WO2021054302A1 - Dispositif d'alimentation électrique, dispositif d'alimentation électrique équipé d'un câble et outil électrique - Google Patents

Dispositif d'alimentation électrique, dispositif d'alimentation électrique équipé d'un câble et outil électrique Download PDF

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Publication number
WO2021054302A1
WO2021054302A1 PCT/JP2020/034812 JP2020034812W WO2021054302A1 WO 2021054302 A1 WO2021054302 A1 WO 2021054302A1 JP 2020034812 W JP2020034812 W JP 2020034812W WO 2021054302 A1 WO2021054302 A1 WO 2021054302A1
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WO
WIPO (PCT)
Prior art keywords
power supply
supply device
main body
power
inverter
Prior art date
Application number
PCT/JP2020/034812
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English (en)
Japanese (ja)
Inventor
文昭 伊藤
Original Assignee
京セラインダストリアルツールズ株式会社
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 京セラインダストリアルツールズ株式会社 filed Critical 京セラインダストリアルツールズ株式会社
Priority to JP2021546661A priority Critical patent/JP7300513B2/ja
Publication of WO2021054302A1 publication Critical patent/WO2021054302A1/fr
Priority to JP2023100023A priority patent/JP2023123605A/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • This disclosure relates to power tools.
  • Patent Document 1 describes a technique related to a power tool.
  • a power supply device, a power supply device with a cable, and a power tool are disclosed.
  • the power supply is a power supply connected to a power tool body comprising a brushless DC motor.
  • the power supply device includes at least one of an inverter for driving a brushless DC motor and a control circuit for controlling the inverter, and a power supply unit for supplying power to the inverter.
  • the power supply device with a cable includes the above power supply device and a connection cable for connecting the power supply device and the power tool main body.
  • the power tool includes the above power supply device and a power tool main body including a brushless DC motor to which the power supply device is connected.
  • FIG. 1 is a diagram schematically showing a configuration example of the power tool 1.
  • the power tool 1 includes a power tool main body 2, a power supply device 3, a connection cable 4, and a connection cable 5.
  • the power tool 1 shown in FIG. 1 is, for example, a hand-held disc grinder.
  • the power tool 1 may be a hand-held power tool other than the disc grinder.
  • the power tool 1 may be an impact driver, a driver drill, a circular saw, a reciprocating saw, or a polisher.
  • the power tool main body 2 may be simply referred to as a main body 2.
  • the main body 2 includes a housing 20 that accommodates a plurality of parts and is gripped by a user.
  • the housing 20 houses a brushless DC motor 21, a sensor board 22, a cooling fan 23, a connector 24, and the like.
  • the main body 2 also includes a drive unit driven by a brushless DC motor 21.
  • the drive unit includes, for example, a gear unit housed in the housing 20 and a disc-shaped grindstone 25 exposed from the housing 20.
  • the gear portion transmits the rotation of the brushless DC motor 21 to the grindstone 25 by reducing its rotation speed.
  • the brushless DC motor 21 can rotate the grindstone 25 via the gear portion.
  • the power tool 1 can perform grinding, cutting, polishing, and the like by rotating the grindstone 25.
  • the brushless DC motor 21 is driven by the power supply device 3.
  • the sensor board 22 can detect the rotational position of the brushless DC motor 21. More specifically, the sensor substrate 22 can detect the rotational position of the rotor included in the brushless DC motor 21.
  • the cooling fan 23 is connected to the rotating shaft 210 of the brushless DC motor 21. The cooling fan 23 rotates as the rotating shaft 210 rotates. When the cooling fan 23 rotates, air is taken into the housing 20 from the intake port provided at the rear of the housing 20. The air taken in from the intake port cools the brushless DC motor 21 and the like in the housing 20, and then is discharged to the outside of the housing 20 from the exhaust port provided in front of the housing 20.
  • the connector 24 is partially exposed from the housing 20, and the connection cable 4 is connected to the connector 24. It can be said that the connector 24 is a connection point to which the connection cable 4 is connected.
  • the brushless DC motor 21 may be simply referred to as a motor 21.
  • the power supply device 3 is a device separate from the main body 2 and includes a housing 30 for accommodating a plurality of parts.
  • the housing 30 houses the circuit board 31, the connector 37, and the connector 38.
  • the circuit board 31 includes a board 32, a power supply unit 33 mounted on the board 32, a control circuit 34, and an inverter 35.
  • the power supply unit 33 can supply power to the inverter 35.
  • the power supply unit 33 converts, for example, an AC voltage supplied from a commercial power source into a DC voltage, and supplies the generated DC voltage to the inverter 35.
  • the power supply unit 33 can be said to be a power supply circuit.
  • the inverter 35 can drive the motor 21 included in the main body 2.
  • the control circuit 34 can control the inverter 35.
  • the connector 37 is partially exposed from the housing 30.
  • the connection cable 4 is connected to the connector 37. It can be said that the connector 37 is a connection point to which the connection cable 4 is connected.
  • the connection cable 4 extends from the housing 30 of the power supply device 3 to the housing 20 of the main body 2.
  • the length of the connection cable 4 is, for example, several tens of cm to several m. The length of the connection cable 4 is not limited to this.
  • the connector 38 is partially exposed from the housing 30.
  • the connection cable 5 is connected to the connector 38. It can be said that the connector 38 is a connection point to which the connection cable 5 is connected.
  • connection cable 4 At one end of the connection cable 4, a connector 41 connected to the connector 24 of the main body 2 is provided. At the other end of the connection cable 4, a connector 42 connected to the connector 37 of the power supply device 3 is provided. At one end of the connection cable 5, a connector 51 connected to the connector 38 of the power supply device 3 is provided. At the other end of the connection cable 5, a connector 52 connected to an outlet that supplies an AC voltage from a commercial power source is provided. The connector 52 is sometimes called a power plug.
  • connection cable 4 can be attached to and detached from the main body 2.
  • the connector 41 of the connection cable 4 is removable from the connector 24 of the main body 2.
  • the other end of the connection cable 4 is detachable from the power supply device 3.
  • the connector 42 of the connection cable 4 is removable from the connector 37 in the housing 30.
  • connection cable 5 is detachable from the power supply device 3.
  • the connector 51 of the connection cable 5 is removable from the connector 38 in the housing 30.
  • the connector 52 of the connection cable 5 is removable from the outlet.
  • the power tool 1 includes a power supply device 300 with a cable including a power supply device 3 and connection cables 4 and 5.
  • FIG. 2 is a diagram mainly showing an example of the circuit configuration of the power tool 1.
  • a single-phase AC voltage from a commercial power source is supplied to the connector 52 of the connection cable 5.
  • the AC voltage is supplied to the connector 38 of the power supply device 3 through the connection cable 5.
  • the connection cable 5 has two signal lines 50a. For example, an AC voltage having an effective value of 100 V is supplied to the connector 38.
  • the AC voltage supplied to the connector 38 is supplied to the power supply unit 33.
  • the power supply unit 33 includes an AC-DC converter 330.
  • the AC-DC converter 330 converts an AC voltage into a DC voltage and outputs it.
  • the AC-DC converter 330 is composed of, for example, a rectifier circuit, and has a diode and a capacitor.
  • the AC-DC converter 330 outputs a DC voltage of, for example, about 140V.
  • the DC voltage output by the AC-DC converter 330 is supplied to the control circuit 34. Further, the DC voltage output by the AC-DC converter 330 is supplied to the inverter 35 as a power source.
  • the inverter 35 includes, for example, six switching elements 350.
  • the switching element 350 is, for example, a FET (Field effect transistor).
  • the switching element 350 may be an IGBT (Insulated Gate Bipolar Transistor) or another element.
  • IGBT Insulated Gate Bipolar Transistor
  • three switching circuits including two switching elements 350 connected in series are connected in parallel. In each switching circuit, the voltage at the connection point of the two switching elements is supplied to the motor 21 as a drive signal 351.
  • the three drive signals 351 generated by the inverter 35 are supplied to the motor 21 through the connector 37 of the power supply device 3, the connection cable 4, and the connector 24 of the main body 2.
  • the connection cable 4 includes three signal lines 40a for transmitting the three drive signals 351 from the power supply device 3 to the main body 2.
  • the motor 21 is, for example, a three-phase motor, and includes a U-phase coil 21a, a V-phase coil 21b, and a W-phase coil 21c.
  • the three drive signals 351 are supplied to the U-phase coil 21a, the V-phase coil 21b, and the W-phase coil 21c, respectively.
  • the sensor board 22 included in the main body 2 includes, for example, three sensors 220. Each sensor 220 detects the rotational position of the motor 21. The three sensors 220 are arranged at intervals of 120 degrees along the rotation direction of the motor 21, for example.
  • the output signal (in other words, the position detection signal) 230 of each sensor 220 is supplied to the connector 24.
  • the three output signals 230 supplied to the connector 24 are supplied to the control circuit 34 through the connector 37 of the connection cable 4 and the power supply device 3.
  • the connection cable 4 includes three signal lines 40d that transmit the output signals 230 of the three sensors 220 from the main body 2 to the power supply device 3, respectively.
  • the output signal 230 of the sensor 220 may be referred to as a sensor signal 230.
  • the control circuit 34 includes, for example, a microprocessor 341 and a DC-DC converter 340.
  • the DC-DC converter 340 steps down the DC voltage supplied from the AC-DC converter 330 and outputs the DC voltage. It can be said that the DC-DC converter 340 is a step-down circuit.
  • the DC-DC converter 340 produces a power source for the microcomputer 341. Further, the DC-DC converter 340 generates a power source for the sensor 220 on the sensor board 22.
  • the power supply of the sensor 220 generated by the DC-DC converter 340 is supplied to each sensor 220 through the connector 37, the connection cable 4, and the connector 24.
  • connection cable 4 includes a signal line 40b that transmits the positive power supply for the sensor 220 from the power supply device 3 to the main body 2, and a signal line 40c that transmits the negative power supply for the sensor 220 from the power supply device 3 to the main body 2.
  • the connection cable 4 includes eight signal lines.
  • the microprocessor 341 controls the rotation of the motor 21 by controlling the inverter 35 based on the three sensor signals 230 from the sensor board 22. Specifically, the microcomputer 341 controls the voltage of the control terminal of each switching element 350 of the inverter 35 based on the three sensor signals 230 to control the on / off state of each switching element 350. As a result, an appropriate drive signal 351 is supplied from the inverter 35 to each of the U-phase coil 21a, the V-phase coil 21b, and the W-phase coil 21c of the motor 21, and the rotation of the motor 21 is controlled.
  • the microcomputer 341 generates six control signals 342, and supplies the generated six control signals 342 to the control terminals of the six switching elements 350, respectively.
  • the control circuit 34 may include a hardware circuit that does not require software to realize the function, instead of the microcomputer 341 that requires software to realize the function.
  • a power supply device 3 including an inverter 35, a control circuit 34, and a power supply unit 33 is provided in addition to the main body 2.
  • the power supply device 3 can be shared among the plurality of main bodies 2.
  • the power supply device 3 can be shared between the main bodies 2 of a plurality of disc grinders.
  • the power supply device 3 can be shared between the main bodies 2 of the plurality of types of power tools 1. For example, it can be shared between the main body 2 of a disc grinder, an impact driver, a drill driver, a circular saw, a reciprocating saw and a polisher.
  • the power supply device 3 can be connected to each of the disc grinder, the impact driver, the drill driver, the circular saw, the reciprocating saw, and the main body 2 of the polisher. Therefore, it is not necessary to separately provide the inverter 35, the control circuit 34, and the power supply unit 33 for each power tool 1, so that the cost of the power tool 1 can be reduced.
  • the inverter 35, the control circuit 34, and the power supply unit 33 are provided separately from the main body 2, the size of the main body 2 can be reduced. Alternatively, the weight of the main body 2 can be reduced. Therefore, the user can easily work by holding the main body 2.
  • FIG. 3 is a diagram schematically showing a configuration example of a power tool 100 including a main body 2 having an inverter 35, a control circuit 34, and a power supply unit 33.
  • the circuit board 31 is housed in the housing 20 of the main body 2. Further, the housing 20 is not provided with the connector 24, and the two signal lines 50a of the connection cable 5 are directly connected to the substrate 32. Comparing the power tool 100 of FIG. 3 and the power tool 1 of FIG. 1, the length of the housing 20 gripped by the user is shorter in the power tool 1 than in the power tool 100. Further, the main body 2 of the power tool 1 is lighter than the main body 2 of the power tool 100.
  • connection cable 5 When the connection cable 5 is detachable from the power supply device 3 as in this example, the connection cable 5 can be easily replaced. Further, the length of the connection cable 5 can be easily changed by preparing a plurality of types of connection cables 5 having different lengths. Further, since the power tool 1 can be stored in the case with the connection cable 5 removed from the power supply device 3, the user can easily carry the power tool 1.
  • connection cable 4 when the connection cable 4 is detachable from the main body 2 and the power supply device 3 as in this example, the connection cable 4 can be easily replaced. Further, the length of the connection cable 4 can be easily changed by preparing a plurality of types of connection cables 4 having different lengths. Further, since the power tool 1 can be stored in the case with the connection cable 4 removed from the main body 2 and the power supply device 3, the user can easily carry the power tool 1.
  • the power supply unit 33, the control circuit 34, and the inverter 35 are mounted on one board 32, but at least two of the power supply unit 33, the control circuit 34, and the inverter 35 are mounted on different boards. May be done.
  • FIG. 4 is a diagram showing a configuration example of a power tool 1 including a main body 2 having an inverter 35.
  • FIG. 5 is a diagram mainly showing an example of a circuit configuration of a power tool 1 including a main body 2 having an inverter 35. INV shown in FIG. 4 means an inverter.
  • the power tool 1 including the main body 2 having the inverter 35 may be particularly referred to as a power tool 1A.
  • the DC voltage generated by the AC-DC converter 330 is supplied to the connector 37. Further, the six control signals 342 generated by the control circuit 34 are supplied to the connector 37.
  • connection cable 4 included in the power tool 1A includes 13 signal lines. Specifically, the connection cable 4 includes the above-mentioned signal lines 40b and 40c, the above-mentioned three signal lines 40d, the above-mentioned signal lines 40e and 40f, and six signal lines 40g.
  • the signal line 40e transmits the positive potential of the DC voltage generated by the AC-DC converter 330 from the power supply device 3 to the main body 2.
  • the positive potential transmitted by the signal line 40e is supplied to the inverter 35 as a positive power source through the connector 24 of the main body 2.
  • the signal line 40f transmits the ground potential of the DC voltage generated by the AC-DC converter 330 from the power supply device 3 to the main body 2.
  • the ground potential transmitted by the signal line 40f is supplied to the inverter 35 as a negative power source through the connector 24.
  • the six signal lines 40g transmit the six control signals 342 generated by the control circuit 34 from the power supply device 3 to the main body 2, respectively.
  • the control signal transmitted by the signal line 40g is supplied to the control terminal of the switching element 350 of the inverter 35 through the connector 24.
  • the on / off state of the switching element 350 is controlled by a control signal.
  • the length of the housing 20 gripped by the user is shorter in the power tool 1A than in the power tool 100. Further, the main body 2 of the power tool 1A is lighter than the main body 2 of the power tool 100. Therefore, the user can easily work by holding the main body 2 of the power tool 1A in his hand.
  • the control circuit 34 may be provided in the main body 2 instead of the power supply device 3.
  • FIG. 6 is a diagram showing a configuration example of a power tool 1 including a main body 2 having a control circuit 34.
  • FIG. 7 is a diagram mainly showing an example of a circuit configuration of a power tool 1 including a main body 2 having a control circuit 34.
  • the power tool 1 including the main body 2 having the control circuit 34 may be referred to as a power tool 1B.
  • the connection cable 4 included in the power tool 1B includes 11 signal lines.
  • the connection cable 4 includes the above-mentioned three signal lines 40a, the above-mentioned signal lines 40e and 40f, and six signal lines 40h.
  • the DC voltage (in other words, the positive potential and the ground potential) transmitted by the signal lines 40e and 40f is supplied to the DC-DC converter 340 of the control circuit 34 through the connector 24.
  • Six control signals 342 output from the control circuit 34 are supplied to the connector 24.
  • the six signal lines 40h transmit the six control signals 342 supplied to the connector 24 from the main body 2 to the power supply device 3, respectively.
  • the length of the housing 20 gripped by the user is shorter in the power tool 1B than in the power tool 100. Further, the main body 2 of the power tool 1B is lighter than the main body 2 of the power tool 100. Therefore, the user can easily work by holding the main body 2 of the power tool 1B in his hand.
  • the number of signal lines of the connection cable 4 is the smallest for the power tool 1, the second smallest for the power tool 1B, and the largest for the power tool 1A. Therefore, after the connection cable 4 provided by the power tools 1, 1A and 1B, the connection cable 4 provided by the power tool 1 has the lowest possibility of disconnection.
  • connection cable 5 of the power supply device 300 with a cable is detachable from the power supply device 3, but may be fixed to the power supply device 3 so as not to be detachable.
  • the two signal lines 50a of the connection cable 5 may be directly connected to the board 32 without providing the connectors 38 and 51 on the power supply device 3 and the connection cable 5, respectively.
  • connection cable 4 may be fixed to the power supply device 3 so as not to be detachable.
  • each signal line of the connection cable 4 may be directly connected to the substrate 32 without providing the connectors 37 and 42 to the power supply device 3 and the connection cable 4, respectively.
  • connection cable 4 may be fixed to the main body 2 so as not to be detachable. In this case, each signal line of the connection cable 4 may be pulled into the housing 20 of the main body 2 without providing the connectors 24 and 41 on the main body 2 and the connection cable 4, respectively.
  • the power supply device 3 provided with the inverter 35 may be provided with a cooling fan for cooling the inverter 35.
  • the inverter 35 can be cooled by the cooling fan 23 of the main body 2.
  • the main body 2 includes the sensor board 22, but the sensor board 22 may not be provided.
  • the control circuit 34 may detect, for example, the current flowing through the motor 21 and determine the rotation position of the motor 21 based on the detection result. Further, the control circuit 34 may detect, for example, the induced voltage generated by the motor 21 and obtain the rotation position of the motor 21 based on the detection result.
  • the configuration of the connection cable 4 includes the signal lines 40b and 40c for transmitting the power supply for the sensor 220 from the power supply device 3 to the main body 2 and the output signal 230 of the sensor 220.
  • the configuration may not include the three signal lines 40d transmitted from 2 to the power supply device 3. As a result, the number of required signal lines is reduced, so that the cost of the power tool 1 can be reduced.
  • FIG. 8 is a diagram showing a configuration example of a power tool 1 in which the power supply device 3 can be attached to and detached from the main body 2. In FIG. 8, the description of a part of the configurations in the housings 20 and 30 is omitted.
  • the housing 30 of the power supply device 3 is removable from the housing 20 of the main body 2.
  • a connection terminal group 39 composed of a plurality of connection terminals is provided. Each connection terminal of the connection terminal group 39 is exposed from the housing 30.
  • a connection terminal group 27 composed of a plurality of connection terminals is provided. Each connection terminal of the connection terminal group 27 is exposed from the housing 20.
  • the control circuit 34 In the power tool 1 provided with the power supply unit 33, the control circuit 34, and the inverter 35 in the power supply device 3, when the housing 30 is mounted on the housing 20, the control circuit 34 is electrically connected to the sensor substrate 22 as in FIG. The inverter 35 is electrically connected to the motor 21. Further, in the power tool 1A, when the housing 30 is mounted on the housing 20, the control circuit 34 of the power supply device 3 is electrically connected to the inverter 35 and the sensor board 22 of the main body 2 as in FIG. The DC voltage output from the AC-DC converter 330 of the power supply device 3 is supplied to the inverter 35 of the main body 2.
  • the inverter 35 of the power supply device 3 is electrically connected to the motor 21 and the control circuit 34 of the main body 2 as in FIG. 7, and the power supply device
  • the DC voltage output from the AC-DC converter 330 of 3 is supplied to the control circuit 34 of the main body 2.
  • the power supply device 3 can be shared among the plurality of main bodies 2. The cost of the power tool 1 can be reduced.
  • the power supply unit 33 of the power supply device 3 includes an AC-DC converter 330, but a battery may be provided instead of the AC-DC converter 330.
  • FIG. 9 is a diagram showing a configuration example of the power tool 1 in which the power supply unit 33 includes the battery 335.
  • the description of all the configurations in the housing 20 is omitted, and the description of a part of the configurations in the housing 30 is omitted.
  • the connection cable 5 becomes unnecessary.
  • the battery 335 may be rechargeable by a charger separate from the power tool 1. In this case, a charging terminal for charging the battery 335 is provided in the housing 30 of the power supply device 3 so as to be exposed from the housing 30.
  • the charging voltage from the charger is supplied to the charging terminal, and the battery 335 is charged.
  • the DC voltage output from the battery 335 is supplied to the DC-DC converter 340 of the inverter 35 and the control circuit 34 instead of the DC voltage generated by the AC-DC converter 330.
  • the power supply device 3 can be shared among the plurality of main bodies 2, so that the cost of the power tool 1 can be reduced.
  • the main body 2 can be made smaller or lighter.
  • the main body 2 and the power supply device 3 are connected by the connection cable 4, but as shown in FIG. 10, the power supply of the power tool 1 in which the housing 30 is detachable from the housing 20.
  • the unit 33 may include a battery 335.
  • FIG. 10 the description of a part of the configurations in the housings 20 and 30 is omitted.
  • the main body 2 is provided with the connector 24 and the connection terminal group 27, the power supply device 3 is provided with the connector 37 and the connection terminal group 39, and the main body 2 and the power supply device 3 can be connected by the connection cable 4.
  • the housing 30 of the power supply device 3 may be attached to and detached from the housing 20 of the main body 2.
  • 11 and 12 are diagrams showing a configuration example of the power tool 1 in this case.
  • FIG. 11 shows a power tool 1 in which the main body 2 and the power supply device 3 are connected by a connection cable 4.
  • FIG. 12 shows a power tool 1 in which the housing 30 of the power supply device 3 is attached to the housing 20 of the main body 2. In FIGS. 11 and 12, the description of a part of the configuration in the housings 20 and 30 is omitted.
  • 11 and 12 show the power tool 1 not provided with the connection cable 5, but in the power tool 1 provided with the connection cable 5, the main body 2 is provided with the connector 24 and the connection terminal group 27, and the power supply device 3 is provided with the connector 24 and the connection terminal group 27.
  • the connector 37 and the connection terminal group 39 may be provided so that the main body 2 and the power supply device 3 can be connected by the connection cable 4, and the housing 30 can be attached to and detached from the housing 20.
  • FIG. 13 is a diagram mainly showing a configuration example of a power supply unit 33 including an AC-DC converter 330 and a booster circuit 336.
  • the booster circuit 336 boosts and outputs the DC voltage output from the AC-DC converter 330.
  • the booster circuit 336 boosts the DC voltage output from the AC-DC converter 330, for example, several times.
  • the DC voltage output from the booster circuit 336 is supplied to the DC-DC converter 340 of the inverter 35 and the control circuit 34.
  • FIG. 14 is a diagram mainly showing another configuration example of the power supply unit 33 including the AC-DC converter 330 and the booster circuit 336.
  • the booster circuit 336 boosts and outputs the AC voltage supplied to the connector 52. Then, the AC voltage output from the booster circuit 336 is converted into a DC voltage by the AC-DC converter 330.
  • the DC voltage generated by the AC-DC converter 330 is supplied to the DC-DC converter 340 of the inverter 35 and the control circuit 34.
  • the power supply unit 33 is provided with the booster circuit 336, so that a high voltage can be supplied to the inverter 35. As a result, a high voltage can be supplied to the motor 21. Therefore, the current flowing through the inverter 35 and the motor 21 can be reduced. As a result, heat generation of the inverter 35 and the motor 21 can be suppressed.
  • the power supply unit 33 may include a battery 335 and a booster circuit 336 as shown in FIG.
  • the booster circuit 336 boosts the output voltage of the battery 335 and outputs it.
  • the DC voltage output from the booster circuit 336 is supplied to the DC-DC converter 340 of the inverter 35 and the control circuit 34.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Inverter Devices (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Cette invention concerne un dispositif d'alimentation électrique (3). Le dispositif d'alimentation électrique (3) est destiné à être connecté à un corps d'outil électrique (2) qui comprend un moteur à courant continu sans balais (21). Le dispositif d'alimentation électrique (3) comprend : au moins l'un d'un onduleur (35) qui commande le moteur à courant continu sans balais (21) et d'un circuit de commande (34) qui commande l'onduleur (35) ; et une unité d'alimentation électrique (33) qui fournit de l'énergie à l'onduleur (35).
PCT/JP2020/034812 2019-09-17 2020-09-15 Dispositif d'alimentation électrique, dispositif d'alimentation électrique équipé d'un câble et outil électrique WO2021054302A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021546661A JP7300513B2 (ja) 2019-09-17 2020-09-15 ケーブル付き電源装置及び電動工具
JP2023100023A JP2023123605A (ja) 2019-09-17 2023-06-19 電源装置及び電動工具

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019168545 2019-09-17
JP2019-168545 2019-09-17

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WO2021054302A1 true WO2021054302A1 (fr) 2021-03-25

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PCT/JP2020/034812 WO2021054302A1 (fr) 2019-09-17 2020-09-15 Dispositif d'alimentation électrique, dispositif d'alimentation électrique équipé d'un câble et outil électrique

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JPH11297402A (ja) * 1998-04-14 1999-10-29 Nippon Electric Ind Co Ltd 電動工具用電源アダプタ
US20110248583A1 (en) * 2008-02-07 2011-10-13 Atlas Dynamic Devices, Llc Power Transmission Tool And System

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