Invention Grant
- Patent Title: Method and apparatus for current measurement in an electrical network, in particular a multiphase electrical network
- Patent Title (中): 电网中的电流测量方法和装置,特别是多相电网
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Application No.: US12514035Application Date: 2007-09-20
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Publication No.: US08421394B2Publication Date: 2013-04-16
- Inventor: Gilles Schmitt , Sven Finke , Jochen Kurfiss
- Applicant: Gilles Schmitt , Sven Finke , Jochen Kurfiss
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Maginot, Moore & Beck
- Priority: DE102006052467 20061107
- International Application: PCT/EP2007/059984 WO 20070920
- International Announcement: WO2008/055741 WO 20080515
- Main IPC: G05B11/28
- IPC: G05B11/28

Abstract:
The invention relates to a method for current measurement in an in particular multiphase electrical system, in which an electrical load is energized as desired by at least one circuit element and a control unit produces drive signals which act on the at least one circuit element in order to achieve the desired energization of the load. The invention provides that clock patterns of the drive signals are associated with measurement windows for current measurement, in particular for measuring phase currents, and clock patterns are temporally offset in order to obtain measurement windows with a sufficient temporal length. A minimum temporal shift is the sum of a minimum dead time of the circuit element, a minimum settling time of the measuring amplifier circuit, and a minimum sampling time of the analogue-to-digital converter. The invention furthermore provides that the clock patterns are selected taking into consideration a phase selection for the current measurement. Provision may be made for the clock patterns to be selected taking into consideration the instantaneous rotary angle position of the phase vector. In addition, a corresponding apparatus is specified.
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