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公开(公告)号：WO2022164541A1
公开(公告)日：2022-08-04
申请号：PCT/US2021/064273
申请日：2021-12-20
IPC分类号： H02P29/02
摘要： A motor control system for controlling operation of a motor having a plurality of windings includes a gate driver to provide a control signal to one or more switching elements controlling a voltage applied to the plurality of windings and a Field Oriented Control (FOC) controller configured to generate a PWM signal for coupling to the gate driver, wherein the FOC controller comprises a d-axis control loop configured to generate an applied d-axis voltage and a q-axis control loop configured to generate an applied q-axis voltage. A stall detector is configured to calculate an estimate of the q-axis voltage and compare the applied q-axis voltage to a threshold based on the estimate in order to detect a stall condition of the motor.
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公开(公告)号：WO2021021333A1
公开(公告)日：2021-02-04
申请号：PCT/US2020/038025
申请日：2020-06-17
摘要： A magnetic field sensor (100,200) includes a substrate (102,202) and first and second magnetic field sensing elements (104, A-D) responsive to a magnet, comprising first and second magnetoresistance elements, respectively. At one or more positions of the magnet relative to the first and second magnetic field sensing elements while the magnet is stopped moving, at least one of the magnetic field sensing elements is in saturation in response to the magnet. A third magnetic field sensing element (E) proximate to the first and second magnetoresistance elements is operable to generate a third magnetic field sensing element signal responsive to the magnet, wherein, at the one or more positions while the magnet is stopped moving, the third magnetic field sensing element is not in saturation in response to the magnet or saturates at a higher magnetic field than the first and second magnetic field sensing elements in response to the magnet.
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公开(公告)号：WO2021007001A1
公开(公告)日：2021-01-14
申请号：PCT/US2020/038026
申请日：2020-06-17
摘要： A magnetic field sensor responsive to a movement of a target object can include a plurality of magnetoresistance elements arranged in a line and having a span according to y(1-1/x), where y is equal a full spatial period of the target object and where x is equal to a total quantity of magnetoresistance elements in the plurality of magnetoresistance elements. The plurality of magnetic field sensing elements is operable to generate a signal that is substantially not responsive to the movement of the target object but is responsive to stray external magnetic fields.
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公开(公告)号：WO2018217342A2
公开(公告)日：2018-11-29
申请号：PCT/US2018/028475
申请日：2018-04-20
摘要： A magnetic field sensor includes at least one coil responsive to an AC coil drive signal; at least two spaced apart magnetic field sensing elements responsive to a sensing element drive signal and positioned proximate to the at least one coil; and a circuit coupled to the at least two magnetic field sensing elements to generate an output signal of the magnetic field sensor indicative of a difference between a distance of a conductive target with respect to each of the at least two spaced apart magnetic field sensing elements.
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公开(公告)号：WO2018175057A1
公开(公告)日：2018-09-27
申请号：PCT/US2018/019875
申请日：2018-02-27
发明人： LU, Yisong , ALGER, Christopher , AMBRUSON, Lyndon
IPC分类号： H02P6/16
摘要： Method and apparatus for providing error compensation for a magnetic field sensing element in a three-phase motor. In embodiments, a driving angle is determined from zero-crossings of the magnet pole-pairs and error compensation levels for the pole-pairs is determined to reduce distortions in the motor current waveform.
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公开(公告)号：WO2018048768A1
公开(公告)日：2018-03-15
申请号：PCT/US2017/050014
申请日：2017-09-05
发明人： PRENTICE, Seth , FINNEMAN, Michael
IPC分类号： G01P21/02
摘要： In one aspect, an integrated circuit (IC) includes a sensor. The sensor includes a processor configured to provide speed and/or direction of a target object based on the speed of the target object. The processor monitors for a diagnostic fault which is a low level fault which still allows to detect speed; if such a diagnostic fault is detected, information about the fault is transmitted. The processor also monitors for critical faults, which do not allow to determine speed any more. In this case, the occurrence of such a critical fault is reported. The processor continues to monitor the fault, and only once the sensor recovers from the critical fault, data and information bits are transmitted.
摘要翻译： 在一个方面，集成电路（IC）包括传感器。 传感器包括处理器，该处理器被配置为基于目标物体的速度提供目标物体的速度和/或方向。 处理器监视诊断故障，该故障是仍然允许检测速度的低水平故障; 如果检测到这样的诊断故障，则发送关于故障的信息。 处理器还监视关键故障，这不允许再判断速度。 在这种情况下，会报告发生这种严重故障。 处理器继续监视故障，只有当传感器从严重故障中恢复时，才会传输数据和信息位。
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公开(公告)号：WO2017213823A1
公开(公告)日：2017-12-14
申请号：PCT/US2017/033526
申请日：2017-05-19
发明人： DAVID, Paul, A. , VIG, Ravi
摘要： A back-biased magnetic field sensor uses one or more magnetic field sensing elements upon a substrate, each outside of a substrate region in which magnetic field lines are near perpendicular to the substrate and outside of which magnetic field lines are not to the substrate. The back-biased magnetic field sensor can sense an approaching and/or a retreating ferromagnetic object.
摘要翻译： 背偏磁场传感器在衬底上使用一个或多个磁场感测元件，每个磁场感测元件在其中磁场线接近垂直于衬底且在其外部的磁场外的衬底区域外部 线不是基板。 背偏磁场传感器可以感测接近和/或退缩的铁磁物体。
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8.发明申请
公开(公告)号：WO2017213811A1
公开(公告)日：2017-12-14
申请号：PCT/US2017/033052
申请日：2017-05-17
发明人： VIG, Ravi , DAVID, Paul, A. , SHOEMAKER, Eric, G.
IPC分类号： G01D5/14
摘要： Magnetic field sensors can sense speed of movement and direction of movement of a ferromagnetic object. The magnetic field sensors employ both planar Hall effect elements and vertical Hall effect elements to generate two-state signals in two different signal paths with relative phases that are ninety degrees apart, the ninety degrees having sufficient margin to aid in detection of the direction of motion. Other magnetic field sensors use at least four vertical Hall effect elements to identify a speed of rotation and a direction of rotation of a moving ferromagnetic object.
摘要翻译： 磁场传感器可以感测铁磁物体的运动速度和运动方向。 磁场传感器采用平面霍尔效应元件和垂直霍尔效应元件来在两个不同信号路径中产生两相间相隔90度的相位相位的信号路径，90度具有足够的余量以帮助检测运动方向 。 其他磁场传感器使用至少四个垂直霍尔效应元件来识别运动的铁磁物体的旋转速度和旋转方向。
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9.发明申请ASSEMBLY USING A MAGNETIC FIELD SENSOR FOR DETECTING A ROTATION AND A LINEAR MOVEMENT OF AN OBJECT 审中-公开装配用磁场传感器检测物体的旋转和线性运动
公开(公告)号：WO2017160496A1
公开(公告)日：2017-09-21
申请号：PCT/US2017/020067
申请日：2017-03-01
摘要： An assembly has a base structure, a rotatable structure, a first magnet coupled to the base structure, a second magnet coupled to the rotatable structure, and a magnetic field sensor. The magnetic field sensor can identify at least one condition (i.e., position) of the assembly.
摘要翻译： 组件具有基部结构，可旋转结构，耦合到基部结构的第一磁体，耦合到可旋转结构的第二磁体以及磁场传感器。 磁场传感器可以识别组件的至少一个状态（即位置）。
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公开(公告)号：WO2017151396A1
公开(公告)日：2017-09-08
申请号：PCT/US2017/019197
申请日：2017-02-23
发明人： EAGEN, Jeffrey , TAYLOR, William P.
IPC分类号： G01D5/14
摘要： A magnetic field sensor includes a plurality of magnetoresistance elements, each having at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel. Illustrative characteristics selected to provide the respective responses include dimensions and/or construction parameters such as materials, layer thickness and order, and spatial relationship of the magnetoresistance element to the applied magnetic field. A method includes providing each of a plurality of magnetoresistance elements with at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel.
摘要翻译： 磁场传感器包括多个磁阻元件，每个磁阻元件具有至少一个被选择为对所施加的磁场提供相应的不同响应的特性，其中多个磁阻元件中的每一个耦合到 平行。 选择用于提供相应响应的说明性特征包括尺寸和/或构造参数，例如材料，层厚度和顺序以及磁阻元件与施加的磁场的空间关系。 一种方法包括为多个磁阻元件中的每一个提供至少一个被选择以提供对所施加的磁场的相应不同响应的特性，其中多个磁阻元件中的每一个并联耦合。
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