Invention Grant
- Patent Title: Control device for an asynchronous machine and method for operating an asynchronous machine
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Application No.: US15551652Application Date: 2016-01-13
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Publication No.: US10432126B2Publication Date: 2019-10-01
- Inventor: Martin Hennen
- Applicant: Robert Bosch GmbH
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Michael Best & Friedrich LLP
- Priority: DE102015203524 20150227
- International Application: PCT/EP2016/050502 WO 20160113
- International Announcement: WO2016/134872 WO 20160901
- Main IPC: G01H3/00
- IPC: G01H3/00 ; H02P6/10 ; H02P23/08 ; H02P1/00 ; H02P27/06

Abstract:
The invention relates to a method for operating an asynchronous machine comprising the steps: determining an operating point trajectory for the asynchronous machine for a plurality of desired torques of the asynchronous machine by calculating 2-tuples from longitudinal current values and cross current values in a synchronously rotating coordinate system of the asynchronous machine; calculating a slip frequency of the asynchronous machine for each of the 2-tuples calculated from longitudinal current values and cross current values; determining a current rotor speed of the asynchronous machine; calculating an excitation frequency of the asynchronous machine by summation of the calculated slip frequency and the current rotor speed weighted with the number of pole pairs of the asynchronous machine; and comparing the calculated excitation frequency of the asynchronous machine with at least one predetermined resonance frequency value of the asynchronous machine. The determined operating point trajectory is thereby corrected by changing the ratio between longitudinal current value and cross current value at a constant desired torque for each of the 2-tuples for which the calculated excitation frequency corresponds to the at least one resonance frequency value.
Public/Granted literature
- US20180026564A1 CONTROL DEVICE FOR AN ASYNCHRONOUS MACHINE AND METHOD FOR OPERATING AN ASYNCHRONOUS MACHINE Public/Granted day:2018-01-25
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