Patents by Inventor Changjiu Liu

Changjiu Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240072562
    Abstract: A motor control circuit includes a first switch module, a three-phase inverter, and a control module. A power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop; midpoints of three phase legs of the three-phase inverter are respectively connected to three phase coils of the three-phase alternating current motor; the three-phase alternating current motor is configured to input or output a current by using a wire N extending from a connection point of the three phase coils; the control module is connected to the three-phase inverter, first switch module, three-phase alternating current motor, and power supply module; the control module is configured to control the three-phase inverter to enable the motor control circuit to receive a voltage of the power supply module and output a direct current, and to boost a voltage of the power supply module.
    Type: Application
    Filed: November 9, 2023
    Publication date: February 29, 2024
    Inventors: Changjiu LIU, Hua PAN, Ronghua NING, Yang LIU, Ning YANG
  • Patent number: 11916504
    Abstract: An energy conversion device is provided. The energy conversion device includes a reversible pulse-width modulation (PWM) rectifier (102) and a motor coil (103). The motor coil (103) includes L sets of winding units, and each set of winding unit is connected with the reversible PWM rectifier (102), where L?2 and is a positive integer. At least two sets of heating circuits of a to-be-heated device are formed by an external power supply (100), the reversible PWM rectifier (102), and the winding units in the motor coil (103). The energy conversion device controls the reversible PWM rectifier (102) according to a control signal, so that a current outputted from the external power supply (100) flows through at least two sets of winding units in the motor coil (103) to generate heat.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: February 27, 2024
    Assignee: BYD COMPANY LIMITED
    Inventors: Heping Ling, Jicheng Li, Changjiu Liu, Feiyue Xie, Yuxin Zhang
  • Patent number: 11876396
    Abstract: A motor control circuit includes a first switch module, a three-phase inverter, and a control module, where a power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop, the three-phase alternating current motor inputs or outputs a current by using a wire N extending from a connection point of three phase coils, and the control module controls the three-phase inverter, so that the motor control circuit receives a voltage of the power supply module and outputs a direct current. A wire N extends from the three-phase alternating current motor, and further forms different charging loops with the three-phase inverter, the three-phase alternating current motor, and the power battery.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: January 16, 2024
    Assignee: BYD COMPANY LIMITED
    Inventors: Changjiu Liu, Hua Pan, Ronghua Ning, Yang Liu, Ning Yang
  • Publication number: 20230268862
    Abstract: An energy conversion apparatus includes: a first switch module, a motor inverter having a first bus terminal connected with a first end of a battery and a second bus terminal connected with a second end of the battery through the first switch module, a motor winding having a first end connected with a midpoint end of the motor inverter, and a second switch module and a first capacitor connected in series. A first end of the serial-connected second switch module and the first capacitor is connected with a second end of the motor winding. A second end of the serial-connected second switch module and the first capacitor is connected with the second bus terminal.
    Type: Application
    Filed: June 4, 2021
    Publication date: August 24, 2023
    Inventors: Yubo LIAN, Heping LING, Changjiu LIU, Haijun LIU, Yunfeng WU
  • Publication number: 20220329195
    Abstract: An energy conversion device is provided. The energy conversion device includes a reversible pulse-width modulation (PWM) rectifier (102) and a motor coil (103). The motor coil (103) includes L sets of winding units, and each set of winding unit is connected with the reversible PWM rectifier (102), where L?2 and is a positive integer. At least two sets of heating circuits of a to-be-heated device are formed by an external power supply (100), the reversible PWM rectifier (102), and the winding units in the motor coil (103). The energy conversion device controls the reversible PWM rectifier (102) according to a control signal, so that a current outputted from the external power supply (100) flows through at least two sets of winding units in the motor coil (103) to generate heat, and cause a vector sum of resultant current vectors of the at least two sets of the winding units on a quadrature axis of a synchronous rotating reference frame based on rotor field orientation of the motor to be zero.
    Type: Application
    Filed: August 18, 2020
    Publication date: October 13, 2022
    Inventors: Heping LING, Jicheng LI, Changjiu LIU, Feiyue XIE, Yuxin ZHANG
  • Publication number: 20220294380
    Abstract: The disclosure provides a motor and an energy conversion device. The motor includes a motor coil having x sets of windings. A number of phases of the x sets of windings is mx. In each of the x sets of windings, each phase winding includes nx coil branches. A first end of each of the nx coil branches is connected with a first end of a coil branch separated from the coil branch by an electrical angle of 360 degrees, to form mx phase endpoints. A second end of each of the nx coil branches of each phase winding is connected with a second end of a coil branch separated from the coil branch by an electrical angle of P*(360*k1+360/mx) degrees to form nx neutral points, nx?mx?2, nx?3, p=±1, 1?k1?(nx?1), and mx, nx, and k1 are integers.
    Type: Application
    Filed: August 13, 2020
    Publication date: September 15, 2022
    Inventors: Feiyue XIE, Changjiu LIU, Jicheng LI, Lei HU, Yihao ZHENG
  • Publication number: 20220077709
    Abstract: The present disclosure provides a power battery charging method, a motor control circuit, and a vehicle. The motor control circuit includes a first switch module, a three-phase inverter, and a control module, where a power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop, the three-phase alternating current motor inputs or outputs a current by using a wire N extending from a connection point of three phase coils, and the control module controls the three-phase inverter, so that the motor control circuit receives a voltage of the power supply module and outputs a direct current. In the technical solutions, a wire N extends from the three-phase alternating current motor, and further forms different charging loops with the three-phase inverter, the three-phase alternating current motor, and the power battery.
    Type: Application
    Filed: December 17, 2019
    Publication date: March 10, 2022
    Inventors: Changjiu LIU, Hua PAN, Ronghua NING, Yang LIU, Ning YANG
  • Patent number: 10059172
    Abstract: A hybrid vehicle, an air conditioning system and a method for controlling the air conditioning system are provided. The air conditioning system includes: an electric compressor; a mechanical compressor, connected with the electric compressor in parallel; a power battery, connected with the electric compressor and configured to supply power to the electric compressor; an engine, connected with the mechanical compressor and configured to supply a power source to the mechanical compressor; an engine controller, connected with the engine and configured to start the engine when the mechanical compressor is to be started; a battery manager, connected with the power battery and configured to detect a state of charge of the power battery; and a controller, connected with the engine controller and the battery manager and configured to start the electric compressor and the mechanical compressor at different time according to the state of charge of the power battery.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: August 28, 2018
    Assignee: BYD Company Limited
    Inventors: Changjiu Liu, Guorui Liu, Zhichun Li, Jiewen Li, Yanzhang Wei
  • Patent number: 9889841
    Abstract: A method for starting an engine of a hybrid vehicle is provided. The method includes: detecting a speed of the hybrid vehicle when receiving an instruction to start the engine; and outputting an inertia torque generated by a transmission of the hybrid vehicle to a crankshaft of the engine to start the engine when the speed is larger than or equal to a predetermined speed. Further, a system for starting an engine of a hybrid vehicle and a hybrid vehicle including the system are provided.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: February 13, 2018
    Assignee: BYD COMPANY LIMITED
    Inventors: Changjiu Liu, Guorui Liu, Xiaowei Zhou, Heping Ling, Shibin Xie, Yubo Lian
  • Patent number: 9840251
    Abstract: The present disclosure provides a hybrid electric vehicle, a drive control method and a drive control device of a hybrid electric vehicle. The drive control method includes: obtaining a current gear position of the hybrid electric vehicle and a current electric charge level of a power battery; obtaining a slope of a road on which the hybrid electric vehicle is driving, if the current gear position of the hybrid electric vehicle and the current electric charge level of the power battery meet a preset requirement; and causing a working state of an engine and/or a motor of the hybrid electric vehicle according to the slope of the road on which the hybrid electric vehicle is driving.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: December 12, 2017
    Assignee: BYD COMPANY LIMITED
    Inventors: Yubo Lian, Heping Ling, Changjiu Liu, Guorui Liu, Dongyue Huang
  • Patent number: 9821793
    Abstract: The present disclosure provides a hybrid electric vehicle, a drive control method and a drive control device of a hybrid electric vehicle. The drive control method includes: obtaining a current gear position of the hybrid electric vehicle and a current electric charge level of a power battery; determining whether the vehicle is within a speed start-stop interval according to the current gear position of the hybrid electric vehicle and the current electric charge level of the power battery; obtaining a slope of a road on which the vehicle is driving and a current speed of the hybrid electric vehicle, if the vehicle is within a speed start-stop interval; and controlling a working state of an engine and/or a motor of the hybrid electric vehicle according to the slope of the road on which the vehicle is driving and the current speed of the vehicle.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: November 21, 2017
    Assignee: BYD COMPANY LIMITED
    Inventors: Yubo Lian, Heping Ling, Changjiu Liu, Guorui Liu, Chengming Lai, Guizhong Li
  • Patent number: 9789758
    Abstract: A hybrid vehicle, a front cabin and a method for controlling the front cabin are provided. The front cabin includes: a sheet metal and a front subframe. The front cabin is configured to house an engine, a motor, a motor controller, a transmission and a support assembly. The engine and the motor are connected to the transmission respectively; the engine is disposed on the right side of the front cabin; the transmission is disposed on the left side of the front cabin; the motor is disposed on the left side of the front cabin and above the transmission; and the motor controller is disposed above the transmission and located at the front of the motor.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: October 17, 2017
    Assignee: BYD COMPANY LIMITED
    Inventors: Ziqiang Zhao, Pan Lin, Changjiu Liu
  • Publication number: 20170001494
    Abstract: A hybrid vehicle, an air conditioning system and a method for controlling the air conditioning system are provided. The air conditioning system includes: an electric compressor; a mechanical compressor, connected with the electric compressor in parallel; a power battery, connected with the electric compressor and configured to supply power to the electric compressor; an engine, connected with the mechanical compressor and configured to supply a power source to the mechanical compressor; an engine controller, connected with the engine and configured to start the engine when the mechanical compressor is to be started; a battery manager, connected with the power battery and configured to detect a state of charge of the power battery; and a controller, connected with the engine controller and the battery manager and configured to start the electric compressor and the mechanical compressor at different time according to the state of charge of the power battery.
    Type: Application
    Filed: December 16, 2014
    Publication date: January 5, 2017
    Applicant: BYD Company Limited
    Inventors: CHANGJIU LIU, GUORUI LIU, ZHICHUN LI, JIEWEN LI, YANZHANG WEI
  • Publication number: 20160304082
    Abstract: A method for starting an engine of a hybrid vehicle is provided. The method includes: detecting a speed of the hybrid vehicle when receiving an instruction to start the engine; and outputting an inertia torque generated by a transmission of the hybrid vehicle to a crankshaft of the engine to start the engine when the speed is larger than or equal to a predetermined speed. Further, a system for starting an engine of a hybrid vehicle and a hybrid vehicle including the system are provided.
    Type: Application
    Filed: December 16, 2014
    Publication date: October 20, 2016
    Inventors: CHANGJIU LIU, GUORUI LIU, XIAOWEI ZHOU, HEPING LING, SHIBIN XIE, YUBO LIAN
  • Publication number: 20160280213
    Abstract: The present disclosure provides a hybrid electric vehicle, a drive control method and a drive control device of a hybrid electric vehicle. The drive control method includes: obtaining a current gear position of the hybrid electric vehicle and a current electric charge level of a power battery; determining whether the vehicle is within a speed start-stop interval according to the current gear position of the hybrid electric vehicle and the current electric charge level of the power battery; obtaining a slope of a road on which the vehicle is driving and a current speed of the hybrid electric vehicle, if the vehicle is within a speed start-stop interval; and controlling a working state of an engine and/or a motor of the hybrid electric vehicle according to the slope of the road on which the vehicle is driving and the current speed of the vehicle.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 29, 2016
    Inventors: Yubo LIAN, Heping LING, Changjiu LIU, Guorui LIU, Chengming LAI, Guizhong LI
  • Publication number: 20160280204
    Abstract: The present disclosure provides a hybrid electric vehicle, a drive control method and a drive control device of a hybrid electric vehicle. The drive control method includes: obtaining a current gear position of the hybrid electric vehicle and a current electric charge level of a power battery; obtaining a slope of a road on which the hybrid electric vehicle is driving, if the current gear position of the hybrid electric vehicle and the current electric charge level of the power battery meet a preset requirement; and causing a working state of an engine and/or a motor of the hybrid electric vehicle according to the slope of the road on which the hybrid electric vehicle is driving.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 29, 2016
    Inventors: Yubo LIAN, Heping LING, Changjiu LIU, Guorui LIU, Dongyue HUANG
  • Publication number: 20160031308
    Abstract: A hybrid vehicle, a front cabin and a method for controlling the front cabin are provided. The front cabin includes: a sheet metal and a front subframe. The front cabin is configured to house an engine, a motor, a motor controller, a transmission and a support assembly. The engine and the motor are connected to the transmission respectively; the engine is disposed on the right side of the front cabin; the transmission is disposed on the left side of the front cabin; the motor is disposed on the left side of the front cabin and above the transmission; and the motor controller is disposed above the transmission and located at the front of the motor.
    Type: Application
    Filed: October 14, 2015
    Publication date: February 4, 2016
    Inventors: Ziqiang ZHAO, Pan LIN, Changjiu LIU
  • Patent number: D699631
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: February 18, 2014
    Assignee: BYD Company Ltd.
    Inventors: Yubo Lian, Ka Dan, Changjiu Liu, Wenquan Tang, Changshu Shangguan, Jihan Fan