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公开(公告)号：US1894098A
公开(公告)日：1933-01-10
申请号：US28437228
申请日：1928-06-11
申请人： GEN ELECTRIC
发明人： LEOPOLD JANISCH
IPC分类号： H02P1/02
CPC分类号： H02P1/02 , Y10T137/86919
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公开(公告)号：US1839938A
公开(公告)日：1932-01-05
申请号：US17625127
申请日：1927-03-17
申请人： ALLEN BRADLEY CO
发明人： WILMS GUSTAV O
IPC分类号： H02P1/02
CPC分类号： H02P1/02
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公开(公告)号：US1718957A
公开(公告)日：1929-07-02
申请号：US60326522
申请日：1922-11-25
发明人： HILLIX FOSTER F
IPC分类号： H02P1/02
CPC分类号： H02P1/02
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公开(公告)号：US1352249A
公开(公告)日：1920-09-07
申请号：US25990218
申请日：1918-10-28
申请人： GEN ELECTRIC
发明人： CROCKER ARTHUR T
IPC分类号： H02P1/02
CPC分类号： H02P1/02
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公开(公告)号：US1352247A
公开(公告)日：1920-09-07
申请号：US25514218
申请日：1918-09-21
申请人： GEN ELECTRIC
发明人： CASE FRANK E
IPC分类号： H02P1/02
CPC分类号： H02P1/02
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公开(公告)号：US807938A
公开(公告)日：1905-12-19
申请号：US1905253636
申请日：1905-04-03
发明人： JAMES HENRY D
CPC分类号： H02P1/02
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公开(公告)号：US661196A
公开(公告)日：1900-11-06
申请号：US1899731945
申请日：1899-09-28
发明人： SCOTT WILLIAM M
CPC分类号： H02P1/02
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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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公开(公告)号：US20190121311A1
公开(公告)日：2019-04-25
申请号：US15790562
申请日：2017-10-23
CPC分类号： G05B19/05 , G05B2219/25368 , G06F1/206 , G06F3/0625 , G06F3/0634 , G06F3/065 , G06F3/0679 , H02H3/006 , H02H6/005 , H02P1/02 , H02P1/029
摘要： The overload relay units within a motor control group have the timing function for their motor thermal memories under the control of a central controller in communication with the overload relays. Thus expensive timing components and control of timestamps can be removed from individual overload relays. Further reduction of individual overload relay components can be accomplished by removing the nonvolatile memory function from the individual overload relays and allowing the central controller to perform the nonvolatile memory functions for the overload relays. The motor thermal model function for the overload relays can remain in the overload relays or might be moved to the central controller if communication bandwidth permits.
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