专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20050073272A1 Method and system for managing processor execution time utilizing variable frequency switching 有权
公开(公告)号：US20050073272A1
公开(公告)日：2005-04-07
申请号：US10676529
申请日：2003-10-01
申请人： James Nagashima , Thomas O'Meara , Nitinkumar Patel , Steven Schulz
发明人： James Nagashima , Thomas O'Meara , Nitinkumar Patel , Steven Schulz
IPC分类号： H02P3/00 , H02P5/00 , H02P23/00
CPC分类号： H02P23/0004
摘要： The present invention includes a method for managing processor execution time in a motor controller. The method includes receiving motor speed data, comparing the received motor speed data to predetermined motor speed ranges, determining a motor speed range based on the comparison, and modulating an inverter switching frequency of the motor controller processor based on the motor speed range. The step of receiving motor speed data may include receiving machine terminal information, processing the received machine terminal information utilizing a sensorless control algorithm, and determining motor speed data based on the processed information. The step of modulating the inverter switching frequency may include determining a modified inverter switching frequency value based on the determined motor speed range and providing the modified inverter switching frequency value to a processor control algorithm. In one embodiment, the processor control algorithm modifies the inverter switching frequency based on the modified inverter switching frequency value.

2. 发明申请

US20060097688A1 Start-up and restart of interior permanent magnet machines 有权
标题翻译：启动和重新启动内置永磁机
公开(公告)号：US20060097688A1
公开(公告)日：2006-05-11
申请号：US10984269
申请日：2004-11-09
申请人： Nitinkumar Patel , Steven Schulz , Thomas O'Meara
发明人： Nitinkumar Patel , Steven Schulz , Thomas O'Meara
IPC分类号： H02P1/46
CPC分类号： H02P6/20 , F02N11/04 , F02N11/0859 , F02N2200/041 , H02P1/46 , H02P21/34
摘要： A method of starting a permanent magnet machine. A machine stator voltage in a stationary reference frame is sensed. An initial speed of a rotor of the machine is estimated based on the sensed voltage, and state variables of control algorithms are initialized based on the estimated initial speed. This method can provide smooth startup and/or restart at any speed.
摘要翻译：一种启动永磁机的方法。感测到静止参考系中的机器定子电压。基于感测到的电压来估计机器的转子的初始速度，并且基于估计的初始速度来初始化控制算法的状态变量。该方法可以以任何速度提供平稳的启动和/或重新启动。

3. 发明申请

US20060097702A1 Position-sensorless control of interior permanent magnet machines 有权
公开(公告)号：US20060097702A1
公开(公告)日：2006-05-11
申请号：US10984178
申请日：2004-11-09
申请人： James Nagashima , Khwaja Rahman , Nitinkumar Patel , Steven Schulz , Terence Ward , Stanley Fujii
发明人： James Nagashima , Khwaja Rahman , Nitinkumar Patel , Steven Schulz , Terence Ward , Stanley Fujii
IPC分类号： H02H7/06 , H02P9/00 , H02P11/00
CPC分类号： H02P21/04 , H02P21/0089 , H02P21/22 , H02P29/02
摘要： A method of controlling an IPM machine having a salient rotor. Stator terminal signals are measured and rotated to obtain synchronous reference frame current signals. A rotor position is estimated based on an impedance generated using the rotor and included in the current signals. The estimated rotor position is used to control the machine. An alternator-starter system in which this method is used can provide high cranking torque and generation power over a wide speed range while providing operational efficiency.

4. 发明申请

US20060055363A1 FIELD WEAKENING MOTOR CONTROL SYSTEM AND METHOD 失效
标题翻译：现场弱电机控制系统及方法
公开(公告)号：US20060055363A1
公开(公告)日：2006-03-16
申请号：US10939553
申请日：2004-09-13
申请人： Nitinkumar Patel , Steven Schulz , Seung Sul , Bon-Ho Bae
发明人： Nitinkumar Patel , Steven Schulz , Seung Sul , Bon-Ho Bae
IPC分类号： H02P3/18
CPC分类号： H02P21/10 , H02P21/0089
摘要： A control system for an electric machine includes a flux weakening module, which includes a voltage magnitude calculator that receives d-axis and q-axis command voltages and that generates a voltage magnitude. An error circuit compares the voltage magnitude to a reference voltage and generates an error signal. A controller receives the error signal and generates a feedback flux correction signal. A limiter limits the feedback flux correction signal to a predetermined flux value and generates a limited feedback flux correction signal. A feedforward stator flux generating circuit generates a feedforward stator flux signal. A summing circuit sums the feedforward stator flux signal and the limited feedback flux correction signal to generate a final stator flux command.
摘要翻译：一种用于电机的控制系统包括磁通削弱模块，其包括接收d轴和q轴指令电压并产生电压幅度的电压幅度计算器。误差电路将电压幅度与参考电压进行比较，并产生误差信号。控制器接收误差信号并产生反馈磁通校正信号。限制器将反馈磁通校正信号限制在预定磁通值，并产生有限的反馈磁通校正信号。前馈定子通量产生电路产生前馈定子磁通信号。求和电路将前馈定子磁通信号和有限反馈磁通校正信号相加，以产生最终的定子通量指令。

5. 发明申请

US20050110450A1 Decoupling a harmonic signal from a signal path 失效
标题翻译：从信号路径去耦合一个谐波信号
公开(公告)号：US20050110450A1
公开(公告)日：2005-05-26
申请号：US10720626
申请日：2003-11-24
申请人： Constantin Stancu , Silva Hiti , Steven Schulz , Nitinkumar Patel
发明人： Constantin Stancu , Silva Hiti , Steven Schulz , Nitinkumar Patel
IPC分类号： G05B11/36 , H02P6/18 , H02P21/14 , H04B20060101
CPC分类号： H02P6/185 , H02P6/183 , H02P21/18 , H02P2203/11 , H02P2207/01
摘要： A method for decoupling a harmonic signal from an input signal wherein the harmonic signal is harmonic relative to a signal other than the input signal. An angular position of the other signal is multiplied by a value representing the harmonic to obtain an angular position multiple. A harmonic decoupling block uses the angular position multiple to obtain correction signals representing the harmonic signal, and subtracts the correction signals from the input current to decouple the harmonic signal from the input signal. This method is useful for decoupling unwanted harmonics from currents into which high-frequency signals have been injected for control of electric motors.
摘要翻译：一种用于将谐波信号与输入信号去耦的方法，其中谐波信号是相对于输入信号以外的信号的谐波。将另一信号的角位置乘以表示谐波的值，以获得角位置倍数。谐波去耦块使用角位置倍数来获得表示谐波信号的校正信号，并从输入电流中减去校正信号，以将谐波信号与输入信号去耦。该方法对于将不想要的谐波与已注入高频信号的电流去耦以控制电动机是有用的。

6. 发明申请

US20050212471A1 Current regulation for a field weakening motor control system and method 有权
标题翻译：减弱电机控制系统和方法的电流调节
公开(公告)号：US20050212471A1
公开(公告)日：2005-09-29
申请号：US10808082
申请日：2004-03-24
申请人： Nitinkumar Patel , Steven Schulz
发明人： Nitinkumar Patel , Steven Schulz
IPC分类号： H02P7/00 , H02P21/08
CPC分类号： H02P21/08
摘要： A control system and method for an electric machine includes a first calculation module that receives a modified torque command and a calculated stator flux command and that generates first and second current commands and first and second voltage commands. A voltage magnitude calculation module generates a voltage magnitude based the first and second voltage commands. A reference voltage calculator module generates a reference voltage based on a DC link voltage, an angular stator velocity and the first and second current commands. A flux weakening module generates the calculated flux command based on the angular stator velocity, the reference voltage and the voltage magnitude.
摘要翻译：一种用于电机的控制系统和方法包括：第一计算模块，其接收修改的转矩指令和计算的定子磁通指令，并产生第一和第二电流指令以及第一和第二电压指令。电压幅度计算模块基于第一和第二电压命令产生电压幅度。参考电压计算器模块基于DC链路电压，角定子速度和第一和第二电流命令产生参考电压。磁通弱化模块基于角定子速度，参考电压和电压幅度产生计算的磁通指令。

7. 发明申请

US20070216344A1 Loss minimized PWM for voltage source inverters taking into account inverter non-linearity 有权
标题翻译：考虑到变频器非线性，电压源逆变器的损耗最小化为PWM
公开(公告)号：US20070216344A1
公开(公告)日：2007-09-20
申请号：US11376910
申请日：2006-03-16
申请人： Brian Welchko , Steven Schulz , Silva Hiti
发明人： Brian Welchko , Steven Schulz , Silva Hiti
IPC分类号： H02P27/04
CPC分类号： H02P27/04 , H02M2001/0048 , Y02B70/1491
摘要： A dynamic pulse width modulation (PWM) selection device automatically switches between discontinuous PWM (DPWM) control methods. The PWM selection device comprises a PWM control module. The PWM control module determines a desired pulse width of a switching control signal according to a desired output signal. The PWM control module controls an actual pulse width of the switching control signal according to the desired pulse width and a first PWM control method. A selection module determines whether the desired pulse width exceeds a pulse width threshold. The selection module selects a second PWM control method when the desired pulse width exceeds the pulse width threshold.
摘要翻译：动态脉宽调制（PWM）选择装置自动切换不连续PWM（DPWM）控制方式。 PWM选择装置包括PWM控制模块。 PWM控制模块根据期望的输出信号确定切换控制信号的期望脉冲宽度。 PWM控制模块根据期望的脉冲宽度和第一PWM控制方法控制开关控制信号的实际脉冲宽度。选择模块确定期望的脉冲宽度是否超过脉冲宽度阈值。当所需脉冲宽度超过脉冲宽度阈值时，选择模块选择第二个PWM控制方法。

8. 发明申请

US20050247480A1 Self winding electric cord 审中-公开
标题翻译：自动绕线电线
公开(公告)号：US20050247480A1
公开(公告)日：2005-11-10
申请号：US10838412
申请日：2004-05-04
申请人： Steven Schulz
发明人： Steven Schulz
IPC分类号： H01B7/06 , H01B7/29
CPC分类号： H01B7/06
摘要： An electric cord utilizing flat strip metal under tension to simplify rewinding the cord. The apparatus comprises a spring biased metal clad within a non-conducting sheath. The spring-loaded metal is biased to effect a concave surface in the general axis congruent to the extreme or long axis. The preloaded spring metal coils in its natural state. The embodiment of the invention locates multiple strips of spring metal in a parallel configuration. The apparatus confines the linear metal strips within a plastic or alternate non-conductor sheath configured to bend or distort the apparatus parallel to the long axis. The apparatus can then be distorted along the major axis to counteract the spring tension delaying the natural coiling of the electric cord. In a basic embodiment the distortion is applied by folding the electric cord along the major axis producing a ridged configuration and resisting the spring from coiling. Reversing the distortion by unfolding the electric cord recreates the spring tension and promotes the self-coiling action.
摘要翻译：在张力下使用扁平金属带的电线，以简化线的重绕。该装置包括在非导电护套内的弹簧偏压金属包层。弹簧加载的金属被偏置以在总轴上实现与极轴或长轴一致的凹面。预加载的弹簧金属线圈处于自然状态。本发明的实施例以多个平行配置的弹簧金属条定位。该装置将线性金属条限制在塑料或交替的非导体护套内，其被配置为使装置平行于长轴弯曲或变形。然后，该装置可以沿着主轴线扭曲，以抵消弹簧张力延迟电线的自然卷绕。在基本实施例中，通过沿着长轴折叠电线来施加变形，产生脊形结构并抵抗来自卷取的弹簧。通过展开电线来扭转扭曲，可以弹起弹簧张力并促进自卷取动作。

9. 发明申请

US20110027479A1 Seed Treatment Apparatus 审中-公开
标题翻译：种子处理装置
公开(公告)号：US20110027479A1
公开(公告)日：2011-02-03
申请号：US12848412
申请日：2010-08-02
申请人： Greg Reineccius , Steven Schulz
发明人： Greg Reineccius , Steven Schulz
IPC分类号： B05D1/02 , B05C5/00
CPC分类号： A01C1/06 , A01C1/08
摘要： A seed treatment apparatus provides for minimal waste of products for treating seeds, in that it is precisely controllable and automatically adjustable. A volume of seeds to be treated and a flow rate of treatment product for treating the seeds can both be sensed. At least one of the flow rate of the treatment product and the volume of seeds can automatically be adjusted if it is determined that a ratio of the flow rate of treatment product to the volume of seeds is not the same as a predetermined flow rate to volume ratio.
摘要翻译：种子处理装置提供用于处理种子的产品的最小浪费，因为它是精确可控且可自动调节的。可以检测待处理的种子的体积和用于处理种子的处理产物的流速。如果确定处理产品的流量与种子的体积的比率不同于预定的流量到体积，则可以自动调整处理产物的流速和种子的体积中的至少一个比。

10. 发明申请

US20070216341A1 Method and apparatus for PWM control of voltage source inverter 有权
标题翻译：电压源逆变器PWM控制方法及装置
公开(公告)号：US20070216341A1
公开(公告)日：2007-09-20
申请号：US11376915
申请日：2006-03-16
申请人： Slobodan Gataric , Brian Welchko , Steven Schulz , Silva Hiti , Steve West
发明人： Slobodan Gataric , Brian Welchko , Steven Schulz , Silva Hiti , Steve West
IPC分类号： H02P27/04
CPC分类号： H02P27/12 , H02M7/5387 , H02M2007/53876
摘要： PWM methods and apparatus are provided for loss minimized control of AC motors taking into consideration inverter non-linear limitations. The method comprises providing a voltage to the AC motor based on a switching cycle, adding a duty cycle of a zero vector to each phase leg of the switching cycle when a duty cycle of a first phase leg of the switching cycle is less than a minimum duty cycle, and subtracting the duty cycle of the zero vector from each phase leg of the switching cycle when a second duty cycle of a second phase leg is greater than a maximum duty cycle. The minimum duty cycle and maximum duty cycle indicate distortion regions.
摘要翻译：考虑到逆变器非线性限制，PWM方法和装置用于交流电机的损耗最小化控制。该方法包括：基于开关周期向AC电动机提供电压，当开关周期的第一相支路的占空比小于最小值时，将零矢量的占空比加到开关周期的每个相位支路上并且当第二相位脚的第二占空比大于最大占空比时，从开关周期的每个相位段减去零矢量的占空比。最小占空比和最大占空比表示失真区域。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式