CN2160966Y

CN2160966Y - Electromagnet pilot unit

Info

Publication number: CN2160966Y
Application number: CN 93209480
Authority: CN
Inventors: 金毅; 郑小利
Original assignee: EDUCATIONAL INSTRUMENT INST STATE EDUCATION COMMISSION
Current assignee: EDUCATIONAL INSTRUMENT INST STATE EDUCATION COMMISSION
Priority date: 1993-04-19
Filing date: 1993-04-19
Publication date: 1994-04-06
Anticipated expiration: 2003-04-19

Abstract

The utility model discloses an electromagnet experimental device. The utility model comprises a bracket 1, an inserting plate 2, a coil 3, an iron core 4, a magnetic needle 5, a suspension loop 6, etc. The purposes that the Ampere's rule is studied and the factors of the magnetic performance of the electromagnet is influenced with the method of vertically and transversely laying the electromagnet and altering the current intensity of the coil 3 are achieved.

Description

Electromagnet pilot unit

The utility model belongs to instruments used for education, uses for junior middle school student's Physical Experiment.

At present, domestic do not have a student experimenting electromagnet experiment teaching aid, only has a kind of teacher to do the U type electromagnet that lecture experiment is used, and it is not suitable for student experiment in group.

The purpose of this utility model is to be that China popularizes junior middle school's compulsory education, and the physics student experiment of finishing the syllabus defined provides a kind of clear in structure, easy to use, both instruments used for education of available AC power (band transformer) also available direct supply (comprising dry cell batteries).

Structure of the present utility model as shown in the figure.Among the figure, 1 is support, and 2 is plate, and 3 is coil, and 4 is iron core, and 5 are the needle of usheing to seat, and 6 is link.Support 1, coil 3 and iron core 4 constitute an electromagnet.The coil 3 of plate 2 both sides is independently, can form a big coil by the binding post on the plate 2, the skin of coil 3 can wrap up one deck semitransparent thin film, its skin is last layer line circle, the number of turn of coil is not limit, and can be the coil of 3-50 circle, its around to the film interior loop around to identical and clear distinguishing, pass through when the student uses coil 3 around to and sense of current, available Ampere's law is judged the magnetic pole of energization solenoid.Iron core 4 can be an iron core, and adopt several groups of (2-5 group) discrete coils to distribute vertically this moment, and also a total iron core that can be formed by connecting vertically for several iron cores all has one group of coil on every iron core at this moment.

Iron core 4 is can be all kinds of iron cores that those skilled in the art are familiar with in the utility model.Preferred iron core 4 is soft magnet cores.Iron core 4 slightly is longer than coil 3, thereby the one end stretches out from coil 3, guarantees that coil 3 can be that fulcrum vertically is placed on the desktop with this end of iron core 4 and the leg of binding post, also can link by plate 2 and another group solenoid by this end.When electromagnet is upright state, closed experimental circuit, the link 6 that the pull-up straight up of available dynamometer is attracted by electromagnet is measured the size of electromagnetic force, thereby can be finished the magnetic of electromagnet and the relevant experiment of break-make of electric current.Change the size by coil 3 electric currents, the magnetic that can finish electromagnet is strong and weak with the relevant experiment of size of current.When adopting the segment type iron core, can shed a joint or a few joint iron core and be connected in top coil, when adopt be an all-in-one-piece iron core time, can the number of turn be changed, so just can finish the strong and weak experiment of following coil 3 numbers of turn to concern of magnetic of electromagnet.

The structure of electromagnet of the present utility model has guaranteed that it can erect, and also can crouch and put, and crouches and connects when putting behind the circuit by putting the deflection of needle at one end, can judge sense of current in the coil 3, further is familiar with Ampere's law.

Claims

1, a kind of electromagnet experimental apparatus, the coil (3), iron core (4), link (6), the needle of usheing to seat (5) that comprise a belt supporting frame (1), it is characterized in that coil (3) comprises 2-5 discrete coil, the centre has plate (2) to separate, there is one deck semitransparent thin film each coil (3) outer ring, and semitransparent thin film outside has one around to clear, coil uniformly at interval.

2, by the described electromagnet experimental apparatus of claim 1, it is characterized in that iron core 4 stretches out from coil 3, thereby electromagnet can be placed vertically.

3,, it is characterized in that having the link (6) that to hold dynamometer by the described electromagnet experimental apparatus of claim 1.

4,, it is characterized in that the number of turn of the coil of semitransparent thin film outside is the 3-50 circle by the described electromagnet experimental apparatus of claim 1.