Invention Grant
- 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
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Application No.: US14647753Application Date: 2013-09-27
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Publication No.: US09590544B2Publication Date: 2017-03-07
- Inventor: Andreas Schmidtlein , Gotthilf Koerner , Marco Ferwagner , Christoph 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

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.
Public/Granted literature
- US20150303849A1 METHOD FOR OPERATING AN ELECTRIC MOTOR AND CORRESPONDING ELECTRIC MOTOR DEVICE Public/Granted day:2015-10-22
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