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    • 4. 发明授权
    • Digital speed controller using a single-chip microcontroller
    • 使用单片微控制器的数字调速控制器
    • US4845608A
    • 1989-07-04
    • US135961
    • 1987-12-21
    • Michael Gdula
    • Michael Gdula
    • H02P23/00
    • H02P23/22Y10S388/912Y10S388/933
    • A speed regulator digital speed controller for rotating machinery is comprised of a single-chip microcontroller operating in conjunction with a multiple counter/time peripheral, and is programmed in a high level language. Pulses are generated by a digital speed sensor at a rate too low to give the required speed resolution; these pulses are counted and a preset number toggles a binary gate signal. Two clock counters both having an input connected to a high reference frequency oscillator are gated alternately and accumulate a count depending on the length of the gated on interval. These speed related counts are read during alternating gated off intervals into the microcontroller where the speed error is calculated in real time to a high degree of accuracy and resolution. The speed of an electric motor and a steam turbine, for instance, are regulated.
    • 用于旋转机械的速度调节器数字速度控制器包括与多个计数器/时间外设结合使用的单片微控制器,并以高级语言编程。 脉冲由数字速度传感器以太低的速率产生,无法提供所需的速度分辨率; 这些脉冲被计数,并且预设的数字切换二进制门信号。 具有连接到高参考频率振荡器的输入的两个时钟计​​数器交替地选通,并且根据门控的间隔的长度累积计数。 这些速度相关计数在交替的选通间隔期间被读取到微控制器中,其中速度误差被实时计算到高精度和分辨率。 例如,电动机和蒸汽轮机的速度被调节。
    • 7. 发明授权
    • Polyphase reference generator
    • 多相参考发生器
    • US4327420A
    • 1982-04-27
    • US164259
    • 1980-06-30
    • Michael GdulaRaymond J. HodsollEdwin C. Underkoffler
    • Michael GdulaRaymond J. HodsollEdwin C. Underkoffler
    • G06F1/03H02M1/084H03B27/00G06F15/31H03B19/00
    • H02M1/0845G06F1/0342
    • A reference generator, providing a plurality of precisely-phased output signals, utilizes a microprocessor having a table of values for the output waveforms stored in a read-only memory thereof. The table entries include a multiplicity of values for providing a stepwise representation of each of the desired waveforms, which may have constant angular increments therebetween. The incremental tabular values are consecutively read responsive to the count in a timer, integral in the microcomputer, which is sequentially advanced by the pulse output of a voltage-to-frequency converter receiving a rate signal. The tabular values are converted to analog polyphase reference signals by a like number, equal to the number of phases, of digital-to-analog converters and associated low-pass filters. The output waveform peak amplitude is established by a dual-polarity reference voltage generator, responsive to a variable level signal. Essentially instantaneous reversal of the polyphase waveforms is provided by "angle complement" control of the present point utilized within the tables. The timer circuit provides steps of increasing size through the lookup-table to provide a gradual degradation in the number of steps in the output waveform when the rate signal exceeds the microcomputer execution speed upper limit.
    • 提供多个精确定相输出信号的参考发生器利用存储在其只读存储器中的输出波形具有值表的微处理器。 表条目包括用于提供每个期望波形的逐步表示的多个值,其可以在它们之间具有恒定的角增量。 响应于微计算机中积分的定时器中的计数连续读取增量表格值,该计数器通过接收速率信号的电压 - 频率转换器的脉冲输出而顺序地提前。 表格值通过等于数模转换器和相关联的低通滤波器的相位数的相同数字转换为模拟多相参考信号。 输出波形峰值振幅由双极性参考电压发生器建立,响应于可变电平信号。 多相波形的基本瞬时反转由表内所使用的当前点的“角度补偿”控制提供。 定时器电路提供通过查找表增加尺寸的步骤,以便当速率信号超过微型计算机执行速度上限时提供输出波形中的步数的逐渐劣化。