CN1479427A - Bus voltage soft actuating method in uninterrupted power source and its device - Google Patents
Bus voltage soft actuating method in uninterrupted power source and its device Download PDFInfo
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- CN1479427A CN1479427A CNA021346496A CN02134649A CN1479427A CN 1479427 A CN1479427 A CN 1479427A CN A021346496 A CNA021346496 A CN A021346496A CN 02134649 A CN02134649 A CN 02134649A CN 1479427 A CN1479427 A CN 1479427A
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Abstract
Energy of battery through power inversion is transmitted to positive/negative bus line. In charging process, power inverted output voltage is detected as feedback value Controlling signal for driving power inversion circuit makes bus voltage change according to designed rule so as to make bus capacitance be charged according to soft starting rule. After charging is completed, electric power is input to power supply, entering normal working state. 'DC/DC circuit' and 'digital control module' are basic unit of digit controlled UPS without additional parts so as to lower cost and raise reliability. The digit controlled soft starting process can be based on soft starting curve designed smartly in order to reach satisfied soft starting feature and reduce impaction to bus capacitance. Moreover, the invention can test battery and DC/DC circuit.
Description
Technical field:
The present invention relates to uninterrupted power supply (ups) Unity median generatrix voltage soft method and device.
Background technology:
In uninterrupted power supply (ups) Unity, under the civil power normal condition, only when the UPS busbar voltage reaches high value, specified inverter voltage output is arranged.Therefore before the normal output of inverter voltage, energy supplement need be started with realization to dc bus.Because the main effect of bus filter capacitor is storage power and filtering, capacitance is very big, in order to prevent that excessive charging current from impacting to the copper sheet and the bus filter capacitor of the protective tube in the circuit, printed board upward wiring, reduce serviceability, the life-span of device even damage device, therefore need be by someway the bus filter capacitor slowly being charged, Here it is so-called " soft start ", claims again " slow-start ".
The product of the various UPS of having DC bus-bar voltage soft start functions all is to realize soft start function from the power supply of civil power side in the UPS industry.Scheme has following two kinds usually:
1, series thermal-sensitive resistance
Series thermal-sensitive resistance in the charge circuit of bus capacitor utilizes the negative temperature characteristic of thermistor, realizes the soft start function of busbar voltage, as shown in Figure 1.The shortcoming of this scheme is: can only be applied in the small-power occasion.
2, current-limiting resistance adds relay assembly
Series limiting resistor in the charge circuit of bus capacitor, and have relay in parallel with current-limiting resistance.Relay contact disconnects when the busbar voltage soft start, by the current-limiting resistance current limliting bus capacitor is charged; Charging finishes back relay contact adhesive, with the current-limiting resistance short circuit, enters normal operating conditions, as shown in Figure 2.The shortcoming of this scheme is: needs to add current-limiting resistance, not only increased cost, and reliability decrease.
Summary of the invention:
Purpose of the present invention is exactly in order to overcome the above problems, and a kind of uninterrupted power supply median generatrix voltage soft method and device are provided, and reduces cost, and improves reliability.
For achieving the above object, the present invention proposes a kind of uninterrupted power supply median generatrix voltage soft method, comprises the steps: that energy is transferred on the positive and negative busbar through behind the Power Conversion, charges to the bus capacitor soft start; Charging finishes, the energy that provides by civil power through behind the Power Conversion to inverter power supply, enter normal operating conditions, produce inverter voltage output, it is characterized in that: soft start institute energy requirement is provided by battery.
For achieving the above object, the present invention also proposes a kind of uninterrupted power supply median generatrix voltage soft device, comprise the DC/DC circuit, positive and negative busbar, the positive-negative output end of DC/DC circuit is connected on the positive and negative busbar respectively, it is characterized in that also comprising digital control module, described digital control module control DC/DC circuit makes the voltage of positive and negative busbar finish soft start.
Owing to adopted above scheme, by before the normal output of inverter voltage, the energy of battery is carried out Power Conversion to output to and realizes soft start on the dc bus, give inverter power supply by civil power again, used circuit (as " DC/DC circuit " and " digital control module ") is the elementary cell of numerically controlled UPS, and extra the increasing in order to realize soft start function not need not extra components and parts, reduce cost, improved reliability; And numerically controlled soft start-up process flexible design soft start curve as required reaches satisfied soft-start feature, reduces the impact to bus capacitor, has improved reliability.
In addition, because soft start-up process is also directly related with battery performance, in soft start-up process, digital control module can also be judged the performance of battery along band like this.
Description of drawings:
Fig. 1 is a series thermal-sensitive resistor proposal schematic diagram of the prior art.
Fig. 2 is that current-limiting resistance adds relay assembly scheme schematic diagram in the prior art.
Fig. 3 is a soft start scheme schematic diagram of the present invention.
Fig. 4 is application example schematic diagram of the present invention.
Fig. 5 is an example flow diagram of the present invention.
Fig. 6 is the closed-loop control schematic diagram.
Fig. 7 is an open loop control schematic diagram.
Fig. 8 is the soft start curve synoptic diagram of rule anyway
Embodiment:
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
See that Fig. 3 is a soft start scheme schematic diagram of the present invention, wherein, battery cathode is connected with the civil power zero line.The DC/DC circuit is transferred to the energy of battery on the positive and negative busbar through behind the Power Conversion.This circuit is subjected to the control of digital control module.Digital control module detects output voltage as value of feedback, according to the drive signal of certain soft start rule (curve) control DC/DC circuit, busbar voltage is changed according to the rule of design, thereby realize soft start function then.
The major control method of digital control module is: set a given voltage Vref, make it satisfy the soft start rule, make busbar voltage follow the tracks of the shape of Vref by concrete control then, reach the purpose of soft start.Can use closed-loop control, also open loop control, the better effects if of closed-loop control is seen respectively shown in Fig. 6,7.
By the adjustment of digital control algorithm, can realize various soft start curves (being that given voltage Vref satisfies the soft start rule), make busbar voltage reach satisfied soft-start feature, reduce impact to bus capacitor, improve reliability.Possible soft start curve has: straight line, multistage broken line, exponential curve, arc tangent curve etc.Implementation method is to use program control busbar voltage set-point rule over time, then with the value of feedback of busbar voltage as controller, drive signal by certain algorithm decision power circuit makes the real change rule of busbar voltage consistent with the time dependent rule of programme controlled busbar voltage set-point.
For example:, can take linear soft start curve for control algolithm is simple.If the actual busbar voltage Changing Pattern and the straight line of setting do not meet, can judge that then some link breaks down; Take multistage broken line or arc tangent curve, charging rate is very slow in the time of can making bus capacitor voltage very low, thereby reduces the impulse current to the filter capacitor charging.Bus capacitor voltage rises to a certain degree back charging rate rising, is unlikely to oversize with the time span that guarantees whole soft start-up process.Functional requirement difference according to the designer can be selected flexibly.
The present invention not only can realize soft start, can also the performance of battery performance and relevant apparatus be detected.System start-up DC/DC circuit goes the power conversion of battery to bus when the input of UPS civil power is in normal condition, detects the value of positive and negative busbar voltage and cell voltage simultaneously.If the instantaneous value of soft start-up process median generatrix voltage and the difference of the given voltage of soft start are in allowed band, and cell voltage is in the normal variation scope, think that then battery and DC/DC circuit all are in normal condition; Cell voltage drops unusually if soft start-up process median generatrix voltage rises simultaneously, can judge that according to the drop situation battery does not insert or battery performance seriously descends; If unobvious drop of cell voltage and busbar voltage do not have normal ascendant trend in the soft start-up process, can be judged to be the DC/DC circuit and damage, can not finish the power transfer function.Above-mentioned control and arbitration functions are finished by digital control module, thereby have improved the reliability and the intelligent degree of system.Fig. 5 is an example flow diagram of the present invention.
Fig. 4 is the numerically controlled application example of realizing the DC bus-bar voltage soft start function by battery side DC/DC circuit.Wherein, what the DC/DC circuit adopted is the push-pull circuit with the output of two-way secondary, cell voltage is boosted also pass through energy to positive and negative busbar respectively after the DC filtering; Digital control module has adopted DSP, and this chip detects and digital filtering positive and negative busbar voltage Vbus_P, Vbus_N and cell voltage Vbatt by the A/D passage.When soft start began, DSP regulated DC/DC drive signal DRV_P and the DRV_N that exports according to certain algorithm, and positive and negative busbar voltage is risen according to setting rule.In soft start-up process, DSP also judges the state of battery and DC/DC circuit according to certain logic according to the parameter that detects, and draws corresponding logic inferred results, is used for system's control.
The present invention has obtained the confirmation of testing.In an experimental circuit, soft start adopts curve as shown in Figure 8, finishes soft start-up process in 3 seconds, and during with apparatus measures soft start electric current, visible soft start current value is in the designs scope and satisfy the device index request.Need not improve the load current value of device in order to bear excessive impulse current.During with the apparatus measures soft start voltage, the curvilinear motion rule perfect registration of curve and design.If, then can judge the fault of battery or DC/DC circuit etc. according to said method than large deviation.
Claims (10)
1, uninterrupted power supply median generatrix voltage soft method comprises the steps:
Energy is transferred on the positive and negative busbar through behind the Power Conversion, and the bus capacitor soft start is charged;
Charging finishes, the energy that provides by civil power through behind the Power Conversion to inverter power supply, enter normal operating conditions, produce inverter voltage output;
It is characterized in that:
Soft start institute energy requirement is provided by battery.
2, uninterrupted power supply median generatrix voltage soft method as claimed in claim 1, it is characterized in that: in charging process, detect through the output voltage behind the Power Conversion as value of feedback, drive signal according to the soft start rule power controlling translation circuit of setting, busbar voltage is changed according to the rule of design, thereby make the rule charging of bus capacitor by design;
3, uninterrupted power supply median generatrix voltage soft method as claimed in claim 2 is characterized in that: by the detection of positive and negative busbar voltage being realized the state-detection to power conversion circuit.
4, as claim 2 or 3 described uninterrupted power supply median generatrix voltage soft methods, it is characterized in that: also detect the value of cell voltage simultaneously, realize detection battery status.
5, uninterrupted power supply median generatrix voltage soft method as claimed in claim 4 is characterized in that the determination methods of power conversion circuit and battery status is as follows:
If the instantaneous value of soft start-up process median generatrix voltage and the difference of the given voltage of soft start are in allowed band, and cell voltage is in the normal variation scope, think that then battery and power conversion circuit all are in normal condition; Cell voltage drops unusually if soft start-up process median generatrix voltage rises simultaneously, can judge that according to the drop situation battery does not insert or battery performance seriously descends; If unobvious drop of cell voltage and busbar voltage do not have normal ascendant trend in the soft start-up process, can be judged to be power conversion circuit and damage, can not finish the power transfer function.
6, as claim 2 or 3 described uninterrupted power supply median generatrix voltage soft methods, it is characterized in that: described soft start rule is the time dependent rule of busbar voltage set-point, comprises in straight line, multistage broken line, exponential curve, the arc tangent curve any.
7, uninterrupted power supply median generatrix voltage soft device, comprise the DC/DC circuit, positive and negative busbar, the positive-negative output end of DC/DC circuit is connected on the positive and negative busbar respectively, it is characterized in that also comprising digital control module, described digital control module control DC/DC circuit makes the voltage of positive and negative busbar finish soft start.
8, uninterrupted power supply median generatrix voltage soft device as claimed in claim 7 is characterized in that: what the DC/DC circuit adopted is the push-pull circuit with the output of two-way secondary, wherein includes and boosts and the DC filtering device.
9, uninterrupted power supply median generatrix voltage soft device as claimed in claim 7, it is characterized in that: digital control module has adopted digital signal processor, and it detects and digital filtering positive and negative busbar voltage (Vbus_P, Vbus_N) and cell voltage (Vbatt) by the A/D passage; When soft start began, it made positive and negative busbar voltage rise according to setting rule according to the drive signal that is used for control circuit DC/DC circuit (DRV_P, DRV_N) that the algorithm of setting is regulated output.
10, uninterrupted power supply median generatrix voltage soft device as claimed in claim 9, it is characterized in that: also have state judging device in the digital control module, be used in soft start-up process, according to the parameter that detects the state of battery and DC/DC circuit is judged, draw corresponding logic inferred results, be used for system's control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB021346496A CN1322652C (en) | 2002-08-31 | 2002-08-31 | Bus voltage soft actuating method in uninterrupted power source and its device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021346496A CN1322652C (en) | 2002-08-31 | 2002-08-31 | Bus voltage soft actuating method in uninterrupted power source and its device |
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| CN1479427A true CN1479427A (en) | 2004-03-03 |
| CN1322652C CN1322652C (en) | 2007-06-20 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370675C (en) * | 2003-08-29 | 2008-02-20 | 富士电机系统株式会社 | Starting method for power converter |
| CN100409548C (en) * | 2006-05-31 | 2008-08-06 | 武汉大学 | Soft start/stop DC switch power supply and its controlling method |
| CN102497009A (en) * | 2011-12-19 | 2012-06-13 | 广东易事特电源股份有限公司 | Bus soft start circuit of uninterrupted power supply, and method for the same |
| CN101572429B (en) * | 2009-04-27 | 2012-07-04 | 艾默生网络能源有限公司 | UPS system |
| CN101752880B (en) * | 2008-12-04 | 2012-08-22 | 台达电子工业股份有限公司 | Uninterruptible power supply provider |
| CN101685975B (en) * | 2008-09-27 | 2013-02-27 | 力博特公司 | Method and device of soft start of bus voltage in uninterruptible power supply |
| CN104660025A (en) * | 2013-11-20 | 2015-05-27 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Busbar voltage soft starting method of uninterruptible power supply |
| CN104836325A (en) * | 2014-02-12 | 2015-08-12 | 艾默生网络能源有限公司 | Switching control methods of uninterruptible power supply, switching control devices of uninterruptible power supply and uninterruptible power supply system |
| US10693367B1 (en) | 2019-02-19 | 2020-06-23 | Rolls-Royce North American Technologies, Inc. | Pre-charging circuit for power converters |
| US11374400B2 (en) | 2020-12-01 | 2022-06-28 | Rolls-Royce Singapore Pte. Ltd. | Topology of a solid state power controller with two mid-capacitors |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2971568B2 (en) * | 1990-11-30 | 1999-11-08 | 神鋼電機株式会社 | Engine power generator |
| CN1032719C (en) * | 1992-08-20 | 1996-09-04 | 北京铁路局计量管理所 | Logarithmic curve soft start circuit for switching power supply |
| CN2131238Y (en) * | 1992-09-11 | 1993-04-28 | 北京铁路局计量管理所 | In-line uninterrupted power |
-
2002
- 2002-08-31 CN CNB021346496A patent/CN1322652C/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370675C (en) * | 2003-08-29 | 2008-02-20 | 富士电机系统株式会社 | Starting method for power converter |
| CN100409548C (en) * | 2006-05-31 | 2008-08-06 | 武汉大学 | Soft start/stop DC switch power supply and its controlling method |
| CN101685975B (en) * | 2008-09-27 | 2013-02-27 | 力博特公司 | Method and device of soft start of bus voltage in uninterruptible power supply |
| CN101752880B (en) * | 2008-12-04 | 2012-08-22 | 台达电子工业股份有限公司 | Uninterruptible power supply provider |
| CN101572429B (en) * | 2009-04-27 | 2012-07-04 | 艾默生网络能源有限公司 | UPS system |
| CN102497009A (en) * | 2011-12-19 | 2012-06-13 | 广东易事特电源股份有限公司 | Bus soft start circuit of uninterrupted power supply, and method for the same |
| CN104660025A (en) * | 2013-11-20 | 2015-05-27 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Busbar voltage soft starting method of uninterruptible power supply |
| CN104660025B (en) * | 2013-11-20 | 2018-07-31 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | The busbar voltage soft-start method of uninterruptible power supply |
| CN104836325A (en) * | 2014-02-12 | 2015-08-12 | 艾默生网络能源有限公司 | Switching control methods of uninterruptible power supply, switching control devices of uninterruptible power supply and uninterruptible power supply system |
| US10693367B1 (en) | 2019-02-19 | 2020-06-23 | Rolls-Royce North American Technologies, Inc. | Pre-charging circuit for power converters |
| US11374400B2 (en) | 2020-12-01 | 2022-06-28 | Rolls-Royce Singapore Pte. Ltd. | Topology of a solid state power controller with two mid-capacitors |
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|---|---|
| CN1322652C (en) | 2007-06-20 |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: VERTIV TECH Co.,Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: EMERSON NETWORK POWER Co.,Ltd. |
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Effective date of registration: 20201202 Address after: Room 1513-1514, 2 / F, Kechuang City, 17 Huaguoshan Avenue, hi tech Industrial Development Zone, Lianyungang City, Jiangsu Province 222000 Patentee after: Jiangsu Dafa Environmental Protection Technology Co.,Ltd. Address before: 518057 No. 1, FA Lu, Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Patentee before: Vertiv Tech Co.,Ltd. |
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Granted publication date: 20070620 |
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