CN207691709U - A kind of Quick-speed braking arrangement for threephase asynchronous machine - Google Patents
A kind of Quick-speed braking arrangement for threephase asynchronous machine Download PDFInfo
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- CN207691709U CN207691709U CN201721459646.1U CN201721459646U CN207691709U CN 207691709 U CN207691709 U CN 207691709U CN 201721459646 U CN201721459646 U CN 201721459646U CN 207691709 U CN207691709 U CN 207691709U
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- brake
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- rectifier
- asynchronous machine
- threephase asynchronous
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Abstract
The utility model discloses a kind of Quick-speed braking arrangements for threephase asynchronous machine, it include power-off brake type electromagnetic brake brake, and the rectifier for converting alternating current to direct current, the output end of the rectifier connects power-off brake type electromagnetic brake brake, and provide direct-current working volts for it, further include having AC electromagnetic contactor, two input terminals of the AC electromagnetic contactor are separately connected wiring head end and the wiring end of any winding in threephase asynchronous machine, the output end of the AC electromagnetic contactor is connected with rectifier input, the combined floodgate minimum voltage of electromagnetic coil in the AC electromagnetic contactor is more than the inductance potential of winding when threephase asynchronous machine powers off.The utility model has the advantages that it is reasonable in design, at low cost and can realize fast break brake.
Description
Technical field
The utility model belongs to motor control technology field, in particular to a kind of fast braking for three-phase braking motor
Device.
Background technology
Also to be rotated for a period of time (or distance) by inertia after threephase asynchronous excision power supply can just stop, and
Often require that motor can quickly stop after a loss of power in production.In the prior art, generally use electromagnetic brake brake pair three
Phase asynchronous motor is braked.Its braking operation principle is as described in Figure 1, and in Fig. 1, FU is circuit three-phase break protector, SQ1
Motor switch, M are threephase asynchronous machines, and the input terminal of rectifier is separately connected the wiring head of any winding in threephase asynchronous machine
End and wiring end.From Fig. 1 circuits as can be seen that when SQ1 is disconnected, motor M stops, rectifier power-off, power-off brake type
Electromagnetic brake arrester close brakes, but due to there is winding to form inductance potential in motor, so after SQ1 is disconnected, motor
In also have potential to rectifier, rectifier be formed by diode halfwave rectifier, as long as voltage be more than 0.7V, will be connected, institute
It will be inputted from exchange side with the inductance potential of motor, DC side just has voltage output, and rectifier is caused to also have out-put supply, from
And lead to brake brake not in time, it is brought a great deal of trouble to user.
For such case, user will do external control circuit and control brake to control rectifier, thus give
Client increases use cost and brings using trouble, it is therefore necessary to is improved to this.
Utility model content
The purpose of the utility model is to overcome the disadvantages existing in the prior art and insufficient, and provides a kind of structure design
Rationally, the Quick-speed braking arrangement for threephase asynchronous machine that is at low cost and can realizing fast break braking.
To achieve the above object, the technical solution of the utility model be include power-off brake type electromagnetic brake brake,
And the rectifier for converting alternating current to direct current, the output end of the rectifier connect power-off brake type electromagnetic brake system
Dynamic device, and direct-current working volts are provided for it, further include having AC electromagnetic contactor, two inputs of the AC electromagnetic contactor
End is separately connected wiring head end and the wiring end of any winding in threephase asynchronous machine, the output end of the AC electromagnetic contactor
It inputs and connects with rectifier, the combined floodgate minimum voltage of the electromagnetic coil in the AC electromagnetic contactor is disconnected more than threephase asynchronous machine
The inductance potential of winding when electric.
It is 150V that further setting, which is the combined floodgate minimum voltage of the electromagnetic coil in AC electromagnetic contactor,.
Further setting is the AC electromagnetic contactor and rectifier integrated setting.
The operation principle of the utility model is that the coil voltage of contactor is 220V, due to the electricity of the coil KM of contactor
Pressure only could allow the switch KM1 of contactor to be attracted more than 150V, so when SQ1 is disconnected, the inductance potential in motor is insufficient
To allow the switch KM1 of contactor to be attracted, so the switch KM1 of contactor disconnects no power, rectifier does not have power supply, power-off system
The ejector half electromagnetic brake brake also just brake in time of power-off in time, from without the case where being delayed of braking.
The utility model has the advantages that：
1. the timely power-off of contactor, it is ensured that rectifier powers off in time, to realize the fast break brake of brake；
2. pair needing the client that motor promptly and accurately brakes, external control circuit is eliminated, use cost is reduced；
3. AC electromagnetic contactor and conventional rectifier are made of one, a new rectifier, compact, visitor are formed
It is replaced easy for installation without increasing installation space at family.
The utility model is described further with specific implementation mode with reference to the accompanying drawings of the specification.
Description of the drawings
The braking principle figure of Fig. 1 conventional three-phase asynchronous machines；
Fig. 2 the utility model is applied to the braking principle figure of threephase asynchronous machine.
Fig. 3 power-off brake type electromagnetic brake brake schematic diagrams.
Specific implementation mode
The utility model is specifically described below by embodiment, is served only for carrying out the utility model further
Illustrate, should not be understood as the restriction to scope of protection of the utility model.
Specific embodiment of the present utility model as Figure 2-3 includes power-off brake type electromagnetic brake brake
1, and the rectifier 2 for converting alternating current to direct current, the output end connection power-off brake type electromagnetism armful of the rectifier 2
Lock brake 1, and direct-current working volts are provided for it, further include having AC electromagnetic contactor 3.The three-phase of threephase asynchronous machine is fixed
All there are two draw the end of a thread per phase winding for sub- winding.One is called head end, and other end is end.Provide that the first phase winding head end is used
D1 indicates that end is indicated with D4；Second phase winding head end indicates that end is indicated with D5 with D2；Distinguish at third phase winding first and last end
It is indicated with D3 and D6.It draws the end of a thread for this six to introduce on the binding post of terminal box, binding post correspondingly marks the mark of D1~D6
Note, described in Fig. 1, wherein three-phase electricity is respectively connected to D1, D2 and D3.Two of the present embodiment AC electromagnetic contactor 3 are defeated
Enter wiring head end D3 and wiring end D6 that end is separately connected any winding in threephase asynchronous machine.Therefore, wiring head end D3 and
Voltage between the D6 of wiring end is 220V alternating currents.
In addition, the output end of the present embodiment AC electromagnetic contactor 3 is connected with the input of rectifier 2, which connects
The combined floodgate minimum voltage of electromagnetic coil in tentaculum 3 is more than the inductance potential of winding when threephase asynchronous machine powers off.I.e. three is different
Step motor power-off when winding inductance potential cannot drive the electromagnetic coil of AC electromagnetic contactor 3 generate enough electromagnetic forces into
Row closes a floodgate.To which rectifier 2 can not obtain input voltage and power-off brake type electromagnetic brake brake 1 is made to lose electric power and supply
It answers and braking operation.The combined floodgate minimum voltage of electromagnetic coil preferably in AC electromagnetic contactor is 150V.In addition, this implementation
AC electromagnetic contactor 3 described in example and 2 integrated setting of rectifier, such as the functional component of the two is integrated into a unification
Box body or supporting plate on.
In addition, in the present embodiment Fig. 2, FU：Three-phase break protector, SQ1：Motor switch, KM：AC electromagnetic contactor
Electromagnetic coil, KM1：The switch of contactor, M：Threephase asynchronous machine.
AC electromagnetic contactor 3 is the conventional fitment of this field, can be directly from market purchasing application.Described in Fig. 3, figure
In 3,11 be spring, and 12 be armature, and 13 be coil, 14 is iron core, 15 is brake wheel, 16 is brake shoe, 17 is lever, work is former
Reason is, coil obtains electricity condition, and the pulling force of electromagnetic force and spring 11 keeps balancing, and brake shoe 16 is separated with brake wheel 15, and when powering off,
Electromagnetic force disappears, and lever 17 leads brake shoe 16 and embraces brake wheel 15 under the action of the spring, and to be braked, power-off brake type electromagnetism is embraced
Lock brake 1 is the conventional fitment of this field, can be directly from market purchasing application.The present embodiment is no longer described in detail.
Claims (3)
1. a kind of Quick-speed braking arrangement for threephase asynchronous machine includes power-off brake type electromagnetic brake brake, and
Rectifier for converting alternating current to direct current, the output end connection power-off brake type electromagnetic brake braking of the rectifier
Device, and provide direct-current working volts for it, it is characterised in that：Further include having AC electromagnetic contactor, the AC electromagnetic contactor
Two input terminals be separately connected wiring head end and the wiring end of any winding in threephase asynchronous machine, alternating electromagnetic contact
The output end of device is connected with rectifier input, and the combined floodgate minimum voltage of the electromagnetic coil in the AC electromagnetic contactor is more than three-phase
The inductance potential of winding when asynchronous machine powers off.
2. Quick-speed braking arrangement according to claim 1, it is characterised in that：Electromagnetic coil in AC electromagnetic contactor
Combined floodgate minimum voltage is 150V.
3. Quick-speed braking arrangement according to claim 1, it is characterised in that：The AC electromagnetic contactor and rectifier
Integrated setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721459646.1U CN207691709U (en) | 2017-11-05 | 2017-11-05 | A kind of Quick-speed braking arrangement for threephase asynchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721459646.1U CN207691709U (en) | 2017-11-05 | 2017-11-05 | A kind of Quick-speed braking arrangement for threephase asynchronous machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207691709U true CN207691709U (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721459646.1U Active CN207691709U (en) | 2017-11-05 | 2017-11-05 | A kind of Quick-speed braking arrangement for threephase asynchronous machine |
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| CN (1) | CN207691709U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888111A (en) * | 2017-11-05 | 2018-04-06 | 台州市宙义机电有限公司 | A kind of Quick-speed braking arrangement for threephase asynchronous machine |
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2017
- 2017-11-05 CN CN201721459646.1U patent/CN207691709U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888111A (en) * | 2017-11-05 | 2018-04-06 | 台州市宙义机电有限公司 | A kind of Quick-speed braking arrangement for threephase asynchronous machine |
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