Invention Grant
US09590544B2 Method for operating an electric motor and corresponding electric motor device 有权
操作电动机及相应电动机装置的方法

  • Patent Title: Method for operating an electric motor and corresponding electric motor device
  • Patent Title (中): 操作电动机及相应电动机装置的方法
  • Application No.: US14647753
    Application Date: 2013-09-27
  • Publication No.: US09590544B2
    Publication Date: 2017-03-07
  • Inventor: Andreas SchmidtleinGotthilf KoernerMarco FerwagnerChristoph Emde
  • Applicant: Robert Bosch GmbH
  • Applicant Address: DE Stuttgart
  • Assignee: ROBERT BOSCH GMBH
  • Current Assignee: ROBERT BOSCH GMBH
  • Current Assignee Address: DE Stuttgart
  • Agent Gerard Messina
  • Priority: DE102012221662 20121127
  • International Application: PCT/EP2013/070212 WO 20130927
  • International Announcement: WO2014/082772 WO 20140605
  • Main IPC: H02P6/14
  • IPC: H02P6/14 H02P7/29
Method for operating an electric motor and corresponding electric motor device
Abstract:
A method for operating an electric motor connectable via a switching device to a current source and connected in parallel with a freewheeling device, the switching device having control applied to it at a specific activation ratio within each working cycle to establish a desired effective operating voltage of the electric motor, so that in at least one operating mode each working cycle is includes an activation and a freewheeling time period. The freewheeling device has a freewheeling transistor and a freewheeling diode, connected in parallel with the transistor and reverse-biased as to the current source; and control is applied to the freewheeling transistor in the freewheeling time period as follows: identifying the freewheeling voltage dropping across the electric motor; and switching the freewheeling transistor for a specific switching time period if the freewheeling voltage is different from zero, particularly less than zero. Also described is an electric motor device.
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