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公开(公告)号：US10727772B1
公开(公告)日：2020-07-28
申请号：US16286425
申请日：2019-02-26
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Lei Jin , Robert J. Miklosovic , Zhendong Zhang , Timothy M. Rowan , Haihui Lu
Abstract: For predicting a load pattern, a method determines a torque error from a torque reference modified by a low pass filter function of the torque reference. The torque reference is one of measured from an induction machine energized by a flux current and a torque current and calculated in an induction machine controller. The method determines a torque increase pulse in response to a torque relative variation calculated from the torque error exceeding an increase threshold. In response to detecting the torque increase pulse, the method determines a change delay time from the torque relative variation and the torque increase pulse. The method further determines a change period from at least two torque increase pulses. The method increases the flux current before a change time that is predicted as a function of the change delay time and the change period.
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公开(公告)号：US20160248354A1
公开(公告)日：2016-08-25
申请号：US14625860
申请日：2015-02-19
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jingbo Liu , Thomas Nondahl , Peter B. Schmidt , Takayoshi Matsuo , Timothy M. Rowan
IPC: H02P6/18
Abstract: Motor drives, methods and estimation systems are presented for estimating a rotor position of a motor load in which four sets of inverter output current samples obtained at four different sample times in a given inverter PWM cycle are converted into a corresponding stationary reference frame current value pairs, and the rotor position estimate is computed according to the stationary reference frame current values.
Abstract translation: 提出了电动机驱动，方法和估计系统，用于估计电机负载的转子位置，其中在给定的逆变器PWM周期中在四个不同的采样时间获得的四组逆变器输出电流样本被转换成相应的静止参考帧电流值对 ，并且根据静止参考帧电流值计算转子位置估计。
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公开(公告)号：US10756659B1
公开(公告)日：2020-08-25
申请号：US16398961
申请日：2019-04-30
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Bing Li , Timothy M. Rowan , Zhenyu Ye , Zhendong Zhang
Abstract: For counter electromotive force estimation, a disturbance estimator calculates an estimated disturbance as a control function of a quadrature axis current regulator output signal and a quadrature axis current feedback signal of a running permanent magnet motor. A calculator calculates an estimated counter electromotive force of the running permanent magnet motor as a function of the estimated disturbance, a control flux, and an angular velocity.
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公开(公告)号：US20200228029A1
公开(公告)日：2020-07-16
申请号：US16789899
申请日：2020-02-13
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jacob M. Lamb , Brian J. Seibel , Timothy M. Rowan
IPC: H02M7/5395 , H02P27/08 , H02M1/088
Abstract: Power conversion systems and a controller thereof include a processing system that generates inverter switching control signals at a switching frequency, and transitions the switching frequency from a starting frequency to a target frequency over an integer number N blocks. The individual blocks include an integer number M subblocks with a starting frequency subblock in which the processing system generates the switching control signals at the starting frequency, and a target frequency subblock in which the processing system generates the switching control signals at the target frequency. The processing system operates the inverter at multiple demanded voltage values for multiple characterized switching frequencies, measures and records a corresponding inverter output current value for each of the demanded voltage values, creates and stores a lookup table for adjusted demand voltages at each of the characterized switching frequencies, and operate the inverter according to the adjusted demand voltages.
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公开(公告)号：US11368109B2
公开(公告)日：2022-06-21
申请号：US16789899
申请日：2020-02-13
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jacob M. Lamb , Brian J. Seibel , Timothy M. Rowan
IPC: H02M7/5395 , H02M1/088 , H02P27/08 , H02M5/458 , H02M1/00
Abstract: Power conversion systems and a controller thereof include a processing system that generates inverter switching control signals at a switching frequency, and transitions the switching frequency from a starting frequency to a target frequency over an integer number N blocks. The individual blocks include an integer number M subblocks with a starting frequency subblock in which the processing system generates the switching control signals at the starting frequency, and a target frequency subblock in which the processing system generates the switching control signals at the target frequency. The processing system operates the inverter at multiple demanded voltage values for multiple characterized switching frequencies, measures and records a corresponding inverter output current value for each of the demanded voltage values, creates and stores a lookup table for adjusted demand voltages at each of the characterized switching frequencies, and operate the inverter according to the adjusted demand voltages.
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Patent Agency Ranking
公开(公告)号：US10601343B1
公开(公告)日：2020-03-24
申请号：US16248966
申请日：2019-01-16
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jacob M. Lamb , Brian J. Seibel , Timothy M. Rowan
IPC: H02M7/5395 , H02M1/088 , H02P27/08 , H02M1/00 , H02M5/458
Abstract: Power conversion systems and a controller thereof include a processing system that generates inverter switching control signals at a switching frequency, and transitions the switching frequency from a starting frequency to a target frequency over an integer number N blocks. The individual blocks include an integer number M subblocks with a starting frequency subblock in which the processing system generates the switching control signals at the starting frequency, and a target frequency subblock in which the processing system generates the switching control signals at the target frequency. The processing system operates the inverter at multiple demanded voltage values for multiple characterized switching frequencies, measures and records a corresponding inverter output current value for each of the demanded voltage values, creates and stores a lookup table for adjusted demand voltages at each of the characterized switching frequencies, and operate the inverter according to the adjusted demand voltages.
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公开(公告)号：US09584043B2
公开(公告)日：2017-02-28
申请号：US14634737
申请日：2015-02-28
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zhendong Zhang , Takayoshi Matsuo , David Leggate , Timothy M. Rowan , Russel J. Kerkman , Bing Li
IPC: H02M7/48 , H02M7/5387 , H02M1/00
CPC classification number: H02M7/48 , H02M7/53871 , H02M7/5395 , H02M2001/0009
Abstract: Methods and apparatus are presented for sampling low side inverter phase currents, in which current sampling is selectively delayed in a given PWM cycle by a non-zero sampling delay time value from a nominal sample time if the middle pulse width value is less than a non-zero first threshold to facilitate adequate signal settling for accurate current measurement, and if a middle total continuous on-time near the end of the given PWM cycle is less than a non-zero second threshold, the middle total continuous on-time is selectively extended by adding a non-zero adjustment offset time value to a middle pulse width value for a next PWM cycle.
Abstract translation: 提出了用于采样低侧逆变器相电流的方法和装置，其中如果中间脉冲宽度值小于非正常采样时间，则在给定PWM周期中电流采样被选择性地从标称采样时间的非零采样延迟时间值延迟 为了促进适当的信号稳定以便精确的电流测量，并且如果在给定的PWM周期结束附近的中间总连续导通时间小于非零第二阈值，则中间的总连续导通时间是选择性的 通过向下一个PWM周期的中间脉冲宽度值添加非零调整偏移时间值来扩展。
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公开(公告)号：US11258388B1
公开(公告)日：2022-02-22
申请号：US16986936
申请日：2020-08-06
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Lei Jin , Zhendong Zhang , Haihui Lu , Timothy M. Rowan
Abstract: A system may include an inverter configured to convert a direct current (DC) voltage to an alternating current (AC) voltage. The system may also include a control system communicatively coupled to the inverter. The control system may receive a torque current feedback from a motor and may generate, based on the torque current feedback, a command torque current and a command flux current. The control system may generate, based on the command torque current and the command flux current, a command torque voltage and a command flux voltage and may generate, based on a slip frequency and a rotor frequency, a command frequency. The control system may determine one or more operating parameters for the inverter based on the command frequency, the command torque voltage, and the command flux voltage and may control the inverter based on the one or more operating parameters.
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公开(公告)号：US10541626B1
公开(公告)日：2020-01-21
申请号：US16247634
申请日：2019-01-15
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jacob M. Lamb , Brian J. Seibel , Timothy M. Rowan , Lixiang Wei
Abstract: Power conversion systems and a controller thereof includes a first processing system that computes phase references for respective phase lines of an inverter according to a feedback value, a setpoint value, and a scaling factor to emulate a scaled frequency that is less than a switching frequency, and a second processing system that generates a carrier waveform having the switching frequency, receives the phase reference from the first processing system for each inverter phase line, and compares each phase reference with the carrier waveform to generate pulse width modulated switching control signals for switching devices of the inverter.
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10.发明授权Adjustable PWM method to increase low speed starting torque and inverter voltage measurement accuracy 有权可调PWM方式提高低速起动转矩和变频器电压测量精度公开(公告)号：US09318976B1
公开(公告)日：2016-04-19
申请号：US14527804
申请日：2014-10-30
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Lixiang Wei , Jeffrey D. McGuire , Timothy M. Rowan
CPC classification number: H02M7/537 , H02M5/4585 , H02M7/53875 , H02P27/08 , H03K3/017
Abstract: Methods, control apparatus and computer readable mediums are presented for controlling a switching inverter in which a controller selectively suspends PWM carrier signals to provide inverter switching control signals using zero vectors in response to a maximal pulse width value for a present PWM half cycle being greater than a threshold value, and accumulates a present output control value for individual output phases for use in a subsequent PWM half cycle for selective effective reduction in switching frequency for low-speed operation while maintaining high frequency control loop sampling.
Abstract translation: 提出了用于控制开关逆变器的方法，控制装置和计算机可读介质，其中控制器选择性地暂停PWM载波信号，以响应于当前PWM半周期的最大脉冲宽度值大于0而使用零向量来提供逆变器切换控制信号 并且累积用于各个输出相位的当前输出控制值，以用于随后的PWM半周期，用于在保持高频控制环路采样的同时选择性有效地降低用于低速操作的开关频率。
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