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1.发明授权公开(公告)号：US10608567B1
公开(公告)日：2020-03-31
申请号：US16283060
申请日：2019-02-22
Applicant: GM Global Technology Operations LLC
Inventor： Dwarakanath V. Simili , Siddharth Ballal
Abstract: A propulsion system for a device having an electric motor configured to selectively provide a first torque contribution to propel the device. At least one sensor is configured to obtain a respective signal related to the electric motor. A controller is in communication with the sensors and configured to determine a magnet flux linkage (λm) based in part on the respective signal. The controller has a processor and tangible, non-transitory memory on which instructions are recorded for a method of determining a demagnetized torque capability (TD) for the electric motor in real-time. In the event of a threshold level of demagnetization of the electric motor, the method estimates the torque capability in real time of the electric motor, taking the demagnetization level into account. At least one operating parameter of the device is controlled based at least partially on the demagnetized torque capability (TD).
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公开(公告)号：US10355631B1
公开(公告)日：2019-07-16
申请号：US15900829
申请日：2018-02-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Caleb W. Secrest , Brent S. Gagas , Dwarakanath V. Simili
Abstract: A current regulator is provided for an electric machine drive system for driving an electric machine. The current regulator is configurable to operate in a first configuration or a second configuration depending on a synchronous speed of the electric machine. A controller can configure an operational mode of the current regulator by selecting, based on the synchronous speed of the electric machine, either the first configuration of the current regulator or the second configuration of the current regulator as a currently active configuration, and can then execute the current regulator in accordance with the currently active configuration. The first configuration of the current regulator comprises a first set of elements and cross-coupling gain blocks, whereas the second configuration of the current regulator can include the first set of elements without the cross-coupling gain blocks. The first set elements can vary depending on the implementation, but can generally include: summing junctions, integrators, and gain blocks. In one embodiment, the current regulator is configured to operate as a complex vector current regulator when configured in the first configuration, and is configured to operate as a state feedback decoupling (SFbD) current regulator when configured in the second configuration.
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公开(公告)号：US09774287B1
公开(公告)日：2017-09-26
申请号：US15210179
申请日：2016-07-14
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Dwarakanath V. Simili , Bon Ho Bae , Aayush Gupta
CPC classification number: H02P21/0089
Abstract: An electric machine assembly includes an electric machine having a stator configured to have a stator current and a controller configured to receive a torque command (T). The controller has a processor and tangible, non-transitory memory on which is recorded instructions for executing a method of modifying the stator current for enhanced flux weakening. The controller is programmed to obtain a base stator current [IdLU, IqLU] from a look-up table based at least partially on the torque command (T). The controller is programmed to obtain a characteristic angle (θi, i=1, 2, 3) based at least partially on a value of the torque command (T) and the base stator current [IdLU, IqLU]. A stator current modifier [ΔId, ΔIq] is obtained based at least partially on the characteristic angle (θi, i=1, 2, 3) and a flux weakening factor (ΔIS) such that: ΔId=(ΔIS*cosine (θi)) and ΔIq=(ΔIS*sine (θi)).
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公开(公告)号：US20170126166A1
公开(公告)日：2017-05-04
申请号：US14932613
申请日：2015-11-04
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Dwarakanath V. Simili , Jihoon Jang , Sinisa Jurkovic
CPC classification number: G01R31/343 , H02P21/14 , H02P21/143 , H02P23/14 , H02P29/64
Abstract: An electric machine assembly includes an electric machine having a stator and a rotor. The stator has stator windings at a stator winding temperature (tS) and the rotor is configured to rotate at a rotor speed (ω). A controller is operatively connected to the electric machine and has a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for determining stator winding resistance. The controller is configured to determine a high-speed resistance factor (rH) which is based at least partially on the torque command (T*), the stator winding temperature (tS), the rotor speed (ω), a characterized torque error and the number of pole pairs (P). The controller may determine a total resistance value (R) based on a weighting factor (k), the high-speed resistance factor (rH) and the low-speed resistance factor (rL).
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公开(公告)号：US20200228049A1
公开(公告)日：2020-07-16
申请号：US16245402
申请日：2019-01-11
Applicant: GM Global Technology Operations LLC
Inventor： Anno Yoo , Yo Chan Son , Dwarakanath V. Simili
Abstract: An electric motor control system of a vehicle includes a temperature module configured to, based on a motor torque request, (i) determine a plurality of stator current values based on a plurality of temperatures and (ii) generate a maximum stator current based on a lowest value of the plurality of stator current values. A torque module configured to, based on the maximum stator current, the motor torque request, and a maximum allowable flux, generate a maximum torque output. A current command module configured to, based on a speed of a rotor of the electric motor and the maximum torque output, generate a d-axis current adjustment and a q-axis current adjustment. A switching control module configured to, based on the d- and q-axis current adjustments, control switching of an inverter module and apply power to stator windings of the electric motor from an energy storage device.
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Patent Agency Ranking
公开(公告)号：US10396696B1
公开(公告)日：2019-08-27
申请号：US15900828
申请日：2018-02-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Brent S. Gagas , Dwarakanath V. Simili , Caleb W. Secrest
Abstract: A current regulator is provided for an electric machine drive system for driving an electric machine. The current regulator includes an adjustable damping module that has a value of virtual damping resistance that is applied at the current regulator. The value of virtual damping resistance is adjustable as a function of sampling frequency. A controller can control the current regulator by determining whether the sampling frequency has changed since a previous execution cycle of the current regulator, and when the sampling frequency has changed since the previous execution cycle, the controller can modify the damping value as a function of the sampling frequency to allow the damping value to change with the sampling frequency. The damping value has a new value of virtual damping resistance that is applied at the current regulator after modifying the damping value. The controller can then execute the current regulator in accordance with the modified damping value to generate the voltage commands.
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公开(公告)号：US09973120B1
公开(公告)日：2018-05-15
申请号：US15492644
申请日：2017-04-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Dwarakanath V. Simili , Anno Yoo , Yo Chan Son
CPC classification number: H02P6/08
Abstract: An electric machine assembly includes an electric machine having a stator configured to have a stator current and a controller configured to receive a torque command (T). The controller stores a modulation flag (Fm) and a six step active flag (FS), each having a respective status. The controller has a processor and tangible, non-transitory memory on which is recorded instructions for executing a method of controlling a six step pulse width modulation operation in the assembly. The controller is programmed to determine the respective status of a six step active flag (FS) based at least partially on the torque command (T) and the respective status of the modulation flag (Fm). The controller is configured to control at least one operating parameter of the electric machine based at least partially on the respective status of the six step active flag (FS).
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公开(公告)号：US20170126167A1
公开(公告)日：2017-05-04
申请号：US14932603
申请日：2015-11-04
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Dwarakanath V. Simili , Jihoon Jang
CPC classification number: H02P21/141 , B60L2220/50 , H02P29/032 , H02P29/60 , H02P29/64 , H02P29/662 , H02P2207/05
Abstract: An electric machine assembly has an electric machine having a stator and a rotor. The rotor has a rotor temperature and is configured to rotate at a rotor speed (ω). The stator has stator windings at a stator winding temperature (tS) and the electric machine defines a number of pole pairs (P). A controller is operatively connected to the electric machine and is configured to receive a torque command (T*). The controller has a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for determining a total permanent magnetic flux (ψT) as a function of the rotor temperature. Execution of the instructions by the processor causes the controller to determine a high-speed magnetic flux factor (ψH) and a low-speed magnetic flux factor (ψL).
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公开(公告)号：US10700632B1
公开(公告)日：2020-06-30
申请号：US16245402
申请日：2019-01-11
Applicant: GM Global Technology Operations LLC
Inventor： Anno Yoo , Yo Chan Son , Dwarakanath V. Simili
Abstract: An electric motor control system of a vehicle includes a temperature module configured to, based on a motor torque request, (i) determine a plurality of stator current values based on a plurality of temperatures and (ii) generate a maximum stator current based on a lowest value of the plurality of stator current values. A torque module configured to, based on the maximum stator current, the motor torque request, and a maximum allowable flux, generate a maximum torque output. A current command module configured to, based on a speed of a rotor of the electric motor and the maximum torque output, generate a d-axis current adjustment and a q-axis current adjustment. A switching control module configured to, based on the B- and q-axis current adjustments, control switching of an inverter module and apply power to stator windings of the electric motor from an energy storage device.
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公开(公告)号：US20190260319A1
公开(公告)日：2019-08-22
申请号：US15900828
申请日：2018-02-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Brent S. Gagas , Dwarakanath V. Simili , Caleb W. Secrest
Abstract: A current regulator is provided for an electric machine drive system for driving an electric machine. The current regulator includes an adjustable damping module that has a value of virtual damping resistance that is applied at the current regulator. The value of virtual damping resistance is adjustable as a function of sampling frequency. A controller can control the current regulator by determining whether the sampling frequency has changed since a previous execution cycle of the current regulator, and when the sampling frequency has changed since the previous execution cycle, the controller can modify the damping value as a function of the sampling frequency to allow the damping value to change with the sampling frequency. The damping value has a new value of virtual damping resistance that is applied at the current regulator after modifying the damping value. The controller can then execute the current regulator in accordance with the modified damping value to generate the voltage commands.
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