公开(公告)号：US06900657B2

公开(公告)日：2005-05-31

申请号：US10668213

申请日：2003-09-24

申请人： Tanh M. Bui ,  Dacon T. Chow

发明人： Tanh M. Bui ,  Dacon T. Chow

IPC分类号： G01R31/06 ,  G01R31/34 ,  H02P8/36

CPC分类号： H02P8/36

摘要： A stall detection circuit and method for a stepper motor. The circuit has an H-bridge configuration with an additional circuit pathway to ground being connected at a point between two center windings. During the transition between step sequences, the circuit employs a monitoring phase in which the previously active low side driver is turned off such that current passes through only the first winding and then is diverted to ground via the additional pathway. While the phase voltage is thus momentarily extinguished, the second coil is used to monitor the motor's back EMF, from which it can be determined whether the rotor is in a normal running mode, a stall, or a reverse condition.

摘要翻译： 一种用于步进电机的失速检测电路和方法。 电路具有H桥结构，其中在两个中心绕组之间的点处连接有附加的电路通路。 在步进序列之间的转换期间，电路采用监测阶段，其中先前有效的低侧驱动器被关闭，使得电流仅通过第一绕组，然后经由附加通路转向接地。 在相电压暂时熄灭的情况下，第二线圈用于监视电动机的反电动势，从而可以确定转子是否处于正常行驶模式，失速或反向状态。

公开(公告)号：US06847179B2

公开(公告)日：2005-01-25

申请号：US10222971

申请日：2002-08-19

申请人： Bruce Q. Du ,  Tanh M. Bui

发明人： Bruce Q. Du ,  Tanh M. Bui

IPC分类号： G05B19/19 ,  G05B11/06

CPC分类号： H02P7/2913 ,  G05B2219/37168 ,  G05B2219/37171 ,  G05B2219/41329 ,  H02P7/0094

摘要： An actuator position control system for brush-type DC motors. The system includes a sensor, amplifier or differentiator, central control unit (microprocessor), and motor driver. The system utilizes the differential signal di/dt to indicate the falling edges of commutation spikes in the motor current profile. In a first embodiment, an inductor is selected as the signal sensor, because voltage drops across the inductor are directly proportional to di/dt. The voltage drop, L(di/dt), across the inductive sensor is input to the amplifier, amplified, and then sent to the microprocessor. In a second embodiment, a sensing resistor and a differentiator are substituted for the inductive sensor and amplifier, respectively. The microprocessor reads the output pulses from the amplifier or differentiator and compares the pulse count to an input command signal. The microprocessor then sends shaft position control information to the motor driver.

摘要翻译： 一种用于刷式直流电动机的执行器位置控制系统。 该系统包括传感器，放大器或微分器，中央控制单元（微处理器）和电机驱动器。 该系统利用差分信号di / dt来表示电动机电流曲线中的换向尖峰的下降沿。 在第一实施例中，选择电感器作为信号传感器，因为电感上的电压降与di / dt成正比。 电感传感器两端的电压降L（di / dt）被输入到放大器，放大后发送到微处理器。 在第二实施例中，感测电阻和微分器分别代替电感式传感器和放大器。 微处理器从放大器或微分器读取输出脉冲，并将脉冲计数与输入命令信号进行比较。 然后微处理器将轴位置控制信息发送到电机驱动器。

公开(公告)号：US06437533B1

公开(公告)日：2002-08-20

申请号：US09923438

申请日：2001-08-08

申请人： Bruce Q. Du ,  Tanh M. Bui

发明人： Bruce Q. Du ,  Tanh M. Bui

IPC分类号： G05B1101

CPC分类号： H02P7/2913 ,  G05B2219/37168 ,  G05B2219/37171 ,  G05B2219/41329 ,  H02P7/0094

摘要： An actuator position control system for brush-type DC motors. The system includes a sensing inductor, amplifier, central control unit (microprocessor), and motor driver. The system utilizes the differential signal di/dt to indicate the falling edges of commutation spikes in the motor current profile. An inductor is selected as the signal sensor, because voltage drops across the inductor are directly proportional to di/dt. The voltage drop, L(di/dt), across the inductive sensor is input to the amplifier, amplified, and then sent to the microprocessor. The microprocessor reads the output pulses from the amplifier and compares the pulse count to an input command signal. The microprocessor then sends shaft position control information to the motor driver.

摘要翻译： 一种用于刷式直流电动机的执行器位置控制系统。 该系统包括感应电感，放大器，中央控制单元（微处理器）和电机驱动器。 该系统利用差分信号di / dt来表示电动机电流曲线中的换向尖峰的下降沿。 选择电感作为信号传感器，因为电感上的电压降与di / dt成正比。 电感传感器两端的电压降L（di / dt）被输入到放大器，放大后发送到微处理器。 微处理器读取放大器的输出脉冲，并将脉冲计数与输入命令信号进行比较。 然后微处理器将轴位置控制信息发送到电机驱动器。

公开(公告)号：US20090193647A1

公开(公告)日：2009-08-06

申请号：US12068067

申请日：2008-02-01

申请人： Tanh M. Bui ,  Christopher J. Billman

发明人： Tanh M. Bui ,  Christopher J. Billman

IPC分类号： H01C17/00

CPC分类号： H01C17/065 ,  H01C17/281 ,  Y10T29/49082

摘要： A method of fabricating a potentiometer in which conductive stampings are cut to be both the connector pins and the substrate of the potentiometer. In the region where the potentiometer is desired, an insulating layer covers the surface of the stamping. The insulating layer can be the same material as the solder mask, and electrically isolates the connector pins from the resistive area. Next, carbon trace is screen-printed over the insulating layer where the potentiometer is desired, and oven-cured. This subassembly is then placed into a housing of plastic or another insulating material. Last, the feedback and ground pins are assembled into the plastic housing. The ground pin is laid on top of the end of the carbon trace to make an electrical connection to the resistive trace.

摘要翻译： 一种制造电位计的方法，其中导电冲压件被切割成电位计的连接器引脚和基板。 在需要电位器的区域中，绝缘层覆盖冲压件的表面。 绝缘层可以是与焊料掩模相同的材料，并且将连接器引脚与电阻区电隔离。 接下来，在需要电位计的绝缘层上丝网印刷碳迹线，并烘烤。 然后将该子组件放入塑料或另一绝缘材料的壳体中。 最后，将反馈和接地针组装到塑料外壳中。 接地引脚放置在碳迹线端部的顶部，以与电阻迹线电连接。

公开(公告)号：US06302747B1

公开(公告)日：2001-10-16

申请号：US09562007

申请日：2000-05-02

申请人： Tanh M. Bui ,  David W. Rawls

发明人： Tanh M. Bui ,  David W. Rawls

IPC分类号： H01R13405

CPC分类号： H01R13/648 ,  H01R13/6625 ,  H01R43/24

摘要： An actuator housing provides a low-cost method of achieving electrical connection to the motor terminals of a DC motor in a two position HVAC actuator. The connector configuration interfacing with a controller or power supply is easily changed by making the connector a modular connector, providing an effective fluid ingress prevention. The modular connector design is fixed from the connector flange inward into a housing, and is flexible outward with respect to its pin configuration and shroud shape. This design allows different connector configurations to be utilized with minimal tooling investment. A capacitor can also be inserted and crimped to the connector pin stampings, prior to being over-molded, to provide EMI filtering.

摘要翻译： 致动器壳体提供了一种低成本的方法，其实现了在两个位置HVAC致动器中的直流电动机的电动机端子的电连接。 通过使连接器成为模块化连接器，可以轻松地改变与控制器或电源接口的连接器配置，从而提供有效的流体入口防止。 模块化连接器设计从连接器凸缘向内固定到壳体中，并且相对于其销的构型和护罩形状向外弹性。 这种设计允许使用不同的连接器配置，并以最小的工具投资。 在过模制之前，也可以将电容器插入并压接到连接器针冲压件，以提供EMI滤波。

公开(公告)号：US07035951B2

公开(公告)日：2006-04-25

申请号：US10727053

申请日：2003-12-04

申请人： Tanh M. Bui ,  Reiner E. Stockfisch ,  Tobias Taufer

发明人： Tanh M. Bui ,  Reiner E. Stockfisch ,  Tobias Taufer

IPC分类号： G06F13/00

CPC分类号： H04L29/12254 ,  H04L12/403 ,  H04L12/4135 ,  H04L61/2038 ,  H04L2012/40273

摘要： A system and method for auto-addressing devices on a multiplexing bus in which a plurality of devices are arranged in series, with each having a bus in and bus out. During an initial evaluation, and beginning with a low bus in, each device inverts the incoming signal so that a device with a low bus in has a high bus out. During a second evaluation, the high or low state of the bus in is inverted only if the bus out in the first evaluation was high. Similarly, during subsequent evaluations, the high or low state of the bus in is inverted only if the bus out state of all previous evaluations was high. Ultimately, only one device will have a high bus out, with all bus out states from previous evaluations also having been high, at which point all addresses are fully decoded.

摘要翻译： 一种用于在多路复用总线上自动寻址设备的系统和方法，其中多个设备串联布置，每个设备具有总线和总线输出。 在初始评估期间，并从低总线开始，每个设备反转输入信号，使得总线低的器件具有高的总线输出。 在第二次评估中，只有在第一次评估中的公共汽车高时，总线的高低状态才会反转。 类似地，在随后的评估期间，只有当所有以前的评估的总线出状态为高时，总线的高或低状态才被反转。 最终，只有一个设备将具有高的总线输出，所有来自先前评估的总线输出状态也都很高，此时所有地址都被完全解码。

公开(公告)号：US06667564B1

公开(公告)日：2003-12-23

申请号：US10225245

申请日：2002-08-22

申请人： Tanh M. Bui ,  Bruce Q. Du ,  Jeffrey D. Mobley

发明人： Tanh M. Bui ,  Bruce Q. Du ,  Jeffrey D. Mobley

IPC分类号： H02K100

CPC分类号： H02K23/42 ,  H02K5/148 ,  H02K23/62

摘要： A mechanically-commutated DC motor has a mechanical commutation system and an “inside-out” configuration, in which the stator assembly comprises the windings and the rotor assembly comprises the permanent magnet. The motor includes a rotor assembly, a stator assembly, a plurality of terminating conductive pads, and positive and negative stationary power supply terminals. The stator assembly includes a plurality of lamination stacks positioned around a central aperture and a plurality of copper coils, each coil being wound around one of the lamination stacks. The rotor assembly includes a rotor body with a permanent magnet ring and a non-conductive timing cam integrated into one face of the rotor body. The permanent magnet ring is radially magnetized in an alternating polarity pattern with at least one pair of poles. The mechanical commutation system comprises the timing cam integrated into the rotor assembly, the power supply terminals, and the conductive pads. There are the same number of conductive pads as stator coils. Each conductive pad has first and second flexible contacts selectively movable into and out of electrical contact with the positive and negative power supply terminals, respectively, in response to the action of the timing cam. Adjacent ends of adjacent coils terminate on a common conductive pad, so that the ends of each coil terminate on two different conductive pads, and each conductive pad receives the ends of two different coils.

摘要翻译： 机械换向直流电动机具有机械换向系统和“内外”结构，其中定子组件包括绕组，转子组件包括永磁体。 电动机包括转子组件，定子组件，多个终端导电焊盘以及正和负固定电源端子。 定子组件包括围绕中心孔和多个铜线圈定位的多个层压叠层，每个线圈缠绕在叠片堆叠之一上。 转子组件包括具有永磁体环的转子体和集成在转子主体的一个面中的非导通正时凸轮。 永久磁环以至少一对磁极以交替极性图案径向磁化。 机械换向系统包括集成到转子组件中的定时凸轮，电源端子和导电垫片。 与定子线圈相同数量的导电焊盘。 每个导电焊盘具有分别响应于定时凸轮的作用而分别与正和负电源端子电接触的第一和第二柔性触点。 相邻线圈的相邻端终止在公共导电焊盘上，使得每个线圈的端部终止于两个不同的导电焊盘上，并且每个导电焊盘接收两个不同线圈的端部。