公开(公告)号：US11105836B2

公开(公告)日：2021-08-31

申请号：US16746444

申请日：2020-01-17

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Dino Costanzo ,  Cheng Pan Cai ,  Xi Yu Xu

IPC: G01R19/25 ,  H02P27/08 ,  H02M1/00 ,  G01R15/14 ,  H02M7/5387

Abstract: A three-phase load is powered by a PWM (e.g., SVPWM) driven DC-AC inverter having a single shunt-topology. A shunt voltage and a branch voltage of the inverter (across a transistor to be calibrated) are measured during a second period of each SVPWM sector, and the drain-to-source resistance of the calibrated transistor is calculated. During the fourth period of each SVPWM sector, the branch voltage is measured again, and another branch voltage across another transistor is measured. Using the drain-to-source resistance of the calibrated transistor and the voltage across the calibrated transistor measured during the fourth period, the phase current through the calibrated transistor is calculated. Using the other branch voltage measured during the fourth period and the drain-to-source resistance of its corresponding transistor (known from a prior SVPWM sector), the phase current through that transistor is calculated. From the two calculated phase currents, the other phase current can be calculated.

公开(公告)号：US09784772B2

公开(公告)日：2017-10-10

申请号：US15079302

申请日：2016-03-24

Applicant: STMicroelectronics S.r.l.

Inventor： Dino Costanzo ,  Giacomo Scelba ,  Giuseppe Scarcella

IPC: H02K29/10 ,  G01R19/175 ,  H02P6/18 ,  H02P21/18

CPC classification number: G01R19/175 ,  H02P6/183 ,  H02P21/18

Abstract: An estimate of the initial position of a rotor is made by monitoring sensed motor current signals which are amplitude and phase modulated with the rotor flux position in response to a high frequency voltage signal injection. The motor current signals are envelope detected to determine zero crossing points. Samples are taken of the motor current signals at positive and negative offsets from the zero crossing point, with the samples processed to identify a direction of the rotor flux axis. Further samples of at least one motor current signal are taken with respect to a certain phase reference, and the samples compared to resolve a polarity of the rotor flux axis which is indicative of the angular position of the rotor.

公开(公告)号：US09325263B1

公开(公告)日：2016-04-26

申请号：US14533330

申请日：2014-11-05

Applicant: STMicroelectronics S.r.l.

Inventor： Dino Costanzo ,  Giacomo Scelba ,  Giuseppe Scarcella

IPC: H02P6/16 ,  H02P6/18

CPC classification number: G01R19/175 ,  H02P6/183 ,  H02P21/18

Abstract: An estimate of the initial position of a rotor is made by monitoring sensed motor current signals which are amplitude and phase modulated with the rotor flux position in response to a high frequency voltage signal injection. The motor current signals are envelope detected to determine zero crossing points. Samples are taken of the motor current signals at positive and negative offsets from the zero crossing point, with the samples processed to identify a direction of the rotor flux axis. Further samples of at least one motor current signal are taken with respect to a certain phase reference, and the samples compared to resolve a polarity of the rotor flux axis which is indicative of the angular position of the rotor.

Abstract translation: 通过监视与响应于高频电压信号注入的转子磁通位置幅度和相位调制的感测的电动机电流信号，来估计转子的初始位置。 电机电流信号被包络检测以确定过零点。 从零交叉点以正负偏移获取电机电流信号的样本，处理样品以识别转子磁链轴的方向。 至少一个电动机电流信号的进一步采样是相对于某一相位参考，并且所述样本被比较以解析转子磁通轴的极性，其表示转子的角位置。

公开(公告)号：US11635453B2

公开(公告)日：2023-04-25

申请号：US17378226

申请日：2021-07-16

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Dino Costanzo ,  Cheng Pan Cai ,  Xi Yu Xu

IPC: G01R19/25 ,  H02P27/08 ,  H02M1/00 ,  G01R15/14 ,  H02M7/5387

Abstract: A three-phase load is powered by a PWM (e.g., SVPWM) driven DC-AC inverter having a single shunt-topology. A shunt voltage and a branch voltage of the inverter (across a transistor to be calibrated) are measured during a second period of each SVPWM sector, and the drain-to-source resistance of the calibrated transistor is calculated. During the fourth period of each SVPWM sector, the branch voltage is measured again, and another branch voltage across another transistor is measured. Using the drain-to-source resistance of the calibrated transistor and the voltage across the calibrated transistor measured during the fourth period, the phase current through the calibrated transistor is calculated. Using the other branch voltage measured during the fourth period and the drain-to-source resistance of its corresponding transistor (known from a prior SVPWM sector), the phase current through that transistor is calculated. From the two calculated phase currents, the other phase current can be calculated.

公开(公告)号：US20160202296A1

公开(公告)日：2016-07-14

申请号：US15079302

申请日：2016-03-24

Applicant: STMicroelectronics S.r.l.

Inventor： Dino Costanzo ,  Giacomo Scelba ,  Giuseppe Scarcella

IPC: G01R19/175

CPC classification number: G01R19/175 ,  H02P6/183 ,  H02P21/18

Abstract: An estimate of the initial position of a rotor is made by monitoring sensed motor current signals which are amplitude and phase modulated with the rotor flux position in response to a high frequency voltage signal injection. The motor current signals are envelope detected to determine zero crossing points. Samples are taken of the motor current signals at positive and negative offsets from the zero crossing point, with the samples processed to identify a direction of the rotor flux axis. Further samples of at least one motor current signal are taken with respect to a certain phase reference, and the samples compared to resolve a polarity of the rotor flux axis which is indicative of the angular position of the rotor.

Abstract translation: 通过监视与响应于高频电压信号注入的转子磁通位置幅度和相位调制的感测的电动机电流信号，来估计转子的初始位置。 马达电流信号被包络检测以确定过零点。 从零交叉点以正负偏移获取电机电流信号的样本，处理样品以识别转子磁链轴的方向。 至少一个电动机电流信号的进一步采样是相对于某一相位参考，并且所述样本被比较以解析转子磁通轴的极性，其表示转子的角位置。

公开(公告)号：US20160126873A1

公开(公告)日：2016-05-05

申请号：US14533330

申请日：2014-11-05

Applicant: STMicroelectronics S.r.l.

Inventor： Dino Costanzo ,  Giacomo Scelba ,  Giuseppe Scarcella

IPC: H02P6/18

CPC classification number: G01R19/175 ,  H02P6/183 ,  H02P21/18

Abstract: An estimate of the initial position of a rotor is made by monitoring sensed motor current signals which are amplitude and phase modulated with the rotor flux position in response to a high frequency voltage signal injection. The motor current signals are envelope detected to determine zero crossing points. Samples are taken of the motor current signals at positive and negative offsets from the zero crossing point, with the samples processed to identify a direction of the rotor flux axis. Further samples of at least one motor current signal are taken with respect to a certain phase reference, and the samples compared to resolve a polarity of the rotor flux axis which is indicative of the angular position of the rotor.