Patents by Inventor Junshan Lou

Junshan Lou 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).

  • Power supply with low standby loss
    Publication number: 20070115695
    Abstract: The present invention discloses a power supply device with low standby loss. The power supply device comprises a main power converter and an auxiliary power converter. The main power converter comprises a bulk capacitor. The main power converter connects parallelly with the auxiliary power converter. When the power supply device is in a standby mode, the main converter is turned off and the auxiliary converter provides the output to the outputting load and the bulk capacitor. Moreover, when the power supply device is in a normal mode, the main converter and the auxiliary converter together provide the output to an outputting load. Under a normal mode, the main converter provides most of the power and the auxiliary converter operates in a power-limited finite value such that the topology of the power supply device achieves a low standby loss.
    Type: Application
    Filed: December 29, 2005
    Publication date: May 24, 2007
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Junshan Lou, Jiangtao Feng, Hongjian Gan
  • Energy efficient power supply device and operating method thereof
    Patent number: 7173833
    Abstract: A power supply device and an operating method thereof are provided. The power supply device includes a main converter and an auxiliary converter. The main converter includes a power factor corrector (PFC), a first capacitor that connects in parallel with the PFC and a DC/DC converter that connects in parallel with the first capacitor. The auxiliary converter is connected in parallel to the main converter. When the power supply device operates in a normal mode, the main converter and the auxiliary converter together provide a first output to an output load. When the power supply device is in a standby mode, the DC/DC converter is turned off so that only the auxiliary converter provides a second output to the output load. Meanwhile, the PFC is in operation to maintain the voltage of the first capacitor in order to meet the demand of the output dynamic response of the main converter.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: February 6, 2007
    Assignee: Delta Electronics, Inc.
    Inventors: Kun-Chi Lin, Youjun Zhang, Qinggang Kong, Junshan Lou, Hongjian Gan
  • ENERGY EFFICIENT POWER SUPPLY DEVICE AND OPERATING METHOD THEREOF
    Publication number: 20060120120
    Abstract: A power supply device and an operating method thereof are provided. The power supply device includes a main converter and an auxiliary converter. The main converter comprises a power factor corrector (PFC), a first capacitor that connects in parallel with the PFC and a DC/DC converter that connects in parallel with the first capacitor. The auxiliary converter is connected in parallel to the main converter. When the power supply device operates in a normal mode, the main converter and the auxiliary converter together provide a first output to an output load. When the power supply device is in a standby mode, the DC/DC converter is turned off so that only the auxiliary converter provides a second output to the output load. Meanwhile, the PFC is in operation to maintain the voltage of the first capacitor in order to meet the demand of the output dynamic response of the main converter.
    Type: Application
    Filed: April 29, 2005
    Publication date: June 8, 2006
    Inventors: Kun-Chi Lin, Youjun Zhang, Qinggang Kong, Junshan Lou, Hongjian Gan