Method for improving sensorless flow rate estimation accuracy of pump driven with frequency converter
    43.
    发明授权
    Method for improving sensorless flow rate estimation accuracy of pump driven with frequency converter 有权
    用变频器提高泵无传感器流量估计精度的方法

    公开(公告)号:US09587640B2

    公开(公告)日:2017-03-07

    申请号:US13408823

    申请日:2012-02-29

    CPC classification number: F04D15/0088 G01F1/80 G01F25/003

    Abstract: An exemplary method for determining a flow rate of a pump, includes measuring and storing the flow rate (QMean) when the pump is in operation, storing rotational speed (nMean) and torque (TMean) of the pump during measurement of the flow rate (QMean), determining torque (TManufacturer) corresponding to the measured flow rate (QMean), calculating a bias value of the torque (TBias) by comparing the torque determined from the characteristic curve (TManufacturer) and the stored torque (TMean) of the pump, and determining an operating point of the pump based on the bias value of the torque (TBias).

    Abstract translation: 用于确定泵的流量的示例性方法包括在泵运行时测量和存储流量(QMean),在流量测量期间存储泵的转速(nMean)和扭矩(TMean) 通过比较从特性曲线(TManufacturer)确定的扭矩和泵的存储扭矩(TMean)来计算与所测量的流量(QMean)相对应的扭矩(TManufacturer),计算扭矩偏差值(TBias) ,并且基于扭矩的偏置值(TBias)来确定泵的工作点。

    Arrangement and method for a power semiconductor switch
    44.
    发明授权
    Arrangement and method for a power semiconductor switch 有权
    功率半导体开关的布置和方法

    公开(公告)号:US09584113B2

    公开(公告)日:2017-02-28

    申请号:US14705280

    申请日:2015-05-06

    Abstract: An exemplary arrangement and method for a power semiconductor switch, where a first current between a first electrode and a second electrode can be controlled based on a control voltage between a third electrode and the first electrode. The arrangement includes an inductance connected in series with the power semiconductor switch, wherein a first end of the inductance is connected to the first electrode, first measuring source for generating a first measurement voltage based on the first end's voltage with respect to a reference potential, second measuring source for generating a second measurement voltage on the basis of the inductance's second end voltage with respect to the reference potential, a comparator for comparing the first measurement voltage with the second measurement voltage, and driver for generating the control voltage. The driver being configured to generate a first control voltage level and a second voltage level of the control voltage.

    Abstract translation: 功率半导体开关的示例性布置和方法,其中可以基于第三电极和第一电极之间的控制电压来控制第一电极和第二电极之间的第一电流。 该装置包括与功率半导体开关串联的电感,其中电感的第一端连接到第一电极,第一测量源,用于基于相对于参考电位的第一端的电压产生第一测量电压, 第二测量源,用于基于相对于参考电位的电感的第二端电压产生第二测量电压;比较器,用于将第一测量电压与第二测量电压进行比较;以及用于产生控制电压的驱动器。 驱动器被配置为产生控制电压的第一控制电压电平和第二电压电平。

    Synchronizing an inverter with an alternating voltage source
    45.
    发明授权
    Synchronizing an inverter with an alternating voltage source 有权
    逆变器与交流电压源同步

    公开(公告)号:US09571023B2

    公开(公告)日:2017-02-14

    申请号:US12694918

    申请日:2010-01-27

    Applicant: Mikko Vertanen

    Inventor: Mikko Vertanen

    CPC classification number: H02P9/102 H02P21/22

    Abstract: A method and device are disclosed for synchronizing an inverter with an alternating voltage source. The method includes measuring a current generated by the alternating voltage source and flowing through diodes of the inverter, determining a phase angle and angular velocity relating to the alternating voltage source from the measured current for enabling synchronization between the inverter and the alternating voltage source, and starting modulation of the inverter according to the obtained phase angle and angular velocity.

    Abstract translation: 公开了用于使逆变器与交流电压源同步的方法和装置。 该方法包括测量由交流电压源产生并流过逆变器的二极管的电流,根据测量的电流确定与交流电压源相关的相位角和角速度,以实现逆变器和交流电压源之间的同步;以及 根据获得的相位角和角速度启动逆变器的调制。

    Method and arrangement for operating a pump
    47.
    发明授权
    Method and arrangement for operating a pump 有权
    操作泵的方法和装置

    公开(公告)号:US09419556B2

    公开(公告)日:2016-08-16

    申请号:US14498099

    申请日:2014-09-26

    Applicant: ABB OY

    CPC classification number: H02P27/047 F04D13/06 F04D15/0088 H02P29/026

    Abstract: A method and arrangement for operating a pump system are disclosed, the pump system including a pump arranged to be rotated with an AC motor, an inverter, the output of which is electrically connected to the AC motor, and a photovoltaic panel system electrically connected to feed DC power to the inverter. The method can include setting a voltage limit, and determining continuously voltage obtained from the photovoltaic panel system. When the determined voltage of the photovoltaic panel system is below the set voltage limit, frequency of the inverter can be controlled such that the ratio between output voltage of the inverter and the output frequency is substantially constant. When the determined voltage of the photovoltaic panel system exceeds the voltage limit, the inverter frequency can be controlled for keeping voltage of the photovoltaic panel system substantially at the voltage limit.

    Abstract translation: 公开了一种用于操作泵系统的方法和装置,所述泵系统包括布置成与AC马达一起旋转的泵,其输出电连接到AC马达的逆变器,以及电连接到 为变频器馈送直流电源。 该方法可以包括设置电压限制,以及确定从光伏面板系统获得的连续电压。 当光伏面板系统的确定电压低于设定电压极限时,可以控制逆变器的频率,使得逆变器的输出电压与输出频率之间的比率基本上是恒定的。 当光伏面板系统的确定电压超过电压极限时,可以控制逆变器频率以保持光伏面板系统的电压基本上处于电压极限。

    Method and apparatus for estimating rotor angle and rotor speed of synchronous reluctance motor at start-up
    48.
    发明授权
    Method and apparatus for estimating rotor angle and rotor speed of synchronous reluctance motor at start-up 有权
    用于估算启动时同步磁阻电机的转子角和转子转速的方法和装置

    公开(公告)号:US09294029B2

    公开(公告)日:2016-03-22

    申请号:US13401081

    申请日:2012-02-21

    Applicant: Matti Veijanen

    Inventor: Matti Veijanen

    CPC classification number: H02P21/13 H02P21/141 H02P21/18 H02P21/28

    Abstract: A method of estimating a rotor angle of a synchronous reluctance motor, which includes a stator and a rotor. First, a stator flux and a stator current are determined. Two orthogonal stator flux components in a stator reference frame are calculated from the stator flux. Two orthogonal stator current components in the stator reference frame are calculated from the stator current. A rotor orientation vector is then calculated using a known rotor direct or quadrature axis inductance component, the stator flux components, and the stator current components. The rotor orientation is estimated on the basis of the rotor orientation vector.

    Abstract translation: 一种估计包括定子和转子的同步磁阻电机的转子角度的方法。 首先,确定定子磁通和定子电流。 从定子磁通量计算定子参考系中的两个正交定子磁通分量。 从定子电流计算定子参考系中的两个正交定子电流分量。 然后使用已知的转子直接或正交轴电感分量,定子磁通分量和定子电流分量来计算转子取向向量。 基于转子方向矢量来估计转子取向。

    Method and apparatus for monitoring air filter condition
    49.
    发明授权
    Method and apparatus for monitoring air filter condition 有权
    监测空气过滤器状况的方法和装置

    公开(公告)号:US09200995B2

    公开(公告)日:2015-12-01

    申请号:US13749403

    申请日:2013-01-24

    Applicant: ABB Oy

    Abstract: A method and apparatus are disclosed for monitoring accumulation of dirt on an air filter of a ventilation system including the filter and a fan controlled by a frequency converter. An initial value for an operating parameter is determined. A present operating point is determined based on a characteristic curves, and the mechanical power and rotational speed of the fan. A present value for the operating parameter is determined based on the present operating point, and accumulation of dirt is determined on the air filter based on the initial and present values of the operating parameter.

    Abstract translation: 公开了一种用于监测包括过滤器和通过变频器控制的风扇的通风系统的空气过滤器上的污垢累积的方法和装置。 确定操作参数的初始值。 基于特性曲线以及风扇的机械功率和转速确定当前工作点。 基于当前工作点确定操作参数的当前值,并且基于操作参数的初始值和当前值在空气过滤器上确定污垢的累积。

    Method of controlling an IGBT and a gate driver
    50.
    发明授权
    Method of controlling an IGBT and a gate driver 有权
    控制IGBT和栅极驱动器的方法

    公开(公告)号:US09154125B2

    公开(公告)日:2015-10-06

    申请号:US12699369

    申请日:2010-02-03

    Applicant: Leo Nuutinen

    Inventor: Leo Nuutinen

    CPC classification number: H03K17/166 H03K17/0828 H03K17/168

    Abstract: A method is disclosed for controlling an IGBT component and a gate driver. An exemplary method includes producing, with two separate driver circuits, a gate voltage for controlling the IGBT component, the outputs of the driver circuits being connected to free ends of a series connection of resistive components. A location, such as a midpoint between the series connection, forms the gate voltage.

    Abstract translation: 公开了一种用于控制IGBT部件和栅极驱动器的方法。 示例性方法包括通过两个单独的驱动器电路产生用于控制IGBT部件的栅极电压,驱动电路的输出连接到电阻部件的串联连接的自由端。 诸如串联连接之间的中点的位置形成栅极电压。

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