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公开(公告)号：US4706553A
公开(公告)日：1987-11-17
申请号：US732205
申请日：1985-05-08
IPC分类号： B08B15/02
CPC分类号： B08B15/023
摘要： A fume hood controller system in which the sash position is monitored by a transducer which provides a signal indicative of the area of the hood opening. A variable speed motor controller is responsive to the sash position signal to provide a fan speed which varies in a substantially continuous and linear manner as a function of the sash opening. In an alternate embodiment, the air flow through the hood is controlled by a damper or similar device. Several embodiments are shown in which the present invention may be used to control a fume hood system in which a blower exhausts a plurality of fume hoods while maintaining a substantially constant face velocity in each hood.
摘要翻译： 通风柜控制器系统，其中窗扇位置由提供指示罩开口面积的信号的换能器监控。 变速电动机控制器响应窗扇位置信号以提供作为窗扇开口的函数以基本上连续和线性的方式变化的风扇速度。 在替代实施例中，通过罩的空气流由阻尼器或类似装置控制。 示出了几个实施例，其中本发明可用于控制通风橱系统，其中鼓风机排放多个通风橱，同时在每个罩中保持基本恒定的面速。
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公开(公告)号：US4413223A
公开(公告)日：1983-11-01
申请号：US257534
申请日：1981-04-27
CPC分类号： H02P9/04
摘要： A frequency control system for an n-phase induction machine having an input shaft and at least one output line, where n is an integer. The system includes a generator that provides an electrical frequency control signal, f.sub.e, which is representative of the difference between the phase of the voltage on the output line and the phase of a reference signal. The system further includes a generator for providing a mechanical frequency control signal which is representative of the frequency of rotation of the input shaft to the induction generator. Another generator provides a torque generator control signal which is representative of the difference between the electrical frequency control signal and the mechanical frequency control signal. A torque generator, such as an internal combustion engine, is adapted to be responsive to the torque generator control signal for applying a torque to the input shaft of the induction machine, where the applied torque is related to the torque generator control signal.
摘要翻译： 一种用于n相感应电机的频率控制系统，其具有输入轴和至少一条输出线，其中n是整数。 该系统包括发电机，其提供电频率控制信号fe，其表示输出线上的电压的相位与参考信号的相位之间的差。 该系统还包括用于提供表示输入轴到感应发电机的旋转频率的机械频率控制信号的发电机。 另一个发电机提供了代表电气频率控制信号和机械频率控制信号之间的差异的扭矩发生器控制信号。 诸如内燃机的扭矩发生器适于响应扭矩发生器控制信号，以向感应电机的输入轴施加扭矩，其中所施加的转矩与转矩发生器控制信号相关。
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公开(公告)号：US4528898A
公开(公告)日：1985-07-16
申请号：US586007
申请日：1984-03-05
CPC分类号： B08B15/023
摘要： A fume hood controller system in which the sash position is monitored by a transducer which provides a signal indicative of the area of the hood opening. A variable speed controller responsive to the sash position signal to provides a fan speed which varies as a function of the sash opening. An optional circuit monitors the power drawn by the motor and compares the actual power drawn by the motor with the expected power for the present sash position. If the actual power falls below the threshold, an alarm signal is generated indicating a reduced air flow in the fume hood. Additionally, motor overload may be detected by comparing the motor speed control signal with the actual motor speed. An alternate embodiment is shown in which the present invention may be used to control a single blower which exhausts a plurality of fume hoods while maintaining a substantially constant face velocity in each hood.
摘要翻译： 通风柜控制器系统，其中窗扇位置由提供指示罩开口面积的信号的换能器监控。 响应于窗框位置信号的变速控制器提供根据窗扇开口而变化的风扇速度。 一个可选的电路监测电动机的功率，并将电动机的实际功率与当前窗框位置的预期功率进行比较。 如果实际功率低于阈值，则产生指示通风橱中的气流减少的报警信号。 此外，可以通过将电动机速度控制信号与实际电动机速度进行比较来检测电动机过载。 示出了一个替代实施例，其中本发明可用于控制排出多个通风柜的单个鼓风机，同时在每个罩中保持基本恒定的面速。
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公开(公告)号：US08154228B2
公开(公告)日：2012-04-10
申请号：US12481925
申请日：2009-06-10
申请人： George B. Yundt , David S. Colson
发明人： George B. Yundt , David S. Colson
IPC分类号： H02P3/00
CPC分类号： H02P21/36
摘要： A system and method are provided for improved dynamic braking in AC motors with an electronic drive, and more particularly to using a current regulation circuit to control the current supplied to the motor to be in phase with the internal EMF voltage of the motor such that the braking torque of the current is maximized per ampere of dynamic braking current when needed to stop the motor in case of a control failure or emergency. A current regulator produces a voltage command to the motor based on the current command input. The motor is still controlled by a d-q current regulator and the q-axis (torque axis) voltage is driven to zero while the d-axis (non-torque axis) is left in current control with a zero current command. This way the motor internal voltage drives a current in the terminals of the motor but the current is in phase with the internal voltage of the motor. Since the current loops are still active, current limiting may be implemented and the dynamic brake current amplitude can be well controlled and entirely goes into stopping the motor.
摘要翻译： 提供了一种用于改进具有电子驱动器的AC电动机中的动态制动的系统和方法，更具体地涉及使用电流调节电路来控制供应到电动机的电流与电动机的内部EMF电压相同，使得 在控制故障或紧急情况下需要停止电机时，电动机的制动力矩可以每安培的动态制动电流最大。 电流调节器根据电流指令输入向电机产生电压指令。 电动机仍由d-q电流调节器控制，并且q轴（转矩轴）电压被驱动为零，而d轴（非转矩轴）以零电流指令留在电流控制中。 这样电动机内部电压驱动电动机端子中的电流，但电流与电动机的内部电压同相。 由于电流环路仍然有效，因此可以实现电流限制，动态制动电流幅度可以很好地控制，并且完全停止电动机。
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公开(公告)号：US20100315025A1
公开(公告)日：2010-12-16
申请号：US12481925
申请日：2009-06-10
申请人： George B. Yundt , David S. Colson
发明人： George B. Yundt , David S. Colson
IPC分类号： H02P3/12
CPC分类号： H02P21/36
摘要： A system and method are provided for improved dynamic braking in AC motors with an electronic drive, and more particularly to using a current regulation circuit to control the current supplied to the motor to be in phase with the internal EMF voltage of the motor such that the braking torque of the current is maximized per ampere of dynamic braking current when needed to stop the motor in case of a control failure or emergency. A current regulator produces a voltage command to the motor based on the current command input. The motor is still controlled by a d-q current regulator and the q-axis (torque axis) voltage is driven to zero while the d-axis (non-torque axis) is left in current control with a zero current command. This way the motor internal voltage drives a current in the terminals of the motor but the current is in phase with the internal voltage of the motor. Since the current loops are still active, current limiting may be implemented and the dynamic brake current amplitude can be well controlled and entirely goes into stopping the motor.
摘要翻译： 提供了一种用于改进具有电子驱动器的AC电动机中的动态制动的系统和方法，更具体地涉及使用电流调节电路来控制提供给电动机的电流与电动机的内部EMF电压相同，使得 在控制故障或紧急情况下需要停止电机时，电动机的制动力矩可以每安培的动态制动电流最大。 电流调节器根据电流指令输入向电机产生电压指令。 电动机仍由d-q电流调节器控制，并且q轴（转矩轴）电压被驱动为零，而d轴（非转矩轴）以零电流指令留在电流控制中。 这样电动机内部电压驱动电动机端子中的电流，但电流与电动机的内部电压同相。 由于电流环路仍然有效，因此可以实现电流限制，动态制动电流幅度可以很好地控制，并且完全停止电动机。
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公开(公告)号：US06433536B1
公开(公告)日：2002-08-13
申请号：US09223943
申请日：1998-12-31
IPC分类号： G01B730
CPC分类号： G01D5/145
摘要： The present invention is an apparatus for indicating the instantaneous position of a movable member along a range of motion with respect to a reference position. The apparatus includes a magnetic body that is fixedly attached to the movable member. The body has a contoured surface to control the shape of a magnetic field relative to position, and further includes at least two magnetic field sensors. Each of the sensors is disposed adjacent to the contoured surface of the magnetic body and fixed with respect to the reference position, and is positioned apart from the other sensors, so as to form a non-uniform gap between the contoured surface and each of the magnetic field sensors. Each of the sensors produces a position dependent signal corresponding to a value of the magnetic field. The apparatus further includes a decoding circuit electrically coupled to each of the magnetic field sensors so as to receive each of the position dependent signals. The decoding circuit produces a position dependent signal that is a predetermined function of the position dependent signals. Multiple sensors can be utilized to provide redundancy. Further, the apparatus can provide measurement correction of measurement errors caused by incorrect location of the magnetic field sensors.
摘要翻译： 本发明是一种用于指示可移动部件相对于基准位置的运动范围的瞬时位置的装置。 该装置包括固定在可移动部件上的磁体。 主体具有轮廓表面以相对于位置控制磁场的形状，并且还包括至少两个磁场传感器。 每个传感器设置成与磁体的轮廓表面相邻并且相对于参考位置固定，并且与其它传感器分开定位，以便在轮廓表面和每个传感器之间形成不均匀的间隙 磁场传感器。 每个传感器产生对应于磁场值的与位置相关的信号。 该装置还包括电耦合到每个磁场传感器以便接收每个位置相关信号的解码电路。 解码电路产生位置相关信号，该位置相关信号是位置相关信号的预定函数。 可以利用多个传感器来提供冗余。 此外，该装置可以提供由磁场传感器的不正确位置引起的测量误差的测量校正。
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7.发明申请Systems and Methods for Supporting Two Different Protocols on a Same Physical Connection 有权在同一物理连接上支持两种不同协议的系统和方法公开(公告)号：US20130121346A1
公开(公告)日：2013-05-16
申请号：US13294236
申请日：2011-11-11
IPC分类号： H04J3/16
CPC分类号： H04L12/4625 , H04L12/66 , H04L69/163 , H04L69/18 , H04L69/22
摘要： Systems and methods of supporting communications over a common network connection in a master-slave field bus network with a first type of packet formatted with a time-sensitive protocol and a second type of packet formatted with a non-time-sensitive protocol are provided. The slave devices are configured with filters to prevent the first type of packet from reaching a configurator and the second type from reaching a master device. The slave devices are also configured with arbitration logic so that the packets formatted with the time-sensitive protocol are provided with a priority over the packets formatted with the non-time-sensitive protocol.
摘要翻译： 提供了支持通过主 - 从现场总线网络中的公共网络连接进行通信的系统和方法，其中具有用时间敏感协议格式化的第一类型的分组和具有非时间敏感协议格式化的第二类型分组。 从设备配置有过滤器，以防止第一类型的数据包到达配置器，第二种类型到达主设备。 从设备还配置有仲裁逻辑，使得以时间敏感协议格式化的分组具有比非时间敏感协议格式化的分组的优先级。
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8.发明授权
公开(公告)号：US4804903A
公开(公告)日：1989-02-14
申请号：US548404
申请日：1983-11-03
申请人： George B. Yundt
发明人： George B. Yundt
CPC分类号： G01R19/0092 , G01R1/06766
摘要： A new sensor means for accurately measuring the current flowing in an electronically controlled switch is presented. An ac coupled current sensor is arranged in circuit with the electronically controlled power switch. The output of the sensor channel is zeroed (or restored to another fixed independent level) whenever the power switch is in the OFF condition. Using the natural modulation of the power switch itself to coordinate the reconciling of the sensor output level with the OFF state of the power switch helps restore to the dc level lost through ac coupling. This coordination of the sensor with the switch itself reduces dc offset and drift and allows ac coupling, which removes dc common mode and increases primary current sensor flexibility, all without adding complexity. A plurality of such sensors can be combined to measure indirectly the load current from a plurality of switches according to Kirchoff's Current Law.
摘要翻译： 提出了一种用于精确测量电子控制开关中流动的电流的新型传感器。 交流耦合电流传感器与电子控制电源开关配置在电路中。 只要电源开关处于关闭状态，传感器通道的输出就被清零（或恢复到另一个固定的独立电平）。 使用电源开关本身的自然调制来协调传感器输出电平与电源开关的OFF状态的协调，有助于恢复通过交流耦合损失的直流电平。 传感器与开关本身的协调减少了直流偏移和漂移，并允许交流耦合，从而消除了直流共模，并增加了一次电流传感器的灵活性，而不会增加复杂性。 可以组合多个这样的传感器以根据Kirchoff的电流法间接地测量来自多个开关的负载电流。
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公开(公告)号：US09634863B2
公开(公告)日：2017-04-25
申请号：US13294236
申请日：2011-11-11
CPC分类号： H04L12/4625 , H04L12/66 , H04L69/163 , H04L69/18 , H04L69/22
摘要： Systems and methods of supporting communications over a common network connection in a master-slave field bus network with a first type of packet formatted with a time-sensitive protocol and a second type of packet formatted with a non-time-sensitive protocol are provided. The slave devices are configured with filters to prevent the first type of packet from reaching a configurator and the second type from reaching a master device. The slave devices are also configured with arbitration logic so that the packets formatted with the time-sensitive protocol are provided with a priority over the packets formatted with the non-time-sensitive protocol.
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公开(公告)号：US20130049668A1
公开(公告)日：2013-02-28
申请号：US13214500
申请日：2011-08-22
申请人： George B. Yundt , Robert Pearce
发明人： George B. Yundt , Robert Pearce
CPC分类号： H02J1/10 , Y10T307/383
摘要： A decentralized motor drive arrangement provides high-voltage operational power and low-voltage standby power from a centralized distribution unit to remote motor drives using the same pair of interconnection power wires. The distribution unit includes a low-voltage power source which has one output terminal diode coupled to one of the output terminals of a high-voltage power source to form one output wire of the distribution unit. The other output terminals of the low-voltage and high-voltage power sources are directly coupled to form the other distribution unit outgoing power wire.
摘要翻译： 分散的电动机驱动装置使用相同的一对互连电源线将集中式配电单元的高压运行功率和低压待机功率提供给远程电机驱动。 分配单元包括低压电源，其具有耦合到高压电源的输出端之一的一个输出端二极管，以形成分配单元的一个输出线。 低压和高压电源的其他输出端子直接耦合，形成另一个分配单元输出电源线。
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