CN106451904A - 风机、水泵、单相电机驱动组件及其扭矩传递机构 - Google Patents
风机、水泵、单相电机驱动组件及其扭矩传递机构 Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
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- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
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- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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- H—ELECTRICITY
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- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
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- H02K5/00—Casings; Enclosures; Supports
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- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- H—ELECTRICITY
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- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/108—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction clutches
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- H—ELECTRICITY
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- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/118—Structural association with clutches, brakes, gears, pulleys or mechanical starters with starting devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
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- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
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- 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
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- 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
- H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
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- 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
- H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
- H02P1/465—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor for starting an individual single-phase synchronous motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/26—Arrangements for controlling single phase motors
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- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/10—Spiral springs with turns lying substantially in plane surfaces
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- H—ELECTRICITY
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- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
Abstract
本发明提供电机驱动组件及其扭矩传递机构。所述电机驱动组件包括单相电机以及扭矩传递机构,所述扭矩传递机构包括受所述电机驱动的主动件、用于驱动负载单方向转动的被动件和连接装置,所述连接装置包括弹性件和减震材料,所述弹性件的一端连接至主动件,另一端连接至被动件,所述减震材料涂覆或套设于弹性件上或填充于弹性件的间隙内或所述弹性件直接由减震材料制成以降低弹性件产生的噪声。实施本发明,能够为电机驱动较大负载起到缓冲作用,避免电机启动失败并防止电机损坏,且能有效降低弹性件产生的噪音。
Description
【技术领域】
本发明涉及电机领域,更具体地,涉及一种单相电机启动并驱动负载的组件。
【背景技术】
当电机驱动转动惯量太大的负载时,电机在启动的瞬间因为不能提供足够的转动力矩而容易导致启动失败,并且可能因此损坏电机。
当该电机为单相电机时,更容易遭遇到上述的问题。
因此,亟需一种改进的方案。
【发明内容】
本发明的目的在于提供一种能够启动并驱动较大负载的单相电机驱动组件。
为此,本发明提供一种单相电机驱动组件,包括单相电机、启动电路以及扭矩传递机构,所述扭矩传递机构包括受所述电机驱动的主动件、用于驱动负载单方向转动的被动件和连接装置,所述连接装置包括弹性件和减震材料,所述弹性件的一端连接至主动件,另一端连接至被动件,所述减震材料涂覆或套设于弹性件上或填充于弹性件的间隙内或所述弹性件直接由减震材料制成以降低弹性件产生的噪声。
优选地,所述单相电机为单相永磁直流无刷电机或单相永磁同步电机。
优选地,所述主动件和被动件合围共同形成一容置空间,所述弹性件为收容于所述容置空间内的蚊香型卷绕弹簧。
优选地,所述电机包括输出轴,所述主动件连接至电机的输出轴且可随其同步旋转,所述主动件设容置槽,所述弹性件的一端收容于所述容置槽内。
优选地,所述被动件设容置槽,所述弹性件的一端收容于所述容置槽内。
优选地,所述单相电机还包括启动电路,所述定子包括定子绕组,所述定子绕组与一外部交流电源串联于第一、第二节点之间,所述启动电路包括可控双向交流开关、与所述双向交流开关并联于所述A、B节点之间的交流-直流转换电路、所述位置传感器及开关控制电路,所述交流-直流转换电路在所述可控双向交流开关导通时由于所述A、B节点被短路而无电流流过;所述开关控制电路被配置为依据所述位置传感器检测的转子磁极位置信息和所述外部交流电源的极性信息,控制所述可控双向交流开关以预定方式在正半波或负半波导通与截止状态之间切换,使所述定子绕组在电机起动阶段仅沿着预定的起动方向拖动所述转子转动。
优选地,所述转子包括若干永久磁极,所述定子包括定子叠片铁心和绕设于定子叠片铁心上的绕组,所述定子叠片铁心包括若干定子齿,每一定子齿包括朝向转子永磁极的齿面,所述齿面基本与转子同轴,每一定子齿设定位槽以便转子的初始位置偏离死点位置。
优选地,所述电机为外转子式,所述转子包括若干永久磁极,所述定子包括定子叠片铁心和绕设于定子齿上的绕组,所述永久磁极与定子齿面之间形成非均匀气隙,对应每一磁极处的气隙关于该磁极的中心线对称。
优选地,对应每一磁极处的气隙的径向宽度从磁极中心往磁极的两端逐渐增大。
另一方面,本发明提供一种扭矩传递机构,包括受外力驱动的主动件、用于驱动负载单方向转动的被动件和连接装置,所述连接装置包括弹性件和减震材料,所述弹性件的一端连接至主动件,另一端连接至被动件,所述减震材料涂覆、填充或套设于弹性件上以降低弹性件产生的噪声。
优选地,所述主动件和被动件合围共同形成一容置空间,所述弹性件为收容于所述容置空间内的蚊香型卷绕弹簧。
优选地,所述主动件设第一容置槽,所述弹性件的一端收容于所述第一容置槽内,所述被动件设第二容置槽,所述弹性件的另一端收容于所述第二容置槽内。
实施本发明,能够为电机驱动风机、水泵以及较大负载起到缓冲作用,避免电机启动失败,并防止电机损坏,且能有效从源头降低噪音。
【附图说明】
下面将结合说明书附图及实施例对本发明作进一步说明。
图1所示为本发明一个实施例提供的电机驱动组件的装配示意图;
图2所示为图1所示电机驱动组件使用的扭矩传递机构的立体示意图;
图3所示为图2的扭矩传递机构的主动件的立体示意图;
图4所示为图2的扭矩传递机构的主动件和连接装置的立体示意图;
图5所示为图2的扭矩传递机构的被动件和连接装置的立体示意图;
图6所示为应用于上述实施例中的一种内转子单相永磁无刷电机;
图7所示为图6的电机的启动电路图;
图8所示为应用于上述实施例中的外转子单相永磁无刷电机。
【具体实施方式】
参考图1至图5,本发明第一实施例提供的单相电机驱动组件包括单相电机10和扭矩传递机构30。
所述单相电机10为单相永磁直流无刷电机或单相永磁同步电机,包括输出轴12。
所述扭矩传递机构30包括受所述电机输出轴12驱动的主动件40、用于驱动负载单方向转动的被动件50和连接装置60。所述连接装置60包括弹性件62和减震材料64,所述弹性件62的一端68连接至主动件40,另一端69连接至被动件50,所述减震材料64涂覆或套设于弹性件62上或填充于弹性件62的空隙内以降低弹性件62产生的噪声。本实施例中,
本实施例中,所述主动件40和被动件50至少其中之一为带翻边的盘式,两者合围共同形成一容置空间,所述弹性件62为收容于所述容置空间内的蚊香型卷绕弹簧。优选地,所述弹簧62的轴向两侧与主动件40和被动件50的接触面之间分别设弹性垫片66,以减少弹簧62在容置空间内的轴向跳动从而降低噪音。
所述减震材料64可以是涂覆于弹性件62外表面的减震层,也可以是填充于弹簧圈与圈之间空隙内的减震泥或减震胶等,或直接套设于弹性件62上的减震套,或缠绕于弹性件62上的减震材料,或直接用减震材料制成弹簧等。
所述主动件40连接至电机的输出轴12且可随其同步旋转,具体地,所述主动件40设轴孔42,所述电机输出轴12穿过所述轴孔42,所述电机输出轴12与轴孔42之间可以紧配或两者通过其他紧固连接以传递扭矩。所述主动件40的朝向被动件的一侧设容置槽44,本实施例中,所述容置槽44沿周向延伸,所述弹性件62的一端68收容于所述容置槽44内。
本实施例中,所述被动件50的外边缘设环形翻边52,翻边内形成空腔可用于放置弹簧62,翻边52设容置槽54,所述弹簧62的另一端69收容于所述容置槽54内。所述被动件50的翻边52设开槽56,以降低被动件50的材料使用量。
当电机10工作时,所述弹簧62的一端68及主动件40随电机输出轴12一起旋转,弹簧62开始储能,当弹簧62储存的能量达到一定值后,弹簧62的另一端69带动被动件一起旋转,从而驱动与被动件连接的负载70一起转动。当负载70的转速与电机输出轴12的转速相同时,弹簧62将稳定在某种张紧状态。
当电机驱动转动惯量较大的负载时,为了解决电机启动初期输出力矩不足以带动负载从而启动失败的问题,实施本发明能够在电机启动初期使得负载70相对驱动轴12打滑,当电机输出转速扭矩达到一定值时,电机通过连接机构30带动负载70运动,从而使电机更容易驱动转动惯量较大的负载而使启动不至失败。并且使用本发明提供的电机驱动组件及其扭矩传递机构,不需要增加电机的尺寸,也减少了因为其他启动方式造成的功率损耗。而且,由于弹簧62上涂敷或包裹了减震材料,弹簧产生的噪音得到有效降低。
本实施例中,所述负载70可以是风机如排气扇、油烟机等,或水泵如洗衣机用的排水泵、循环泵等,所述扭矩传递机构30的被动件50驱动风机或水泵的风扇或叶轮旋转。
图6所示为应用于上述实施例中的一种单相永磁无刷电机10,该电机为内转子式。所述电机10包括定子13和转子14,定子13包括定子磁心如叠片铁心15(laminated stator core)和绕设于叠片铁心15上的绕组16,转子12包括转轴17和永久磁极18,永久磁极18外表面与定子叠片铁心15相对且在两者之间形成气隙,优选地,所述气隙为基本均匀的气隙,即永久磁极18外表面与定子叠片铁心15的内表面同轴,定子叠片铁心15设若干定子齿,齿面连成近似圆环,齿面圆环的内和/或外表面设若干定位槽19,定位槽19的设置使得转子12在定子绕组16不通电的情况下转子14停在偏离死点的位置(即永磁转子的极轴相对于定子的齿轴偏移一个角度),优选地,齿数与定位槽19个数正比于转子磁极数,定子齿与齿面圆环为一体,绕好线圈后再装于定子铁心外环中。所述电机还包括位置感应装置20(见图7)如霍尔传感器、光电感应器等,位置感应装置20用于感应转子的位置。
图7示出本发明的单相永磁无刷电机的驱动电路80的结构框图。在驱动电路80中,定子绕组16与交流电源81串联于两节点A、B之间。交流电源81较佳的可以是市电交流电源,具有例如50赫兹或60赫兹的固定频率,电流电压例如可以是110伏、220伏、230伏等。可控双向交流开关82与串联的定子绕组16和交流电源81并联于两节点A、B之间。可控双向交流开关82较佳的为三端双向晶闸管(TRIAC),其两个阳极分别连接两节点A和B。可以理解,可控双向交流开关82也可例如由反向并联的两个单向晶闸管实现,并设置对应的控制电路以按照预定方式控制这两个单向晶闸管。交流-直流转换电路84与开关81并联于两节点A、B之间。交流-直流转换电路83将两节点A、B之间的交流电转换为低压直流电。位置传感器20可由交流-直流转换电路83输出的低压直流电供电,用于检测同步电机10的永磁转子12的磁极位置,并输出相应信号。开关控制电路85与交流-直流转换电路83、位置传感器20和可控双向交流开关82连接,被配置为依据位置传感器20检测的转子磁极位置信息和从交流-直流转换电路83获取的交流电源81的极性信息,控制可控双向交流开关82以预定方式在正、负半波导通与截止状态之间切换,使定子绕组16在电机起动阶段仅沿着前述的固定起动方向拖动转子12旋转。本发明实施例中,当可控双向交流开关82导通时,两个节点A、B被短路,交流-直流转换电路83因无电流流过而不再耗电,因此能够较大幅度地提高电能利用效率。
图8所示为应用于上述实施例中的另一种形式的电机10,该电机10为外转子式,即转子14位于定子13外围,转子永久磁极与定子磁心之间形成不均匀气隙,优选地,对应每一磁极处的气隙关于该磁极的中心线对称且其径向宽度从转子磁极中心往磁极的两端逐渐增大。
对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,如电机可以是内转子式也可以是外转子式,定转子之间的气隙可以均匀也可以非均匀,永久磁极的材料可以是稀土材料也可以是铁氧体等其他材料类型,采用内转子形式时永久磁极可以直接固定至转子的转轴,也可以是转子磁心先固定至转轴,永久磁极再固定至转子磁心的外表面即磁极表贴式或插入转子磁心内即磁极内置式,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。
Claims (14)
1.一种单相电机驱动组件,包括单相电机以及扭矩传递机构,其特征在于,所述扭矩传递机构包括受所述电机驱动的主动件、用于驱动负载单方向转动的被动件和连接装置,所述连接装置包括弹性件和减震材料,所述弹性件的一端连接至主动件,另一端连接至被动件,所述减震材料涂覆或套设于弹性件上或填充于弹性件的间隙内或所述弹性件直接由减震材料制成以降低弹性件产生的噪声。
2.如权利要求1所述的单相电机驱动组件,其特征在于,所述单相电机为单相永磁直流无刷电机或单相永磁同步电机。
3.如权利要求1所述的单相电机驱动组件,其特征在于,所述主动件和被动件合围共同形成一容置空间,所述弹性件为收容于所述容置空间内的蚊香型卷绕弹簧。
4.如权利要求3所述的单相电机驱动组件,其特征在于,所述电机包括输出轴,所述主动件连接至电机的输出轴且可随其同步旋转,所述主动件设容置槽,所述弹性件的一端收容于所述容置槽内。
5.如权利要求3所述的单相电机驱动组件,其特征在于,所述被动件设容置槽,所述弹性件的一端收容于所述容置槽内。
6.如权利要求1至5任一项所述的单相电机驱动组件,其特征在于,所述单相电机还包括驱动电路,所述定子包括定子绕组,所述定子绕组与一外部交流电源串联于第一、第二节点之间,所述驱动电路包括可控双向交流开关、与所述双向交流开关并联于所述第一、第二节点之间的交流-直流转换电路、所述位置传感器及开关控制电路,所述交流-直流转换电路在所述可控双向交流开关导通时由于所述第一、第二节点被短路而无电流流过;所述开关控制电路被配置为依据所述位置传感器检测的转子磁极位置信息和所述外部交流电源的极性信息,控制所述可控双向交流开关以预定方式在正半波或负半波导通与截止状态之间切换,使所述定子绕组在电机启动阶段仅沿着预定的启动方向拖动所述转子转动。
7.如权利要求1至5任一项所述的单相电机驱动组件,其特征在于,所述转子包括若干永久磁极,所述定子包括定子磁心和绕设于定子磁心上的绕组,所述定子磁心包括若干定子齿,每一定子齿包括朝向转子永磁极的齿面,所述齿面基本与转子同轴,每一定子齿设定位槽以便转子的初始位置偏离死点位置。
8.如权利要求1至5任一项所述的单相电机驱动组件,其特征在于,所述电机为外转子式,所述转子包括若干永久磁极,所述定子包括定子磁心和绕设于定子磁心上的绕组,所述定子磁心包括若干定子齿,每一定子齿包括朝向转子永磁极的齿面,所述永久磁极与定子齿面之间形成非均匀气隙,对应每一磁极处的气隙关于该磁极的中心线对称。
9.如权利要求8所述的单相电机驱动组件,其特征在于,对应每一磁极处的气隙的径向宽度从磁极中心往磁极的两端逐渐增大。
10.一种扭矩传递机构,包括受外力驱动的主动件、用于驱动负载单方向转动的被动件和连接装置,所述连接装置包括弹性件和减震材料,所述弹性件的一端连接至主动件,另一端连接至被动件,所述减震材料涂覆或套设于弹性件上或填充于弹性件的间隙内以降低弹性件产生的噪声。
11.如权利要求10所述的扭矩传递机构,其特征在于,所述主动件和被动件合围共同形成一容置空间,所述弹性件为收容于所述容置空间内的蚊香型卷绕弹簧。
12.如权利要求11所述的扭矩传递机构,其特征在于,所述主动件设第一容置槽,所述弹性件的一端收容于所述第一容置槽内,所述被动件设第二容置槽,所述弹性件的另一端收容于所述第二容置槽内。
13.一种风机,包括风扇和驱动风扇运转的驱动组件,所述驱动组件为权利要求1至9任一项所述的单相电机驱动组件,所述风扇受所述扭矩传递机构的被动件驱动。
14.一种水泵,包括叶轮和驱动叶轮运转的驱动组件,所述驱动组件为权利要求1至9任一项所述的单相电机驱动组件,所述叶轮受所述扭矩传递机构的被动件驱动。
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