WO2013004665A2 - Boost converter and operating method therefor - Google Patents
Boost converter and operating method therefor Download PDFInfo
- Publication number
- WO2013004665A2 WO2013004665A2 PCT/EP2012/062847 EP2012062847W WO2013004665A2 WO 2013004665 A2 WO2013004665 A2 WO 2013004665A2 EP 2012062847 W EP2012062847 W EP 2012062847W WO 2013004665 A2 WO2013004665 A2 WO 2013004665A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- converter
- switch
- voltage source
- potential
- input
- Prior art date
Links
- 238000011017 operating method Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 54
- 238000012937 correction Methods 0.000 claims description 6
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC 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
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC 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
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
Definitions
- the invention relates to a boost converter comprising a series circuit having an inductance and a first switch connecting an input potential and a ground potential of the boost converter, a first one
- Capacitance connecting an output potential and a ground potential of the up-converter and a first diode connecting in its flow direction the connection point of the inductor and the first switch to the output potential of the up-converter. Furthermore, the invention relates to a method for operating such a Auf throughwandl he s.
- Step-up converter or up-converter of the type mentioned are known in principle. These are capable of intermittent operation of the first switch in the
- the object of the invention is therefore to provide an improved boost converter, or an improved operating method for this purpose.
- the efficiency should Such a boost converter while limiting the inrush currents can be improved.
- an up-converter of the type mentioned additionally comprising:
- Input potential of the boost converter connects, or
- Input potential of the boost converter connects, wherein the flow direction of the second diode facing in the direction of the input potential, or
- a series circuit comprising a second switch and a second diode which connects the output of the voltage source to the input potential of the up-converter, the flow direction of the second diode facing in the direction of the input potential.
- the first capacitance can be charged with the aid of the aforementioned voltage source even if there is no input voltage at the up-converter,
- the boost converter is not connected to an external power source. This allows the currents in the first capacitor when turning on the boost converter
- auxiliary voltage source Since the said voltage source for the current operation of the up-converter is not absolutely required, it is hereinafter referred to as “auxiliary voltage source” and their voltage as “auxiliary voltage” to the difference to the external or
- the named external or supplying voltage source is therefore also referred to below as the "main voltage source”.
- the first capacitor is always at the voltage of
- Auxiliary voltage source is charged as soon as the capacitor voltage is lower than the auxiliary voltage when the first switch remains open.
- a switch for the precharging of the first capacitor need not necessarily be driven, and it can generally when turning on the up converter to an external main power source to no short circuit come between the main power source and the auxiliary power source.
- the first capacitor can also be charged to a higher voltage than the voltage of the auxiliary voltage source. In this case, energy is always drawn from the auxiliary voltage source by the second diode if its voltage is greater than that of the main voltage source.
- the object of the invention is also achieved by a method of the type mentioned, in which the upwards he wandl connected to the ground potential
- Combination of the second switch with the second diode is the upward Wandl he according to the variant c) particularly flexible and secure.
- the up-converter comprises a resistor which is connected in series with the second switch and / or the second diode. In this way, the current in the first capacitance can be well set when turning on the boost converter to an input voltage.
- the advantage of the invention is particularly apparent here, since the resistor is connected in a branch, which does not worsen the efficiency in the normal operation of the upwards he s s.
- the auxiliary voltage source is designed as an accumulator. In this way, the boost converter does not need to be connected to a separate power source for pre-charging the first capacity, but works completely self-sufficiently. It is also favorable if, instead of the auxiliary voltage source, a second capacitor is provided. This design is largely maintenance-free, since no battery or a
- the second capacitor may be charged during operation of the boost converter with the aid of the input voltage so that the energy is transferred from the second capacitor to the first capacitor at the next switch-on process.
- the up-converter comprises a rectifier whose output is connected between the input potential and the ground potential of the up-converter. In this way, an AC / DC boost converter can be realized.
- a Power Factor Correction (PFC) stage reduces the power draw associated with typical utility networks and is therefore required for many higher performance machines and equipment.
- a typical PFC consists of the parts of said boost converter, through which a sinusoidal current can also be taken from the sinusoidal input voltage. If an electrical device with a conventional PFC is connected to the power grid, it comes to the described surge current in the first capacitor. This surge current can lead to flicker damage in the power network, but above all to the undesired triggering of a safety device. Ultimately, this surge current can also reduce the life of the first capacitor.
- Battery charger in particular integrated in a battery charger for an electric motor vehicle.
- the advantage of the invention is particularly apparent in this device class, since usually very large powers are transmitted and therefore the inrush current in the first capacitor is correspondingly high. Furthermore, the energy saved in this case is particularly large due to the improved efficiency of the up-converter.
- the first capacity is continuously charged by operating the second switch.
- the first capacitor can be constantly charged, so regardless of whether the upward Wandl it is connected to an external main power source or not via the auxiliary voltage source become.
- it does not need to be detected in this case whether the boost converter is connected to a main voltage source or not.
- the first capacitance is charged to an external main voltage source by actuating the second switch before turning on the up-converter.
- the first capacity is only precharged when on
- the first switch is actuated intermittently in order to charge the first capacitor with the aid of the auxiliary voltage source.
- the first switch is actuated intermittently in order to charge the first capacitor with the aid of the auxiliary voltage source.
- Boost converter simply operated with the auxiliary voltage source instead of the main voltage source. In this way, the first capacitor - regardless of the voltage generated by the auxiliary voltage source - can be charged to any value before the input of the up-converter is turned on to an input voltage. High inrush currents in the first capacitor can thus be particularly effectively avoided. If a second switch is provided, it is preferably kept closed when the first switch is operated intermittently.
- the second switch is controlled after charging the first capacitor in an off state. In this way, a short circuit between the
- the first capacitor is charged prior to turning on the up converter to an input voltage to a value that it has during operation of the up converter.
- the first capacitor is charged to an input voltage to a value corresponding to the lower peak, upper peak, or average of the voltage at the first capacitance during operation of the up-converter.
- the first capacitor but also be preloaded to a reduced voltage, resulting in a Reduction of said current when turning on the boost converter to an external main power source leads.
- Capacitor should be preloaded or not. Furthermore, in this way, the turning on of the boost converter to an input voltage can be detected in order to open the second switch in succession. This is particularly advantageous when in
- the inventive method can be performed by a controller, which is not necessarily part of the up converter.
- the controller may be part of a software that runs away from the up-converter and also performs other tasks.
- this control can also be implemented in hardware.
- Figure 2 shows an up-converter with auxiliary voltage source and second switch;
- Figure 3 as Figure 2 only without a rectifier at the input of the boost converter;
- FIG. 4 shows an upward wall with auxiliary voltage source and second diode
- FIG. 5 shows an upward converter with auxiliary voltage source, second switch and second
- FIG. 7 shows an upward wall with a second capacity instead of the second one
- FIG 8 is a block diagram of an OBC (On Board Charger).
- FIG. 1 shows an up-converter of a type known per se, comprising:
- a first capacitance Cl which is an output potential and a ground potential of the
- Upward converter connects and
- Inductance L and the first switch Sl connects to the output potential of the boost converter.
- an optional rectifier G is also provided whose output is connected between the input potential and the ground potential of the up converter.
- an AC / DC boost converter can be realized, which consists of the rectified input voltage between the input potential and the
- the first switch Sl is alternately closed and opened. If the first switch S1 is closed, then a current is generated in the inductance L which, when the switch S1 is open, inevitably flows over the first capacitance C1 and this charging. If the rectifier G is omitted, a DC / DC boost converter based on the same principle of operation can be realized.
- FIG. 2 now shows an upward wall 1a corresponding to the upward wall of FIG. 1, additionally having one connected to the ground potential
- the voltage source V which may be formed for example as a battery or accumulator, a voltage at the first capacitor Cl can now be generated even if the input of the up-converter la is open and thus there is no
- the first capacitor C1 can be slowly charged to the voltage of the voltage source V.
- the circuit formed from the voltage source V, the first switch Sl, the second switch S2, the inductance L, the first diode Dl and the first capacitor Cl is operated as an upward converter.
- the first switch S1 is alternately closed and opened when the second switch S2 is closed, that is, operated intermittently. If the first switch S1 is closed, then a current is generated in the inductance L which, when the switch S1 is open, inevitably flows over the first capacitance C1 and charges it.
- the first capacitor Cl can be charged to an arbitrary value before the input of the up-converter la is connected to an external (main) voltage source (not shown), that is, an input voltage is applied to the up-converter la. High inrush currents in the first capacitor Cl can thus be effectively avoided.
- the first capacitor Cl is charged by means of the second switch S2 to the same voltage, which it has during operation, so that an increased current in the first capacitor Cl when turning on the Auf problemwandl he la to an external
- the first capacitance C1 may be pre-charged to a value corresponding to the lower peak value, the upper peak value or the mean value of the voltage at the first capacitance C1 during the operation of the up-conversion circuit 1a before the turn-on converter is switched on.
- the voltage at the first capacitance Cl is measured, and the charging process of the same is terminated when said voltage has reached a predeterminable value.
- the second switch S2 must be opened at any rate when turning on the up converter la to an external voltage source, otherwise there is a short circuit between the supplying
- Fig. 3 now shows an up-converter lb, which is constructed identically as the
- the up-converter therefore, acts as a DC / DC up converter, whereas the up-converter acts as an AC / DC up-converter.
- Fig. 4 now shows an upwardly he lc, which is constructed similar to the
- Input potential of the up-converter lc connects, wherein the flow direction of the second diode D2 points in the direction of the input potential. That way, the first one becomes
- Capacitor Cl is always charged to the voltage of voltage source V as soon as its voltage is lower than that (assuming ideal diodes D1 and D2).
- a switch for the precharging of the first capacitor Cl need not be controlled, and it can when turning on the up converter lc to an external voltage source and no short circuit between the supplying voltage source and the
- the first switch S1 as explained above, can be driven intermittently as shown in FIG. 2 in order to charge the first capacitor C1 to an arbitrary voltage value.
- Fig. 5 now shows an upward Wandl ld, which a mixture of the
- the voltage source V with a Series circuit comprising a second switch S2 and a second diode D2, connected to the input potential of the up-converter ld, wherein the flow direction of the second diode D2 points in the direction of the input potential.
- the first capacitor Cl can be charged by intermittently operating the first switch Sl again to any value before the input of the up-converter ld is connected to an external voltage source.
- the said flexibility is particularly useful when the first switch Sl and the second switch S2 are actuated by independent controls or regulations. For example, it is conceivable that an existing boost converter should be extended by the measures according to the invention. Because of the second switch S2, the charging process of the first capacitor C1 can also be interrupted or interrupted without influencing the first switch S1.
- the first capacitor C1 is charged via the second switch S2 only when the up-converter ld is not connected to an external voltage source.
- the current and / or the voltage at the input of the up-converter ld can be determined. Because of the second diode D2 but it is also possible, the first capacitor Cl constantly, so regardless of whether the
- Up converter ld is connected to an external power source or not to charge via the voltage source V.
- it does not need to be detected in this case whether the boost converter ld is connected to an external voltage source or not.
- Fig. 6 now shows an up-converter le, which is constructed similar to the
- Fig. 7 now shows an upward Wandl he lf, which in turn is similar in structure to the up-converter ld of FIG. 5. Instead of the voltage source V but a second capacitance C2 is provided in this case. This can be charged at any time using a voltage source, not shown, and then can deliver their energy to the first capacitor Cl.
- OBC On-Board Charger integrated in an electric vehicle
- line filter 2 arranged at the input E
- PFC Power Factor Correction stage
- DC link capacitor 4 connected thereto
- DC / DC DC connected thereto
- DC converter 5 as well as a connected and at the output A
- the up-converter la .. lf shown in the figures is designed as a power factor correction stage.
- a Power Factor Correction stage reduces the disruption of energy extraction from typical utility networks and is therefore mandatory for many higher performance machines and equipment.
- a typical PFC consists of the parts of said boost converter, through which the sinusoidal
- Input voltage can also be taken from a sinusoidal current. If an electrical device with a conventional PFC is connected to the power grid, it comes to the described surge current in the first capacitor. This surge current can too
- the up-converter 10 illustrated in the figures is integrated in a battery charger, in particular in a battery charger for an electric motor vehicle.
- the absolutely saved energy is particularly large due to the improved efficiency of the boost converter la. Lf.
- a second capacitance C2 (see FIG. 7) can be charged via the electrical system of the motor vehicle.
- the up-converter la .. lf can also have a control, not shown, for implementing the method according to the invention.
- Control can be designed in software and / or hardware. Furthermore, the control can also be remote from the upside down he la .. lf be and / or be part of a higher-level control, which also performs other tasks. Finally, it is stated that the variants shown in the figures can be combined as desired.
- the up-converter le from FIG. 6 may comprise a rectifier G.
- the up-converter ld from FIG. 5 comprises a second capacitor C2 instead of the voltage source V. It is thus easy for the person skilled in the art to adapt the teaching disclosed here to his needs.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112012002822.8T DE112012002822A5 (en) | 2011-07-07 | 2012-07-02 | Up-converter and operating method for this |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161505332P | 2011-07-07 | 2011-07-07 | |
US61/505,332 | 2011-07-07 | ||
DE102011114331.2 | 2011-09-24 | ||
DE201110114331 DE102011114331A1 (en) | 2011-09-24 | 2011-09-24 | Up-converter and operating method for this |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2013004665A2 true WO2013004665A2 (en) | 2013-01-10 |
WO2013004665A3 WO2013004665A3 (en) | 2013-03-21 |
Family
ID=47437501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/062847 WO2013004665A2 (en) | 2011-07-07 | 2012-07-02 | Boost converter and operating method therefor |
Country Status (2)
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DE (2) | DE102011114331A1 (en) |
WO (1) | WO2013004665A2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009032259A1 (en) | 2009-07-08 | 2011-01-13 | Siemens Aktiengesellschaft | Switch mode power supply comprises buffer capacitor and inrush current limiter, where electric switch is arranged in current path of buffer capacitor, and electric switch is provided as short-circuiting switch |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4149415B2 (en) * | 2004-05-31 | 2008-09-10 | 株式会社ケーヒン | Boost power supply control device and failure site identification method for boost power supply control device |
US7355368B2 (en) * | 2004-08-12 | 2008-04-08 | International Rectifier Corporation | Efficient in-rush current limiting circuit with dual gated bidirectional hemts |
JP4552904B2 (en) * | 2006-06-23 | 2010-09-29 | トヨタ自動車株式会社 | Vehicle power supply device and vehicle equipped with the same |
DE102009012928A1 (en) * | 2009-03-12 | 2010-09-16 | Kostal Industrie Elektrik Gmbh | Energy conversion system |
DE102009037859B4 (en) * | 2009-08-18 | 2017-02-23 | Fujitsu Technology Solutions Intellectual Property Gmbh | Input circuit for an electrical device, use of an input circuit and electrical device |
-
2011
- 2011-09-24 DE DE201110114331 patent/DE102011114331A1/en not_active Withdrawn
-
2012
- 2012-07-02 WO PCT/EP2012/062847 patent/WO2013004665A2/en active Application Filing
- 2012-07-02 DE DE112012002822.8T patent/DE112012002822A5/en not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009032259A1 (en) | 2009-07-08 | 2011-01-13 | Siemens Aktiengesellschaft | Switch mode power supply comprises buffer capacitor and inrush current limiter, where electric switch is arranged in current path of buffer capacitor, and electric switch is provided as short-circuiting switch |
Also Published As
Publication number | Publication date |
---|---|
DE102011114331A1 (en) | 2013-03-28 |
WO2013004665A3 (en) | 2013-03-21 |
DE112012002822A5 (en) | 2014-03-27 |
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