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    Method and apparatus for operating a plurality of motors with a single controller
    1.
    发明授权
    Method and apparatus for operating a plurality of motors with a single controller 失效
    用单个控制器操作多个电动机的方法和装置

    公开(公告)号：US6133699A

    公开(公告)日：2000-10-17

    申请号：US733532

    申请日：1996-10-18

    申请人： Nick G. Vrionis ,  Robert M. Russ ,  Dave Blau ,  Leland M. Farrer

    发明人： Nick G. Vrionis ,  Robert M. Russ ,  Dave Blau ,  Leland M. Farrer

    IPC分类号： H02P1/42 ,  H02P25/04 ,  G10D3/00

    CPC分类号： H02P1/42 ,  H02P25/04 ,  H02P2207/05

    摘要： A system for operating a plurality of motors with a single controller is disclosed. This system includes a first motor, a second motor that is matched to the first motor but has a lower power rating than the first motor and a controller electrically driving the first and second motors with a modulated voltage at one frequency selected from one or more frequencies over a complete range of frequencies. The controller generates a frequency of the modulated voltage from the range of frequencies which is proportional to the desired speed for the first and second motors. A method for building such a system is also disclosed. This system and method have particular application to HVAC systems.

    摘要翻译： 公开了一种用于使用单个控制器操作多个电动机的系统。 该系统包括第一电动机，与第一电动机匹配但具有比第一电动机低的额定功率的第二电动机，以及控制器，以从一个或多个频率选择的一个频率的调制电压来电驱动第一和第二电动机 在一个完整的频率范围内。 控制器从与第一和第二电动机的期望速度成比例的频率范围产生调制电压的频率。 还公开了一种用于构建这种系统的方法。 该系统和方法具有HVAC系统的特殊应用。

    Motor control apparatus
    2.
    发明授权
    Motor control apparatus 失效
    电机控制装置

    公开(公告)号：US5990640A

    公开(公告)日：1999-11-23

    申请号：US625002

    申请日：1996-03-29

    申请人： Patrick H. Dwyer ,  Leland M. Farrer ,  Martin Mason

    发明人： Patrick H. Dwyer ,  Leland M. Farrer ,  Martin Mason

    IPC分类号： H02P7/00 ,  H02K29/00

    CPC分类号： H02P7/04

    摘要： An H-Bridge motor controller having a floating, electrically isolated high side FET driver design where the motor driver circuity is electrically isolated from the logic circuitry. Back EMF generation during motor operation is minimized by employing a "fifth" power transistor to the H-Bridge that connects the motor coil to ground when the other transistors in the H-Bridge are turned off, so as to provide a direct path for the unused energy to be removed from the driver circuit without interfering with the normal switching of the FETs. Alternatively, back EMF generation is minimized by applying switching signals to the H-Bridge where, instead of turning the low side FET drivers between motor clocks, the low side FET drivers are both turned on during the "off time" period, so as to connect both ends of the motor coil to ground during the "off" period, thereby draining the coil of unused energy. The fifth power transistor also permits either one-half or the entire motor coil to be connected to the H-Bridge at the commencement of the energizing phase, thereby altering the inductive load seen by the H-Bridge upon motor energization. The motor controller also includes analog and digital circuits that automatically vary the voltage and/or current applied to the motor depending upon performance characteristics such as speed, electromagnetic characteristics and torque load.

    摘要翻译： 具有浮动的，电隔离的高侧FET驱动器设计的H桥电机控制器，其中电动机驱动器电路与逻辑电路电隔离。 通过在H桥中的其他晶体管被关闭时，将电机线圈接地的H桥采用“第五”功率晶体管，从而最大限度地减少电动机运行期间产生的EMF，从而为 未被驱动电路去除的能量，而不会妨碍FET的正常切换。 或者，通过向H桥施加开关信号来最小化反电动势产生，其中，在“关闭时间”期间，低侧FET驱动器不是在电动机时钟之间转动低侧FET驱动器，而是在“关闭”时间段期间打开， 在“关闭”期间将马达线圈的两端连接到地，从而排出未使用的能量的线圈。 在通电阶段开始时，第五功率晶体管还允许将一半或整个电动机线圈连接到H桥，从而在电动机通电时改变H桥看到的电感负载。 电动机控制器还包括根据诸如速度，电磁特性和转矩负载等性能特性自动改变施加到电动机的电压和/或电流的模拟和数字电路。

    Wireless communication system for adapting to frequency drift
    3.
    发明授权
    Wireless communication system for adapting to frequency drift 失效
    用于适应频率漂移的无线通信系统

    公开(公告)号：US5909640A

    公开(公告)日：1999-06-01

    申请号：US944832

    申请日：1997-10-06

    申请人： Leland M. Farrer ,  Joseph S. Chan ,  Robert F. Garry, Jr. ,  Charles A. Glorioso ,  Norman F. Krasner

    发明人： Leland M. Farrer ,  Joseph S. Chan ,  Robert F. Garry, Jr. ,  Charles A. Glorioso ,  Norman F. Krasner

    IPC分类号： H04B1/713 ,  H04B1/7136 ,  H04B7/12 ,  H04B1/54

    CPC分类号： H04B1/7136 ,  H04B1/713 ,  H04B7/12

    摘要： A wireless communication system with one or more remote transceivers for transmitting a wireless data signal at an actual frequency that is different than the expected frequency and a base transceiver that can automatically adjust to receive the actual frequency. Each remote transceiver is adapted to initiate a wireless data signal at a selected time that is unique to that remote transceiver. The expected frequency is sequentially pre-determined in a pseudo-random sequence with each remote transceiver having a unique sequence. The base transceiver can respond to the remote transceiver at the actual frequency. Both the remote transceiver and the base transceiver can convert the wireless signals in a single step to baseband.

    摘要翻译： 一种具有一个或多个远程收发器的无线通信系统，用于以不同于预期频率的实际频率发送无线数据信号，以及可以自动调整以接收实际频率的基本收发器。 每个远程收发器适于在该远程收发器唯一的选定时间发起无线数据信号。 预期频率在伪随机序列中依次预先确定，每个远程收发器具有唯一的序列。 基站收发器可以以实际频率响应远程收发器。 远程收发器和基本收发器都可以将单个步骤中的无线信号转换为基带。