CN104992599A - AC motor dynamic braking experimental board - Google Patents
AC motor dynamic braking experimental board Download PDFInfo
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- CN104992599A CN104992599A CN201510442281.0A CN201510442281A CN104992599A CN 104992599 A CN104992599 A CN 104992599A CN 201510442281 A CN201510442281 A CN 201510442281A CN 104992599 A CN104992599 A CN 104992599A
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- motor
- dynamic braking
- brassboard
- contactor
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- 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
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- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Algebra (AREA)
- Power Engineering (AREA)
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- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
The invention discloses an AC motor dynamic braking experimental board, which comprises a fuse, a contactor KM1, a contactor KM2, a transformer rectifier circuit, a thermal relay, a time relay, a button, a terminal row, a power supply and a motor, wherein the fuse, the contactors, the transformer rectifier circuit, the thermal relay, the time relay, the button and the terminal row are fixed on an experimental substrate via a fixing device to form an experimental board; the power supply is a three-phase AC power supply and is connected with the terminal row via a wire; the motor is a three-phase asynchronous AC motor, and the winding of each phase is connected with the terminal row via the wire; and due to the experimental board, dynamic braking stopping control by the asynchronous AC motor with time as the principle can be realized. The experimental board has the advantages of low cost, wide use, flexible use and the like.
Description
Technical field
The present invention relates to the technical field such as low-voltage electrical apparatus, electrical control, particularly a kind of alternating current generator dynamic braking brassboard.
Background technology
Threephase asynchronous running status is divided into motoring condition and on-position, and when running on motoring condition, electromagnetic torque is identical with the direction of rotating speed, is to drive character.When running on on-position, the direction of electromagnetic torque and rotating speed is contrary, and be retarding torque, braking can make motor stop fast, or make potential energy loading high (as weight transferred by crane, means of transport is when descending runs) obtain stable decline rate.The braking method of asynchronous motor has mechanical braking and electric braking.Mechanical braking utilizes plant equipment (as electromagnetic brake) after electric motor circuit breaking, makes the rapid stall of motor.Electric braking is the principle braking utilizing electromagnetic torque contrary with rotary speed direction, and conventional braking method has reversing braking and dynamic braking.
Dynamic braking is exactly after motor departs from three-phase supply, stator winding adds a DC voltage, pass into DC current, stator winding produces a constant magnetic field, rotor cuts this constant magnetic field because inertia continues to rotate, in rotor conductor, just produce induction electromotive force and induction current.Dynamic braking has a lot of actual application at industrial automation, so many colleges and universities Teaching of Automation Course, various work of examining is investigated, and often it can be used as training and one of essential project of taking an examination.If be asynchronous motor dynamic braking specialized designs brassboard, circuit design and assembled in situ training carried out to student, then student can be helped to understand electric control theory and lifting operation level of skill.
Summary of the invention
For the deficiencies in the prior art, invent a kind of alternating current generator dynamic braking brassboard, as the electrical control property put into practice teaching and training plate, also can be used as maintenance electrician and investigate examination plate.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of alternating current generator dynamic braking brassboard, it comprises: fuse, contactor KM1, contactor KM2, Transformer Rectifier circuit, electrothermal relay, the time relay, button, terminal block, power supply, motor; Described fuse, described contactor, described Transformer Rectifier circuit, described electrothermal relay, the described time relay, described button, described terminal block, be fixed on an experimental substrate by stationary installation, forms brassboard.
Preferably, described power supply is three-phase alternating-current supply, and it is connected by wire with described terminal block; Described motor is phase asynchronous AC motor, and its every phase winding is connected with described terminal block by wire
Preferably, brassboard can realize the dynamic braking parking toll that asynchronous ac motor take time as principle.
Technique scheme has following beneficial effect: it is low that this brassboard has cost, and purposes is wide, uses the advantages such as flexible.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural representation.
Fig. 2 is embodiment of the present invention electrical schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, a kind of alternating current generator dynamic braking brassboard, it comprises: 1 fuse, 2 contactor KM1,3 contactor KM2,4 Transformer Rectifier circuit, 5 electrothermal relays, 6 time relays, 7 buttons, 8 terminal block, 9 power supplys, 10 motor.Described fuse, described contactor, described Transformer Rectifier circuit, described electrothermal relay, the described time relay, described button, described terminal block, be fixed on an experimental substrate by stationary installation, forms brassboard.Described power supply is three-phase alternating-current supply, and it is connected by wire with described terminal block; Described motor is phase asynchronous AC motor, and its every phase winding is connected with described terminal block by wire; Brassboard can realize the dynamic braking parking toll that asynchronous ac motor take time as principle.It is low that this brassboard has cost, and purposes is wide, uses the advantages such as flexible.
As shown in Figure 2, it is three-phase alternating-current supply that dynamic braking controls main circuit power, and through switch, fuse, contactor KM1 main contacts, electrothermal relay thermal element is connected to motor three-phase windings input end.When the main contacts adhesive of KM1 contactor, motor electric operation.When motor needs Brake stop, KM1 contactor coil dead electricity, KM1 main contacts disconnects, KM2 contactor coil obtains electric, the adhesive of KM2 main contacts, the two-phase in three-phase alternating-current supply, direct current is formed after transformer and bridge rectifier circuit transformation and rectification, two phase windings of access asynchronous motor, produce stationary magnetic field, asynchronous motor works in dynamic braking state.
As shown in Figure 2, from analysis of main circuit, during the adhesive of KM1 contactor, motor works in motoring condition, as when parking, requires KM1 coil losing electricity, KM2 coil obtains electric, machine operation in dynamic braking state, because system adopts time principle to control dynamic braking process, so need to carry out timing when KM2 coil obtains electric, when timing then cuts off KM2 coil power supply loop, dynamic braking process terminates.
As shown in Figure 2, SB1 normally closed contact, SB2 normally opened contact, KM1 assists normally opened contact, and KM1 coil forms asynchronous motor switching on/off circuit, due to KM1 and KM2 can not simultaneously electric, so KM1 and KM2 will arrange electrical interlocks.When stop button SB1 presses, cut off KM1 coil power supply branch road on the one hand, the KM2 of self-locking simultaneously coil power supply branch road, asynchronous motor works in dynamic braking state.On-delay type time relay KT starts timing, and when timing arrives, the normally closed delayed contact of the KT time relay disconnects, and cut off KM2 coil power supply branch road, dynamic braking process terminates.
Brassboard is directly installed components and parts, does not have encapsulation and integration, both reduces experimental cost, is conducive to again student and understands circuit working principle better.Brassboard simulates Industry Control scene completely, and needs student manually to complete assembly manipulation, is conducive to the operative skill level improving student.Brassboard controls except real training and textual criticism except completing asynchronous motor dynamic braking, and can also realize the training of the circuit such as point operation control, unidirectional operation, rotating control, purposes is very extensive.
Above a kind of alternating current generator dynamic braking brassboard that the embodiment of the present invention provides is described in detail; for one of ordinary skill in the art; according to the thought of the embodiment of the present invention; all will change in specific embodiments and applications; in sum; this description should not be construed as the restriction to invention, and all any changes made according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (3)
1. an alternating current generator dynamic braking brassboard, it comprises: fuse, contactor KM1, contactor KM2, Transformer Rectifier circuit, electrothermal relay, the time relay, button, terminal block, power supply, motor; Described fuse, described contactor, described Transformer Rectifier circuit, described electrothermal relay, the described time relay, described button, described terminal block, be fixed on an experimental substrate by stationary installation, forms brassboard.
2. a kind of alternating current generator dynamic braking brassboard according to claim 1, it is characterized in that, described power supply is three-phase alternating-current supply, and it is connected by wire with described terminal block; Described motor is phase asynchronous AC motor, and its every phase winding is connected with described terminal block by wire.
3. a kind of alternating current generator dynamic braking brassboard according to claim 1, is characterized in that, brassboard can realize the dynamic braking parking toll that asynchronous ac motor take time as principle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510442281.0A CN104992599A (en) | 2015-07-24 | 2015-07-24 | AC motor dynamic braking experimental board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510442281.0A CN104992599A (en) | 2015-07-24 | 2015-07-24 | AC motor dynamic braking experimental board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104992599A true CN104992599A (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510442281.0A Pending CN104992599A (en) | 2015-07-24 | 2015-07-24 | AC motor dynamic braking experimental board |
Country Status (1)
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| CN (1) | CN104992599A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776026A (en) * | 2016-05-09 | 2016-07-20 | 李堂兴 | Electromagnetic braking control circuit |
| CN110011590A (en) * | 2019-04-29 | 2019-07-12 | 青岛中加特变频电机有限公司 | Single-phase asynchronous motor and its braking system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03241389A (en) * | 1990-02-20 | 1991-10-28 | Hideo Koushiyuu | Separate color generator of three-phase ac and rotating magnetic field for educational purpose |
| CN202258088U (en) * | 2011-08-19 | 2012-05-30 | 郑州万特电气有限公司 | Motor star-delta and self-locking control practical training module |
| CN104064090A (en) * | 2014-07-02 | 2014-09-24 | 黄克亚 | Motor star-delta starting control experiment board |
| CN104392648A (en) * | 2014-12-18 | 2015-03-04 | 陈畅 | Experimental board for two-speed control of asynchronous motor |
| CN204406847U (en) * | 2015-02-10 | 2015-06-17 | 山东星科智能科技股份有限公司 | A kind of three-phase alternating current experiment module |
-
2015
- 2015-07-24 CN CN201510442281.0A patent/CN104992599A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03241389A (en) * | 1990-02-20 | 1991-10-28 | Hideo Koushiyuu | Separate color generator of three-phase ac and rotating magnetic field for educational purpose |
| CN202258088U (en) * | 2011-08-19 | 2012-05-30 | 郑州万特电气有限公司 | Motor star-delta and self-locking control practical training module |
| CN104064090A (en) * | 2014-07-02 | 2014-09-24 | 黄克亚 | Motor star-delta starting control experiment board |
| CN104392648A (en) * | 2014-12-18 | 2015-03-04 | 陈畅 | Experimental board for two-speed control of asynchronous motor |
| CN204406847U (en) * | 2015-02-10 | 2015-06-17 | 山东星科智能科技股份有限公司 | A kind of three-phase alternating current experiment module |
Non-Patent Citations (2)
| Title |
|---|
| 王振民: "《三相异步电动机的制动》", 30 September 1992 * |
| 王晓秋: "《三相异步电机的新型能耗制动研究》", 《世界科技研究与发展》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776026A (en) * | 2016-05-09 | 2016-07-20 | 李堂兴 | Electromagnetic braking control circuit |
| CN110011590A (en) * | 2019-04-29 | 2019-07-12 | 青岛中加特变频电机有限公司 | Single-phase asynchronous motor and its braking system |
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Application publication date: 20151021 |
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