CN2220664Y

CN2220664Y - A.C./D.C. generator and D.C. motor experimental device

Info

Publication number: CN2220664Y
Application number: CN 94239580
Authority: CN
Inventors: 吴正; 杨文新
Original assignee: LONGYOU COUNTY TEACHING INSTRUMENT GENERAL FACTORY ZHEJIANG PROV
Current assignee: LONGYOU COUNTY TEACHING INSTRUMENT GENERAL FACTORY ZHEJIANG PROV
Priority date: 1994-11-02
Filing date: 1994-11-02
Publication date: 1996-02-21
Anticipated expiration: 2004-11-02

Abstract

The utility model discloses an A. C. /D. C. generator and D. C. motor experimental device for physics instruction, which is mainly composed of a stator of a U-shaped magnet, a rectangular coil rotor, a coil conductor wire-leading socket and a changeable collecting ring or a commutator. The rotor is positioned in the bearing hole of a rotating shaft in the middle position of the bottom of the stator through a roller ball. Detachable iron cores are also arranged in the rotor. The device has simple structure as well as large visibility, and the students can understand the principle easily. When used as a power generator, the utility model can generate high voltage and current; when used as a motor, the utility model can rotate under 1.5V direct current. The utility model can also demonstrate the properties of the magnet and the iron core and carry out the experiment of the right and left hand rule. The utility model has positive operation significance for students to comprehend and master teaching contents.

Description

Double current generator and direct current motor experimental provision

The utility model relates to double current generator and the direct current motor experimental provision that a kind of physics teaching is used.

In the teaching of double current generator and dc electromotor principle, in order to make the content of courses help the student to go intuitively to understand and grasp better, often demonstrate by experimental provision simple and easy, this experimental provision mainly is made up of the stator and the rotor winding of permanent magnet, both can make alternator after loading onto current collector or commutator in the rotating shaft, also can make Dyn., and under the external power supply state, also can do the motor demonstration, but employed this double current generator and its inner structure of direct current motor experimental provision are compact complicated at present, and closure is bigger, the dismounting inconvenience of rotor, the visibility that makes it structure is relatively poor, so it is relatively poor to be familiar with effect to the sense organ that the student brings, in addition, the voltage of output when doing the generator demonstration, electric current is all very little, can only when face is done the motor demonstration, need to supply with very high voltage again with galvanometer or diode displaying.

The purpose of this utility model is to provide a kind of the work can produce big voltage and current when generator is demonstrated for the deficiency that solves above technology, doing motor when demonstration only needs very that small voltage can rotate, and can also change double current generator and the direct current motor experimental provision of rotor magnetic flux to adjust its output voltage and electric current arbitrarily simultaneously.

In order to achieve the above object, double current generator that the utility model is designed and direct current motor experimental provision, it comprises that stator, rotor, winding wire draw socket, stator is a horseshoe magnet, and rotor is a square coil, and stator is provided with the rotor shaft support holes, be provided with ball in the support holes, this ball can be directly arranged in the support holes bottom, also can rotor shaft be located in support holes with bearing type, to reduce the frictional resistance of rotor when rotating.

This double current generator and direct current motor experimental provision shirks and AC-DC conversion for convenience, winding wire draws socket and the rotor upper end fixes, winding wire is drawn socket and is connected collector ring or commutator by patching, output AC electricity when inserting collector ring, output DC when inserting commutator.

The influence of generator output voltage and motor speed is provided with the iron core that can shirk arbitrarily in rotor in order to demonstrate the variation of magnetic flux the time.

In addition, double current generator that the utility model is designed and direct current motor experimental provision, the lower rotary shaft of rotor is provided with follower gear, and the driving gear on follower gear and the support is complementary, and driving gear is provided with wind, can shirk between driving gear and the follower gear, when driving gear and follower gear were meshing, hand driving gear can output AC/DC, when feeding direct current, transmission that can be by gear or gear hang weight outward and demonstrate the external work done of motor.

Resulting double current generator of the utility model and direct current motor experimental provision are owing to be designed to detaching structure and horseshoe magnet is made stator, square coil is made rotor, therefore can make the rotor of square coil in the magnetic field of horseshoe magnet, make cutting magnetic line movement, thereby can demonstrate right-hand man's rule.This double current generator and its inner structure of direct current motor experimental provision is simple, visibility is big, can produce bigger voltage and current when making generator, do electronic and the time only need the 1.5V direct current to rotate, and can also demonstrate multiple electromagnetism experiment, it is understood the student and the grasp content of courses has active operation significance.

Fig. 1 is the general structure synoptic diagram of experimental provision described in the utility model.

Fig. 2 is the commutator structure synoptic diagram;

Fig. 3 is the core structure synoptic diagram;

Fig. 4 is the follower gear structural representation;

Fig. 5 is a generating indicator structure synoptic diagram;

Fig. 6 is the external work done experiment of a motor synoptic diagram;

Fig. 7 makes cutting magnetic line experiment synoptic diagram with u shape stator.

In conjunction with the accompanying drawings the utility model is further described below by embodiment.

Embodiment:

As shown in Figure 1, described double current generator of present embodiment and direct current motor experimental provision are mainly by horseshoe magnet stator 1, square coil rotor 2, winding wire is drawn socket 3, rotor head bearing plate 4, metal slip ring 5 and brush 6 are formed, stator 1 bottom centre is provided with rotor shaft support holes 7, be provided with ball 8 in the support holes 7, the top of support holes 7 is provided with metal shaft board 9, winding wire is drawn socket 3 and is fixed with square coil rotor 2, on two pole shoe end faces of stator 1, be provided with two and thoroughly do away with edge screw rod 10, the metal slip ring 5 that has brush 6 is located on the insulation blanket stud 10, the lower shaft 11 of rotor 2 inserts in the support holes 7, last axle 12 links to each other with insulation blanket stud 10 on the stator 1 by bearing 13 head bearing plates 4, head bearing plate 4 is provided with binding post 14, when making alternator, draw insertion collector ring 15 on the socket 3 at winding wire, brush 6 contacts with collector ring 15, when making Dyn., draw the commutator 16 that inserts on the socket 3 as shown in Figure 2 at winding wire, when needs demonstration magnetic flux change role, can insert or slough iron core 17 in square coil rotor 2, iron core 17 can be made as shown in Figure 3.In order to obtain comparatively ideal transmission effect, the lower shaft 11 of rotor 2 is provided with follower gear 18, and follower gear 18 is complementary with driving gear 19 as shown in Figure 4, and driving gear 19 can rotate by wind 20.When the demonstration generator, can on binding post 14, insert the generating indicator board of forming by pilot lamp 21 and indication plug 22 23 as shown in Figure 5, during rotary handle crank, can make pilot lamp 21 luminous, simultaneously also can be at 14 liang of termination voltage tables of binding post, to observe direction of current, when doing the direct current motor experiment, only need on binding post 14, to meet direct current 1.5-3V and can make rotor rotation.

Bearing 13 is provided with cover plate 24, and head bearing plate 4 usefulness nuts 25 are fixed on the insulation blanket stud 10, can shirk or install whole stator arbitrarily when outwarding winding bearing cover 24.

Double current generator that present embodiment provides and direct current motor experimental provision, also can do multiple electromagnetism experiment, as shown in Figure 6, when being used as the direct current motor use, but hoisting heavy, as shown in Figure 7, utilize horseshoe magnet, can do cutting magnetic line experiment, in addition, when making motor and rotate voltage constant or can be observed under the rotating speed permanence condition when making generator rotor 2 in, add iron core 17 back motors speed obviously than do not add fashionable soon or generator output voltage obviously raise; With the horseshoe magnet of this experimental provision, place it under the glass plate, spread iron filings on the glass plate and can do the magnetic induction line experiment; The horseshoe magnet side is stood up on the table, square coil is suspended on the support, drawing socket end at winding wire links to each other with inspection stream juice with flexible circuit conductor, make a limit of coil in horseshoe magnet magnetic field, do the cutting magnetic induction line motion and can demonstrate the right-hand rule, flexible circuit conductor is linked to each other with power supply can demonstrate left-hand rule.

Claims

1, a kind of double current generator and direct current motor experimental provision, it comprises that stator, rotor, winding wire draw socket, it is characterized in that described stator is a horseshoe magnet, and rotor is a square coil, stator is provided with the rotor shaft support holes, is provided with ball in the support holes.

2, double current generator according to claim 1 and direct current motor experimental provision is characterized in that winding wire is drawn socket and rotor one end fixes, and draw on the socket at winding wire and are connected with collector ring or commutator by patching.

3, double current generator according to claim 1 and 2 and direct current motor experimental provision is characterized in that being provided with in the rotor iron core that can shirk arbitrarily.

4, double current generator according to claim 1 and 2 and direct current motor experimental provision, it is characterized in that on the lower rotary shaft of rotor, being provided with follower gear, driving gear on follower gear and the support is complementary, and driving gear is provided with wind, can shirk between driving gear and the follower gear.

5, double current generator according to claim 3 and direct current motor experimental provision, it is characterized in that on the lower rotary shaft of rotor, being provided with follower gear, driving gear on follower gear and the support is complementary, and driving gear is provided with wind, can shirk between driving gear and the follower gear.