Transformer resistant to common code interference
A common mode interference and transformer technology, applied in the direction of transformer/inductor coil/winding/connection, preventing/reducing unnecessary electric/magnetic influence, etc., can solve low-frequency noise, leakage current and other problems, and achieve reduction Common mode interference, reduction of interlayer capacitance, and effect of reducing common mode interference
Inactive Publication Date: 2013-12-25
湖南崧顺科技有限公司
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Problems solved by technology
In order to solve this problem, the Y capacitor is generally connected across the primary winding and the secondary winding of the transformer, so that the common-mode interference noise forms a loop through the Y capacitor, effectively reducing the amplitude of the common-mode interference noise, but it will generate leakage current and form low frequency noise
Method used
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[0028] Below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described:
[0029] See Figure 1 to Figure 3 , The present invention relates to a transformer with anti-common mode interference, and its preferred embodiment includes a magnetic core, a winding base 40 , a primary winding 10 , a main shielding winding 20 , a secondary winding 30 and an auxiliary shielding winding 50 .
[0030] The primary winding 10 , the main shielding winding 20 , the secondary winding 30 and the auxiliary shielding winding 50 are sleeved outside the winding base 40 from inside to outside in sequence.
[0031] The primary winding 10 includes a first sub-winding and a second sub-winding, the starting end and the receiving end of the first sub-winding are respectively set on the second pin PIN2 and the third pin PIN3 of the winding base 40, the first sub-winding The starting end and the receiving end of the second sub-winding are respectively...
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A transformer resistant to common code interference comprises a wing seat, a primary winding, a main shielding winding, a secondary winding and an auxiliary shielding winding, the primary winding, the main shielding winding, the secondary winding and the auxiliary shielding winding are sleeved outside the winding seat sequentially from the inside out. The primary winding comprises a first sub-winding and a second sub-winding, an initial end and an winding-up end of the first sub-winding are arranged on a first pin and a second pin of the winding seat respectively, an initial end and an winding-up end of the second sub-winding are arranged on a third pin and a fifth pin of the winding seat respectively, and the first sub-winding and the second sub-winding are wound in parallel to form the primary winding. The transformer is capable of guaranteeing excellent EMI (electro-magnetic interference) effect and reducing common code interference.
Description
[0001] technical field [0002] The invention relates to an anti-common mode interference transformer. [0003] Background technique [0004] Most of the common-mode interference signals of the switching power supply come from the transformer. The primary high-frequency noise inside the transformer is coupled to the secondary winding through the parasitic capacitance (that is, the interlayer capacitance between the transformer windings), and then through the connection between the secondary winding and the ground. The parasitic capacitance is coupled to the RF receiver or to the conduction receiver through the input and output wires. In order to solve this problem, the Y capacitor is generally connected across the primary winding and the secondary winding of the transformer, so that the common-mode interference noise forms a loop through the Y capacitor, effectively reducing the amplitude of the common-mode interference noise, but it will generate leakage current and form ...
Claims
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Login to View More IPC IPC(8): H01F27/28H01F27/30H01F27/36
Inventor 廖邦勇范继光
Owner 湖南崧顺科技有限公司