Three-phase composite LC filter
An LC filter, three-phase technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of non-compact structure, large distribution surface, high integration, and achieve compact structure, simple use and high integration. Effect
Inactive Publication Date: 2020-04-17
HUNAN UNIV OF TECH
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Problems solved by technology
[0002] Conventional three-phase LC filters are simple in structure and cheap, and are widely used in the field of three-phase AC power supplies; however, conventional three-phase LC filters are mainly differential-mode interference filters composed of inductors and capacitors. If common-mode interference needs to be suppressed , you need to add additional settings, and will use multi-level cascade connection, not only the overall distribution area is large, but also the structure is not compact
Therefore, the current market lacks a three-phase composite LC filter that can suppress both differential mode and common mode and has a high degree of integration.
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[0014] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical composition, technical solutions and embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0015] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.
[0016] as attached figure 1 As shown, it is a typical schematic diagram of the three-phase composite LC filter of the present invention; it includes A-phase LC filter,...
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The invention discloses a three-phase composite LC filter, which is applied to the field of A-phase, B-phase and C-phase alternating current power supplies. The three-phase composite LC filter comprises an A-phase LC filter, a B-phase LC filter and a C-phase LC filter, wherein each phase LC filter is formed by connecting four stages of LC filter circuits in series; the A-phase LC filter comprisesan A-phase input port Ain and an A-phase output port Aout; the B-phase LC filter comprises a B-phase input port Bin and a B-phase output port Bout; and the C-phase LC filter comprises a C-phase inputport Cin and a C-phase output port Cout. The three-phase composite LC filter provided by the invention not only is simple to use, compact in structure, high in integration level and strong in universality, but also can suppress differential mode interference and common mode interference.
Description
technical field [0001] The present invention relates to a three-phase filter, more particularly, to a three-phase composite LC filter. Background technique [0002] The conventional three-phase LC filter is simple in structure and cheap, and is widely used in the field of three-phase AC power; however, the conventional three-phase LC filter is mainly a differential mode interference filter composed of inductors and capacitors. If it is necessary to suppress common mode interference , it is necessary to add additional settings, and will use multi-level cascade connection, not only the overall distribution area is large, but also the structure is not compact. Therefore, there is currently a lack of a three-phase composite LC filter that can suppress both differential mode and common mode and has a high degree of integration. SUMMARY OF THE INVENTION [0003] In view of this, the present invention aims to provide a three-phase composite LC filter, which overcomes the defects...
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IPC IPC(8): H02M1/12
CPCH02M1/12H02M1/123
Inventor 肖强晖李娟王远洋刘煜鸿刘亚廖无限徐彬鑫
Owner HUNAN UNIV OF TECH