CN206921630U

CN206921630U - Permanent magnet bias inductor

Info

Publication number: CN206921630U
Application number: CN201720550285.5U
Authority: CN
Inventors: 傅璐璐; 赵洪
Original assignee: Lishui Vocational Technical College
Current assignee: Lishui Vocational Technical College
Priority date: 2017-05-11
Filing date: 2017-05-11
Publication date: 2018-01-23
Anticipated expiration: 2027-05-11

Abstract

A kind of band permanent magnet bias inductor, it is made up of iron core 1, biasing permanent magnet 2 and coil 3, there is one of space in its iron core 1, permanent magnet bias magnet 2 made of permanent magnet is inserted in space, caused magnetic flux Φ 1 is in opposite direction in the core 1 with the DC component by the pulsation alternating current in inductance coil 3 in the caused directions of magnetic flux Φ 2 in the core for permanent magnet bias body, and both cancel out each other.Inductor iron core is always worked near B-H loop central point, substantially increases the effective inductance amount of inductor, so as to reduce the volume and manufacturing cost of same inductance value inductor.

Description

Permanent magnet bias inductor

Technical field

A kind of filter inductor is the utility model is related to, more particularly to works in the filter inductor of DC pulse state.

Background technology

Inductor is one of the most frequently used electrical equipment, currently with the development of Power Electronic Technique, to inductor requirement More and more higher, it is mainly manifested in and reduces volume, reduce cost, improve inductance value.Inductor composition is substantially by iron core, coil Two is most, and the magnetic saturation intensity in iron core is directly connected to the inductance value size of inductor, the size of iron core also direct relation To weight and the volume size of inductor, in order to reduce volume increase inductance value, it is necessary to use high performance iron core, this is again significantly Improve the price of product.

Utility model content

To solve foregoing problems, the utility model provides a kind of new inductor, the energy in DC pulse filter circuit The characteristics of enough realizing high-performance, big inductance quantity, so as to reduce the volume and manufacturing cost of same inductance value inductance.

The utility model provides a kind of inductor of new structure, and its technical scheme is a kind of inductance with permanent magnet bias Device, it is made up of iron core 1, biasing permanent magnet 2 and coil 3, it is characterised in that：There is one of space in inductor core 1, in space Insert lift magnet 2 made of permanent magnet, what lift magnet passed through in the caused directions of magnetic flux Φ 2 and coil 3 in the core Caused magnetic flux Φ 1 is in opposite direction in the core for DC component in pulsation alternating current, and both cancel out each other.

Have the advantage that permanent magnet preset in the core can produce one in advance in the core using the utility model Magnetic flux is biased, the magnetic flux is at work with passing through magnetic flux phase caused by the current dc component in alternating current of being pulsed in inductance coil To offset, it is ensured that the magnetic operating point of iron core near zero-bit, effectively avoids iron core and enters zone of saturation all the time, for The inductance of different capacity, the thickness can for adjusting permanent magnet reach the pre- magnetic bias field intensity adjusted in iron core, iron core is worked In permeability maximum rating, so as to substantially increase the effective inductance amount of inductor, reach the mesh for reducing volume, reducing cost 's.

Brief description of the drawings

Fig. 1 shows principle and structure of the present utility model, 1 is inductor iron core in figure, 2 is inductor permanent magnet bias body, 3 For inductor coil；

Fig. 2 is the utility model one inductor special case of E font fabrication of iron core, 1 is inductor iron core in figure, 2 is Inductor permanent magnet bias body, 3 are inductor coil.

Embodiment

It refer to Fig. 1 and the utility model inductor that the utility model uses annular core to be made for basic structure be shown, Annular core 1 in figure is provided with a groove at an arbitrary position, and the permanent magnet bias body 2 that permanent magnet makes, coil 3 are inserted in groove It is wound on above iron core 1, when the direction of coil winding is so that inductance work, by produced by the current dc component in coil Magnetic flux Φ 1 direction and permanent magnet bias body 2 caused magnetic flux Φ 2 is in opposite direction in the core, both cancel out each other.

Fig. 2 is inductor of the utility model using the common E font fabrication of iron core of inductor, in the main magnetic circuit of iron core Between stay a space, permanent magnet bias body 2 is inserted in space, coil winding formed on the stem of iron core one band permanent magnet bias Inductor, its permanent magnet bias body can also be located at iron circuit in any position.

Described above is only preferred embodiment of the present utility model, not to limit the utility model, at this Any modification without technological improvement for being made within utility model spirit and principle, equivalent substitution etc., should be included in this reality Within new protection domain.

Claims

1. a kind of permanent magnet bias inductor, it is made up of iron core (1), biasing permanent magnet (2) and coil (3), it is characterised in that：Electricity There is one of space in sense iron core (1), permanent magnet bias magnet (2) made of permanent magnet, permanent magnet bias magnet are inserted in space In the core caused magnetic flux (Φ 2) direction with by inductance coil (3) pulsation alternating current DC component in iron core (1) In caused magnetic flux (Φ 1) in the opposite direction, both cancel out each other.