BI-STABLE ELECTROMAGNET

Abstract

A bi-stable electromagnet, comprising block permanent magnets, a coil package, a reversible magnet, a magnetizer and a casing, wherein the reversible magnet is disposed in an inner cavity on the upper half part of the casing; the peripheral side of the reversible magnet is coated with the coil package; the upper and lower surfaces of the reversible magnet have different magnetic poles; a magnetic axis of the reversible magnet is superposed with a geometric center axis of the reversible magnet; the upper surface of the reversible magnet is attached to the casing; the magnetizer is disposed in an inner cavity of the lower half part of the casing; the lower surface of the reversible magnet is attached to the magnetizer.

Claims

1. A bi-stable electromagnet, comprising block permanent magnets (1), a coil package (2), a reversible magnet (3), a magnetizer (4) and a casing (5), wherein the reversible magnet (3) is disposed in an inner cavity on the upper half part of the casing (5); the peripheral side of the reversible magnet (3) is coated with the coil package (2); a magnetic axis of the reversible magnet is superposed with a geometric center axis of the reversible magnet; the upper and lower surfaces of the reversible magnet (3) are different magnetic poles; the upper surface of the reversible magnet (3) is attached to the casing (5); the magnetizer (4) is disposed in an inner cavity of the lower half part of the casing (5); the lower surface of the reversible magnet (3) is attached to the magnetizer (4); a plurality of independent block permanent magnets (1) which are uniformly arranged along the circumference of the magnetizer (4) is disposed between the magnetizer (4) and the inner wall of the inner cavity on the lower half part of the casing (5); the polarity arrangement of adjacent block permanent magnets remains the same, i.e., the sides of the adjacent block permanent magnet close to the casing are one poles and the sides thereof close to the magnetizer are the other poles; and the magnetic axis points to the center of the circumference of the magnetizer (4).

2. The bi-stable electromagnet according to claim 1, wherein the casing is made of a permeability magnetic material.

3. The bi-stable electromagnet according to claim 1, wherein a gap in which a plurality of block permanent magnets is placed is arranged between the casing (5) and the magnetizer (4), and the distribution and quantity of the block permanent magnets are based on the magnetic field balance.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 is a bottom view of the present invention.

[0010] FIG. 2 is a main view of the present invention.

[0011] In drawings, the reference symbols represent the following components: 1block permanent magnet; 2coil package; 3reversible magnet; 4magnetizer; 5casing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The technical solution of the present invention will be further clarified with reference to the accompanying drawings and embodiments, and will be apparent to those skilled in the art.

[0013] A bi-stable electromagnet structurally comprises block permanent magnets 1, a coil package 2, a reversible magnet 3, a magnetizer 4, and a casing 5. The casing 5 is also made of a permeability magnetic material.

[0014] As shown in FIG. 2, firstly, the reversible magnet 3 is disposed in an inner cavity on the upper half part of the casing 5. The peripheral side of the reversible magnet 3 is coated with the coil package 2. A magnetic axis of the reversible magnet is superposed with a geometric center axis of the reversible magnet. The upper and lower surfaces of the reversible magnet 3 have different magnetic poles. The upper surface of the reversible magnet 3 is attached to the casing 5.

[0015] As shown in FIG. 1, the magnetizer 4 is disposed in an inner cavity of the lower half part of the casing 5. The lower surface of the reversible magnet 3 is attached to the magnetizer 4. A gap in which the plurality of block permanent magnets 1 is placed is arranged between the casing 5 and the magnetizer 4. A plurality of independent block permanent magnets 1 is uniformly arranged along the circumference of the magnetizer 4. The polarity arrangement of adjacent block permanent magnets 1 remains the same. The magnetic axis points to the center of the circumference of the magnetizer 4, i.e., the sides of the adjacent block permanent magnet close to the casing are one poles and the sides thereof close to the magnetizer are the other poles. The distribution and quantity of the block permanent magnets are based on the magnetic field balance.

[0016] There is a certain proportional relationship between the size of each permanent magnet and the size of the reversible magnet. Influenced by the magnetic field intensity of the permanent magnets and the magnetization intensity of the reversible magnet, when the volume and the magnetic field intensity of the reversible magnet are fixed, the size and distribution of the permanent magnets are determined. Theoretically, it is feasible but actually requires an infinite number of combinations in shapes and volumes to achieve a balance between a magnetic state and a non-magnetic state, otherwise there will be residual magnetism in the non-magnetic state. The bi-stable electromagnet of the present invention solves the problem of the balance between the magnetic state and the non-magnetic state by increasing or decreasing the number of distributed permanent magnets, thereby making the process of the present invention simple and efficient.

Embodiment 1

[0017] The magnetic state operation is selected: the power-on trigger is determined instantaneously, and the process is as follows:

[0018] the polarity arrangement of adjacent block permanent magnets 1 remains the same; the magnetic axis points to the center of the circumference of the magnetizer 4, i.e., the sides of the adjacent block permanent magnets close to the casing 5 are N poles and the sides thereof close to the magnetizer 4 are S poles; a current is triggered by powering on to magnetize the reversible magnet 3 through the coil 2 and to obtain a magnetic field; the upper surface of the reversible magnet 3 is N pole, and the lower surface thereof is S pole; the upper surface of the reversible magnet 3 is attached to the casing and is the N pole for conducting the casing 5; the lower surface of the reversible magnet 3 is attached to the magnetizer 4 and is the S pole for conducting the magnetizer 4; at this time, the magnetic field formed by the reversible magnet and the magnetic field formed by the block permanent magnets are superimposed to generate a strong magnetic force, and the magnetic stable state is formed, which has an attraction to the permeability magnetic material.

Embodiment 2

[0019] The non-magnetic state operation is selected: the power-on trigger is determined instantaneously, and the process is as follows:

[0020] the polarity arrangement of adjacent block permanent magnets 1 remains the same; the magnetic axis points to the center of the circumference of the magnetizer 4, i.e., the sides of the adjacent block permanent magnets close to the casing are N poles and the sides thereof close to the magnetizer 4 are S poles; a reverse current is triggered by powering on to magnetize the reversible magnet 3 through the coil 2 and to obtain a reverse magnetic field;

[0021] the upper surface of the reversible magnet 3 becomes S pole, and the lower surface thereof becomes N pole; the upper surface of the reversible magnet 3 is attached to the casing 5 and is the S pole for conducting the casing 5; the lower surface of the reversible magnet 3 is attached to the magnetizer 4 and is the N pole for conducting the magnetizer 4; at this time, the magnetic field formed by the reversible magnet and the magnetic field formed by the block permanent magnets attract with each other to form self-closure, and the non-magnetic stable state is formed, which has no attraction to the permeability magnetic material.