WO2022137530A1 - Circuit d'alimentation électrique - Google Patents

Circuit d'alimentation électrique Download PDF

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Publication number
WO2022137530A1
WO2022137530A1 PCT/JP2020/048820 JP2020048820W WO2022137530A1 WO 2022137530 A1 WO2022137530 A1 WO 2022137530A1 JP 2020048820 W JP2020048820 W JP 2020048820W WO 2022137530 A1 WO2022137530 A1 WO 2022137530A1
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WO
WIPO (PCT)
Prior art keywords
voltage
power supply
battery
supply circuit
coil
Prior art date
Application number
PCT/JP2020/048820
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English (en)
Japanese (ja)
Inventor
和征 榊原
Original Assignee
株式会社EViP
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 株式会社EViP filed Critical 株式会社EViP
Priority to PCT/JP2020/048820 priority Critical patent/WO2022137530A1/fr
Publication of WO2022137530A1 publication Critical patent/WO2022137530A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present invention relates to a power supply circuit.
  • Patent Document 1 discloses a technique for suppressing voltage fluctuations in a power line to a three-phase motor.
  • the main object of the present invention is to provide a technique capable of suppressing a discharge current from a battery power source.
  • the main invention of the present invention for solving the above problems is a power supply circuit, which comprises a plurality of independent closed circuits for each of the coils, which supply AC power from a battery power source to a plurality of coils for driving a motor. It is characterized by comprising a synchronization mechanism for synchronizing the voltage phase to the coil between the closed circuits.
  • the discharge current from the battery power source can be suppressed.
  • FIG. 1 A plurality of independent closed circuits for each of the coils, which supply AC power from a battery power source to a plurality of coils for driving a motor.
  • a synchronization mechanism that synchronizes the voltage phase to the coil between the closed circuits,
  • a power supply circuit characterized by being equipped with.
  • the battery power source is a battery module having a battery cell group composed of a plurality of lithium ion secondary battery cells.
  • the number of battery modules shall be the same as any of the number of phases of the coil, the number of poles of the coil, or the number of motors.
  • FIG. 3 The power supply circuit according to item 1 or 2.
  • Each of the closed circuits comprises an inverter applied to the corresponding coil. The signal shall be transmitted and received between the inverters.
  • the conventional motor system 100 uses a low voltage power line 3 to boost a DC voltage output by a battery module 2 having a battery cell group 1 composed of a plurality of lithium ion secondary battery cells.
  • the boost converter 4 boosts and converts the input DC voltage to a high-voltage DC voltage of a desired magnification, and applies the high-voltage DC voltage to the 3-phase inverter 6 via the high-voltage power line 5.
  • the 3-phase inverter 6 converts the high-voltage DC voltage input from the boost converter 4 into a 3-phase AC voltage, and converts the 3-phase AC voltage into a 3-phase (U-phase, V-phase,) for generating a rotating magnetic field in the motor.
  • the boost converter 4 needs to output a high-voltage DC voltage of the corresponding electric power (voltage ⁇ current).
  • the current flowing from the battery module 2 to the boost converter 4 via the low voltage power line 3 is the sum of the currents flowing through the magnetic pole coils for the three phases multiplied by the inverse of the power conversion efficiency of the three-phase inverter 6.
  • the magnetic pole coils 7U, 7V, and 7W each have a configuration in which two magnetic pole coils are connected in series per phase, but the two magnetic pole coils are collectively referred to as an excitation coil. can.
  • the motor system 101 of the first embodiment of the present invention has a battery module 2U, a battery module 2V, and a battery module 2W each having a battery cell group 1 composed of a plurality of lithium ion secondary battery cells.
  • the DC voltage output by is independently applied to the boost converter 4U, the boost converter 4V, and the boost converter 4W via the low voltage power line 3U, the low voltage power line 3V, and the low voltage power line 3W.
  • the boost converter 4U, boost converter 4V, and boost converter 4W convert the input DC voltage into a high voltage DC voltage of a desired magnification, and convert the high voltage DC voltage into a high voltage power line 5U and a high voltage power line.
  • the inverter 6U, the inverter 6V, and the inverter 6W convert the input high-voltage DC voltage into an AC voltage and convert the single-phase AC voltage into three phases in the motor, the magnetic pole coil 7U, the magnetic pole coil 7V, and the magnetic pole coil 7V.
  • Each of the magnetic pole coils 7W is applied to generate a rotating magnetic field between the magnetic pole coils to control the rotation of the rotor.
  • a mechanism for synchronizing the phase of the AC voltage between the inverters 6U, 6V and 6W is provided.
  • the phases are synchronized so as to be offset by a predetermined angle, for example 60 °, 120 °, etc.
  • the angle of phase can be adjusted to any angle according to the motor control.
  • the insulating signal is transmitted and received between the inverters 6U and 6V and between the inverters 6V and 6W.
  • the insulating signal shifts the phase of the three single-phase AC voltages output from the three inverters to a desired electric angle to generate a rotating magnetic field between the three-phase magnetic pole coils in the motor to control the rotation of the rotor. Used to do. As shown in FIG.
  • insulating communication lines 8a, 8b and 8g are arranged between the inverters 6U and 6V and between the inverters 6V and 6W, respectively.
  • the insulating communication line 8g can be a ground line.
  • one of the inverters 6U and 6V (host side) applies a voltage to the light emitting portion of the photocoupler 8H, and the other (slave side) detects the voltage of the light receiving portion of the photocoupler 8S for insulation.
  • Digital communication is established.
  • the light receiving unit outputs or stops the voltage according to the light emission or stop of the light emitting unit inside the photocoupler 8, and transmits the high and low waveforms of the voltage to the slave side as a predetermined insulating communication signal.
  • an AC voltage can be output and the AC voltage can be applied to the magnetic pole coil 7 by PWM switching control or the like according to an instruction of an insulating communication signal received from the host side via the photocoupler 8. That is, the host side can collectively control the AC voltage outputs of the two phases so as to shift the phases of the AC voltage applied to the magnetic pole coil 7U and the magnetic pole coil 7V to a desired electric angle. At this time, it is preferable that the switching frequency of the insulating communication signal from the host side to the slave side is sufficiently higher than the switching frequency of the PWM control.
  • the motor system 102 of the second embodiment of the present invention does not include the three boost converters of the motor system 101 of the first embodiment.
  • 2V and the battery module 2W replace the three boost converters with a high voltage DC voltage via the high voltage power line 5U, high voltage power line 5V, and high voltage power line 5W, and the inverter 6U, inverter 6V, And, it is applied directly to the inverter 6W, respectively.
  • the inverter 6U, the inverter 6V, and the inverter 6W each input the high DC voltage, convert it into an AC voltage, and convert the single-phase AC voltage into three phases in the motor, the magnetic pole coil 7U, the magnetic pole coil 7V, and the magnetic pole coil 7V.
  • Each of the magnetic pole coils 7W is applied to generate a rotating magnetic field between the magnetic pole coils to control the rotation of the rotor.
  • Insulation signals are transmitted and received between the inverters 6, and control is performed so as to shift the phases of the three single-phase AC voltages output from the three inverters to a desired electric angle, whereby the three phases in the motor are controlled.
  • a rotating magnetic field can be generated between the magnetic pole coils of the rotor to control the rotation of the rotor.
  • the motor system 102 of the second embodiment of the present invention does not require a boost converter 4 for collectively supplying electric power to a three-phase inverter and a magnetic pole coil unlike the motor system 100 of the prior art. That is, it does not require a large current to be discharged from the battery power source, the number of large current energized parts in the system is reduced, the power transmission efficiency in the system is increased, and the cruising distance per charge is extended. Further, since each of the battery module 2U, the battery module 2V, and the battery module 2W of the motor system 102 does not require the discharge of a large current as in the battery module 2 of the motor system 100, the ratings of the three battery modules are used.
  • the capacity and discharge rated current can be reduced, the cost of the battery module can be reduced, and even if the number of battery modules used in the motor system 102 increases from that of the motor system 100, a large current can be energized in the system with the cost reduction effect by standardizing parts.
  • the number of parts to be used is reduced, and the total cost of the system can be reduced. Therefore, it is possible to achieve both an extension of the cruising range per charge and a cost reduction of the electric vehicle equipped with the motor system 102.
  • the three-phase inverter 6 of the motor system 100 has a divergence portion, that is, a substantially parallel connection portion, in which the current input in the circuit is diverted in the direction of the three phases.
  • the input current required by 6 that is, the discharge current output by the battery module 2 via the boost converter 4
  • the current flowing through each closed circuit that is, the input current required by each inverter, is about the number of inverters, which is about the number of poles of the magnetic pole coil (6 poles).
  • the number of inverters should be equal to or less than the number of phases of the exciting coil or the number of poles of the magnetic pole coil, preferably close to the same number, and the number of battery power supplies should be about the number of the number of inverters.
  • the motor system may be grasped as a power circuit for supplying electric power to the motor or as a drive circuit for driving the motor.
  • the motor system of the present embodiment is, for example, a motor system in which a motor is driven by a battery power source, and the battery power source is a battery module having a battery cell group composed of a plurality of lithium ion secondary battery cells.
  • the motor system includes a motor that rotates a rotor by applying an AC voltage to a plurality of exciting coils or magnetic pole coils, and a plurality of the battery modules, and the number of the battery modules is the number of the exciting coils of the motor.
  • the power supply circuit from the battery module to the motor, the exciting coil of the motor, or the magnetic pole coil is equal to or less than the number of phases, the number of poles of the magnetic pole coil, or the number of the motors.
  • the motor system may be a plurality of independent closed circuits, or at least one closed circuit that does not include a diversion portion or a boosting portion in the power supply circuit.
  • the phase of the AC voltage is synchronized by transmitting and receiving an insulating signal between the inverters 6, but the present invention is not limited to this, and for example, the main controllers are three inverters 6U, 6V and 6W. It is also possible to individually send a control (communication) signal to each inverter and output a desired waveform individually from each of the inverters 6U, 6V and 6W.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Inverter Devices (AREA)

Abstract

Le problème décrit par la présente invention est de permettre de supprimer le courant de décharge d'une alimentation électrique de batterie. La solution selon l'invention porte sur un circuit d'alimentation électrique qui comprend une pluralité de circuits fermés qui fournissent un courant alternatif d'une alimentation électrique de batterie à une pluralité de bobines pour entraîner un moteur et qui sont indépendants pour chaque bobine, et un mécanisme de synchronisation qui synchronise la phase de tension avec les bobines entre les circuits fermés.
PCT/JP2020/048820 2020-12-25 2020-12-25 Circuit d'alimentation électrique WO2022137530A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/048820 WO2022137530A1 (fr) 2020-12-25 2020-12-25 Circuit d'alimentation électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/048820 WO2022137530A1 (fr) 2020-12-25 2020-12-25 Circuit d'alimentation électrique

Publications (1)

Publication Number Publication Date
WO2022137530A1 true WO2022137530A1 (fr) 2022-06-30

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ID=82157943

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/048820 WO2022137530A1 (fr) 2020-12-25 2020-12-25 Circuit d'alimentation électrique

Country Status (1)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012005245A (ja) * 2010-06-17 2012-01-05 Toyota Motor Corp 電気推進装置およびこれを備えた電動車両
JP2012244698A (ja) * 2011-05-17 2012-12-10 Honda Motor Co Ltd インバータ発電機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012005245A (ja) * 2010-06-17 2012-01-05 Toyota Motor Corp 電気推進装置およびこれを備えた電動車両
JP2012244698A (ja) * 2011-05-17 2012-12-10 Honda Motor Co Ltd インバータ発電機

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