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    • 6. 发明授权
    • Combination microprocessor and discrete element control system for a
clock rate controlled electronically commutated motor
    • 用于时钟速率控制的电子换向电机的组合微处理器和离散元件控制系统
    • US4250544A
    • 1981-02-10
    • US109586
    • 1980-01-04
    • Robert P. Alley
    • Robert P. Alley
    • H02P6/08H02P23/00G06F15/46H02P6/02
    • H02P6/085H02P23/22
    • A motor velocity control system employing feedback to maintain actual motor rotational velocity at or near a desired rotational velocity implements a clock rate control motor rotational velocity system by advantageously apportioning the required functions between a relatively small, slow speed microprocessor, and a plurality of discrete circuit elements in the form of analog and digital logic devices. The microprocessor serves the following four general functions: (1) as a "basic clock" timer of variable rate to set up motor speed; (2) as a relatively slow speed determiner of when various components are to be switched for commutation, and for indicting to an integrator circuit which motor winding is currently unenergized and which therefore may be sampled for determining rotor actual position; (3) as a digital feed to a digital to analog (D/A) converter for setting a motor winding current limit; in accordance with the principles of the Alley; and (4) as a communication link to receive velocity and direction commands, preferably in the form of a plurality of points defining a waveform profile or envelope. Discrete analog and digital logic elements are employed to implement the functions of analog integration and comparison with the integral limit, as well as current comparison and chopper control.
    • 采用反馈来维持实际电动机旋转速度处于或接近所需旋转速度的电动机速度控制系统通过有利地在相对较小的低速微处理器和多个离散电路之间分配所需功能来实现时钟速率控制电动机旋转速度系统 元素以模拟和数字逻辑器件的形式。 微处理器具有以下四个一般功能:(1)作为可变速率的“基本时钟”定时器设置电机速度; (2)作为要切换各种部件以进行换向的相对慢的速度确定器,并且用于指示电动机绕组当前未被通电并且因此可以被采样以用于确定转子实际位置的积分器电路; (3)作为用于设置电动机绕组电流限制的数模转换器(D / A)转换器的数字馈送; 按照胡同的原则; 和(4)作为用于接收速度和方向命令的通信链路,优选地以定义波形轮廓或包络的多个点的形式。 采用离散模拟和数字逻辑元件来实现模拟积分和与积分极限相比较的功能,以及电流比较和斩波控制。
    • 8. 发明授权
    • Flicker eliminating intensity controller for discharge lamp dimming
circuit
    • 闪烁消除强度控制器,用于放电灯调光电路
    • US4096413A
    • 1978-06-20
    • US659665
    • 1976-02-20
    • Robert P. Alley
    • Robert P. Alley
    • H05B41/392
    • H05B41/3924Y10S315/04
    • To solve a flicker problem in a discharge lamp dimming system which results from non-synchronous high frequency, substantially sinusoidal perturbation signals imposed upon the AC line, the intensity control section of the circuit is modified. In one form of the preferred embodiment, a secondary winding of the input transformer is spaced apart from the primary winding thereof to increase the leakage reactance of the secondary winding and to decrease the capacitive coupling between windings. A capacitance of suitable value is connected across the output of the secondary winding thereby allowing the combination to serve as a low pass filter to block the line perturbation signals. In another form of the preferred embodiment, a differentiator-limiter-integrator network is included in circuit to provide a non-perturbed zero-crossing for the firing circuit, ie, the intensity controller, thereby to eliminate flicker.
    • 为了解决由非同步高频产生的放电灯调光系统中的闪烁问题,施加在AC线上的基本上正弦的扰动信号,修改了电路的强度控制部分。 在优选实施例的一种形式中,输入变压器的次级绕组与初级绕组间隔开以增加次级绕组的漏电抗并减小绕组之间的电容耦合。 适当值的电容连接在次级绕组的输出端,从而允许该组合用作低通滤波器以阻挡线路扰动信号。 在优选实施例的另一形式中,电路中包括微分器 - 限幅器 - 积分器网络,以为击发电路即强度控制器提供非扰动的零交叉,从而消除闪烁。
    • 10. 发明授权
    • Microprocessor-based protective relay system
    • 基于微处理器的保护继电器系统
    • US5057962A
    • 1991-10-15
    • US468320
    • 1990-01-22
    • Robert P. AlleyWilliam H. Bicknell
    • Robert P. AlleyWilliam H. Bicknell
    • H01H9/54H02H6/00
    • H02H6/005H02H3/083H02H3/16H02H5/04H01H9/542
    • A microprocessor-based relay system is used in combination with relay contactors and a control circuit therefor to protect an electric motor from overload currents in addition to phase faults, ground faults, load losses, and load jams. The microprocessor is provided with a data base comprising thermal characteristics of the motor during heating and cooling. The heating data comprise current versus time curves stored as a look-up table for which each data point represents a thermal limit, i.e., the maximum time the motor is permitted to operate at a particular current level. The cooling data comprise motor cooling rates. Phase currents are sampled at preselected fixed time intervals during a predetermined period thereof, and an average motor current value is calculated therefrom. A thermal sum, which is initialized at zero upon first starting the motor, is adjusted depending on the average motor current value relative to a predetermined overload current value. The average motor current value is used as an index to the heating curve look-up table. If the thermal sum exceeds the corresponding thermal limit in the look-up table for a predetermined time interval, then an overload condition is indicated, and the relay is tripped.
    • 与继电器接触器及其控制电路组合使用的基于微处理器的继电器系统除了相位故障,接地故障,负载损耗和负载卡纸之外,还可以保护电动机免受过载电流的影响。 在加热和冷却期间,微处理器设置有包括电机的热特性的数据库。 加热数据包括作为查找表存储的电流对时间曲线,其中每个数据点表示热限制,即允许电动机在特定电流水平下操作的最大时间。 冷却数据包括电机冷却速率。 在其预定期间以预选的固定时间间隔对相电流进行采样,并从其计算平均电动机电流值。 在首次启动电动机时初始化为零的热和根据相对于预定过载电流值的平均电动机电流值进行调整。 平均电机电流值用作加热曲线查找表的指标。 如果预定时间间隔内的热和超过查找表中相应的热限制,则指示过载状态,并且继电器跳闸。