| 摘要 |
The invention relates to a drive system for internal recirculation of coolant in a nuclear reactor, wherein the drive system for a main recirculation pump (10) for the coolant recirculation comprises a pump motor (11) connected to the main recirculation pump (10) and a static frequency converter (F) for connection to an alternating voltage network (16) and for feeding the pump motor (11). The frequency converter (F) comprises a rectifier (12) for connection between the alternating voltage network (16) and a d.c. intermediate link (15) and a first inverter (13) for connection between the d.c. intermediate link (15) and the pump motor (11). The invention is characterized in that the energy storage magazine, for exemple a flywheel (18), is connected to the d.c. intermediate link (15) via a second inverter (14). The invention is further characterized in that the second inverter (14) is adapted, in the event of loss of voltage from the alternating voltage network (16), to feed back energy from the energy storage magazine (18) to the d.c. intermediate link (15) for controlled direct or delayed reduction via the first inverter (13) of the speed of the main recirculation pump (10).
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