CN206341139U - A kind of high-voltage frequency converter pre-charging circuit - Google Patents
A kind of high-voltage frequency converter pre-charging circuit Download PDFInfo
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- CN206341139U CN206341139U CN201720048441.8U CN201720048441U CN206341139U CN 206341139 U CN206341139 U CN 206341139U CN 201720048441 U CN201720048441 U CN 201720048441U CN 206341139 U CN206341139 U CN 206341139U
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- charging module
- circuit
- frequency converter
- charging
- short circuit
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Abstract
High-voltage frequency converter pre-charging circuit is planted, including starting switch is used to export enabling signal, including the first charging module, is coupled between starting switch and frequency converter, for being pre-charged for the first time to frequency converter；Second charging module, is coupled between starting switch and frequency converter, is pre-charged for second to frequency converter；Short circuit is bypassed, and is coupled between starting switch and frequency converter, for the charging module of short circuit first and the second charging module；First timing circuit, timing is started in response to enabling signal, controls the first charging module to work in the first preset time, the open circuit of the second charging module, and output switching signal controls the work of the second charging module, the open circuit of the first charging module after the first preset time terminates；Second timing circuit, timing is started in response to opening signal, short circuit signal control short circuit by-path turn-on is exported after the second preset time with the charging module of short circuit first and the second charging module, with reduction charging load caloric value effect while precharge is realized.
Description
Technical field
The utility model is related to high-voltage frequency converter technology field, more particularly to a kind of high-voltage frequency converter pre-charging circuit.
Background technology
With expanding economy and energy-saving requirement, high voltage converter is answered in the factory more and more
With.High voltage converter is generally made up of phase-shifting transformer, power cell, heat abstractor and control section, power cell built with
The electric capacity of Large Copacity, when high voltage converter is begun to power up, these electric capacity absorb electric energy charging from power network, and frequency converter will be caused defeated
Enter side current value instantaneously to raise, its peak value is likely to be breached 10 times of rated current, big electricity certainly will be so caused to phase-shifting transformer
Stream impact.This phenomenon also result in the instantaneous of line voltage and falls simultaneously, influence the power supply quality of power network, this problem is universal
It is present in current existing various high-voltage variable-frequency and variable-speed systems.
Method conventional at present is connected a charging resistor in the charge circuit, is gushed by the charging resistor to suppress charging
Stream.
Because such charging circuit is single resistance, thus during charging, the caloric value for filling a resistance is big, can cause
Make the bulk temperature of frequency converter too high, reduce the security of frequency converter, while can also reduce the service life of frequency converter.
Utility model content
The purpose of this utility model is to provide a kind of high-voltage frequency converter pre-charging circuit, with the same of realization precharge
When reduce charging load caloric value effect.
Above-mentioned purpose of the present utility model technical scheme is that：
A kind of high-voltage frequency converter pre-charging circuit, including starting switch are used to export enabling signal, including
First charging module, is coupled between starting switch and frequency converter, for being pre-charged for the first time to frequency converter；
Second charging module, is coupled between starting switch and frequency converter, is pre-charged for second to frequency converter；
Short circuit is bypassed, and is coupled between starting switch and frequency converter, for the charging module of short circuit first and the second charging mould
Block；
First timing circuit, timing is started in response to enabling signal, and the first charging module is controlled in the first preset time
Work, the open circuit of the second charging module, output switching signal controls the work of the second charging module after the first preset time terminates, the
The open circuit of one charging module；
Second timing circuit, timing is started in response to opening signal, the control of short circuit signal is exported after the second preset time short
By-path turn-on is connect with the charging module of short circuit first and the second charging module.
By using above-mentioned technical proposal, by the first charging module and the second charging module the first timing circuit control
Frequency converter is charged in two times under system, prevents that single charging module from, due to charging duration, causing the equivalent negative in charging module
Carry temperature too high, the bulk temperature of frequency converter can be caused too high, the security of frequency converter, the second timing circuit and first is reduced
Timing circuit starts simultaneously at timing, and the time span of the second preset time is greater than the time span of the first preset time, when
Short circuit by-path turn-on is controlled after the second time makes frequency converter be worked under normal high pressure, and the time is ensured by timing circuit
Accuracy.
Improved as of the present utility model, first charging module includes the first equivalent load and the first normally-closed contact,
Second charging module includes the second equivalent load and the first normally opened contact, and the short circuit bypass includes the second normally opened contact,
First charging module, the second charging module and short circuit bypass are arranged in parallel, and first normally-closed contact is in response to cutting
Signal disconnection is changed, second normally opened contact is closed in response to switching signal.
By using above-mentioned technical proposal, the first charging module, the second charging module and short circuit are bypassed into equal parallel connection and set
Put, the first normally opened contact and the first normally-closed contact are arranged in series the first equivalent load and the second equivalent load respectively, and first normal
Contact and the linkage of the first normally-closed contact are opened, the effect that the first equivalent load and the second equivalent load are turned on indirectly is realized, second is normal
Equivalent to one wire when opening the closing of contact, electric current can be because the inertia of itself, so that the first charging module and second be charged
Module is shorting out.
Improved as of the present utility model, the resistance of second equivalent load is less than the resistance of the first equivalent load.
By using above-mentioned technical proposal, so set because the resistance of the first equivalent load is larger, then corresponding
One equivalent load voltage dividing ability is stronger, and slowly electric capacity can be charged in the first stage, when charging between when reaching, first
Equivalent load can generate heat, in order to prevent that the first equivalent load from overheating, and now, the first timing circuit output switching signal is switched to the
Two equivalent loaded work pieces, and the resistance of the second equivalent load is less than the second equivalent load, reduces the partial pressure to frequency converter, accelerates pre-
Charging interval.
Improved as of the present utility model, first charging module is arranged in series with second charging module, described
The branch circuit parallel connection that short circuit bypass is connected with first charging module and the second charging module.
By using above-mentioned technical proposal, the first charging module and the second charging module are arranged in series and bypassed with short circuit
It is arranged in parallel, so as to realize the effect being pre-charged to frequency converter.
Improved as of the present utility model, first timing circuit is set to counter, the counter includes triggering
End and spilling end, the triggering end are triggered in response to enabling signal, and first charging module includes the first NPN being arranged in parallel
End is overflowed in triode and first resistor, the base stage coupling of first NPN triode；Second charging module includes NOT gate electricity
Road and the second NPN triode and second resistance are arranged in parallel, end is overflowed in the input coupling of the not circuit, described the
The base stage of two NPN triodes couples the output end of not circuit.
By using above-mentioned technical proposal, charging module includes NPN triode and the resistance being arranged in parallel, when triode is led
When logical, branch road is shorted resistance equivalent to wire where triode, when the base stage of triode is not received by signal, and three
Branch road where pole pipe does work equivalent to open circuit, now resistance to electric energy.
Improved as of the present utility model, the resistance of the second resistance is less than the resistance of first resistor.
By using above-mentioned technical proposal, the resistance of second resistance is larger slowly to charge with frequency converter, the resistance of first resistor
The small precharge effect that can accelerate to frequency converter of value.
In summary, the utility model has the advantages that：Existed by the first charging module and the second charging module
Frequency converter is charged in two times under the control of first timing circuit, prevents that single charging module from, due to charging duration, causing to fill
Equivalent load temperature in electric module is too high, and the bulk temperature of frequency converter can be caused too high, reduces the security of frequency converter, the
Two timing circuits and the first timing circuit start simultaneously at timing, and the second preset time time span be greater than first it is default when
Between time span, when after the second time control short circuit by-path turn-on frequency converter is worked under normal high pressure, pass through meter
When circuit ensure the time accuracy.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of embodiment 1；
Fig. 2 is the circuit theory diagrams of embodiment 2.
In figure, the 1, first charging module；2nd, the second charging module；3rd, short circuit is bypassed；4th, the first timing circuit；5th, the second meter
When circuit.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment 1,
Shown in reference picture 1, a kind of high-voltage frequency converter pre-charging circuit, including for export enabling signal starting switch,
First charging module 1, the second charging module 2, the first timing circuit 4, the second timing circuit 5 and short circuit bypass 3, are connected afterwards
Conventional rectification, filtering, inversion so as to realize to load VFC, wherein, the first charging module 1, the second charging module 2 with
And short circuit bypass 3 is arranged in parallel, and the first charging module 1 includes being arranged in series to obtain resistance R1 and normally-closed contact K1, the second charging
Module 2 includes the resistance R2 and normally opened contact K1 being arranged in series, and short circuit bypass 3 includes normally opened contact K2, the He of the first timing circuit 4
Second timing circuit 5 is disposed as counter, and 5 timing times of the first timing circuit 4 and the second timing circuit, and electricity
The resistance for hindering R2 is less than resistance R1 resistance.
Specific works state is the counting of the first timing circuit 4 and the second timing circuit 5 when being pressed key switch K
The Enable Pin of device, which is triggered, starts timing, in this period of timing, by the resistance R1 of the first charging module 1 to frequency converter
Enter line precharge, after the timing of the first timing circuit 4 terminates, the spilling end output high level signal of the first timing circuit 4, so that
Driving coil K1 obtains electric, so that normally-closed contact K1 disconnects, normally opened contact K1 closures, the now short circuit of the first charging module 1, second fills
Electric module 2 is turned on, and line precharge is entered to frequency converter by the resistance R2 of the second charging module 2, when the timing knot of the second timing circuit 5
Shu Hou, now the second timing circuit 5 spilling end output high point ordinary mail number, turn on relay coil K2, so that normally opened touch
Point K2 is closed, and now short circuit bypass 3 is turned on, and the first charging module 1 and the second charging module 2 are shorted, and are in frequency converter
Function under normal voltage.
Embodiment 2,
Shown in reference picture 2, a kind of high-voltage frequency converter pre-charging circuit, including for export enabling signal starting switch,
First charging module 1, the second charging module 2, the first timing circuit 4, the second timing circuit 5 and short circuit bypass 3, are connected afterwards
Conventional rectification, filtering, inversion so as to realize to load VFC, wherein, starting switch, the first charging module 1 and the
The two ends parallel connection that two charging modules 2 are arranged in series and short circuit bypass 3 is connected with the first charging module 1 and the second charging module 2 is set
Put, the first charging module 1 includes the NPN triode VT1 and resistance R1 being arranged in parallel, the second charging module 2 includes not circuit
With the NPN triode VT2 and resistance R2 being arranged in parallel, wherein, the input of VT1 base stage and not circuit couples the first timing
The spilling end of circuit 4, the output end of not circuit couples VT2 base stage, the spilling end coupling short circuit bypass of the first timing circuit 4
NPN triode VT3 base stage coupling in 3.
Specific works mode is, when button switch K " start when, the first timing circuit 4 and the second timing circuit 5 are opened simultaneously
Beginning timing, in timing time, the spilling end of the first timing circuit 4 output low level signal, now VT1 be not turned on, and VT2 by
Turned in the presence of not circuit, then resistance R4 is shorted, and the resistance R3 of the first charging module 1 carried out preliminary filling to frequency converter
Electricity, the first timing circuit 4 output high level signal after the first preset time is met, VT1 conductings, short circuit resistance R3, VT2 are disconnected
Open, now, line precharge is entered to frequency converter by the resistance R4 in the second charging module 2, when the timing of the second timing circuit 5 is finished
Afterwards, it overflows end output high level signal VT3 conductings, and now the first charging module 1 and the second charging module 2 are shorted.
This specific embodiment is only to explain of the present utility model, and it is not to limitation of the present utility model, ability
Field technique personnel can make the modification without creative contribution to the present embodiment as needed after this specification is read, but
As long as all being protected in right of the present utility model by Patent Law.
Claims (6)
1. a kind of high-voltage frequency converter pre-charging circuit, including starting switch are used to export enabling signal, it is characterised in that：Including
First charging module (1), is coupled between starting switch and frequency converter, for being pre-charged for the first time to frequency converter；
Second charging module (2), is coupled between starting switch and frequency converter, is pre-charged for second to frequency converter；
Short circuit bypasses (3), is coupled between starting switch and frequency converter, is charged for the charging module of short circuit first (1) and second
Module (2)；
First timing circuit (4), timing is started in response to enabling signal, and the first charging module is controlled in the first preset time
(1) work, the second charging module (2) open circuit, output switching signal controls the second charging module after the first preset time terminates
(2) work, the first charging module (1) open circuit；
Second timing circuit (5), timing is started in response to opening signal, and short circuit signal control short circuit is exported after the second preset time
(3) conducting is bypassed with the charging module of short circuit first (1) and the second charging module (2).
2. a kind of high-voltage frequency converter pre-charging circuit according to claim 1, it is characterised in that：First charging module
(1) the first equivalent load and the first normally-closed contact are included, second charging module (2) is normal including the second equivalent load and first
Open contact, the short circuit bypass (3) includes the second normally opened contact, first charging module (1), the second charging module (2) with
And short circuit bypass (3) is arranged in parallel, first normally-closed contact disconnects in response to switching signal, and second normally opened contact rings
It should be closed in switching signal.
3. a kind of high-voltage frequency converter pre-charging circuit according to claim 2, it is characterised in that：Second equivalent load
Resistance be less than the first equivalent load resistance.
4. a kind of high-voltage frequency converter pre-charging circuit according to claim 1, it is characterised in that：First charging module
(1) it is arranged in series with second charging module (2), the short circuit bypass (3) is filled with first charging module (1) and second
The branch circuit parallel connection of electric module (2) series connection.
5. a kind of high-voltage frequency converter pre-charging circuit according to claim 4, it is characterised in that：First timing circuit
(4) counter is set to, the counter includes triggering end and overflows end, and the triggering end is triggered in response to enabling signal, institute
State the first NPN triode and first resistor that the first charging module (1) includes being arranged in parallel, the base of first NPN triode
End is overflowed in pole coupling；Second charging module (2) includes not circuit and is arranged in parallel the second NPN triode and second
End is overflowed in resistance, the input coupling of the not circuit, and the base stage of second NPN triode couples the output of not circuit
End.
6. a kind of high-voltage frequency converter pre-charging circuit according to claim 5, it is characterised in that：The resistance of the second resistance
Resistance of the value less than first resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720048441.8U CN206341139U (en) | 2017-01-16 | 2017-01-16 | A kind of high-voltage frequency converter pre-charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720048441.8U CN206341139U (en) | 2017-01-16 | 2017-01-16 | A kind of high-voltage frequency converter pre-charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206341139U true CN206341139U (en) | 2017-07-18 |
Family
ID=59304884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720048441.8U Expired - Fee Related CN206341139U (en) | 2017-01-16 | 2017-01-16 | A kind of high-voltage frequency converter pre-charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206341139U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107585058A (en) * | 2017-09-29 | 2018-01-16 | 北京新能源汽车股份有限公司 | Charging device and electric automobile |
| CN108322036A (en) * | 2018-04-24 | 2018-07-24 | 华北电力科学研究院有限责任公司 | A kind of novel flexible DC converter station |
| CN108539836A (en) * | 2018-05-31 | 2018-09-14 | 奥克斯空调股份有限公司 | Include the charging circuit and air conditioner of anti-short-circuit protection circuit |
-
2017
- 2017-01-16 CN CN201720048441.8U patent/CN206341139U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107585058A (en) * | 2017-09-29 | 2018-01-16 | 北京新能源汽车股份有限公司 | Charging device and electric automobile |
| CN108322036A (en) * | 2018-04-24 | 2018-07-24 | 华北电力科学研究院有限责任公司 | A kind of novel flexible DC converter station |
| CN108539836A (en) * | 2018-05-31 | 2018-09-14 | 奥克斯空调股份有限公司 | Include the charging circuit and air conditioner of anti-short-circuit protection circuit |
| CN108539836B (en) * | 2018-05-31 | 2024-03-22 | 奥克斯空调股份有限公司 | Charging circuit comprising short-circuit protection circuit and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170718 Termination date: 20210116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |