Demonstration instrument for driving principle of dual-mode brush direct current motor

Abstract

The utility model provides a dual-mode brush direct current motor driving principle demonstration instrument, which relates to the technical field of demonstration instrument equipment, and comprises a mounting table, a vertical frame is fixed on the upper surface of the mounting table, magnets are fixed on the surfaces of the two sides of the vertical frame, and the magnetic poles of the opposite surfaces of the two magnets are arranged oppositely. The surface of the mounting table is rotatably connected with a mounting column, and the sleeve frame moves along the track rod and is clamped at the upper end or the lower end of the connecting frame, so that the electric brush mounted on the sleeve frame is in contact with the upper current commutator segment or the lower current commutator segment, and the contact object of the electric brush can be easily changed. Therefore, two rotating modes of a multi-turn wire frame and a single-turn wire frame can be easily switched back and forth, and convenience is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to demonstration instrument equipment technical field especially relates to double mode has the brush DC motor drive principle demonstration instrument. BACKGROUND

[0002] The brush DC motor is a kind of DC motor, and the stator of brush motor is installed with fixed main magnetic pole and brush, and the rotor is installed with armature winding and commutator. The electric energy of DC power supply enters armature winding through brush and commutator, generates armature current, and the magnetic field generated by armature current interacts with main magnetic field to generate electromagnetic torque, so that motor rotates and drives load.

[0003] But in the prior art, in order to demonstrate more intuitively the influence of different number of turns on motor driving speed, the existing brush DC motor drive principle demonstration instrument generally prepares single-turn wire frame and multi-turn wire frame two modes for comparison demonstration, but the demonstration instrument generally needs manual disassembly and installation of wire frame when changing from single-turn wire frame demonstration to multi-turn wire frame demonstration, which is more troublesome to operate. UTILITY MODEL CONTENTS

[0004] The utility model discloses a double mode brush DC motor drive principle demonstration instrument, which can automatically change from single-turn wire frame demonstration to multi-turn wire frame demonstration without manual disassembly and installation of wire frame, so that the operation is more convenient.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme: a double mode brush DC motor drive principle demonstration instrument, comprising a mounting table, the upper surface of the mounting table is fixed with a stand, and the surfaces of the two sides of the stand are both fixed with a magnet, the opposite surfaces of the two magnets are oppositely arranged, the surface of the mounting table is rotatably connected with a mounting column, and the lower end and the upper end of the mounting column are respectively fixed with a lower current commutator and an upper current commutator, the top of the mounting column is fixed with a multi-turn wire frame and a single-turn wire frame, and the multi-turn wire frame and the single-turn wire frame are respectively fixedly connected with the lower current commutator and the upper current commutator, the surfaces of the two sides of the mounting table located at the two sides of the mounting column are both fixed with a connecting frame, and the surface of the connecting frame is fixed with a track rod, the track rod is slidably connected with a sleeve frame, and the upper end and the lower end of the sleeve frame are both clampedly connected with the connecting frame, the sleeve frame is fixed with a brush, the surface of the mounting table located at one side of the mounting column is fixed with a power box, and the positive and negative poles of the power box are both fixedly connected with an electric wire, and one end of the electric wire is fixedly connected with the brush.

[0006] As a preferred embodiment, the top surface of the single-turn wire frame is fixedly connected with a stabilizing rod, and the stabilizing rod is rotatably connected with the stand.

[0007] As a preferred embodiment, the mounting column, the stabilizing rod and the sleeve frame are all made of insulating material.

[0008] As a preferred implementation, the surface of the installation platform is fixedly connected with a current switch on the positive side of the power box, and both sides of the current switch are fixedly provided with electric wires.

[0009] Compared with the prior art, the utility model has the advantages and positive effects that:

[0010] 1、The utility model discloses when the brush contacts the upper current commutating segment, the upper current commutating segment, single -turn wire frame and brush are electrified with the help of power box and electric wire, and the single -turn wire frame generates the magnetic field after electrifying, and the single -turn wire frame is always actively rotated under the cooperation of the magnet and the upper current commutating segment, when the brush contacts the lower current commutating segment, and after electrifying, it is same with above -mentioned, make the multi -turn wire frame can always actively rotate, and the multi -turn wire frame is more than the number of turns of single -turn wire frame, so the rotation rate of single -turn wire frame is fast, and the driving condition of two kinds of motors is simulated through the demonstration comparison of two kinds of rotation modes of multi -turn wire frame and single -turn wire frame, and the influence of the number of turns on the driving rate of motor can be directly shown.

[0011] 2、Through the movement of the sleeve frame along the rail rod, the sleeve frame is clamped at the upper end or the lower end of the connecting frame, so that the brush installed on the sleeve frame contacts the upper current commutating segment or the lower current commutating segment, so that the contact object of the brush can be easily changed, and the two kinds of rotation modes of the multi -turn wire frame and the single -turn wire frame can be easily switched back and forth, which is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 The utility model provides a structure schematic drawing of double mode brush DC motor driving principle demonstration instrument,

[0013] Fig. 2 The utility model provides a structure schematic drawing of double mode brush DC motor driving principle demonstration instrument,

[0014] Fig. 3 The utility model provides a structure schematic drawing of double mode brush DC motor driving principle demonstration instrument.

[0015] LEGEND:

[0016] 1, installation platform, 2, stand, 3, magnet, 4, mounting column, 5, lower current commutating segment, 6, upper current commutating segment, 7, multi -turn wire frame, 8, single -turn wire frame, 9, stabilizer, 10, connecting frame, 11, rail rod, 12, sleeve frame, 13, brush, 14, power box, 15, electric wire, 16, current switch. DETAILED DESCRIPTION

[0017] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0018] Example 1

[0019] As Figs. 1-3The utility model provides a technical scheme: dual mode has the demonstration appearance of the principle of the drive of brush DC motor, including installation platform 1, the upper surface of installation platform 1 is fixed with riser 2, the setting of riser 2 is convenient and is fixed with magnet 3 is arranged in the both sides of multiple turns wire frame 7 or single turn wire frame 8, and the both sides surface of riser 2 is fixed with magnet 3, and the opposite surface magnetic pole of two magnet 3 is opposite and is arranged, when multiple turns wire frame 7 or single turn wire frame 8 is electrified, will produce magnetic field, through let the magnetic field of magnet 3 interact with the magnetic field of multiple turns wire frame 7 or single turn wire frame 8 and produce electromagnetic torque, further makes multiple turns wire frame 7 or single turn wire frame 8 active rotation, the surface of installation platform 1 is rotatably connected with mounting column 4, and the lower end and the upper end of mounting column 4 are fixed with lower current commutating sheet 5 and upper current commutating sheet 6 respectively, the top of mounting column 4 is fixed with multiple turns wire frame 7 and single turn wire frame 8, and multiple turns wire frame 7 and single turn wire frame 8 are fixed with lower current commutating sheet 5 and upper current commutating sheet 6 respectively, lower current commutating sheet 5 and upper current commutating sheet 6 change the effect of the current direction of multiple turns wire frame 7 and single turn wire frame 8, after the current direction of multiple turns wire frame 7 and single turn wire frame 8 changes, the magnetic field polarity of multiple turns wire frame 7 and single turn wire frame 8 will also change, the surface of installation platform 1 is fixed with connecting frame 10 on the both sides of mounting column 4, and the surface of connecting frame 10 is fixed with track rod 11, the track rod 11 is slidably connected with sleeve frame 12, and the upper end and the lower end of sleeve frame 12 are engaged with connecting frame 10, and sleeve frame 12 is fixed with brush 13, by letting sleeve frame 12 move along track rod 11, let it engage on the upper end or lower end of connecting frame 10, so that the brush 13 installed on sleeve frame 12 contacts upper current commutating sheet 6 or lower current commutating sheet 5, so that the contact object of brush 13 can be easily changed, the surface of installation platform 1 is fixed with power box 14 on the side of mounting column 4, and the positive and negative poles of power box 14 are fixedly connected with electric wire 15, and one end of electric wire 15 is fixedly connected with brush 13, when brush 13 contacts upper current commutating sheet 6, upper current commutating sheet 6, single turn wire frame 8 and brush 13 are electrified with the help of power box 14 and electric wire 15, single turn wire frame 8 generates magnetic field after electrification, through the cooperation of magnet 3 and upper current commutating sheet 6, let single turn wire frame 8 always active rotation, when brush 13 contacts lower current commutating sheet 5, after electrification, it is same with above, make multiple turns wire frame 7 can always active rotation, and multiple turns wire frame 7 is more than single turn wire frame 8 in the number of turns, so the rotation rate of multiple turns wire frame 7 is faster than single turn wire frame 8.

[0020] Example 2

[0021] As Figs. 1-3As shown, a stabilizing rod 9 is fixedly connected to the top surface of the single-turn wire frame 8, and the stabilizing rod 9 is rotatably connected to the upright 2. The connection between the stabilizing rod 9 and the upright 2 can effectively improve the stability of the single-turn wire frame 8 and the mounting column 4 during rotation. The mounting column 4, the stabilizing rod 9 and the sleeve frame 12 are all made of insulating material, which effectively prevents leakage when the lower current commutator 5, the upper current commutator 6, the multi-turn wire frame 7, the single-turn wire frame 8 and the brush 13 are energized. A current switch 16 is fixedly connected to the side of the mounting platform 1 located on the positive terminal of the power supply box 14, and wires 15 are fixed to both ends of the current switch 16. With the help of the current switch 16, the current in the wires 15 is cut off.

[0022] Working principle:

[0023] like Figs. 1-3 As shown, when using this utility model, the user first turns on the current switch 16 to allow the electricity in the power supply box 14 to flow in the wire 15, and then energizes the brush 13. When the brush 13 contacts the upper current commutator 6, it will also energize the upper current commutator 6 and the single-turn wire frame 8. After being energized, the single-turn wire frame 8 will generate its own magnetic field, and the magnetic field of the single-turn wire frame 8 will interact with the magnetic field of the magnet 3 on the stand 2, thus causing the single-turn wire frame 8 to rotate on its own. The rotation of the single-turn wire frame 8 will drive the rotation of the mounting column 4 and the upper current commutator 6. During the rotation of the upper current commutator 6, the brush 13 on one side will alternately contact the two upper current commutator 6, thereby changing the direction of the current on the single-turn wire frame 8 back and forth. The change of the current direction will change the polarity of the magnetic field on the single-turn wire frame 8, so that the single-turn wire frame 8 can continue to rotate under the influence of the magnet 3.

[0024] When you want the multi-turn wire frame 7 to rotate actively, first turn off the current switch 16 to stop the current from flowing through the wire 15 and de-energize the brush 13. Then, manually slide the sleeve 12 down along the track rod 11 so that the sleeve 12 changes from being engaged at the upper end of the connecting frame 10 to being engaged at its lower end. This changes the contact between the brush 13 and the upper current commutator 6 and the lower current commutator 5. Then, turn on the current switch 16 to re-energize the brush 13, which in turn energizes the lower current commutator 5 and the multi-turn wire frame 7. After being energized, the multi-turn wire frame 7 will also rotate actively. Since the multi-turn wire frame 7 has more turns than the single-turn wire frame 8, its rotation speed is faster than that of the single-turn wire frame 8. By demonstrating and comparing the two rotation modes of the multi-turn wire frame 7 and the single-turn wire frame 8, the driving situation of the two motors can be simulated, which can intuitively show the influence of the number of turns on the motor driving speed.

[0025] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields with equivalent changes, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. A dual-mode brush DC motor drive principle demonstration instrument, comprising a mounting table (1), characterized in that: The upper surface of the mounting table (1) is fixed with a stand (2), and the two side surfaces of the stand (2) are fixed with magnets (3), the opposite surfaces of the two magnets (3) are oppositely arranged, the surface of the mounting table (1) is rotatably connected with a mounting column (4), and the lower end and the upper end of the mounting column (4) are respectively fixed with a lower current commutating sheet (5) and an upper current commutating sheet (6), the top of the mounting column (4) is fixed with a multi-turn wire frame (7) and a single-turn wire frame (8), and the multi-turn wire frame (7) and the single-turn wire frame (8) are respectively fixedly connected with the lower current commutating sheet (5) and the upper current commutating sheet (6), the surface of the mounting table (1) is fixed with a connecting frame (10) on both sides of the mounting column (4), and the surface of the connecting frame (10) is fixed with a track rod (11), the track rod (11) is slidably connected with a sleeve frame (12), and the upper end and the lower end of the sleeve frame (12) are clamped and connected with the connecting frame (10), the sleeve frame (12) is fixed with an electric brush (13), the surface of the mounting table (1) is fixed with a power box (14) on one side of the mounting column (4), and the positive and negative electrodes of the power box (14) are fixedly connected with electric wires (15), and one end of the electric wire (15) is fixedly connected with the electric brush (13).

2. The dual-mode brushed DC motor drive principle demonstration instrument according to claim 1, characterized in that: The top surface of the single-turn wire frame (8) is fixedly connected with a stabilizing rod (9), and the stabilizing rod (9) is rotatably connected with the stand (2).

3. The dual-mode brushed DC motor drive principle demonstration instrument of claim 1, wherein: The mounting column (4), the stabilizing rod (9) and the sleeve frame (12) are all made of insulating materials.

4. The dual-mode brushed DC motor drive principle demonstration instrument of claim 1, wherein: The surface of the mounting table (1) is fixedly connected with a current switch (16) on one side of the positive electrode of the power box (14), and the two side ports of the current switch (16) are fixedly connected with electric wires (15).

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