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1.发明授权Static converter with dc intermediate circuit for controlling the speed of a three phase motor 失效具有直流中间电路的静态转换器，用于控制三相电机的转速
公开(公告)号：US3612971A
公开(公告)日：1971-10-12
申请号：US3612971D
申请日：1969-08-27
Applicant: SIEMENS AG
Inventor： BLASCHKE FELIX , RIPPERGER HERBERT
CPC classification number: H02P27/06 , H02P23/0004 , H02P27/047 , H02P2201/03
Abstract: A first controllable converter is connected to an electrical power supply source. A second controllable converter is connected to a three-phase electric motor having stator windings impressed by preenergizing current. At least one smoothing choke for controlling the speed of the motor is connected at one end to the first converter and at the other end to the second converter. A control circuit causes the voltage at the one end of the choke to follow the voltage at the other end of the choke.
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