CN104980011B - A kind of method for reducing bus capacitor ripple - Google Patents
A kind of method for reducing bus capacitor ripple Download PDFInfo
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- CN104980011B CN104980011B CN201510360902.0A CN201510360902A CN104980011B CN 104980011 B CN104980011 B CN 104980011B CN 201510360902 A CN201510360902 A CN 201510360902A CN 104980011 B CN104980011 B CN 104980011B
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- bus capacitor
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- power tube
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Abstract
The invention provides a kind of method for reducing bus capacitor ripple, comprise the following steps：S1, the main power tube for first determining per one-stage transfor-mation are opened, the charging of the state that turn off and bus capacitor, the sequential relationship discharged；When S2, first order sequential relationship M are that bus capacitor charges, main power tube shut-off；Sequential relationship N is：When bus capacitor charges, main power tube is open-minded；Second level sequential relationship R is：When bus capacitor discharges, main power tube is open-minded；Sequential relationship is S：When bus capacitor discharges, main power tube shut-off.If the combination of S3, Two Stages sequential relationship is MS or NR, the carrier phase of the main power tube of Two Stages is synchronous consistent.If the sequential relationship combination of Two Stages is MR or NS, the carrier phase of the main power tube of Two Stages wants misphase 180 degree.The beneficial effects of the invention are as follows：In the case where not increasing the number amount and type of bus capacitor, the switching harmonics of bus capacitor are reduced by the adjustment can of software algorithm.
Description
Technical field
The present invention relates to bus capacitor, more particularly to a kind of method for reducing bus capacitor ripple.
Background technology
The life-span of bus capacitor is a most important factor for restricting power electronic equipment long-term work at present.Bus electricity
The life-span of appearance is longer, and the time of power electronic equipment energy normal work is also longer.The life-span of stable state Down Highway electric capacity is exactly bus
The temperature rise of electric capacity, the ripple of bus capacitor must just be reduced by reducing the temperature rise of bus capacitor, and wherein switching harmonics account for total ripple
A very big proportion.The method of common reduction bus capacitor is exactly to increase the quantity of bus capacitor or use instead to endure more
The bus capacitor of high ripple.
Switching harmonics are reduced in current technology scheme mainly two ways, method A:Increase the quantity of bus capacitor
Or use the bus capacitor that can endure higher ripple instead, generally this means the rising of cost；Method B:The electricity of Two Stages
The carrier phase synchronization of the main power tube of Two Stages in power electronic equipment, but in some cases, synchronously might mean that line
The rising of ripple electric current.
The content of the invention
In order to solve the problems of the prior art, the invention provides a kind of method for reducing bus capacitor ripple.
The invention provides a kind of method for reducing bus capacitor ripple, comprise the following steps：
S1, in the equipment of Two Stages, first determine that the main power tube per one-stage transfor-mation is opened, the state that turns off and bus
The charging of electric capacity, the sequential relationship of electric discharge；
When S2, first order sequential relationship M are that bus capacitor charges, main power tube shut-off；Sequential relationship N is：Bus capacitor
During charging, main power tube is open-minded；Second level sequential relationship R is：When bus capacitor discharges, main power tube is open-minded；Sequential relationship is
S：When bus capacitor discharges, main power tube shut-off；
If the combination of S3, Two Stages sequential relationship is MS or NR, the carrier phase of the main power tube of Two Stages
It is synchronous consistent.If the sequential relationship combination of Two Stages is MR or NS, the carrier wave phase of the main power tube of Two Stages
Want misphase 180 degree in position.
The beneficial effects of the invention are as follows：In the case where not increasing the number amount and type of bus capacitor, it is possible to reduce female
The switching harmonics of line capacitance.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the carrier wave sequential relationship for the method for reducing bus capacitor ripple of the present invention；
Fig. 2 is a kind of schematic diagram for the method another kind carrier wave sequential relationship N for reducing bus capacitor ripple of the present invention.
Embodiment
The present invention is further described for explanation and embodiment below in conjunction with the accompanying drawings.
Figure as shown in Figure 1 to Figure 2, a kind of method for reducing bus capacitor ripple, comprises the following steps：
S1, in the equipment of Two Stages, first determine that the main power tube per one-stage transfor-mation is opened, the state that turns off and bus
The charging of electric capacity, the sequential relationship of electric discharge；
When S2, first order sequential relationship M are that bus capacitor charges, main power tube shut-off；Sequential relationship N is：Bus capacitor
During charging, main power tube is open-minded；Second level sequential relationship R is：When bus capacitor discharges, main power tube is open-minded；Sequential relationship is
S：When bus capacitor discharges, main power tube shut-off
If the combination of S3, Two Stages sequential relationship is MS or NR, the carrier phase of the main power tube of Two Stages
It is synchronous consistent.If the sequential relationship combination of Two Stages is MR or NS, the carrier wave phase of the main power tube of Two Stages
Want misphase 180 degree in position.
When illustrating carrier phase, triangular wave has been used as carrier wave to illustrate, actual carrier wave is not limited only to three
Angle ripple, it is possible to be sawtooth waveforms.
The key point of the present invention will be gone to determine sequential main power device and bus electricity according to the topological structure of every one-stage transfor-mation
The sequential relationship of the charging and discharging state of appearance, the first order are " M ", and " N ", the second level is " R " or " S ".If sequential relationship combines
It is MS or NR, carrier wave needs synchronization, if sequential relationship combination is MR or NS, carrier wave needs misphase 180 degree.
The method of the present invention is in the equipment of Two Stages, first determines that when the main power tube per one-stage transfor-mation is opened be to mother
Line capacitance charging or discharge, be that bus capacitor is charged or discharged during shut-off.Ensure that main power tube is simultaneously during Two Stages
When opening, or being charged together to electric capacity, or electric capacity is discharged together, so most of energy will be become by the first order
Change and flow directly to second level conversion, without going past the bus capacitor change of current, the ripple current of electric capacity is with regard to that can fall.So neither increase
Addition sheet, there is the intrinsic problem that can solve method B.
One UPS device, after a kind of method for reducing bus capacitor ripple provided by the invention, full load bus electricity
The temperature rise of appearance reduces 10 degrees Celsius.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (1)
- A kind of 1. method for reducing bus capacitor ripple, it is characterised in that comprise the following steps：S1, in the equipment of Two Stages, first determine that the main power tube per one-stage transfor-mation is opened, the state that turns off and bus capacitor Charging, electric discharge sequential relationship；When S2, first order sequential relationship M are that bus capacitor charges, main power tube shut-off；Sequential relationship N is：Bus capacitor charges When, main power tube is open-minded；Second level sequential relationship R is：When bus capacitor discharges, main power tube is open-minded；Sequential relationship S is：It is female When line capacitance discharges, main power tube shut-off；If the combination of S3, Two Stages sequential relationship is MS or NR, the carrier phase synchronization of the main power tube of Two Stages Unanimously；If the sequential relationship combination of Two Stages is MR or NS, the carrier phase misphase of the main power tube of Two Stages 180 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510360902.0A CN104980011B (en) | 2015-06-26 | 2015-06-26 | A kind of method for reducing bus capacitor ripple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510360902.0A CN104980011B (en) | 2015-06-26 | 2015-06-26 | A kind of method for reducing bus capacitor ripple |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104980011A CN104980011A (en) | 2015-10-14 |
| CN104980011B true CN104980011B (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510360902.0A Active CN104980011B (en) | 2015-06-26 | 2015-06-26 | A kind of method for reducing bus capacitor ripple |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123367A (en) * | 2006-08-09 | 2008-02-13 | 台达电子工业股份有限公司 | Control method for uninterrupted power supplier |
| CN101741261A (en) * | 2009-09-29 | 2010-06-16 | 杭州士兰微电子股份有限公司 | Control system and control method for frequency interpolation pattern cascading off-line PFC-PWM switch power converter |
| CN102332835A (en) * | 2010-07-12 | 2012-01-25 | 台达电子工业股份有限公司 | Discharge circuit of power supply circuit and active control circuit of discharge circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8098506B2 (en) * | 2009-06-02 | 2012-01-17 | Power Integrations, Inc. | Single-stage power supply with power factor correction and constant current output |
| JP5494618B2 (en) * | 2011-10-28 | 2014-05-21 | 株式会社安川電機 | Power converter |
-
2015
- 2015-06-26 CN CN201510360902.0A patent/CN104980011B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123367A (en) * | 2006-08-09 | 2008-02-13 | 台达电子工业股份有限公司 | Control method for uninterrupted power supplier |
| CN101741261A (en) * | 2009-09-29 | 2010-06-16 | 杭州士兰微电子股份有限公司 | Control system and control method for frequency interpolation pattern cascading off-line PFC-PWM switch power converter |
| CN102332835A (en) * | 2010-07-12 | 2012-01-25 | 台达电子工业股份有限公司 | Discharge circuit of power supply circuit and active control circuit of discharge circuit |
Non-Patent Citations (1)
| Title |
|---|
| C-dump双功能变换器发电运行的工作模式及其电压脉动分析;窦森等;《中国航空学会航空电气工程第三届学术年会论文集》;20011208;第164-169页，正文第4节 * |
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| Publication number | Publication date |
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| CN104980011A (en) | 2015-10-14 |
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