A filter for three-phase power supply
A three-phase power supply and filter technology, used in harmonic reduction devices and AC networks to reduce harmonics/ripples, etc., can solve problems such as unfavorable development, low electromagnetic interference, and poor waterproofness, and increase electromagnetic interference performance. , The effect of reducing radiation interference and increasing waterproof properties
Active Publication Date: 2015-12-30
STATE GRID CORP OF CHINA +3
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Problems solved by technology
The overall structural layout of this three-phase power filter is not compact, especially the three cables, which are arranged inside the filter of the three-phase power supply, making the filter bulky and not easy to carry; Extending out to form a joint, the usage is large and the cost is high; after the cable is energized, it will generate radiation interference itself, which reduces the electromagnetic interference performance of the filter of the three-phase power supply
In addition, the current power distribution cabinets and other equipment tend to be miniaturized and integrated. The existing three-phase power supply filters are large in size, high in cost, low in electromagnetic interference, and poor in water resistance, which is not conducive to long-term development. Not suitable for a wide range of applications
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[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.
[0023] Such as figure 1 As shown, the present invention provides a filter for a three-phase power supply, comprising: a housing with a first through hole 8 and a second through hole 10 on two sides opposite to each other; two magnetic rings 3 parallel to each other It is arranged inside the casing, and the annular cavity in the middle of the magnetic ring 3 is opposite to the first through hole 8 and the second through hole 10; three connection terminals 6 are located inside the casing, and each connection terminal has a connection with three The connection part where one of the three cables of the phase power supply is connected; three capacitors 5, which are located inside the housing, and each two of the three terminals 6 are connected through one of the capacitors; wherei...
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The invention discloses a three-phase power source filter. The filter comprises a shell, two magnet rings, three wire connection terminals, three capacitors and three cables. Two opposite side surfaces of the shell are provided with a first through hole and a second through hole respectively. The two magnet rings are arranged in the shell in parallel, an annular cavity in the middle portion of each magnet ring is opposite to the first through hole and the second through hole, and an accommodating space for accommodating the three cables of the three-phase power source is formed by the first through hole, the second through hole and the annular cavities of the two magnet ring collectively. The three wire connection terminals are located in the shell, wherein each wire connection terminal is provided with a connection portion for being connected with one of the three cables of the three-phase power source. The three capacitors are located in the shell, wherein every two wire connection terminals of the three wire connection terminals are connected through one of the capacitors, and ends of the three capacitors are gathered and then grounded through a fourth capacitor. The three cables pass through the accommodating space detachably. According to the invention, the three-phase power source filter has advantages of small size, low cost, good electromagnetic interference prevention performance and good reliability.
Description
technical field [0001] The invention relates to the fields of electromagnetic interference and electromagnetic compatibility, in particular to a filter for a three-phase power supply. Background technique [0002] Filters for three-phase power supplies are widely used in aviation, aerospace and other fields, and are equipment that meet electromagnetic compatibility and prevent electromagnetic interference in equipment such as power distribution cabinets. The structure of the existing three-phase power filter is mainly a housing; components such as magnetic rings and capacitors that constitute the filter are arranged in the housing; three cables that pass through the annular cavity of the magnetic ring, and every two A grounded capacitor is connected between the two cables, which extend from the housing to form the connectors of the filter. The overall structural layout of this three-phase power filter is not compact, especially the three cables, which are arranged inside th...
Claims
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IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 张怡
Owner STATE GRID CORP OF CHINA