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公开(公告)号：US09917542B2
公开(公告)日：2018-03-13
申请号：US15250306
申请日：2016-08-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
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公开(公告)号：US20170272012A1
公开(公告)日：2017-09-21
申请号：US15615074
申请日：2017-06-06
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Eric James Thomas
IPC: H02P6/182
CPC classification number: H02P6/182
Abstract: A method of determining the angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM) includes providing a processor having an associated memory, wherein the memory stores an angular position determination (APD) equation or hardware is included implementing the APD equation. The APD equation determines the angular position from N-phase measurements obtained from the stator windings associated with each of the N-phases. A voltage or a current is forced upon the stator terminals of the stator windings for each of the N-phases, a resulting stator current or stator voltage is sensed to provide the N-phase measurements responsive to the forcing of the voltage or current, and the APD equation is used to determine the angular position from the N-phase measurements.
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公开(公告)号：US09431947B2
公开(公告)日：2016-08-30
申请号：US14721786
申请日：2015-05-26
Applicant: Texas Instruments Incorporated
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (A) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
Abstract translation: 一种确定N相永磁电动机（PMM）的转子的角位置（A）的方法。 具有相关联的存储的角位置确定（APD）算法的处理器被编程为实现该算法以使相关联的电动机控制器执行步骤，包括一次将一个向量强制为电流或电压矢量的相位矢量组合到绕组的定子端子 N相是正和负幅度矢量，其中矢量幅度足够小以至不移动转子，并且强制电流或电压矢量的持续时间基本上是恒定的。 对于每个电流或电压矢量测量得到的定子电流或电压电平。 通过产生的定子电流电平或所得到的定子电压电平的叠加产生N维电流矢量或电压矢量。 使用N维电流矢量或电压矢量来确定角位置。
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公开(公告)号：US20210313916A1
公开(公告)日：2021-10-07
申请号：US17347753
申请日：2021-06-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
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Patent Agency Ranking
公开(公告)号：US11070155B2
公开(公告)日：2021-07-20
申请号：US16740517
申请日：2020-01-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
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公开(公告)号：US20200153374A1
公开(公告)日：2020-05-14
申请号：US16740517
申请日：2020-01-13
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
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公开(公告)号：US09912275B2
公开(公告)日：2018-03-06
申请号：US15250337
申请日：2016-08-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
CPC classification number: H02P21/18 , H02P21/0025 , H02P21/06 , H02P21/24 , H02P25/03 , H02P25/08 , H02P27/08
Abstract: A method of normalizing phase measurements for a motor using a normalizing phase measurements (NPM) algorithm that a processor implements to cause a motor controller coupled to stator terminals of the phases to execute forcing a set of input current or voltage vectors (set of input vectors) including repeating the forcing after rotating the rotor through a full mechanical cycle to generate resulting current or voltage samples (resulting samples) of non-normalized phase A and phase B waveforms. The magnitude of the input vectors are sufficiently small to not move the rotor. A maximum value (x_max) and a minimum value (x_min) are determined for each of the non-normalized phase A and phase B waveforms. An offset value and normalization scale factor (NSF) are determined from the max and min values. The offsets and NSFs are applied to the non-normalized phase waveforms to generate normalized phase A and phase B waveforms.
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公开(公告)号：US20180006588A1
公开(公告)日：2018-01-04
申请号：US15702130
申请日：2017-09-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Eric James Thomas
Abstract: Low speed and high speed estimates of rotor angle and speed relative to the stator are received from a low speed estimator and a high speed estimator, respectively. LS_θ_EST and a subset of torque-controlling I_Q trajectory curve (“IQTC”) parameter values appropriate to low speed rotor operation are selected for rotor speeds below a low speed threshold value ω_LOW_THRS. HS_θ_EST and a subset of IQTC curve parameter values appropriate to high speed rotor operation are selected for rotor speeds above a high speed threshold value ω_HIGH_THRS. LS_θ_EST and the low speed subset of IQTC parameter values remain selected for rotor speeds less than ω_HIGH_THRS after accelerating to a rotor speed greater than ω_LOW_THRS. HS_θ_EST and the subset of high speed IQTC parameter values remain selected for rotor speeds greater than ω_LOW_THRS after decelerating to a rotor speed less than ω_HIGH_THRS.
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公开(公告)号：US09762155B1
公开(公告)日：2017-09-12
申请号：US15163450
申请日：2016-05-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Eric James Thomas
CPC classification number: H02P6/08 , H02P6/18 , H02P6/181 , H02P6/182 , H02P21/18 , H02P21/24 , H02P27/08
Abstract: Low speed and high speed estimates of rotor angle and speed (LS_θ_EST/LS_ω_EST and HS_θ_EST/HS_ω_EST) relative to the stator are received from a low speed estimator and a high speed estimator, respectively. LS_θ_EST and a subset of torque-controlling I_Q trajectory curve (“IQTC”) parameter values appropriate to low speed rotor operation are selected for rotor speeds below a low speed threshold value ω_LOW_THRS. HS_θ_EST and a subset of IQTC curve parameter values appropriate to high speed rotor operation are selected for rotor speeds above a high speed threshold value ω_HIGH_THRS. LS_θ_EST and the low speed subset of IQTC parameter values remain selected for rotor speeds less than ω_HIGH_THRS after accelerating to a rotor speed greater than ω_LOW_THRS. HS_θ_EST and the subset of high speed IQTC parameter values remain selected for rotor speeds greater than ω_LOW_THRS after decelerating to a rotor speed less than ω_HIGH_THRS. Hysteresis in the selection of θ_EST and IQTC parameter values results in smooth acceleration/deceleration control.
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