CN214315099U - Motor brake detection protection system - Google Patents
Motor brake detection protection system Download PDFInfo
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- CN214315099U CN214315099U CN202120545050.3U CN202120545050U CN214315099U CN 214315099 U CN214315099 U CN 214315099U CN 202120545050 U CN202120545050 U CN 202120545050U CN 214315099 U CN214315099 U CN 214315099U
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- converter
- plc controller
- protection system
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Abstract
The utility model discloses a motor brake detects protection system, including PLC controller, brake contactor, converter, motor and motor brake, the signal input part of PLC controller is given the module electricity with the instruction and is connected, and converter, brake contactor are connected to the signal output part electricity respectively of PLC controller, the signal output part of converter is connected with the signal control end electricity of motor, brake contactor's signal output part is connected with the signal control end electricity of motor brake, the current detection module who is used for detecting motor operating current is still concatenated between converter and the motor, and the current detection module is connected with the signal input part electricity of PLC controller. The utility model discloses module simple structure both can detect whether motor brake normally works, can prevent again because motor torque is too big, produces the hard mill with the brake block, causes the brake block wearing and tearing, is favorable to prolonging the life of motor brake and motor itself.
Description
Technical Field
The utility model relates to a tower machine motor brake detects technical field, specifically is a motor brake detects protection system.
Background
At present, the frequency conversion control has a dominant position in the field of engineering machinery, and a control system of a frequency converter and a motor is visible everywhere. However, some variable frequency control systems have a significant and serious disadvantage. If the motor torque is too large, the motor can rotate even if the motor brake is not loosened, and the motor brake and the brake are subjected to hard grinding, so that the service life of the motor brake and the service life of the motor can be seriously shortened. How to normally detect motor brake work to protection motor brake and motor itself become the technical problem that this application needs to solve.
Disclosure of Invention
An object of the utility model is to provide a motor brake detects protection system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a motor brake detects protection system which characterized in that: including PLC controller, brake contactor, converter, motor and motor brake, the signal input part and the instruction of PLC controller give the module electricity and are connected, and converter, brake contactor are connected to the signal output part electricity respectively of PLC controller, the signal output part of converter and the signal control end electricity of motor are connected, the signal output part of brake contactor and the signal control end electricity of motor brake are connected, it has the current detection module that is used for detecting motor operating current still to concatenate between converter and the motor, and current detection module is connected with the signal input part electricity of PLC controller.
Preferably, the instruction giving module adopts a control handle, a control button or a touch display screen.
Preferably, the signal output end of the PLC is also electrically connected with an alarm module.
Preferably, the alarm module adopts an alarm three-color lamp and/or a voice player.
Preferably, the frequency converter is an England GD350-19 frequency converter.
Preferably, the brake contactor is a schneider type LC1D09 contactor.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses module simple structure both can detect whether motor brake normally works, can prevent again because motor torque is too big, produces the hard mill with the brake block, causes the brake block wearing and tearing, is favorable to prolonging the life of motor brake and motor itself.
Drawings
FIG. 1 is a connection block diagram of a motor brake detection protection system;
FIG. 2 is a control diagram of brake detection logic in a motor brake detection protection system;
FIG. 3 is a control diagram of brake protection logic in a motor brake detection protection system;
fig. 4 is a circuit diagram of a current detection module in a motor brake detection protection system.
In the figure: the system comprises a PLC (programmable logic controller), a frequency converter 2, a brake contactor 3, a motor 4, a motor brake 5, a current detection module 6, an alarm module 7 and an instruction giving module 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a technical solution: the utility model provides a motor brake detects protection system, includes PLC controller 1, brake contactor 3, converter 2, motor 4 and motor brake 5, PLC controller 1's signal input part gives module 8 electricity with the instruction and is connected, and converter 2, brake contactor 3 are connected to PLC controller 1's signal output part electricity respectively, converter 2's signal output part and motor 4's signal control end electricity are connected, brake contactor 3's signal output part and motor brake 5's signal control end electricity are connected, it has the current detection module 6 who is used for detecting motor 4 operating current still to concatenate between converter 2 and the motor 4, and current detection module 6 is connected with PLC controller 1's signal input part electricity.
The instruction giving module 8 may adopt a control handle, a control button or a touch display screen. The signal instruction of the forward rotation or the reverse rotation of the motor can be sent to the PLC controller 1 through a control handle, a control button or a touch display screen.
And the signal output end of the PLC 1 is also electrically connected with an alarm module 7. The alarm module 7 can adopt an alarm three-color lamp and/or a voice player. When the working current of the motor 4 is detected to be too large, the PLC 1 can control the alarm module to send out an alarm prompt, and workers can conveniently and timely handle faults.
The frequency converter is an England GD350-19 type frequency converter, and the torque upper limit value of the motor 4 during operation can be set through the frequency converter. The brake contactor adopts a Schneider LC1D09 type contactor.
In the embodiment, the detection of the motor brake 5 is realized by detecting the working current of the motor 4 through the current detection module 6. The working current of the motor 4 in normal no-load operation is far less than the rated current of the motor 4; when the motor 4 runs fully, the working current of the motor 4 can not exceed 120% of the rated current. When the motor brake 5 is not opened, namely when the motor brake 5 brakes the motor 4, the working current of the motor 4 in no-load operation is also larger than 130% of the rated current of the motor 4; when the motor 4 is in a braking state and continuously operates with a load, the maximum working current can reach more than 200% of the rated current. Therefore, the present embodiment detects whether the motor brake is released by collecting the operating current of the motor 4 and comparing the operating current with a preset alarm current value (which may be set to 130-150% of the rated current of the motor 4 according to actual conditions).
Since an excessive current may occasionally occur during normal use, for example, the current of the motor 4 may be large during starting and stopping, the detection system of the embodiment may increase the detection time value to reduce the possibility of malfunction. The protection system of the embodiment finds the critical torque of the motor 4 dragging the motor brake 5 through testing, and then sets the torque upper limit value of the motor 4 on the frequency converter 2 to limit the motor 4, so as to protect the motor 4 and the motor brake 5.
Operation control logic during brake detection: the control handle can send a signal instruction of forward rotation or reverse rotation of the motor to the PLC controller 1, the PLC controller 1 sends the signal instruction to the frequency converter 2 and the brake contactor 3, the brake contactor 3 is connected in an attracting mode, an electromagnetic coil in the motor brake 5 is controlled to adsorb a brake pad, the brake pad is separated from a brake disc on a rotating shaft of the motor 4, meanwhile, the frequency converter 2 outputs voltage to the motor 4, and the motor 4 starts to rotate;
the current detection module 6 collects the working current of the motor 4 during the running period, compares the working current with a preset alarm current value, and if the detected working current is smaller than the set alarm current value, the brake contactor 3 and the motor brake 5 are indicated to work normally, and the motor 4 is not braked at the moment;
if the detected working current is smaller than or equal to the set alarm current value, the current detection module 6 starts to perform detection timing, when the timing time is larger than the set detection time value, it is indicated that a fault occurs in the brake contactor 3 and/or the motor brake 5, and it is possible that the brake contactor 3 and/or the motor brake 5 is not electrified or a brake pad is stuck, the current detection module 6 at the moment stops outputting a signal to be sent to the PLC controller 1, the PLC controller 1 disconnects the operating signals of the brake contactor 3 and the frequency converter 2, and reports an overcurrent fault through the alarm module 7, so that the motor 4 and the motor brake 5 are protected.
The operation control logic during motor protection is as follows: the control handle can send a signal instruction of forward rotation or reverse rotation of the motor to the PLC controller 1, the PLC controller 1 sends the signal instruction to the frequency converter 2 and the brake contactor 3, the brake contactor 3 is connected in an attracting mode, an electromagnetic coil in the motor brake 5 is controlled to adsorb a brake pad, the brake pad is separated from a brake disc on a rotating shaft of the motor 4, meanwhile, the frequency converter 2 outputs voltage to the motor 4, and the motor 4 starts to rotate;
when the frequency converter 2 detects that the running torque of the motor 4 is greater than or equal to the preset torque upper limit value, the frequency converter 2 stops increasing the torque of the motor 4, and the motor brake 5 are prevented from being damaged due to overlarge running torque output by the motor 4; if the frequency converter 2 detects that the running torque of the motor 4 is smaller than the preset torque upper limit value, the motor 4 continues to work normally.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a motor brake detects protection system which characterized in that: including PLC controller (1), brake contactor (3), converter (2), motor (4) and motor brake (5), the signal input part of PLC controller (1) is given module (8) electricity with the instruction and is connected, and converter (2), brake contactor (3) are connected to the signal output part electricity respectively of PLC controller (1), the signal output part of converter (2) is connected with the signal control end electricity of motor (4), the signal output part of brake contactor (3) is connected with the signal control end electricity of motor brake (5), still concatenate current detection module (6) that are used for detecting motor (4) operating current between converter (2) and motor (4), current detection module (6) are connected with the signal input part electricity of PLC controller (1).
2. The motor brake detection protection system according to claim 1, wherein: the instruction giving module (8) adopts a control handle, a control button or a touch display screen.
3. The motor brake detection protection system according to claim 1, wherein: and the signal output end of the PLC (1) is also electrically connected with an alarm module (7).
4. The motor brake detection protection system of claim 3, wherein: the alarm module (7) adopts an alarm three-color lamp and/or a voice player.
5. The motor brake detection protection system according to claim 1, wherein: the frequency converter (2) adopts an England GD350-19 type frequency converter.
6. The motor brake detection protection system according to claim 1, wherein: the brake contactor (3) adopts a Schneider LC1D09 type contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120545050.3U CN214315099U (en) | 2021-03-16 | 2021-03-16 | Motor brake detection protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120545050.3U CN214315099U (en) | 2021-03-16 | 2021-03-16 | Motor brake detection protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214315099U true CN214315099U (en) | 2021-09-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120545050.3U Active CN214315099U (en) | 2021-03-16 | 2021-03-16 | Motor brake detection protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214315099U (en) |
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2021
- 2021-03-16 CN CN202120545050.3U patent/CN214315099U/en active Active
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