WO2018018777A1 - 电动工具 - Google Patents

电动工具 Download PDF

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Publication number
WO2018018777A1
WO2018018777A1 PCT/CN2016/104808 CN2016104808W WO2018018777A1 WO 2018018777 A1 WO2018018777 A1 WO 2018018777A1 CN 2016104808 W CN2016104808 W CN 2016104808W WO 2018018777 A1 WO2018018777 A1 WO 2018018777A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
type
circuit
power source
access circuit
Prior art date
Application number
PCT/CN2016/104808
Other languages
English (en)
French (fr)
Inventor
徐谦
陈仕波
Original Assignee
南京德朔实业有限公公司
泉峰香港有限公司
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 南京德朔实业有限公公司, 泉峰香港有限公司 filed Critical 南京德朔实业有限公公司
Publication of WO2018018777A1 publication Critical patent/WO2018018777A1/zh
Priority to US16/252,346 priority Critical patent/US10903730B2/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K23/00DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/64Motors specially adapted for running on DC or AC by choice
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION 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
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30Structural association with control circuits or drive circuits
    • H02K11/33Drive circuits, e.g. power electronics
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K23/00DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K23/00DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/26DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the armature windings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K23/00DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/26DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the armature windings
    • H02K23/34DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the armature windings having mixed windings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28Layout of windings or of connections between windings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P4/00Arrangements specially adapted for regulating or controlling the speed or torque of electric motors that can be connected to two or more different electric power supplies
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/04Machines with one rotor and two stators

Definitions

  • the present invention relates to a power tool, and more particularly to a power tool powered by a power source using two different voltages.
  • a power tool comprising: a motor, comprising: a rotor configured to be rotatable about a central axis; a stator comprising a ring yoke portion and a plurality of teeth formed to protrude inside or outside the ring yoke portion; a first type of winding for winding a portion of the plurality of teeth; a plurality of second type windings for winding another portion of the plurality of teeth; a first power supply access circuit for accessing a a first power supply of the voltage; the first driving circuit comprises: a plurality of first type of electronic switches connected between the first type of windings and the first power supply access circuit; and a second power supply access circuit for accessing one a second power supply having a second voltage; the second driving circuit comprising: a plurality of second type of electronic switches connected between the second type of winding and the second power supply access circuit; wherein, the first type of winding and the second type The windings are circumferentially spaced along the
  • the method further includes: a control module, configured to generate a control signal for turning on or off the plurality of first-class electronic switches or/and the plurality of second-type electronic switches; the control module and the first driving circuit and the Two drive circuit Electrical connection.
  • a control module configured to generate a control signal for turning on or off the plurality of first-class electronic switches or/and the plurality of second-type electronic switches; the control module and the first driving circuit and the Two drive circuit Electrical connection.
  • the method further includes: a detecting circuit, configured to detect whether the first power access circuit is connected to the first power source; and a switch for turning on or off between the first power access circuit and the first driving circuit The electrical connection; after the second power supply access circuit is connected to the second power supply, the detection circuit controls the electrical connection between the first power supply access circuit and the first drive circuit.
  • the method further includes: an indicating module, configured to indicate whether the first power access circuit is connected to the first power source and/or the second power access circuit is connected to the second power source; and the indicating module is connected to the first power source The circuit and the second power access circuit are electrically connected.
  • the method further includes: an indication module, including: a first indication unit, configured to indicate whether the first power access circuit is connected to the first power source; and a second indication unit, configured to indicate whether the second power access circuit is connected The second indicating unit is electrically connected to the first power receiving circuit; the second indicating unit is electrically connected to the second power receiving circuit.
  • an indication module including: a first indication unit, configured to indicate whether the first power access circuit is connected to the first power source; and a second indication unit, configured to indicate whether the second power access circuit is connected The second indicating unit is electrically connected to the first power receiving circuit; the second indicating unit is electrically connected to the second power receiving circuit.
  • the method further includes: a signal switch for transmitting a switch signal for starting or activating the control module.
  • the sum of the number of windings of the first type and the number of windings of the second type is an even multiple of the number of phases of the motor.
  • the motor is a three-phase motor, and the sum of the number of windings of the first type and the number of windings of the second type is a multiple of 6
  • the output characteristic parameter of the first power access circuit connected to the first power supply ⁇ motor is substantially the same as the output characteristic parameter of the second power supply access circuit connected to the second power supply ⁇ motor; the output characteristic parameter of the motor includes the motor Speed, torque or output power.
  • winding diameter and/or the number of winding turns of the first type of winding and the second type of winding are different.
  • the first power source connected to the first power access circuit is a DC power source
  • the second power source connected to the second power source access circuit is an AC power source
  • some first type windings form an angular connection
  • some A star connection is formed between the second type of windings.
  • the withstand voltage value of the first type of electronic switch is lower than the withstand voltage of the second type of electronic switch.
  • Another electric power tool includes: a first power access circuit for accessing a first power source having a first voltage; and a second power source access circuit for accessing a second voltage a second power source, comprising: a rotor configured to be rotatable about a central axis; a stator including a ring yoke portion and a plurality of teeth formed to protrude toward an inner side or an outer side of the ring yoke portion; the first type of winding for The first power source generates the first a second type of winding, configured to generate a second magnetic field that overlaps with the first magnetic field under the action of the second power source; the first driving circuit includes: a plurality of first type of electronic switches connected to the first type of winding and the first a second power supply access circuit for accessing a second power supply having a second voltage; a second drive circuit comprising: a plurality of second type of electronic switches connected to the second type of winding and The second power source is connected between the circuits, wherein the
  • the method further includes: an insulating layer disposed between the first type of winding and the second type of winding.
  • the method further includes: a first control module, configured to generate a control signal for turning on or off the plurality of first type of electronic switches; and a second control module, configured to generate a plurality of second type of electronic signals The control signal is turned on or off; the first control module is in communication with the second control module.
  • the detecting circuit is configured to detect whether the first power access circuit is connected to the first power source; and to turn on or off the electrical connection between the first power access circuit and the first driving circuit After the second power supply access circuit is connected to the second power supply, the detection circuit controls the electrical connection between the first power supply access circuit and the first drive circuit.
  • the method further includes: an indication module, including: a first indication unit, configured to indicate whether the first power access circuit is connected to the first power source; and a second indication unit, configured to indicate whether the second power access circuit is connected The second indicating unit is electrically connected to the first power receiving circuit; the second indicating unit is electrically connected to the second power receiving circuit.
  • an indication module including: a first indication unit, configured to indicate whether the first power access circuit is connected to the first power source; and a second indication unit, configured to indicate whether the second power access circuit is connected The second indicating unit is electrically connected to the first power receiving circuit; the second indicating unit is electrically connected to the second power receiving circuit.
  • the method further includes: a signal switch for transmitting a switch signal for starting or activating the first control module or the second control module.
  • the motor is a three-phase motor.
  • the first power source connected to the first power access circuit is an AC power source
  • the second power source connected to the second power source access circuit is a DC power source
  • the first power source access circuit is connected to the first power source ⁇ motor
  • the ratio of the output characteristic parameter to the output characteristic parameter of the second power supply access circuit to the second power supply ⁇ motor ranges from 0.8 to 1.2; the output characteristic parameters of the motor include the motor speed, torque or output power.
  • first type of windings and the second type of windings have different winding diameters and/or winding turns.
  • the first power source connected to the first power access circuit is a DC power source
  • the second power source connected to the second power source access circuit is an AC power source
  • some first type windings form an angular connection
  • some A star connection is formed between the second type of windings.
  • the withstand voltage value of the first type of electronic switch is lower than the withstand voltage of the second type of electronic switch.
  • the power tool adopting the above solution can work under the unused voltage, improves the adaptability of the power tool to the power source, and is convenient for the user to use.
  • FIG. 1 is a schematic structural view of an embodiment of a power tool
  • FIG. 2 is a schematic structural view of an embodiment of a motor
  • FIG. 3 is a schematic structural view of a stator of the motor shown in FIG. 2;
  • FIG. 4 is a schematic structural view of another embodiment of a motor
  • Figure 5 is a connection diagram of windings of the motor shown in Figure 2;
  • FIG. 6 is a circuit connection diagram of the power tool shown in FIG. 1;
  • FIG. 7 is a circuit connection diagram of a first driving circuit
  • FIG. 8 is a schematic structural view of another embodiment of a motor
  • FIG. 9 is a schematic view of a winding terminal in the motor shown in FIG. 8;
  • FIG. 10 is a connection diagram of a drive circuit and a winding terminal in the motor
  • 11 is another circuit connection diagram of the power tool.
  • a power tool 100 is provided.
  • the power tool 100 includes: a base 101, a table 102, a saw blade 103, a first power supply access circuit 10, a second power supply access circuit 20, a motor 30, a first drive circuit 12, a second drive circuit 13, and a control module 40. .
  • the base 101 is used to support the table 102, and the power tool 100 can be smoothly placed on the ground or the operation plane.
  • the table 102 is rotatably coupled to the base 101 for placing the workpiece.
  • Saw blade 103 and table 10 2 is pivotally connected by a bracket 104 for cutting a workpiece.
  • the motor 30 is used to provide a source of power, and the motor 30 drives the saw blade 103 to cut the workpiece placed on the table 102.
  • the overall structure of the power tool 100 is substantially the same as that of a general miter saw structure, and will not be described in detail herein.
  • the motor 30 includes a rotor 3 3 that can drive the saw blade 103 and a stator 31 for generating a magnetic field that drives the rotor 33.
  • the stator 31 When the motor 30 is energized, the stator 31 generates a magnetic field to drive the rotor 33 to rotate, thereby driving the saw blade 103 connected to the rotor to cut the workpiece.
  • the motor 30 is a brushless DC inner rotor motor. of course.
  • the motor 30 can also be an outer rotor motor.
  • the rotor 33 is disposed to rotate about a central axis.
  • the rotor 33 is provided with permanent magnets 331 for generating a magnetic field, and the permanent magnet slots 331 are arranged circumferentially spaced along the central axis for placing permanent magnets 332 capable of generating or inducing a magnetic field.
  • the rotor 33 is sleeved in the stator 31 and forms a radial gap with the stator 31.
  • the stator 31 includes a ring yoke portion 341 and a plurality of tooth portions 342 which are formed to protrude toward the inner side of the ring yoke portion 341. (If the motor is an outer rotor motor, the stator includes a plurality of teeth portions which are formed to protrude outward from the ring yoke portion 341. ), several first type windings and several second type windings. A plurality of first type windings are wound around a portion of the plurality of teeth 342, and a plurality of second type windings are wound around the other of the plurality of teeth. Wherein the first type of windings and the second type of windings are circumferentially spaced along the central axis.
  • the circumferential spacing of the first type of windings and the second type of windings as described herein along the central axis means that in the circumferential direction along the central axis, as long as there is at least one first type of winding located in the second type Between the windings it is considered that there is a circumferential spacing of the first type of winding and the second type of winding along the central axis.
  • the stator includes six teeth 342, 343, 344, 345, 346, 347 which are formed to protrude toward the inner side of the ring yoke portion 341.
  • Three first type windings 311, 312, 313 are wound around the partial teeth 342, 344, 346, respectively.
  • the three second type windings 321, 322, 323 are wound around the other partial teeth 343, 345, 347, respectively.
  • the first type of windings 311, 312, 313 and the second type of windings 321, 322, 323 are spaced apart from each other in the circumferential direction along the central axis.
  • the first type of windings 311, 312, 313 are wound on the teeth 3 42 , 344 , 346 by first windings of the same diameter.
  • Each of the first type windings 311, 312, 313 has an access terminal 31 la, 3 12a, 313a and an output terminal 311b, 312b, 313b.
  • the access terminals 311a, 312a, and 313a are respectively configured to access the first voltage accessed by the first power access circuit.
  • the terminals 311b, 312b. 313b are connected to the access terminals or terminals of the other first type of windings to form a star or triangle between the three first type windings. Connected.
  • the second type of windings 321, 322, 323 are wound around the teeth 3 43 , 345 , 347 by a second winding different in diameter from the first winding.
  • each of the second type windings 321, 322, 323 has an access terminal 321a, 322a 323a and an output terminal 321b, 322b, 323.
  • the access terminals 321a, 322a. 323a are respectively configured to access the second voltage accessed by the second power access circuit.
  • the terminals 311b, 312b. 313b are connected to the terminals or terminals of the other type 2 windings to form a star or delta connection between the three second type windings.
  • the access terminals 311a, 312a. 313a of the first type of winding and the access terminals 321a, 322a. 323a of the second type of winding can be connected to voltages of different voltage values, so that the motor 30 can be accessed. Different voltages.
  • the first type of winding and the second winding can be selected according to the application requirements of the motor 30 in terms of diameter, number of turns, and windings having different resistivities.
  • each tooth portion of the motor 30 is wound by one winding.
  • Motor 30 is a six-slot three-phase motor.
  • the structural diagram of another motor 30' shown in FIG. 4 also includes three first-type windings 311', 312', 313 wound around a portion of the plurality of teeth. 'and three second-type windings 321 , 322 , 323 wound around another portion of the tooth.
  • Each of the first type windings 311', 312, 313' has an access end 311'a, 312, a, 313'a and an outgoing end 311'b, 312'b, 313'b .
  • Each of the second type of windings 32A, 322', 323' has an access end 321'a, 322'a, 323'a and an output end 321'b, 322'b, 323'b.
  • the access terminals 32 l'a, 322'a, 323'a are connected to the first voltage, and the access terminals 321'a, 322'a, 323'a are connected to the second voltage different from the first voltage, so that the motor 30' can access different voltages.
  • one winding of the motor 30' is wound around a plurality of teeth. Specifically, as shown in Fig. 3, one winding is wound around three adjacent teeth. Of course, one winding can also be wound around two or more teeth.
  • the first type of winding in the motor can be wound on the two teeth, the second type winding is wound on the three teeth, and the first type of winding and the second type of winding along the second type
  • the central axes are circumferentially spaced apart and the first type of winding is located between the two second type of windings.
  • the first type of windings 311, 312, 313 and the second type of windings 321, 322, 323 may be formed in different wiring manners to form two sets of three-phase terminals to access different voltages.
  • the terminals 311b, 312b. 313b of 312, 313 are connected to each other to a neutral point O to form a star connection
  • the terminals 321b, 322 b. 323b of the second type of windings 321, 322, 323 are connected to each other.
  • a neutral point constitutes a star connection.
  • the terminals of the first type of windings 311, 312, 313 are connected end to end to form an angular connection
  • the terminals of the second type of windings 321, 322, 323 are connected end to end to form an angular connection.
  • one of the first type of windings 311, 312, 313 and the second type of windings 321, 322, 323 is angularly connected and the other is connected (as shown in Figure 5).
  • the motor adopting the above scheme that is, the first type winding and the second type winding are circumferentially spaced along the central axis, and the number of the first type of windings of the motor and the number of the second type of windings are even numbers of the number of phases of the motor. Times. Specifically, for a three-phase motor, the sum of the number of windings of the first type and the number of windings of the second type is a multiple of six.
  • the first power supply access circuit 10 is configured to access a first power source having a first voltage.
  • the second power supply access circuit 20 is for accessing a second power supply having a second voltage.
  • the first voltage of the first power source is different from the second voltage of the second power source. That is to say, the first power source and the second power source may be two DC power sources with different voltages, or two AC power sources with different voltages, or AC power sources and DC power sources with different voltages.
  • the first power source access circuit 10 includes a battery pack interface 105, and the battery pack interface 105 is disposed on the bracket 104 for accessing the DC power provided by the battery pack 107.
  • the second power access circuit 20 includes an AC plug 106 that can be connected to the AC mains. Possibly, the DC voltage is less than the AC voltage.
  • the first power access circuit 10 is connected to the direct current, the first type of windings form an angular connection, the second power supply access circuit 20 is connected to the alternating current, and the second type of windings
  • the star connection is formed.
  • the connection method avoids the mutual interference that the power tool may introduce due to accessing different power sources, and the winding method is simple.
  • the first filter circuit 15 is electrically connected to the first power supply access circuit 10 for filtering out clutter in the first power supply signal accessed by the first power supply access circuit 10.
  • the first filter circuit 15 includes a filter capacitor Cl.
  • a rectification module 40 is connected in series between the second power supply access circuit 20 and the motor 30 for converting the alternating current into The DC output is used to power the motor 30.
  • the rectifier module 40 includes a rectifier bridge and an EMI circuit.
  • the second filter circuit 25 is electrically connected to the second power supply access circuit 20, and more specifically, the second filter circuit 25
  • the rectifier module 21 is electrically connected to filter out the clutter in the direct current output from the rectifier module 21 to provide a smooth DC signal to the motor 30.
  • the second filter circuit 25 includes a filter capacitor C2.
  • the first power module 14 is electrically coupled to the first power access circuit 10 for powering other circuits or modules in the power tool. Specifically, the voltage of the first power source connected to the first power module 14 is converted by the first power module 14 to supply power to the first driving circuit 12, the first driving chip 13, and the control module 40.
  • the second power module 24 is electrically connected to the second power supply circuit 20, and the voltage of the second power source connected to the second power module 24 is converted by the second power module 24 to the second driver circuit 22 and the second driver.
  • the chip 23 is powered.
  • the first power module 14 and the second power module 24 may also constitute an integral power module as the first driving circuit 12 , the second driving circuit 22, the first driving chip 13, The second driver chip 14 and the control module 40 are powered.
  • the first driving circuit 12 includes a plurality of first type of electronic switches connected between the first type of windings 311, 312, 313 and the first power supply access circuit 10.
  • the first driving circuit 12 includes six first-class electronic switches Q1, Q2, Q3, Q4, Q5, Q6, and the six first-class electronic switches have respective enabling terminals UH, UL. , VH, VL, WH, WL serve as inputs to the first drive circuit 12 to receive control signals from the control module 40.
  • the first drive circuit 12 has three output terminals 12a, 12b, 12c.
  • the output terminal 12a is connected to the access terminal 311a of the first type of winding 311, the output terminal 12b is connected to the access terminal 312a of the first type of winding 312, and the output terminal 12c is connected to the access terminal 313a of the first type of winding 313.
  • the first power source that causes the first power supply access circuit 10 to be connected is coupled to the first type of windings 311, 312, 313 via the output terminals 12a, 12b, 12c of the first drive circuit 12 to provide electrical energy for operating the motor 30.
  • the first type of electronic switch is a semiconductor power tube.
  • the first driving chip 13 is connected in series between the first driving circuit 12 and the control module 40.
  • the first driving chip 13 is for converting the control signal output from the control module 40 into a voltage signal recognizable by the first driving circuit 12 to the first driving circuit 12.
  • the first driving chip 13 and the first driving circuit 12 may also be formed into an integrated circuit.
  • the second driving chip 23 is connected in series between the control module 40 and the second driving circuit 22.
  • the second driving chip 23 is configured to convert the control signal output by the control module 40 into a voltage signal that can be recognized by the second driving circuit 22 to be output to the second driving circuit 22.
  • the second driving chip 23 and the second driving circuit 23 can also be grouped Become the whole circuit.
  • the first driving chip 13 and the second driving chip 23 may also form an integral driving chip connected to the control module 40.
  • the second driving circuit 22 includes a plurality of second type of electronic switches connected between the second type of windings 321, 322, 323 and the second power supply access circuit 20. Similarly, the second driving circuit 22 includes six second-type electronic switches, each of which has its own enabling terminals UH', UL', VH', VL', WH', W L 'As the input of the second drive circuit 22 to receive the control signal of the control module 40.
  • the second drive circuit 22 has three output terminals 22a, 22b, 22c.
  • the output terminal 22a is connected to the access terminal 321a of the second type winding 321
  • the output terminal 22b is connected to the access terminal 322a of the second type winding 322
  • the output terminal 22c is connected to the access terminal 323a of the second type winding 323.
  • the second power source that causes the second power supply access circuit 20 to be connected is coupled to the second type of windings 321, 322, 323 via the output terminals 22a, 22b, 22c of the second drive circuit 22 to provide electrical energy for operating the motor 30.
  • the second type of electronic switch is a semiconductor power tube.
  • the first type of electronic switch and the second type of electronic switch can be electronically related to different withstand voltage values.
  • the first power access circuit 12 is connected to the direct current
  • the second power access circuit 22 is connected to the alternating current.
  • the withstand voltage of the first type of electronic switch is lower than the withstand voltage of the second type of electronic switch.
  • Two types of electronic switches avoid the influence of different power sources connected to the first power supply access circuit and the second power supply access circuit.
  • the use of electronic voltage with different withstand voltage values reduces the production cost while increasing the safety of the power tool.
  • the voltage of the DC voltage ranges from 14V to 60V. Further, the voltage of the DC voltage ranges from 18V to 56V, and the voltage of the AC voltage ranges from 110V to 130V or 210V to 230V.
  • the position detecting module 50 is electrically connected to the motor 30 for detecting the position of the rotor of the motor 30.
  • the output of position detection module 50 is coupled to control module 40.
  • the position detecting module 50 includes a Hall sensor disposed on the rotor core to detect a position at which the rotor rotates.
  • a plurality of position detecting modules 50 may be provided to detect the position of the rotor.
  • the control module 40 is operative to generate a control signal that turns the first type of electronic switch or the second type of electronic switch on or off. Specifically, the control module 40 outputs a first control signal for controlling whether each power switch in the first driving circuit 12 is turned on or off according to the position of the rotor detected by the position detecting module 50, thereby connecting the first power supply circuit 10
  • the first voltage applied to the first drive circuit 12 is supplied to the access terminals 311a, 312a, 313a of the first type of winding as a three-phase voltage.
  • the first power source connected to the first power access circuit 12 is a DC power source, and the second power source access circuit 22 is connected.
  • the second power source is an AC power port, and the controller 40 only generates a second control signal for turning on or off the second type of electronic switch without generating a first control for driving the first type of electronic switch to turn on or off. signal. That is to say, the power tool 100 is connected to the direct current and the alternating current power source at the same time, and only the alternating current power source supplies power to the motor.
  • the detecting circuit 60 is configured to detect whether the first power access circuit 10 is connected to the first power source or the second power source access circuit 20 is connected to the second power source.
  • a switch 16 is connected in series between the first power supply access circuit 10 and the first drive circuit 12 for turning on or off the electrical connection between the first power supply access circuit 10 and the first drive circuit 12. Specifically, when the detecting circuit 60 detects that the second power source accessing circuit 20 is connected to the second power source detecting circuit 60, the control signal for disconnecting the electrical connection between the first power source accessing circuit 10 and the first driving circuit 12 is output to the Off 16, the second power source connected to the second power supply access circuit 20 supplies power to the motor. The opposite is also true.
  • the first power access circuit 10 is connected to the direct current provided by the battery pack, and the second power access circuit 20 includes an alternating current plug for accessing the alternating current.
  • the power tool 100 has the direct current and the alternating current access port, and the power tool 100 is powered only by the second power module 20 connected to the alternating current, thereby saving power.
  • the control module 40 After the AC plug is connected to the AC plug, the control module 40 first generates a control signal for disconnecting all the first type of electronic switches, and then generates a control signal for turning on or off the first type of electronic switch to
  • the first power supply access circuit 10 is connected to the first power source, for example, the DC power of the battery pack supplies power to the motor 30. This ensures user safety.
  • the signal switch 43 is electrically connected to the first power source access circuit 10, the second power source access circuit 20, and the control module 40, respectively.
  • the signal switch 43 is used to send a control signal to activate or activate the control module 40.
  • the indication module 70 is configured to indicate whether the first power access circuit 10 is connected to the first power source and/or the second power source access circuit 20 is connected to the power source.
  • the indicator module 70 is coupled to the detection circuit.
  • the indication module 70 includes a first indication unit 71 and a second indication unit 72.
  • the first indicating unit 71 has two states indicating that the first power access circuit 10 is connected to the first power source and the first power source accessing circuit 10 is not connected to the first power source.
  • the second indicating unit 72 has two states indicating that the second power access circuit 20 is connected to the second power source and the second power source accessing circuit 20 is not connected to the second power source.
  • the first indicating unit 71 and the second indicating unit 72 each include an indicator light, and the indicator light is on when there is power access, and the indicator light is off when there is no power access.
  • the indicator light of the first indicating unit 71 is bright.
  • the indicator light of the second indicating unit 72 is turned on when detecting that the second power source accessing circuit 20 is connected to the second power source.
  • the detecting circuit 60 detects whether the first power source access circuit 10 is connected to the direct current and/or the second power source access circuit 2
  • the control module 40 If the detecting circuit 60 detects that the first power access circuit 10 is connected to the direct current and the second power receiving circuit 20 is connected to the alternating current, the control module 40 outputs a control for turning on or off the second type of electronic switch. The signal is driven by the second drive circuit 22 to drive the motor 30, whereby the alternating current accessed by the second power supply access circuit 20 provides electrical energy to the motor.
  • the control module 40 If the detecting circuit 60 detects that the first power access circuit 10 is connected to the direct current and the second power receiving circuit 20 is not connected to the alternating current, the control module 40 outputs the first type of electronic switch to be turned on or off. The control signal is operative to drive the motor 30 through the first drive circuit 12, whereby the direct current input by the first power supply access circuit 10 provides electrical energy to the motor.
  • the control module 40 If the detecting circuit 60 detects that the first power accessing circuit 10 is not connected to the direct current and the second power receiving circuit 20 is connected to the alternating current, the control module 40 outputs the second type of electronic switch to be turned on or off. The control signal is operative to drive the motor 30 through the second drive circuit 22, whereby the alternating current accessed by the second power supply access circuit 20 provides electrical energy to the motor.
  • the control module 40 detects the detection circuit 60.
  • the control signal to turn on or off the second type of electronic switch to the AC power supply to operate the motor 30 through the second drive circuit 22. That is, as long as the alternating current and direct current are simultaneously connected, the control module 40 outputs a control signal for turning the second type of electronic switch on or off to drive the motor 30 through the second drive circuit 22 to save power.
  • the control module 40 first outputs a control signal that causes all of the first type of electronic switches and all of the second electronic switches to be turned off, and outputs a control signal for turning on or off the first type of electronic signals to pass the first driving.
  • Circuit 12 drive motor Work, ensure the safety of electricity.
  • control module 40 can also be provided as two first control modules respectively electrically connected to the first drive circuit 12 and a second control module electrically connected to the second drive circuit 22.
  • the first signal is electrically coupled to the first control module
  • the second signal is electrically coupled to the second control module.
  • the power tool 100 adopting the foregoing solution can adapt two different voltage power sources to provide power required for operation, and the first power access circuit is connected to the first power source and the second power source access circuit.
  • the output characteristic parameters of the two power supply motor 30 are basically the same, so that the power tool is switched between two power sources of different voltages, the power of the power tool felt by the user is basically the same, and the power supply switching of two different voltages is avoided to make the motor output There are differences in characteristic parameters that affect the user experience.
  • the substantially identical output characteristic parameters of the motor 30 mean that the rotational speed, torque or output power of the motor is substantially the same.
  • the second power supply of the power tool is connected to the second power supply, and the rotation speed of the motor is 0.8 to 1.2 times the rotation speed of the first power supply circuit to the first power supply.
  • the second power supply of the power tool is connected to the second power supply, and the rotation speed of the motor is 0.8 to 0.9 times or 1.1 to 1.2 times the rotation speed of the first power supply circuit to the first power supply.
  • the second power source of the power tool is connected to the second power source.
  • the output power of the motor is 0.8 to 1.2 times the output power of the first power source circuit to the first power source. More specifically, the second power supply of the power tool is connected to the second power supply, and the output power of the motor is 0.8 to 0.9 times or 1.1 to 1.2 of the output power of the first power supply circuit to the first power supply. Times.
  • the torque of the second power supply accessing circuit of the power tool to the second power supply is 0.8 to 1.2 times the torque of the first power supply accessing circuit to the first power supply. More specifically, the torque of the second power supply of the power tool to the second power supply is 0.8 to 0.9 times or 1.1 to 1.2 times the torque of the first power supply circuit to the first power supply.
  • the motor 30" includes a rotor 33" that is disposed to rotate about a central axis and a stator 31" for generating a magnetic field that drives the rotor 33.
  • the rotor 33" is provided with permanent magnets 331" for generating a magnetic field, and the permanent magnet slots 331" are arranged at circumferential intervals along the central axis for placing permanent magnets 332" capable of generating or inducing a magnetic field.
  • the rotor 33" is sleeved within the stator 31" and forms a radial gap with the stator 31".
  • the stator 31" includes a ring yoke portion 341", a plurality of teeth 342 formed to protrude toward the inner side or the outer side of the ring yoke portion 341" , a number of first type windings and several second type windings.
  • the first type of winding is for generating a first magnetic field under the action of the first power source
  • the second type of winding is for generating a second magnetic field that overlaps the first magnetic field under the action of the second power source.
  • the first type of winding and the second type of winding are arranged radially along the central axis.
  • the first type winding 311" and the second type winding 321" are taken as an example, and the first type winding 311" is sequentially disposed on the same tooth portion along the radial direction of the central axis.
  • An insulation layer is disposed between the second type of winding 321", the first type of winding 311" and the second type of winding 321" to isolate mutual interference of the two magnetic fields.
  • the same tooth portion here includes the same plurality of tooth portions and the same single tooth portion.
  • a plurality of first type windings are connected to each other in series or in parallel to form three voltage access terminals for accessing the first power source.
  • a plurality of second type windings are connected to each other in series or in parallel to form another three voltage access terminals for accessing the second power source.
  • Each of the first type of windings has access terminals 31 l"a, 312"a, 313, a, 314"a, 315, a, 316"a and terminals 311, b, 312" b, 313"b, 314"b, 315,, b, 316,, b.
  • Two first type windings 311" symmetrically disposed with respect to the central axis are connected in parallel or in series with the first type of winding 314" to have a first a branch of the access terminal 311"c and the second access terminal 311"d.
  • the first type of winding 312" is connected in parallel or in series with the first type of winding 315" to have a first access end 312"c and a branch of the second access terminal 312"d;
  • the first type of winding 313" is connected in parallel or in series with the first type of winding 316" to form a branch having a first access terminal 313"c and a second access terminal 313"d
  • the first access terminals 312"c, 312, c, 313"c and the second access terminals 312"d, 312, d, 313"d are connected end to end such that the first type of windings form an angular connection.
  • the second access terminals 312"d, 312"d, 313"d are connected to the same neutral point and the first type of windings form a star connection.
  • the first access terminals 312"c, 312"c, 313"c are connected to the output terminals 12"a, 12"b, 12"c of the first drive circuit 12" as the three terminals of the first type of winding, respectively. To access the first power source.
  • Each of the second type of windings has an access end 322"a, 322"a, 323"a, 324"a, 325"a, 326"a, and an outgoing end 322"b, 322, b, 323 "b, 324,, b, 325,, b, 326,, b.
  • the two second type windings 322" symmetrically disposed with respect to the central axis are connected in parallel or in series with the second type of windings 324" to form a branch having a second access end 322"c and a second access end 322"d.
  • the second type of winding 322" is in parallel with the second type of winding 325" or
  • the series connection constitutes a branch having a second access terminal 322"c and a second access terminal 322"d;
  • the second type of winding 323" is connected in parallel or in series with the second type of winding 326" to have a second access terminal 323 "c" and the branch of the second access terminal 323"d.
  • the second access terminals 322"c, 322"c, 323”c and the second access terminals 322"d, 322"d, 323”d are connected end to end such that the second type of windings form an angular connection.
  • the second access terminals 322"d, 322"d, 323"d are connected to the same neutral point, and the first type of windings form a star connection.
  • the access terminals 322"c, 322"c, 323"c serve as the second The three terminals of the class winding are respectively connected to the output terminals 22"a, 22"b, 22"c of the second drive circuit 22" to access the second power source.
  • a first control module 41 for controlling the first drive circuit 12" and a second control for controlling the second drive circuit 22" are separately provided in the power tool 100.
  • Module 42" A communication connection between the first control module 41" and the second control module 42.
  • the second control module 42" outputs a control signal that causes the second type of electronic switch to be turned “on” or "off", and the first control module 41” does not output a control signal that causes the first type of electronic switch to be turned “on” or "off”.
  • a signal switch 43" may also be provided for activating or deactivating one of the first control module 41" and the second control module 42.
  • the input terminals of the signal switch 43" are respectively connected to the first power access circuit 10" and second power supply access circuit 20". After the first power supply access circuit 10" is connected to the first power supply port, the signal switch 43" activates the first control module 41", that is, the electrical connection between the first power supply module 14" and the first control module 41" is turned off. ⁇ Electrical connection of the second power module 24" to the second control module 42.
  • the signal switch 43" activates the second control module 42" and turns off the first The control module 41", that is, electrically connecting the second power module 24" with the second control module 42", disconnects the electrical connection of the first power module 14" with the first control module 42".
  • a power tool such as a power saw, a jig saw, a reciprocating saw, an angle grinder, a cutter, a lawn mower, or the like that can be connected to alternating current and direct current can adopt the above scheme.

Abstract

一种电动工具(100),包括:电机(30),该电机(30)具有:转子(33),被设置为绕一中心轴线转动;定子(31),包括环轭部(341)和多个向环轭部(341)内侧或外侧凸出形成的齿部(342、343、344、345、346、347);若干第一类绕组(311、311'、312、312'、313、313'),用于缠绕在若干齿部(342、343、344、345、346、347)中的一部分;若干第二类绕组(321、321'、322、322'、323、323'),用于缠绕在若干齿部(342、343、344、345、346、347)中的另一部分;第一电源接入电路(10),用于接入一个具有第一电压的第一电源;第一驱动电路(12),包括:若干第一类电子开关(Q1、Q2、Q3、Q4、Q5、Q6),连接在第一类绕组(311、311'、312、312'、313、313')与第一电源接入电路(10)之间;第二电源接入电路(20),用于接入一个具有第二电压的第二电源;第二驱动电路(22),包括:若干第二类电子开关,连接在第二类绕组(321、321'、322、322'、323、323')与第二电源接入电路(20)之间;其中,第一类绕组(311、311'、312、312'、313、313')和第二类绕组(321、321'、322、322'、323、323')沿中心轴线的周向或径向间隔设置。该电动工具(100)可适配两种不同的电压输入。

Description

电动工具
技术领域
[0001] 本发明涉及电动工具, 具体涉及一种使用两种不同电压的电源供电的电动工具 背景技术
[0002] 现有的电动工具包括两类, 一类采用交流电源供电, 另一类采用直流电源供电 。 采用交流电源供电的工具通常只能在距离电源插座较近的地方使用, 在远离 电源插座的工作范围内使用电动工具带来不便。 这就需要配置直流电源供电, 以便交流电动工具能够在远离电源插座的地方工作。
技术问题
[0003] 然而, 由于直流电源的电能储备有限, 在直流电源电能用尽, 如果能够选择连 接交流电源使电动工具继续完成工作, 将会给用户带来极大便利。
[0004] 因此, 需要一种既能接入交流电源又能接入直流电源的电动工具。
问题的解决方案
技术解决方案
[0005] 本发明采用如下的技术方案:
[0006] 一种电动工具, 包括: 电机, 包括: 转子, 被设置为能绕一中心轴线转动; 定 子, 包括环轭部和多个向环轭部内侧或外侧凸出形成的齿部; 若干第一类绕组 , 用于缠绕在多个齿部中的一部分; 若干第二类绕组, 用于缠绕在多个齿部中 的另一部分; 第一电源接入电路, 用于接入一个具有第一电压的第一电源; 第 一驱动电路, 包括: 若干第一类电子幵关, 连接在第一类绕组与第一电源接入 电路之间; 第二电源接入电路, 用于接入一个具有第二电压的第二电源; 第二 驱动电路, 包括: 若干第二类电子幵关, 连接在第二类绕组与第二电源接入电 路之间; 其中, 第一类绕组和第二类绕组沿中心轴线的周向间隔设置。
[0007] 进一步, 还包括: 控制模块, 用于产生使若干第一类电子幵关或 /和若干第二 类电子幵关导通或关断的控制信号; 控制模块与第一驱动电路和第二驱动电路 电性连接。
[0008] 进一步, 还包括: 检测电路, 用于检测第一电源接入电路是否接入第一电源; 幵关, 用于导通或断幵第一电源接入电路与第一驱动电路之间的电连接; 在第 二电源接入电路接入第二电源吋, 检测电路控制幵关断幵第一电源接入电路与 第一驱动电路之间的电连接。
[0009] 进一步, 还包括: 指示模块, 用于指示第一电源接入电路是否接入第一电源和 /或第二电源接入电路是否接入第二电源; 指示模块与第一电源接入电路和第二 电源接入电路电性连接。
[0010] 进一步, 还包括: 指示模块, 包括: 第一指示单元, 用于指示第一电源接入电 路是否接入第一电源; 第二指示单元, 用于指示第二电源接入电路是否接入第 二电源; 第一指示单元与第一电源接入电路电性连接; 第二指示单元与第二电 源接入电路电性连接。
[0011] 进一步, 还包括: 信号幵关, 用于发送启动或激活控制模块的幵关信号。
[0012] 进一步, 第一类绕组个数与第二类绕组个数之和为电机的相数的偶数倍。
[0013] 进一步, 电机为三相电机, 第一类绕组个数与第二类绕组个数之和为 6的倍数
[0014] 进一步, 第一电源接入电路接入第一电源吋电机的输出特性参数与第二电源接 入电路接入第二电源吋电机的输出特性参数基本相同; 电机的输出特性参数包 括电机的转速、 扭矩或输出功率。
[0015] 进一步, 第一类绕组与第二类绕组的绕线直径和 /或绕线匝数不同。
[0016] 进一步, 第一电源接入电路接入的第一电源为直流电源, 第二电源接入电路接 入的第二电源为交流电源, 若干第一类绕组之间构成角型连接, 若干第二类绕 组之间构成星型连接。
[0017] 进一步, 第一类电子幵关的耐压值低于第二类电子幵关的耐压值。
[0018] 另一种电动工具, 包括: 第一电源接入电路, 用于接入一个具有第一电压的第 一电源; 第二电源接入电路, 用于接入一个具有第二电压的第二电源; 电机, 包括: 转子, 被设置为能绕一中心轴线转动; 定子, 包括环轭部和多个向环轭 部内侧或外侧凸出形成的齿部; 第一类绕组, 用于在第一电源作用下产生第一 磁场; 第二类绕组, 用于在第二电源作用下产生与第一磁场重叠的第二磁场; 第一驱动电路, 包括: 若干第一类电子幵关, 连接在第一类绕组与第一电源接 入电路之间; 第二电源接入电路, 用于接入一个具有第二电压的第二电源; 第 二驱动电路, 包括: 若干第二类电子幵关, 连接在第二类绕组与第二电源接入 电路之间, 其中, 第一类绕组和第二类绕组沿中心轴线的径向设置。
[0019] 进一步, 还包括: 绝缘层, 设置在第一类绕组和第二类绕组之间。
[0020] 进一步, 还包括: 第一控制模块, 用于产生使若干第一类电子幵关导通或关断 的控制信号; 第二控制模块, 用于产生使若干第二类电子幵关导通或关断的控 制信号; 第一控制模块与第二控制模块通讯连接。
[0021] 进一步, 检测电路, 用于检测第一电源接入电路是否接入第一电源; 幵关, 用 于导通或断幵第一电源接入电路与第一驱动电路之间的电连接; 在第二电源接 入电路接入第二电源吋, 检测电路控制幵关断幵第一电源接入电路与第一驱动 电路之间的电连接。
[0022] 进一步, 还包括: 指示模块, 包括: 第一指示单元, 用于指示第一电源接入电 路是否接入第一电源; 第二指示单元, 用于指示第二电源接入电路是否接入第 二电源; 第一指示单元与第一电源接入电路电性连接; 第二指示单元与第二电 源接入电路电性连接。
[0023] 进一步, 还包括: 信号幵关, 用于发送启动或激活第一控制模块或第二控制模 块的幵关信号。
[0024] 进一步, 电机为三相电机。
[0025] 进一步, 第一电源接入电路接入的第一电源为交流电源, 第二电源接入电路接 入的第二电源为直流电源; 第一电源接入电路接入第一电源吋电机的输出特性 参数与第二电源接入电路接入第二电源吋电机的输出特性参数的比值的取值范 围为 0.8~1.2; 电机的输出特性参数包括电机的转速、 扭矩或输出功率。
[0026] 进一步, 第一类绕组与第二类绕组的绕线直径和 /或绕线匝数不同。
[0027] 进一步, 第一电源接入电路接入的第一电源为直流电源, 第二电源接入电路接 入的第二电源为交流电源, 若干第一类绕组之间构成角型连接, 若干第二类绕 组之间构成星型连接。 [0028] 进一步, 第一类电子幵关的耐压值低于第二类电子幵关的耐压值。 发明的有益效果
有益效果
[0029] 采用上述方案的电动工具能在不用的电压下工作, 提高了电动工具对电源的适 配性, 方便用户使用。
对附图的简要说明
附图说明
[0030] 图 1是电动工具的一个实施例的结构示意图;
[0031] 图 2是电机的一个实施例的结构示意图;
[0032] 图 3是图 2所示电机的定子的结构示意图;
[0033] 图 4是电机的另一个实施例的结构示意图;
[0034] 图 5是图 2所示电机的绕组的连接图;
[0035] 图 6是图 1所示电动工具中的一个电路连接图;
[0036] 图 7是第一驱动电路的电路连接图;
[0037] 图 8是电机的另一个实施例的结构示意图;
[0038] 图 9是图 8所示电机中的绕组接线端示意图;
[0039] 图 10是驱动电路与电机中的绕组接线端连接图;
[0040] 图 11是电动工具的另一个电路连接图。
本发明的实施方式
[0041] 以下结合附图和具体实施例对本发明作具体的介绍。
[0042] 参考图 1至图 6所示提供的一种电动工具 100, 为方便说明, 这里以斜锯为例进 行介绍。 电动工具 100包括: 底座 101、 工作台 102、 锯片 103、 第一电源接入电 路 10、 第二电源接入电路 20、 电机 30、 第一驱动电路 12、 第二驱动电路 13和控 制模块 40。
[0043] 底座 101用于支撑工作台 102, 可将电动工具 100平稳地放置于地面或操作平面 上。 工作台 102可转动地连接至底座 101, 用于放置加工件。 锯片 103与工作台 10 2通过支架 104枢转连接, 用于切割加工件。 电机 30用于提供动力来源, 电机 30 驱动锯片 103对放置在工作台 102的加工件进行切割。
[0044] 电动工具 100的整体结构与一般的斜锯结构大体相同, 这里不再做详细赘述。
[0045] 参考图 2和图 3所示的电机 30的结构示意图。 电机 30包括能驱动锯片 103的转子 3 3和用于产生驱动转子 33的磁场的定子 31。 电机 30通电吋, 定子 31产生磁场驱动 转子 33转动, 进而带动与转子连接的锯片 103以切割加工件。 具体的, 电机 30为 无刷直流内转子电机。 当然。 电机 30也可以外转子电机。
[0046] 转子 33被设置为绕一中心轴线转动。 转子 33上设有用于产生磁场的永磁体 331 , 永磁体槽 331沿中心轴线的周向间隔排列, 用于放置能产生或感应磁场的永磁 体 332。 转子 33套设在定子 31内并与定子 31之间形成径向间隙。
[0047] 定子 31包括环轭部 341、 多个向环轭部 341内侧凸出形成的齿部 342 (若电机为 外转子电机则定子包括多个向环轭部 341外侧凸出形成的齿部) 、 若干个第一类 绕组和若干个第二类绕组。 若干个第一类绕组缠绕在若干齿部 342中的一部分, 若干个第二类绕组缠绕在若干齿部中的另一部分。 其中, 第一类绕组和第二类 绕组沿中心轴线的周向间隔设置。
[0048] 这里所说的第一类绕组和第二类绕组沿中心轴线的周向间隔设置是指在沿中心 轴线的周向方向上, 只要存在至少一个第一类绕组位于两个第二类绕组之间即 视为存在第一类绕组和第二类绕组沿中心轴线的周向间隔设置。
[0049] 作为一种具体的实施方式, 如图 3所示, 定子包括六个向环轭部 341内侧凸出形 成的齿部 342、 343、 344、 345、 346、 347。 三个第一类绕组 311、 312、 313分别 缠绕在部分齿部 342、 344、 346上。 三个第二类绕组 321、 322、 323分别缠绕在 另一部分齿部 343、 345、 347上。 第一类绕组 311、 312、 313和第二类绕组 321、 322、 323在沿中心轴线的周向上彼此之间两两间隔设置。
[0050] 具体的, 第一类绕组 311、 312、 313采用相同直径的第一绕线分别缠绕在齿部 3 42、 344、 346上。 每一个第一类绕组 311、 312、 313各自具有一个接入端 31 la、 3 12a、 313a和一个接出端 311b、 312b、 313b。 接入端 311a、 312a、 313a用于分别 接入第一电源接入电路接入的第一电压。 接出端 311b、 312b. 313b用于与其它 第一类绕组的接入端或接线端连接以使三个第一类绕组之间构成星型或三角型 连接。
[0051] 第二类绕组 321、 322、 323均采用与第一绕线直径不同的第二绕线缠绕在齿部 3 43、 345、 347上。 同样的, 每一个第二类绕组 321、 322、 323各自具有一个接入 端 321a、 322a 323a和一个接出端 321b、 322 b、 323
b。 接入端 321a、 322a. 323a用于分别接入第二电源接入电路接入的第二电压。 接出端 311b、 312b. 313b用于与其它第二类绕组的接入端或接线端连接以使三 个第二类绕组之间构成星型或三角型连接。
[0052] 采用这样的设计, 第一类绕组的接入端 311a、 312a. 313a与第二类绕组的接入 端 321a、 322a. 323a可接入不同电压值的电压, 使得电机 30能够接入不同的电压 。 第一类绕组和第二绕组可依据电机 30的应用需求选择直径、 匝数和到电阻率 不同的绕线。 在该实施例中, 电机 30的每一个齿部被一个绕组缠绕。 电机 30为 六槽三相电机。
[0053] 作为另一种具体的实施方式, 如图 4所示的另一电机 30'的结构图, 同样包含缠 绕在若干齿部的一部分的三个第一类绕组 311'、 312'、 313'和缠绕在若干齿部的 另一部分的三个第二类绕组 321,、 322,、 323,。
[0054] 每一个第一类绕组 311'、 312,、 313'各自具有一个接入端 311'a、 312,a、 313'a 和一个接出端 311'b、 312'b、 313'b。 每一个第二类绕组 32Γ、 322'、 323'各自具 有一个接入端 321'a、 322'a、 323'a和一个接出端 321'b、 322'b、 323'b。 接入端 32 l'a、 322'a、 323'a接入与第一电压, 接入端 321'a、 322'a、 323'a接入与第一电压 不同的第二电压, 使得电机 30'能够接入不同的电压。
[0055] 与图 2所示的电机的不同之处在于电机 30'的一个绕组缠绕在多个齿部上。 具体 的, 如图 3所示, 一个绕组缠绕在 3个相邻的齿部上。 当然, 一个绕组也可缠绕 在 2个或更多的齿部上。
[0056] 显然, 作为拓展方案, 还可将电机中的第一类绕组缠绕在两个齿部上、 第二类 绕组缠绕在三个齿部上, 且第一类绕组与第二类绕组沿中心轴线的周向方向间 隔排列, 第一类绕组位于两个第二类绕组之间。
[0057] 参考图 5所示, 第一类绕组 311、 312、 313与第二类绕组 321、 322、 323可采用 不同的连线方式形成两组三相接线端以接入不同的电压。 具体的, 第一类绕组 3 11、 312、 313的接出端 311b、 312b. 313b彼此连接至一中性点 O构成星型连接, 且第二类绕组 321、 322、 323的接出端 321b、 322 b. 323 b彼此连接至一中性点 构成星型连接。 或者, 第一类绕组 311、 312、 313的接线端彼此首尾相连构成角 型连接, 且第二类绕组 321、 322、 323的接线端彼此首尾相连构成角型连接。 或 者, 第一类绕组 311、 312、 313和第二类绕组 321、 322、 323中的一个角型连接 而另一个星型连接 (如图 5所示) 。
[0058] 采用上述方案的电机, 即将第一类绕组和第二类绕组沿中心轴线的周向间隔设 置, 电机的第一类绕组个数与第二类绕组个数为电机的相数的偶数倍。 具体的 , 对三相电机而言, 第一类绕组个数与第二类绕组的个数之和为 6的倍数。
[0059] 第一电源接入电路 10用于接入一个具有第一电压的第一电源。 第二电源接入电 路 20用于接入一个具有第二电压的第二电源。 其中, 第一电源的第一电压不同 于第二电源的第二电压。 也就是说, 第一电源和第二电源可以是两个电压不同 的直流电源, 也可以是两个电压不同的交流电源, 还可以是电压不同的交流电 源和直流电源。
[0060] 具体的, 在电动工具 100中, 第一电源接入电路 10包括电池包接口 105, 电池包 接口 105设置在支架 104上, 用于接入电池包 107所提供的直流电。 第二电源接入 电路 20包括交流电插头 106, 可接入交流市电。 可能的, 直流电的电压小于交流 电电压。
[0061] 作为具体实施方案的一种, 第一电源接入电路 10接入直流电, 若干第一类绕组 之间构成角型连接, 第二电源接入电路 20接入交流电, 若干第二类绕组之间构 成星型连接, 采用这样的连接方式避免了电动工具因接入不同的电源可能引入 的互相干扰, 绕线方式简单。
[0062] 第一滤波电路 15与第一电源接入电路 10电性连接, 用于滤除第一电源接入电路 10接入的第一电源信号中的杂波。 具体的, 第一滤波电路 15包括滤波电容 Cl。
[0063] 参考图 6所示, 在第二电源接入电路 20接入交流市电吋, 在第二电源接入电路 2 0与电机 30之间串接整流模块 40, 用于将交流电转换为直流电输出以为电机 30供 电。 具体的, 整流模块 40包括整流桥和 EMI电路。
[0064] 第二滤波电路 25与第二电源接入电路 20电性连接, 更具体的, 第二滤波电路 25 与整流模块 21电性连接, 用于滤除整流模块 21输出的直流电中的杂波以提供平 滑的直流电信号至电机 30。 具体的, 第二滤波电路 25包括滤波电容 C2。
[0065] 第一电源模块 14与第一电源接入电路 10电连接, 用于为电动工具中的其它电路 或模块供电。 具体的, 第一电源模块 14接入的第一电源的电压经第一电源模块 1 4转换后给第一驱动电路 12、 第一驱动芯片 13和控制模块 40供电。
[0066] 第二电源模块 24与第二电源接入电路 20电连接, 第二电源模块 24接入的第二电 源的电压经第二电源模块 24转换后给第二驱动电路 22和第二驱动芯片 23供电。
[0067] 显然, 在一些具体的电路中, 第一电源模块 14和第二电源模块 24也可以构成一 个整体的电源模块为第一驱动电路 12、 第二驱动电路 22、 第一驱动芯片 13、 第 二驱动芯片 14和控制模块 40供电。
[0068] 第一驱动电路 12包括若干第一类电子幵关, 连接在第一类绕组 311、 312、 313 与第一电源接入电路 10之间。 参考图 7所示, 第一驱动电路 12包括六个第一类电 子幵关 Ql, Q2, Q3 , Q4, Q5, Q6, 这六个第一类电子幵关具有各自的使能端 UH、 UL、 VH、 VL、 WH、 WL作为第一驱动电路 12的输入端以接收控制模块 40 的控制信号。 第一驱动电路 12具有三个输出端 12a、 12b、 12c。 输出端 12a与第一 类绕组 311的接入端 311a连接, 输出端 12b与第一类绕组 312的接入端 312a连接, 输出端 12c与第一类绕组 313的接入端 313a连接。 使得第一电源接入电路 10接入的 第一电源经第一驱动电路 12的输出端 12a、 12b、 12c接入至第一类绕组 311、 312 、 313, 以提供使电机 30工作的电能。 具体的, 第一类电子幵关为半导体功率管
[0069] 为使第一驱动电路 12能够响应控制模块 40输出的控制信号, 在第一驱动电路 12 与控制模块 40之间串联第一驱动芯片 13。 第一驱动芯片 13用于将控制模块 40输 出的控制信号转换为能够被第一驱动电路 12所识别的电压信号输出至第一驱动 电路 12。 当然, 在一些具体电路结构中, 第一驱动芯片 13与第一驱动电路 12也 可组成为整体电路。
[0070] 同样的, 在控制模块 40与第二驱动电路 22之间串联第二驱动芯片 23。 第二驱动 芯片 23用于将控制模块 40输出的控制信号转换为能够被第二驱动电路 22所识别 的电压信号输出至第二驱动电路 22。 第二驱动芯片 23与第二驱动电路 23也可组 成为整体电路。 在另一具体电路结构中, 第一驱动芯片 13和第二驱动芯片 23也 可组成一个整体驱动芯片连接至控制模块 40。
[0071] 第二驱动电路 22包括若干第二类电子幵关, 连接在第二类绕组 321、 322、 323 与第二电源接入电路 20之间。 同样的, 第二驱动电路 22包括六个第二类电子幵 关, 这六个第二类电子幵关具有各自的使能端 UH'、 UL'、 VH'、 VL'、 WH'、 W L'作为第二驱动电路 22的输入端以接收控制模块 40的控制信号。 第二驱动电路 22 具有三个输出端 22a、 22b、 22c。 输出端 22a与第二类绕组 321的接入端 321a连接 , 输出端 22b与第二类绕组 322的接入端 322a连接, 输出端 22c与第二类绕组 323的 接入端 323a连接。 使得第二电源接入电路 20接入的第二电源经第二驱动电路 22的 输出端 22a、 22b、 22c接入至第二类绕组 321、 322、 323, 以提供使电机 30工作的 电能。 具体的, 第二类电子幵关为半导体功率管。
[0072] 第一类电子幵关和第二类电子幵关可为耐压值不同的电子幵关。 具体的, 第一 电源接入电路 12接入直流电, 第二电源接入电路 22接入交流电, 第一类电子幵 关的耐压值低于第二类电子幵关的耐压值。 两类电子幵关避免了第一电源接入 电路与第二电源接入电路接入的不同电源的影响, 采用不同耐压值的电子幵关 在增加电动工具安全性的同吋减低了生产成本。 直流电的电压的取值范围为 14V -60V, 进一步, 直流电的电压的取值范围为 18V~56V, 交流电的电压取值范围 为 110V 130V或 210V~230V。
[0073] 位置检测模块 50与电机 30电性连接, 用于检测电机 30的转子的位置。 位置检测 模块 50的输出端连接至控制模块 40。 具体的, 位置检测模块 50包括霍尔传感器 , 设置在转子铁芯上以检测转子转动的位置。 当然, 也可设置多个位置检测模 块 50检测转子的位置。
[0074] 控制模块 40用于产生使第一类电子幵关或第二类电子幵关导通或关断的控制信 号。 具体的, 控制模块 40依据位置检测模块 50检测的转子的位置, 输出控制第 一驱动电路 12中各个功率幵关管导通或关断的第一控制信号, 从而将第一电源 接入电路 10施加至第一驱动电路 12的第一电压供应至第一类绕组的接入端 311a、 312a、 313a作为三相电压。
[0075] 在第一电源接入电路 12接入的第一电源为直流电源, 而第二电源接入电路 22接 入的第二电源为交流电源吋, 控制器 40仅产生导通或关断第二类电子幵关的第 二控制信号而不产生驱动导通或关断第一类电子幵关的第一控制信号。 也就是 说, 电动工具 100在同吋接入直流电和交流电源吋, 仅接入交流电源为电机提供 电能。 检测电路 60用于检测第一电源接入电路 10是否接入第一电源或第二电源 接入电路 20是否接入第二电源。 在第一电源接入电路 10与第一驱动电路 12之间 串联一幵关 16, 幵关 16用于导通或断幵第一电源接入电路 10与第一驱动电路 12 的电连接。 具体而言, 当检测电路 60检测第二电源接入电路 20接入第二电源吋 检测电路 60, 输出断幵第一电源接入电路 10与第一驱动电路 12的电连接的控制 信号至幵关 16, 此吋第二电源接入电路 20接入的第二电源为电机供电。 反之亦 成立。
[0076] 更具体的, 第一电源接入电路 10接入电池包提供的直流电, 第二电源接入电路 20包括交流电插头, 用于接入交流电。 这样采用上述方案在电动工具 100同吋有 直流电和交流电接入吋, 仅通过接入交流电的第二电源模块 20给电动工具 100供 电, 节约电能。
[0077] 在交流电插头接入的交流电断电吋, 控制模块 40先产生断幵所有第一类电子幵 关的控制信号, 再产生导通或关断第一类电子幵关的控制信号, 以使第一电源 接入电路 10接入第一电源, 例如电池包的直流电为电机 30供电。 这样能够保证 用户使用安全。
[0078] 信号幵关 43分别与第一电源接入电路 10、 第二电源接入电路 20和控制模块 40电 性连接。 信号幵关 43用于发送启动或激活控制模块 40的控制信号。
[0079] 指示模块 70用于指示第一电源接入电路 10是否接入第一电源和 /或第二电源接 入电路 20是否接入电源。 指示模块 70与检测电路连接。 具体的, 指示模块 70包 括第一指示单元 71和第二指示单元 72。 第一指示单元 71具有指示第一电源接入 电路 10接入第一电源和第一电源接入电路 10没有接入第一电源的两种状态。 第 二指示单元 72具有指示第二电源接入电路 20接入第二电源的和第二电源接入电 路 20没有接入第二电源的两种状态。 更具体的, 第一指示单元 71和第二指示单 元 72均包括指示灯, 有电源接入则指示灯亮, 无电源接入则指示灯不亮。 在检 测电路 60检测第一电源接入电路 10接入第一电源吋第一指示单元 71的指示灯亮 , 在检测第二电源接入电路 20接入第二电源吋第二指示单元 72的指示灯亮。
[0080] 下面将具体说明 0电动工具 100的工作过程。
[0081] 用户触发信号幵关 43, 信号幵关 43发送控制信号至控制模块 40, 控制模块 40被 激活。
[0082] 检测电路 60检测第一电源接入电路 10是否接入直流电和 /或第二电源接入电路 2
0是否接入交流电。
[0083] 若检测电路 60检测到第一电源接入电路 10接入直流电且第二电源接入电路 20接 入交流电, 则控制模块 40输出使第二类电子幵关导通或关断的控制信号以通过 第二驱动电路 22驱动电机 30工作, 此吋由第二电源接入电路 20接入的交流电为 电机提供电能。
[0084] 若检测电路 60检测到第一电源接入电路 10接入直流电且第二电源接入电路 20没 有接入交流电, 则控制模块 40输出使第一类电子幵关导通或关断的控制信号以 通过第一驱动电路 12驱动电机 30工作, 此吋由第一电源接入电路 10接入的直流 电为电机提供电能。
[0085] 若检测电路 60检测到第一电源接入电路 10未接入直流电且第二电源接入电路 20 接入交流电, 则控制模块 40输出使第二类电子幵关导通或关断的控制信号以通 过第二驱动电路 22驱动电机 30工作, 此吋由第二电源接入电路 20接入的交流电 为电机提供电能。
[0086] 在实际应用中, 作为一种可能的实现方式, 若第一电源接入电路 10先接入直流 电, 第二电源接入电路 20后接入交流电, 则控制模块 40在检测电路 60检测到交 流电接入吋输出使第二类电子幵关导通或关断的控制信号以通过第二驱动电路 2 2驱动电机 30工作。 也就是说, 只要交流电和直流电同吋接入则控制模块 40输出 使第二类电子幵关导通或关断的控制信号以通过第二驱动电路 22驱动电机 30工 作, 以节约电能。
[0087] 作为另一种可能的实现方式, 若第一电源接入电路 10接入直流电, 且第二电源 接入电路 20接入交流电, 若第二电源接入电路 20接入的交流电断幵, 则控制模 块 40先输出使所有第一类电子幵关和所有第二电子幵关均断幵的控制信号, 在 输出使第一类电子幵关导通或闭合的控制信号以通过第一驱动电路 12驱动电机 工作, 保证用电安全。
[0088] 当然, 控制模块 40也可被设置为两个分别与第一驱动电路 12电连接的第一控制 模块和与第二驱动电路 22电连接的第二控制模块。 第一信号幵关与第一控制模 块电连接, 第二信号幵关与第二控制模块电连接。
[0089] 采用前面所述方案的电动工具 100, 能够适配两个不同电压的电源提供工作所 需的电能, 第一电源接入电路接入第一电源和第二电源接入电路接入第二电源 吋电机 30的输出特性参数基本相同, 这样使得电动工具在两个不同电压的电源 之间切换吋, 用户感受的电动工具的动力基本一致, 避免了两个不同电压的电 源切换使得电机输出特性参数存在差异而影响用户使用体验。
[0090] 电机 30的输出特性参数基本相同是指在电机的转速、 扭矩或输出功率大致相同 。 具体的, 在电动工具的第二电源接入电路接入第二电源吋电机的转速为第一 电源接入电路接入第一电源吋电机的转速的 0.8至 1.2倍。 更具体的, 在电动工具 的第二电源接入电路接入第二电源吋电机的转速为第一电源接入电路接入第一 电源吋电机的转速的 0.8至 0.9倍或 1.1至 1.2倍。
[0091] 电动工具的第二电源接入电路接入第二电源吋电机的输出功率为第一电源接入 电路接入第一电源吋电机的输出功率的 0.8至 1.2倍。 更具体的, 在电动工具的第 二电源接入电路接入第二电源吋电机的输出功率为第一电源接入电路接入第一 电源吋电机的输出功率的 0.8至 0.9倍或 1.1至 1.2倍。
[0092] 电动工具的第二电源接入电路接入第二电源吋电机的扭矩为第一电源接入电路 接入第一电源吋电机的扭矩的 0.8至 1.2倍。 更具体的, 在电动工具的第二电源接 入电路接入第二电源吋电机的扭矩为第一电源接入电路接入第一电源吋电机的 扭矩的 0.8至 0.9倍或 1.1至 1.2倍。
[0093] 参考图 8所示的另一种电机的结构图。 电机 30"包括被设置为绕一中心轴线转动 的转子 33"和用于产生驱动转子 33的磁场的定子 31"。
[0094] 转子 33"上设有用于产生磁场的永磁体 331", 永磁体槽 331"沿中心轴线的周向 间隔排列, 用于放置能产生或感应磁场的永磁体 332"。 转子 33"套设在定子 31"内 并与定子 31"之间形成径向间隙。
[0095] 定子 31"包括环轭部 341"、 多个向环轭部 341"内侧或外侧凸出形成的齿部 342" 、 若干个第一类绕组和若干个第二类绕组。 第一类绕组用于在第一电源作用下 产生第一磁场, 第二类绕组用于在第二电源作用下产生与第一磁场重叠的第二 磁场。 第一类绕组和第二类绕组沿中心轴线的径向设置。
[0096] 电机 30"的第一类绕组 311"、 312"、 313"、 314"、 315"、 316"和第二类绕组 321" 、 322"、 323"、 324"、 325"、 326"沿中心轴线的径向设置。 具体的, 以第一类绕 组 311"和第二类绕组 321"为例进行说明, 在同一齿部上沿中心轴线的径向依次设 置第一类绕组 311"和第二类绕组 321", 第一类绕组 311"和第二类绕组 321"之间设 置绝缘层以隔绝两个磁场的相互干扰。
[0097] 需要说明的是, 这里的同一齿部包括同一个的多个齿部和同一个的单个齿部。
[0098] 这样, 若干个第一类绕组彼此之间以串联或并联的方式连接形成三个电压接入 端以接入第一电源。 若干个第二类绕组彼此之间以串联或并联的方式连接形成 另三个电压接入端以接入第二电源。
[0099] 下面结合图 8至图 10所示说明电机 30"中各个绕组的连接。
[0100] 每个第一类绕组具有接入端 31 l"a、 312"a、 313,,a、 314"a、 315,,a、 316"a和接 出端 311,,b、 312"b、 313"b、 314"b、 315,,b、 316,,b。 相对于中心轴线对称设置的 两个第一类绕组 311"与第一类绕组 314"并联或串联连接构成具有第一接入端 311" c和第二接入端 311"d的支路。 同样的, 第一类绕组 312"与第一类绕组 315"并联或 串联连接构成具有第一接入端 312"c和第二接入端 312"d的支路; 第一类绕组 313" 与第一类绕组 316"并联或串联连接构成具有第一接入端 313"c和第二接入端 313"d 的支路。 第一接入端 312"c、 312,,c、 313"c和第二接入端 312"d、 312,,d、 313"d彼 此首尾相连使得第一类绕组构成角型连接。 第二接入端 312"d、 312"d、 313"d连 接至同一中性点则第一类绕组构成星型连接。 第一接入端 312"c、 312"c、 313"c 作为第一类绕组的三个接线端分别与第一驱动电路 12"的输出端 12"a、 12"b、 12" c连接, 以接入第一电源。
[0101] 每个第二类绕组具有接入端 322"a、 322"a、 323"a、 324"a、 325"a、 326"a和接 出端 322"b、 322,,b、 323"b、 324,,b、 325,,b、 326,,b。 相对于中心轴线对称设置的 两个第二类绕组 322"与第二类绕组 324"并联或串联连接构成具有第二接入端 322" c和第二接入端 322"d的支路。 同样的, 第二类绕组 322"与第二类绕组 325"并联或 串联连接构成具有第二接入端 322"c和第二接入端 322"d的支路; 第二类绕组 323" 与第二类绕组 326"并联或串联连接构成具有第二接入端 323"c和第二接入端 323"d 的支路。 第二接入端 322"c、 322"c、 323"c和第二接入端 322"d、 322"d、 323"d彼 此首尾相连使得第二类绕组构成角型连接。 第二接入端 322"d、 322"d、 323"d连 接至同一中性点则第一类绕组构成星型连接。 , 接入端 322"c、 322"c、 323"c作 为第二类绕组的三个接线端分别与第二驱动电路 22"的输出端 22"a、 22"b、 22"c 连接, 以接入第二电源。
[0102] 参考图 11所示的电动工具 100的另一电路连接图, 包括第一电源接入电路 10"、 第二电源接入电路 20"、 电机 30"、 第一驱动电路 12"、 第二驱动电路 13"、 第一 电源模块 14"、 第一滤波电路 15"、 第二滤波电路 25"、 第二电源模块 24"、 第一驱 动芯片 13"、 第二驱动芯片 23"、 第一控制模块 41"、 第二控制模块 42"、 信号幵关 43"、 位置检测模块 50"、 检测电路 60"、 幵关 16"和指示模块 70"。
[0103] 与上述的实施例的不同之处在于在电动工具 100中分别设置用于控制第一驱动 电路 12"的第一控制模块 41"和用于控制第二驱动电路 22"的第二控制模块 42"。 第 一控制模块 41"与第二控制模块 42"之间通讯连接。 在第二控制模块 42"输出使第 二类电子幵关导通或断幵的控制信号吋, 第一控制模块 41"不输出使第一类电子 幵关导通或断幵的控制信号。
[0104] 还可设置一信号幵关 43"用于启动或关闭第一控制模块 41"和第二控制模块 42" 中的一个。 信号幵关 43"的输入端分别连接第一电源接入电路 10"和第二电源接入 电路 20"。 在第一电源接入电路 10"接入第一电源吋, 信号幵关 43"启动第一控制 模块 41", 即导通第一电源模块 14"与第一控制模块 41"的电连接而断幵第二电源 模块 24"与第二控制模块 42"的电连接。 在第二电源接入电路 20"接入第二电源吋 , 信号幵关 43"启动第二控制模块 42"且关闭第一控制模块 41", 即导通第二电源 模块 24"与第二控制模块 42"的电连接而断幵第一电源模块 14"与第一控制模块 42" 的电连接。
[0105] 当然, 电源锯、 曲线锯、 往复锯、 角磨、 切割机、 割草机等能够接入交流电和 直流电的电动工具均可采用上述方案。
[0106] 以上显示和描述了本发明的基本原理、 主要特征和优点。 本行业的技术人员应 该了解, 上述实施例不以任何形式限制本发明, 凡采用等同替换或等效变换的 方式所获得的技术方案, 均落在本发明的保护范围内。

Claims

权利要求书
[权利要求 1] 一种电动工具, 包括:
电机, 包括:
转子, 被设置为能绕一中心轴线转动;
定子, 包括环轭部和多个向所述环轭部内侧或外侧凸出形成的齿部; 若干第一类绕组, 用于缠绕在所述多个齿部中的一部分;
若干第二类绕组, 用于缠绕在所述多个齿部中的另一部分; 第一电源接入电路, 用于接入一个具有第一电压的第一电源; 第一驱动电路, 包括:
若干第一类电子幵关, 连接在所述第一类绕组与所述第一电源接入电 路之间;
第二电源接入电路, 用于接入一个具有第二电压的第二电源; 第二驱动电路, 包括:
若干第二类电子幵关, 连接在所述第二类绕组与所述第二电源接入电 路之间;
其中, 所述第一类绕组和所述第二类绕组沿所述中心轴线的周向间隔 设置。
[权利要求 2] 根据权利要求 1所述的电动工具, 其特征在于,
还包括:
控制模块, 用于产生使若干所述第一类电子幵关或 /和若干所述第二 类电子幵关导通或关断的控制信号;
所述控制模块与所述第一驱动电路和所述第二驱动电路电性连接。
[权利要求 3] 根据权利要求 1所述的电动工具, 其特征在于,
还包括:
检测电路, 用于检测所述第一电源接入电路是否接入所述第一电源; 幵关, 用于导通或断幵所述第一电源接入电路与所述第一驱动电路之 间的电连接;
在所述第二电源接入电路接入所述第二电源吋, 所述检测电路控制所 述幵关断幵所述第一电源接入电路与所述第一驱动电路之间的电连接 根据权利要求 1所述的电动工具, 其特征在于,
还包括:
指示模块, 用于指示所述第一电源接入电路是否接入所述第一电源和
/或所述第二电源接入电路是否接入第二电源;
所述指示模块与所述第一电源接入电路和所述第二电源接入电路电性 连接。
根据权利要求 1所述的电动工具, 其特征在于,
还包括:
指示模块, 包括:
第一指示单元, 用于指示所述第一电源接入电路是否接入所述第一电 源;
第二指示单元, 用于指示所述第二电源接入电路是否接入所述第二电 源;
所述第一指示单元与所述第一电源接入电路电性连接;
所述第二指示单元与所述第二电源接入电路电性连接。
根据权利要求 2所述的电动工具, 其特征在于,
还包括:
信号幵关, 用于发送启动或激活所述控制模块的幵关信号。
根据权利要求 1所述的电动工具, 其特征在于,
所述第一类绕组个数与所述第二类绕组个数之和为所述电机的相数的 偶数倍。
根据权利要求 1所述的电动工具, 其特征在于,
所述电机为三相电机, 所述第一类绕组个数与所述第二类绕组个数之 和为 6的倍数。
根据权利要求 1所述的电动工具, 其特征在于,
所述第一电源接入电路接入所述第一电源吋所述电机的输出特性参数 与所述第二电源接入电路接入所述第二电源吋所述电机的输出特性参 数基本相同;
所述电机的输出特性参数包括电机的转速、 扭矩或输出功率。
[权利要求 10] 根据权利要求 1所述的电动工具, 其特征在于,
所述第一类绕组与所述第二类绕组的绕线直径和 /或绕线匝数不同。
[权利要求 11] 根据权利要求 1所述的电动工具, 其特征在于,
所述第一电源接入电路接入的第一电源为直流电源, 所述第二电源接 入电路接入的第二电源为交流电源, 所述若干第一类绕组之间构成角 型连接, 所述若干第二类绕组之间构成星型连接。
[权利要求 12] 根据权利要求 11所述的电动工具, 其特征在于,
所述第一类电子幵关的耐压值低于所述第二类电子幵关的耐压值。
[权利要求 13] —种电动工具, 包括:
第一电源接入电路, 用于接入一个具有第一电压的第一电源; 第二电源接入电路, 用于接入一个具有第二电压的第二电源; 电机, 包括:
转子, 被设置为能绕一中心轴线转动;
定子, 包括环轭部和多个向所述环轭部内侧或外侧凸出形成的齿部; 第一类绕组, 用于在所述第一电源作用下产生第一磁场;
第二类绕组, 用于在所述第二电源作用下产生与所述第一磁场重叠的 第二磁场;
第一驱动电路, 包括:
若干第一类电子幵关, 连接在所述第一类绕组与所述第一电源接入电 路之间;
第二电源接入电路, 用于接入一个具有第二电压的第二电源; 第二驱动电路, 包括:
若干第二类电子幵关, 连接在所述第二类绕组与所述第二电源接入电 路之间,
其中, 所述第一类绕组和所述第二类绕组沿所述中心轴线的径向设置 根据权利要求 13所述的电动工具, 其特征在于,
还包括: 绝缘层, 设置在所述第一类绕组和所述第二类绕组之间。 根据权利要求 13所述的电动工具, 其特征在于,
还包括:
第一控制模块, 用于产生使若干所述第一类电子幵关导通或关断的控 制信号;
第二控制模块, 用于产生使若干所述第二类电子幵关导通或关断的控 制信号;
所述第一控制模块与所述第二控制模块通讯连接。
根据权利要求 13所述的电动工具, 其特征在于,
检测电路, 用于检测所述第一电源接入电路是否接入所述第一电源; 幵关, 用于导通或断幵所述第一电源接入电路与所述第一驱动电路之 间的电连接;
在所述第二电源接入电路接入所述第二电源吋, 所述检测电路控制所 述幵关断幵所述第一电源接入电路与所述第一驱动电路之间的电连接 根据权利要求 13所述的电动工具, 其特征在于,
还包括:
指示模块, 包括:
第一指示单元, 用于指示所述第一电源接入电路是否接入所述第一电 源;
第二指示单元, 用于指示所述第二电源接入电路是否接入所述第二电 源;
所述第一指示单元与所述第一电源接入电路电性连接;
所述第二指示单元与所述第二电源接入电路电性连接。
根据权利要求 15所述的电动工具, 其特征在于,
还包括: 信号幵关, 用于发送启动或激活所述第一控制模块或所述第二控制模 块的幵关信号。
[权利要求 19] 根据权利要求 13所述的电动工具, 其特征在于,
所述电机为三相电机。
[权利要求 20] 根据权利要求 13所述的电动工具, 其特征在于,
所述第一电源接入电路接入的第一电源为交流电源, 所述第二电源接 入电路接入的第二电源为直流电源;
所述第一电源接入电路接入所述第一电源吋所述电机的输出特性参数 与所述第二电源接入电路接入所述第二电源吋所述电机的输出特性参 数的比值的取值范围为 0.8~1.2;
所述电机的输出特性参数包括电机的转速、 扭矩或输出功率。
[权利要求 21] 根据权利要求 13所述的电动工具, 其特征在于,
所述第一类绕组与所述第二类绕组的绕线直径和 /或绕线匝数不同。
[权利要求 22] 根据权利要求 13所述的电动工具, 其特征在于,
所述第一电源接入电路接入的第一电源为直流电源, 所述第二电源接 入电路接入的第二电源为交流电源, 所述若干第一类绕组之间构成角 型连接, 所述若干第二类绕组之间构成星型连接。
[权利要求 23] 根据权利要求 22所述的电动工具, 其特征在于,
所述第一类电子幵关的耐压值低于所述第二类电子幵关的耐压值。
PCT/CN2016/104808 2016-07-29 2016-11-07 电动工具 WO2018018777A1 (zh)

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CN114257157A (zh) * 2020-09-21 2022-03-29 南京德朔实业有限公司 电动工具及其控制方法
DE102021201617A1 (de) 2021-02-19 2022-08-25 Robert Bosch Gesellschaft mit beschränkter Haftung Elektromotor zum wahlweisen Betrieb mit zumindest zwei unterschiedlichen Versorgungsspannungen sowie Umschaltvorrichtung für den Elektromotor
DE102021201620A1 (de) 2021-02-19 2022-08-25 Robert Bosch Gesellschaft mit beschränkter Haftung Elektrisches Bearbeitungsgerät zum wahlweisen Betrieb mit zumindest zwei unterschiedlichen Versorgungsspannungen
DE102021201621A1 (de) 2021-02-19 2022-08-25 Robert Bosch Gesellschaft mit beschränkter Haftung Elektrisches Bearbeitungsgerät zum wahlweisen Betrieb mit zumindest zwei unterschiedlichen Versorgungsspannungen
DE102021201619A1 (de) 2021-02-19 2022-08-25 Robert Bosch Gesellschaft mit beschränkter Haftung Umschaltvorrichtung für einen Elektromotor zum wahlweisen Betrieb mit zumindest zwei unterschiedlichen Versorgungsspannungen sowie elektrisches Bearbeitungsgerät mit einer Umschaltvorrichtung
DE102022206132A1 (de) 2022-06-20 2023-12-21 Robert Bosch Gesellschaft mit beschränkter Haftung Elektrisches Bearbeitungsgerät sowie System umfassend ein elektrisches Bearbeitungsgerät und ein externes Energieversorgungsgerät

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