Invention Grant
US08461793B2 Motor load control apparatus 有权
电机负载控制装置

  • Patent Title: Motor load control apparatus
  • Patent Title (中): 电机负载控制装置
  • Application No.: US12918577
    Application Date: 2009-02-20
  • Publication No.: US08461793B2
    Publication Date: 2013-06-11
  • Inventor: Shunzou Ohshima
  • Applicant: Shunzou Ohshima
  • Applicant Address: JP Tokyo
  • Assignee: Yazaki Corporation
  • Current Assignee: Yazaki Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Sughrue Mion, PLLC
  • Priority: JP2008-039080 20080220
  • International Application: PCT/JP2009/052965 WO 20090220
  • International Announcement: WO2009/104713 WO 20090827
  • Main IPC: H02P1/30
  • IPC: H02P1/30 H02P3/00
Motor load control apparatus
Abstract:
A motor load control apparatus capable of suppressing heat generation of an electronic switch and suppressing occurrence of noise associated with rotation of a fan and vibration of the fan is provided. A switch section (17) in which a first electronic switch (T1) and a second electronic switch (T2) are connected in parallel is provided, and the first electronic switch (T1) is driven by a PWM signal with a predetermined duty ratio and a predetermined frequency and the second electronic switch (T2) is driven in a state of delaying the PWM signal by which the first electronic switch (T1) is driven by a predetermined time. Consequently, as compared with the case of one electronic switch, a heating value of each of the electronic switches can be reduced and radiation measures of the whole apparatus can be reduced. Further, noise or vibration occurring by PWM control can be reduced by changing delay time at random.
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