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    • 4. 发明授权
    • Variable speed control apparatus for induction motor
    • 感应电动机变速控制装置
    • US4099108A
    • 1978-07-04
    • US716205
    • 1976-08-20
    • Tadashi OkawaYasuo MatsudaHiroshi HayashidaTakeo Maeda
    • Tadashi OkawaYasuo MatsudaHiroshi HayashidaTakeo Maeda
    • H02P27/06H02P5/40
    • H02P27/06H02P2201/03H02P27/047
    • An induction motor is operated by a power supply of variable voltage and variable frequency. The voltage and frequency of the variable-voltage variable-frequency power supply is changed by a control circuit to accelerate or decelerate the induction motor. For slowly controlling the speed of the induction motor, the ratio of the output voltage to the output frequency of the variable-voltage variable-frequency power supply is maintained substantially constant. The control circuit includes a voltage correcting means which, in response to a command for sudden acceleration or deceleration of the speed of the motor, corrects the output voltage of the power supply in accordance with the acceleration or deceleration rate and the prevailing magnitude of the output frequency of the variable-voltage variable-frequency power supply.
    • 感应电动机由可变电压和可变频率的电源操作。 可变电压可变频率电源的电压和频率由控制电路改变,以加速或减速感应电动机。 为了缓慢地控制感应电动机的速度,可变电压可变频率电源的输出电压与输出频率的比例保持基本恒定。 控制电路包括电压校正装置,响应于马达速度的突然加速或减速的命令,根据加速或减速率和输出的主要幅度来校正电源的输出电压 可变电压可变频率电源的频率。
    • 6. 发明授权
    • Magnetic rotary encoder
    • 磁力旋转编码器
    • US4418372A
    • 1983-11-29
    • US173842
    • 1980-07-30
    • Hiroshi HayashidaTadashi TakahashiKunio MiyashitaKanji Kawakami
    • Hiroshi HayashidaTadashi TakahashiKunio MiyashitaKanji Kawakami
    • G01D5/14G01D5/16G01D5/245G01P3/487G11B5/12G11B5/30
    • G01D5/145G01D5/2451G01P3/487
    • Disclosed is a magnetic rotary encoder used in combination with a rotary body having plural pieces of magnetic information recorded on at least one circumferentially running track. The rotary encoder comprises a substrate having a surface disposed opposite to the rotary body and at least one magnetoresistive element formed on the surface of the substrate. The magnetoresistive element is formed on the substrate surface as an integral pattern including at least two portions extending substantially in the radial direction of the rotary body in a relation opposite to the magnetic information recorded portion of the rotary body, two lead connection terminal portions formed at the outer ends of the radially extending portions respectively, and a circumferentially extending portion interconnecting the radially extending portions at their ends, so as to form a single electrical signal path which passes both of the radially extending portions and terminates in the two lead connection terminal portions. These lead connection terminal portions are disposed outside of the outer peripheral edge of the rotary body.
    • 公开了一种与旋转体组合使用的磁旋转编码器,其具有记录在至少一个周向运行的轨道上的多个磁信息。 旋转编码器包括具有与旋转体相对设置的表面的基板和形成在基板的表面上的至少一个磁阻元件。 磁阻元件作为整体图案形成在基板表面上,该整体图形包括至少两个基本上沿着旋转体的径向方向延伸的部分,其与旋转体的磁信息记录部分相反,两个引线连接端子部分形成在 径向延伸部分的外端以及在其端部互连径向延伸部分的周向延伸部分,以便形成通过两个径向延伸部分并终止在两个引线连接端子部分中的单个电信号路径 。 这些引线连接端子部设置在旋转体的外周边缘的外侧。
    • 9. 发明授权
    • Method and apparatus for counting an infinite length with a counter of
finite length
    • 用有限长度的计数器计数无限长的方法和装置
    • US4586152A
    • 1986-04-29
    • US483428
    • 1983-04-08
    • Hiroshi HayashidaKunio MiyashitaTadashi TakahashiShigeki MorinagaKosho Ishizaki
    • Hiroshi HayashidaKunio MiyashitaTadashi TakahashiShigeki MorinagaKosho Ishizaki
    • G06K15/16B41J11/42G05B19/29G06F3/12H03K23/66G06F1/02
    • G05B19/293B41J11/42G05B2219/34053G05B2219/34215
    • An endless counting apparatus comprises a first memory for storing a code of a first predetermined number of bits sufficient to represent the maximum value of each coded input expressed according to the binary notation, a second memory for storing an endless-making code of a second predetermined number of bits of higher order than and contiguous to the less and least significant bits stored in the first memory, and a control circuit for adding or subtracting the value of the coded input to or from the contents of the first and second memories depending on the input value to be counted and applying the result of addition or subtraction to the first and second memories. A method for endless counting by such an apparatus comprises clearing the most significant bit of the endless making code stored in the second memory when the code stored in the second memory has attained a value which causes an overflow due to a carry from the contents of the first memory if the carry occurs, and setting the most significant bit of the endless-making code stored in the second memory when the code stored in the second memory has attained a value which causes an underflow due to a borrow from the contents of the first memory if the borrow occurs.
    • 无限计数装置包括:第一存储器,用于存储足以表示根据二进制符号表示的每个编码输入的最大值的第一预定数量的位的代码;第二存储器,用于存储第二预定数量的循环制造代码 与存储在第一存储器中的较低和最低有效位相比较高且相邻的位的数量的位数,以及用于根据第一和第二存储器的内容向或从第一和第二存储器的内容添加或减去编码输入的值的控制电路 输入值进行计数,并将加法或减法的结果应用于第一和第二存储器。 一种用于通过这种装置进行无限次计数的方法包括:当存储在第二存储器中的代码达到一个值时,清除存储在第二存储器中的无限制代码的最高有效位,该值导致由于 第一存储器,如果进位发生,并且当存储在第二存储器中的代码已经达到导致由于从第一存储器的内容中的借用而导致下溢的值时,设置存储在第二存储器中的循环代码的最高有效位 记忆如果借用发生。
    • 10. 发明授权
    • Control system for brushless motor
    • 无刷电机控制系统
    • US3949283A
    • 1976-04-06
    • US443141
    • 1974-02-15
    • Toshiaki OkuyamaHiroyuki OkamotoTakamasa HoriHiroshi HayashidaMitsuyuki Honbu
    • Toshiaki OkuyamaHiroyuki OkamotoTakamasa HoriHiroshi HayashidaMitsuyuki Honbu
    • H02P6/20H02P25/02H02K29/00
    • H02P25/03
    • A control system for a brushless motor is disclosed which comprises an AC power supply, a rectifier circuit including controlled rectifier elements for converting the alternating current supplied by the AC power supply into a direct current, an inverter circuit including controlled rectifier elements for converting the direct current produced by the rectifier circuit into an alternating current, a motor driven by the inverter circuit and a position detector for detecting a signal representing rotational positions of the motor. The controlled rectifier elements of the inverter circuit are fired in predetermined sequence in response to detection signals from the position detector, while the DC output current of the rectifier is continually controlled at each commutation of the inverter circuit at low motor speeds. A predetermined number of signals in synchronism with each commutation of the inverter circuit are included in one cycle, so that the DC output current of the rectifier circuit is controlled for continual operation by the use of signals with different delay times behind the aforementioned signals concurrent with the commutation of the inverter.
    • 公开了一种用于无刷电动机的控制系统,其包括AC电源,包括用于将由AC电源提供的交流电转换成直流电的可控整流元件的整流器电路,包括可控整流元件的逆变器电路,用于将直流 由整流电路产生的交流电流,由逆变器电路驱动的电动机和用于检测表示电动机的旋转位置的信号的位置检测器。 逆变器电路的可控整流元件响应于来自位置检测器的检测信号以预定顺序被点火,同时整流器的直流输出电流在低电动机速度下在逆变器电路的每次换向下被连续地控制。 在一个周期中包括与逆变器电路的每次换向同步的预定数量的信号,从而通过使用具有与上述信号同时的不同延迟时间的信号来控制整流电路的直流输出电流以进行连续操作 逆变器的换向。