-
Patent Agency Ranking
公开(公告)号：US20250038595A1
公开(公告)日：2025-01-30
申请号：US18361289
申请日：2023-07-28
Applicant: GM Global Technology Operations LLC
Inventor： Mazharul Chowdhury , Le Chang , William Robert Jensen , Mohammad F. Momen , Alan Del Rio
Abstract: An interior permanent magnet electric machine includes a stator and a rotor. The rotor features a rotor core with slots extending between its opposite ends. These slots contain a segmented magnet assembly, which includes magnet segments of different magnetic materials. The segmented magnet assembly may be divided radially, axially, circumferentially or combinations thereof and may include outer magnet segments made of the first magnetic material and inner magnet segments made of the second magnetic material. Additionally, the segmented magnet assembly includes magnetic poles that are aligned in radial, axial, or circumferential directions.
-
公开(公告)号：US12119763B2
公开(公告)日：2024-10-15
申请号：US17979215
申请日：2022-11-02
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Vinod Chowdary Peddi , Cheng Gong , Le Chang , Song He
Abstract: A propulsion system for a device includes an electric motor configured to generate torque to propel the device. A controller is in communication with the electric motor and is adapted to select at least one harmonic order for a harmonic current command. The controller is adapted to define a plurality of operating regions, including a first operating region, a second operating region and a third operating region, each associated with a respective objective function for generating the harmonic current command. The controller is adapted to operate the harmonic current command with four degrees of freedom by selectively varying a q-axis current magnitude, a d-axis current magnitude, a q-axis phase and a d-axis phase as a function of the torque and a motor speed.
-
公开(公告)号：US20240154555A1
公开(公告)日：2024-05-09
申请号：US17979215
申请日：2022-11-02
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Vinod Chowdary Peddi , Cheng Gong , Le Chang , Song He
IPC: H02P21/22
CPC classification number: H02P21/22
Abstract: A propulsion system for a device includes an electric motor configured to generate torque to propel the device. A controller is in communication with the electric motor and is adapted to select at least one harmonic order for a harmonic current command. The controller is adapted to define a plurality of operating regions, including a first operating region, a second operating region and a third operating region, each associated with a respective objective function for generating the harmonic current command. The controller is adapted to operate the harmonic current command with four degrees of freedom by selectively varying a q-axis current magnitude, a d-axis current magnitude, a q-axis phase and a d-axis phase as a function of the torque and a motor speed.
-
公开(公告)号：US20230198439A1
公开(公告)日：2023-06-22
申请号：US17555707
申请日：2021-12-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad Hussain Alvi , Le Chang , Suresh Gopalakrishnan
Abstract: A motor control system includes: a voltage command module configured to determine a target d-axis voltage for an electric motor and a target q-axis voltage for the electric motor; a target frequency module configured to: selectively set a target switching frequency to a first predetermined switching frequency; and selectively set the target switching frequency to a second predetermined switching frequency that is at least 2 kilohertz (kHz) greater than the first predetermined switching frequency; and a switching module configured to: based on the target d-axis voltage and the target q-axis voltage, determine target pulse width modulation (PWM) duty cycles for phases, respectively, of the electric motor; and switch switches of legs of an inverter module connected to the phases of the electric motor at the target PWM duty cycles, respectively, and the target switching frequency.
-
公开(公告)号：US11689133B1
公开(公告)日：2023-06-27
申请号：US17555707
申请日：2021-12-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad Hussain Alvi , Le Chang , Suresh Gopalakrishnan
Abstract: A motor control system includes: a voltage command module configured to determine a target d-axis voltage for an electric motor and a target q-axis voltage for the electric motor; a target frequency module configured to: selectively set a target switching frequency to a first predetermined switching frequency; and selectively set the target switching frequency to a second predetermined switching frequency that is at least 2 kilohertz (kHz) greater than the first predetermined switching frequency; and a switching module configured to: based on the target d-axis voltage and the target q-axis voltage, determine target pulse width modulation (PWM) duty cycles for phases, respectively, of the electric motor; and switch switches of legs of an inverter module connected to the phases of the electric motor at the target PWM duty cycles, respectively, and the target switching frequency.
-
-
-
-
Search Results
5
records
(took 0.013 seconds)
