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METHOD FOR A NETWORK SYNCHRONIZATION OF A PERMANENTLY EXCITED THREE-PHASE MACHINE COMPRISING A SOFT STARTER WHICH COMPRISES THYRISTORS
METHOD FOR A NETWORK SYNCHRONIZATION OF A PERMANENTLY EXCITED THREE-PHASE MACHINE COMPRISING A SOFT STARTER WHICH COMPRISES THYRISTORS
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机译:用于网络同步的方法,包括软启动器,包括晶闸管
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摘要
A method is for a network synchronization of a permanently excited three-phase machine including a soft starter, including thyristors, and mechanical bypass contacts for bridging the thyristors in the network operation. The method includes generating a first control signal, to initiate switching the mechanical bypass contacts to become conductive, after a criterion is reached while running up the three-phase machine on the soft starter, a time at which the first control signal is generated representing actuation time of the bypass contacts; generating ignition pulses for the thyristors within a time period, running from the actuation time to a contact time of the bypass contacts, using a second control signal; and operating the three-phase machine in the network operation via the bypass contacts. Each ignition pulse for a thyristor is generated when a phase current measurement indicates that the current strength in the assigned phase has fallen below a threshold value.
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