CN209525401U - A kind of frequency converter excitation overload detection system - Google Patents
A kind of frequency converter excitation overload detection system Download PDFInfo
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- CN209525401U CN209525401U CN201822120330.0U CN201822120330U CN209525401U CN 209525401 U CN209525401 U CN 209525401U CN 201822120330 U CN201822120330 U CN 201822120330U CN 209525401 U CN209525401 U CN 209525401U
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- excitation
- frequency converter
- load
- detection system
- overload detection
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Abstract
The utility model discloses a kind of frequency converter excitation overload detection systems, including the controller for setup parameter, display information and communicate to connect target frequency converter on it and PLC module, power supply and the load of its promising power supply are connected on the target frequency converter, excitation group is connected in the load, excitation voltage source is connected in the excitation group, relay is connected in the PLC module, the relay is between excitation group and excitation voltage source.It can carry out overload self-protection function detection to frequency converter automatically, and simple and reliable for structure, detection efficiency is high, at low cost.
Description
Technical field
The utility model relates to detection systems, and in particular to a kind of frequency converter excitation overload detection system.
Background technique
Frequency converter (Variable-frequency Drive, VFD) be by change motor frequency mode of working power supply come
Control the electric control appliance of ac motor.Frequency converter after production is completed, needs to carry out its electric current and busbar voltage
Calibration.Because frequency converter can encounter various emergency situations during use, the appearance of this situation will cause electric current
Fluctuate widely.So frequency converter after completing correcting current, will carry out the detection of overload protection function, to it also with true
Protect frequency converter emergency situations appearance after can and alarm and cutting output, avoid damage further expansion.
Existing frequency converter overload detection usually carries out excitation to load manually, the electric current loaded with instantaneous increase.Excitation
It is exactly to provide operating fields to the electrical equipment to work using electromagnetic induction principle.The method is completed based on electric current manual calibration
Manual excitation carries out overload measurement later, needs personnel to walk up and down wiring and either on or off excitation, inefficiency.And
It is required that personnel have certain understanding to frequency converter and load, it is desirable that higher.And because of many kinds of, the Ren Yuan of frequency converter and load
It is easy to error when remembering parameter and setup parameter, so that testing result is become unreliable, influences product quality.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of frequency converter excitation overload detection systems, can be automatic
Overload self-protection function detection is carried out to frequency converter, simple and reliable for structure, detection efficiency is high, at low cost.
In order to solve the above-mentioned technical problem, the utility model provides a kind of frequency converter excitation overload detection system, including
For setup parameter, shows the controller of information and communicate to connect target frequency converter on it and PLC module, the target
Power supply and the load of its promising power supply are connected on frequency converter, are connected with excitation group in the load, are connected in the excitation group
Excitation voltage source is connected with relay in the PLC module, and the relay is between excitation group and excitation voltage source.
Preferably, the load, excitation group and relay have multiple groups, all relays are both connected to PLC mould
On block.
Preferably, the communication pattern between the target frequency converter and controller is RS485 communication.
Preferably, the communication pattern between the PLC module and controller is RS485 communication.
Preferably, the load is motor.
Preferably, the power supply is the three-phase alternating current of 380V.
Preferably, the controller is touch panel.
Preferably, the excitation group is the excitation that the electric current of load can be increased to 1.5 times~2 times of primary current
Group.
Compared with prior art, the utility model has the beneficial effects that
1, the utility model can directly be set the running parameter of target frequency converter, be avoided by setting controller
Personnel go to remember a large amount of parameter according to different size, different working condition, are simple and efficient, it is not easy to malfunction, reduce to people
The requirement of member, it is at low cost.
2, the utility model can carry out excitation to load, to become to target by setting excitation group and excitation voltage source
Frequency device carries out the detection of overload self-protection function, simple and reliable.
3, the utility model is by setting PLC module and relay, can automatically control excitation group and excitation voltage source it
Between on-off, thus reach control whether to load carry out excitation, avoid personnel it is manually opened and close excitation wasted when
Between, production efficiency is improved, is reduced costs；In addition, the mode of this automatic magnetic exciting, is calibrated automatically for frequency converter, detects and mention
Having supplied may.
4, the utility model enables the controller to judge automatically by connecting target frequency converter, PLC module with controller
Whether target frequency converter self-protection function after excitation is perfect, high-efficient, very clear.
Detailed description of the invention
For the clearer technical solution illustrated in the utility model embodiment technology, embodiment technology will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments, for those of ordinary skill in the art, without creative efforts, additionally it is possible to according to
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clear, complete description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on this it is practical in embodiment, those of ordinary skill in the art are without creative labor
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment
Shown in referring to Fig.1, the utility model discloses a kind of frequency converter excitation overload detection systems, including controller, mesh
Mark frequency converter, load, PLC module and excitation group.
Above-mentioned target frequency converter communication connection is on the controller.Target frequency converter is the frequency conversion of pending overload detection
Device.Communication pattern between target frequency converter and controller can be RS485 communication.Target frequency converter is connected on power supply.Electricity
Source can be the three-phase alternating current of 380V.
Above-mentioned load is connected on target frequency converter.Target frequency converter can load dynamic according to the signal driving source of controller
Make.Load can be motor.
Above-mentioned excitation group is connected in load.Excitation voltage source is connected in excitation group.Excitation group can be in excitation voltage
Operating fields are provided for load under the driving in source, i.e. progress excitation.After excitation, the electric current of load can increase moment, to detect
The overload protection function of target frequency converter.Excitation group can be and the electric current of load can be increased to 1.5~2 times of primary current encourage
Magnetic group.
Above-mentioned PLC module communication connection is on the controller.Be connected with relay in PLC module, setting in excitation group and
Between excitation voltage source.PLC module can control the on-off of relay, to control whether to carry out excitation, and will send information to
On controller.Communication pattern between PLC module and controller can be RS485 communication.
Above controller can directly set the running parameter of target frequency converter and PLC module, change its working condition, and
Analyze and determine and show testing result.Controller can be touch panel, easy to operate, as a result very clear.
One preferred embodiment of the present embodiment is:
Above-mentioned load, excitation group and relay have multiple groups, and all relays are both connected in PLC module.It can be simultaneously
Or excitation overload detection is carried out to multiple target frequency converters in turn, further increase detection efficiency.
Working principle:
Personnel connect the target frequency converter that correcting current is completed on the controller, and controller, which issues target frequency converter, to be started
Instruction；Power supply gives target inverter supply, and target transducer drive source loads converting operation；Controller encourages PLC module sending
Magnetic instruction, PLC module issue signal to relay, and excitation voltage source and excitation group is connected in relay closure；It drives in excitation voltage source
Dynamic source excitation group carries out excitation to load, increases the electric current moment of load；Controller persistently obtains the work of target frequency converter
State, and judge whether it has carried out overload protection；Next target frequency converter is replaced after the completion of detection, is continued to test.
Current embodiment require that supplementary explanation: the utility model is made of the specific hardware configuration such as controller, part
Hardware has the participation of software program in the process of running, and the software program of auxiliary the machine operation is existing reproducible software journey
Sequence does not constitute the innovative point of the application.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with novel point.
Claims (8)
1. a kind of frequency converter excitation overload detection system, which is characterized in that including the controller for setup parameter, display information
And target frequency converter on it and PLC module are communicated to connect, the power supply of its promising power supply is connected on the target frequency converter
And load, excitation group is connected in the load, and excitation voltage source is connected in the excitation group, is connected in the PLC module
There is relay, the relay is between excitation group and excitation voltage source.
2. frequency converter excitation overload detection system as described in claim 1, which is characterized in that it is described load, excitation group and after
Electric appliance has multiple groups, and all relays are both connected in PLC module.
3. frequency converter excitation overload detection system as described in claim 1, which is characterized in that the target frequency converter and control
Communication pattern between device is RS485 communication.
4. frequency converter excitation overload detection system as described in claim 1, which is characterized in that the PLC module and controller
Between communication pattern be RS485 communication.
5. frequency converter excitation overload detection system as described in claim 1, which is characterized in that the load is motor.
6. frequency converter excitation overload detection system as described in claim 1, which is characterized in that the power supply is the three-phase of 380V
Alternating current.
7. frequency converter excitation overload detection system as described in claim 1, which is characterized in that the controller is touch surface
Plate.
8. frequency converter excitation overload detection system as described in claim 1, which is characterized in that the excitation group is that can will bear
The electric current of load increases to 1.5 times~2 times of primary current of excitation group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822120330.0U CN209525401U (en) | 2018-12-18 | 2018-12-18 | A kind of frequency converter excitation overload detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822120330.0U CN209525401U (en) | 2018-12-18 | 2018-12-18 | A kind of frequency converter excitation overload detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209525401U true CN209525401U (en) | 2019-10-22 |
Family
ID=68226705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822120330.0U Active CN209525401U (en) | 2018-12-18 | 2018-12-18 | A kind of frequency converter excitation overload detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209525401U (en) |
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2018
- 2018-12-18 CN CN201822120330.0U patent/CN209525401U/en active Active
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