by 90 degrees (electrical angle) or more with respect to the direction of the magnetic flux or magnetic field generated by the permanent magnet 400.
  • the current flowing through the stator winding 5 (phase current flowing through each phase winding) may be controlled based on the magnetic pole position of the rotor 3.
  • the rotating electrical machine 1 further includes a magnetic flux detector 60, and a value representing the amount of magnetic flux output from the magnetic flux detector 60 and the actual speed ⁇ f output from the F / V converter 62 are input to the magnetization determination circuit 61. Then, the necessity of re-magnetization is determined. If a strong magnetic flux exceeding the range of reversible demagnetization is applied to the permanent magnet by applying the magnetic flux based on the field weakening current to the permanent magnet 400, the permanent magnet, particularly the second permanent magnet 402, is demagnetized. There is a risk that.
  • the magnetization determination circuit 61 outputs a magnetization command to the phase shift circuit 54.
  • FIG. 8 shows the relationship between the current phase and torque in the above-described rotating electrical machine having a built-in permanent magnet.
  • the current phase 0 degree is the q axis.
  • the resultant vector of the armature magnetomotive force generated by the current flowing through the stator winding 5 is set in the direction of the magnetic flux or magnetic field generated by the permanent magnet 400.
  • the current flowing through the stator winding 5, that is, the phase current flowing through each phase winding is controlled so as to be delayed by about 90 degrees in electrical angle.
  • the explanation is made on the inner rotating type rotating electric machine, but the present invention can also be applied to the outer rotating type rotating electric machine. Further, the present invention can be applied to both a distributed winding type rotating electrical machine and a concentrated winding type rotating electrical machine.
  • FIG. 13 is a block diagram of an electric vehicle to which the present invention is applied.
  • the body 100 of the electric vehicle is supported by four wheels 110, 112, 114, and 116. Since this electric vehicle is front-wheel drive, a rotating electrical machine 1 that generates traveling torque or braking torque is mechanically connected to the front axle 154, and the rotational torque generated by the rotating electrical machine 1 is generated. It is transmitted by a mechanical transmission mechanism. The rotating electrical machine 1 is driven by the three-phase AC power generated by the control device 130 and the inverter circuit 53 described with reference to FIG. 7, and the driving torque is controlled.
  • a DC power source 51 composed of a high-voltage battery such as a lithium secondary battery is provided, and the inverter circuit 53 generates DC power from the DC power source 51 based on the control of the control device 130.
  • a switching operation is performed, converted into AC power, and supplied to the rotating electrical machine 1.
  • the wheels 110 and 114 are driven by the rotational torque of the rotating electrical machine 1, and the vehicle travels.
  • the control device 130 reverses the phase of the AC power generated by the inverter circuit with respect to the magnetic pole of the rotor, so that the rotating electrical machine 1 acts as a generator and the regenerative braking operation is performed.
  • the rotating electrical machine 1 generates rotational torque in a direction that suppresses traveling, and generates braking force for traveling of the vehicle 100.
  • the kinetic energy of the vehicle is converted into electric energy, and the DC power supply 51 is charged with the electric energy.
  • the rotating electric machine is described as being used for driving the wheels of an electric vehicle.
  • the rotating electric machine can be used in a driving device for an electric vehicle, a driving device for an electric construction machine, and any other driving device. is there.
  • the rotating electrical machine according to the present embodiment is applied to an electric vehicle, particularly an electric vehicle, an electric vehicle having low inertia, a maximum rotation speed during regeneration, and a large regenerative output can be provided.
  • this invention is not limited to the above-mentioned Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
  • Rotating electric machine 2 Stator 3 Rotor 4 Stator core 5 Stator winding 6 Magnet insertion hole 7 Rotor core 8 Shaft 9 End bracket 10 Bearing 11 Housing 21 Stator yoke 22 Teeth Club 23 slots 33 Auxiliary magnetic pole 34 Magnetic pole piece 35 Magnetic gap 36 gap 37 holes 38 First border 39 Second boundary 51 DC power supply 52 Current detector 53 Inverter circuit 54 Phase shift circuit 55a, 55b, 55c Current control system for each phase 100 Electric vehicle 110, 112, 114, 116 wheels 130 Electric Vehicle Control Device 154 axle 400 Permanent magnet 501 bridge 601 Magnetic circuit (powering) 602 Magnetic circuit (in regeneration) PS rotation speed detector E Rotational position detector

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention porte sur un rotor pour une machine électrique tournante qui peut améliorer des caractéristiques de couple tout en supprimant une augmentation d'inertie dans la machine électrique tournante, sur une machine électrique tournante comportant un tel rotor, sur un système de pilotage électrique, et sur un véhicule électrique. Cette invention est un rotor (3) d'une machine électrique tournante (1), dans lequel un aimant permanent (400) ou une barrière de flux sont disposés sur un noyau de rotor (7), dans lequel, si l'axe d est réalisé par l'axe de pôle magnétique de l'aimant permanent ou est réalisé par une ligne joignant un axe de rotation et un emplacement de pôle magnétique où la résistance magnétique d'un circuit magnétique par lequel un flux magnétique généré par un stator (2) retourne vers le stator par l'intermédiaire du rotor est la plus élevée, le noyau de rotor possède un trou sur l'axe d et au moins une partie de la ligne de limite qui forme le côté de diamètre externe du trou est formée afin de suivre le flux magnétique traversant le noyau de rotor lorsqu'un couple maximal est généré ou qu'un couple minimal est généré.
PCT/JP2014/056097 2013-05-20 2014-03-10 Rotor pour machine électrique tournante, machine électrique tournante, système de pilotage électrique et véhicule électrique WO2014188757A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015518124A JPWO2014188757A1 (ja) 2013-05-20 2014-03-10 回転電機の回転子、回転電機、電動駆動システム、及び電動車両

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-105726 2013-05-20
JP2013105726 2013-05-20

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WO2014188757A1 true WO2014188757A1 (fr) 2014-11-27

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PCT/JP2014/056097 WO2014188757A1 (fr) 2013-05-20 2014-03-10 Rotor pour machine électrique tournante, machine électrique tournante, système de pilotage électrique et véhicule électrique

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Cited By (5)

* Cited by examiner, † Cited by third party
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