CN108683383A - A kind of frequency conversion failure cutting frequency control circuit - Google Patents
A kind of frequency conversion failure cutting frequency control circuit Download PDFInfo
- Publication number
- CN108683383A CN108683383A CN201810671875.2A CN201810671875A CN108683383A CN 108683383 A CN108683383 A CN 108683383A CN 201810671875 A CN201810671875 A CN 201810671875A CN 108683383 A CN108683383 A CN 108683383A
- Authority
- CN
- China
- Prior art keywords
- frequency
- control loop
- conversion failure
- frequency conversion
- relay
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
Abstract
The present invention relates to a kind of frequency conversion failure cutting frequency control circuits, including variable frequency starting control loop and power frequency startup control loop, string is equipped with power frequency startup control switch in the power frequency startup control loop, further include frequency conversion failure cutting frequency control loop, is gone here and there in the frequency conversion failure cutting frequency control loop and be equipped with frequency conversion failure output switch and input relay coil；The input relay coil both ends are parallel with subsidiary control loop, and string is equipped with the normally opened contact and intermediate relay coil for putting into relay on the subsidiary control loop；The both ends of the power frequency startup control switch are parallel with the normally opened contact of intermediate relay；String is equipped with the normally-closed contact of input relay in the variable frequency starting control loop.The present invention is realized in frequency conversion failure, starts power frequency startup control loop.The circuit design is simple and practical, easy to operation, meets actual engineering demand, has wider application range.
Description
Technical field
The invention belongs to switchgear distribution control technology fields, and in particular to a kind of frequency conversion failure cutting frequency control circuit.
Background technology
The equipment that motor is converted as electromechanical energy has key effect, is answered extensively in industrial circle in the power system
With.To meet the applicable cases and demand of various complexity, different electric control circuits is needed to ensure that motor is normally transported safely
Row ensures to realize various control purpose.
In Practical Project control, many motors need to cut in frequency conversion failure such as the air blower of boiler and air-introduced machine
It shifts to power frequency operation, how control more comprehensively and effectively to be carried out to frequency conversion switching power frequency and also become one to have to consider
Problem.If motor cannot be switched to power frequency pattern under variable frequency work pattern, it is likely that cause motor to burn out, cause motor event
Barrier.
Invention content
The purpose of the present invention is to provide a kind of frequency conversion failure cutting frequency control circuits, easy in frequency conversion failure to solve
The problem of causing electrical fault.
In order to solve the above technical problems, the technical scheme is that：
The present invention provides a kind of frequency conversion failure cutting frequency control circuits, including variable frequency starting control loop and power frequency startup
Control loop, string is equipped with power frequency startup control switch in the power frequency startup control loop, further includes that frequency conversion failure cutting frequency is controlled
Circuit processed, string is equipped with frequency conversion failure output switch and input relay coil in the frequency conversion failure cutting frequency control loop；Institute
It states input relay coil both ends and is parallel with subsidiary control loop, string is equipped with the normal of input relay on the subsidiary control loop
Open contact and intermediate relay coil；The both ends of the power frequency startup control switch are parallel with the normally opened contact of intermediate relay；
String is equipped with the normally-closed contact of input relay in the variable frequency starting control loop.
Beneficial effects of the present invention：
The frequency conversion failure cutting frequency control circuit of the present invention, industrial frequency control is cut by adding frequency conversion failure in control loop
Circuit, by the input relay and intermediate relay cooperating to being arranged in frequency conversion failure cutting frequency control loop, with reality
When present frequency conversion failure, start power frequency startup control loop.The circuit design is simple and practical, easy to operation, meets actual work
Journey demand has wider application range.
As being further improved for circuit, the input relay is the time relay.
As being further improved for circuit, the normally opened contact of the time relay closes for the on-delay of the time relay
Close normally opened contact.
As being further improved for circuit, also string is equipped with input and exits control switch on the subsidiary control loop.
Description of the drawings
Fig. 1 is the frequency conversion failure cutting frequency control circuit figure of the present invention.
Specific implementation mode
To keep the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, to the present invention
It is described in further detail.
The frequency conversion failure cutting frequency control circuit of the present invention, including variable frequency starting control loop, power frequency startup control loop
With frequency conversion failure cutting frequency control loop.
In order to realize frequency of changing a job in frequency conversion failure, it is defeated to be equipped with frequency conversion failure for string in frequency conversion failure cutting frequency control loop
Go out switch and input relay coil, is also parallel with subsidiary control loop at the both ends of input relay coil, auxiliary control
Normally opened contact, intermediate relay coil and input of the string equipped with input relay exit control switch on circuit.
Meanwhile string sets the normally-closed contact of an input relay in variable frequency starting control loop.
String is equipped with power frequency startup control switch in power frequency startup control loop, and the both ends of switch are controlled simultaneously in power frequency startup
Join the normally opened contact of an intermediate relay.
It is described based on foregoing circuit, its working principle is that：
When input exits control switch and is placed in input position, after frequency converter failure, frequency converter exports fault-signal, frequency conversion
Failure output switch is closed, so that input relay coil electrification.At this point, input in variable frequency starting control loop after
The normally-closed contact of electric appliance disconnects so that variable frequency starting control loop disconnects, motor no longer variable frequency work；Meanwhile auxiliary controls back
The normally opened contact of input relay in road is closed, and intermediate relay coil electrification, power frequency startup controls the centre of switch ends
The normally opened contact of relay is closed so that power frequency startup control loop is connected, and starts power frequency startup control loop.
Input exit control switch be placed in exit position when, after frequency converter failure, frequency converter exports fault-signal, frequency conversion
Failure output switch is closed, so that input relay coil electrification.At this point, input in variable frequency starting control loop after
The normally-closed contact of electric appliance disconnects so that variable frequency starting control loop disconnects, motor no longer variable frequency work.But since input is moved back
Go out to control switch to be placed in and exit position, subsidiary control loop is no longer turned on, and intermediate relay coil can not charge, and will not be passed through again
Intermediate relay starts power frequency startup control loop, and motor also can not power frequency operation.
Foregoing circuit is carried out specifically applied to frequency conversion failure cutting frequency control circuit as shown in Figure 1.Such as Fig. 1
Shown, variable frequency starting control loop, power frequency startup control loop and the frequency conversion failure cutting frequency control loop being arranged in parallel connect
Between meeting breaker end of incoming cables A and N rows, this three control loops are three control loops successively from top to bottom in Fig. 1；And
And string is equipped with fuse FU on the A of breaker end of incoming cables, to carry out overcurrent protection to the control loop.
In Fig. 1, the system that variable frequency starting control loop and power frequency startup control loop form an interlocked control.Example
Such as, it is needed under variable frequency work pattern in motor, coil KM1 electrifications, the normally opened contact of coil KM1 is closed, motor frequency conversion mould
It working under formula, the normally-closed contact of the coil KM1 in power frequency startup control loop disconnects, and power frequency startup control loop disconnects,
Motor can not work under power frequency pattern；It is needed under power frequency operating mode in motor, coil KM2 electrifications, coil KM2's is normal
Contact closure to be opened, is worked under motor power frequency pattern, the normally-closed contact of the coil KM2 in variable frequency starting control loop disconnects,
Motor can not work under variable mode.
Moreover, the input relay in the circuit selects the time relay.
In order to realize frequency of changing a job in frequency conversion failure, is gone here and there in the frequency conversion failure cutting frequency control loop added and be equipped with frequency conversion event
Barrier output switch BP and input relay SJ1 coils.It is parallel with the input relay that string is set at the both ends of input relay SJ1 coils
Normally opened contact, intermediate relay KA4 coils and the input of device SJ1 exits control switch 1ZK.
Meanwhile string sets the normally-closed contact of an input relay SJ1 in variable frequency starting control loop.
Since the variable frequency starting control loop in the embodiment includes two branches, a control loop on the spot, one remote
Square control loop, therefore the normally opened contact for setting an intermediate relay KA4 is gone here and there at the both ends of the control switch in this two branches.
Its working principle is that：
Input exit control switch 1ZK be placed in exit position when, after frequency converter failure, frequency converter output fault-signal,
Frequency conversion failure exports switch BP and is closed, so that input relay SJ1 coils electrification.At this point, in variable frequency starting control loop
In the normally opened contact of input relay SJ1 disconnect so that variable frequency starting control loop disconnects, motor no longer variable frequency work；Together
When, in input relay SJ1 electrification delays after setting time, the normally opened of relay SJ1 is put into subsidiary control loop
Contact closure, intermediate relay KA4 are charged, and the normally opened contact of the intermediate relay KA4 in power frequency startup control loop is closed, and is made
The conducting of power frequency startup control loop is obtained, power frequency startup control loop is started.
Input exit control switch 1ZK be placed in exit position when, after frequency converter failure, frequency converter output fault-signal,
Frequency conversion failure exports switch BP and is closed, so that input relay SJ1 coils electrification.At this point, in variable frequency starting control loop
In the normally opened contact of input relay SJ1 disconnect so that variable frequency starting control loop disconnects, motor no longer variable frequency work.But
It is to be placed in since input exits control switch 1ZK and exit position, subsidiary control loop is no longer turned on, intermediate relay KA4 coils
It can not charge, will not power frequency startup control loop be started by intermediate relay KA4 again, motor also can not power frequency operation.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (4)
1. a kind of frequency conversion failure cutting frequency control circuit, including variable frequency starting control loop and power frequency startup control loop, described
String is equipped with power frequency startup control switch in power frequency startup control loop, which is characterized in that further includes that frequency conversion failure cuts industrial frequency control
Circuit, string is equipped with frequency conversion failure output switch and input relay coil in the frequency conversion failure cutting frequency control loop；It is described
Input relay coil both ends are parallel with subsidiary control loop, and string is equipped with the normally opened of input relay on the subsidiary control loop
Contact and intermediate relay coil；The both ends of the power frequency startup control switch are parallel with the normally opened contact of intermediate relay；Institute
State the normally-closed contact that string in variable frequency starting control loop is equipped with input relay.
2. frequency conversion failure cutting frequency control circuit according to claim 1, which is characterized in that when the input relay is
Between relay.
3. frequency conversion failure cutting frequency control circuit according to claim 2, which is characterized in that the time relay it is normal
It opens the on-delay that contact is the time relay and is closed normally opened contact.
4. frequency conversion failure cutting frequency control circuit according to claim 1, which is characterized in that on the subsidiary control loop
Also string is equipped with input and exits control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810671875.2A CN108683383A (en) | 2018-06-26 | 2018-06-26 | A kind of frequency conversion failure cutting frequency control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810671875.2A CN108683383A (en) | 2018-06-26 | 2018-06-26 | A kind of frequency conversion failure cutting frequency control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108683383A true CN108683383A (en) | 2018-10-19 |
Family
ID=63812107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810671875.2A Pending CN108683383A (en) | 2018-06-26 | 2018-06-26 | A kind of frequency conversion failure cutting frequency control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108683383A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023202063A1 (en) * | 2022-04-20 | 2023-10-26 | 中车青岛四方机车车辆股份有限公司 | Active redundant air conditioning unit and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378813Y (en) * | 1999-05-17 | 2000-05-17 | 沈阳变压器有限责任公司 | Controller of cooler for transformer |
| CN201539394U (en) * | 2009-11-12 | 2010-08-04 | 厦门市万树科技有限公司 | Energy-saving control system of air compressor |
| CN201858132U (en) * | 2010-11-09 | 2011-06-08 | 漯河瑞来信节能科技有限公司 | Fan frequency conversion cabinet with variable-frequency and power-frequency switching function |
| CN103334913A (en) * | 2013-07-25 | 2013-10-02 | 河南省通信电缆有限公司 | Control system of air compressor |
| CN204231257U (en) * | 2014-12-05 | 2015-03-25 | 陕西科沃电气股份有限公司 | A kind of oil pumper frequency-changing control system |
| CN205610514U (en) * | 2016-05-20 | 2016-09-28 | 山东钢铁股份有限公司 | Control circuit of motor |
| CN206790338U (en) * | 2017-05-08 | 2017-12-22 | 北京电力自动化设备有限公司 | Mobyneb frequency conversion tank |
| CN208353256U (en) * | 2018-06-26 | 2019-01-08 | 河南森源电气股份有限公司 | Frequency conversion failure cutting frequency control circuit |
-
2018
- 2018-06-26 CN CN201810671875.2A patent/CN108683383A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2378813Y (en) * | 1999-05-17 | 2000-05-17 | 沈阳变压器有限责任公司 | Controller of cooler for transformer |
| CN201539394U (en) * | 2009-11-12 | 2010-08-04 | 厦门市万树科技有限公司 | Energy-saving control system of air compressor |
| CN201858132U (en) * | 2010-11-09 | 2011-06-08 | 漯河瑞来信节能科技有限公司 | Fan frequency conversion cabinet with variable-frequency and power-frequency switching function |
| CN103334913A (en) * | 2013-07-25 | 2013-10-02 | 河南省通信电缆有限公司 | Control system of air compressor |
| CN204231257U (en) * | 2014-12-05 | 2015-03-25 | 陕西科沃电气股份有限公司 | A kind of oil pumper frequency-changing control system |
| CN205610514U (en) * | 2016-05-20 | 2016-09-28 | 山东钢铁股份有限公司 | Control circuit of motor |
| CN206790338U (en) * | 2017-05-08 | 2017-12-22 | 北京电力自动化设备有限公司 | Mobyneb frequency conversion tank |
| CN208353256U (en) * | 2018-06-26 | 2019-01-08 | 河南森源电气股份有限公司 | Frequency conversion failure cutting frequency control circuit |
Non-Patent Citations (1)
| Title |
|---|
| 于杨: "富士变频器内置继电器输出卡的功能及其应用" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023202063A1 (en) * | 2022-04-20 | 2023-10-26 | 中车青岛四方机车车辆股份有限公司 | Active redundant air conditioning unit and control method |
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