Patents by Inventor Kouji Joutaki

Kouji Joutaki 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 apparatus
    Patent number: 9184669
    Abstract: Provided is a technique of detecting not only a main DC voltage but also an auxiliary DC voltage to protect a main rectifier circuit and an auxiliary rectifier circuit. A main power supply circuit drives a load. A main rectifier circuit receives an AC voltage through a first switch to supply the main power supply circuit with a main DC voltage. The first switch is turned off when an overcurrent flows through the main power supply circuit or the load is an overload for the main power supply circuit. A control circuit is supplied with operating power from an auxiliary power supply circuit. An auxiliary rectifier circuit receives the AC voltage while bypassing the first switch to supply the auxiliary power supply circuit with an auxiliary DC voltage. A DC voltage detection circuit detects the main DC voltage and the auxiliary DC voltage.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: November 10, 2015
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasuyuki Tsutsui, Mitsuru Imoto, Norio Sakae, Kouji Joutaki, Keisuke Fukada, Tetsuo Shouji
  • POWER SUPPLY APPARATUS
    Publication number: 20150188445
    Abstract: Provided is a technique of detecting not only a main DC voltage but also an auxiliary DC voltage to protect a main rectifier circuit and an auxiliary rectifier circuit. A main power supply circuit drives a load. A main rectifier circuit receives an AC voltage through a first switch to supply the main power supply circuit with a main DC voltage. The first switch is turned off when an overcurrent flows through the main power supply circuit or the load is an overload for the main power supply circuit. A control circuit is supplied with operating power from an auxiliary power supply circuit. An auxiliary rectifier circuit receives the AC voltage while bypassing the first switch to supply the auxiliary power supply circuit with an auxiliary DC voltage. A DC voltage detection circuit detects the main DC voltage and the auxiliary DC voltage.
    Type: Application
    Filed: May 16, 2013
    Publication date: July 2, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yasuyuki Tsutsui, Mitsuru Imoto, Norio Sakae, Kouji Joutaki, Keisuke Fukada, Tetsuo Shouji