Patents Assigned to Global Mixed-mode Technology Inc.
  • Patent number: 12255563
    Abstract: A motor controller comprises a switch circuit, a control unit, and a pulse width modulation signal, where the pulse width modulation signal has a duty cycle. The motor controller is used for driving a motor, where the motor has a coil. The switch circuit is configured to supply a coil current to the coil. The control unit is configured to generate a plurality of control signals to control the switch circuit. When the motor controller enters an early alignment state, the motor controller enables the coil current to achieve a predetermined value within one electric period. When the coil current achieves the predetermined value, the control unit records the duty cycle. The motor controller is configured to increase a success rate of starting the motor.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: March 18, 2025
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chien-Lun Chu
  • Patent number: 12212267
    Abstract: A motor controller comprises a switch circuit, a control circuit, and a function pin. The switch circuit is coupled to a motor for driving the motor. The control circuit generates a plurality of control signals to control the switch circuit. The function pin is coupled to the control circuit for receiving a function signal. The function signal is configured to inform the motor controller to execute a braking function. The braking function enables a braking time to be a variable value.
    Type: Grant
    Filed: December 19, 2022
    Date of Patent: January 28, 2025
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Guang-Nan Tzeng
  • Patent number: 12143054
    Abstract: A motor unit comprises a driving circuit, a control unit, an analog-to-digital converter, a voltage divider, and a voltage converter. The driving circuit is coupled to a motor for driving the motor. The control unit is configured to generate a plurality of control signals to control the driving circuit. The analog-to-digital converter receives an output voltage for generating a digital signal to the control unit. The voltage divider receives an input voltage for generating a first voltage. The voltage converter converts a power supply voltage into the input voltage. The motor unit may execute a prevention mechanism to avoid misjudging the digital signal. The motor unit may be applied to a high-voltage configuration.
    Type: Grant
    Filed: November 14, 2021
    Date of Patent: November 12, 2024
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chien-Lun Chu
  • Patent number: 12021475
    Abstract: A motor controller is used for driving a motor, where the motor has a motor coil. The motor controller comprises a switch circuit, a control unit, and a phase detecting unit. The switch circuit is configured to supply a coil current to the motor coil. The control unit generates a plurality of control signals to control the switch circuit. The phase detecting unit generates a phase signal to the control unit. When the phase signal is changed from a first level to a second level, the motor controller starts a phase delay mechanism to reduce the risk of reverse flow of the coil current. The phase delay mechanism lasts a time. The motor controller may utilize the phase delay mechanism in a start mode or a normal operation mode.
    Type: Grant
    Filed: February 18, 2021
    Date of Patent: June 25, 2024
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Guang-Nan Tzeng
  • Publication number: 20240204699
    Abstract: A motor controller comprises a switch circuit, a control circuit, and a function pin. The switch circuit is coupled to a motor for driving the motor. The control circuit generates a plurality of control signals to control the switch circuit. The function pin is coupled to the control circuit for receiving a function signal. The function signal is configured to inform the motor controller to execute a braking function. The braking function enables a braking time to be a variable value.
    Type: Application
    Filed: December 19, 2022
    Publication date: June 20, 2024
    Applicant: Global Mixed-mode Technology Inc.
    Inventor: Guang-Nan Tzeng
  • Patent number: 11936326
    Abstract: A motor controller comprises a switch circuit, a control unit, and a duty cycle processing unit. The switch circuit is coupled to a motor for driving the motor. The control unit is configured to generate a plurality of control signals to control the switch circuit. The duty cycle processing unit receives a first pulse width modulation signal, where the first pulse width modulation has a first duty cycle. The duty cycle processing unit is configured to judge if the first duty cycle is equal to 0% or 100%. The duty cycle processing unit comprises a duty cycle computing unit, where the duty cycle computing unit is configured to capture the first duty cycle.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: March 19, 2024
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chia-Tai Yang
  • Patent number: 11876478
    Abstract: A motor controller comprises a switch circuit and a control unit. The switch circuit is coupled to a motor for driving the motor. The control unit is configured to generate a control signal to control the switch circuit. The motor controller is configured to generate a current signal and a voltage signal. When a current phase of the current signal is at a predetermined crossing phase, the motor controller calculates a difference value between the current phase of the current signal and a voltage phase of the voltage signal, where the motor controller is configured to control the difference value. The motor controller may stabilize the motor and avoid noise by modulating the difference value. The motor controller may modulate the difference value, such that the difference value is equal to a predetermined phase difference.
    Type: Grant
    Filed: July 13, 2021
    Date of Patent: January 16, 2024
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chi-Hong Su
  • Publication number: 20240014761
    Abstract: A motor controller comprises a switch circuit and a driving circuit. The switch circuit is coupled to a motor for driving the motor. The driving circuit generates a plurality of control signals to control the switch circuit. The motor controller is configured to crop a first waveform into a second waveform, where the first waveform is transformed into the second waveform gradually. Moreover, the motor controller is configured to transform the second waveform into the first waveform, where the second waveform is transformed into the first waveform gradually. The first waveform may be an M-shaped waveform, a W-shaped waveform, or a sinusoidal waveform. The second waveform may be a trapezoidal waveform.
    Type: Application
    Filed: July 7, 2022
    Publication date: January 11, 2024
    Applicant: Global Mixed-mode Technology Inc.
    Inventor: Chi-Hong Su
  • Patent number: 11863097
    Abstract: A motor controller comprises a switch circuit, a driving circuit, and a pulse width modulation circuit. The switch circuit is coupled to a three-phase motor for driving the three-phase motor. The driving circuit generates a plurality of control signals to control the switch circuit. When the motor controller starts a floating phase for detecting a phase switching time point, the motor controller enables that at least one transistor within the switch circuit is operated in a linear region. The motor controller is configured to reduce switching noise of the three-phase motor and increase a success rate of phase switching.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: January 2, 2024
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chien-Lun Chu
  • Patent number: 11804794
    Abstract: A motor controller comprises a switch circuit and a control unit. The motor controller is used for driving a motor, where the motor has a coil. The switch circuit is configured to supply a coil current to the coil. The control unit is configured to generate a plurality of control signals to control the switch circuit. The motor controller enables a floating phase time to be a variable value, where the floating phase time has a stable interval and a detecting interval. The motor controller enables a zero point of the coil current to appear in the stable interval, so as to detect a phase switching time point in a stable way and avoid a noise problem. The motor controller detects a zero crossing point of a back electromotive force in the detecting interval.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: October 31, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chien-Lun Chu
  • Patent number: 11791696
    Abstract: A motor controller comprises a switch circuit, a driving circuit, a pulse width modulation circuit, and a Hall sensor. The switch circuit is coupled to a three-phase motor for driving the three-phase motor. The driving circuit generates a plurality of control signals to control the switch circuit. The pulse width modulation circuit generates a pulse width modulation signal to the driving circuit. The pulse width modulation signal has a duty cycle. The Hall sensor is coupled to the pulse width modulation circuit for generating a Hall signal. When the duty cycle is less than an alignment duty cycle, the motor controller generates an alignment waveform based on the initial value of the Hall signal. The alignment waveform may be a part of an M-shaped waveform.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: October 17, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chia-Tai Yang
  • Publication number: 20230318509
    Abstract: A motor controller comprises a switch circuit, a driving circuit, and a pulse width modulation circuit. The switch circuit is coupled to a three-phase motor for driving the three-phase motor. The driving circuit generates a plurality of control signals to control the switch circuit. When the motor controller starts a floating phase for detecting a phase switching time point, the motor controller enables that at least one transistor within the switch circuit is operated in a linear region. The motor controller is configured to reduce switching noise of the three-phase motor and increase a success rate of phase switching.
    Type: Application
    Filed: March 31, 2022
    Publication date: October 5, 2023
    Applicant: Global Mixed-mode Technology Inc.
    Inventor: Chien-Lun Chu
  • Patent number: 11764709
    Abstract: A motor controller comprises a switch circuit and a control unit. The switch circuit is coupled to a motor for driving the motor. The control unit generates a control signal to control the switch circuit. The motor controller determines a non-excitation time. When the motor is in a locked state, the motor controller enables the non-excitation time to be a variable value. The motor controller utilizes the non-excitation time to achieve a lock protection function. The motor controller determines whether the motor is in the locked state by detecting a rotor speed or a rotor temperature. Moreover, the motor controller further comprises a driving signal, where the driving signal has the non-excitation time.
    Type: Grant
    Filed: July 15, 2021
    Date of Patent: September 19, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Ching-Feng Lai
  • Patent number: 11722083
    Abstract: A motor controller comprises a switch circuit, a pre-driver, a duty cycle control circuit, a current limit circuit, a pulse width modulation control unit, and a resistor. The motor controller is configured to drive a motor, where the motor has a motor coil and a maximum rated current. The switch circuit is configured to supply a motor current to the motor coil. The pre-driver generates a plurality of driving signals to control the switch circuit. The current limit circuit may store a current limit graph. The motor controller attains a function of maintaining a fixed output power by a plurality of current limit values, where each of the current limit values is less than or equal to the maximum rated current.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: August 8, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chien-Lun Chu
  • Patent number: 11721973
    Abstract: An overvoltage protection circuit which can be applied to a motor controller is provided. The overvoltage protection circuit is coupled to an input terminal for receiving an input voltage. The overvoltage protection circuit comprises a switch circuit, a controller, and a comparing unit. When the input voltage is greater than a first voltage, a discharging mechanism is forced to start so as to suppress a voltage spike. When the input voltage is less than a second voltage, the discharging mechanism is closed so as to operate normally.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: August 8, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Rong-Chin Lee
  • Patent number: 11699964
    Abstract: A motor controller comprises a switch circuit and a control unit. The switch circuit is coupled to a motor for driving the motor. The control unit is configured to generate a plurality of control signals to control the switch circuit. The motor controller sequentially determines a first phase, a second phase, a third phase, and a fourth phase based on a rotation direction. When the motor controller is in the first phase and the motor controller is unable to detect a phase switching time point within a starting time, the motor controller switches from the first phase to the second phase, the third phase, or the fourth phase. The motor controller is configured to increase a success rate of starting the motor.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: July 11, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Guang-Nan Tzeng
  • Patent number: 11699965
    Abstract: A fan motor controller comprises a pulse width modulation signal, a switch circuit, a control unit, and a frequency judging unit. The switch circuit is coupled to a fan motor for supplying a driving current to the fan motor. The control unit generates a control signal to the switch circuit, so as to control the switch circuit. The frequency judging unit receives the pulse width modulation signal for generating a judging signal to the control unit. The pulse width modulation signal is configured to adjust a speed of a fan. The pulse width modulation signal has a frequency. Based on the frequency and a judgment rule, the fan motor controller is configured to attain the function of switching between the forward direction and the reverse direction of the fan.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: July 11, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chia-Tai Yang
  • Patent number: 11658591
    Abstract: A motor controller is configured to stabilize the motor current. The motor controller is used for driving a motor. The motor controller comprises a switch circuit, a control unit, and a phase detecting unit. The phase detecting unit generates a phase signal to the control unit for switching phases. The phase signal sequentially generates a first, second, third, fourth, fifth and sixth time interval. The first to sixth time intervals correspond to first to sixth phases, respectively. The motor controller further comprises a first driving time for driving the motor in the fifth phase, where the first driving time is related to the first time interval. The motor controller further comprises a second driving time for driving the motor in the sixth phase, where the second driving time is related to the second time interval.
    Type: Grant
    Filed: November 26, 2020
    Date of Patent: May 23, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventor: Chien-Lun Chu
  • Publication number: 20230155525
    Abstract: A motor unit comprises a driving circuit, a control unit, an analog-to-digital converter, a voltage divider, and a voltage converter. The driving circuit is coupled to a motor for driving the motor. The control unit is configured to generate a plurality of control signals to control the driving circuit. The analog-to-digital converter receives an output voltage for generating a digital signal to the control unit. The voltage divider receives an input voltage for generating a first voltage. The voltage converter converts a power supply voltage into the input voltage. The motor unit may execute a prevention mechanism to avoid misjudging the digital signal. The motor unit may be applied to a high-voltage configuration.
    Type: Application
    Filed: November 14, 2021
    Publication date: May 18, 2023
    Applicant: Global Mixed-mode Technology Inc.
    Inventor: Chien-Lun Chu
  • Patent number: 11611704
    Abstract: A motor controller used for driving a motor is provided. The motor includes a motor coil and a maximum rated current. The motor controller comprises a driving circuit, a control unit, a digital-to-analog converter, an operational amplifier, a switch circuit, and a resistor. When it is needed to decrease a settling time for the motor to reach a target position, or a vibration is detected within a camera module so as to enable an image stabilization mechanism, it is capable of temporarily supplying a driving current greater than the maximum rated current to the motor coil.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: March 21, 2023
    Assignee: Global Mixed-mode Technology Inc.
    Inventors: Wei-Yu Chen, Ching-Lung Tsai