公开(公告)号：US20240118596A1

公开(公告)日：2024-04-11

申请号：US18545035

申请日：2023-12-19

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Wenlin XIE ,  Zihan CHEN ,  Yanchong ZHAO

IPC: G03B17/56 ,  G05D17/02 ,  H02P6/08

CPC classification number: G03B17/561 ,  G05D17/02 ,  H02P6/08 ,  H02P2205/07

Abstract: A gimbal system includes a gimbal configured to support a load and including one or more motors configured to change an attitude of the load, one or more processors, and a memory coupled to the one or more processors and storing instructions that, when executed by the one or more processors, cause the system to obtain a target control parameter of the one or more motors, and, in response to the gimbal switching from a power-on state to a powered-off state or a sleep state, control, according to the target control parameter, a torque of at least one of the one or more motors to decrease at a first speed within a first time period and to decrease at a second speed within a second time period after the first time period. The second speed is lower than the first speed.

公开(公告)号：US20210064069A1

公开(公告)日：2021-03-04

申请号：US17096265

申请日：2020-11-12

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Wenlin XIE ,  Zihan CHEN ,  Yanchong ZHAO

IPC: G05D17/02 ,  H02P6/08 ,  G03B17/56

Abstract: A gimbal control method includes configuring, while a gimbal is in a power-on state, turning-off motor control parameters according to a mass of a camera device carried by the gimbal. The gimbal includes an electric motor. The turning-off motor control parameters are configured to control the electric motor when the gimbal is powered off or enters a sleep state. The method further includes, in response to the gimbal being powered off or entering the sleep state, controlling a torque of the electric motor to decrease gradually from a starting moment at which the gimbal is powered off or enters the sleep state according to the turning-off motor control parameters.

公开(公告)号：US20200227983A1

公开(公告)日：2020-07-16

申请号：US16832166

申请日：2020-03-27

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Zhenhao ZHOU ,  Zihan CHEN

IPC: H02K11/215 ,  H02P6/17

Abstract: A method of obtaining a mechanical position of a motor for an ESC includes obtaining magnetic field strengths of two or more Hall sensors respectively and determining the mechanical position of the motor based on the magnetic field strengths of the two or more Hall sensors. The magnetic field strengths are obtained by measuring a magnetic leakage of two or more pairs of magnetic poles by the two or more Hall sensors. The motor includes two or more Hall sensors and two or more pairs of magnetic poles. The motor is connected to the ESC; a phase difference between the two or more Hall sensors is a preset angle; and arrangements between each pair of magnetic poles and the two or more Hall sensors are different.

公开(公告)号：US20210083617A1

公开(公告)日：2021-03-18

申请号：US17103775

申请日：2020-11-24

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Wenlin XIE ,  Yi JIANG ,  Zihan CHEN

IPC: H02P29/64

Abstract: A motor control method includes obtaining a torque of a motor according to a drive signal used to drive the motor to rotate, determining a temperature of the motor according to the torque and a lasting time of the torque, and when determining that the temperature is higher than a temperature threshold, adjusting a magnitude of the drive signal to reduce the torque.

公开(公告)号：US20210067009A1

公开(公告)日：2021-03-04

申请号：US17081426

申请日：2020-10-27

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Sicong LIU ,  Jiabin YAN ,  Zihan CHEN ,  Xifeng ZHAO

IPC: H02K11/22 ,  H02K11/215 ,  H02K11/33 ,  H02K21/16

Abstract: An electric motor positioning device for an electric motor includes a photoelectric sensor and a positioning ring. The positioning ring includes a first area and a second area. The electric motor includes a rotor and a stator. The rotor is rotatably mounted on the stator. One of the photoelectric sensor and the positioning ring is fixed on the rotor and rotates with the rotor, and the other one of the photoelectric sensor and the positioning ring is fixed on the stator. A position of the photoelectric sensor relative to the positioning ring rotates within a predetermined range with a relative rotation between the rotor and the stator, and the predetermined range includes a boundary between a first area and a second area.

公开(公告)号：US20210041772A1

公开(公告)日：2021-02-11

申请号：US16988688

申请日：2020-08-09

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Wenlin XIE ,  Zihan CHEN ,  Paul PAN

IPC: G03B17/56 ,  G03B15/00 ,  G03B11/00 ,  G01H1/00 ,  F16F15/00

Abstract: A method for suppressing a vibration of a gimbal includes obtaining state information of the gimbal, determining a vibration frequency of the gimbal according to the state information, and performing an operation of suppressing the vibration of the gimbal according to the vibration frequency of the gimbal.

公开(公告)号：US20200332944A1

公开(公告)日：2020-10-22

申请号：US16920548

申请日：2020-07-03

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Tie SU ,  Zihan CHEN

IPC: F16M11/12 ,  F16M11/18

Abstract: A control method for a non-orthogonal gimbal includes obtaining an actual attitude of the gimbal, determining a target attitude of the gimbal according to the actual attitude of the gimbal and an angle between a first rotation axis of a first drive motor and a second rotation axis of a second drive motor, determining an attitude error according to the actual attitude and the target attitude, and controlling one or more of a plurality of drive motors according to the attitude error to cause the gimbal to approach the target attitude. The gimbal includes the plurality of drive motors including the first drive motor, the second drive motor, and the third drive motor. The gimbal further includes a base, a first axis arm, a second axis arm, and a third axis arm.

公开(公告)号：US20180121149A1

公开(公告)日：2018-05-03

申请号：US15853818

申请日：2017-12-24

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Ye TAO ,  Zihan CHEN ,  Zhiyuan ZHANG ,  Weifeng LIU ,  Chaobin CHEN

IPC: G06F3/14 ,  G09B9/08 ,  G05D1/00 ,  B64C39/02 ,  G09B9/12 ,  G09B19/16 ,  G09B9/48 ,  H04L29/08

Abstract: Systems, devices and methods are provided for training a user to control a gimbal in an environment. The systems and methods provide a simulation environment to control a gimbal in a virtual environment. The virtual environment closely resembles a real control environment. A controller may be used to transmit simulation commands and receive simulated data for visual display.