CN208386445U - Electric system and motor frequency conversion control circuit - Google Patents
Electric system and motor frequency conversion control circuit Download PDFInfo
- Publication number
- CN208386445U CN208386445U CN201821045594.8U CN201821045594U CN208386445U CN 208386445 U CN208386445 U CN 208386445U CN 201821045594 U CN201821045594 U CN 201821045594U CN 208386445 U CN208386445 U CN 208386445U
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- relay
- series
- frequency converter
- main contactor
- circuit
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- Control Of Ac Motors In General (AREA)
Abstract
The utility model provides a kind of electric system and motor frequency conversion control circuit, and wherein motor frequency conversion control circuit includes main circuit and secondary circuit；It has been arranged in series frequency converter and main contactor on the main circuit；Secondary circuit includes start and stop branch, delay branch and main contactor controlling brancher；The coiler part of start stop switch and intermediate relay is arranged in series in start and stop branch, it is arranged in series the first contact of intermediate relay and the coiler part of the first relay in delay branch, and the coiler part of the first relay is arranged in parallel the coiler part of the second relay；The contact part of the second relay and the coiler part of main contactor are arranged in series in main contactor controlling brancher；First relay is delayed relay, and contact part is arranged on the starting route of frequency converter.Technical solution provided by the utility model, the also charging complete in frequency converter after delay, can prevent frequency converter occur due to its capacitor does not have charging complete and the phenomenon that cannot normally start.
Description
Technical field
The utility model belongs to motor control technology field, and in particular to a kind of electric system and motor frequency conversion control electricity
Road.
Background technique
Frequency converter (Variable-frequency Drive, VFD) is using converter technique and microelectric technique, by changing
Power transformation machine frequency mode of working power supply controls the electric control appliance of ac motor operating status.
Frequency converter mainly by rectify (AC to DC), filtering, inversion (direct current become exchange), brake unit, driving unit,
The equipment such as detection unit microprocessing unit composition.Frequency converter adjusts the voltage and frequency of output by the on-off of its internal IGBT
Rate to provide required voltage according to the actual needs of motor for it, and then reaches not only energy conservation but also can be to electric machine speed regulation
Purpose；And there are also many defencive functions, such as overcurrent protection, overvoltage protection, overload protection for frequency converter.With industry
The continuous improvement of the degree of automation, frequency converter also have been widely used.
Due to being provided with the devices such as electrolytic capacitor filter in frequency converter, when frequency converter is arranged in circuit for controlling motor
When, if the electrolytic capacitor when powering in frequency converter does not have charging complete, frequency converter just can not normally start；Work as frequency converter
When normal operation, if disconnecting load suddenly, will cause frequency converter intermediate loop moment there is high pressure, causes overvoltage protection dynamic
Make, the phenomenon that burning out frequency converter easily occurs.
Utility model content
The purpose of this utility model is to provide a kind of electric systems and motor frequency conversion control circuit, for solving existing skill
In art in electric motor starting, set frequency converter cannot normally start due to not having charging complete on circuit for controlling motor
Problem.
To achieve the above object, technical solution provided by the utility model is:
A kind of motor frequency conversion control circuit, including main circuit and secondary circuit；Wherein one end of the main circuit is for connecting
Bus is connect, the other end has been arranged in series frequency converter and main contactor for connecting motor on the main circuit；
The secondary circuit includes start and stop branch, delay branch and main contactor controlling brancher；It is gone here and there in the start and stop branch
Connection is provided with the coiler part of start stop switch and intermediate relay, and the of intermediate relay is arranged in series in the delay branch
The coiler part of one contact and the first relay, and the coiler part of the first relay is arranged in parallel the coil of the second relay
Part；The contact part of the second relay and the coil part of main contactor are arranged in series in the main contactor controlling brancher
Point；
First relay is delayed relay, and contact part is arranged on the starting route of frequency converter.
Technical solution provided by the utility model is provided with delayed relay on the start-up circuit of frequency converter,
It can be the charging of the devices such as the capacitor in frequency converter within the time of delay, the capacitor charging after delay in frequency converter is complete
At frequency converter can normally start, to prevent frequency converter appearance from cannot normally start since its capacitor does not have charging complete
The phenomenon that.
As the further improvement to circuit for controlling motor, appear in order to prevent main contactor power-off when frequency converter due to
Instant cut-off and the problem of burn out, second relay is power-off delay relay.
As the further improvement to circuit for controlling motor, there are two the main contactor settings, is separately positioned on frequency conversion
On the input side of device and the route of outlet side.
Also be arranged in series as the further improvement to circuit for controlling motor, on the main circuit the first filter inductance and
Second filter inductance, first filter inductance are arranged on the inlet wire route of frequency converter, and the second filter inductance setting exists
On the outlet route of frequency converter.
As the further improvement to start and stop branch, the start stop switch includes starting switch and halt switch, the two it
Between be arranged in series；The intermediate relay is additionally provided with the second normally opened contact, the second normally opened contact with it is described start switch it is in parallel
Setting.
A kind of electric system, including motor body and motor frequency conversion control circuit, the motor frequency conversion control circuit include
Main circuit and secondary circuit；Wherein one end of the main circuit connects the motor body for connecting bus, the other end, and
It has been arranged in series frequency converter and main contactor on the main circuit；
The secondary circuit includes start and stop branch, delay branch and main contactor controlling brancher；It is gone here and there in the start and stop branch
Connection is provided with the coiler part of start stop switch and intermediate relay, and the of intermediate relay is arranged in series in the delay branch
The coiler part of one contact and the first relay, and the coiler part of the first relay is arranged in parallel the coil of the second relay
Part；The contact part of the second relay and the coil part of main contactor are arranged in series in the main contactor controlling brancher
Point；
First relay is delayed relay, and contact part is arranged on the starting route of frequency converter.
As the further improvement to circuit for controlling motor, appear in order to prevent main contactor power-off when frequency converter due to
Instant cut-off and the problem of burn out, second relay is power-off delay relay.
As the further improvement to circuit for controlling motor, there are two the main contactor settings, is separately positioned on frequency conversion
On the route of device input side and outlet side.
Also be arranged in series as the further improvement to circuit for controlling motor, on the main circuit the first filter inductance and
Second filter inductance, first filter inductance are arranged on the inlet wire route of frequency converter, and the second filter inductance setting exists
On the outlet route of frequency converter.
As the further improvement to start and stop branch, the start stop switch includes starting switch and halt switch, the two it
Between be arranged in series；The intermediate relay is additionally provided with the second normally opened contact, the second normally opened contact with it is described start switch it is in parallel
Setting.
Detailed description of the invention
Fig. 1 is the structure principle chart of main circuit in electric system embodiment；
Fig. 2 is the structure principle chart of secondary circuit in electric system embodiment.
Specific embodiment
The purpose of this utility model is to provide a kind of electric systems and motor frequency conversion control circuit, for solving existing skill
In art in electric motor starting, set frequency converter cannot normally start due to not having charging complete on circuit for controlling motor
Problem.
To achieve the above object, technical solution provided by the utility model is:
A kind of motor frequency conversion control circuit, including main circuit and secondary circuit；Wherein one end of the main circuit is for connecting
Bus is connect, the other end has been arranged in series frequency converter and main contactor for connecting motor on the main circuit；
The secondary circuit includes start and stop branch, delay branch and main contactor controlling brancher；It is gone here and there in the start and stop branch
Connection is provided with the coiler part of start stop switch and intermediate relay, and the of intermediate relay is arranged in series in the delay branch
The coiler part of one contact and the first relay, and the coiler part of the first relay is arranged in parallel the coil of the second relay
Part；The contact part of the second relay and the coil part of main contactor are arranged in series in the main contactor controlling brancher
Point；
First relay is delayed relay, and contact part is arranged on the starting route of frequency converter.
The technical solution of the utility model is described further With reference to embodiment.
Electric system embodiment:
The present embodiment provides a kind of electric system, including motor body and motor frequency conversion control circuit, motor frequency conversion controls
Frequency converter is provided in circuit, frequency converter first charges on startup, to solve frequency converter since capacitor does not charge
The problem of completing and cannot normally starting.
Electric system provided by the present embodiment, motor frequency conversion control circuit include main circuit and secondary circuit, main electricity
Road is the power supply circuit of motor body, and secondary circuit is the control circuit of motor body.
In the present embodiment, the main circuit of motor frequency conversion control circuit is as shown in Figure 1, include frequency converter, the first main contactor
KM1, the second main contactor KM2, the first filter inductance L1 and the second filter inductance L2.
The input terminal of frequency converter is connect with three-phase alternating current bus, the first main contactor KM1 and the first filter inductance L1 series connection
It is arranged on the route of inverter input connection three-phase alternating current bus, and connects three-phase alternating current bus in inverter input
Circuit breaker Q F is additionally provided on route.
The output end of frequency converter is connect with motor body, and the second main contactor KM2 and the second filter inductance L2 are arranged in series
On the route of inverter output terminal connection motor body.
In the present embodiment, the secondary circuit of motor frequency conversion control circuit is as shown in Fig. 2, include start and stop branch, delay branch
With main contactor controlling brancher.
Start and stop branch road is arranged in series the coiler part for starting switch SB1, halt switch SB2 and intermediate relay KA1；
Intermediate relay KA1 is provided with the first normally opened contact and the second normally opened contact, wherein the first normally opened contact and starting switch SB1 simultaneously
Connection setting, forms interlocking after the coiler part of intermediate relay KA1 obtains electric.
First relay ST1 is start-up study relay, and the second relay ST2 is power-off delay relay, i.e., when first
When the coiler part of relay ST1 obtains electric, its contact part can just be acted after being delayed accordingly；As the second relay ST2
Coiler part power loss when, its contact can just reset after being delayed accordingly；The coiler part and second of first relay ST1
After the coiler part of relay ST2 is in parallel, it is arranged in series in delay branch with the contact part of intermediate relay KA1.
After the coiler part of first main contactor KM1 and the second main contactor KM2 are in parallel, then with the second relay ST2's
Contact part is arranged in series in main contactor controlling brancher.
The contact part of first relay ST1 is arranged in the start-up circuit of frequency converter, when the contact portion of the first relay
When dividing closure, frequency converter starting is started to work.
It is arranged in parallel between start and stop branch, delay branch and main contactor controlling brancher, and is connected after parallel connection between three
Power supply；The power supply of start and stop branch, delay branch and main contactor controlling brancher is provided by ac bus in the present embodiment, therefore this
B phase in connection circuit breaker Q F in one end in parallel between start and stop branch, delay branch and main contactor controlling brancher in embodiment
Leading-out terminal, the other end connect N row.
Electric system provided by the present embodiment, its working principle is that:
When press start switch SB1 when, the coiler part of intermediate relay KA1 obtain it is electric, intermediate relay KA1 first often
It opens contact and the second normally opened contact is closed；
After the first normally opened contact closure of intermediate relay KA1, is formed and interlocked with the coil of intermediate relay KA1；
After the second normally opened contact closure of intermediate relay KA1, the line of the first relay ST1 and the second relay ST2
Circle part it is electric；
Since the first relay ST1 is delayed relay, the first relay ST1 and the second relay ST2's
Coiler part it is electric after, the coiler part of main contactor KM1 and main contactor KM2 electric and contact part is closed, frequency conversion
Device is restarted after delay；Can be the capacitor charging in frequency converter within the time of delay, avoid frequency converter occur due to
The problem of not having charging complete and cannot normally starting.
When pressing shutdown switch SB2, the coiler part power loss of intermediate relay KA1, the first of intermediate relay KA1 is often
It opens contact and the second normally opened contact disconnects, the equal power loss of coiler part of the first relay ST1 and the second relay ST2；
After the coiler part power loss of the first relay ST1, the start-up circuit of frequency converter is disconnected；Due to the second relay
ST2 is power-off delay relay, so the contact part of the second relay ST2 disconnects again after delay, i.e. main contactor KM1
When being disconnected again after delay with the contact part of main contactor KM2, therefore not appearing in main contactor power-off frequency converter by
In instant cut-off is burnt out the problem of.
Circuit embodiments:
The present embodiment provides motor frequency conversion control electricity in a kind of motor frequency conversion control circuit, with above-mentioned electric system embodiment
The structure on road is identical, which is discussed in detail in above-mentioned motor embodiment, seldom explains here.
Claims (10)
1. a kind of motor frequency conversion control circuit, including main circuit and secondary circuit；Wherein one end of the main circuit is for connecting
Bus, the other end have been arranged in series frequency converter and main contactor for connecting motor on the main circuit；
It is characterized in that, the secondary circuit includes start and stop branch, delay branch and main contactor controlling brancher；The start and stop branch
It is arranged in series the coiler part of start stop switch and intermediate relay in road, has been arranged in series intermediate relay in the delay branch
First contact of device and the coiler part of the first relay, and the coiler part of the first relay has been arranged in parallel the second relay
Coiler part；The contact part of the second relay and the line of main contactor are arranged in series in the main contactor controlling brancher
Enclose part；
First relay is delayed relay, and contact part is arranged on the starting route of frequency converter.
2. a kind of motor frequency conversion control circuit according to claim 1, which is characterized in that second relay is power-off
Time-delay relay.
3. a kind of motor frequency conversion control circuit according to claim 1, which is characterized in that the main contactor is provided with two
It is a, it is separately positioned on the route of frequency converter input side and outlet side.
4. a kind of motor frequency conversion control circuit according to claim 1, which is characterized in that also series connection is set on the main circuit
It is equipped with the first filter inductance and the second filter inductance, first filter inductance is arranged on the inlet wire route of frequency converter, described
Second filter inductance is arranged on the outlet route of frequency converter.
5. a kind of motor frequency conversion control circuit according to claim 1, which is characterized in that the start stop switch includes starting
Switch and halt switch, are arranged in series between the two；The intermediate relay is additionally provided with the second normally opened contact, the second normally opened touching
Point is arranged in parallel with described start switch.
6. a kind of electric system, including motor body and motor frequency conversion control circuit, the motor frequency conversion control circuit includes master
Circuit and secondary circuit；For connecting bus, the other end connects the motor body for wherein one end of the main circuit, and
Frequency converter and main contactor have been arranged in series on main circuit；
It is characterized in that, the secondary circuit includes start and stop branch, delay branch and main contactor controlling brancher；The start and stop branch
It is arranged in series the coiler part of start stop switch and intermediate relay in road, has been arranged in series intermediate relay in the delay branch
First contact of device and the coiler part of the first relay, and the coiler part of the first relay has been arranged in parallel the second relay
Coiler part；The contact part of the second relay and the line of main contactor are arranged in series in the main contactor controlling brancher
Enclose part；
First relay is delayed relay, and contact part is arranged on the starting route of frequency converter.
7. a kind of electric system according to claim 6, which is characterized in that second relay is power cut off delay relay
Device.
8. a kind of electric system according to claim 6, which is characterized in that there are two the main contactor settings, respectively
It is arranged on the route of frequency converter input side and outlet side.
9. a kind of electric system according to claim 6, which is characterized in that be also arranged in series first on the main circuit
Filter inductance and the second filter inductance, first filter inductance are arranged on the inlet wire route of frequency converter, second filtering
Inductance is arranged on the outlet route of frequency converter.
10. a kind of electric system according to claim 6, which is characterized in that the start stop switch include start switch and
Halt switch is arranged in series between the two；The intermediate relay is additionally provided with the second normally opened contact, the second normally opened contact and institute
It states to start switch and be arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821045594.8U CN208386445U (en) | 2018-07-03 | 2018-07-03 | Electric system and motor frequency conversion control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821045594.8U CN208386445U (en) | 2018-07-03 | 2018-07-03 | Electric system and motor frequency conversion control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208386445U true CN208386445U (en) | 2019-01-15 |
Family
ID=64963502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821045594.8U Expired - Fee Related CN208386445U (en) | 2018-07-03 | 2018-07-03 | Electric system and motor frequency conversion control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208386445U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631651A (en) * | 2018-07-03 | 2018-10-09 | 河南森源电气股份有限公司 | A kind of electric system and motor frequency conversion control circuit |
-
2018
- 2018-07-03 CN CN201821045594.8U patent/CN208386445U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631651A (en) * | 2018-07-03 | 2018-10-09 | 河南森源电气股份有限公司 | A kind of electric system and motor frequency conversion control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191205 Address after: 100144, No. 1 West well road, Beijing, Shijingshan District Patentee after: Beijing Dongbi Electric Co., Ltd. Address before: Changge City, Xuchang City, Henan province 461500 Weiwu Road, South West Patentee before: Henan Senyuan Electric Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190115 Termination date: 20210703 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |