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公开(公告)号：US20190140563A1
公开(公告)日：2019-05-09
申请号：US16238049
申请日：2019-01-02
申请人： ABB Schweiz AG
发明人： Andrey Kalygin , Christian Stulz , Christof Gutscher , Marc Rauer , Mate Jelavic
摘要： A method for starting an induction machine without residual flux includes: scanning a state of the induction machine with different stator frequencies by controlling a supply voltage applied to the induction machine; determining whether a slip value, being a difference between a rotor frequency and a stator frequency, is within a slip interval; and, when it has been determined that the slip value is in the slip interval, regulating the slip value towards zero and magnetising the machine to the required level.
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2.发明申请公开(公告)号：US20200350847A1
公开(公告)日：2020-11-05
申请号：US16927143
申请日：2020-07-13
申请人： ABB Schweiz AG
摘要： A method for controlling a three-phase electrical converter including: selecting a three-phase optimized pulse pattern from a table of pre-computed optimized pulse patterns based on a reference flux; determining a two-component optimal flux from the optimized pulse pattern and determine a one-component optimal third variable; determining a two-component flux error from a difference of the optimal flux and an estimated flux estimated based on measurements in the electrical converter; determining a one-component third variable error from a difference of the optimal third variable and an estimated third variable; modifying the optimized pulse pattern by time-shifting switching instants of the optimized pulse pattern such that a cost function depending on the time-shifts is minimized, wherein the cost function aincludes a flux error term and a third variable error term, wherein the flux error term is based on a difference of the flux error and a flux correction function providing a flux correction based on the time-shifts and the third variable error term is based on a difference of the third variable error and a third variable correction function providing a third variable correction based on the time-shifts; and applying the modified optimized pulse pattern to the electrical converter.
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公开(公告)号：US10819255B2
公开(公告)日：2020-10-27
申请号：US16238049
申请日：2019-01-02
申请人： ABB Schweiz AG
发明人： Andrey Kalygin , Christian Stulz , Christof Gutscher , Marc Rauer , Mate Jelavic
摘要： A method for starting an induction machine without residual flux includes: scanning a state of the induction machine with different stator frequencies by controlling a supply voltage applied to the induction machine; determining whether a slip value, being a difference between a rotor frequency and a stator frequency, is within a slip interval; and, when it has been determined that the slip value is in the slip interval, regulating the slip value towards zero and magnetising the machine to the required level.
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