Method for removing lead from cement burning furnace
    1.
    发明授权
    Method for removing lead from cement burning furnace 有权
    从水泥燃烧炉中除铅的方法

    公开(公告)号:US07837963B2

    公开(公告)日:2010-11-23

    申请号:US12446966

    申请日:2007-10-19

    IPC分类号: B01D53/64

    摘要: A method to efficiently reduce lead content of cement without exerting influence upon quality of the cement. The method comprises the steps of: controlling O2 concentration of combustion gas in an inlet end of a cement kiln to 5% or lower and/or CO concentration thereof 1000 ppm or more; extracting a part of combustion gas from the cement kiln and collecting dust contained in the combustion gas; and collecting lead from the dust collected. With this, the area where raw material temperature in the cement kiln is between 800° and 1100° can be turned into reducing atmosphere to sharply increase volatilization rate of lead, and collection of lead from the dust allows lead content of cement to efficiently be reduced without exerting influence upon quality of the cement.

    摘要翻译: 一种有效降低水泥铅含量而不影响水泥质量的方法。 该方法包括以下步骤:将水泥窑入口端的燃烧气体的O 2浓度控制在5%以下,和/或其CO浓度为1000ppm以上; 从水泥窑中提取一部分燃烧气体并收集燃烧气体中含有的灰尘; 并从收集的灰尘中收集铅。 因此,水泥窑的原料温度在800°〜1100°之间的区域可以转化为还原气氛,从而大大提高铅的挥发率,从灰尘中收集铅可以有效降低水泥的铅含量 而不影响水泥的质量。

    METHOD FOR REMOVING LEAD FROM CEMENT BURNING FURNACE
    2.
    发明申请
    METHOD FOR REMOVING LEAD FROM CEMENT BURNING FURNACE 有权
    从水泥中除去铅的方法

    公开(公告)号:US20090304565A1

    公开(公告)日:2009-12-10

    申请号:US12446966

    申请日:2007-10-19

    IPC分类号: B01D53/64

    摘要: A method to efficiently reduce lead content of cement without exerting influence upon quality of the cement. The method comprises the steps of: controlling O2 concentration of combustion gas in an inlet end of a cement kiln to 5% or lower and/or CO concentration thereof 1000 ppm or more; extracting a part of combustion gas from the cement kiln and collecting dust contained in the combustion gas; and collecting lead from the dust collected. With this, the area where raw material temperature in the cement kiln is between 800° and 1100° can be turned into reducing atmosphere to sharply increase volatilization rate of lead, and collection of lead from the dust allows lead content of cement to efficiently be reduced without exerting influence upon quality of the cement. Together with the control described above, where the inner diameter of the cement kiln is D and the distance from the inlet end of the cement kiln longitudinally into the kiln is L, supplying fuel and/or raw material including inflammable material to the area where L/D of the cement kiln is 0 or more and 12 or lower causes securely maintaining the reducing atmosphere of the area.

    摘要翻译: 一种有效降低水泥铅含量而不影响水泥质量的方法。 该方法包括以下步骤:将水泥窑入口端的燃烧气体的O 2浓度控制在5%以下,和/或其CO浓度为1000ppm以上; 从水泥窑中提取一部分燃烧气体并收集燃烧气体中含有的灰尘; 并从收集的灰尘中收集铅。 因此,水泥窑的原料温度在800°〜1100°之间的区域可以转化为还原气氛,从而大大提高铅的挥发率,从灰尘中收集铅可以有效降低水泥的铅含量 而不影响水泥的质量。 连同上述控制,其中水泥窑的内径为D,水泥窑的入口端纵向进入窑的距离为L,将包括可燃材料的燃料和/或原料供应到L / D为0以上且12以下的原因可靠地维持该区域的还原气氛。

    Spindle drive system of machine tool
    3.
    发明授权
    Spindle drive system of machine tool 失效
    机床主轴驱动系统

    公开(公告)号:US5079490A

    公开(公告)日:1992-01-07

    申请号:US581954

    申请日:1990-09-13

    摘要: A spindle drive system of a machine tool, wherein a control mode changeover section of a control unit selects one of both a speed control mode for controlling a rotational speed of a spindle through negative feedback of the rotational speed of the spindle and a position control mode for controlling a rotational position of the spindle through negative feedback of the rotational position of the spindle, and a gain changeover section changes speed loop and position loop gains to a greater value during cutting operation than during non-cutting rapid feed operation when the position control mode has been selected.

    Control apparatus suitable for use in induction motor
    5.
    发明授权
    Control apparatus suitable for use in induction motor 失效
    适用于感应电动机的控制装置

    公开(公告)号:US5196778A

    公开(公告)日:1993-03-23

    申请号:US804476

    申请日:1991-12-09

    IPC分类号: G05B19/19

    摘要: A gain change-over switch according to the present invention serves to change over at least one of a current loop gain and a velocity loop gain to a value of the gain greater than that in other modes, in the case where a rotational-position control mode is selected as a control mode of the induction motor out of a rotational-speed control mode and a rotational-position control mode or where the rotational-position control mode is chosen and at the same time, a work mode for driving a work piece to work the same is selected, whereby an induction motor is controlled with high accuracy. Further, an exciting change-over switch according to the present invention serves to select a reinforcement exciting circuit for producing the secondary flux in the induction motor, which is greater than that produced by a weakening variable exciting circuit, only in the case where the rotational-position control mode and in the work mode are selected, thereby to control the induction motor with high accuracy. In other modes, the change-over switch serves to select the weakening variable exciting circuit for variably controlling the excitation-component of the primary current to produce the secondary flux corresponding to a torque component developed by the primary current.

    摘要翻译: 根据本发明的增益转换开关用于将电流环路增益和速度环路增益中的至少一个改变为大于其他模式的增益值,在旋转位置控制 模式作为感应电动机的控制模式从旋转速度控制模式和旋转位置控制模式中选择,或者选择旋转位置控制模式,同时选择用于驱动工件的工作模式 选择相同的工作,由此感应电动机以高精度被控制。 此外,根据本发明的激励转换开关用于选择用于在感应电动机中产生次级磁通的增强激励电路,其大于由弱化可变激励电路产生的二次磁通,仅在旋转 选择位置控制模式和工作模式,从而高精度地控制感应电动机。 在其他模式中,转换开关用于选择用于可变地控制初级电流的激励分量的弱化可变激励电路,以产生对应于由初级电流产生的转矩分量的二次通量。

    Method of controlling vectors in motor and vector-controlling inverter
device
    6.
    发明授权
    Method of controlling vectors in motor and vector-controlling inverter device 失效
    控制电机矢量控制方法及矢量控制逆变装置

    公开(公告)号:US5747957A

    公开(公告)日:1998-05-05

    申请号:US743662

    申请日:1996-11-05

    CPC分类号: H02P21/36 H02P21/22

    摘要: In a vector control method for controlling a motor by detecting a primary current in a motor driven by an inverter circuit with an electric current detector, dividing the primary current detection value detected by the electric current detector to a current-for-torque detection value and a detected current-for-excitation detection value, and thus dividing a primary current instruction value to a current-for-torque instruction value and a current-for-excitation value, a portion between the current-for-torque detection value and current-for-excitation detection value each obtained from the primary current detection value is changed by an Iq gain circuit (gain Kqc) and an Id gain circuit (gain Kd), which are discrete circuits, and the rated torque characteristics of the motor is changed according to change of the apportion.

    摘要翻译: 在通过利用电流检测器检测由逆变器电路驱动的电动机中的初级电流来控制电动机的矢量控制方法中,将由电流检测器检测出的一次电流检测值除以转矩电流检测值,以及 检测到的励磁电流检测值,从而将初级电流指令值除以转矩指令值和励磁电流值,转矩电流检测值与电流转换检测值之间的部分, 通过作为离散电路的Iq增益电路(增益Kqc)和Id增益电路(增益Kd)来改变从初级电流检测值获得的励磁检测值,并且电动机的额定转矩特性根据 改变分配。

    Inverter control method and apparatus
    7.
    发明授权
    Inverter control method and apparatus 失效
    逆变器控制方法及装置

    公开(公告)号:US5744927A

    公开(公告)日:1998-04-28

    申请号:US374873

    申请日:1995-01-19

    CPC分类号: H02P21/0003

    摘要: An inverter control apparatus and method for a motor driven by an inverter circuit. The primary current of the motor is detected by a detector circuit and is used in combination with a primary current command value to provide pulse-width modulation of the inverter circuit. The inverter is controlled by a switching circuit that can change the PWM frequency based on any one or more factors, including motor speed, motor speed or position control mode, equivalent load factor and detected temperature.

    摘要翻译: 一种用于由逆变器电路驱动的电动机的逆变器控制装置和方法。 电动机的初级电流由检测器电路检测,并与初级电流指令值组合使用以提供逆变器电路的脉冲宽度调制。 逆变器由一个开关电路控制,可以根据电机速度,电机速度或位置控制模式,等效负载因子和检测温度等任何一个或多个因素改变PWM频率。

    Positioning indexing control device for inverter apparatus
    8.
    发明授权
    Positioning indexing control device for inverter apparatus 失效
    变频器设备定位分度控制装置

    公开(公告)号:US4687978A

    公开(公告)日:1987-08-18

    申请号:US788213

    申请日:1985-10-16

    IPC分类号: H02P27/06 G05B19/23 G05B11/28

    摘要: A positioning-indexing device for an inverter apparatus provided with an indexing command control circuit for making positioning and indexing control of an inverter apparatus with an induction motor connected thereto as a load adapted, upon receipt of an indexing command after the rotation of the motor has been stopped at a specific position, to read a new command for stopping at any other specific position and to allow the spindle of the motor to stop at the aimed stop position with its rigidity maintained, within one rotation thereof, and without presenting such phenomena as damped oscillation about the aimed stop position.

    摘要翻译: 一种用于逆变器装置的定位分度装置,其具有分度指令控制电路,用于使连接有感应电动机的逆变器装置的定位和分度控制作为负载适应于在电动机旋转之后接收到分度指令时 在特定位置停止,读取新的命令以停止在任何其他特定位置,并允许电动机的主轴停止在目标停止位置,其刚度保持在其一个旋转中,并且不呈现这样的现象 阻止关于目标停止位置的振荡。