CN108631651A - A kind of electric system and motor frequency conversion control circuit - Google Patents
A kind of electric system and motor frequency conversion control circuit Download PDFInfo
- Publication number
- CN108631651A CN108631651A CN201810720146.1A CN201810720146A CN108631651A CN 108631651 A CN108631651 A CN 108631651A CN 201810720146 A CN201810720146 A CN 201810720146A CN 108631651 A CN108631651 A CN 108631651A
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- China
- Prior art keywords
- relay
- circuit
- series
- frequency converter
- main contactor
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 28
- 230000003111 delayed effect Effects 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/022—Security devices, e.g. correct phase sequencing
- H02P1/026—Means for delayed starting
-
- 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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
-
- 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
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Control Of Ac Motors In General (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Inverter Devices (AREA)
Abstract
A kind of electric system of present invention offer and motor frequency conversion control circuit, 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, the coiler part of the first contact and the first relay of intermediate relay is arranged in series 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 startup circuit of frequency converter.Technical solution provided by the present invention, the also charging complete in frequency converter after delay, can prevent frequency converter occur due to its capacitance does not have charging complete and the phenomenon that cannot normally start.
Description
Technical field
The invention belongs to motor control technology fields, and in particular to a kind of electric system and motor frequency conversion control circuit.
Background technology
Frequency converter (Variable-frequency Drive, VFD) is to apply converter technique and microelectric technique, by changing
Become motor working power Frequency Patterns to control the electric control appliance of ac motor operating status.
Frequency converter mainly by rectification (AC to DC), filtering, inversion (direct current become exchange), brake unit, driving unit,
The equipment such as detection unit microprocessing unit form.Frequency converter adjusts the voltage and frequency of output by the break-make of its internal IGBT
Rate to according to the actual needs of motor provide required voltage for it, and then reaches not only energy saving but also can be to electric machine speed regulation
Purpose；And frequency converter also has many defencive functions, such as overcurrent protection, overvoltage protection, overload protection.With industry
The continuous improvement of the degree of automation, frequency converter have also obtained very extensive application.
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, frequency converter intermediate loop moment can be caused high pressure occur, cause overvoltage protection dynamic
Make, the phenomenon that burning out frequency converter easily occurs.
Invention content
The purpose of the present invention is to provide a kind of electric systems and motor frequency conversion control circuit, for solving in the prior art
In electric motor starting, set frequency converter is not due to having a charging complete and what cannot normally be started ask on circuit for controlling motor
Topic.
To achieve the above object, technical solution provided by the invention 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
Busbar is connect, the other end has been arranged in series frequency converter and main contactor on the main circuit for connecting motor；
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；It is arranged in series the contact part of the second relay and the coil part of main contactor in the main contactor controlling brancher
Point；
First relay is delayed relay, and contact part is arranged on the startup circuit of frequency converter.
Technical solution provided by the present invention is provided with delayed relay on the start-up circuit of frequency converter, is prolonging
When time in can be the devices charging such as capacitance in frequency converter, the capacitor charging after delay in frequency converter is completed, is become
Frequency device can normally start, to prevent frequency converter from occurring not having a charging complete due to its capacitance and what cannot normally be started show
As.
Be further improved as 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.
It is further improved as 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 circuit of outlet side.
Be further improved as to circuit for controlling motor, be also arranged in series on the main circuit the first filter inductance and
Second filter inductance, first filter inductance are arranged on the inlet wire circuit of frequency converter, and the second filter inductance setting exists
On the outlet circuit of frequency converter.
Be further improved as 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, and the second normally opened contact is in parallel with the starting switch
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 busbar, 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；It is arranged in series the contact part of the second relay and the coil part of main contactor in the main contactor controlling brancher
Point；
First relay is delayed relay, and contact part is arranged on the startup circuit of frequency converter.
Be further improved as 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.
It is further improved as to circuit for controlling motor, there are two the main contactor settings, is separately positioned on frequency conversion
On the circuit of device input side and outlet side.
Be further improved as to circuit for controlling motor, be also arranged in series on the main circuit the first filter inductance and
Second filter inductance, first filter inductance are arranged on the inlet wire circuit of frequency converter, and the second filter inductance setting exists
On the outlet circuit of frequency converter.
Be further improved as 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, and the second normally opened contact is in parallel with the starting switch
Setting.
Description of the drawings
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 implementation mode
The purpose of the present invention is to provide a kind of electric systems and motor frequency conversion control circuit, for solving in the prior art
In electric motor starting, set frequency converter is not due to having a charging complete and what cannot normally be started ask on circuit for controlling motor
Topic.
To achieve the above object, technical solution provided by the invention 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
Busbar is connect, the other end has been arranged in series frequency converter and main contactor on the main circuit for connecting motor；
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；It is arranged in series the contact part of the second relay and the coil part of main contactor in the main contactor controlling brancher
Point；
First relay is delayed relay, and contact part is arranged on the startup circuit of frequency converter.
Technical scheme of the present invention 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.
The electric system that the present embodiment is provided, 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, including 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 busbar, the first main contactor KM1 and the first filter inductance L1 series connection
It is arranged on the circuit that inverter input connects three-phase alternating current busbar, and three-phase alternating current busbar is connected in inverter input
Circuit breaker Q F is additionally provided on circuit.
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 circuit that inverter output terminal connects motor body.
In the present embodiment, the secondary circuit of motor frequency conversion control circuit is as shown in Fig. 2, including start and stop branch, delay branch
With main contactor controlling brancher.
Start and stop branch road is arranged in series the coiler part of 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 are 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 act after being delayed accordingly；As the second relay ST2
Coiler part dead electricity when, its contact can just reset after being delayed accordingly；The coiler part and second of first relay ST1
After the coiler part parallel connection of relay ST2, it is arranged in series in delay branch with the contact part of intermediate relay KA1.
After the coiler part parallel connection of first main contactor KM1 and the second main contactor KM2, 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 starts, and starts 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 phases in one end connection circuit breaker Q F in parallel between start and stop branch, delay branch and main contactor controlling brancher in embodiment
Leading-out terminal, the other end connect N rows.
The electric system that the present embodiment is provided, its working principle is that：
When pressing starting switch SB1, 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 of intermediate relay KA1 is closed, is formed and interlocked with the coil of intermediate relay KA1；
After the second normally opened contact of intermediate relay KA1 is closed, 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；Within the time of delay can be frequency converter in capacitor charging, 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 dead electricity of intermediate relay KA1, intermediate relay KA1 first often
It opens contact and the second normally opened contact disconnects, the equal dead electricity of coiler part of the first relay ST1 and the second relay ST2；
After the coiler part dead electricity of the first relay ST1, the start-up circuit of frequency converter disconnects；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
Disconnected again after delay with the contact part of main contactor KM2, thus do not appear in main contactor power-off when 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
Busbar, the other end have been arranged in series frequency converter and main contactor on the main circuit for connecting motor；
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, intermediate relay has been arranged in series in the delay branch
The coiler part of the first contact and the first relay of device, and the coiler part of the first relay has been arranged in parallel the second relay
Coiler part；It is arranged in series the contact part of the second relay and the line of main contactor in the main contactor controlling brancher
Enclose part；
First relay is delayed relay, and contact part is arranged on the startup circuit 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 circuit 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 circuit of frequency converter, described
Second filter inductance is arranged on the outlet circuit 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, and second is normally opened tactile
Point is arranged in parallel with the starting 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 busbar, 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, intermediate relay has been arranged in series in the delay branch
The coiler part of the first contact and the first relay of device, and the coiler part of the first relay has been arranged in parallel the second relay
Coiler part；It is arranged in series the contact part of the second relay and the line of main contactor in the main contactor controlling brancher
Enclose part；
First relay is delayed relay, and contact part is arranged on the startup circuit 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 circuit 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 circuit of frequency converter, second filtering
Inductance is arranged on the outlet circuit of frequency converter.
10. a kind of electric system according to claim 6, which is characterized in that the start stop switch include starting 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
Starting switch is stated to be arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810720146.1A CN108631651A (en) | 2018-07-03 | 2018-07-03 | A kind of electric system and motor frequency conversion control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810720146.1A CN108631651A (en) | 2018-07-03 | 2018-07-03 | A kind of electric system and motor frequency conversion control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108631651A true CN108631651A (en) | 2018-10-09 |
Family
ID=63689489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810720146.1A Pending CN108631651A (en) | 2018-07-03 | 2018-07-03 | A kind of electric system and motor frequency conversion control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108631651A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111865176A (en) * | 2020-07-13 | 2020-10-30 | 广东萨米特陶瓷有限公司 | Method for coping with power supply flash |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201312283Y (en) * | 2008-12-03 | 2009-09-16 | 苏州汉风科技发展有限公司 | High-power intelligent electricity economizer start control device |
| CN201560969U (en) * | 2009-06-24 | 2010-08-25 | 苏州汉风科技发展有限公司 | Intelligent power saving device for water quality purifying plant centrifugal blower |
| CN203933377U (en) * | 2014-04-08 | 2014-11-05 | 江西华宜电气有限公司 | A kind of frequency converter starts the secondary circuit circuit of cabinet |
| CN207475182U (en) * | 2017-11-09 | 2018-06-08 | 上海一德电气科技有限公司 | A kind of frequency conversion or the motor anti-sloshing apparatus of power frequency operation mode |
| CN208386445U (en) * | 2018-07-03 | 2019-01-15 | 河南森源电气股份有限公司 | Electric system and motor frequency conversion control circuit |
-
2018
- 2018-07-03 CN CN201810720146.1A patent/CN108631651A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201312283Y (en) * | 2008-12-03 | 2009-09-16 | 苏州汉风科技发展有限公司 | High-power intelligent electricity economizer start control device |
| CN201560969U (en) * | 2009-06-24 | 2010-08-25 | 苏州汉风科技发展有限公司 | Intelligent power saving device for water quality purifying plant centrifugal blower |
| CN203933377U (en) * | 2014-04-08 | 2014-11-05 | 江西华宜电气有限公司 | A kind of frequency converter starts the secondary circuit circuit of cabinet |
| CN207475182U (en) * | 2017-11-09 | 2018-06-08 | 上海一德电气科技有限公司 | A kind of frequency conversion or the motor anti-sloshing apparatus of power frequency operation mode |
| CN208386445U (en) * | 2018-07-03 | 2019-01-15 | 河南森源电气股份有限公司 | Electric system and motor frequency conversion control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111865176A (en) * | 2020-07-13 | 2020-10-30 | 广东萨米特陶瓷有限公司 | Method for coping with power supply flash |
| CN111865176B (en) * | 2020-07-13 | 2022-03-22 | 广东萨米特陶瓷有限公司 | Method for coping with power supply flash |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181009 |
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| RJ01 | Rejection of invention patent application after publication |