CN205792223U - Bleeder circuit and transverter - Google Patents
Bleeder circuit and transverter Download PDFInfo
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- CN205792223U CN205792223U CN201620700055.8U CN201620700055U CN205792223U CN 205792223 U CN205792223 U CN 205792223U CN 201620700055 U CN201620700055 U CN 201620700055U CN 205792223 U CN205792223 U CN 205792223U
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- inverter
- bleeder
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- leadage circuit
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- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
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- 238000010586 diagram Methods 0.000 description 8
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- 238000005516 engineering process Methods 0.000 description 4
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- 206010014357 Electric shock Diseases 0.000 description 1
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Abstract
The utility model discloses a bleeder circuit and transverter. The utility model discloses a bleeder circuit includes a bleeder resistor and a control switch connected in series with the bleeder resistor, wherein, the bleeder circuit is connected in parallel with the bus capacitor of the converter; the bleeder resistor and the control switch are connected between the positive pole and the negative pole of the direct current bus of the converter. The utility model discloses can realize that the remaining charge of direct current bus voltage when transverter shut down releases the function controllable: when the converter works normally, the bleeder circuit is not connected; when the converter is shut down, the converter is automatically connected into a discharge circuit to discharge residual charges on the direct current bus in time. When the transverter normally works, the bleeder circuit is cut out, and bleeder resistance can not generate heat, from this the utility model discloses above-mentioned embodiment has reduced the unnecessary loss on the one hand, and on the other hand can not make the inside temperature of transverter rise yet to the reliability of system has been improved.
Description
Technical field
This utility model relates to inverter field, particularly to a kind of leadage circuit and inverter.
Background technology
The main topology of existing high-power frequency conversion centrifugal chiller inverter generally uses " AC-DC-AC " structure.Fig. 1 is existing
There is the main structure chart of high-power frequency conversion centrifugal chiller inverter.As it is shown in figure 1, the rectification module 1 of inverter and inversion mould
It is attached by dc bus 3 between block 2.Alternating current inputs, and sets up DC potential by rectification module 1, in intermediate link
I.e. access bigger bus capacitor 4 on dc bus 3 for energy storage.
Higher voltage is established, when inverter is shut down on dc bus 3 on inverter operationally dc bus 3
Residual charge need to be released through bleed-off circuit, otherwise can there is potential safety hazard.Presently used scheme is dc bus 3 liang
End is directly accessed bleeder resistance 5 and realizes this function, whether under which kind of state, as long as having voltage, vent discharge on dc bus 3
Resistance 5 on will consumed energy, cause energy dissipation, and resistance heating can make inverter inside temperature raise.
Utility model content
In view of above technical problem, this utility model provides a kind of leadage circuit and inverter, it is achieved that inverter stops
During machine, DC bus-bar voltage residual charge drainage function is controlled.
According to an aspect of the present utility model, it is provided that a kind of leadage circuit, release including bleeder resistance and with described
The control switch of resistant series, wherein:
Described leadage circuit is in parallel with the bus capacitor of inverter；
Between positive pole and the negative pole of the dc bus that described bleeder resistance and described control switch are connected to described inverter.
In an embodiment of the present utility model, described control switchs the normally-closed contact for catalyst.
In an embodiment of the present utility model, described catalyst is A.C. contactor or D.C. contactor.
In an embodiment of the present utility model, described catalyst is A.C. contactor；Ac contactor coil upper
Electricity, the powering on of power-off sequential and inverter, power-off sequential are consistent.
In an embodiment of the present utility model, described catalyst is D.C. contactor；
Described leadage circuit also includes controller, wherein:
D.C. contactor coil is connected with controller；
In the case of inverter works on power, controller obtains electric, and makes D.C. contactor coil obtain by output switch parameter
Electricity；In the case of inverter power down is shut down, controller power down quits work so that D.C. contactor coil power down.
In an embodiment of the present utility model, described leadage circuit also includes indicator light circuit, wherein:
Indicator light circuit is connected in parallel with bleeder resistance；
Indicator light circuit includes display lamp, wherein display lamp bright or go out and indicate the feelings of releasing of dc bus residual charge
Condition.
In an embodiment of the present utility model, described indicator light circuit also includes bleeder circuit, wherein:
Bleeder circuit is connected with display lamp；
Display lamp both end voltage is reduced to no more than display lamp rated voltage by bleeder circuit.
In an embodiment of the present utility model, described bleeder circuit includes the first divider resistance and the second dividing potential drop electricity
Resistance, wherein:
First divider resistance and the second divider resistance are connected in series, and display lamp and the first divider resistance are connected in parallel.
In an embodiment of the present utility model, the first divider resistance and the second divider resistance meet equation below:
Wherein, U0For display lamp rated voltage, UmaxMaximum for inverter DC bus-bar voltage.
According to another aspect of the present utility model, it is provided that a kind of inverter, including releasing described in any of the above-described embodiment
Circuit.
This utility model realize inverter shut down time DC bus-bar voltage residual charge drainage function controlled: when inverter just
Often during work, leadage circuit does not accesses；Automatically access leadage circuit when inverter is shut down, release on dc bus in time
Residual charge.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of inverter in one embodiment of prior art.
Fig. 2 be in this utility model first embodiment leadage circuit in the connection diagram of inverter.
Fig. 3 be in this utility model the second embodiment leadage circuit in the connection diagram of inverter.
Fig. 4 be in this utility model the 3rd embodiment leadage circuit in the connection diagram of inverter.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Description only actually at least one exemplary embodiment is illustrative below, never as to this practicality
Any restriction that is novel and that apply or use.Based on the embodiment in this utility model, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under creative work premise, broadly fall into the scope of this utility model protection.
Unless specifically stated otherwise, the parts illustrated the most in these embodiments and the table positioned opposite, digital of step
Reach formula and numerical value is not intended to scope of the present utility model.
Simultaneously, it should be appreciated that for the ease of describing, the size of the various piece shown in accompanying drawing is not according to reality
Proportionate relationship draw.
May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of when, described technology, method and apparatus should be considered to authorize a part for description.
It is shown here that any occurrence should be construed as merely exemplary with in all examples discussed, and not
It is as restriction.Therefore, other example of exemplary embodiment can have different values.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it is further discussed in accompanying drawing subsequently.
It has been found that there is following technical problem in the inverter leadage circuit of Fig. 1 prior art: when 1, inverter is shut down
DC bus-bar voltage residual charge drainage function is uncontrollable；2, during inverter work, bleeder resistance accesses dc bus all the time, makes
Become energy dissipation, make current transformer internal temperature rise raise simultaneously.
Fig. 2 be in this utility model first embodiment leadage circuit in the connection diagram of inverter.Letting out as shown in Figure 2
Electric discharge road includes bleeder resistance 61 and the control switch 62 being connected in series with bleeder resistance 61, wherein:
Bleeder resistance 61 and control switch 62 leadage circuits in series.
This leadage circuit is in parallel with the bus capacitor 4 of inverter.
Between positive pole and the negative pole of the dc bus 3 that this leadage circuit is connected to inverter.
In the case of inverter is in the normal work that powers on, controlling switch 62 disconnection, bleeder resistance 61 does not accesses.Such as figure
Shown in 2, in the case of inverter is in power down shutdown, controls switch 62 Guan Bi, access bleeder resistance 61, can release in time
Fall the residual charge on dc bus 3.
The leadage circuit provided based on this utility model above-described embodiment, it is possible to achieve dc bus electricity when inverter is shut down
Pressure residual charge drainage function is controlled: when inverter normally works, leadage circuit does not accesses；Automatically connect when inverter is shut down
Enter leadage circuit, the residual charge on dc bus of releasing in time.
This utility model above-described embodiment leadage circuit when inverter normally works is cut out, and bleeder resistance will not be sent out
Heat.Thus on the one hand this utility model above-described embodiment decreases unnecessary loss, on the other hand also will not making inverter
Portion's temperature raises, thus improves the reliability of system.
In an embodiment of the present utility model, control switch 62 and can be implemented as the normally-closed contact of catalyst, wherein
Catalyst can be A.C. contactor or D.C. contactor.The normally-closed contact of catalyst is in the cold situation of contactor coil
Under, it is in closure state；In the case of contactor coil is energized, it is off.
Thus, the energising sequential of contactor coil can be set to by this utility model above-described embodiment: at inverter just
When often working, contactor coil is energized；When inverter power down is shut down, contactor coil power-off.Hereby it is accomplished the change of current
When device is shut down, DC bus-bar voltage residual charge drainage function is controlled.I.e., it is possible to be embodied as: release when inverter normally works
Circuit does not accesses；Leadage circuit is automatically accessed, the residual charge on dc bus of releasing in time when inverter is shut down.
Below by specific embodiment, this utility model is described further.
First specific embodiment:
In this utility model the first specific embodiment, catalyst specifically can use D.C. contactor.Leadage circuit is also
Controller can be included, wherein:
D.C. contactor coil is connected with controller, by controller to D.C. contactor coil power supply.
In the case of inverter system powers on, controller first electric, make direct current contact by output switch parameter the most again
Device coil obtains electric so that D.C. contactor normally-closed contact disconnects, and cuts out leadage circuit.
In the case of inverter system power down, controller power down quits work, then the power down of D.C. contactor coil so that
Catalyst normally-closed contact closes, and accesses leadage circuit, releases dc bus residual charge.
Second specific embodiment:
In this utility model the second specific embodiment, catalyst specifically can supply electricity to connect by exchange with A.C. contactor
Tentaculum coil power supply.
The powering on of ac contactor coil, the powering on of power-off sequential and inverter, power-off sequential are consistent.
Ac contactor coil can be powered by same alternating current power supply with inverter system.
In the case of inverter system powers on, D.C. contactor coil obtains electric, and D.C. contactor normally-closed contact disconnects, directly
Stream bus residual charge leadage circuit is disconnected.
In the case of inverter system power down, D.C. contactor coil power down, D.C. contactor normally-closed contact closes, connects
Enter dc bus residual charge leadage circuit, dc bus residual charge is released.
In this utility model the first specific embodiment (using the embodiment of D.C. contactor), leadage circuit obtains at controller
Cut out after electricity, when there is short time-delay, inverter electrifying startup in the process, bleeder resistance has a small amount of energy loss, and
And D.C. contactor generates heat more apparent in use.Compared with the first specific embodiment, it is embodied as at this utility model second
In the example embodiment of A.C. contactor (use), leadage circuit powers at inverter, access when shutting down, cut out no-delay, incompetent
Amount is lost, and A.C. contactor generates heat inconspicuous in use.Therefore, compared with this utility model the first specific embodiment,
This utility model the second specific embodiment is more excellent embodiment.
It has been found that the leadage circuit of Fig. 1 prior art there is also the time of releasing, the indefinite technology of degree of releasing is asked
Topic.
Fig. 3 be in this utility model the second embodiment leadage circuit in the connection diagram of inverter.Fig. 3 embodiment is concrete
For the connection diagram of leadage circuit under inverter stopped status.Compared with Fig. 2 embodiment, in the embodiment shown in fig. 3, release
Circuit can also include indicator light circuit 63, wherein:
In the embodiment shown in fig. 3, leadage circuit is made up of bleeder resistance 61, control switch 62 and indicator light circuit 63.
As it is shown on figure 3, bleeder resistance 61 and control switch 62 are connected in series；Indicator light circuit 63 is connected in parallel with bleeder resistance 61.
Indicator light circuit 63 includes display lamp, wherein:
Display lamp, for by the bright of display lamp or the relief situation of instruction dc bus 3 residual charge that goes out.
In this utility model above-described embodiment, in the case of inverter system power down, such as catalyst normally-closed contact
When controlling switch 62 Guan Bi, access bleeder resistance 61 carries out dc bus residual charge and releases；Display lamp is bright simultaneously, along with bus
The reduction of voltage, display lamp is the most dimmed, until busbar voltage is released to below the safe voltage of setting, display lamp extinguishes.By
This, debugging or maintainer can be according to the bright of display lamp or go out and judge whether dc bus residual charge is released to safe voltage
Hereinafter, thus reduce Danger Electric shock risk.
In an embodiment of the present utility model, indicator light circuit 63 is in addition to including display lamp, it is also possible to include point
Volt circuit, wherein:
Bleeder circuit is connected with display lamp.
Bleeder circuit, for display lamp both end voltage is reduced to no more than display lamp rated voltage, enables display lamp
Normal work.
Fig. 4 be in this utility model the 3rd embodiment leadage circuit in the connection diagram of inverter.Fig. 4 embodiment is concrete
For the connection diagram of leadage circuit under inverter stopped status.Compared with Fig. 3 embodiment, indicator light circuit 63 can include referring to
Showing lamp 631 and bleeder circuit, wherein bleeder circuit can include the first divider resistance R1With the second divider resistance R2, wherein:
First divider resistance R1With the second divider resistance R2It is connected in series, display lamp 631 and the first divider resistance R1Parallel connection is even
Connect.
First divider resistance R1With the second divider resistance R2Meet equation below:
Wherein, U0For display lamp rated voltage, UmaxMaximum for inverter DC bus-bar voltage.
Can ensure that display lamp both end voltage is not more than display lamp rated voltage U by this utility model above-described embodiment0,
Display lamp is enable normally to work.
This utility model above-described embodiment increases display lamp at leadage circuit, for indicating letting out of dc bus residual charge
Put degree.When inverter is in stopped status, leadage circuit work, light display lamp, along with the reduction of DC bus-bar voltage,
Display lamp is the most dimmed to extinguishing, and represents that bus residual charge is released to below safe voltage, thus solves in prior art
Release time and the indefinite technical problem of degree.
According to another aspect of the present utility model, it is provided that a kind of inverter, including releasing described in any of the above-described embodiment
Circuit.
In an embodiment of the present utility model, this inverter can be changing described in any embodiment in Fig. 2-Fig. 4
Stream device.
The inverter provided based on this utility model above-described embodiment, accesses instruction in the parallel connection of original bleeder resistance two ends
Lamp, Access Control of connecting the most again switch composition bleed-off circuit, it is achieved thereby that dc bus residual charge when inverter is shut down
Automatically release, it is possible to observe to release whether completing by display lamp.
Controller described above can be implemented as the general processor for performing function described herein, can
Programmed logic controller (PLC), digital signal processor (DSP), special IC (ASIC), field programmable gate array
Or other PLDs, discrete gate or transistor logic, discrete hardware components or it is any (FPGA)
Appropriately combined.
So far, this utility model is described in detail.In order to avoid covering design of the present utility model, this is not described
Some details well known to field.Those skilled in the art are as described above, complete it can be appreciated how implement public here
The technical scheme opened.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can pass through hardware
Completing, it is also possible to instruct relevant hardware by program and complete, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read only memory, disk or CD etc..
Description of the present utility model is given for the sake of example and description, and is not exhaustively or to incite somebody to action this
Utility model is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.
Selecting and describing embodiment is in order to principle of the present utility model and actual application are more preferably described, and makes the common skill of this area
Art personnel it will be appreciated that this utility model thus design is suitable to the various embodiments with various amendments of special-purpose.
Claims (10)
1. a leadage circuit, it is characterised in that bleeder resistance (61) and the control connected with described bleeder resistance (61) are opened
Close (62), wherein:
Described leadage circuit is in parallel with the bus capacitor of inverter (4)；
Described bleeder resistance (61) and described control switch (62) are connected to the positive pole of the dc bus (3) of described inverter and bear
Between pole.
Leadage circuit the most according to claim 1, it is characterised in that
The described switch (62) that controls is the normally-closed contact of catalyst.
Leadage circuit the most according to claim 2, it is characterised in that
Described catalyst is A.C. contactor or D.C. contactor.
Leadage circuit the most according to claim 3, it is characterised in that
Described catalyst is A.C. contactor；
The powering on of ac contactor coil, the powering on of power-off sequential and inverter, power-off sequential are consistent.
Leadage circuit the most according to claim 3, it is characterised in that
Described catalyst is D.C. contactor；
Described leadage circuit also includes controller, and wherein, D.C. contactor coil is connected with controller；
In the case of inverter works on power, controller obtains electric, and it is electric to make D.C. contactor coil obtain by output switch parameter；Change
In the case of stream device power down is shut down, controller power down quits work so that D.C. contactor coil power down.
6. according to the leadage circuit according to any one of claim 1-5, it is characterised in that also include indicator light circuit (63),
Wherein:
Indicator light circuit (63) is connected in parallel with bleeder resistance (61)；
Indicator light circuit (63) includes display lamp (631), wherein display lamp (631) bright or go out and indicate dc bus remnants electricity
The relief situation of lotus.
Leadage circuit the most according to claim 6, it is characterised in that described indicator light circuit (63) also includes dividing potential drop electricity
Road, wherein:
Bleeder circuit is connected with display lamp (631), and display lamp (631) both end voltage is reduced to no more than display lamp by bleeder circuit
Rated voltage.
Leadage circuit the most according to claim 7, it is characterised in that described bleeder circuit includes the first divider resistance (R1)
With the second divider resistance (R2), wherein:
First divider resistance (R1) and the second divider resistance (R2) be connected in series, display lamp (631) and the first divider resistance (R1) and
Connection connects.
Leadage circuit the most according to claim 8, it is characterised in that the first divider resistance (R1) and the second divider resistance
(R2) meet equation below:
Wherein, U0For display lamp rated voltage, UmaxMaximum for inverter DC bus-bar voltage.
10. an inverter, it is characterised in that include leadage circuit as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620700055.8U CN205792223U (en) | 2016-07-04 | 2016-07-04 | Bleeder circuit and transverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620700055.8U CN205792223U (en) | 2016-07-04 | 2016-07-04 | Bleeder circuit and transverter |
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| Publication Number | Publication Date |
|---|---|
| CN205792223U true CN205792223U (en) | 2016-12-07 |
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ID=58126519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620700055.8U Active CN205792223U (en) | 2016-07-04 | 2016-07-04 | Bleeder circuit and transverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205792223U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915041A (en) * | 2016-07-04 | 2016-08-31 | 珠海格力电器股份有限公司 | Charge bleeding method, bleeding circuit and current converter |
| CN114301271A (en) * | 2021-07-05 | 2022-04-08 | 华为数字能源技术有限公司 | Power conversion system and control method |
-
2016
- 2016-07-04 CN CN201620700055.8U patent/CN205792223U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915041A (en) * | 2016-07-04 | 2016-08-31 | 珠海格力电器股份有限公司 | Charge bleeding method, bleeding circuit and current converter |
| CN114301271A (en) * | 2021-07-05 | 2022-04-08 | 华为数字能源技术有限公司 | Power conversion system and control method |
| CN114301271B (en) * | 2021-07-05 | 2024-03-01 | 华为数字能源技术有限公司 | Power conversion system and control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |