WO2007083447A1 - Regulateur de vitesse pour outil de decoupe electrique portable - Google Patents

Regulateur de vitesse pour outil de decoupe electrique portable Download PDF

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Publication number
WO2007083447A1
WO2007083447A1 PCT/JP2006/323592 JP2006323592W WO2007083447A1 WO 2007083447 A1 WO2007083447 A1 WO 2007083447A1 JP 2006323592 W JP2006323592 W JP 2006323592W WO 2007083447 A1 WO2007083447 A1 WO 2007083447A1
Authority
WO
WIPO (PCT)
Prior art keywords
speed
motor
soft start
cutting tool
portable electric
Prior art date
Application number
PCT/JP2006/323592
Other languages
English (en)
Japanese (ja)
Inventor
Yasuharu Okada
Original Assignee
Ryobi Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ryobi Ltd. filed Critical Ryobi Ltd.
Priority to CN2006800501583A priority Critical patent/CN101351955B/zh
Publication of WO2007083447A1 publication Critical patent/WO2007083447A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/12—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/001—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/02—Details of starting control
    • H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/10—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors for preventing overspeed or under speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
    • H02P7/295—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC of the kind having one thyristor or the like in series with the power supply and the motor

Definitions

  • the present invention relates to a speed control device for a portable electric cutting tool, and particularly relates to a device having a soft start function.
  • the soft start for example, as shown in FIG. 4, when it is assumed that there is no overshoot, in the constant speed operation region, in the speed control in which the rotation speed of the motor is controlled at the set speed vl,
  • the acceleration operation area is activated with the slope A by the soft start time tl and when the acceleration operation area is activated with the inclination B by the soft start time t2 (> tl) longer than the soft start time tl
  • the reaction at the start at the inclination B is smaller.
  • Patent Document 1 Japanese Patent Publication No. 3-6744
  • An object of the present invention occurs when shifting from an acceleration operation region to a constant speed operation region without increasing the soft start time by devising speed control of the electric motor in a portable electric cutting tool.
  • the purpose is to improve the workability and operability of the portable electric cutting tool by suppressing the reverse reaction from the start-up.
  • the acceleration operation region force is deliberately suppressed in order to suppress the reaction reverse to the start-up when moving to the constant speed operation region.
  • the overshoot was forcibly generated.
  • the portable electric cutting tool having a soft start function for causing the rotational speed of the electric motor to reach the set speed in the constant speed operation region after a predetermined soft start time as the starting force
  • the motor rotation speed overshoot control is forced so that the rotation speed of the motor once exceeds the set speed in the constant speed operation region and then decreases to the set speed.
  • Provide speed control means to perform automatically.
  • the speed control means performs overshoot control by reducing the responsiveness of the rotational speed feedback control (phase control voltage) to the electric motor.
  • overshoot can be easily generated.
  • the portable electric cutting tool is an electric circular saw.
  • a portable electric cutting tool that can effectively exhibit the above-described effects can be obtained.
  • the rotation speed of the motor is set to the optimum setting speed for cutting. Forced overshoot control to drop to the set speed after exceeding once, to reduce the reverse reaction when the soft start area ends without accelerating the soft start time and acceleration force increases Therefore, both the operability and workability of the portable electric cutting tool can be improved.
  • overshoot control can be easily performed by reducing the response of the phase control voltage to the motor and performing the overshoot control.
  • FIG. 1 is a circuit diagram of a speed control device for an electric circular saw according to an embodiment of the present invention.
  • FIG. 2 is a right side view showing the configuration of the electric circular saw.
  • Fig. 3 is a characteristic diagram showing a characteristic in which the motor rotation speed is changed by overshoot control.
  • FIG. 4 is a characteristic diagram for explaining the soft start function.
  • a Electric circular saw (portable electric cutting tool)
  • FIG. 2 shows the configuration of an electric circular saw A as a portable electric cutting tool according to an embodiment of the present invention. Shown schematically.
  • This electric circular saw A has a housing 1.
  • the housing 1 has a bottomed cylindrical motor case 2 that extends in the horizontal left-right direction (a direction orthogonal to the paper surface of FIG. 2) and has an open right end (front side in FIG. 2), and a right end of the motor case 2
  • a sealed gearbox 3 that is integrally attached and fixed to the motor
  • a circular saw blade cover 4 that is integrally assembled to the outer periphery of the right end of the motor case 2 and that is open on the lower side.
  • a motor 9 (electric motor) having an output shaft 9a extending horizontally in the horizontal direction is housed and fixed by projecting the output shaft 9a into the gear box 3, and the outer periphery of the output shaft 9a A gear portion 10 is formed on the top.
  • a handle 5 for operating the electric circular saw A is fixed to the upper part of the motor case 2 physically.
  • an intermediate shaft 17 and a saw blade shaft 18 extending horizontally and horizontally are supported so as to be rotatable.
  • a first intermediate gear 13 that meshes with the gear portion 10 of the motor output shaft 9a and has a larger diameter than the gear portion 10 is disposed at the left end portion of the intermediate shaft 17, and a first intermediate gear 13 is disposed at the right end portion.
  • a second intermediate gear 14 having a smaller diameter is provided integrally with each other.
  • a third intermediate gear 15 that meshes with the second intermediate gear 14 and has the same diameter as that of the second intermediate gear 14 is provided integrally with the left end portion of the saw blade shaft 18.
  • the right end portion of the saw blade shaft 18 protrudes outside the gear box 3, and the circular saw blade 20 is attached to the projecting portion (right end portion) by a mounting bolt 21 that is screwed to the front end surface thereof.
  • the substantially upper half of the circular saw blade 20 is covered with the circular saw blade cover 4.
  • a surface plate 7 is disposed on the lower side of the housing 1.
  • the surface plate 7 has a front end portion (right end in the figure) fastened to the front end of the housing 1 via a fastening member 6 so that the rotation angle of the circular saw blade 20 can be adjusted.
  • the amount of protrusion to the bottom of the surface plate 7 (the cutting depth of the electric circular saw A) is adjusted.
  • Reference numeral 8 denotes a safety cover that is rotatably supported at the right end of the gear box 3.
  • the safety cover 8 enters the circular saw blade cover 4 of the housing 1 while being rotated by being pushed by the work when cutting a work (not shown). 22 is the above circular saw blade force This is a chip discharge opening opened in the right wall of bar 4.
  • FIG. 1 shows a circuit diagram of a speed control device A1 for controlling the rotational speed (number of revolutions) of the motor 9 of the electric circular saw A having the above configuration.
  • This speed control device A1 is connected to a commercial power supply 100VAC by turning on an operation switch (not shown) provided on the handle 5 of the electric circular saw A.
  • the speed control device A1 has a soft start function for causing the rotational speed of the motor 9 to reach the set speed in the constant speed operation region after a predetermined soft start time of the starting force.
  • the speed control device A1 has a dedicated IC30 (U-211B), which also has a phase control IC power having a soft start function and a rotation speed feedback function.
  • the motor 9 is composed of, for example, a commutator motor. In FIG. 1, the motor 9 is indicated by its field coil and amateur coil.
  • the IC30 includes a power supply voltage control unit 31 that controls a power supply voltage formed by a capacitor C1, a resistor R1, and a diode D1 from 100 VAC, a voltage monitoring unit 32 that monitors the voltage, and a seventh pin of the IC30 Connected to the FZV converter 33 that converts the output pulse signal (frequency) of the rotation speed sensor 43 that detects the rotation speed (rotation speed) of the motor 9 into voltage, and the motor 9 is soft-started at startup.
  • Control amplifier 35 that compares the output of the FZV converter 33 and the set speed of the constant speed operation range set by the resistor R13 connected to the 6th pin of IC30 and the variable resistor VR.
  • a phase control block 36 that performs phase control based on the output of the control amplifier 35, and a pulse output unit 37 that outputs a trigger pulse to the gate terminal of the TRIAC 44 connected to the 4th pin by the output of the phase control block 36.
  • a voltage detecting unit 38 a current detection unit 39, the load limiting section 40, a reference voltage unit 41 and the like.
  • the soft start unit 34 is configured to cause the rotational speed of the motor 9 to reach the set speed in the constant speed operation region after a predetermined soft start time has elapsed since the start-up by turning on the power.
  • the soft start time is determined by the value of the capacitor C3 connected to the 12th pin of the IC30. In this embodiment, the soft start time is set to about 0.7 seconds, for example.
  • the capacitors C7 and C8 and the resistor R7 connected to the 11th pin of the IC30 so as to make the response of the rotational speed feedback control (phase control voltage) to the motor 9 dull.
  • the rotation speed of the motor 9 Overshoot control is performed to forcibly reduce the set speed once it exceeds the set speed (optimal cutting speed) of the rolling region.
  • the capacitors C7 and C8 and the resistor R7 constitute speed control means 46 for performing overshoot control.
  • the power is supplied to the IC 30 by the capacitor Cl, the resistor R1, and the diode D1. Is supplied.
  • the trigger pulse is output from the pulse output section 37 of IC30 to the gate terminal of TRIAC44 by the 4th pin, and the motor 9 starts and starts rotating.
  • the rotational speed of the motor 9 is detected by the rotational speed sensor 43, and the rotational speed information is input to the FZV conversion 33 by the 7th pin of the IC 30 and converted into a voltage corresponding to the number of pulses.
  • a voltage corresponding to the set rotational speed set by the resistor R13 and the variable resistor VR is input to the + pole of the control amplifier 35 via the 10th pin of the IC30.
  • This voltage is compared in the control amplifier 35 with the voltage of the motor speed input to the pole and converted into the voltage, and the output of the control amplifier 35 is connected to the TRIAC 44 through the phase control block 36 and the pulse output unit 37.
  • the angle is changed, and feedback control is performed so that the rotational speed of the motor 9 detected by the sensor 43 becomes the set rotational speed.
  • the capacitors C7 and C8 and the resistor R7 Is set so as to lower (dull) the response of the rotational speed feedback control (phase control voltage). Therefore, as indicated by the solid line in Fig. 3, the motor 9's rotational speed is forcibly increased U (acceleration) during the transition from the acceleration operation region to the constant speed operation region (set speed region), resulting in overshoot. Occurs, exceeds the set speed vl, which is the optimum speed for the cutting operation, and then smoothly shifts to the set speed vl.
  • the rotation speed (speed) of the motor 9 at the end of the soft start is overshooted more than the set speed, and smoothly transitions to the set speed,
  • the reverse reaction can be suppressed and the operability of the electric circular saw A can be improved.
  • the force for performing overshoot control by slowing down the response of the rotational speed feedback control (phase control voltage) to the motor 9 is not limited to the above method. Perform overshoot control by the method described above.
  • the above embodiment is an example applied to the electric circular saw A, but the present invention can be applied to portable electric cutting tools other than the electric circular saw A, and the same function and effect. Can be played.
  • the present invention suppresses the reaction opposite to the start-up that does not increase the waiting time due to the soft start of the portable electric cutting tool more than necessary, and achieves both workability and operability. Therefore, it is extremely useful and has high industrial applicability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)
  • Control Of Electric Motors In General (AREA)
  • Motor And Converter Starters (AREA)

Abstract

Scie électrique circulaire (A) dotée d’une fonction de mise en marche progressive selon laquelle la vitesse de rotation d’un moteur (9) atteint une valeur de consigne dans un domaine de fonctionnement à vitesse constante après un temps de mise en marche progressive prédéterminé suite à la mise en marche du moteur. La réponse à l’asservissement de la vitesse de rotation appliquée au moteur (9) est ralentie et une régulation du dépassement de vitesse est réalisée à un moment donné après la mise en marche du moteur (9), ce moment correspondant et une transition entre un domaine de fonctionnement accéléré à un domaine de fonctionnement à vitesse constante. La régulation du dépassement de vitesse consiste à laisser la vitesse du moteur (9) excéder la vitesse de consigne la mieux adaptée à la découpe puis revenir à la vitesse de consigne. Ceci permet de supprimer la réaction opposée à celle apparaissant lors de la transition entre le domaine de fonctionnement accéléré et le domaine de fonctionnement à vitesse constante sans pour autant prolonger le temps de mise en marche progressive, et donc d’améliorer le fonctionnement et les performances de la scie électrique circulaire (A).
PCT/JP2006/323592 2006-01-20 2006-11-27 Regulateur de vitesse pour outil de decoupe electrique portable WO2007083447A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2006800501583A CN101351955B (zh) 2006-01-20 2006-11-27 携带用电动切断工具的速度控制装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006012657A JP4939065B2 (ja) 2006-01-20 2006-01-20 携帯用電動切断工具の速度制御装置
JP2006-012657 2006-01-20

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WO2007083447A1 true WO2007083447A1 (fr) 2007-07-26

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CN (1) CN101351955B (fr)
WO (1) WO2007083447A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10562116B2 (en) 2016-02-03 2020-02-18 Milwaukee Electric Tool Corporation System and methods for configuring a reciprocating saw
USD887806S1 (en) 2018-04-03 2020-06-23 Milwaukee Electric Tool Corporation Jigsaw
US10835972B2 (en) 2018-03-16 2020-11-17 Milwaukee Electric Tool Corporation Blade clamp for power tool
US11014176B2 (en) 2018-04-03 2021-05-25 Milwaukee Electric Tool Corporation Jigsaw
US11014224B2 (en) 2016-01-05 2021-05-25 Milwaukee Electric Tool Corporation Vibration reduction system and method for power tools

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5242974B2 (ja) * 2007-08-24 2013-07-24 株式会社マキタ 電動工具
JP5327613B2 (ja) * 2009-03-31 2013-10-30 日立工機株式会社 電動工具
CN101789748B (zh) 2009-01-19 2013-10-23 日立工机株式会社 电动工具
JP5263716B2 (ja) * 2009-01-19 2013-08-14 日立工機株式会社 電動工具
JP5605751B2 (ja) * 2010-06-30 2014-10-15 日立工機株式会社 携帯用切断機
DE102012214975A1 (de) * 2012-08-23 2014-02-27 Hilti Aktiengesellschaft Verfahren und Vorrichtung zum Regeln eines Elektromotors einer Handwerkzeugmaschine
JP6708300B2 (ja) * 2017-03-30 2020-06-10 工機ホールディングス株式会社 回転工具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332908U (fr) * 1976-08-27 1978-03-22
JPS53103627U (fr) * 1977-01-27 1978-08-21
JPS5963990A (ja) * 1982-10-01 1984-04-11 Hitachi Koki Co Ltd 電動機の定速度制御装置
JPH07195302A (ja) * 1995-02-03 1995-08-01 Hitachi Koki Haramachi:Kk 卓上切断機

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332908A (en) * 1976-09-09 1978-03-28 Taiho Kensetsu Kk Method of laying pipe body into spring water subsurface
JPS53103627A (en) * 1977-02-21 1978-09-09 Fujishiyou Riisu Kk Device for connecting external frames
CN2259716Y (zh) * 1995-12-26 1997-08-13 中国科学院沈阳自动化研究所 三相全控可控硅直流调速装置
JP2003159669A (ja) * 2001-11-22 2003-06-03 Ryobi Ltd 電動工具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332908U (fr) * 1976-08-27 1978-03-22
JPS53103627U (fr) * 1977-01-27 1978-08-21
JPS5963990A (ja) * 1982-10-01 1984-04-11 Hitachi Koki Co Ltd 電動機の定速度制御装置
JPH07195302A (ja) * 1995-02-03 1995-08-01 Hitachi Koki Haramachi:Kk 卓上切断機

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11014224B2 (en) 2016-01-05 2021-05-25 Milwaukee Electric Tool Corporation Vibration reduction system and method for power tools
US10562116B2 (en) 2016-02-03 2020-02-18 Milwaukee Electric Tool Corporation System and methods for configuring a reciprocating saw
US11433466B2 (en) 2016-02-03 2022-09-06 Milwaukee Electric Tool Corporation System and methods for configuring a reciprocating saw
US10835972B2 (en) 2018-03-16 2020-11-17 Milwaukee Electric Tool Corporation Blade clamp for power tool
USD887806S1 (en) 2018-04-03 2020-06-23 Milwaukee Electric Tool Corporation Jigsaw
US11014176B2 (en) 2018-04-03 2021-05-25 Milwaukee Electric Tool Corporation Jigsaw
US11813682B2 (en) 2018-04-03 2023-11-14 Milwaukee Electric Tool Corporation Jigsaw

Also Published As

Publication number Publication date
JP2007195366A (ja) 2007-08-02
JP4939065B2 (ja) 2012-05-23
CN101351955B (zh) 2010-12-01
CN101351955A (zh) 2009-01-21

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