WO2023079686A1 - ストラドルドビークル - Google Patents

ストラドルドビークル Download PDF

Info

Publication number
WO2023079686A1
WO2023079686A1 PCT/JP2021/040794 JP2021040794W WO2023079686A1 WO 2023079686 A1 WO2023079686 A1 WO 2023079686A1 JP 2021040794 W JP2021040794 W JP 2021040794W WO 2023079686 A1 WO2023079686 A1 WO 2023079686A1
Authority
WO
WIPO (PCT)
Prior art keywords
output state
rotor
state
synchronous motor
permanent magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/040794
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
桂介 井出
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to PCT/JP2021/040794 priority Critical patent/WO2023079686A1/ja
Priority to JP2023557543A priority patent/JP7603839B2/ja
Publication of WO2023079686A1 publication Critical patent/WO2023079686A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M29/00—Ground engaging propulsion devices for cycles, sledges, or rider-propelled wheeled vehicles, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
    • 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
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/08—Arrangements for controlling the speed or torque of a single motor

Definitions

  • the present invention relates to a straddle-type vehicle.
  • a straddle-type vehicle is provided with a load-variable four-stroke engine having a high-load region in which the load for rotating the crankshaft of the engine is large and a low-load region in which the load for rotating the crankshaft is small during four strokes.
  • Such a load-variable four-stroke engine requires a large output torque from the motor for starting in order to rotate the crankshaft beyond the high load region when starting the engine.
  • the size of the motor increases. As a result, the straddle-type vehicle becomes large.
  • Patent Literature 1 discloses a straddle-type vehicle equipped with a variable load four-stroke engine having a high load region and a low load region between four strokes.
  • the control device for a straddle-type vehicle disclosed in Patent Document 1 causes a motor to start rotating a crankshaft in response to an input of a start instruction, and accelerates the rotation of the crankshaft in the run-up section until reaching a high load region.
  • a straddle-type vehicle such as that disclosed in Patent Document 1 attempts to shorten the time required for starting by overcoming a high-load region by utilizing both the large inertial force associated with high rotational speeds and the output torque of the motor. .
  • An object of the present invention is to provide a straddle-type vehicle that can reduce the time required for starting the engine while suppressing an increase in size.
  • the inventor of the present invention focused on the output of the motor at the start of rotation while further studying the time required for starting.
  • the rotor has magnetic pole pairs.
  • a rotor having magnetic pole pairs receives rotational force from a magnetic field formed by currents flowing through windings of each phase of the stator.
  • the output of the motor is generated by rotating the rotor according to the periodic changes in the current flowing through the windings of each phase.
  • the ideal direction for generating rotational force by the magnetic fields formed by the currents flowing in the windings of each phase and the direction of the rotor may differ.
  • the ideal orientation is the orientation in which the rotor obtains the maximum rotational force from the magnetic field.
  • the rotor may have a period of time during which it does not follow the rotation of the magnetic field due to restrictions on the rotational force generated in the rotor at the start of rotation, or the rotational force generated in the rotor in the reverse direction. be. That is, the rotational force applied to the rotor in the stopped state is different from the rotational force applied in the case of the ideal position. In this case, there is a delay in the time it takes for the rotor to start accelerating. As a result, there is a delay in the time it takes for the crankshaft to rotate to the high load region. Since the amount of delay varies depending on the orientation of the stalled rotor, each engine start takes a different amount of time to start. The average engine start-up time is lengthened by the delay.
  • the present inventor has proposed that when a start instruction is input, the current is supplied to the winding so that a relatively small output is output during the period in which the rotor in the stopped state rotates by an angle smaller than the rotation angle corresponding to one of the magnetic pole pairs. It was found that the variation in engine start time can be suppressed by flowing More specifically, when a start instruction is input, first, in the low output state, the rotor in the stopped state is wound so as to output a small output during a period in which it rotates by an angle smaller than the rotation angle corresponding to one of the magnetic pole pairs. A current flows through the line. As a result, even if the direction of the stopped rotor is different from the ideal direction, the rotational fluctuation of the rotor is suppressed.
  • the rotating force is suppressed. Therefore, in a high-output state following a low-output state, the rotor easily follows the magnetic field formed in the high-output state when switching the polarity of the current of each phase while flowing a current that increases the output.
  • the rotor if the rotor is oriented in an ideal orientation, the rotor can immediately follow the orientation of the magnetic field created by the current in the low power state and receive rotational forces. Therefore, it is possible to suppress variations in the time taken to start the engine. Therefore, it is possible to shorten the time required to start the engine without increasing the size of the motor, as compared with the case where there is no configuration for flowing current to the windings so as to output a relatively small output.
  • the present invention adopts the following configuration in order to solve the above-mentioned problems.
  • a straddle-type vehicle The straddle-type vehicle It has a crankshaft that outputs power, and during four strokes, there are a high load region in which the load for rotating the crankshaft is large and a low load region in which the load for rotating the crankshaft is smaller than the load in the high load region.
  • a variable load four-stroke engine having A permanent magnet synchronous motor having a rotor directly connected to the crankshaft and having permanent magnets arranged to form a plurality of magnetic pole pairs aligned in the direction of rotation, and a stator having multi-phase windings.
  • an inverter having a plurality of switching units for controlling currents flowing through the windings of the plurality of phases;
  • the zero output state is a state in which the plurality of switching units are set to zero or substantially zero the output of the permanent magnet synchronous motor so that the rotor does not rotate
  • the high output state is a state in which the plurality of switching units are controlled so that the rotation of the rotor is accelerated
  • the low power state is such that the plurality of switching units rotates the permanent magnet for a period of time during which the rotor rotates through an angle less than a rotation angle corresponding to one of the plurality of magnetic pole pairs, such that rotation of the rotor begins.
  • the output of the synchronous motor is controlled to be greater than the zero output state and less than the high output state, and the plurality of switching units are configured to control the output of the rotor before and after the transition to the high output state. It is a state in which the rotation and the positive/negative patterns of the currents flowing through the windings of the plurality of phases are each controlled to continue.
  • the straddle-type vehicle (1) includes a load-variable four-stroke engine, a permanent-magnet synchronous motor, an inverter, and a control device.
  • a variable load four-stroke engine has a crankshaft that outputs power.
  • a variable load four-stroke engine has a high load region and a low load region during four strokes.
  • the high load region is a region where the load that rotates the crankshaft is large.
  • the low load range is a range in which the load that rotates the crankshaft is smaller than the load in the high load range.
  • a permanent magnet synchronous motor has a rotor and a stator. The rotor is directly connected to the crankshaft. The rotor has permanent magnets.
  • the permanent magnets are arranged to form a plurality of magnetic pole pairs aligned in the direction of rotation.
  • the stator has multiple phase windings.
  • the inverter has a plurality of switching units. The plurality of switching units control the currents flowing through each of the windings of the plurality of phases.
  • the control device controls the plurality of switching units to change in order from a zero output state to a low output state and then to a high output state.
  • the start instruction is an instruction for starting the load varying four-stroke engine.
  • a zero output state is a state in which the plurality of switching units are set to zero or substantially zero output of the permanent magnet synchronous motor so that the rotor does not rotate.
  • the high power state is a state in which multiple switching units are controlled such that the rotation of the rotor is accelerated.
  • a low power state is a state in which the switching elements are controlled such that the rotor begins to rotate.
  • the plurality of switching units are controlled in a low power state during periods in which the rotor rotates through an angle smaller than the rotation angle corresponding to one of the plurality of pole pairs. In the low power state, the plurality of switching units are controlled to make the permanent magnet synchronous motor output greater than the zero power state and less than the high power state. Further, the plurality of switching units are controlled so that the rotation of the rotor and the positive/negative patterns of the currents flowing through the windings of the plurality of phases continue before and after the transition from the low output state to the high output state. be done.
  • the control device controls the plurality of switching units to change from the zero output state to the low output state.
  • current is passed through the windings to provide a low power output during periods when the stationary rotor rotates through an angle less than the angle of rotation corresponding to one of the pole pairs. This initiates rotation of the rotor.
  • a plurality of switching units are controlled to make the output of the permanent magnet synchronous motor greater than the zero output state and less than the high output state. Therefore, even if the orientation of the rotor before starting rotation differs from the ideal orientation, the difference in behavior of the rotor compared to the ideal orientation is suppressed.
  • the rotating force is suppressed. Therefore, in a high-output state following a low-output state, when the positive and negative patterns of the current of each phase are sequentially switched while the current that increases the output is flowing, the rotor can follow the changing magnetic field in a short time. Cheap.
  • the rotor if the rotor is oriented in an ideal orientation before it starts rotating, the rotor will immediately follow the orientation of the magnetic field created by the current in the windings in the low power state, resulting in a rotational force. can receive That is, the rotor follows the changing magnetic field from the start of rotation. Therefore, the rotor accelerates in a short time. Therefore, it is possible to suppress the delay in the time taken to start the engine. Therefore, the time required to start the engine can be shortened without increasing the size of the motor.
  • the output of the permanent magnet synchronous motor is suppressed to a degree smaller than the force with which the crankshaft overcomes the high load region. Therefore, even if the orientation of the rotor before starting rotation is different from the ideal orientation, the difference in behavior of the rotor compared to the behavior in the ideal orientation is suppressed. Therefore, the rotation of the rotor smoothly accelerates in a high power state following a low power state. Therefore, the time required for starting the engine can be shortened.
  • the control device PWM-controls the switching unit, and makes the duty ratio of the PWM control in the low output state smaller than the duty ratio in the high output state, so that the permanent magnet synchronous motor is driven from the high output state. output a smaller output in the low output state.
  • the permanent magnet synchronous motor is a motor generator that also serves as a generator that is driven by an engine to generate electricity.
  • the permanent magnet type synchronous motor also serves as a generator, so that the straddle-type vehicle can be made more compact and the time required for starting the engine can be shortened.
  • a straddle-type vehicle causes the switching unit to start supplying current to the windings of the plurality of phases so that the rotor rotates when the starting instruction is input.
  • the time from the input of the start instruction to the start of rotation of the rotor is shortened. Therefore, the time required for starting the engine can be shortened.
  • variable load four-stroke engine is a single cylinder engine.
  • the rotation of the crankshaft can be accelerated in a longer run-up section until reaching the high load region, compared to, for example, the case of having multiple cylinders. Therefore, the crankshaft can take advantage of the large inertia force associated with the higher rotational speed to overcome the high load region, thereby shortening the start-up time.
  • connection and “coupled” are not limited to physical or mechanical connections or couplings, but can include direct or indirect electrical connections or couplings.
  • all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be construed to have a meaning consistent with their meaning in the context of the relevant art and this disclosure, and are not expressly defined herein. not be construed in an ideal or overly formal sense unless explicitly stated. In describing the present invention, it is understood that numerous techniques and processes are disclosed. Each of these has individual benefits, and each can also be used with one or more, or possibly all, of the other disclosed techniques.
  • a straddle-type vehicle is a vehicle in which the driver sits astride the saddle.
  • a straddle-type vehicle of the present invention is, for example, a motorcycle.
  • the straddle-type vehicle is not limited to a motorcycle, and may be, for example, a three-wheeled motor vehicle, an ATV (All-Terrain Vehicle), or the like.
  • the straddle-type vehicle is configured to be able to turn in a lean posture.
  • a straddle-type vehicle that is configured to turn in a lean posture is configured to turn in a posture that is inclined toward the center of a curve.
  • the straddle-type vehicle configured to be able to turn in a lean posture resists the centrifugal force applied to the vehicle during turning.
  • Straddle-type vehicles configured to be able to turn in a lean posture are required to have responsiveness to operations, so miniaturization is important.
  • the straddle-type vehicle is not particularly limited, and may be, for example, a vehicle that does not turn in a lean posture.
  • a variable load four-stroke engine has a high load region and a low load region during four strokes.
  • a variable load four-stroke engine is, for example, a single-cylinder engine.
  • a variable load four-stroke engine may, for example, be a two cylinder staggered combustion engine.
  • An example of an unequal interval combustion engine having two cylinders is a V-type engine.
  • the high load region refers to a region in one combustion cycle of the engine in which the load torque is higher than the average value of the load torque in one combustion cycle.
  • the low load range refers to a range other than the high load range in one combustion cycle. Considering the rotation angle of the crankshaft as a reference, the low load range of the engine is wider than, for example, the high load range.
  • the compression stroke has a high load region and an overlap.
  • a permanent magnet synchronous motor is a motor with permanent magnets.
  • a permanent magnet synchronous motor has a stator and a rotor.
  • the rotor of a permanent magnet synchronous motor has permanent magnets.
  • a stator of a permanent magnet synchronous motor includes a stator core and windings.
  • a permanent magnet synchronous motor of the present invention includes windings corresponding to a plurality of phases.
  • the permanent magnet synchronous motor of the present invention may have windings corresponding to, for example, two phases or four or more phases.
  • the permanent magnet type synchronous motor of the present invention can easily be driven by sine waves or square waves by providing windings corresponding to three phases, for example.
  • the stator windings surround the stator core.
  • a permanent magnet synchronous motor is, for example, a radial gap type motor, which is an outer rotor type motor having a rotor that rotates outward from a stator.
  • the permanent magnet type synchronous motor is not particularly limited, and may be an inner rotor type motor having a rotor that rotates inside the stator.
  • a permanent magnet synchronous motor for example, also functions as a generator.
  • the permanent magnet synchronous motor is not particularly limited, and may be, for example, a permanent magnet synchronous motor that does not function as a generator.
  • the direct connection between the rotor and the crankshaft may be, for example, a mode in which the rotor and the crankshaft are connected so as to have a common rotational axis.
  • connection modes for example, known joining modes such as taper fitting, flange joining, and spline joining can be adopted.
  • Permanent magnet synchronous motors for example, have more poles than 2/3 of the number of teeth.
  • the permanent magnet type synchronous motor is not particularly limited, and may have, for example, two-thirds or less of magnetic poles than the number of teeth.
  • Permanent magnet synchronous motors are provided, for example, in contact with oil common to the crankshaft.
  • the permanent magnet type synchronous motor is not particularly limited, and may be provided so as not to come into contact with oil, for example.
  • the inverter has multiple switching units that control the current output from the battery to the permanent magnet synchronous motor.
  • a switching part has a semiconductor element, for example.
  • the switching unit includes, for example, FETs (Field Effect Transistors), thyristors, and IGBTs (Insulated Gate Bipolar Transistors).
  • the inverter has, for example, a bridge inverter composed of a plurality of switching units.
  • the control device includes, for example, a control device that controls the operation of the engine.
  • the control device of the present invention is not particularly limited, and may be, for example, a control device separate from a device that controls the operation of the engine.
  • a start instruction is an instruction to start the engine.
  • the start instruction is output from, for example, a start instruction unit provided in the straddle-type vehicle.
  • the starting instruction unit is, for example, a starter switch operated by the driver.
  • the start instruction is output from the start instruction unit based on the driver's operation.
  • the control device itself executes a restart instruction by determining a predetermined engine start condition.
  • the engine start condition includes, for example, accelerator operation or clutch operation. Achieving a predetermined engine start condition is included in inputting the start instruction.
  • a zero output state in the controller is a state in which the plurality of switching units are set such that the rotor does not rotate.
  • a zero output state is, for example, that no current is supplied to the windings from the switching section.
  • the switching unit is controlled, for example, so that the terminals of the winding are in an open state.
  • the switching section is not particularly limited, and the switching section may be controlled so that the terminals of the winding are short-circuited.
  • the control device may control the switching unit such that the windings are energized to such an extent that the rotor does not rotate, for example for the purpose of detecting the position of the rotor.
  • the high power state is a state in which multiple switching units are controlled such that the rotation of the rotor is accelerated.
  • the control device sequentially switches the positive and negative patterns of the currents flowing through the windings of the multiple phases in the switching unit so that the rotation of the rotor is accelerated.
  • the controller for example, provides sinusoidal drive. In this case, the current flowing through each of the windings changes sinusoidally.
  • a distinction is made between positive and negative currents on the basis of the sinusoidally varying current average.
  • the driving method of the control device is not particularly limited, and may be square wave driving, for example.
  • a pattern is the type of assignment of positive and negative currents to the windings of multiple phases.
  • a low power state is a state in which the switching elements are controlled such that the rotor begins to rotate.
  • the plurality of switching units are controlled in a low power state during periods in which the rotor rotates through an angle smaller than the rotation angle corresponding to one of the plurality of pole pairs.
  • the plurality of switching units are controlled to make the permanent magnet synchronous motor output greater than the zero power state and less than the high power state.
  • the switching units are controlled such that the permanent magnet synchronous motor outputs less force than the crankshaft will drive over the high load region of a variable load four-stroke engine. Rotation of the rotor continues around the transition from the low power state to the high power state.
  • Rotation of the rotor does not stop before and after the transition from the low power state to the high power state. Stopping the rotation of the rotor means that the stopped state continues. For example, continuation of rotation includes a case where the rotation speed of the rotor changes and a case where the direction of rotation of the rotor changes instantaneously.
  • the initial pattern continues around the transition from the low power state to the high power state. Before and after the transition, the sign of the current does not change, but the magnitude of the current changes.
  • the duty ratio in the PWM control in the low output state and the duty ratio in the PWM control in the high output state are compared with the duty in the same phase in the cycle of the fluctuation when the control device periodically fluctuates the duty such as sinusoidal drive. can do.
  • duty ratios at local maximum values can be compared as a representative.
  • FIG. 1 is a diagram illustrating a straddle-type vehicle according to an embodiment of the present invention
  • FIG. FIG. 2 is a sectional view showing an engine unit in an application example of the straddle-type vehicle 1 shown in FIG. 1
  • FIG. 4 is an explanatory diagram schematically showing the relationship between the crank angle position and the load torque of a load-variable four-stroke engine
  • FIG. 3 is a sectional view showing a section perpendicular to the rotation axis of the permanent magnet synchronous motor 20 shown in FIG. 2
  • 3 is a block diagram showing a schematic electrical configuration of the engine unit shown in FIG. 2 and its surroundings
  • FIG. FIG. 3 is a flowchart for explaining an operation related to starting the load-variable four-stroke engine shown in FIG. 2;
  • FIG. 7 is a time chart showing changes in currents supplied to windings of multiple phases under the control of the control device shown in FIGS. 5 and 6;
  • FIG. It is a time chart which shows the output of the permanent magnet type synchronous motor at the time of start-up of the engine which concerns on 2nd embodiment.
  • FIG. 1 is a diagram illustrating a straddle-type vehicle according to one embodiment of the present invention.
  • Part (a) of FIG. 1 is a graph showing the load torque of the engine of the straddle-type vehicle.
  • Part (b) of FIG. 1 is a block diagram showing a schematic configuration of a straddle-type vehicle.
  • Part (c) of FIG. 1 is a cross-sectional view showing the external force configuration of the permanent magnet synchronous motor.
  • Part (d) of FIG. 1 is a time chart showing the output of the permanent magnet synchronous motor when the engine is started.
  • a straddle-type vehicle 1 shown in part (b) of FIG. 1 is a vehicle in which a driver sits astride a saddle 2a.
  • a straddle-type vehicle 1 includes a vehicle body 2 and wheels 3a and 3b. The rear wheels 3b function as drive wheels.
  • a straddle-type vehicle 1 includes a load-variable four-stroke engine 10 , a permanent-magnet synchronous motor 20 , an inverter 50 , and a control device 60 .
  • a variable load four-stroke engine 10 has a crankshaft 15 that outputs power.
  • the load-variable four-stroke engine 10 outputs power through a crankshaft 15 to drive wheels 3b.
  • the wheels 3b receive the power output from the load-variable four-stroke engine 10 to drive the straddle-type vehicle 1.
  • the variable load four-stroke engine 10 has a high load region TH and a low load region TL during four strokes.
  • the high load region TH is a region where the load on the rotation of the crankshaft 15 is large.
  • the low load range TL is a range in which the load that rotates the crankshaft 15 is smaller than the load in the high load range TH.
  • the permanent magnet synchronous motor 20 rotates the crankshaft 15 to start the variable load four-stroke engine 10 .
  • the permanent magnet synchronous motor 20 has a rotor 30 and a stator 40 .
  • Rotor 30 is directly connected to crankshaft 15 .
  • the rotor 30 has permanent magnets 37 .
  • the permanent magnets 37 are arranged to form a plurality of magnetic poles 37a aligned in the direction of rotation.
  • Two magnetic poles 37a adjacent to each other in the direction of rotation form a magnetic pole pair 38.
  • the permanent magnets 37 are arranged to form a plurality of magnetic pole pairs 38 aligned in the direction of rotation.
  • the stator 40 has multi-phase windings 41 .
  • the plurality of permanent magnets 37 and some of the magnetic poles 37a are denoted by reference numerals. Also, only some of the plurality of windings 41 are shown.
  • inverter 50 has a plurality of switching units 51 .
  • the multiple switching units 51 control the currents flowing through the windings 41 of multiple phases.
  • the control device 60 controls the current flowing through each of the multiple-phase windings 41 by controlling the ON/OFF states of the plurality of switching units 51 .
  • the control device 60 controls the rotation of the permanent magnet synchronous motor 20 , more specifically the rotation of the rotor 30 .
  • the controller 60 switches the state of the permanent magnet synchronous motor 20 between a zero output state C0, a low output state C1, and a high output state C2, for example, as shown in part (d) of FIG. .
  • the control device 60 When a start instruction is input while the rotor 30 is not rotating, the control device 60 changes the plurality of switching units 51 from the zero output state C0 to the low output state C1 and then to the high output state C2 in this order. It controls a plurality of switching units 51 .
  • the zero output state C0 is a state in which the multiple switching units 51 are set to zero or substantially zero the output of the permanent magnet synchronous motor 20 so that the rotor 30 does not rotate. More specifically, the zero output state C0 is a state in which the controller 60 controls the switching section 51 so that the rotor 30 does not rotate. For example, in the zero output state C0, all of the plurality of switching units 51 are in the OFF state, and current does not flow through any of the windings 41 of the plurality of phases. Therefore, the rotor 30 is stopped and does not rotate.
  • the high output state C2 is a state in which the plurality of switching units 51 are controlled so that the rotation of the rotor 30 is accelerated.
  • the high-output state C2 is a state in which the control device 60 causes the switching unit 51 to sequentially switch the positive/negative pattern of the current flowing through each of the windings 41 of the plurality of phases while supplying current to each of the windings 41 of the plurality of phases. .
  • the control device 60 causes the switching unit 51 to sequentially switch the positive/negative pattern of the current flowing through each of the multiple-phase windings 41 from the initial pattern.
  • the initial pattern is the initial positive/negative pattern of the currents flowing through each of the multiple-phase windings 41 in the high output state C2.
  • the rotor 30 starts to rotate, and the plurality of switching units 51 make the output of the permanent magnet synchronous motor 20 greater than the zero output state C0 and less than the high output state C2. It is a controlled state.
  • the multiple switching units 51 are controlled in the low output state C ⁇ b>1 while the rotor 30 rotates through an angle smaller than the rotation angle corresponding to one of the multiple magnetic pole pairs 38 .
  • the low-output state C1 has a plurality of states so that the rotation of the rotor 30 and the positive/negative patterns of the currents flowing through the windings 41 of the plurality of phases are respectively continued. In this state, the switching unit 51 is controlled.
  • the straddle-type vehicle 1 is provided with a start instructing section 4 .
  • the starting instruction unit 4 outputs a starting instruction for starting the load-variable four-stroke engine 10, for example, according to the operation of the driver.
  • the controller 60 causes the switching unit 51 to rotate the permanent magnet synchronous motor 20 through the low output state C1 and the high output state C2. current to the winding 41 of .
  • the control device 60 controls the switching section 51 to the zero output state C0.
  • the control device 60 does not always have to be in the zero output state C0 before the start instruction is input.
  • the control device 60 may control the switching section 51 in the zero output state C0 at the time when the start instruction is input.
  • the control device 60 causes the switching unit 51 to apply current to the multi-phase windings 41 so that the permanent magnet synchronous motor 20 is in the low output state C1.
  • a pattern is a combination of positive and negative assignments of currents to windings 41 of multiple phases.
  • each of the windings 41 of multiple phases belongs to one of the u-phase, v-phase, and w-phase
  • the direction of the current in the u-phase, the direction of the current in the v-phase, and the direction of the current in the w-phase orientation constitutes a pattern.
  • the control device 60 causes the switching unit 51 to flow the current in the direction of the combination of "Pattern 1" as the initial pattern to the windings 41 belonging to the u-phase, v-phase, and w-phase. to control.
  • "Pattern 1" as the initial pattern does not change during the low power state C1.
  • controller 60 continues the initial pattern.
  • the directions of the currents in the windings 41 belonging to the u-phase, the v-phase, and the w-phase do not change, but the magnitudes of the currents in the respective windings 41 change.
  • a period PA in part (d) of FIG. 1 is a period during which the rotor 30 rotates by a rotation angle corresponding to one of the plurality of magnetic pole pairs 38 .
  • the duration of the low power state C1 is shorter than the duration PA.
  • the control device 60 maintains the low output state C ⁇ b>1 for a period shorter than the period PA during which the rotor 30 rotates by the rotation angle corresponding to one of the plurality of magnetic pole pairs 38 .
  • the plurality of switching units 51 are controlled to make the output of the permanent magnet synchronous motor 20 greater than in the zero output state C0 and less than in the high output state C2.
  • control of controller 60 transitions to high power state C2.
  • the control device 60 sequentially switches the positive and negative patterns of the currents flowing through the windings 41 of the multiple phases in the switching unit 51 .
  • the control device 60 switches patterns from the initial pattern.
  • the control device 60 continues the initial pattern for a certain period even after transitioning to the high output state C2. That is, before and after the transition from the low output state C1 to the high output state C2, the plurality of switching units 51 are controlled so that the pattern continues.
  • the rotor 30 does not stop. That is, the rotation of the rotor 30 is maintained.
  • the rotor 30 in the stopped state rotates by an angle smaller than the rotation angle corresponding to one of the magnetic pole pairs 38, and is wound to output a small output.
  • Current flows to line 41 .
  • the rotor 30 will not generate the magnetic field generated in the high-output state C2. easy to follow. That is, the rotation of the rotor 30 smoothly accelerates from the start.
  • the orientation of the rotor 30 is the ideal orientation in the zero output state C0
  • the rotor 30 immediately follows the orientation of the magnetic field formed by the current in the low output state C1 and exerts a rotational force. Can receive. That is, the rotor 30 continues to accelerate more smoothly from the start of rotation. Therefore, it is possible to suppress the delay in the time taken to start the engine. Therefore, the time required for starting the engine can be shortened without increasing the size of the permanent magnet type synchronous motor 20 .
  • FIG. 2 is a cross-sectional view showing an engine unit in an application example of the straddle-type vehicle 1 shown in FIG.
  • elements common to those in FIG. This application example can be applied to both a second embodiment and a third embodiment described later.
  • the engine unit EU shown in FIG. 2 includes a variable load four-stroke engine 10 and a permanent magnet synchronous motor 20 .
  • the engine unit EU is also provided with a clutch 18 and a transmission 19 .
  • the load-variable four-stroke engine 10 shown in FIG. 2 is a single-cylinder engine.
  • a variable load four-stroke engine 10 includes a crankcase 11 , a cylinder 12 , a piston 13 , a connecting rod 14 and a crankshaft 15 .
  • the piston 13 is provided in the cylinder 12 so as to be able to reciprocate.
  • the crankshaft 15 is rotatably provided within the crankcase 11 .
  • Crankshaft 15 is connected to piston 13 via connecting rod 14 .
  • a cylinder head 16 is attached to the upper portion of the cylinder 12 .
  • a combustion chamber is formed by the cylinder 12 , the cylinder head 16 and the piston 13 .
  • the crankcase 11 and the cylinder 12 are configured to be internally lubricated with oil.
  • the cylinder head 16 is provided with exhaust valves and intake valves (not shown).
  • the load-variable four-stroke engine 10 is also provided with a spark plug 17, a fuel injection device J (eg, see FIG. 5), and a throttle valve (not shown).
  • the throttle valve adjusts the amount of air supplied into the cylinder 12 according to the degree of opening.
  • a fuel injector J supplies fuel to the combustion chamber within the cylinder 12 .
  • a mixture of air passing through the throttle valve and fuel injected from the fuel injector J is supplied to the combustion chamber in the cylinder 12 .
  • the intake valve controls the supply of the air-fuel mixture to the combustion chamber within cylinder 12 .
  • the spark plug 17 ignites the air-fuel mixture in the cylinder 12 to burn the air-fuel mixture.
  • a permanent magnet synchronous motor 20 is attached to one end 15 a of the crankshaft 15 .
  • the permanent magnet synchronous motor 20 shown in FIG. 2 is arranged inside the crankcase 11 together with the crankshaft 15 .
  • a permanent magnet type synchronous motor 20 is provided so as to be in contact with engine oil.
  • the load-variable four-stroke engine 10 outputs rotational force through a combustion operation that burns an air-fuel mixture.
  • the piston 13 is moved by combustion of a mixture containing fuel supplied to the combustion chamber.
  • the piston 13 reciprocates by combustion of the air-fuel mixture.
  • a crankshaft 15 rotates in conjunction with the reciprocating motion of the piston 13 .
  • Rotational force, that is, power is output to the outside of the variable load four-stroke engine 10 via the crankshaft 15 .
  • the power of the crankshaft 15 is transmitted to the wheels 3b (see FIG. 1) via the clutch 18 and the transmission 19.
  • the straddle-type vehicle 1 is driven by wheels 3b (see FIG. 1) that receive power from a load-variable four-stroke engine 10 via a crankshaft 15.
  • FIG. 1 As shown in FIG.
  • FIG. 3 is an explanatory diagram that schematically shows the relationship between the crank angle position and the load torque of a load-variable four-stroke engine.
  • the load torque is the torque required to rotate the crankshaft 15 when the load varying four-stroke engine 10 is not in combustion operation.
  • a variable load four-stroke engine 10 has a high load region TH and a low load region TL in a combustion cycle corresponding to four strokes in combustion operation.
  • the high load region TH is a region in one combustion cycle of the variable load four-stroke engine 10 in which the load torque is higher than the average value Av of the load torque in one combustion cycle.
  • the low load region TL is wider than the high load region TH. More specifically, the low load area TL is wider than the high load area TH. In other words, the rotation angle range corresponding to the low load range TL is wider than the rotation angle range corresponding to the high load range TH.
  • the variable load four-stroke engine 10 rotates while repeating a combustion stroke (expansion stroke), an exhaust stroke, an intake stroke, and a compression stroke. The compression stroke has an overlap with the high load region TH.
  • One combustion cycle of the variable load four-stroke engine 10 includes one combustion stroke, one exhaust stroke, one intake stroke, and one compression stroke.
  • an air-fuel mixture is supplied to the combustion chamber.
  • piston 13 compresses the air-fuel mixture in the combustion chamber.
  • the air-fuel mixture ignited by the ignition plug 17 burns and pushes the piston 13 .
  • exhaust stroke exhaust gas after combustion is discharged from the combustion chamber.
  • the high load torque in the high load region TH is mainly caused by the reaction force of the air-fuel mixture compression.
  • FIG. 4 is a sectional view showing a section perpendicular to the rotational axis of the permanent magnet type synchronous motor 20 shown in FIG.
  • the permanent magnet synchronous motor 20 shown in FIGS. 2 and 4 also has a function of generating electric power by being driven by the variable load four-stroke engine 10 during combustion operation, for example.
  • the permanent magnet synchronous motor 20 functions both as a starting motor for starting the load varying four-stroke engine 10 and as a generator driven by the load varying four-stroke engine 10 to generate electricity.
  • the permanent magnet type synchronous motor 20 is a motor generator.
  • the permanent magnet synchronous motor 20 is a three-phase brushless motor.
  • the permanent magnet synchronous motor 20 has a rotor 30 and a stator 40 .
  • the permanent magnet synchronous motor 20 is of the outer rotor type. That is, the rotor 30 is an outer rotor.
  • Stator 40 is an inner stator.
  • the rotor 30 has a rotor body portion 31 .
  • the rotor main body 31 is a bottomed tubular member made of, for example, a ferromagnetic material.
  • the rotor main body 31 is directly connected to the crankshaft 15 .
  • the rotor 30 is thereby directly connected to the crankshaft 15 of the variable load four-stroke engine 10 . That is, the rotor 30 and the crankshaft 15 have a common rotational axis.
  • the rotor 30 is not provided with windings to which current is supplied.
  • the rotor 30 has permanent magnets 37 .
  • the rotor 30 has a plurality of magnetic poles 37a. A plurality of magnetic poles 37 a are formed by permanent magnets 37 .
  • a plurality of magnetic poles 37 a are provided on the inner peripheral surface of the back yoke portion 34 .
  • the plurality of magnetic poles 37 a are provided outside the stator 40 in the radial direction of the permanent magnet synchronous motor 20 .
  • the rotor 30 shown in FIG. 4 has multiple permanent magnets 37 .
  • the plurality of magnetic poles 37a are provided in each of the plurality of permanent magnets 37, for example.
  • the permanent magnet 37 can also take a configuration formed by, for example, one ring-shaped magnet. In this case, one ring-shaped magnet is magnetized such that a plurality of magnetic poles 37a are aligned on the inner peripheral surface.
  • the permanent magnet 37 may be composed of arcuate magnet blocks, the number of which is smaller than that of the plurality of magnetic poles 37a.
  • the plurality of magnetic poles 37 a are provided so that N poles and S poles are alternately arranged in the circumferential direction of the permanent magnet type synchronous motor 20 .
  • Two adjacent magnetic poles 37 a form a magnetic pole pair 38 .
  • Permanent magnet synchronous motor 20 has a plurality of magnetic pole pairs 38 .
  • the rotation angle corresponding to one of the pole pairs 38 is the base angle R.
  • the rotor 30 has 24 magnetic poles.
  • the number of magnetic poles of the rotor 30 refers to the number of magnetic poles 37 a facing the stator 40 . No magnetic material is provided between the magnetic poles 37 a and the stator 40 .
  • a nonmagnetic cover for example, may be provided between the magnetic poles 37a and the stator 40 .
  • the stator 40 has multiple windings 41 and a stator core 42 .
  • the stator core 42 has a plurality of teeth 43 spaced apart in the circumferential direction.
  • the plurality of teeth 43 extend radially outward of the stator core 42 .
  • a total of 18 teeth 43 are circumferentially spaced.
  • the stator core 42 has a total of 18 slots SL spaced apart in the circumferential direction.
  • the tooth portions 43 are arranged at regular intervals in the circumferential direction.
  • the permanent magnet type synchronous motor 20 has more magnetic poles 37a than 2/3 of the number of teeth 43.
  • the winding 41 has a larger inductance than, for example, the case where the number of magnetic poles 37a is less than 2 ⁇ 3 of the number of teeth 43 . Therefore, the temperature rise of the permanent magnet synchronous motor 20 during power generation is suppressed.
  • a winding 41 is wound around each tooth 43 . That is, the multi-phase windings 41 are provided so as to pass through the slots SL.
  • FIG. 4 shows the winding 41 in the slot SL.
  • Each of the multi-phase windings 41 belongs to one of the U-phase, V-phase, and W-phase.
  • the windings 41 are arranged, for example, in order of U-phase, V-phase, and W-phase.
  • the rotor 30 rotates by supplying the winding 41 with a current that changes periodically. For example, the rotor 30 rotates when a sinusoidal current or a square wave current that changes periodically flows through the windings 41 .
  • the rotor 30 rotates by a basic angle R corresponding to one cycle (360 degrees) of change in the current flowing through the winding 41 .
  • the basic angle R is also referred to as 360 degrees in electrical angle.
  • FIG. 5 is a block diagram showing a schematic electrical configuration of the engine unit shown in FIG. 2 and its surroundings.
  • a control device 60 provided in the straddle-type vehicle 1 controls each part of the straddle-type vehicle 1 including the inverter 50 .
  • the permanent magnet type synchronous motor 20 and the battery 5 are connected to the inverter 50 .
  • the battery 5 supplies power to the permanent magnet synchronous motor 20 when the permanent magnet synchronous motor 20 operates as a motor. Also, the battery 5 is charged with electric power generated by the permanent magnet synchronous motor 20 .
  • the inverter 50 has a plurality of switching units 51 .
  • a switching unit 51 shown in FIG. 5 constitutes a three-phase bridge inverter.
  • the plurality of switching units 51 are connected to each phase of the multi-phase windings 41 . More specifically, among the plurality of switching units 51, two switching units 51 connected in series form a half bridge. Each phase half bridge is connected in parallel to the battery 5 .
  • the switching units 51 that form the half bridges of the respective phases are connected to the respective phases of the windings 41 of the multiple phases.
  • the switching unit 51 controls current flowing between the battery 5 and the permanent magnet synchronous motor 20 . Specifically, the switching unit 51 switches between passage/interruption of current between the battery 5 and the multi-phase windings 41 . More specifically, the ON/OFF operation of the switching unit 51 switches between energization and discontinuation of each of the multiple-phase windings 41 . When the permanent magnet type synchronous motor 20 functions as a generator, the ON/OFF operation of the switching unit 51 switches between the passage/interruption of the current between each of the windings 41 and the battery 5 . By sequentially switching on and off of the switching unit 51, rectification and voltage control of the three-phase alternating current output from the permanent magnet synchronous motor 20 are performed. The switching unit 51 controls current output from the permanent magnet synchronous motor 20 to the battery 5 .
  • the control device 60 controls the switching section 51 by pulse width modulation (PWM). Thereby, the control device 60 controls the current flowing through the winding 41 .
  • the control device 60 controls the switching section 51 so that the winding 41 is sinusoidally driven.
  • sine wave driving the control device 60 turns on and off the switching units 51 so that a sine wave current flows through each winding 41 of the permanent magnet synchronous motor 20 .
  • the control device 60 dynamically changes the duty ratio of the switching unit 51 corresponding to each stator winding W to cause a sinusoidal current to flow through each winding 41 .
  • the control device 60 causes a sinusoidal current to flow through the stator windings W by turning on and off the switching section 51 in a cycle shorter than one cycle of the electrical angle.
  • the currents flowing through the windings 41 of the three phases are maximized in sequence and minimized in sequence, like the waveforms of the three-phase alternating current.
  • a current always flows through one of the windings 41 .
  • the control device 60 changes the duty ratio of the switching section 51 from about 0% to about 100% according to the height of the sine wave within one period of the sine wave.
  • the control device 60 makes the duty ratio of the PWM control in the low output state C1 smaller than the duty ratio in the high output state C2, so that the permanent magnet synchronous motor 20 is controlled in the high output state C2 in the low output state C1.
  • the control device 60 controls the switching unit so that the output of the permanent magnet synchronous motor 20 in the low output state C1 is smaller than the force with which the crankshaft 15 overcomes the high load region of the variable load four-stroke engine 10. 51 is controlled. More specifically, in the low output state C1, the control device 60 sets the duty ratio of the switching section 51 to about 30% centered at 50%, for example, according to the height of the sine wave within one period of the sine wave. % range, ie from about 35% to about 65%. In this case, the current flowing through each winding 41 in the low output state C1 is 1 ⁇ 3 of the current in the high output state C2.
  • the output of the permanent magnet synchronous motor 20 in the low output state C1 is 1 ⁇ 3 of the output of the permanent magnet synchronous motor 20 in the high output state C2.
  • Sinusoidal drive suppresses the output of the current component that does not contribute to the generation of the rotational force, resulting in high power utilization efficiency.
  • the control device 60 may control the switching section 51 so as to drive the winding 41 with a square wave, for example.
  • the control device 60 turns on and off the plurality of switching units 51 at timing according to the 120-degree conduction method.
  • the 120-degree energization method is a method in which an energization suspension period is provided for each phase of the multi-phase winding 41 and intermittent energization is performed at an energization angle of less than 180 degrees.
  • a current equivalent to the maximum value always flows through one of the windings 41 .
  • the control device 60 maintains the duty ratio of the switching section 51 at approximately 100% during the current supply period within one cycle of the square wave.
  • the control device 60 maintains the duty ratio of the switching section 51 at about 30% during the current supply period within one cycle of the square wave.
  • the current flowing through each winding 41 in the low output state C1 is 1 ⁇ 3 of the current in the high output state C2.
  • the output of the permanent magnet synchronous motor 20 in the low output state C1 is 1 ⁇ 3 of the output of the permanent magnet synchronous motor 20 in the high output state C2.
  • Sinusoidal drive is easier to control.
  • computing devices with lower processing power can also be utilized.
  • the degree of design autonomy of the control device 60 is high.
  • Each of the switching units 51 has a switching element.
  • the switching unit 51 is, for example, a transistor, more specifically an FET (Field Effect Transistor).
  • the fuel injection device J, the spark plug 17 and the battery 5 are connected to the control device 60 .
  • a rotor position detection device 70 is also connected to the control device 60 .
  • the control device 60 acquires the rotational position and rotational speed of the crankshaft 15 from the detection result of the rotor position detection device 70 .
  • the control device 60 controls the operation of the permanent magnet synchronous motor 20 by controlling the ON/OFF operation of each switching unit 51 .
  • the starting power generation control unit 62 includes a start control unit 621 and a power generation control unit 622 .
  • the combustion control unit 63 controls the combustion operation of the load variation four-stroke engine 10 by controlling the spark plug 17 and the fuel injection device J.
  • the control device 60 is composed of a computer having a central processing unit 60a and a storage device 60b.
  • the central processing unit 60a performs arithmetic processing based on the control program.
  • the storage device 60b stores data relating to programs and operations.
  • Control of the controller 60 is realized by a computer having a central processing unit 60a and a storage device 60b and a control program executed by the computer.
  • the portion that controls the fuel injection device J and the spark plug 17 may be configured separately from the control device 60 that controls the switching unit 51 as a separate device, or may be configured integrally. good.
  • FIG. 6 is a flowchart for explaining the operation related to starting the load-variable four-stroke engine shown in FIG.
  • the control device 60 controls the permanent magnet synchronous motor 20 to the zero output state C0 (S11).
  • the rotor 30 is stopped. That is, the crankshaft 15 is stopped.
  • the control device 60 causes the switching unit 51 to supply current to the multi-phase windings 41 so that the permanent magnet synchronous motor 20 starts rotating in the low output state C1. to start.
  • the control device 60 controls the switching section 51 in the low output state C1 during the low output period.
  • the control device 60 controls the switching unit 51 so that the current flows through the windings 41 of the U-phase, the V-phase, and the W-phase, for example, in the direction of "Pattern 1" (see FIG. 1).
  • the low output period C ⁇ b>1 is a period during which the rotor 30 rotates through an angle smaller than the rotation angle corresponding to one of the plurality of magnetic pole pairs 38 .
  • the low output period C1 is a period set based on the operating characteristics of the load variation four-stroke engine 10 and the permanent magnet synchronous motor 20, for example.
  • the low output period C1 may be set, for example, by detecting that the rotor 30 actually rotates through a predetermined angle smaller than the rotation angle corresponding to one of the magnetic pole pairs 38 .
  • the control device 60 causes the switching unit 51 to supply current to the multi-phase windings 41 so that the permanent magnet synchronous motor 20 accelerates the rotation in the high output state C2. supply.
  • the control device 60 maintains “pattern 1” (see FIG. 1) as the direction of current flow to the U-phase, V-phase, and W-phase windings 41, and then switches the pattern.
  • the control device 60 controls the switching section 51 so that the permanent magnet synchronous motor 20 outputs a larger output than in the low output state C1.
  • the control device 60 ends the control in the high output state C2. As a result, the control device 60 stops the power output from the permanent magnet synchronous motor 20 .
  • FIG. 7 is a time chart showing changes in the current supplied to the multi-phase windings 41 under the control of the control device shown in FIGS.
  • the chart in FIG. 7 shows the currents Iu, Iv, and Iw of the U-phase, V-phase, and W-phase windings 41 when sinusoidal drive is employed.
  • the chart in FIG. 7 also shows the control state of the permanent magnet type synchronous motor 20 and the magnitude of the output corresponding to the state.
  • the chart of FIG. 7 also shows the pattern transitions of the combinations of the currents Iu, Iv, and Iw of the U-phase, V-phase, and W-phase windings 41, respectively.
  • the control device 60 controls the switching section 51 to the zero output state C0.
  • the rotor 30 does not rotate and is stopped.
  • the permanent magnet type synchronous motor 20 does not output power.
  • the control device 60 When the start instruction is input at time t0, the control device 60 causes the switching unit 51 to apply current to the multi-phase windings 41 so that the permanent magnet synchronous motor 20 is in the low output state C1.
  • the control device 60 controls the switching section 51, for example, so that the winding 41 is sinusoidally driven.
  • the range in which the duty ratio changes is limited to 30% of that in the high output state C2.
  • the output of the permanent magnet synchronous motor 20 in the low output state C1 is smaller than the output in the high output state C2.
  • the output of the permanent magnet synchronous motor 20 in the low output state C1 is 30% of the output in the high output state C2.
  • the direction of the current Iu in the U-phase winding 41 is positive in the low output state C1.
  • the direction of the current Iv in the V-phase winding 41 is negative.
  • the direction of the current Iw in the W-phase winding 41 is negative.
  • a combination of these current directions is referred to as "pattern 1".
  • the control device 60 continues the low output state C1 for the low output period from time t0 to t1, which is shorter than one cycle PA of the electrical angle.
  • the controller 60 maintains "pattern 1" during the low output period from time t0 to t1.
  • the controller 60 causes the permanent magnet synchronous motor 20 to output a small output in the low output state C1 during periods when the rotor 30 rotates by an angle less than the basic angle R (see FIG.
  • the switching unit 51 is controlled as follows. Therefore, when a start instruction is input, current flows through the windings 41, causing the stopped rotor 30 to start rotating. Since the current flows through the winding 41 in the low output state C1, the rotor 30 starts rotating with a relatively weak rotational force and a low speed. The rotation angle of the rotor 30 in the low output state C1 is smaller than the basic angle R (see FIG. 4).
  • the control device 60 causes the switching unit 51 to apply current to the multi-phase windings 41 so that the permanent magnet synchronous motor 20 is in the high output state C2. Controller 60 causes current to flow through winding 41 by varying the duty ratio without limiting the duty ratio as in low output state C1.
  • the controller 60 first maintains "Pattern 1".
  • the control device 60 switches the pattern of the direction of current in order of "pattern 2", “pattern 3", and "pattern 4" with "pattern 1" as the initial state. Switching of the combination of current directions is performed with a sinusoidal current change.
  • the output of the permanent magnet synchronous motor 20 in the high output state C2 is smaller than the output in the low output state C1. Rotation of the rotor 30 accelerates in the high output state C2. That is, the rotation of the crankshaft 15 is accelerated.
  • the rotor 30 in the stopped state rotates at an angle smaller than the basic angle R (see FIG. 4) so that a small output is output during the low output period.
  • a current flows through winding 41 .
  • the rotational fluctuation of the rotor 30 is suppressed. Therefore, in the high-output state C2 following the low-output state C1, when the direction of the current of each phase is sequentially switched while the current that increases the output is flowing, the rotor 30 will not generate the magnetic field generated in the high-output state C2. easy to follow. Therefore, the time required for starting the engine can be shortened without increasing the size of the permanent magnet type synchronous motor 20 .
  • FIG. 8 is a time chart showing the output of the permanent magnet type synchronous motor when starting the engine according to the second embodiment.
  • the control device 60 in this embodiment controls the switching section 51 so that the power output from the permanent magnet synchronous motor 20 gradually increases in the low output state C1.
  • FIG. 9 is a time chart showing the output of the permanent magnet synchronous motor when starting the engine according to the third embodiment.
  • the control device 60 in this embodiment controls the switching section 51 so that the power output from the permanent magnet synchronous motor 20 gradually increases from zero in the low output state C1.
  • Reference Signs List 1 Straddle-type vehicle 10: Variable load four-stroke engine 15: Crankshaft 20: Permanent magnet type synchronous motor 30: Rotor 37: Permanent magnet 37a: Magnetic pole 38: Magnetic pole pair 40: Stator 41: Winding 50: Inverter 51 : Switching unit 60 : Control device C0 : Zero output state C1 : Low output state C2 : High output state

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Control Of Eletrric Generators (AREA)
PCT/JP2021/040794 2021-11-05 2021-11-05 ストラドルドビークル Ceased WO2023079686A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2021/040794 WO2023079686A1 (ja) 2021-11-05 2021-11-05 ストラドルドビークル
JP2023557543A JP7603839B2 (ja) 2021-11-05 2021-11-05 ストラドルドビークル

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/040794 WO2023079686A1 (ja) 2021-11-05 2021-11-05 ストラドルドビークル

Publications (1)

Publication Number Publication Date
WO2023079686A1 true WO2023079686A1 (ja) 2023-05-11

Family

ID=86240889

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/040794 Ceased WO2023079686A1 (ja) 2021-11-05 2021-11-05 ストラドルドビークル

Country Status (2)

Country Link
JP (1) JP7603839B2 (https=)
WO (1) WO2023079686A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000034649A1 (en) * 1998-12-09 2000-06-15 Mitsuba Corporation Starting device for internal combustion engines and starting control device
JP2007100705A (ja) * 2000-07-11 2007-04-19 Aisin Aw Co Ltd 駆動装置
JP2011219057A (ja) * 2010-04-14 2011-11-04 Toyota Motor Corp ハイブリッド車両のエンジン始動制御装置
JP2012086783A (ja) * 2010-10-22 2012-05-10 Nissan Motor Co Ltd ハイブリッド車両の始動制御装置
JP2018053776A (ja) * 2016-09-28 2018-04-05 ヤマハ発動機株式会社 エンジンユニット及び鞍乗型車両

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000034649A1 (en) * 1998-12-09 2000-06-15 Mitsuba Corporation Starting device for internal combustion engines and starting control device
JP2007100705A (ja) * 2000-07-11 2007-04-19 Aisin Aw Co Ltd 駆動装置
JP2011219057A (ja) * 2010-04-14 2011-11-04 Toyota Motor Corp ハイブリッド車両のエンジン始動制御装置
JP2012086783A (ja) * 2010-10-22 2012-05-10 Nissan Motor Co Ltd ハイブリッド車両の始動制御装置
JP2018053776A (ja) * 2016-09-28 2018-04-05 ヤマハ発動機株式会社 エンジンユニット及び鞍乗型車両

Also Published As

Publication number Publication date
JP7603839B2 (ja) 2024-12-20
JPWO2023079686A1 (https=) 2023-05-11

Similar Documents

Publication Publication Date Title
CN105849404B (zh) 发动机单元和车辆
CN105247778B (zh) 在车辆中使用的四冲程发动机单元和车辆
TWI528680B (zh) Engine unit and vehicle
EP3051118B1 (en) Engine unit and vehicle
TWI682863B (zh) 車輛
TWI788379B (zh) 車輛
TW201814152A (zh) 引擎單元及跨坐型車輛
TWI646008B (zh) Straddle type vehicle
JP2017036666A (ja) エンジンユニット
JP7603839B2 (ja) ストラドルドビークル
JP2017129065A (ja) ビークル
TWI624585B (zh) vehicle
JP2018053773A (ja) 鞍乗型車両
TWI660118B (zh) vehicle
JP7258147B2 (ja) ストラドルドビークル
JP2019054559A (ja) ビークル
TWI682864B (zh) 車輛
JP2015117677A (ja) エンジンユニット、及び車両
JP2017036665A (ja) エンジンユニット
CN105705771B (zh) 发动机单元及车辆
JP2017131041A (ja) ビークル
OA17770A (en) Engine unit and vehicle

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21963281

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2401002430

Country of ref document: TH

ENP Entry into the national phase

Ref document number: 2023557543

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 202427034858

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 12024551087

Country of ref document: PH

122 Ep: pct application non-entry in european phase

Ref document number: 21963281

Country of ref document: EP

Kind code of ref document: A1