Integrated chip type current sensor and manufacturing method thereof

Abstract

The invention discloses an integrated chip type current sensor and a manufacturing method thereof, and relates to the technical field of current sensors. The integrated chip type current sensor comprises a metal plate lead frame conductor device and an iron core; the metal plate lead frame conductor device is bonded with a magnetic induction probe and is provided with a plastic package body wrapping the magnetic induction probe; the iron core is U-shaped and is provided with a U-shaped groove, and the plastic package body is inserted into the U-shaped groove of the iron core; and the outer side of the plastic package body is provided with a shell wrapping the iron core. The Hall ASIC chip, the iron core and the busbar are subjected to integrated injection molding, so that the weight size of the sensor is greatly reduced, and the vibration resistance and the thermal shock resistance are effectively improved; and meanwhile, the lead frame for assembling the Hall ASIC chip and the busbarare integrally arranged, the distance is accurate, the purpose of improving the isolation voltage of the primary side and the secondary side is achieved, and the effects of simplifying the design difficulty, being easy to machine, being suitable for automatic production and improving the batch manufacturing process level are achieved.

Description

technical field [0001] The present application relates to the technical field of current sensors, in particular to an integrated chip current sensor and a manufacturing method thereof. Background technique [0002] In the power system field, especially in the high-voltage direct current transmission system, the grid structure of the mixed operation of AC and DC will cause great interference to the power grid and directly affect the quality of power transmission. If the ground DC is not processed and isolated, it will form DC bias, DC bias will have a serious impact on the transformer. Therefore, it is necessary to filter out the DC component in the AC-DC hybrid situation, and the current sensor used to detect the DC component in the AC current situation is used as a DC detection device to detect each group of transformer systems. [0003] The Chinese patent with the notification number CN201285410Y discloses a current sensor. The current sensor includes a housing, an iron c...

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Problems solved by technology

[0004] However, each part of the current sensor needs to be processed separately, and it is difficult to meet the high-precision requirements during installation, which will affect the performance of the current sensor and the cost of manufacturing and use, and needs to be improved

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