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公开(公告)号：US20180234034A1
公开(公告)日：2018-08-16
申请号：US15431850
申请日：2017-02-14
申请人： Black & Decker Inc.
发明人： Alexander MANASSEH , Mark T. CHERRY , Wing W. LIN , Samuel G. WOODS , Scott J. ESHLEMAN , Tal GOTTESMAN , Timothy J. SEELEY
摘要： A power tool is provided, including a housing; a brushless DC (BLDC) motor arranged within the housing, the motor including a stator and a rotor rotatably disposed within the stator; a power module electrically disposed between the motor and a power supply, the power module including power switches; an actuator engageable by a user; and a control module configured to control a switching operation of the power switches to begin supply power to the motor when the actuator is engaged. The control module monitors engagement and disengagement events of the actuator, and ignores a subsequent engagement of the actuator if at least one of number of actuator engagement events and/or number of actuator disengagement events exceeds a predetermined threshold value within a predetermined time.
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22.发明授权公开(公告)号：US10023152B2
公开(公告)日：2018-07-17
申请号：US15197063
申请日：2016-06-29
摘要： A method of preventing a windshield wiper from freezing to a windshield of a vehicle is provided. The method broadly includes the steps of: (a) receiving information relating to an ambient condition of the vehicle; (b) switching power to a motor for driving the windshield wiper in a first direction if the received information indicates an adverse ambient condition of the vehicle; (c) sensing current drawn by the motor; (d) comparing an initial sensed current drawn by the motor when power is initially switched to the motor to a subsequent sensed current drawn by the motor a period after power is initially switched to the motor; and (e) periodically reversing the motor for driving the windshield wiper in a second direction or the first direction until the subsequent sensed current is less than the initial sensed current.
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公开(公告)号：US10003297B2
公开(公告)日：2018-06-19
申请号：US15260632
申请日：2016-09-09
发明人： Shen Wang
CPC分类号： H02P29/40 , H02P6/08 , H02P6/14 , H02P27/08 , H02P29/027
摘要： According to embodiments, a drive circuit includes a control portion configured to, when a duty ratio is set to a first predetermined value, and a load apparatus is in an overload state, set the duty ratio to a second predetermined value smaller than the first predetermined value during a predetermined time period.
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24.发明授权公开(公告)号：US09991826B2
公开(公告)日：2018-06-05
申请号：US15634299
申请日：2017-06-27
申请人： Minebea Mitsumi Inc.
发明人： Keiichi Katayama
CPC分类号： H02P6/08 , H02P6/17 , H02P6/24 , H02P29/0241
摘要： A motor control circuit comprising a speed control circuit configured to output speed command information relating to the rotational speed of a motor based on target information relating to a target rotational speed and rotational speed detection information of the rotational speed of the motor, a drive stop control circuit configured to output a first drive stop control signal for performing braking control of the motor or a second drive stop control signal for performing free-run stop control of the motor based on the rotational speed detection information and the speed command information when input of the target information is stopped, and a drive signal generation circuit configured to generate a drive control signal for driving the motor based on the first drive stop control signal or the second drive stop control signal when the first drive stop control signal or the second drive stop control signal is output.
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公开(公告)号：US09948230B2
公开(公告)日：2018-04-17
申请号：US15538944
申请日：2015-12-08
发明人： Pierre Chassard , Pierre Tisserand , Jean-Francois Gautru , Nathalie Canitrot , Jean-Marc Dubus , Thomas Vera , Pierre Faverolle , Gregory Godefroy
CPC分类号： H02P29/68 , H02P9/305 , H02P9/48 , H02P29/032 , H02P29/664
摘要： The invention relates to a device for controlling an alternator of the type that controls a DC voltage (B+A) generated by the alternator (11) according to a predetermined set voltage (U0) by monitoring the intensity of an energizing current (IEXC) flowing through an energizing circuit of the alternator. According to the invention, the device includes a voltage-control loop (7) and a temperature-control loop (17) which comprises a temperature sensor supplying a current temperature (T) of components of the alternator, a subtracter (19) supplying a temperature error (ϵt) between the current temperature (T) and a maximum acceptable temperature (Tmax) and a control module (20) supplying a maximum admissible energizing percentage (rmax) in accordance with the temperature error according to a predetermined control law.
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公开(公告)号：US09944482B2
公开(公告)日：2018-04-17
申请号：US15198154
申请日：2016-06-30
CPC分类号： B65H7/20 , B65H5/062 , B65H2403/92 , B65H2513/512 , B65H2515/702 , B65H2515/704 , B65H2801/06 , G03G15/5004 , H02P3/025 , B65H2220/01 , B65H2220/03 , B65H2220/02
摘要： A motor control device includes: an electric-current detection unit configured to detect an electric current that flows through a motor at a time when the motor is not to be driven; a voltage-polarity determining unit configured to determine polarity of a voltage corresponding to the detected electric current; and an operating-state management unit configured to perform control of stopping the motor depending on the polarity of the voltage.
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公开(公告)号：US09932067B2
公开(公告)日：2018-04-03
申请号：US15504723
申请日：2014-09-17
申请人： NSK LTD.
发明人： Kyosho Uryu , Shin Kumagai
CPC分类号： B62D5/0484 , B62D5/0463 , B62D5/0487 , B62D5/049 , H02P6/085 , H02P6/12 , H02P6/16
摘要： An electric power steering apparatus that calculates a current command value based on at least a steering torque, performs a PWM-control of a brushless motor by an inverter based on the current command value, performs a current control by detecting a rotational angle of the brushless motor, and performs an assist-control of a steering system. The apparatus includes three rotational angle detecting systems to detect three rotational angles of the brushless motor; and an angle diagnosing section that compares absolute values of differences on respective angles outputted from the three rotational angle detecting systems with a threshold, and performs a process by diagnosing whether the rotational angle detecting systems are normal or abnormal; wherein the assist control is continuously performed by using output angles outputted from systems diagnosed as being normal.
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公开(公告)号：US09929681B2
公开(公告)日：2018-03-27
申请号：US14411961
申请日：2014-02-20
发明人： Zhao Yong , Chen Yunshen
摘要： Systems and methods associated with an HVAC system and a multi-functional ECM motor for use in the HVAC system are disclosed. The motor controller of the ECM motor includes a microprocessor, a tap detection circuit and a power source portion. The tap detection circuit is coupled to several tap input lines. The motor also includes first and second AC input wires, a common wire, a ground wire, a first jumper wire and a second jumper wire. Each tap input line is coupled to the first input terminal of one current sensing unit. The first jumper wire is coupled to the second AC input wire, and the second jumper wire is coupled to the common wire. By coupling different wires of the ECM motor differently when replacing a PSC motor than when replacing ECM motors, the ECM motor is configured to replace PSC motors and ECM motors in HVAC systems.
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公开(公告)号：US09887660B2
公开(公告)日：2018-02-06
申请号：US14803307
申请日：2015-07-20
申请人： FANUC CORPORATION
发明人： Shoutarou Hashimoto , Tadashi Okita
CPC分类号： H02P29/025 , H02P3/14 , H02P3/18
摘要： A motor control device of the present invention is a control device for a motor for driving a feed shaft of a machine tool, and includes: a power outage detector for detecting a power outage of a power source for supplying power to drive the motor; a forcible decelerator for forcibly decelerating the motor in response to a torque command when a power outage is detected; a DC link voltage monitor for monitoring a DC link voltage applied to an amplifier for driving the motor; a determination unit for determining whether the value of the DC link voltage is greater than a first threshold, or whether the change ratio of the DC link voltage is greater than a second threshold; and, a torque command limiter for limiting the torque command to a predetermined torque command limiting value, in accordance with the result of determination at the determination unit.
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公开(公告)号：US09871367B2
公开(公告)日：2018-01-16
申请号：US15382768
申请日：2016-12-19
CPC分类号： H02H3/066 , H02H3/087 , H02H3/093 , H02H3/0935 , H02H3/16 , H02H3/202 , H02H3/207 , H02H3/243 , H02H3/247 , H02H5/041 , H02H7/1213
摘要： An overcurrent protection circuit includes a load drive portion that drives a load based on a power supply voltage; a wire that connects the load and the load drive portion; a current detection portion that detects a load current showing a value of a current flowing through the load; a voltage detection portion; and a controller that controls the load drive portion to control a drive of the load, the controller determining an addition-and-subtraction value, controlling the load drive portion to cut off the load current, and stopping driving the load to protect a protection target from an overcurrent. The controller subtracts the integration value based on an elapsed time after cutoff of the load current. The controller controls the load drive portion to again start to drive the load, and also calculates a post-correction integration value lower than a pre-correction integration value by correcting the pre-correction integration value.
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