公开(公告)号：US12103201B2

公开(公告)日：2024-10-01

申请号：US18032260

申请日：2021-09-13

申请人： HUSQVARNA AB

发明人： Magnus Rosén ,  Victor Johansson ,  David Dufke ,  Johan Berg

IPC分类号： B28D7/00 ,  B25F5/00 ,  B28D1/04 ,  H02H7/085 ,  H02K7/14 ,  H02P3/22 ,  H02P6/182 ,  H02P21/14 ,  B27G19/04

CPC分类号： B28D7/005 ,  B25F5/00 ,  B28D1/04 ,  H02H7/0854 ,  H02K7/145 ,  H02P3/22 ,  H02P6/182 ,  H02P21/143 ,  B27G19/04

摘要： A hand-held electrically powered cut-off tool (100) for cutting concrete and stone by a rotatable cutting disc (105), the cut-off tool (100) comprising an electric motor (130) arranged to be controlled by a control unit (110) via a motor control interface (120), wherein the control unit (110) is arranged to obtain data indicative of an angular velocity of the cutting disc (105), and to detect a kickback condition based on a decrease in angular velocity, and wherein the control unit (110) is arranged to electromagnetically brake the electric motor (130) in response to detecting a kickback condition.

公开(公告)号：US20180115149A1

公开(公告)日：2018-04-26

申请号：US15513791

申请日：2015-09-23

申请人： Bombardier Transportation GmbH

发明人： Gerhard Isepponi

IPC分类号： H02H3/44 ,  H02H3/027 ,  H02H7/085

CPC分类号： H02H3/44 ,  H02H3/027 ,  H02H7/08 ,  H02H7/0854 ,  H02H7/0857 ,  H02H7/0858 ,  H02H7/122 ,  H02H7/1227 ,  H02H7/26

摘要： The invention relates to a device and to a method for monitoring an electrical network in a rail vehicle. The electrical network includes at least one converter, at least one drive motor, at least one first phase line for electrical connection of the at least one converter and the at least one drive motor. A magnitude of a current change of a first phase current is determined. A network error in a partial network on the machine side is detected if at least one criterion based on the current change is met. The criterion based on a current change is met when the magnitude of the current change of the first phase current is greater than a predetermined current change threshold.

公开(公告)号：US09618583B2

公开(公告)日：2017-04-11

申请号：US14642956

申请日：2015-03-10

申请人： Mitsubishi Electric Research Laboratories, Inc.

发明人： Dehong Liu

IPC分类号： G01R31/06 ,  G01R31/34 ,  H02H3/08 ,  H02H3/46 ,  H02H3/52 ,  H02H7/08 ,  H02H7/085 ,  G01R31/02

CPC分类号： G01R31/346 ,  G01R31/024 ,  H02H3/08 ,  H02H3/46 ,  H02H3/52 ,  H02H7/08 ,  H02H7/0833 ,  H02H7/0854

摘要： A method detects faults during a steady state of an operation of an induction motor. The method measures, in a time domain, a signal of a current powering the induction motor with a fundamental frequency and determines, in a frequency domain, a set of frequencies with non-zero amplitudes, such that a reconstructed signal formed by the set of frequencies with non-zero amplitudes approximates the signal measured in the time domain. The determining includes a compressive sensing via searching within a subband including the fundamental frequency of the signal subject to condition of a sparsity of the signal in the frequency domain. The method detects a fault in the induction motor if the set of frequencies includes a fault frequency different from the fundamental frequency.

公开(公告)号：US08786220B2

公开(公告)日：2014-07-22

申请号：US12810639

申请日：2008-10-31

申请人： Ulrich Single ,  Michael Habele

发明人： Ulrich Single ,  Michael Habele

IPC分类号： H02P1/24

CPC分类号： H02H7/0854 ,  B25F5/00

摘要： The invention relates to a device (10) for taking a safety precaution in an electrical tool, said electrical tool comprising an electric motor (EM) with at least one field winding and an armature winding. The device (10) comprises the following features: a sensor unit (12) which is designed to generate a sensor signal (21) in accordance with a motor current (14) passing through the electric motor (EM), an armature voltage (16) via the armature winding, a voltage (18) via the field winding and/or a commutation frequency (20) in the armature winding; a unit (22) detecting a change of the sensor signal, which is designed to detect a temporal change of the sensor signal (21) and emit a corresponding modification signal (24) on the basis of the detected change; and a safety device (26) which is designed to take a safety precaution (28) in the electrical tool when a value of the modification signal (24) is exceeded or not met in relation to a threshold value.

摘要翻译： 本发明涉及一种用于在电动工具中采取安全预防措施的装置（10），所述电动工具包括具有至少一个励磁绕组和电枢绕组的电动机（EM）。 装置（10）包括以下特征：传感器单元（12），其被设计成根据通过电动机（EM）的电机电流（14）产生传感器信号（21），电枢电压（16 ）经由所述电枢绕组，经由所述励磁绕组的电压（18）和/或所述电枢绕组中的换向频率（20）; 检测传感器信号的变化的单元（22），其被设计为基于检测到的变化来检测传感器信号（21）的时间变化并发出相应的修改信号（24）; 以及安全装置（26），其被设计为当相对于阈值超过或不满足修改信号（24）的值时，在电动工具中采取安全预防措施（28）。

公开(公告)号：US07681659B2

公开(公告)日：2010-03-23

申请号：US12008823

申请日：2008-01-14

申请人： Qiang Zhang ,  Uday Deshpande ,  John Charles Vanko ,  Jason Lee ,  Craig Schell ,  Thomas Jay Bodine ,  Joao Norona ,  David Beers

发明人： Qiang Zhang ,  Uday Deshpande ,  John Charles Vanko ,  Jason Lee ,  Craig Schell ,  Thomas Jay Bodine ,  Joao Norona ,  David Beers

IPC分类号： B23Q15/00

CPC分类号： B25F5/001 ,  B23D59/001 ,  B25B21/00 ,  B25F5/00 ,  H02H7/0854 ,  H02P29/032

摘要： A control system is provided for use in a power tool. The control system includes: a rotational rate sensor having a resonating mass and a controller electrically connected to the rotational rate sensor. The rotational rate sensor detects lateral displacement of the resonating mass and generates a signal indicative of the detected lateral displacement, such that the lateral displacement is directly proportional to a rotational speed at which the power tool rotates about an axis of the rotary shaft. Based on the generated signal, the controller initiates a protective operation to avoid further undesirable rotation of the power tool. The controller may opt to reduce the torque applied to shaft to a non-zero value that enables the operator to regain control of the tool.

摘要翻译： 提供一种用于电动工具的控制系统。 控制系统包括：具有谐振质量的旋转速率传感器和与旋转速率传感器电连接的控制器。 旋转速率传感器检测共振体的横向位移并产生表示检测到的横向位移的信号，使得横向位移与动力工具围绕旋转轴的轴线旋转的转速成正比。 基于产生的信号，控制器启动保护操作以避免电动工具的进一步不希望的旋转。 控制器可以选择将施加到轴上的扭矩减小到非零值，使得操作者能够重新获得对工具的控制。

公开(公告)号：US07372226B2

公开(公告)日：2008-05-13

申请号：US10557936

申请日：2004-11-30

申请人： Juergen Wiker ,  Dietmar Hahn ,  Mario Pauli ,  Roland Walter ,  Andreas Heilmann

发明人： Juergen Wiker ,  Dietmar Hahn ,  Mario Pauli ,  Roland Walter ,  Andreas Heilmann

IPC分类号： H02P3/00

CPC分类号： B23Q11/04 ,  B23Q11/0092 ,  H02H7/0854

摘要： In a method for shutting off a drive motor (12) of a power tool that drives a tool, the drive motor (12) is shut off as a function of a variable threshold value (E1) if the tool jams. The threshold value (E1) is determined in at least one predetermined time interval (T1) as a function of a current load speed (n1) and a no-load speed (n0).

摘要翻译： 在用于关闭驱动工具的电动工具的驱动马达（12）的方法中，驱动马达（12）作为可变阈值（E 1> 1）的函数被切断，如果 工具卡住 作为当前负载速度（n <1> 1）的函数，在至少一个预定时间间隔（T 1> 1）中确定阈值（E 1> 1） SUB>）和空载速度（n <0> 0）。

公开(公告)号：US06404158B1

公开(公告)日：2002-06-11

申请号：US09562986

申请日：2000-05-01

申请人： Mario Boisvert ,  Randall Perrin

发明人： Mario Boisvert ,  Randall Perrin

IPC分类号： G05D300

CPC分类号： B60J7/0573 ,  H02H3/006 ,  H02H3/44 ,  H02H7/0851 ,  H02H7/0854

摘要： Disclosed is an improved system and method for sensing both hard and soft obstructions for a movable panel such as a sunroof. A dual detection scheme is employing that includes an optical sensing as the primary means and electronic sensing of motor current as a secondary means. The secondary means utilizes system empirical precharacterization, fast processing algorithms, motor parameter monitoring including both current sensing and sensorless electronic motor current commutation pulse sensing, and controller memory, to adaptively modify electronic obstacle detection thresholds in real time without the use of templates and cycle averaging techniques.

公开(公告)号：US5483133A

公开(公告)日：1996-01-09

申请号：US217654

申请日：1994-03-25

申请人： Yasuhiro Takabe ,  Koji Ueda ,  Toshihiro Hara

发明人： Yasuhiro Takabe ,  Koji Ueda ,  Toshihiro Hara

IPC分类号： B60J1/00 ,  E05F15/10 ,  F16P3/12 ,  H02H7/085 ,  G05B5/00

CPC分类号： F16P3/12 ,  H02H7/0851 ,  H02H7/0854

摘要： A control system for opening or closing an opening-closing member when a foreign material is caught by the opening-closing member. The event that the opening-closing member catches the foreign material is decided on the basis of a driving state of a motor for driving the opening-closing member such as a power window. For example, the event that the event of catching the foreign material is decided when a driving acceleration or a driving velocity is less than a predetermined threshold X or Y, respectively. Each of the thresholds X and Y is set basically on the basis of the previous driving acceleration and velocity of the opening-closing member. The thresholds X and Y are corrected on the basis of a condition exerting an influence upon the driving state of the motor, for example, on the basis of a driving voltage or a resistance to a sliding movement of the opening-closing member.

摘要翻译： 一种控制系统，用于当异物被开闭构件卡住时，打开或关闭开闭构件。 基于用于驱动诸如电动窗的开闭构件的电动机的驱动状态来决定打开 - 关闭构件捕获异物的事件。 例如，当驾驶加速度或驾驶速度分别小于预定阈值X或Y时，决定捕获异物的事件的事件。 基本上基于开闭构件的先前的驾驶加速度和速度来设定阈值X和Y中的每一个。 基于对电动机的驱动状态的影响的条件，例如基于驱动电压或对开闭部件的滑动运动的抵抗力来校正阈值X和Y。

公开(公告)号：US4940391A

公开(公告)日：1990-07-10

申请号：US268102

申请日：1988-11-07

申请人： Robert T. Elms ,  Clyde O. Peterson ,  Gary F. Saletta

发明人： Robert T. Elms ,  Clyde O. Peterson ,  Gary F. Saletta

IPC分类号： G01R31/00 ,  F04D27/02 ,  H02H7/085 ,  H02P23/00

CPC分类号： H02H7/0854 ,  F04D25/06 ,  F04D27/001

摘要： In a compressor system, surge detection is provided by sensing the current of the motor driving the compressor and reading oscillations of the current about the average thereof and above and below two opposite threshold levels from such average current and counting the polarity changes within a time interval containing so many samples of the current and defining a sliding window.

公开(公告)号：US4307325A

公开(公告)日：1981-12-22

申请号：US133463

申请日：1980-03-24

申请人： David A. Saar

发明人： David A. Saar

IPC分类号： H02P29/00 ,  B23B45/00 ,  B23B45/02 ,  H02H6/00 ,  H02H7/085 ,  H02H7/093 ,  H02P23/00 ,  H02P25/10 ,  H02P25/14 ,  H02P5/16

CPC分类号： B23B45/02 ,  H02H6/005 ,  H02H7/0854 ,  H02P23/0077 ,  H02P25/145 ,  B23B2260/128 ,  Y10S388/907 ,  Y10S388/934 ,  Y10S388/937

摘要： A digital control system for electric motors in power tools of the portable or stationary type includes a microcomputer controlled speed regulator connected to the electric motor for maintaining a preselected speed of the motor substantially constant between no load and full load operation of the motor. The preselected speed is inputted to the microcomputer by means of a rotary switch or similar input switching arrangement. When the tool is just starting or the operator changes the speed switch, the microcomputer controls the speed of the motor to slowly approach the desired speed. The microcomputer is programmed to detect an overload condition and activate an alarm, and an impending kickback condition and stop the electric motor.

摘要翻译： 用于便携式或固定式电动工具中的电动机的数字控制系统包括连接到电动机的微型计算机控制的速度调节器，用于在马达的无负载和满载操作之间保持马达的预选速度基本恒定。 预选速度通过旋转开关或类似的输入开关装置输入到微型计算机。 当工具正在启动或操作员更换速度开关时，微机控制电机的速度慢慢地达到所需的速度。 微型计算机被编程为检测过载状况并激活报警，以及即将的反冲条件并停止电动机。