CN105656332A - Method for supplying power to low-voltage system by using rectification dead zone - Google Patents
Method for supplying power to low-voltage system by using rectification dead zone Download PDFInfo
- Publication number
- CN105656332A CN105656332A CN201610208578.5A CN201610208578A CN105656332A CN 105656332 A CN105656332 A CN 105656332A CN 201610208578 A CN201610208578 A CN 201610208578A CN 105656332 A CN105656332 A CN 105656332A
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- China
- Prior art keywords
- voltage
- low
- voltage system
- rectification
- dead band
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a method for supplying power to a low-voltage system by using a rectification dead zone. The power is input into a microprocessor through zero-cross detection, the time of two zero-cross points is detected, the grid frequency is calculated, the minimum voltage after filtering is calculated with the formula shown in the specification according to the magnitude of a circuit filter capacitor, the phase angle of the minimum voltage is inversely calculated according to the circuit requirement with the formula Uu=Um*sin(omega t+phi), and the microprocessor sends a switching signal through IO to turn on a switch to charge the low-voltage system in the period from maximum voltage Umax to minimum voltage Umin. With the adoption of the method, power is supplied to the low-voltage system by using the dead zone, the space and the cost are greatly saved, and the power factor of a product is effectively increased.
Description
Technical field
The present invention relates to a kind of method of supplying power to, specifically a kind of utilize the method that rectification dead band is low-voltage power supply.
Background technology
Based on the electric circuit characteristic of low power factor, voltage rectification post filtering electric capacity is when low voltage, it is in discharge condition, now input voltage is lower than the voltage at electric capacity two ends, the present invention utilizes this dead zone voltage to power to low-voltage system, greatly save space and cost, and the power factor of product is effectively provided.
Summary of the invention
It is an object of the invention to provide and a kind of utilize the method that rectification dead band is low-voltage power supply, to solve in above-mentioned background technology the problem proposed.
For achieving the above object, the present invention provides following technical scheme:
Utilize the method that rectification dead band is low-voltage power supply, by zero passage detection input microprocessor, detect the time that two are crossed zero point, calculate electrical network frequency, according to the size formula of circuit filtering electric capacityCalculate filtered minimum voltage, with formula Uu=Um*sin (�� t+ ��), inverse is needed to go out the phase angle of minimum voltage according to circuit, from maximum voltage Umax to minimum voltage U min, this section of time microprocessor sends switch signal by IO and opens switch and charge to low-voltage system.
As the present invention's further scheme: utilize the process that filter capacitor discharges, input voltage was powered to low-voltage system lower than the voltage at electric capacity two ends, the input voltage dead band time.
Compared with prior art, the invention has the beneficial effects as follows: the present invention utilizes this dead zone voltage to power to low-voltage system, greatly saves space and cost, and the power factor of product is effectively provided.
Accompanying drawing explanation
Fig. 1 utilizes the process utilizing filter capacitor to discharge in method that rectification dead band is low-voltage power supply;
Fig. 2 is the schematic circuit utilizing method that rectification dead band is low-voltage power supply.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 ~ 2, in the embodiment of the present invention, a kind of utilize the method that rectification dead band is low-voltage power supply, by zero passage detection input microprocessor, detect the time that two are crossed zero points, calculate electrical network frequency, according to the size formula of circuit filtering electric capacityCalculate filtered minimum voltage, with formula Uu=Um*sin (�� t+ ��), inverse is needed to go out the phase angle of minimum voltage according to circuit, from maximum voltage Umax to minimum voltage U min, this section of time microprocessor sends switch signal by IO and opens switch and charge to low-voltage system, is increased in the load of voltage low side by this method, reduces the phase differential of voltage and electric current, thus improve following of received current, it is to increase the power factor of circuit;Utilizing the process that filter capacitor discharges, input voltage was powered to low-voltage system lower than the voltage at electric capacity two ends, the input voltage dead band time, reduced the phase differential of voltage and electric current, thus improved the power factor of complete machine.
To those skilled in the art, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit or the essential characteristic of the present invention, it is possible to realize the present invention in other specific forms. Therefore, no matter from which point, embodiment all should be regarded as exemplary, and right and wrong are restrictive, the scope of the present invention is limited by claims instead of above-mentioned explanation, it is intended that all changes in the implication of the equivalent important document dropping on claim and scope included in the present invention. Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, it is to be understood that, although this specification sheets is described according to enforcement mode, but not each enforcement mode only comprises an independent technical scheme, this kind of narrating mode of specification sheets is only for clarity sake, those skilled in the art should by specification sheets integrally, and the technical scheme in each embodiment through appropriately combined, can also form other enforcement modes that it will be appreciated by those skilled in the art that.
Claims (2)
1. one kind utilizes the method that rectification dead band is low-voltage power supply, it is characterised in that, by zero passage detection input microprocessor, detect the time that two are crossed zero point, calculate electrical network frequency, according to the size formula of circuit filtering electric capacityCalculate filtered minimum voltage, with formula Uu=Um*sin (�� t+ ��), inverse is needed to go out the phase angle of minimum voltage according to circuit, from maximum voltage Umax to minimum voltage U min, this section of time microprocessor sends switch signal by IO and opens switch and charge to low-voltage system.
2. according to claim 1 utilize the method that rectification dead band is low-voltage power supply, it is characterised in that, utilize the process that filter capacitor discharges, input voltage was powered to low-voltage system lower than the voltage at electric capacity two ends, the input voltage dead band time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208578.5A CN105656332B (en) | 2016-04-06 | 2016-04-06 | A method of using rectification dead zone be low-voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208578.5A CN105656332B (en) | 2016-04-06 | 2016-04-06 | A method of using rectification dead zone be low-voltage power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105656332A true CN105656332A (en) | 2016-06-08 |
| CN105656332B CN105656332B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610208578.5A Active CN105656332B (en) | 2016-04-06 | 2016-04-06 | A method of using rectification dead zone be low-voltage power supply |
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| CN (1) | CN105656332B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021168831A1 (en) * | 2020-02-28 | 2021-09-02 | Astec International Limited | Power measurements in switched mode power supplies |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2336504Y (en) * | 1998-03-02 | 1999-09-01 | 哈尔滨蓝波高技术开发有限公司 | Automatic dynamic reactive compensation arrangement |
| CN102081116A (en) * | 2009-12-01 | 2011-06-01 | 广芯电子技术(上海)有限公司 | Adaptive digital method for detecting zero crossing point of alternating voltage |
| CN102288814A (en) * | 2011-08-03 | 2011-12-21 | 苏州大学 | Real-time detection method for voltage dip |
| JP2013066274A (en) * | 2011-09-16 | 2013-04-11 | Diamond Electric Mfg Co Ltd | Power supply circuit |
| US20130188398A1 (en) * | 2007-11-16 | 2013-07-25 | Itron, Inc. | Devices and methods for converting alternating current (ac) power to direct current (dc) power |
| CN103872914A (en) * | 2012-12-11 | 2014-06-18 | 三垦电气株式会社 | Control circuit of switching power supply device |
-
2016
- 2016-04-06 CN CN201610208578.5A patent/CN105656332B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2336504Y (en) * | 1998-03-02 | 1999-09-01 | 哈尔滨蓝波高技术开发有限公司 | Automatic dynamic reactive compensation arrangement |
| US20130188398A1 (en) * | 2007-11-16 | 2013-07-25 | Itron, Inc. | Devices and methods for converting alternating current (ac) power to direct current (dc) power |
| CN102081116A (en) * | 2009-12-01 | 2011-06-01 | 广芯电子技术(上海)有限公司 | Adaptive digital method for detecting zero crossing point of alternating voltage |
| CN102288814A (en) * | 2011-08-03 | 2011-12-21 | 苏州大学 | Real-time detection method for voltage dip |
| JP2013066274A (en) * | 2011-09-16 | 2013-04-11 | Diamond Electric Mfg Co Ltd | Power supply circuit |
| CN103872914A (en) * | 2012-12-11 | 2014-06-18 | 三垦电气株式会社 | Control circuit of switching power supply device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021168831A1 (en) * | 2020-02-28 | 2021-09-02 | Astec International Limited | Power measurements in switched mode power supplies |
| US11349387B2 (en) | 2020-02-28 | 2022-05-31 | Astec International Limited | Power measurements in switched mode power supplies |
| US11716016B2 (en) | 2020-02-28 | 2023-08-01 | Astec International Limited | Power measurements in switched mode power supplies |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105656332B (en) | 2018-08-21 |
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Effective date of registration: 20210622 Address after: 201203 Building 2, 439 Chunxiao Road, Pudong New Area pilot Free Trade Zone, Shanghai Patentee after: SHANGHAI SINOMCU MICROELECTRONICS Co.,Ltd. Address before: Room 345, block B, building 1, 977 Shangfeng Road, Pudong New Area, Shanghai, 200120 Patentee before: SHANGHAI SINO-SAGE INTELLIGENT TECHNOLOGY Co.,Ltd. |
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