CN105225585A - Adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control - Google Patents
Adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control Download PDFInfo
- Publication number
- CN105225585A CN105225585A CN201510607307.2A CN201510607307A CN105225585A CN 105225585 A CN105225585 A CN 105225585A CN 201510607307 A CN201510607307 A CN 201510607307A CN 105225585 A CN105225585 A CN 105225585A
- Authority
- CN
- China
- Prior art keywords
- phase
- magnetic field
- rotating magnetic
- induction motor
- selsyn generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/181—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for electric and magnetic fields; for voltages; for currents
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Algebra (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control, belong to machine teaching field, the present invention is that the existing rotating magnetic field demonstrator of solution can not meet intuitively, lively, these problems required of image.The present invention includes handle, selsyn generator, synchronous phase-sensitive demodulating circuits and three-phase induction motor; Handle drives the rotor turns of selsyn generator, and the stator winding of selsyn generator exports three-phase alternating current electric signal; This three-phase alternating current electric signal processes by synchronous phase-sensitive demodulating circuits, removes its higher hamonic wave, only retains its envelope, three-phase symmetrical ac signal after output demodulation; After described demodulation, three-phase symmetrical ac signal passes in the stator winding of three-phase induction motor, exports the rotating magnetic field for demonstration by the rotor of three-phase induction motor.
Description
Technical field
The present invention relates to the apparatus for demonstrating of explanation rotating field theory course, belong to machine teaching field.
Background technology
Rotating magnetic field is the theoretical foundation of various alternating current generator, but its not visible property considerably increases the difficulty of understanding.In the teaching process of the course such as Electrical Motor, Electrical Machinery & Towage, instructors can only explain the origin cause of formation of rotating magnetic field by theory deduction, students also can only be understood by imagining, the understanding lacking image intuitively makes rotating field theory be the difficult point that students learns always.The best approach addressed this problem adopts rotating magnetic field demonstrator to carry out aided education, and students can rotated in visible magnetic field.In existing apparatus for demonstrating, have plenty of the stator component utilizing an induction motor, pass into power frequency three-phase alternating current and produce rotating magnetic field; Be more utilize the method for phase shift that single phase industrial frequence alternating current is transformed into three-phase alternating current, then pass into three-phase windings, form rotating magnetic field.Adopt 50Hz power frequency electric as the disadvantage of power supply to be, even 8 pole motors (general induction motor is all 4 poles), the synchronous rotational speed of rotating magnetic field also up to 750r/min, i.e. 12.5r/
s, naked eyes cannot be seen clearly at all.
So existing rotating magnetic field demonstrator all can not meet intuitively, lively, these requirements of image, not preferred plan.
Summary of the invention
The present invention seeks to can not to meet intuitively to solve existing rotating magnetic field demonstrator, lively, these problems required of image, provide a kind of rotating magnetic field imagery dynamic demonstration device adopting Non-follow control.
The rotating magnetic field imagery dynamic demonstration device of employing Non-follow control of the present invention, it comprises handle, selsyn generator, synchronous phase-sensitive demodulating circuits and three-phase induction motor; Handle drives the rotor turns of selsyn generator, and the stator winding of selsyn generator exports three-phase alternating current electric signal; This three-phase alternating current electric signal processes by synchronous phase-sensitive demodulating circuits, removes its higher hamonic wave, only retains its envelope, three-phase symmetrical ac signal after output demodulation; After described demodulation, three-phase symmetrical ac signal passes in the stator winding of three-phase induction motor, exports the rotating magnetic field for demonstration by the rotor of three-phase induction motor.
Advantage of the present invention: the present invention, in conjunction with selsyn and synchronous phase sensitivity demodulation techniques, provides a kind of rotating magnetic field dynamic demonstration apparatus design that is novel, imagery.Operator controls the motion of rotating magnetic field by handle, makes synchronous rotational speed be no more than 3r/s, clearly can observe the relation between rotating magnetic field and each influence factor.The motion spatially Complete Synchronization of handle and rotating magnetic field, rotating magnetic field can along with handle rotating, and continuous rotation.There is clear and definite position corresponding relation, produce directly perceived, lively, vivid demonstrating effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the rotating magnetic field imagery dynamic demonstration device of employing Non-follow control of the present invention.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, adopts the rotating magnetic field imagery dynamic demonstration device of Non-follow control described in present embodiment, it comprises handle 1, selsyn generator 2, synchronous phase-sensitive demodulating circuits 3 and three-phase induction motor 4; Handle 1 drives the rotor turns of selsyn generator 2, and the stator winding of selsyn generator 2 exports three-phase alternating current electric signal; This three-phase alternating current electric signal processes by synchronous phase-sensitive demodulating circuits 3, removes its higher hamonic wave, only retains its envelope, three-phase symmetrical ac signal after output demodulation; After described demodulation, three-phase symmetrical ac signal passes in the stator winding of three-phase induction motor 4, exports the rotating magnetic field for demonstration by the rotor of three-phase induction motor 4.
Selsyn generator 2 is epitrochanterian small and special electric machine for field copper is arranged on.
Handle 1 rotates the rotor of a selsyn generator 2, makes its stator winding produce three-phase alternating current, is controlled the frequency of three-phase alternating current by the speed of handle 1.Selsyn generator 2 is a kind of small and special electric machines, and field copper is positioned on rotor.When the rotor is turning, its stator winding exports three-phase symmetrical electromotive force.Containing the higher hamonic wave identical with excitation voltage frequency in potential waveform, but envelope is the sine wave be directly proportional to rotor speed.
Be that reference signal forms data select signal with excitation voltage, selsyn generator 2 output potential signal inputs synchronous phase-sensitive demodulating circuits 2 as data-signal, and the output signal obtained is exactly the three-phase symmetric voltage signal that frequency is directly proportional to handle 1 rotating speed.The output signal of synchronous phase-sensitive demodulating circuits 2 pairs of selsyn generators processes, and removes its higher hamonic wave, and only retains its envelope.
Pass into three-phase symmetrical alternating current in the stator winding of three-phase induction motor 4, can circular rotating field be produced.Not loading on rotor, revolutional slip is minimum can be ignored, and its rotating speed can think synchronous rotational speed.Produce directly perceived, lively, vivid demonstrating effect.
Embodiment two: present embodiment is described further embodiment one, there is relational expression in the stator poles logarithm of three-phase induction motor 4 and selsyn generator 2: n
1=pn
Ω, wherein n
1for the stator poles logarithm of three-phase induction motor 4, n
Ωfor the stator poles logarithm of selsyn generator 2, p is the ratio of the stator poles logarithm of three-phase induction motor 4 and selsyn generator 2, p be more than or equal to 1 positive integer.
As p=1, synchronous rotational speed is identical with handle 1 rotating speed, the motion of the rotor of three-phase induction motor 4 and handle 1 synchronized movement.
Embodiment three: present embodiment provides a specific embodiment, selsyn generator 2 adopts the single-phase alternating current of 110V, 50Hz as excitatory, stator poles logarithm n
Ωbe 1.Data select signal using the square wave of 50Hz as synchronous phase-sensitive demodulating circuits 3, obtains the envelope of selsyn generator 2 output potential by numerical control analog switch.Three-phase induction motor 4 adopts the miniwatt three-phase induction motor of 250W, stator poles logarithm n
1also be 1.
This kind of embodiment ensure that rotating magnetic field synchronous rotational speed is identical with handle 1 rotating speed, that is, handle 1 turn of a few circle, rotating magnetic field just turns a few circle; 1 turn, handle how soon, and how soon rotating magnetic field just turns.Like this, a very clear simple and clear dynamic demonstration effect can just be obtained.
Claims (3)
1. adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control, it is characterized in that, it comprises handle (1), selsyn generator (2), synchronous phase-sensitive demodulating circuits (3) and three-phase induction motor (4); Handle (1) drives the rotor turns of selsyn generator (2), and the stator winding of selsyn generator (2) exports three-phase alternating current electric signal; This three-phase alternating current electric signal processes by synchronous phase-sensitive demodulating circuits (3), removes its higher hamonic wave, only retains its envelope, three-phase symmetrical ac signal after output demodulation; After described demodulation, three-phase symmetrical ac signal passes in the stator winding of three-phase induction motor (4), exports the rotating magnetic field for demonstration by the rotor of three-phase induction motor (4).
2. adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control according to claim 1, it is characterized in that, selsyn generator (2) is epitrochanterian small and special electric machine for field copper is arranged on.
3. adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control according to claim 1, it is characterized in that, there is relational expression in the stator poles logarithm of three-phase induction motor (4) and selsyn generator (2): n
1=pn
Ω, wherein n
1for the stator poles logarithm of three-phase induction motor (4), n
Ωfor the stator poles logarithm of selsyn generator (2), p is the ratio of the stator poles logarithm of three-phase induction motor (4) and selsyn generator (2), p be more than or equal to 1 positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510607307.2A CN105225585A (en) | 2015-09-22 | 2015-09-22 | Adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510607307.2A CN105225585A (en) | 2015-09-22 | 2015-09-22 | Adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105225585A true CN105225585A (en) | 2016-01-06 |
Family
ID=54994511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510607307.2A Pending CN105225585A (en) | 2015-09-22 | 2015-09-22 | Adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105225585A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869488A (en) * | 2016-06-07 | 2016-08-17 | 东北林业大学 | Running state demonstrator of crane main hook dragging motor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2092131U (en) * | 1991-04-05 | 1992-01-01 | 鲁满乐 | Three-phase motor demonstrator |
| CN2376028Y (en) * | 1999-04-24 | 2000-04-26 | 漯河广播电视大学 | Multi-functional electric machine principle teaching demonstrator |
| CN2636348Y (en) * | 2003-07-24 | 2004-08-25 | 邹城市技工学校 | Rotary magnetic field demonstrator for three-phase asynchronous motor |
| JP2006301551A (en) * | 2005-04-21 | 2006-11-02 | Hisao Nishida | Dc motor rotation principle explaning device |
| CN201117144Y (en) * | 2007-08-10 | 2008-09-17 | 徐州工程学院 | Three-phase AC asynchronous motor rotation magnetic field display instrument |
| CN201145980Y (en) * | 2008-01-11 | 2008-11-05 | 朱英明 | Instrument for demonstrating asynchronous motor rotating magnetic field |
| CN201804483U (en) * | 2010-08-22 | 2011-04-20 | 董传刚 | Rotating magnetic field demonstrator |
| CN104835395A (en) * | 2015-04-30 | 2015-08-12 | 合肥通用机械研究院 | Rotating magnetic field demonstration instrument |
-
2015
- 2015-09-22 CN CN201510607307.2A patent/CN105225585A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2092131U (en) * | 1991-04-05 | 1992-01-01 | 鲁满乐 | Three-phase motor demonstrator |
| CN2376028Y (en) * | 1999-04-24 | 2000-04-26 | 漯河广播电视大学 | Multi-functional electric machine principle teaching demonstrator |
| CN2636348Y (en) * | 2003-07-24 | 2004-08-25 | 邹城市技工学校 | Rotary magnetic field demonstrator for three-phase asynchronous motor |
| JP2006301551A (en) * | 2005-04-21 | 2006-11-02 | Hisao Nishida | Dc motor rotation principle explaning device |
| CN201117144Y (en) * | 2007-08-10 | 2008-09-17 | 徐州工程学院 | Three-phase AC asynchronous motor rotation magnetic field display instrument |
| CN201145980Y (en) * | 2008-01-11 | 2008-11-05 | 朱英明 | Instrument for demonstrating asynchronous motor rotating magnetic field |
| CN201804483U (en) * | 2010-08-22 | 2011-04-20 | 董传刚 | Rotating magnetic field demonstrator |
| CN104835395A (en) * | 2015-04-30 | 2015-08-12 | 合肥通用机械研究院 | Rotating magnetic field demonstration instrument |
Non-Patent Citations (1)
| Title |
|---|
| 李勇；王益龙；李社伟；杜开荣；陆永平: "应用于角度随动系统的同步相敏解调电路", 《微特电机》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869488A (en) * | 2016-06-07 | 2016-08-17 | 东北林业大学 | Running state demonstrator of crane main hook dragging motor |
| CN105869488B (en) * | 2016-06-07 | 2018-05-11 | 东北林业大学 | Lifting owner hooks dragging motor operating status demonstrator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hindmarsh | Electrical machines & their applications | |
| Karandey et al. | Research of change of parameters of a magnetic flux of the stator and rotor of special electric drives | |
| CN103647484B (en) | Full-speed position-less sensor control method for aviation starting power generation system | |
| CN107633752B (en) | Motor teaching model | |
| CN104660120B (en) | A kind of motor zero testing method and device | |
| CN203966412U (en) | A kind of double current generator principle best explain teaching apparatus | |
| CN206411982U (en) | Alternating current generator demonstration device and alternating current generator apparatus for demonstrating | |
| CN203838932U (en) | Transparent electromotor teaching model | |
| MY172508A (en) | Power generation unit, and motor generator control method | |
| EP2879280A1 (en) | Electric machine | |
| CN105225585A (en) | Adopt the rotating magnetic field imagery dynamic demonstration device of Non-follow control | |
| CN106059414B (en) | The drive dynamic control device of instrument | |
| CN202838781U (en) | Direct-current motor presentation device | |
| Yong et al. | Design and realization of a novel visual educating device for rotating magnetic fields | |
| CN102694497A (en) | Wind driven generator torque control method and wind driven generator control system | |
| TW201721612A (en) | Educational two-phase motor model | |
| CN202145357U (en) | Rotating magnetic pole type AC generator used for teaching | |
| CN204086484U (en) | A kind of motor driver load equivalent analogue means based on rotary transformer | |
| CN204615521U (en) | Variable rated power motor | |
| CN206594916U (en) | Three phase electric machine operation principle teaching machine | |
| Rosic et al. | Slip compensation of U/F controlled induction machine through educational laboratory setup | |
| CN107798971A (en) | A kind of magnetomotive demonstrator | |
| CN106787478A (en) | Based on second section away from unicast winding permanent magnet direct current motor brush localization method | |
| Shen et al. | Design of Experimental Apparatus for Asynchronous Motor Principle | |
| Miroslav et al. | Remote experiments: Step motor control and magnetic field visualization of induction machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160106 |