Invention Grant
US3555397A Thyristor current converter with means for rapidly extinguishing the load current
失效
THYRISTOR电流转换器，用于快速消除负载电流
- Patent Title: Thyristor current converter with means for rapidly extinguishing the load current
- Patent Title (中): THYRISTOR电流转换器，用于快速消除负载电流
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Application No.: US3555397DApplication Date: 1969-04-23
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Publication No.: US3555397APublication Date: 1971-01-12
- Inventor: FRANK KJELL
- Applicant: ASEA AB
- Assignee: Asea Ab
- Current Assignee: Asea Ab
- Priority: SE576468 1968-04-29
- Main IPC: H01J13/48
- IPC: H01J13/48 ; H02M1/06 ; H02M7/515 ; H02M7/525 ; H02P27/06 ; H02M7/00 ; H02M7/52
Abstract:
IN A THYRISTOR CURRENT CONVERTER HAVING A CONTROL PULSE DEVICE FOR DELIVERING CONTROL PULSES TO THE MAIN THYRISTORS, AND AT LEAST ONE EXTINGUISHING CIRCUIT FOR EXTINGUISHING EACH THYRISTOR AT THE END OF ITS CONDUCTING INTERVAL, AND HAVING AN OSCILLATOR FOR CONTROLLING THE OPERATING RATE OF THE CONTROL PULSE DEVICE AND THE EXTINGUISHING CIRCUIT, THE LOAD CURRENT IS RAPIDLY EXTINGUISHED BY AN ARRANGEMENT WHICH FIRST BLOCKS THE CONTROL PULSES TO THE MAIN
THYRISTORS AND SECOND REGULATES THE CONTROL SIGNAL APPLIED TO THE OSCILLATOR SO THAT THE OSCILLATOR FREQUENCY IS HIGHER DURING THE BLOCKING INTERVAL THAN IMMEDIATELY PRIOR THERETO. THE BLOCKING INTERVAL IS SUFFICIENT TO PERMIT THE EXTINGUISHING CIRCUIT TO EXTINGUISH ALL OF THE THYRISTORS.
THYRISTORS AND SECOND REGULATES THE CONTROL SIGNAL APPLIED TO THE OSCILLATOR SO THAT THE OSCILLATOR FREQUENCY IS HIGHER DURING THE BLOCKING INTERVAL THAN IMMEDIATELY PRIOR THERETO. THE BLOCKING INTERVAL IS SUFFICIENT TO PERMIT THE EXTINGUISHING CIRCUIT TO EXTINGUISH ALL OF THE THYRISTORS.
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