WO2015051971A1 - Method for operating a load connected to a motor vehicle electrical system - Google Patents

Method for operating a load connected to a motor vehicle electrical system Download PDF

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Publication number
WO2015051971A1
WO2015051971A1 PCT/EP2014/069434 EP2014069434W WO2015051971A1 WO 2015051971 A1 WO2015051971 A1 WO 2015051971A1 EP 2014069434 W EP2014069434 W EP 2014069434W WO 2015051971 A1 WO2015051971 A1 WO 2015051971A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
threshold
ue
input voltage
voltage
Prior art date
Application number
PCT/EP2014/069434
Other languages
German (de)
French (fr)
Inventor
Tobias Schuhmacher
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102013220529.5 priority Critical
Priority to DE201310220529 priority patent/DE102013220529A1/en
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2015051971A1 publication Critical patent/WO2015051971A1/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion 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
    • H02M3/145Conversion 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
    • H02M3/155Conversion 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
    • H02M3/156Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/14Arrangements for reducing ripples from dc input or output
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M2001/0003Details of control, feedback and regulation circuits
    • H02M2001/0009Devices and circuits for detecting current in a converter
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M2001/0003Details of control, feedback and regulation circuits
    • H02M2001/0016Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameter
    • H02M2001/0022Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameter the disturbance parameter being input voltage fluctuations

Abstract

The invention relates to a method for operating a load (12) connected to a motor vehicle electrical system (18) using a step-up converter (14). An input voltage (Ue) of the step-up converter (14) is ascertained, and a current (I) flowing from an output capacitor (42) and a valve (36) of the step-up converter (14) is ascertained. The valve (36) is opened or closed depending on the current (I) and depending on the input voltage (Ue).

Description

Description Title

A method of operating a load on a motor vehicle on-board network prior art

The invention relates to a method for operating a load on a motor vehicle electrical system by means of a boost converter according to the preamble of claim 1.

Step-up converters are generally known and serve to elevate their input voltage to a desired output voltage end level.

From DE 103 53 835 A1 a method for operating a

Step-up converter is known in which the activation and deactivation of a

Takes place switching element of the boost converter in accordance with a predetermined duty cycle the size of which is in response set to the operating situation of at least one of the components of the boost converter during the current operating mode or varied.

Disclosure of the Invention

The problem of the invention is achieved underlying according to Claim. 1 Advantageous developments are specified in the dependent claims. For the invention, important features are found also in the following description and in the drawings, the features of both in

, Alone and in various combinations for the invention may be important without then again it is explicitly stated.

A valve of the boost converter is closed in response to a first and a second current threshold or opened. Characterized in that at least one of the two current threshold values ​​as a function of an input voltage of the boost converter is determined, the

Input voltage used as a reference variable. This makes it possible compared to fixed preset current thresholds greater

to achieve output power at a reduced input voltage. In addition, at an elevated input voltage, the power loss can be limited.

Characterized in that a distance between a first and second

Current threshold remains the same or is reduced when the input voltage drops, must especially at low input voltage no high

be passed through inrush current, in particular, the EMC emissions significantly improved (EMC: electromagnetic compatibility).

Further features, application possibilities and advantages of the invention will become apparent from the following description of embodiments of the invention, which are illustrated in the figures of the drawing. All the features described or depicted, or in any combination form the subject of the invention, regardless of your

Summary in the claims or their back-reference and regardless of their formulation or the description or illustrations in the drawing. It will be for

functionally equivalent sizes, and features using the same reference numerals in all the figures, even with different embodiments.

Hereinafter, exemplary embodiments of the invention with reference to the drawings will be explained. In the drawing:

1 shows a circuit diagram of a circuit for controlling a consumer;

Figure 2 shows a schematic view of a control device of a boost converter; and

characters

3 to 6 are each a schematic current / input voltage-time diagram. 1 shows a circuit diagram of a circuit 10 for driving a

Consumer 12, in particular a solenoid (not further shown) and in particular (not shown further) electromagnetic

Actuator for an injection valve (not shown) of a

Internal combustion engine (not shown).

A DC-DC converter 14 ( "current controlled boost converter", "boost converter") is fed to an input 16 of a DC voltage source 18 with an input voltage Vin and generates therefrom at an output 20 an output voltage Ua, which at least at times higher than the

is input voltage Ue. The DC voltage source 18 sets

Motor vehicle electrical system. The input voltage Vin is measured by a voltage measuring device 19, which outputs its signal to the measuring terminal 21.

Furthermore, the DC-DC converter 14 in a lower area in the drawing, a base terminal 24 which is presently connected via a current measuring resistor 26 to a reference potential 28th In the present case the second reference potential 28 is a ground potential GND. In parallel with the current sensing resistor 26 a voltage measuring device 30a is connected, which outputs its signal to the measuring port 31st Via the terminal 31, a current I flowing through the current sensing resistor 26, or an equivalent measure can be determined.

At the input 16 of the DC-DC converter 14, a filter capacitor 32 is connected to the second reference potential 28th Further, the input 16 to a first terminal (no reference numeral) of a converting inductor 34 is connected. A second terminal (not numbered) of the

Converting inductor 34 is connected to a D-terminal ( "drain") of a switching transistor 36 and the anode terminal of a diode 38 is connected. In the present case, the switching transistor 36 as a MOSFET (MOSFET, English "metal-oxide-semiconductor field-effect transistor") is executed. The switching transistor 36 is commonly referred to as a valve. An S-terminal ( "source") of the switching transistor 36 is connected to the base terminal 24 of the DC-DC converter fourteenth A G terminal 40 ( "gate") of the switching transistor 36 is connected to a not shown in the figure 1

Control unit for controlling the DC-DC converter 14 is connected. A cathode terminal of the diode 38 is connected to the output 20 and a first

Terminal of an output capacitor 42 is connected. A second terminal of the capacitor 42 is connected to the base terminal 24th The current I through the resistor 26 flows from the output capacitor 42 and from the valve 36th

Ua a difference of the output voltage and the reference potential 28 corresponds to a presently generated by the DC-DC converter 14 operating voltage for the control of the consumer 12th

Figure 2 shows a schematic block diagram of the control unit 44 for connection to the terminals 21, 31 and 40 of Figure 1. By means of the terminal 21 can detect the input voltage Ue, the controller 44th Via the terminal 31, the controller 44 can detect the flowing of the valve 36 and the output capacitor current I 42. Depending on the current I and the input voltage Vin, the valve 36 is opened via connection 40 or closed. Of course, the method shown and performed, by an unspecified

Ua voltage regulation, that is, a regulation of the output voltage, superimposed.

Figure 3 shows a schematic current / Eingangsspanungs-time diagram 46. There are three different time periods T1 to T3 shown. In schematic form, a voltage waveform 48 is shown. In the periods T1 to T3 are associated current waveforms 50, 52 and 54. The current and voltage profiles shown in Figures 3 to 6 are only schematically and by way of example and are in particular not limited to the shown timing

limited. Rather, in response to the value of the input voltage Ue at least one current threshold la, Ib is changed. Starting from the current waveform is 52 toward the current path 50, the first

1 la current threshold increased to the first threshold current Ia2 and Ib2 of the second current threshold to the second threshold current Ib3

increased, when the input voltage Vin falls below a first

Voltage threshold Uea decreases.

Starting from the current course 52 towards the current path 54 of the first current threshold la 1 is increased to the first threshold current Ia2 and the second current threshold lowered Ib2 to the second current threshold value Ib1, when the input voltage Vin exceeds a second voltage threshold Ueb.

Figure 4 shows a further schematic diagram 56 with current waveforms 58, 60 and 62. In contrast to FIG 3, the second threshold current Ib to the input voltage Vin remains constant. extending the basis of the current path 60 toward the flow 58 of the first current threshold value Ia2 at first

Ia3 increased current threshold, when the input voltage Vin decreases below the first voltage threshold Uea. Starting from the current course 60 towards the current path 62 of the first current threshold Ia2 is lowered to the first threshold current Ia3, when the input voltage exceeds the second voltage threshold value Ue Ueb.

Figure 5 shows a schematic diagram of 64 with current waveforms 66, 68 and 70. The first current threshold la remains constant over the input voltage Ue. The second current threshold value Ib2 is increased starting from the current course 68 towards the current path 66 to the second current threshold Ib3, when the input voltage Vin decreases below the first voltage threshold Uea.

Proceeding toward the current path 70 of the second current threshold is reduced to the second threshold current Ib1 Ib2 of the current path 68, when the input voltage exceeds the second voltage threshold value Ue Ueb.

Figure 6 shows a further schematic diagram 72 with current waveforms 74, 76 and 78. Starting from the current course 76 towards the current path 74 of the second current threshold value Ib2 to the input voltage Vin is constant, and the first current threshold la 1 is increased to the first threshold current Ia2, when the input voltage Vin below the first

Voltage threshold Uea decreases.

Starting from the current course 76 towards the current path 78 of the first current threshold Ia1 to the input voltage Vin is constant, and the second

Threshold current Ib2 is decreased to the second threshold current Ib1, when the input voltage exceeds the second voltage threshold value Ue Ueb. The change of the current threshold values ​​Ia and Ib was preceding the

Figures 4 to 6, starting from the time domain T2 described.

Of course, the change of the current threshold values ​​Ia and Ib can also be prepared starting from the time ranges T1 and T3 in each case toward the

Time range T2 describe.

Claims

claims
1 . A method of operating a load (12) to an automotive vehicle electrical system (18) by means of a boost converter (14), wherein a
Input voltage (Ue) of the boost converter (14) is determined, characterized in that from an output capacitor (42) and a valve (36) of the boost converter (14) outflowing current (I) is determined, and that the valve (36) in function of the current (I) and in
is opened depending on the input voltage (Ue) or closed.
, (La) reached 2. The method of claim 1, wherein the valve (36) is closed when the current (I) comprises a first current threshold or falls, the valve (36) is opened when the current (I) a second current threshold (Ib) reaches or exceeds, and wherein the first current threshold value (la) and / or the second current threshold value (Ib) in
Depending on the input voltage (Ue) is determined.
3. The method of claim 2, wherein the first threshold current (la) and / or the second threshold current (Ib) is increased when the
Input voltage (Ue) falls, and / or wherein the first threshold current (la) and / or the second threshold current (Ib) is reduced when the input voltage (Ue) increases.
4. The method of claim 2 or 3, wherein a distance between the first and second current threshold (la, lb) remains the same or is reduced when the input voltage (Ue) falls.
5. The method according to any one of claims 2 to 4, wherein the first
Current threshold value (la) is a lower current threshold, and wherein said second current threshold (Ib), an upper current threshold, which is greater than the first threshold current (la).
6. The method according to any one of claims 2 to 5, wherein the first
Current threshold value (Ia1, Ia2) is increased and the second
Threshold current (Ib2, Ib3) is increased, when the input voltage (Ue) falls below a first voltage threshold (Uea) decreases, and wherein the first current threshold value (Ia1, Ia2) is increased and the second
Threshold current (Ib2, Ib1) is lowered, when the input voltage (Ue) a second voltage threshold (IIb) exceeds.
7. The method of claim 6, wherein the first threshold current (la) and the second current threshold value (Ib) to be raised such as the
Input voltage (Ue) to the first voltage threshold (Uea) decreases, that the distance between the first and second
Current threshold value (Ia1, Ib2; Ia2, Ib3) remains substantially the same.
A method according to claim 6 or 7, wherein said first current threshold value (la) is set up in such a way and the second threshold current (Ib) is reduced in such a way when the input voltage (Ue) a second
Threshold voltage (Ub) exceeds that of the distance between the first and the second current threshold value (Ia1, Ib2, Ia2, Ib1) is reduced.
A method according to any one of claims 2 to 5, wherein the second
Threshold current (Ib) to the input voltage (Ue) remains constant, and the first current threshold value (Ia2, Ia3) is increased when the
Input voltage (Ue) falls below a first voltage threshold (Uea) decreases, and wherein the second threshold current (Ib) over the
Input voltage (Ue) remains constant, and the first current threshold value (Ia2, Ia1) is lowered, when the input voltage (Ue) a second voltage threshold (IIb) exceeds. 10. The method according to any one of claims 2 to 5, wherein the first
Threshold current (la) to the input voltage (Ue) remains constant, and the second threshold current (Ib2, Ib3) is increased when the
Input voltage (Ue) falls below a first voltage threshold (Uea) decreases, and wherein the first current threshold value (Ia) over the
Input voltage (Ue) remains constant, and the second current threshold
(Ib2, Ib1) is lowered, when the input voltage (Ue) a second voltage threshold (IIb) exceeds.
1. 1 A method according to any one of claims 2 to 5, wherein the second
Threshold current (Ib2) to the input voltage (Ue) remains constant, and the first current threshold value (Ia1, Ia2) is increased when the
Input voltage (Ue) falls below a first voltage threshold (Uea) decreases, and wherein the first current wave value (Ia1) to the input voltage (Ue) remains constant, and the second threshold current (Ib2, Ib1) is lowered, when the input voltage (Ue) a second current threshold (iib) exceeds.
12. The method according to any one of the preceding claims, wherein the load (12) is an electromagnetic actuator for an injection valve of an internal combustion engine.
13. execute computer program for a digital computing device which is designed to perform a method according to any one of claims 1 to 12th
14. Control device (44) for operation of a boost converter (14), in particular a motor vehicle, which is provided with a digital computing device, in particular a microprocessor, on which a computer program according to claim 13 runs.
15. Storage medium for a control unit (44) according to claim 14, on which a computer program of claim 13 stored.
PCT/EP2014/069434 2013-10-11 2014-09-11 Method for operating a load connected to a motor vehicle electrical system WO2015051971A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102013220529.5 2013-10-11
DE201310220529 DE102013220529A1 (en) 2013-10-11 2013-10-11 A method of operating a load on a motor vehicle on-board network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020167012302A KR20160068918A (en) 2013-10-11 2014-09-11 Method for operating a load connected to a motor vehicle electrical system
CN201480055877.9A CN105637747B (en) 2013-10-11 2014-09-11 Method for the operation load at motor vehicle power grid

Publications (1)

Publication Number Publication Date
WO2015051971A1 true WO2015051971A1 (en) 2015-04-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/069434 WO2015051971A1 (en) 2013-10-11 2014-09-11 Method for operating a load connected to a motor vehicle electrical system

Country Status (4)

Country Link
KR (1) KR20160068918A (en)
CN (1) CN105637747B (en)
DE (1) DE102013220529A1 (en)
WO (1) WO2015051971A1 (en)

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EP1198058A1 (en) * 2000-03-27 2002-04-17 Mitsubishi Denki Kabushiki Kaisha Single-phase converter, converter and refrigeration cycle device
US20060006852A1 (en) * 2004-07-07 2006-01-12 Takeshi Mashiko DC-DC converter circuit
US20100079125A1 (en) * 2008-07-25 2010-04-01 Melanson John L Current sensing in a switching power converter
US20110254524A1 (en) * 2009-10-01 2011-10-20 Panasonic Corporation Current driver circuit
US20130207632A1 (en) * 2012-02-13 2013-08-15 Gurjit Singh THANDI System and method for improved line transient response in current mode boost converters

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Publication number Priority date Publication date Assignee Title
DE10353835A1 (en) 2003-11-18 2005-06-16 Robert Bosch Gmbh A method of operating a boost converter
CN101944849B (en) * 2010-07-23 2013-09-04 深圳市振邦实业有限公司 Low-EMI booster circuit and device using same
US20120139514A1 (en) * 2010-12-07 2012-06-07 Eaton Corporation Switch-mode power supply with enhanced current source capability
CN102323841B (en) * 2011-05-06 2013-10-23 矽力杰半导体技术(杭州)有限公司 Current hysteresis control circuit, current hysteresis control method and direct current-direct current converter applying both of same
CN102355130A (en) * 2011-10-09 2012-02-15 南通大学 Double-tube Buck-Boost type PFC (Power Factor Correction) converter based on one-cycle control
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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1198058A1 (en) * 2000-03-27 2002-04-17 Mitsubishi Denki Kabushiki Kaisha Single-phase converter, converter and refrigeration cycle device
US20060006852A1 (en) * 2004-07-07 2006-01-12 Takeshi Mashiko DC-DC converter circuit
US20100079125A1 (en) * 2008-07-25 2010-04-01 Melanson John L Current sensing in a switching power converter
US20110254524A1 (en) * 2009-10-01 2011-10-20 Panasonic Corporation Current driver circuit
US20130207632A1 (en) * 2012-02-13 2013-08-15 Gurjit Singh THANDI System and method for improved line transient response in current mode boost converters

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
H.P. FORGHANI-ZADEH ET AL: "Current-sensing techniques for DC-DC converters", THE 2002 45TH MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, 2002. MWSCAS-2002., vol. 2, 1 January 2002 (2002-01-01), pages II - 577, XP055110402, ISBN: 978-0-78-037523-9, DOI: 10.1109/MWSCAS.2002.1186927 *

Also Published As

Publication number Publication date
CN105637747A (en) 2016-06-01
DE102013220529A1 (en) 2015-04-16
KR20160068918A (en) 2016-06-15
CN105637747B (en) 2019-01-04

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