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    • 11. 发明授权
    • Method and apparatus for estimating induction motor rotor temperature
    • 估计感应电动机转子温度的方法和装置
    • US07769552B2
    • 2010-08-03
    • US12268819
    • 2008-11-11
    • Roy S. ColbyZhi GaoLarry A. Turner
    • Roy S. ColbyZhi GaoLarry A. Turner
    • G01R27/00H02P23/00
    • H02P29/66H02P21/16H02P23/14H02P2207/01
    • A method and apparatus to provide continuous and reliable rotor temperature estimates for line-connected induction motors during steady-state and/or dynamic motor operations. Rotor temperature is calculated from voltage and current measurements without any temperature or speed sensors. First, complex space vectors are synthesized from voltage and current measurements. Second, the instantaneous rotor speed is detected by calculating the rotational speed of a single rotor slot harmonic component with respect to the rotational speed of the fundamental frequency component. Third, the positive sequence fundamental frequency components are extracted from complex space vectors. Fourth, the rotor time constant is estimated in a model-reference adaptive system based on a dynamic induction motor equivalent circuit model. Finally, the rotor temperature is calculated according to the linear relationship between the rotor temperature and the estimated rotor time constant. Real-time induction motor thermal protection is achieved through this continuous tracking of the rotor temperature.
    • 一种用于在稳态和/或动态电动机操作期间为线路连接的感应电动机提供连续且可靠的转子温度估计的方法和装置。 转子温度由没有任何温度或速度传感器的电压和电流测量计算。 首先,从电压和电流测量中合成复杂的空间矢量。 第二,通过计算单个转子槽谐波分量相对于基频分量的转速的转速来检测瞬时转子速度。 第三,从复杂的空间矢量中提取正序基频分量。 第四,基于动态感应电动机等效电路模型的模型参考自适应系统中估计转子时间常数。 最后,转子温度根据转子温度与转子时间常数之间的线性关系来计算。 通过对转子温度的连续跟踪,可实现实时感应电动机的热保护。
    • 12. 发明申请
    • METHODS AND APPARATUS FOR ESTIMATING ROTOR SLOTS
    • 评估转子水平的方法和装置
    • US20090287463A1
    • 2009-11-19
    • US12268800
    • 2008-11-11
    • Larry A. TurnerRoy S. ColbyZhi Gao
    • Larry A. TurnerRoy S. ColbyZhi Gao
    • G06F7/60
    • H02P23/14G01R31/343
    • A method of determining a quantity of rotor slots in an induction motor through analysis of voltage and current signals. An approximate slip is calculated according to an approximate slip function that is independent of a rotor slots quantity. A fundamental frequency is calculated from a representation of the voltage signal. A saliency frequency is calculated from a representation of the current signal. For each rotor slots index in a set of rotor slots indices, a slip estimate is calculated according to a slip estimation function that includes the saliency frequency, a saliency order, the fundamental frequency, a rotor slots index in the set of rotor slots indices, and a quantity of poles of the motor, such that the slip estimate is evaluated at respective ones of the set rotor slots indices. A slip estimation error signal is calculated according to a slip estimation error function that includes a difference between the approximate slip and respective ones of the slip estimates. A rotor slots performance surface representative of an aggregate of the slip estimation error signals evaluated over the set of the rotor slots indices is calculated. A rotor slots quantity equal to the rotor slots index corresponding to a minimum of the rotor slots performance surface over at least a portion of the set of the rotor slots indices is defined.
    • 一种通过分析电压和电流信号来确定感应电机中转子槽数量的方法。 根据与转子槽数无关的近似滑移函数计算出近似滑差。 根据电压信号的表示计算基频。 根据当前信号的表示计算显着频率。 对于一组转子槽索引中的每个转子槽索引,根据包括突出频率,凸极顺序,基频,转子槽索引组中的转子槽索引的滑移估计函数来计算滑差估计, 以及马达的极数,使得在各个设定的转子槽索引中评估滑移估计。 根据滑差估计误差函数计算滑差估计误差信号,该误差估计误差函数包括近似滑差和滑差估计值中的相应滑差之差。 计算代表在转子槽索引的集合上评估的滑移估计误差信号的集合的转子槽性能表面。 限定了与转子槽索引的至少一部分上的转子槽性能表面的最小值相对应的等于转子槽索引的转子槽数量。
    • 14. 发明申请
    • METHOD AND APPARATUS FOR ESTIMATING INDUCTION MOTOR ELECTRICAL PARAMETERS
    • 用于估计电感电机参数的方法和装置
    • US20090284211A1
    • 2009-11-19
    • US12268831
    • 2008-11-11
    • Zhi GaoLarry A. TurnerRoy S. Colby
    • Zhi GaoLarry A. TurnerRoy S. Colby
    • H02P23/14
    • H02P23/14G01R31/343H02P2207/01
    • A method and apparatus to provide estimates of electrical parameters for line-connected induction motors during either steady-state or dynamic motor operations. The electrical parameters are calculated from the motor nameplate data and voltage and current measurements. No speed sensors or electronic injection circuits are needed. The method can be divided into 4 major steps. First, complex space vectors are synthesized from voltage and current measurements. Second, the instantaneous rotor speed is detected by calculating the rotational speed of a single rotor slot harmonic component with respect to the rotational speed of the fundamental frequency component. Third, the positive sequence fundamental frequency components are extracted from complex space vectors. Finally, least-squares estimates of the electrical parameters are determined from a dynamic induction motor equivalent circuit model.
    • 一种用于在稳态或动态电动机操作期间提供线路连接的感应电动机的电参数的估计的方法和装置。 电气参数根据电机铭牌数据和电压和电流测量值计算。 不需要速度传感器或电子注入电路。 该方法可分为4个主要步骤。 首先,从电压和电流测量中合成复杂的空间矢量。 第二,通过计算单个转子槽谐波分量相对于基频分量的转速的转速来检测瞬时转子速度。 第三,从复杂的空间矢量中提取正序基频分量。 最后,从动态感应电动机等效电路模型确定电参数的最小二乘估计。
    • 15. 发明授权
    • Complex adaptive phase discriminator
    • 复杂自适应相位鉴别器
    • US08494037B2
    • 2013-07-23
    • US12961061
    • 2010-12-06
    • Larry A. TurnerZhi Gao
    • Larry A. TurnerZhi Gao
    • H04B3/46H04B17/00H04Q1/20
    • G01R23/02H02P23/14
    • A Complex Adaptive Phase Discriminator (PD), as presented in some concepts of the present disclosure, is an adaptive filter that accurately estimates the instantaneous frequency of a dynamic complex signal. The PD can demonstrate accurate instantaneous frequency estimation and rapid convergence in dynamic complex signal environments, even when the frequency of its input may change rapidly. A direct PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a phase of a complex exponential by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be directly estimated from the phase of the complex exponential. In contrast, an indirect PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a complex coefficient by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be indirectly estimated by extracting the phase of the complex coefficient.
    • 如本公开的一些概念所示的复合自适应相位鉴别器(PD)是精确估计动态复合信号的瞬时频率的自适应滤波器。 PD可以在动态复杂信号环境中展现精确的瞬时频率估计和快速收敛,即使其输入频率可能快速变化。 直接PD架构可以估计复杂主信号的瞬时频率,通过最小化复合误差信号的均方误差来迭代地适应复指数的相位。 瞬时频率可以从复指数的相位直接估计。 相比之下,间接PD架构可以估计复杂主信号的瞬时频率,通过最小化复合误差信号的均方误差来迭代地适应复系数。 可以通过提取复系数的相位来间接估计瞬时频率。
    • 16. 发明申请
    • COMPLEX ADAPTIVE PHASE DISCRIMINATOR
    • 复杂自适应相位辨识器
    • US20120140806A1
    • 2012-06-07
    • US12961061
    • 2010-12-06
    • Larry A. TurnerZhi Gao
    • Larry A. TurnerZhi Gao
    • H04B3/46
    • G01R23/02H02P23/14
    • A Complex Adaptive Phase Discriminator (PD), as presented in some concepts of the present disclosure, is an adaptive filter that accurately estimates the instantaneous frequency of a dynamic complex signal. The PD can demonstrate accurate instantaneous frequency estimation and rapid convergence in dynamic complex signal environments, even when the frequency of its input may change rapidly. A direct PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a phase of a complex exponential by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be directly estimated from the phase of the complex exponential. In contrast, an indirect PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a complex coefficient by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be indirectly estimated by extracting the phase of the complex coefficient.
    • 如本公开的一些概念所示的复合自适应相位鉴别器(PD)是精确估计动态复合信号的瞬时频率的自适应滤波器。 PD可以在动态复杂信号环境中展现精确的瞬时频率估计和快速收敛,即使其输入频率可能快速变化。 直接PD架构可以估计复杂主信号的瞬时频率,通过最小化复合误差信号的均方误差来迭代地适应复指数的相位。 瞬时频率可以从复指数的相位直接估计。 相比之下,间接PD架构可以估计复杂主信号的瞬时频率,通过最小化复合误差信号的均方误差来迭代地适应复系数。 可以通过提取复系数的相位来间接估计瞬时频率。
    • 17. 发明授权
    • Complex phase locked loop
    • 复杂锁相环
    • US08024120B2
    • 2011-09-20
    • US12268789
    • 2008-11-11
    • Larry A. Turner
    • Larry A. Turner
    • G06F19/00G06F17/40G01D21/00G01M13/00G01M99/00
    • H02P23/14H03D3/00
    • A method of estimating an instantaneous frequency of a component of interest in a complex primary signal via a complex Phase Locked Loop (PLL). A complex incident signal including a complex exponential evaluated at a synthesis frequency is calculated according to a complex Voltage Controlled Oscillator (VCO) function. A complex mixed signal is calculated according to a function that includes multiplying the complex primary signal by a representation of the complex incident signal. A complex baseband signal is calculated according to a function that includes filtering the complex mixed signal such that the bandwidth of the complex baseband signal is less than or equal to the bandwidth of the complex mixed signal. A residual frequency of the complex baseband signal is calculated via a complex Phase Discriminator (PD). The synthesis frequency is modified according to a function that includes the synthesis frequency and the residual frequency, such that the residual frequency is minimized. The instantaneous frequency is calculated according to a function that includes a representation of the synthesis frequency and stored.
    • 一种通过复合锁相环(PLL)估计复信号信号中感兴趣分量的瞬时频率的方法。 根据复合压控振荡器(VCO)功能计算包括以合成频率评估的复指数的复杂入射信号。 根据包括将复合主信号乘以复入射信号的表示的函数来计算复混合信号。 根据包括对复合混合信号进行滤波,使得复基带信号的带宽小于或等于复混合信号的带宽的函数来计算复基带信号。 通过复相位鉴别器(PD)计算复基带信号的剩余频率。 根据包括合成频率和残余频率的功能来修改合成频率,使得剩余频率最小化。 根据包括合成频率的表示并存储的函数来计算瞬时频率。
    • 20. 发明申请
    • COMPLEX PHASE LOCKED LOOP
    • 复合相锁定环路
    • US20090287437A1
    • 2009-11-19
    • US12268789
    • 2008-11-11
    • Larry A. Turner
    • Larry A. Turner
    • G01R23/00G06F19/00
    • H02P23/14H03D3/00
    • A method of estimating an instantaneous frequency of a component of interest in a complex primary signal via a complex Phase Locked Loop (PLL). A complex incident signal including a complex exponential evaluated at a synthesis frequency is calculated according to a complex Voltage Controlled Oscillator (VCO) function. A complex mixed signal is calculated according to a function that includes multiplying the complex primary signal by a representation of the complex incident signal. A complex baseband signal is calculated according to a function that includes filtering the complex mixed signal such that the bandwidth of the complex baseband signal is less than or equal to the bandwidth of the complex mixed signal. A residual frequency of the complex baseband signal is calculated via a complex Phase Discriminator (PD). The synthesis frequency is modified according to a function that includes the synthesis frequency and the residual frequency, such that the residual frequency is minimized. The instantaneous frequency is calculated according to a function that includes a representation of the synthesis frequency and stored.
    • 一种通过复合锁相环(PLL)估计复信号信号中感兴趣分量的瞬时频率的方法。 根据复合压控振荡器(VCO)功能计算包括以合成频率评估的复指数的复杂入射信号。 根据包括将复合主信号乘以复入射信号的表示的函数来计算复混合信号。 根据包括对复杂混合信号进行滤波的功能来计算复基带信号,使得复基带信号的带宽小于或等于复混合信号的带宽。 通过复相位鉴别器(PD)计算复基带信号的剩余频率。 根据包括合成频率和残余频率的功能来修改合成频率,使得剩余频率最小化。 根据包括合成频率的表示并存储的函数来计算瞬时频率。