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A Hall current and sensor technology, applied in the field of sensors, can solve the problems of inconvenient installation and poor anti-interference ability.
Inactive Publication Date: 2015-12-23
NINGBO HUAYU ELECTRONICS
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Problems solved by technology
However, the Hall current sensor in the prior art has the problems of poor anti-interference ability and inconvenient installation.
Method used
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Embodiment 1
[0067] The raw materials were weighed according to the composition and parts by weight of the ring mounting part in Example 1 in Table 1. Among them, the fibrous material is carbon fiber, the metal powder is iron powder with a particle size of 150nm, the antistatic agent is fatty acid polyol ester, the toughening agent is nano-calcium carbonate coated with POE-g-MAH, and the flame retardant is phosphorus-g-MAH. The nitrogen flame retardant, the formaldehyde absorber melamine, the formic acid absorber is sodium oxide, and the antioxidant is a commercially available antioxidant.
[0068] During preparation, the annular mounting part is made by injection molding, extrusion, extrusion or blow molding.
Embodiment 2
[0070] The raw materials were weighed according to the composition and parts by weight of the annular mounting part of Example 2 in Table 1. Among them, the fibrous material is carbon fiber, the metal powder is iron powder with a particle size of 150nm, the antistatic agent is fatty acid polyol ester, the toughening agent is nano-calcium carbonate coated with POE-g-MAH, and the flame retardant is phosphorus-g-MAH. The nitrogen flame retardant, the formaldehyde absorber melamine, the formic acid absorber is sodium oxide, and the antioxidant is a commercially available antioxidant.
[0071] During preparation, the annular mounting part is made by injection molding, extrusion, extrusion or blow molding.
Embodiment 3
[0073] The raw materials were weighed according to the composition and parts by weight of the ring mounting part of Example 3 in Table 1. Among them, the fibrous material is carbon fiber, the metal powder is iron powder with a particle size of 150nm, the antistatic agent is fatty acid polyol ester, the toughening agent is nano-calcium carbonate coated with POE-g-MAH, and the flame retardant is phosphorus-g-MAH. The nitrogen flame retardant, the formaldehyde absorber melamine, the formic acid absorber is sodium oxide, and the antioxidant is a commercially available antioxidant.
[0074] During preparation, the annular mounting part is made by injection molding, extrusion, extrusion or blow molding.
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Abstract
Provided in the invention is an open-loop hall current sensor. With the sensor, a problem of weak anti-interference capability of the existing sensor is solved. The open-loop hall current sensor comprises an insulating housing; a mounting part is arranged at the end surface of the insulating housing; and a positioning part is arranged at the side wall of the insulating housing. The middle part of the insulating housing is hollowed to form an accommodation cavity; and an annular mounting part for installing a lead is arranged in the accommodation cavity. An annular magnetic core is arranged between the annular mounting part and the insulating housing; a notch penetrating the annular magnetic core is formed in the annular magnetic core; and the annular magnetic core and the annular mounting part are arranged coaxially. A hall element and a circuit board connected with the hall element are installed in the notch. A connecting hole is formed in the insulating housing; a connecting wire connected with the circuit board is arranged in the connecting hole; and a connecting sleeve is arranged between the connecting wire and the connecting hole. The annular mounting part is made of a polyformaldehyde composite material. The open-loop hall current sensor has advantages of high anti-interference capability and convenient installation.
Description
technical field [0001] The invention belongs to the technical field of sensors and relates to an open-loop Hall current sensor. Background technique [0002] The open-loop Hall current sensor is based on the working principle of the Hall direct-amplification, that is, when the primary current IP flows through a long wire, a magnetic field will be generated around the wire, and the magnitude of this magnetic field is related to the current flowing through the wire. In direct proportion, the generated magnetic field gathers in the magnetic ring, and is measured and amplified by the Hall device in the air gap of the magnetic ring. The output voltage Vs accurately reflects the primary current Ip and is processed by a special circuit for the primary current. Changing detection components, Hall current sensors are widely used in frequency conversion speed control devices, inverter devices, UPS power supplies, inverter welding machines, electrolytic plating, CNC machine tools, micr...
Claims
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Application Information
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