-
11.发明授权
公开(公告)号：US5917721A
公开(公告)日：1999-06-29
申请号：US976188
申请日：1997-11-21
申请人： Russel J. Kerkman , David Leggate
发明人： Russel J. Kerkman , David Leggate
IPC分类号： H02M7/5387 , H02M7/797
CPC分类号： H02M7/53875 , H02M2001/385
摘要： A method and apparatus for compensating for deviations in the alternating voltage produced by a PWM inverter. The necessary sequence in which inverter components must be triggered results in voltage error pulses that accumulate over time and result in deviations from ideal voltage at motor terminals. By allowing the error pulses to continue and adjusting the trigger times to compensate for the error pulses, the effect of the error pulses is negated and the voltage deviations are eliminated.
摘要翻译： 一种用于补偿PWM逆变器产生的交流电压偏差的方法和装置。 逆变器部件必须触发的必要顺序导致电压误差脉冲随时间累积，导致电机端子理想电压偏差。 通过允许误差脉冲继续并调整触发时间以补偿误差脉冲，误差脉冲的影响被否定，并且消除了电压偏差。
-
12.发明授权
公开(公告)号：US5625550A
公开(公告)日：1997-04-29
申请号：US313633
申请日：1994-09-27
申请人： David Leggate , Russel J. Kerkman
发明人： David Leggate , Russel J. Kerkman
IPC分类号： H02M7/5387 , H02P27/08 , H02P5/40
CPC分类号： H02P27/08 , H02M7/53875 , H02M2001/385
摘要： A method and apparatus for compensating for deviations in the alternating voltage produced by a PWM inverter. The necessary sequence in which inverter components must be triggered results in voltage error pulses that accumulate over time and result in deviations from ideal voltage at motor terminals. By allowing the error pulses to continue and adjusting the trigger times to compensate for the error pulses, the effect of the error pulses is negated and the voltage deviations are eliminated.
摘要翻译： 一种用于补偿PWM逆变器产生的交流电压偏差的方法和装置。 逆变器部件必须触发的必要顺序导致电压误差脉冲随时间累积，导致电机端子理想电压偏差。 通过允许误差脉冲继续并调整触发时间以补偿误差脉冲，误差脉冲的影响被否定，并且消除了电压偏差。
-
公开(公告)号：US20120075892A1
公开(公告)日：2012-03-29
申请号：US12893838
申请日：2010-09-29
CPC分类号： H02M5/4585 , H02M1/12 , H02M2001/0025 , H02M2001/123 , H02M2001/385
摘要： Control systems, methods and power conversion systems are presented for reducing common mode voltages in AC motor loads driven by inverter PWM control using switching sequences with only active vectors where a first vector of each switching sequence differs by one phase switching state from a last vector of a switching sequence of an adjacent sector, along with enhanced deadtime compensation and reflected wave reduction techniques in providing pulse width modulated switching signals to a switching inverter.
摘要翻译： 提出了控制系统，方法和功率转换系统，用于降低由逆变器PWM控制驱动的交流电动机负载中的共模电压，其中仅使用具有每个开关序列的第一向量与一个相位切换状态与最后一个矢量 相邻扇区的切换序列，以及增强的死区时间补偿以及向切换逆变器提供脉宽调制切换信号的反射波减少技术。
-
公开(公告)号：US07342380B1
公开(公告)日：2008-03-11
申请号：US11469147
申请日：2006-08-31
IPC分类号： H02P23/00
CPC分类号： H02P6/14
摘要： A system and method for controlling an inverter of a motor control unit includes a controller having a user interface configured to allow user selection of a waveform increment value or a waveform amplitude threshold. The controller also includes an integrator configured to receive the waveform increment value and generate a signal at least based on the waveform increment value. A logic circuit is configured to monitor the signal and reset the integrator when the signal reaches the waveform amplitude threshold to generate a waveform having a frequency-independent amplitude. A comparator compares the waveform to a modulating signal to trigger gating pulses delivered to an inverter to drive an associated motor.
摘要翻译： 用于控制电动机控制单元的逆变器的系统和方法包括具有用户接口的控制器，该用户接口被配置为允许用户选择波形增量值或波形振幅阈值。 所述控制器还包括被配置为接收所述波形增量值并且至少基于所述波形增量值产生信号的积分器。 逻辑电路被配置为当信号达到波形幅度阈值时监视信号并复位积分器，以产生具有与频率无关的振幅的波形。 比较器将波形与调制信号进行比较，以触发输送到逆变器的门控脉冲来驱动相关电机。
-
公开(公告)号：US20080054841A1
公开(公告)日：2008-03-06
申请号：US11469147
申请日：2006-08-31
IPC分类号： H02P27/04
CPC分类号： H02P6/14
摘要： A system and method for controlling an inverter of a motor control unit includes a controller having a user interface configured to allow user selection of a waveform increment value or a waveform amplitude threshold. The controller also includes an integrator configured to receive the waveform increment value and generate a signal at least based on the waveform increment value. A logic circuit is configured to monitor the signal and reset the integrator when the signal reaches the waveform amplitude threshold to generate a waveform having a frequency-independent amplitude. A comparator compares the waveform to a modulating signal to trigger gating pulses delivered to an inverter to drive an associated motor.
摘要翻译： 用于控制电动机控制单元的逆变器的系统和方法包括具有用户接口的控制器，该用户接口被配置为允许用户选择波形增量值或波形振幅阈值。 所述控制器还包括被配置为接收所述波形增量值并且至少基于所述波形增量值产生信号的积分器。 逻辑电路被配置为当信号达到波形幅度阈值时监视信号并复位积分器，以产生具有与频率无关的振幅的波形。 比较器将波形与调制信号进行比较，以触发输送到逆变器的门控脉冲来驱动相关电机。
-
公开(公告)号：US06819070B2
公开(公告)日：2004-11-16
申请号：US10365268
申请日：2003-02-12
申请人： Russel J. Kerkman , David Leggate
发明人： Russel J. Kerkman , David Leggate
IPC分类号： H02M7521
CPC分类号： H02M1/32 , H02M7/53875
摘要： A method and apparatus to be used with a motor controller generating firing pulses to control an inverter, the inverter providing exciting voltage to a motor corresponding to the firing pulses, the voltage having a maximum intended amplitude, the method for substantially eliminating exciting voltage overvoltage by modifying the firing pulses, the method comprising the steps of identifying characteristics of an initial firing pulse, comparing the initial pulse characteristics to an overvoltage characteristic set known to cause overvoltage, where the initial pulse characteristics match the overvoltage characteristic set, altering the initial firing pulse such that the altered firing pulse does not cause overvoltage, identifying an accumulated error corresponding to the altered firing pulse, modifying the firing pulse following the altered firing pulse as a function of the accumulated error to generate a composite firing pulse; and repeating the identifying, comparing, altering, identifying and modifying process with the composite firing pulse as the initial firing pulse.
-
17.发明授权Method and apparatus for controlling reflected voltage using a motor controller 失效使用电机控制器控制反射电压的方法和装置
公开(公告)号：US5912813A
公开(公告)日：1999-06-15
申请号：US941830
申请日：1997-10-01
IPC分类号： H02M1/00 , H02M7/5387 , H02M7/521 , H02P5/40
CPC分类号： H02M7/53875 , H02M1/32 , H02M2001/0025
摘要： A method and apparatus for eliminating greater than twice motor over voltage by altering modulating signals provided to a PWM controller which in turn provides firing pulses to a PWM inverter. The modulating waves are altered by either tying them to positive or negative DC buses or limiting their maximum magnitudes when their instantaneous characteristics are known to cause greater than twice overvoltage. The modulating waveforms are altered in a symmetrical fashion so that the resulting fundamental terminal voltages remain essentially unchanged.
摘要翻译： 一种用于通过改变提供给PWM控制器的调制信号来消除大于两倍电机过电压的方法和装置，其进而向PWM逆变器提供点火脉冲。 调制波通过将它们绑定到正或负DC总线或者当其瞬时特性已知导致大于两倍的过电压时限制其最大幅度而改变。 调制波形以对称方式改变，使得所得到的基极端电压基本保持不变。
-
公开(公告)号：US08471516B2
公开(公告)日：2013-06-25
申请号：US12786229
申请日：2010-05-24
IPC分类号： G05B11/28
CPC分类号： H02M7/537 , H02M7/53875 , H02P9/007 , H02P27/08 , H02P29/68
摘要： The present techniques include methods and systems for operating an inverter to maintain a lifespan of the inverter. In some embodiments, the switching frequency and/or the output current of the inverter may be changed such that stress may be reduced on the inverter bond wires of the inverter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the inverter and determining whether the operating conditions result in aging the inverter to a point which reduces the inverter lifespan below a desired lifespan. If the operating conditions reduce the inverter lifespan below the desired lifespan, the switching frequency may be reduced to a lower or minimum switching frequency of the inverter and/or the output current of the inverter may be reduced to a maximum output current at the minimum switching frequency.
摘要翻译： 本技术包括用于操作逆变器以维持逆变器寿命的方法和系统。 在一些实施例中，可以改变逆变器的开关频率和/或输出电流，使得逆变器的反相器接合线上的应力可能减小。 更具体地，实施例涉及计算逆变器的某些工作条件的老化参数，并且确定操作条件是否导致变频器老化到将变频器寿命降低到期望寿命以下的时间点。 如果工作条件将变频器寿命降低到期望的寿命以下，开关频率可以降低到变频器的较低或最小开关频率，和/或可以将逆变器的输出电流降至最小输出电流 频率。
-
公开(公告)号：US20120212172A1
公开(公告)日：2012-08-23
申请号：US13031454
申请日：2011-02-21
CPC分类号： G01R31/025 , G01R31/42
摘要： The present invention relates generally to systems and methods for detecting ground faults (i.e., line-to-ground faults) in electrical power conversion systems. In particular, the embodiments described herein include a common mode voltage booster module configured to calculate a common mode voltage boost factor and a common mode voltage boost function based on a plurality of voltage commands for the system. The common mode voltage boost factor and/or the common mode voltage boost function may be applied to the voltage commands to generate boosted voltage commands which, when applied to an inverter or converter, source current indicative of ground faults in the system. More specifically, the common mode voltage boost factor may be multiplied by a common mode voltage calculated by a common mode voltage calculator and summed with the voltage commands. In addition, the common mode voltage boost function may be summed with the voltage commands after the voltage commands have been summed with the common mode voltage boost factor.
摘要翻译： 本发明一般涉及用于检测电力转换系统中的接地故障（即，线对地故障）的系统和方法。 特别地，本文所述的实施例包括共模电压升压模块，其被配置为基于用于该系统的多个电压指令来计算共模升压因子和共模升压功能。 共模升压因子和/或共模升压功能可以被施加到电压指令以产生升压电压命令，当被施加到逆变器或转换器时，指示系统中的接地故障的源电流。 更具体地，共模电压升高因子可以乘以由共模电压计算器计算并与电压指令相加的共模电压。 此外，共模电压升压功能可以在电压指令与共模升压因子相加之后与电压指令相加。
-
公开(公告)号：US20110199072A1
公开(公告)日：2011-08-18
申请号：US12706488
申请日：2010-02-16
IPC分类号： G01R25/00
摘要： A system and method for controlling an electrical device is provided. The method comprises receiving three phase power from a source, decomposing signals representative of power in each phase of the three phase power to provide a positive-sequence component of each phase and tracking the positive-sequence component of each phase via a phase locked loop and a tracking filter.
摘要翻译： 提供了一种用于控制电气设备的系统和方法。 该方法包括从源接收三相功率，分解代表三相功率的每相中的功率的信号，以提供每相的正序分量，并通过锁相环追踪每相的正序分量; 跟踪过滤器
-
-
-
-
-
-
-
-
-
搜索结果
83 条记录 (耗时 0.029 秒)
