CN101452754A

CN101452754A - Microsecond level quick electromagnet

Info

Publication number: CN101452754A
Application number: CNA200710156997XA
Authority: CN
Inventors: 周才扬
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-29
Filing date: 2007-11-29
Publication date: 2009-06-10

Abstract

The invention discloses a microsecond level rapid electromagnet, wherein coils are fixedly embedded in cylindrical iron yokes, and an iron core is positioned at the axle center of the coils and can axially move. The electromagnet is characterized in that in a plastic shell, two groups of iron yokes and coils which have the same shape and size are coaxially and oppositely arranged, and are an upper iron yoke, a lower iron yoke, an upper coil and a lower coil respectively, the iron core is positioned in a cavity of the axle center of the two coils, the bottom of the lower iron yoke is provided with a hole, a connecting rod passes through the hole and is connected with the iron core, and the upper coil and the lower coil are connected with the corresponding output end of an electronic control circuit respectively. During the switching, a magnetic field force produced by the opposite coil attracts the iron core to quick act, which overcomes the influence of residual magnetism of the prior electrified electromagnet, has quick response speed of an electronic circuit, and realizes the quick response of the electromagnet.

Description

Microsecond level quick electromagnet

Technical field

The present invention relates to electric element, particularly to the improvement of electromagnet.

Background technology

Electromagnet is widely used in electronic control field, and present electromagnet is made up of a cover iron yoke, coil and armature or iron core, and behind the coil electricity, iron yoke and iron core have magnetic, attract each other, and make iron core produce action, in order to drive controlling mechanism.

Because the material that iron yoke and iron core adopt is generally pure iron, silicon steel, ferrite etc., and remanent magnetism is unavoidably arranged, and causes the electromagnet response lag.In the mechanical device of some high-speed cruisings, as petrolic oil atomizer, the valve of automatically controlled variable timing (VVT) etc., be no more than 1ms whole operate time, this hysteresis has caused the control action reaction untimely, need reserve the reaction time by controlling computer, influence the accuracy of control.

Summary of the invention

The object of the invention is to provide a kind of material remanent magnetism influence that overcomes, and reaction speed reaches the flash electromagnet of microsecond level, to adapt to the use needs of High-speed Control mechanism.

The solution of the present invention is: microsecond level quick electromagnet, in the iron yoke of tubular, fixedly be embedded with coil, iron core is in the axle center of coil, can move axially, it is characterized in that: in plastic casing, have identical iron yoke of two groups of shapes size and coil coaxial, set up in opposite directions, be respectively upper yoke and lower yoke, go up coil and lower coil, iron core is arranged in the cavity in two coil axle center, the lower yoke bottom opening, and connecting rod passes this hole and is connected on the iron core.

Last coil is connected with the corresponding output end of electronics control switching circuit respectively with lower coil.

Advantage of the present invention is: because opposition is provided with two groups of electromagnet, with the electronics control switching circuit to the switching of switching on of two coils, during switching, the magnetic field force that planar coil is produced attracts the iron core quick acting, overcome the influence of former energising electromagnet remanent magnetism, the electronic circuit response speed is fast, has realized the fast reaction of electromagnet.

Description of drawings

The invention will be further described with embodiment with reference to the accompanying drawings below.

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is the circuit diagram of electronics control switching circuit.

Mark among Fig. 1: 1 pin, 2 plastic casings, 3 upper yokes, coil on 4, magnetic pole on 5,6 cage rings, 7 iron cores, 8 lower magnetic poles, 9 lower yokes, 10 lower coil, 11 bases, 12 connecting rods.

Mark among Fig. 2: V _CCPower end, A control end, D1, D2 fly-wheel diode, R1, R2, R3 biasing resistor, T1, T2, T3 triode.

Embodiment

As shown in Figure 1, the microsecond level quick electromagnet of embodiment, in the plastic casing 2 of a tubular, two is embedded with two groups of identical iron yoke and coils of shape size up and down, they are set up in opposite directions, be in same axis, upper yoke 3 and last coil 4 and last magnetic pole 5 are formed upward electromagnet, and lower yoke 9 and lower coil 10 and lower magnetic pole 8 are formed lower electromagnets.

Iron core 7 is arranged in the cavity in two coil axle center, wherein one the other end is in lower electromagnet in last electromagnet, but iron core 7 easy on and off move.

The bottom opening of lower yoke 9, connecting rod 12 passes this hole and is connected on the iron core 7.

Last coil 4 is connected with the corresponding output end of electronics control switching circuit respectively with lower coil 10.

The principle of electronics control switching circuit is analyzed the course of work of the present invention below in conjunction with Fig. 1 and Fig. 2 referring to Fig. 2.

As power end V _CCEnergized, T2 conducting this moment, T1 end, last coil 4 energisings, iron core 7 is attracted to move by last coil 4.

When control end A gets electricly, T3 conducting this moment ends T2, the T1 conducting, and last coil 4 outages, lower coil 10 energisings, iron core 7 is moved down by lower coil 10 attractions.

Because the on-off effect speed of triode is fast, can reach 0.01us, thereby the switch speed of two coils also can reach 0.01us, but be subjected to iron core because influence the operate time that time-delay that effect of inertia causes and iron core are finished whole stroke, reaction speed of the present invention can reach 10us, is fit to the use needs of oil atomizer, electric control valve.

Claims

1. microsecond level quick electromagnet, in the iron yoke of tubular, fixedly be embedded with coil, iron core is in the axle center of coil, can move axially, it is characterized in that: in plastic casing (2), have identical iron yoke of two groups of shapes size and coil coaxial, set up in opposite directions, be respectively upper yoke (3) and lower yoke (9), go up coil (4) and lower coil (10), iron core (7) is arranged in the cavity in two coil axle center, lower yoke (9) bottom opening, and connecting rod (12) passes this hole and is connected on the iron core (7).

2. microsecond level quick electromagnet as claimed in claim 1 is characterized in that: go up coil (4) and be connected with the corresponding output end of electronics control switching circuit respectively with lower coil (10).