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公开(公告)号：SE8705000D0
公开(公告)日：1987-12-15
申请号：SE8705000
申请日：1987-12-15
Applicant: ASEA AB
Inventor： ERIKSSON R , HAMMARLUND G , SUNDQVIST L-E
IPC: G01R31/327 , H01R29/00 , G01R31/00
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公开(公告)号：SE7607485L
公开(公告)日：1977-12-31
申请号：SE7607485
申请日：1976-06-30
Applicant: ASEA AB
Inventor： HAMMARLUND G
Abstract: The circuitry for generating filter excitation signals from a multi-phase alternating current input is provided with the following circuitry for each phase of the multi-phase alternating current input. A current transformer connected to a respective phase of the multiphase alternating current input is connected to a bridge rectifier having one node connected to a neutral conductor and including a resistor of equal resistance value connected in each parallel branch of the bridge rectifier between the neutral conductor and the input of the current transformer. An operational amplifier having inputs respectively responsive to the voltage across each of the respective resistors in the bridge rectifier generates an output for one phase of the excitation signal to the filter. The filter excitation circuitry has application to two-phase and three-phase systems wherein the excitation circuitry is identical for each phase.
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公开(公告)号：DK107276A
公开(公告)日：1976-09-15
申请号：DK107276
申请日：1976-03-12
Applicant: ASEA AB
Inventor： HAMMARLUND G , WESTERBERG L
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公开(公告)号：SE8705000L
公开(公告)日：1989-06-16
申请号：SE8705000
申请日：1987-12-15
Applicant: ASEA AB
Inventor： ERIKSSON R , HAMMARLUND G , SUNDQVIST L-E
IPC: G01R31/327 , H01R29/00
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Patent Agency Ranking
公开(公告)号：YU158477A
公开(公告)日：1982-05-31
申请号：YU158477
申请日：1977-06-27
Applicant: ASEA AB
Inventor： HAMMARLUND G
Abstract: The circuitry for generating filter excitation signals from a multi-phase alternating current input is provided with the following circuitry for each phase of the multi-phase alternating current input. A current transformer connected to a respective phase of the multiphase alternating current input is connected to a bridge rectifier having one node connected to a neutral conductor and including a resistor of equal resistance value connected in each parallel branch of the bridge rectifier between the neutral conductor and the input of the current transformer. An operational amplifier having inputs respectively responsive to the voltage across each of the respective resistors in the bridge rectifier generates an output for one phase of the excitation signal to the filter. The filter excitation circuitry has application to two-phase and three-phase systems wherein the excitation circuitry is identical for each phase.
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公开(公告)号：SE399995B
公开(公告)日：1978-03-06
申请号：SE7607485
申请日：1976-06-30
Applicant: ASEA AB
Inventor： HAMMARLUND G
Abstract: The circuitry for generating filter excitation signals from a multi-phase alternating current input is provided with the following circuitry for each phase of the multi-phase alternating current input. A current transformer connected to a respective phase of the multiphase alternating current input is connected to a bridge rectifier having one node connected to a neutral conductor and including a resistor of equal resistance value connected in each parallel branch of the bridge rectifier between the neutral conductor and the input of the current transformer. An operational amplifier having inputs respectively responsive to the voltage across each of the respective resistors in the bridge rectifier generates an output for one phase of the excitation signal to the filter. The filter excitation circuitry has application to two-phase and three-phase systems wherein the excitation circuitry is identical for each phase.
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公开(公告)号：SE7607485A
公开(公告)日：1977-12-31
申请号：SE7607485
申请日：1976-06-30
Applicant: ASEA AB
Inventor： HAMMARLUND G
CPC classification number: G01R29/18 , H02H1/0007 , H02H1/0038
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公开(公告)号：SE7502866L
公开(公告)日：1976-09-15
申请号：SE7502866
申请日：1975-03-14
Applicant: ASEA AB
Inventor： HAMMARLUND G , WESTERBERG L
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