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61. 发明授权

US10439539B2 Feedback control system and method 有权
公开(公告)号：US10439539B2
公开(公告)日：2019-10-08
申请号：US15135330
申请日：2016-04-21
申请人： ANALOG DEVICES GLOBAL UNLIMITED COMPANY
发明人： Jesus Javier Lopez , Alberto Marinas , Eduardo M. Martinez , Santiago Iriarte
IPC分类号： H02P25/034
摘要： The present disclosure provides a feedback control system and method for a bidirectional VCM. The system employs an analog core that is common to both the PWM and linear modes of operation. The analog core includes a feedback mechanism that determines the error in the current flowing through the motor. The feedback mechanism produces an error voltage that corresponds to the current error, and applies the voltage to a control driver. The control driver then controls the motor, based on the error voltage, in either a PWM or linear mode. By sharing a common core, the switching time between modes is improved. Furthermore, the output current error between modes is reduced.

62. 发明申请

US20190131906A1 APPARATUS FOR CONTROLLING POSITION OF VOICE COIL MOTOR USING VOLTAGE/FREQUENCY CONVERSION TECHNIQUES 审中-公开
公开(公告)号：US20190131906A1
公开(公告)日：2019-05-02
申请号：US16144070
申请日：2018-09-27
申请人： Samsung Electro-Mechanics Co., Ltd.
发明人： Jung Eui PARK , Woo Young CHOI , Joo Hyoung LEE , Joo Yul KO
IPC分类号： H02P25/034 , G02B7/04
CPC分类号： H02P25/034 , G02B7/04 , G02B7/08 , H02P6/00
摘要： An apparatus for controlling a position of a voice coil motor (VCM) includes a coil disposed to face a magnetic member provided on one surface of a lens carrier; a driving circuit applying a superimposed current, including a driving current and a position detecting current, to the coil; a filter circuit extracting an alternating current (AC) voltage from a voltage across the coil; a voltage/frequency conversion circuit converting the AC voltage extracted by the filter circuit into a frequency signal; and a digital control circuit detecting positional information of the VCM based on a frequency component of the frequency signal.

63. 发明授权

US10141880B2 Driving circuit for voice coil motor having a first driver coupled to a first end of a coil and a second driver coupled to a second end of the coil 有权
公开(公告)号：US10141880B2
公开(公告)日：2018-11-27
申请号：US14920266
申请日：2015-10-22
申请人： ROHM CO., LTD.
发明人： Tatsuya Ninomiya
IPC分类号： G02B27/64 , H02P25/028 , G02B7/04 , G02B7/08 , H02P25/06 , H04N5/225 , H04N5/232 , H02P25/034
摘要： With a driving current as IDRV, with a reference voltage as VREF, and with a gain as k, a current detection circuit generates a detection voltage VS represented by VS=VREF+k×IDRV. An error amplifier amplifies a difference between the detection voltage VS and a control voltage that indicates a position of the VCM so as to generate an error voltage VERR. A first driver switches the driving current IDRV between a source current and a sink current with respect to one end of the coil according to the error voltage VERR. A second driver switches the driving current IDRV between a sink current and a source current with respect to the other end of the coil according to the error voltage VERR. The driving circuit allows an external circuit to set the level of the reference voltage VREF.

64. 发明授权

US09913041B2 Voice coil motor and loudspeaker controller 有权
公开(公告)号：US09913041B2
公开(公告)日：2018-03-06
申请号：US14821607
申请日：2015-08-07
申请人： NXP B.V.
发明人： Lise Daubigny
IPC分类号： H04R29/00 , H04R9/06 , H04R3/02 , H02P25/034
CPC分类号： H04R9/06 , H02P25/034 , H04R3/02
摘要： A voice coil motor controller configured to determine a voltage across and a current through a voice coil motor having an input signal supplied thereto and determine its impedance therefrom, the controller further configured to identify asymmetry in variations of said impedance over time to determine an asymmetry value, the controller further configured to provide for control of said voice coil motor using said asymmetry value.

65. 发明授权

US09784594B2 Hall-effect based linear motor controller 有权
公开(公告)号：US09784594B2
公开(公告)日：2017-10-10
申请号：US13240159
申请日：2011-09-22
申请人： Paul David , Shaun D. Milano
发明人： Paul David , Shaun D. Milano
IPC分类号： H04N5/232 , H02K11/215 , H02P25/034 , G01D5/14 , G02B7/10 , H02K41/035 , H02P6/00 , G03B13/36 , H02P25/06 , H04N5/225
CPC分类号： G01D5/145 , G02B7/102 , G03B13/36 , H02K11/215 , H02K41/0352 , H02P6/006 , H02P25/034 , H02P25/06 , H04N5/2253 , H04N5/23212
摘要： A linear motion control device for use in a linear control system is presented. The linear motion control device includes a coil driver to drive a coil that, when driven, effects a linear movement by a motion device having a magnet. The linear motion control device also includes a magnetic field sensor to detect a magnetic field associated with the linear movement and an interface to connect an output of the magnetic field sensor and an input of the coil driver to an external controller. The interface includes a feedback loop to relate the magnetic field sensor output signal to the coil driver input.

66. 发明授权

US4565956A Fast-acting servo drive system 失效
标题翻译：快速伺服驱动系统
公开(公告)号：US4565956A
公开(公告)日：1986-01-21
申请号：US658466
申请日：1984-10-09
申请人： Peter Zimmermann , John W. Teape
发明人： Peter Zimmermann , John W. Teape
IPC分类号： H02K29/00 , H02P6/06 , H02P25/03 , H02P25/034 , H02P5/28
CPC分类号： H02P25/03 , H02P25/034
摘要： To provide for fast response of a servo drive with a synchronous machine in which the same torque is available over the entire rotational range of the machine regardless of angular position of the rotor, phase currents to phase windings, preferably three-phase, are controlled in dependence on required torque, and steered to the respective phase windings by a rotor position transducer in such a manner that the sum of all the phase currents remains constant, and is connected to the respective phase windings, in pulses, during an electrical angular range when induced armature counter electromotive force voltages in the respective phase windings, which have an essentially trapezoidal shape, are in their flat or unvarying range within the voltage distribution during revolution of the rotor. Thus, currents are supplied to the phase windings only when the counter EMF voltages are essentially constant. A full-wave bridge-type current supply is suitable, using semiconductor switches, which are suitably controlled to steer currents to the respective phase windings, thus reducing commutating losses since only one of the semiconductor switches is switched ON or OFF, the remaining semiconductor switches functioning only as current steering elements.
摘要翻译：为了提供伺服驱动器与同步电机的快速响应，其中在整个转子的整个旋转范围内可以获得相同的扭矩，而不管转子的角位置如何，相电流到相绕组，优选三相的控制在依赖于所需的转矩，并且以转子位置传感器转向相应的相绕组，使得所有相电流的和保持恒定，并且在电角度范围内以脉冲方式连接到相应的相绕组，具有大致梯形形状的各相绕组中的感应电枢反电动势电压在转子旋转期间的电压分布内处于平坦或不变的范围内。因此，仅当反电势电压基本恒定时才将电流提供给相绕组。全波桥式电流源适合使用半导体开关，其适当地被控制以将电流转向相应的相绕组，从而减少换向损耗，因为只有一个半导体开关被接通或断开，其余的半导体开关仅用作当前的转向元件。

67. 发明授权

US11611704B2 Motor controller 有权
公开(公告)号：US11611704B2
公开(公告)日：2023-03-21
申请号：US16821973
申请日：2020-03-17
申请人： Global Mixed-mode Technology Inc.
发明人： Wei-Yu Chen , Ching-Lung Tsai
IPC分类号： H02P25/034 , H02P13/00 , H04N5/232
摘要： A motor controller used for driving a motor is provided. The motor includes a motor coil and a maximum rated current. The motor controller comprises a driving circuit, a control unit, a digital-to-analog converter, an operational amplifier, a switch circuit, and a resistor. When it is needed to decrease a settling time for the motor to reach a target position, or a vibration is detected within a camera module so as to enable an image stabilization mechanism, it is capable of temporarily supplying a driving current greater than the maximum rated current to the motor coil.

68. 发明授权

US11552586B2 Feedback control system and method 有权
公开(公告)号：US11552586B2
公开(公告)日：2023-01-10
申请号：US16594499
申请日：2019-10-07
申请人： Analog Devices International Unlimited Company
发明人： Jesus Javier Lopez , Alberto Marinas , Eduardo M. Martinez , Santiago Iriarte
IPC分类号： H02P25/034
摘要： The present disclosure provides a feedback control system and method for a bidirectional VCM. The system employs an analog core that is common to both the PWM and linear modes of operation. The analog core includes a feedback mechanism that determines the error in the current flowing through the motor. The feedback mechanism produces an error voltage that corresponds to the current error, and applies the voltage to a control driver. The control driver then controls the motor, based on the error voltage, in either a PWM or linear mode. By sharing a common core, the switching time between modes is improved. Furthermore, the output current error between modes is reduced.

69. 发明授权

US11336216B1 Linear resonant actuator as a tap, touch and pressure sensor using back EMF 有权
公开(公告)号：US11336216B1
公开(公告)日：2022-05-17
申请号：US17136811
申请日：2020-12-29
申请人： Google LLC
发明人： Artem Dementyev , Richard Francis Lyon , Alex Olwal
IPC分类号： H02P25/034
摘要： The present disclosure provides systems and methods for using a linear resonant actuator (“LRA”) to determine a type of contact between a device and its surroundings. The LRA may be coupled to an amplifier by one or more switches. The audio amplifier may receive a signal from a microcontroller and transmit the signal the LRA when the switches are closed. When the switches are in an open position, the LRA may be actively sensing for the type of contact. The back EMF may be measured when the switches are open. The measured back EMF waveform may be used to determine the type of contact. When the signal is not being transmitted, the LRA may be passively sensing to determine whether the device was tapped.

70. 发明申请

US20210132327A1 Camera Actuator For Lens And Sensor Shifting 有权
公开(公告)号：US20210132327A1
公开(公告)日：2021-05-06
申请号：US17145100
申请日：2021-01-08
申请人： Apple Inc.
发明人： Shashank Sharma , Douglas S. Brodie , Scott W. Miller
IPC分类号： G02B7/09 , H02P25/034 , H04N5/232 , H04N5/225
摘要： Some embodiments include a camera voice coil motor (VCM) actuator configured to shift a lens and/or an image sensor along multiple axes. The VCM actuator may include a bottom flexure and a top flexure that connect one or more dynamic members to one or more static members. The VCM actuator may include stationary magnets and coils held by dynamic members. In some cases, the VCM actuator may be configured to move the image sensor along an optical axis, to move the image sensor in directions orthogonal to the optical axis, and/or to tilt the image sensor relative to the orthogonal axis. In some examples, the VCM actuator may be configured to move the image sensor in directions orthogonal to the optical axis, to move the lens along the optical axis, and/or to tilt the lens relative to the optical axis.

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