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公开(公告)号:US5311418A
公开(公告)日:1994-05-10
申请号:US849069
申请日:1992-04-22
Applicant: Magnus Lalander
Inventor: Magnus Lalander
CPC classification number: H02M7/7575 , H02M3/315 , Y02E60/60 , Y10T307/707
Abstract: A DC/DC power transformer is provided which is an arrangement for direct transformation of high electric power from one DC voltage level to another DC voltage level without an intermediate AC voltage network. The DC voltage is today basically used for transmission of high electric power at long distances. The DC voltage levels for these transmissions are normally high. The DC/DC power transformer allows several DC voltage levels to be used in one and the same DC voltage network. The principle for this arrangement is that the valve windings (43, 45) from one or several converter transformers (47) are connected to two valve bridges, which generate opposing cyclically variating magnetic flows in the transformer cores (44). One of the valve bridges is operated as an inverter (42) and the other as a rectifier (46) and in this manner the power is transformed from one DC voltage level (U.sub.d1) to another (U.sub.d2). At high voltage levels the leakage inductances in the transformers will be high as a consequence of the insulation levels and therefore special arrangements must be made in order to commutate the magnetic energy from one phase of the transformer to another without creating great losses.
Abstract translation: PCT No.PCT / SE90 / 00710 Sec。 371日期:1992年4月22日 102(e)日期1992年4月22日PCT 1990年11月2日PCT PCT。 公开号WO91 / 07807 日期:1991年5月30日。提供了一种DC / DC电力变压器,其是用于将高电力从一个直流电压电平直接转换到另一个直流电压电平而不使用中间交流电压网络的装置。 直流电压今天基本上用于长距离传输高功率电力。 这些传输的直流电压电平通常很高。 DC / DC电源变压器允许在同一直流电压网络中使用多个直流电压电平。 这种布置的原理是来自一个或多个转换变压器(47)的阀门绕组(43,45)连接到两个阀桥,这两个阀桥在变压器铁芯(44)中产生相反的周期性变化的磁流。 其中一个阀桥作为逆变器(42),另一个作为整流器(46)运行,以这种方式,功率从一个直流电压电平(Ud1)变换到另一个(Ud2)。 在高电压电平下,由于绝缘水平,变压器中的漏电感将很高,因此必须进行特殊的布置,以便将磁能从变压器的一相转换到另一相,而不会产生很大的损耗。