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公开(公告)号：US12013678B2
公开(公告)日：2024-06-18
申请号：US17758871
申请日：2021-01-15
IPC分类号： G05B19/404 , H02P8/00
CPC分类号： G05B19/404 , H02P8/00 , G05B2219/41078 , G05B2219/41209
摘要： A method for backlash compensation in motion control systems includes homing a payload of a motion control system, and performing a tooth-pitch non-uniformity procedure on the motion control system to identify a non-uniformity correction. A backlash lookup table is generated for use in backlash correction during normal operation of the motion control system. The backlash lookup table is generated using a training process that includes selecting a move sequence for operating the motion control system, and executing the move sequence with the non-uniformity correction. The training process further includes computing a backlash measurement describing backlash of one or more components of the motion control system during the move sequence, and storing the backlash measurement in the backlash lookup table.
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公开(公告)号：US11990858B2
公开(公告)日：2024-05-21
申请号：US17903025
申请日：2022-09-05
发明人： Bernhard Dwersteg
CPC分类号： H02P8/32
摘要： A method and a circuit arrangement for damping stepper motor resonances during operation of a stepper motor (M), in particular in the medium und high speed range, is described, wherein the coils (A; B) of the stepper motor (M) are each connected into a bridge circuit (Br1; Br2) comprising semiconductor switches (Sw1, . . . Sw4), in order to impress into the coils (A; B) a predetermined target coil current (ISollA; ISollB). The resonance damping is essentially achieved by activating a passive FD-phase in the zero crossing of the target coil current (ISollA; ISollB), during which all 10 semiconductor switches (Sw1, . . . Sw4) are opened or switched blocking, in order to thereby feed a coil current flowing in the related motor coil (A; B) back into the supply voltage source either via inverse or body diodes and/or via diodes (D1, . . . D4) connected in parallel to the semiconductor switches (Sw1, . . . Sw4) in the reverse direction between the positive supply voltage (+VM) and ground potential.
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公开(公告)号：US11750135B2
公开(公告)日：2023-09-05
申请号：US17841665
申请日：2022-06-16
发明人： Yasuhiro Shirai
摘要： One aspect of a motor control device according to the present invention is a motor control device that controls a motor of an electric pump. The motor control device includes a drive unit that supplies a drive current to the motor; a control unit that controls a rotation speed of the motor by controlling the drive unit based on a rotation speed command value; and a current detection unit that detects the drive current supplied to the motor, and supplies a current detection value indicating a detection result of the drive current to the control unit. The control unit determines whether or not a foreign fluid suction abnormality occurs in the electric pump, based on a first current detection value acquired at a first timing when the rotation speed command value changes from a first command value to a second command value and a second current detection value acquired after the first timing.
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公开(公告)号：US11736048B1
公开(公告)日：2023-08-22
申请号：US17719944
申请日：2022-04-13
发明人： Prerit Pramod
CPC分类号： H02P21/08 , B62D5/046 , B62D5/0409 , H02P21/22 , H02P25/22 , H02P2207/05
摘要： A method of controlling a dual-wound synchronous machine includes: determining positive and negative virtual half-motor current commands based on first and a second motor current commands associated with the first and second winding sets; calculating positive and negative final voltage commands based on the virtual half-motor current commands, and using first and second sets of gain factors; and commanding, based on the final voltage commands, inverters to apply an output voltage to each of two winding sets and thereby causing output currents to be generated herein. The output currents each have a d- and q-axis components, and at least one of the first set of gain factors and the second set of gain factors is configured to cause the d-axis component and the q-axis component of the first output current to be decoupled from variations of d-axis and q-axis components of the second output current.
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公开(公告)号：US20200268964A1
公开(公告)日：2020-08-27
申请号：US15930132
申请日：2020-05-12
发明人： Christian Nessel , René Richter , Robert Witt , Richard Guenther
IPC分类号： A61M5/142 , H02K41/03 , H02P8/00 , A61M5/30 , H02K11/225 , A61M5/20 , H02P25/066 , H02P8/34
摘要： The disclosure relates to a drug delivery device having a drive unit includes a stator comprising a plurality of coils consecutively arranged in an axial direction, and an armature axially movable within the stator, the armature including a number of magnets and pole shoes consecutively arranged in the axial direction. A respective pole shoe is arranged between respectively neighbouring magnets. At least one axial end of the armature comprises a terminal pole shoe.
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公开(公告)号：US10591697B2
公开(公告)日：2020-03-17
申请号：US15491210
申请日：2017-04-19
发明人： Joo Yul Ko , Joo Hyoung Lee , Jong Woo Lee , Je Hyuk Ryu , Woo Young Choi , Soo Woong Lee , Byung Joo Hong
IPC分类号： G02B7/02 , G02B7/09 , H02P8/00 , H02P6/00 , H02P25/034 , H02P7/02 , H02K41/035
摘要： A camera module actuator includes, a magnet, a coil, a driver, and a position estimating processor. The coil is disposed to face the magnet. The driver is configured to move the magnet by applying a driving signal to the coil. The position estimating processor is configured to estimate a position of the magnet from an oscillating signal. A frequency of the oscillating signal varies according to a movement of the magnet.
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公开(公告)号：US10439532B2
公开(公告)日：2019-10-08
申请号：US16033452
申请日：2018-07-12
发明人： Tsutomu Kawamoto
IPC分类号： B41J13/00 , H02P8/12 , H02P8/24 , B65H20/00 , B65H20/02 , B41J29/38 , H02P8/00 , B41J33/14 , H02P8/08 , H02P8/26 , H02P8/28 , H02P8/30
摘要： A driving device for a stepping motor includes a motor driving circuit configured to generate a current waveform representing an electrical angle in synchronization with a mechanical angle of the stepping motor, and excite the stepping motor using the current waveform; a memory configured to store a value of the electrical angle; and a controller configured to: when a power supply to the stepping motor and the motor driving circuit is stopped, store a first value of the electrical angle held by the motor driving circuit in the memory; and when the power supply is resumed, replace a value of the electrical angle of the motor driving circuit with the first value while suppressing a rotational operation of the stepping motor.
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8.发明授权公开(公告)号：US10348178B2
公开(公告)日：2019-07-09
申请号：US15881719
申请日：2018-01-26
发明人： Xiaodong Lu
摘要： Aspects of the invention provide methods and systems for moving a plurality of moveable stages relative to a stator. The stator comprises a plurality of coils shaped to provide pluralities of coil trace groups where each coil trace group comprises a corresponding plurality of generally linearly elongated coil traces which extend across a stator tile. Each moveable stage comprises a plurality of magnet arrays. Methods and apparatus are provided for moving the moveable stages relative to the stator, where a magnet array from a first moveable stage and a magnet array from a second moveable stage both overlap a shared group of coil traces. For at least a portion of the time that the magnet arrays from the first and second moveable stages overlap the shared group of coil traces, currents are controllably driven in the shared coil trace group based on the positions of both the first and second moveable stages. The positions of the first and second moveable stages may be ascertained by feedback.
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公开(公告)号：US20190181792A1
公开(公告)日：2019-06-13
申请号：US16210041
申请日：2018-12-05
发明人： Toyoaki Yamaoka , Noriyuki Watanabe
摘要： While a stepping motor for conveying a paper is being driven, a first clocking section enables a counting control section to add a first predetermined value to a count value each time a first predetermined period of time elapses. When the count value reaches a first threshold value, a motor stop determination section stops the motor. A second clocking section enables the counting control section to subtract a second predetermined value from the count value each time a second predetermined period of time elapses when the motor is stopped. When the count value falls below a second threshold value smaller than the first threshold value, a motor drive resuming section resumes the operation of the motor. A third clocking section enables the counting control section to subtract a third predetermined value from the count value each time a third predetermined period of time elapses when the stepping motor is stopped in a state in which the count value is smaller than the first threshold value.
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公开(公告)号：US20190167336A1
公开(公告)日：2019-06-06
申请号：US15917561
申请日：2018-03-09
发明人： Xiaojun LIU
摘要： The invention provides an intelligent moxibustion device, comprising a vertically disposed barrel, an ash tower buckled with the barrel, a moxa stick driving unit and an intelligent control unit disposed in the barrel; wherein the moxa stick driving unit comprises a moxa stick sleeve and a stepping motor disposed above the moxa stick sleeve; the stepping motor drives the moxa stick to move up and down through the transmission of a gear; the intelligent control unit comprises a battery disposed above the stepping motor for powering the entire moxibustion device, a circuit board fixed above the battery, and a temperature sensor disposed in the ash tower, the battery being connected to the circuit board to provide power to the circuit board, the circuit board being connected to the temperature sensor through input and output terminals.
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