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公开(公告)号：US20240195339A1
公开(公告)日：2024-06-13
申请号：US18065170
申请日：2022-12-13
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Bing Li
IPC: H02P27/06 , H02P21/14 , H02P21/18 , H02P21/34 , H02P25/024 , H02P25/092
CPC classification number: H02P27/06 , H02P21/141 , H02P21/18 , H02P21/34 , H02P25/024 , H02P25/092 , H02P2201/01 , H02P2207/01
Abstract: A method for flying start control of a motor, a computer readable medium, and a power conversion system having an inverter and a controller configured by computer executable instructions in a memory to perform flying start of a rotating motor by field weakening control to control the motor responsive to the motor speed exceeding the rated speed or other non-zero threshold at startup of the power conversion system. The method includes measuring a motor speed of a motor, responsive to startup of a power conversion system, and performing a flying start operation using field weakening control to control the motor responsive to the motor speed exceeding a non-zero threshold at startup of the power conversion system.
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公开(公告)号：US12176837B2
公开(公告)日：2024-12-24
申请号：US18065170
申请日：2022-12-13
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Bing Li
IPC: H02M7/5375 , H02P21/14 , H02P21/18 , H02P21/34 , H02P25/024 , H02P25/092 , H02P27/06
Abstract: A method for flying start control of a motor, a computer readable medium, and a power conversion system having an inverter and a controller configured by computer executable instructions in a memory to perform flying start of a rotating motor by field weakening control to control the motor responsive to the motor speed exceeding the rated speed or other non-zero threshold at startup of the power conversion system. The method includes measuring a motor speed of a motor, responsive to startup of a power conversion system, and performing a flying start operation using field weakening control to control the motor responsive to the motor speed exceeding a non-zero threshold at startup of the power conversion system.
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公开(公告)号：US11502636B1
公开(公告)日：2022-11-15
申请号：US17371738
申请日：2021-07-09
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Bing Li , Takayoshi Matsuo
Abstract: A power conversion system includes an inverter and a controller configured to: responsive to startup of the system, measure a motor speed of the IPM motor; responsive to the motor speed being less than a threshold, generate the inverter switching control signals to perform high frequency injection (HFI); during the HFI, determine a measured angle of the IPM motor; during the HFI, generate the inverter switching control signals to provide an injected current to the IPM motor; detect acceleration or deceleration of the IPM motor responsive to the injected current; selectively determine an electrical angle as half the measured angle or as 180 degrees plus half the measured angle based on the detected acceleration or deceleration of the IPM motor; and responsive to determining the electrical angle, generate the inverter switching control signals to drive the IPM motor to a reference frequency in a normal operating mode of the inverter.
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公开(公告)号：US20220065909A1
公开(公告)日：2022-03-03
申请号：US17010624
申请日：2020-09-02
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Lixiang Wei , Bing Li , Jacob Lamb
Abstract: For motor stator resistance calculation, a method estimates an output voltage using a Direct Current (DC) bus voltage and a duty ratio for a motor drive at a first switching frequency and at least one second switching frequency. The method measures an output current at the first switching frequency and the at least one second switching frequency. The method calculates a first stator resistance for the first switching frequency and at least one second stator resistance for the at least one second switching frequency. The method estimates a stator resistance at a DC condition based on the first stator resistance and the at least one second stator resistance. The method sets a dynamic compensation based on a stator resistance error between the first switching frequency and the at least one second switching frequency.
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公开(公告)号：US11671037B1
公开(公告)日：2023-06-06
申请号：US17737826
申请日：2022-05-05
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Bing Li , Brian J. Seibel
IPC: H02P6/08 , H02P25/022
CPC classification number: H02P6/08 , H02P25/022 , H02P2207/055
Abstract: For improving Maximum Torque per Amps (MTPA) control, a method generates an offline MTPA curve based on an autotune test for a motor, which is used as offline MTPA control in order to run a motor at a high efficiency operation point. Another online method generates a search zone for the MTPA curve for a given torque point. The search zone includes an upper D-axis reference current and a lower D-axis reference current for the given torque point. The method iteratively modifies a D-axis reference current between the upper D-axis reference current and the lower D-axis reference current of the search zone. The method modifies a Q-axis reference current to output the given torque. The method updates a corresponding current pair of the given torque point to the modified D-axis reference current and the modified Q-axis reference current with a lowest current amplitude to improve MTPA control of the motor.
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Patent Agency Ranking
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：US20160254760A1
公开(公告)日：2016-09-01
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
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：US11366147B2
公开(公告)日：2022-06-21
申请号：US17010624
申请日：2020-09-02
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Lixiang Wei , Bing Li , Jacob Lamb
Abstract: For motor stator resistance calculation, a method estimates an output voltage using a Direct Current (DC) bus voltage and a duty ratio for a motor drive at a first switching frequency and at least one second switching frequency. The method measures an output current at the first switching frequency and the at least one second switching frequency. The method calculates a first stator resistance for the first switching frequency and at least one second stator resistance for the at least one second switching frequency. The method estimates a stator resistance at a DC condition based on the first stator resistance and the at least one second stator resistance. The method sets a dynamic compensation based on a stator resistance error between the first switching frequency and the at least one second switching frequency.
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公开(公告)号：US11239780B1
公开(公告)日：2022-02-01
申请号：US17031359
申请日：2020-09-24
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jacob Lamb , Bing Li , Brian Seibel
IPC: H02P21/14
Abstract: For flux map identification, a method applies an initial voltage to a motor. The motor is a salient motor. The method generates a flux map for the motor. The method iteratively applies a variable voltage to the motor. The variable voltage includes a constant current change calculated from the flux map. The method iteratively modifies the flux map.
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公开(公告)号：US10996079B1
公开(公告)日：2021-05-04
申请号：US16702350
申请日：2019-12-03
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Bing Li , Takayoshi Matsuo
Abstract: For encoder offset fine tuning, a processor iteratively reduces an encoder offset error of the motor with a third offset step until the motor starts. The processor iteratively modifies the encoder offset of the motor turning in a positive direction with a first offset step until the motor stops. The processor further records the encoder offset as a first encoder offset. The processor iteratively modifies the encoder offset with the first offset step until the motor starts turning in a negative direction. The negative direction is opposite the positive direction. The processor iteratively modifies the encoder offset with a second offset step until the motor stops. The processor records the encoder offset as a second encoder offset. In addition, the processor calculates a final encoder offset as a function of the first encoder offset and the second encoder offset.
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