Patents by Inventor Ya-Tsung Feng

Ya-Tsung Feng 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).

  • Patent number: 9461581
    Abstract: A shadowing compensation device for a solar cell module has an input port, an isolated DC-DC power converter, and an output port. The input port is connected to two output ends of a solar cell array including multiple solar cell modules connected in series. The output port is connected to one of the multiple solar cell modules of the solar cell array. When one of the solar cell modules connected to the output port of shadowing compensation device has been shaded, the isolated DC-DC power converter outputs a compensating current to the solar cell module that has been shaded for increasing the output voltage of the solar cell module that has been shaded, and increasing the output voltage and output power of the solar cell array.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: October 4, 2016
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Ya-Tsung Feng, Jia-Min Shen, Wen-Jie Hou
  • Publication number: 20150122312
    Abstract: A shadowing compensation device for solar cell module has an input port, an isolated DC-DC power converter, and an output port. The input port is connected to two output ends of a solar cell array comprised of multiple solar cell modules connected in series. The output port is connected to one of the multiple solar cell modules of the solar cell array. When one of the solar cell modules connected to the output port of shadowing compensation device has been shaded, the isolated DC-DC power converter outputs a compensating current to the solar cell module been shaded for increasing the output voltage of the solar cell module been shaded, and increasing the output voltage and output power of the solar cell array.
    Type: Application
    Filed: November 6, 2013
    Publication date: May 7, 2015
    Applicant: ABLEREX ELECTRONICS CO., LTD.
    Inventors: Ya-Tsung Feng, Jia-Min Shen, Wen-Jie Hou
  • Patent number: 8130524
    Abstract: A bi-directional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two inductors, two capacitors respectively connected to the two switches, and a third switch connected between the two inductors. The first, second and third switches are respectively connected reversely with a diode in parallel. When the third switch is alternately turned on and off and the first and second switches are always turned off, the power converter operates as a boost power converter and electric energy flows from the two DC sources to the two capacitors. When the third switch is always turned off and the first and second switches are synchronously turned on or off, the power converter operates as a buck power converter and electric energy flows from the two capacitors to the two DC sources.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: March 6, 2012
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Yi-Hu Lee, Wen Hsu, Chin-Chang Wu, Hung-Liang Chou, Ya-Tsung Feng
  • Patent number: 8111528
    Abstract: A DC to AC inverter has a DC power input port, a buck converter, a buck/boost converter, an output filter and an AC output port. The DC power input port has a positive input terminal and a negative input terminal, both connected to a DC source. The AC output port is connected to a single-phase utility system. When the single-phase utility system is in positive half cycle, the buck converter generates a positive half-cycle signal of sinusoidal current. When the single-phase utility system is in negative half cycle, the buck/boost converter generates a negative half-cycle signal of sinusoidal current. In either the positive or negative half cycles, only one power electronic switch is switched in high frequency to reduce switching loss. Further, the negative input terminal of the DC power input port of the invention can be connected to a neutral line of the single-phase utility system.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: February 7, 2012
    Inventors: Chin-Chang Wu, Chun-Han Chen, Ming-Sheng Kao, Li-Hsiang Lai, Ya-Tsung Feng
  • Patent number: 8072187
    Abstract: A battery-charging device, having a maximum power point tracking (MPPT) function, for a stand-alone generator system includes a DC/DC power converter and a control circuit used to control the DC/DC power converter.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: December 6, 2011
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Kuen-Der Wu, Hung-Yuan Tai, Jie-Tin Lee, Chang-Chu Wu, Ya-Tsung Feng
  • Patent number: 8031497
    Abstract: A three-leg power converter apparatus including first, second and third input/output ports, a three-leg bridge converter, a filter circuit, a decoupling circuit and a controller is presented. The three-leg bridge converter has three single-leg circuits, two DC terminals connecting to two terminals of the first input/output port, and three mid-terminals with each of them being formed by a middle point of one of the three single-leg circuits. The controller connects to the three-leg bridge converter for controlling an input or output current passing through each DC terminal and mid-terminal. The filter circuit connects between two of the mid-terminals and the second input/output port. The decoupling circuit has two terminals connecting to the second input/output port and another terminal connecting to a terminal of the third input/output port, with the third input/output port having another terminal connecting to the other mid-terminal that dose not connect with the filter circuit.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: October 4, 2011
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Yu-Hua Sun, Chin-Chang Wu, Ya-Tsung Feng
  • Patent number: 8009446
    Abstract: A ripple voltage suppression apparatus includes a DC/DC converter and a control circuit. The DC/DC converter has a power electronic switch. The control circuit has a voltage detector detecting a DC output voltage of the DC/DC converter, a ripple voltage suppression circuit receiving the detected DC output voltage to generate an AC control signal for controlling an AC component of a duty ratio of the power electronic switch, an output voltage regulation circuit receiving the detected DC output voltage to generate a DC control signal for controlling an DC component of a duty ratio, an adder adding the AC and DC control signals to form a combined control signal, and a PWM circuit converting the combined control signal into a PWM signal to control the power electronic switch. Only the DC output voltage of the DC/DC converter has to be detected for the control circuit.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: August 30, 2011
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Jia-Min Shen, Chin-Chang Wu, Li-Hsiang Lai, Lung-Chi Yang, Ya-Tsung Feng
  • Patent number: 7843082
    Abstract: An islanding detection apparatus for a distributed generation power system and a detection method therefor operates a power converter to act as a virtual capacitor or inductor at a frequency close to but unequal to that of a utility power system under abnormal condition of the utility power system. When power failure occurs in the utility power system, only the distributed generation power system supplies power to a load so that a load voltage has been changed in at least one of amplitude and frequency which can be immediately detected islanding phenomenon.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: November 30, 2010
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Wen-Jung Chiang, Chin-Chang Wu, Ya-Tsung Feng
  • Publication number: 20100254170
    Abstract: A DC to AC inverter has a DC power input port, a buck converter, a buck/boost converter, an output filter and an AC output port. The DC power input port has a positive input terminal and a negative input terminal, both connected to a DC source. The AC output port is connected to a single-phase utility system. When the single-phase utility system is in positive half cycle, the buck converter generates a positive half-cycle signal of sinusoidal current. When the single-phase utility system is in negative half cycle, the buck/boost converter generates a negative half-cycle signal of sinusoidal current. In either the positive or negative half cycles, only one power electronic switch is switched in high frequency to reduce switching loss. Further, the negative input terminal of the DC power input port of the invention can be connected to a neutral line of the single-phase utility system.
    Type: Application
    Filed: August 27, 2009
    Publication date: October 7, 2010
    Inventors: Chin-Chang Wu, Chun-Han Chen, Ming-Sheng Kao, Li-Hsiang Lai, Ya-Tsung Feng
  • Publication number: 20100201341
    Abstract: A three-leg power converter apparatus including first, second and third input/output ports, a three-leg bridge converter, a filter circuit, a decoupling circuit and a controller is presented. The three-leg bridge converter has three single-leg circuits, two DC terminals connecting to two terminals of the first input/output port, and three mid-terminals with each of them being formed by a middle point of one of the three single-leg circuits. The controller connects to the three-leg bridge converter for controlling an input or output current passing through each DC terminal and mid-terminal. The filter circuit connects between two of the mid-terminals and the second input/output port. The decoupling circuit has two terminals connecting to the second input/output port and another terminal connecting to a terminal of the third input/output port, with the third input/output port having another terminal connecting to the other mid-terminal that dose not connect with the filter circuit.
    Type: Application
    Filed: April 30, 2009
    Publication date: August 12, 2010
    Applicant: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Yu-Hua Sun, Chin-Chang Wu, Ya-Tsung Feng
  • Patent number: 7733670
    Abstract: A bidirectional active power conditioner includes a DC side, a bidirectional DC/DC power converter, a DC/AC inverter and an AC side. The DC side electrically connects with a DC source while the AC side electrically connects with a load and an AC source. The bidirectional DC/DC power converter is controlled via high-frequency pulse width modulation (PWM) switching so as to generate a predetermined DC voltage or DC current while the DC/AC inverter is controlled to convert the predetermined DC voltage or DC current into a predetermined AC voltage or AC current.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: June 8, 2010
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Ya-Tsung Feng, Chin-Chang Wu, Hung-Liang Chou
  • Publication number: 20100123428
    Abstract: A battery-charging device, having a maximum power point tracking (MPPT) function, for a stand-alone generator system includes a DC/DC power converter and a control circuit used to control the DC/DC power converter.
    Type: Application
    Filed: November 19, 2008
    Publication date: May 20, 2010
    Inventors: Kuen-Der Wu, Hung-Yuan Tai, Jie-Tin Lee, Chang-Chu Wu, Ya-Tsung Feng
  • Publication number: 20100085784
    Abstract: A ripple voltage suppression apparatus includes a DC/DC converter and a control circuit. The DC/DC converter has a power electronic switch. The control circuit has a voltage detector detecting a DC output voltage of the DC/DC converter, a ripple voltage suppression circuit receiving the detected DC output voltage to generate an AC control signal for controlling an AC component of a duty ratio of the power electronic switch, an output voltage regulation circuit receiving the detected DC output voltage to generate a DC control signal for controlling an DC component of a duty ratio, an adder adding the AC and DC control signals to form a combined control signal, and a PWM circuit converting the combined control signal into a PWM signal to control the power electronic switch. Only the DC output voltage of the DC/DC converter has to be detected for the control circuit.
    Type: Application
    Filed: February 16, 2009
    Publication date: April 8, 2010
    Inventors: Hung-Liang CHOU, Jia-Min Shen, Chin-Chang Wu, Li-Hsiang Lai, Lung-Chi Yang, Ya-Tsung Feng
  • Publication number: 20100072819
    Abstract: A bidirectional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two inductors, two capacitors respectively connected to the two switches, and a third switch connected between the two inductors. The first, second and third switches are respectively connected reversely with a diode in parallel. When the third switch is alternately turned on and off and the first and second switches are always turned off, the power converter operates as a boost power converter and electric energy flows from the two DC sources to the two capacitors. When the third switch is always turned off and the first and second switches are synchronously turned on or off, the power converter operates as a buck power converter and electric energy flows from the two capacitors to the two DC sources.
    Type: Application
    Filed: July 8, 2009
    Publication date: March 25, 2010
    Applicant: ABLEREX ELECTRONICS CO., LTD
    Inventors: Yi-Hu Lee, Wen Hsu, Chin-Chang Wu, Hung-Liang Chou, Ya-Tsung Feng
  • Patent number: 7570029
    Abstract: An active power conditioner includes a first power electronic switch set, a second power electronic switch set, a third power electronic switch set, an input filter and an output filter. The active power conditioner can supply a stable AC voltage to a load when a voltage variation occurs at an AC power source by controlling either the second power electronic switch set or the third power electronic switch set via high-frequency switching, and the other power electronic switch sets that are not switched in high frequency are controlled to switch in low-frequency switching.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: August 4, 2009
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Chin-Chang Wu, Hung-Liang Chou, Min-Sheng Huang, Han-Sheng Wei, Ya-Tsung Feng
  • Patent number: 7446510
    Abstract: A diagnosis method for SOH of batteries includes the steps of: providing data of discharge voltages and currents of a battery unit; setting an acceptable value of a predetermined period of time and an acceptable range of variation rate of discharge current for the battery unit; calculating variation rates of discharge voltages and currents of the battery unit within the predetermined period of time by using the data of discharge voltages and currents; recording the data of discharge voltages and currents of the batteries and variation rates thereof; comparing the data of discharge voltages of the batteries and the variation rates thereof if the variation rates of discharge current are fallen within the acceptable range of current variation with selected reference data; and converting results of compared data of discharge voltages of the battery unit and the variation rates thereof into a SOH index.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: November 4, 2008
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Yu-Hua Sun, Kuen-Der Wu, Chin-Chang Wu, Ming-Hsun Hsieh, Ya-Tsung Feng
  • Patent number: 7446511
    Abstract: An active power conditioner, connecting with a load and a power source in parallel, includes a DC power capacitor, a power converter, a high-frequency filter and a control circuit. The control circuit detects the voltage of the DC power capacitor and the current of the power source, thereby performing a closed loop control to stabilize the voltage of the DC power capacitor and performing a feed forward control to generate a driving signal for driving the power converter. The power converter actuates the DC power capacitor to supply a current via the high-frequency filter to reduce the reactive and harmonic components of load current. The load is converted to the linear resistance characteristic, observed from the power source side.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: November 4, 2008
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Chin-Chang Wu, Hung-Liang Chou, Wen-Pin Hsu, Yu-Ting Kuo, Ya-Tsung Feng
  • Publication number: 20080253153
    Abstract: An active power conditioner includes a first power electronic switch set, a second power electronic switch set, a third power electronic switch set, an input filter and an output filter. The active power conditioner can supply a stable AC voltage to a load when a voltage variation is occurred at an AC power source by controlling either the second power electronic switch set or the third power electronic switch set via high-frequency switching, and the other power electronic switch sets that are not switched in high frequency are controlled to switch in low-frequency switching.
    Type: Application
    Filed: December 21, 2007
    Publication date: October 16, 2008
    Inventors: Chin-Chang Wu, Hung-Liang Chou, Min-Sheng Huang, Han-Sheng Wei, Ya-Tsung Feng
  • Patent number: 7398336
    Abstract: A switching device for RS-232 serial port and USB serial port is adapted to simultaneously provide a RS-232 serial port and a USB serial port for a micro-processor with a single USART. The switching device can automatically switch to select either of the RS-232 serial port or the USB serial port as a main interface for communicating with other external computer facilities and related peripheries. When one of the serial ports is selected as the main communication interface to communicate with one of external computers, the other one serial port thereof still can transmit signals from the micro-processor to another computer through its transmitting data pin (TXD).
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: July 8, 2008
    Assignee: UIS Abler Electronics Co., Ltd.
    Inventors: Ya-Tsung Feng, Ming-Hung Chueh, Yu-Shan Liu, Yao-Jen Chang
  • Patent number: 7394237
    Abstract: A maximum power point tracking method, applied to a tracking device, employs a DC/DC converter connecting with a solar cell array, and including a controller actuating the DC/DC converter to perform an active resistance characteristic; a maximum power point tracking circuit adjusting the active resistance of the DC/DC converter; monitoring a change of an output power of the solar cell array in determining a direction for adjusting the active resistance of the DC/DC converter; and the maximum power point tracking circuit repeatedly adjusting the active resistance of the DC/DC converter. If the change of the output power of the solar cell array is positive, the active resistance of the DC/DC converter is adjusted in the same direction; but, conversely, if the change of the output power of the solar cell array is negative, the active resistance of the DC/DC converter is adjusted in an opposite direction.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: July 1, 2008
    Assignee: UIS Abler Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Wen-Jung Chiang, Chin-Chang Wu, Ya-Tsung Feng, Li-Hsiang Lai