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公开(公告)号：US20100307782A1
公开(公告)日：2010-12-09
申请号：US12867239
申请日：2009-02-16
CPC分类号： B25F5/00 , H02H7/0854 , H02P29/0241
摘要： A current detection circuit (18) detects that a drive current of the stator coil (2d) is exceeding a threshold value Ir. A rotation number detection circuit (17) detects that the number of rotations of a rotor (2a) is lower than a threshold value Nr. A computing part (20) outputs a PWM signal which switches a semiconductor switching element (3a) of the inverter circuit part (3). The computing part (20) changes the threshold values Ir and Nr in accordance with the PWM duty of the PWM signal determined in accordance with a pressed distance of a switch trigger (7) and detects a locked state of the motor (2) on the conditions that the motor current I is exceeding the set threshold value Ir and that the number of rotations N thereof is lower than the threshold value Nr.
摘要翻译： 电流检测电路（18）检测出定子线圈（2d）的驱动电流超过阈值Ir。 旋转数检测电路（17）检测转子（2a）的转数低于阈值Nr。 计算部件（20）输出切换逆变器电路部（3）的半导体开关元件（3a）的PWM信号。 计算部件（20）根据根据开关触发器（7）的按压距离确定的PWM信号的PWM占空比来改变阈值Ir和Nr，并检测电动机（2）的锁定状态 电动机电流I超过设定阈值Ir并且其转数N低于阈值Nr的条件。
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公开(公告)号：US09114519B2
公开(公告)日：2015-08-25
申请号：US12867239
申请日：2009-02-16
CPC分类号： B25F5/00 , H02H7/0854 , H02P29/0241
摘要： A current detection circuit (18) detects that a drive current of the stator coil (2d) is exceeding a threshold value Ir. A rotation number detection circuit (17) detects that the number of rotations of a rotor (2a) is lower than a threshold value Nr. A computing part (20) outputs a PWM signal which switches a semiconductor switching element (3a) of the inverter circuit part (3). The computing part (20) changes the threshold values Ir and Nr in accordance with the PWM duty of the PWM signal determined in accordance with a pressed distance of a switch trigger (7) and detects a locked state of the motor (2) on the conditions that the motor current I is exceeding the set threshold value Ir and that the number of rotations N thereof is lower than the threshold value Nr.
摘要翻译： 电流检测电路（18）检测出定子线圈（2d）的驱动电流超过阈值Ir。 旋转数检测电路（17）检测转子（2a）的转数低于阈值Nr。 计算部件（20）输出切换逆变器电路部（3）的半导体开关元件（3a）的PWM信号。 计算部件（20）根据根据开关触发器（7）的按压距离确定的PWM信号的PWM占空比来改变阈值Ir和Nr，并检测电动机（2）的锁定状态 电动机电流I超过设定阈值Ir并且其转数N低于阈值Nr的条件。
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公开(公告)号：US08541913B2
公开(公告)日：2013-09-24
申请号：US13446355
申请日：2012-04-13
IPC分类号： H02K7/14
CPC分类号： H02K7/145 , B25F5/02 , H02K5/20 , H02K9/06 , H02K2211/03
摘要： A power tool includes a housing, a brushless motor, and a cover member. The housing has an air intake hole and an air exhaust hole formed therein, the housing having an inner surface. The brushless motor has an outer surface disposed in the housing, a first endface near the air intake hole, and a second endface near the air exhaust hole. The cover member covers at least one of the first endface and the second endface for preventing dust from entering the brushless motor. The inner surface of the housing and outer surface of the brushless motor define a circulation path providing communication between the air intake hole and the air exhaust hole.
摘要翻译： 电动工具包括壳体，无刷电动机和盖构件。 壳体具有形成在其中的进气孔和排气孔，壳体具有内表面。 无刷电动机具有设置在壳体中的外表面，靠近进气孔的第一端面和靠近排气孔的第二端面。 盖构件覆盖第一端面和第二端面中的至少一个，用于防止灰尘进入无刷电动机。 壳体的内表面和无刷电动机的外表面限定了提供进气孔和排气孔之间的连通的循环路径。
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公开(公告)号：US08253285B2
公开(公告)日：2012-08-28
申请号：US12104590
申请日：2008-04-17
IPC分类号： H02K7/14
CPC分类号： H02K7/145 , B25F5/02 , H02K5/20 , H02K9/06 , H02K2211/03
摘要： A power tool includes a housing, a brushless motor, and a cover member. The housing has an air intake hole and an air exhaust hole formed therein, the housing having an inner surface. The brushless motor has an outer surface disposed in the housing, a first endface near the air intake hole, and a second endface near the air exhaust hole. The cover member covers at least one of the first endface and the second endface for preventing dust from entering the brushless motor. The inner surface of the housing and outer surface of the brushless motor define a circulation path providing communication between the air intake hole and the air exhaust hole.
摘要翻译： 电动工具包括壳体，无刷电动机和盖构件。 壳体具有形成在其中的进气孔和排气孔，壳体具有内表面。 无刷电动机具有设置在壳体中的外表面，靠近进气孔的第一端面和靠近排气孔的第二端面。 盖构件覆盖第一端面和第二端面中的至少一个，用于防止灰尘进入无刷电动机。 壳体的内表面和无刷电动机的外表面限定了提供进气孔和排气孔之间的连通的循环路径。
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公开(公告)号：US08084901B2
公开(公告)日：2011-12-27
申请号：US12530200
申请日：2008-06-17
IPC分类号： H02K7/14
摘要： According to an aspect of the present invention, there is provided a power tool including: a housing having a suction port formed thereon to introduce an cooling air from an outside of the housing; and a brushless motor that is housed in the housing and has an electric circuit, the electric circuit having a heat radiating surface, wherein the heat radiating surface is disposed in a neighborhood of the suction port.
摘要翻译： 根据本发明的一个方面，提供了一种动力工具，包括：壳体，其上形成有用于从壳体的外部引入冷却空气的吸入口; 以及容纳在所述壳体中并具有电路的无刷电动机，所述电路具有散热面，所述散热面配置在所述吸入口附近。
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公开(公告)号：US20080265695A1
公开(公告)日：2008-10-30
申请号：US12104590
申请日：2008-04-17
IPC分类号： H02K7/14
CPC分类号： H02K7/145 , B25F5/02 , H02K5/20 , H02K9/06 , H02K2211/03
摘要： A power tool includes a housing, a brushless motor, and a cover member. The housing has an air intake hole and an air exhaust hole formed therein, the housing having an inner surface. The brushless motor has an outer surface disposed in the housing, a first endface near the air intake hole, and a second endface near the air exhaust hole. The cover member covers at least one of the first endface and the second endface for preventing dust from entering the brushless motor. The inner surface of the housing and outer surface of the brushless motor define a circulation path providing communication between the air intake hole and the air exhaust hole.
摘要翻译： 电动工具包括壳体，无刷电动机和盖构件。 壳体具有形成在其中的进气孔和排气孔，壳体具有内表面。 无刷电动机具有设置在壳体中的外表面，靠近进气孔的第一端面和靠近排气孔的第二端面。 盖构件覆盖第一端面和第二端面中的至少一个，用于防止灰尘进入无刷电动机。 壳体的内表面和无刷电动机的外表面限定了提供进气孔和排气孔之间的连通的循环路径。
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公开(公告)号：US07330006B2
公开(公告)日：2008-02-12
申请号：US11406373
申请日：2006-04-19
申请人： Kazutaka Iwata , Shinichi Sakamoto , Tomoyoshi Yokota , Kenichirou Yoshida , Tomomasa Nishikawa , Atsushi Nakagawa
发明人： Kazutaka Iwata , Shinichi Sakamoto , Tomoyoshi Yokota , Kenichirou Yoshida , Tomomasa Nishikawa , Atsushi Nakagawa
IPC分类号： H02P1/18
CPC分类号： B25F5/008 , H02K7/145 , H02K9/06 , H02K11/33 , Y10S388/937
摘要： A power tool includes a brushless motor, a cooling fan, and a driving unit in a housing. The brushless motor is provided in the housing and having a rotary shaft. The cooling fan is attached to the rotary shaft in the housing, and rotatable together with the rotary shaft. The driving unit is provided in the housing for driving the motor. The driving unit includes an inverter circuit having a circuit board and a plurality of switching elements mounted on the circuit board. The circuit board is positioned on an opposite side to the motor with respect to the cooling fan. The plurality of switching elements is positioned around the cooling fan in a circumferential direction about the rotary shaft.
摘要翻译： 电动工具包括无刷电动机，冷却风扇和壳体中的驱动单元。 无刷电动机设置在壳体中并且具有旋转轴。 冷却风扇安装在壳体中的旋转轴上，并与旋转轴一起旋转。 驱动单元设置在壳体中用于驱动马达。 驱动单元包括具有电路板和安装在电路板上的多个开关元件的逆变器电路。 电路板相对于冷却风扇位于电动机的相对侧。 多个开关元件围绕冷却风扇围绕旋转轴在周向上定位。
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公开(公告)号：US20060255756A1
公开(公告)日：2006-11-16
申请号：US11406373
申请日：2006-04-19
申请人： Kazutaka Iwata , Shinichi Sakamoto , Tomoyoshi Yokota , Kenichirou Yoshida , Tomomasa Nishikawa , Atsushi Nakagawa
发明人： Kazutaka Iwata , Shinichi Sakamoto , Tomoyoshi Yokota , Kenichirou Yoshida , Tomomasa Nishikawa , Atsushi Nakagawa
IPC分类号： H02P1/18
CPC分类号： B25F5/008 , H02K7/145 , H02K9/06 , H02K11/33 , Y10S388/937
摘要： A power tool includes a brushless motor, a cooling fan, and a driving unit in a housing. The brushless motor is provided in the housing and having a rotary shaft. The cooling fan is attached to the rotary shaft in the housing, and rotatable together with the rotary shaft. The driving unit is provided in the housing for driving the motor. The driving unit includes an inverter circuit having a circuit board and a plurality of switching elements mounted on the circuit board. The circuit board is positioned on an opposite side to the motor with respect to the cooling fan. The plurality of switching elements is positioned around the cooling fan in a circumferential direction about the rotary shaft.
摘要翻译： 电动工具包括无刷电动机，冷却风扇和壳体中的驱动单元。 无刷电动机设置在壳体中并且具有旋转轴。 冷却风扇安装在壳体中的旋转轴上，并与旋转轴一起旋转。 驱动单元设置在壳体中用于驱动马达。 驱动单元包括具有电路板和安装在电路板上的多个开关元件的逆变器电路。 电路板相对于冷却风扇位于电动机的相对侧。 多个开关元件围绕冷却风扇围绕旋转轴在周向上定位。
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公开(公告)号：US20120200181A1
公开(公告)日：2012-08-09
申请号：US13446355
申请日：2012-04-13
IPC分类号： H02K7/14
CPC分类号： H02K7/145 , B25F5/02 , H02K5/20 , H02K9/06 , H02K2211/03
摘要： A power tool includes a housing, a brushless motor, and a cover member. The housing has an air intake hole and an air exhaust hole formed therein, the housing having an inner surface. The brushless motor has an outer surface disposed in the housing, a first endface near the air intake hole, and a second endface near the air exhaust hole. The cover member covers at least one of the first endface and the second endface for preventing dust from entering the brushless motor. The inner surface of the housing and outer surface of the brushless motor define a circulation path providing communication between the air intake hole and the air exhaust hole.
摘要翻译： 电动工具包括壳体，无刷电动机和盖构件。 壳体具有形成在其中的进气孔和排气孔，壳体具有内表面。 无刷电动机具有设置在壳体中的外表面，靠近进气孔的第一端面和靠近排气孔的第二端面。 盖构件覆盖第一端面和第二端面中的至少一个，用于防止灰尘进入无刷电动机。 壳体的内表面和无刷电动机的外表面限定了提供进气孔和排气孔之间的连通的循环路径。
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公开(公告)号：US20100244592A1
公开(公告)日：2010-09-30
申请号：US12530200
申请日：2008-06-17
摘要： According to an aspect of the present invention, there is provided a power tool including: a housing having a suction port formed thereon to introduce an cooling air from an outside of the housing; and a brushless motor that is housed in the housing and has an electric circuit, the electric circuit having a heat radiating surface, wherein the heat radiating surface is disposed in a neighborhood of the suction port.
摘要翻译： 根据本发明的一个方面，提供了一种动力工具，包括：壳体，其上形成有用于从壳体的外部引入冷却空气的吸入口; 以及容纳在所述壳体中并具有电路的无刷电动机，所述电路具有散热面，所述散热面配置在所述吸入口附近。
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