KR101207716B1 - Battery charger for a vehicle with wide output voltage range - Google Patents
Battery charger for a vehicle with wide output voltage range Download PDFInfo
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- KR101207716B1 KR101207716B1 KR1020100051603A KR20100051603A KR101207716B1 KR 101207716 B1 KR101207716 B1 KR 101207716B1 KR 1020100051603 A KR1020100051603 A KR 1020100051603A KR 20100051603 A KR20100051603 A KR 20100051603A KR 101207716 B1 KR101207716 B1 KR 101207716B1
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- rectifier
- bridge circuit
- transformer
- diode
- switches
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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Abstract
It is an object of the present invention to provide a vehicle charger capable of outputting a wide range of output voltages while having excellent withstand voltage characteristics. The vehicle charger may include a first transformer; And a converter unit arranged on the primary side of the first transformer, and a rectifying unit arranged on the secondary side of the first transformer. Here, when the rectifier is switched from the full bridge circuit to the half bridge circuit or the half bridge circuit to the full bridge circuit according to a control signal, and the current having the same magnitude is input to the converter unit, the rectifier is the half bridge circuit. The magnitude of the output voltage output from the rectification section when formed as is greater than the magnitude of the output voltage output from the rectification section when the rectification section is formed of the full bridge circuit.
Description
The present invention relates to a vehicle charger capable of outputting a wide range of output voltage while having excellent withstand voltage characteristics.
A vehicle charger is a device that provides a voltage required for a vehicle, and generally includes two stages of a power factor correction unit (PFC) and a DC / DC converter for power factor improvement.
In this case, since the DC / DC converter is composed of one stage, elements included in the DC / DC converter have to have strong withstand voltage characteristics in order to withstand the withstand voltage. In other words, expensive devices have been required, thus increasing the manufacturing cost of the charger.
In addition, the charger generally used by arranging transformers in parallel. However, if the transformers are implemented in parallel, current may flow unidirectionally to a specific transformer if the turns ratio and inductance value of the transformers do not match. As a result, the transformer could cause abnormal heat generation and there was a risk of breakage.
Moreover, the charger has been difficult to implement a wide range of output voltages.
In addition, in the vehicle, even if the input power is different, it is always necessary to output the same output voltage, but the charger could not output the same output voltage if the input power is different.
It is an object of the present invention to provide a vehicle charger capable of outputting a wide range of output voltages while having excellent withstand voltage characteristics.
In order to achieve the above object, a vehicle charger according to an aspect of the present invention comprises a first transformer; A converter unit arranged on the primary side of the first transformer; And a rectifier arranged on the secondary side of the first transformer. Here, when the rectifier is switched from the full bridge circuit to the half bridge circuit or the half bridge circuit to the full bridge circuit according to a control signal, and the current having the same magnitude is input to the converter unit, the rectifier is the half bridge circuit. The magnitude of the output voltage output from the rectification section when formed as is greater than the magnitude of the output voltage output from the rectification section when the rectification section is formed of the full bridge circuit.
According to another aspect of the present invention, a vehicle charger includes a first transformer; A second transformer; And
And a converter unit connected to the primary side of the first transformer and having a first switching unit including a plurality of first switches and a second switching unit connected to the primary side of the second transformer and including a plurality of second switches. . Here, the first switching unit and the second switching unit are connected in series.
delete
In the vehicle charger according to the present invention, since the rectifier may be switched from a full bridge circuit to a half bridge circuit or from a half bridge circuit to a full bridge circuit, an advantage of outputting the same output voltage even if different size input voltages are inputted. have. Of course, when input voltages of the same magnitude are input, output voltages of different magnitudes may be output.
In addition, since the switching units included in the current converter of the vehicle charger are arranged in series with each other, it may have excellent withstand voltage characteristics. Therefore, since the switches used in the current converter do not have to use expensive products, the manufacturing cost of the charger can be reduced.
1 is a circuit diagram illustrating a vehicle charger according to a first embodiment of the present invention.
FIG. 2 is a view illustrating an operation flow of the vehicle rechargeable battery of FIG. 1.
3 is a circuit diagram illustrating a vehicle charger according to a second embodiment of the present invention.
4 is a view illustrating an operation flow of the vehicle rechargeable battery of FIG. 3.
5 is a timing diagram illustrating an operation flow of the charger of FIG. 3 according to an embodiment of the present invention.
6 and 7 illustrate output voltages according to an embodiment of the present invention.
8 is a timing diagram illustrating on / off times of switches according to a first duty ratio according to an embodiment of the present invention.
9 is a timing diagram illustrating on / off times of switches according to a second duty ratio according to an embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The vehicle charger may use commercial power, that is, 110V ac and 220V ac , and is preferably implemented to output various sizes of output voltages due to the characteristics of the vehicle.
Accordingly, the present invention proposes a vehicle charger capable of outputting various output voltages, in particular capable of outputting a wide range of output voltages. For example, the vehicle charger of the present invention may implement 100V to 500V.
In addition, the vehicle charger may be implemented to have a strong withstand voltage characteristics.
Hereinafter, various embodiments of the vehicle chargers of the present invention will be described with reference to the accompanying drawings.
1 is a circuit diagram illustrating a vehicle charger according to a first embodiment of the present invention, and FIG. 2 is a view illustrating an operation flow of the vehicle rechargeable battery of FIG. 1.
Referring to FIG. 1, the vehicle charger according to the present embodiment includes an
The
The
The inductor L1 is a device that stores energy and is connected to the
The
The
The
The
According to an embodiment of the present invention, the
On the other hand, in the conventional charger, the charger uses only one switching unit, and as a result, the devices of the switching unit had to withstand a large withstand voltage. Therefore, the charger had to use only expensive devices capable of withstanding a large withstand voltage, and as a result, the manufacturing cost of the charger had to be increased.
However, since the charger of the present embodiment uses the
The
The primary side of the
The primary side of the
Although the turns ratio of the
The
In addition, the
The
On the other hand, the voltage output from the
According to an embodiment of the present invention, the output voltage V out may be varied by varying the duty ratio according to the on / off ratio of the switches 112a to 112h. Details thereof will be described in detail in the second embodiment.
In other words, the vehicle charger of the present embodiment may output the output voltage V out of various sizes by changing the duty ratio according to the on / off ratio of the switches 112a to 112h included in the
In FIG. 1, the
3 is a circuit diagram illustrating a vehicle charger according to a second embodiment of the present invention, and FIG. 4 is a view illustrating an operation flow of the vehicle rechargeable battery of FIG. 3.
Referring to FIG. 3, the vehicle charger of the present embodiment includes an
Since the remaining components except for the
The
The first capacitor C1 is connected to one end of the secondary side of the
The diodes D1 to D4 form a full bridge circuit and are connected to the first capacitor C1. Specifically, node n5 between diodes D1 and D2 is connected to first capacitor C1, and node n6 between diodes D3 and D4 is connected to
The
According to an embodiment of the present invention, when the
As a result, the output voltage V out may be the same even if the magnitude of the input power source V ac is different. For example, assuming that the
According to another embodiment of the present invention, the vehicle charger may turn on the
Of course, the charger operates as shown in Fig. 4 similarly to the first embodiment.
Hereinafter, the overall operation of the vehicle charger will be described.
5 is a timing diagram illustrating an operation flow of the charger of FIG. 3 according to an embodiment of the present invention, and FIGS. 6 and 7 are views illustrating output voltages according to an embodiment of the present invention.
3 and 5, the
Specifically, in to to t1, all the
Subsequently, at t1 to t2, the
Subsequently, at switches t2 to t3 all the
Subsequently, at t3 to t4, the
Subsequently, the processes of t1 to t4 are repeatedly performed.
In short, the vehicle charger of the present embodiment controls the on / off of the
The charger may maintain the
As a result of the actual test of the vehicle charger, it was confirmed that the output voltage V out outputs 150V and 450V as shown in FIGS. 6 and 7.
That is, the vehicle charger of the present invention can implement a wide range of output voltage (V out ), for example, 100V to 500V.
However, in order to implement the wide range output voltage V out , the vehicle charger sets the duty ratio appropriately as described below.
FIG. 8 is a timing diagram illustrating on / off times of switches according to a first duty ratio according to an embodiment of the present invention, and FIG. 9 is ON of switches according to a second duty ratio according to an embodiment of the present invention. A timing diagram showing on / off times.
8 and 9, the time that all the
In the case of using the duty ratio shown in FIG. 8, the charger outputs an output voltage V out of 300V, whereas in the case of using the duty ratio shown in FIG. 9, the charger outputs an output voltage V out of 450V. Was output. Here, 220 V ac was used as the input power source (V ac ).
That is, by controlling the duty ratios according to the on / off times of the
The embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art having ordinary knowledge of the present invention may make various modifications, changes, and additions within the spirit and scope of the present invention. Should be considered to be within the scope of the following claims.
100: input circuit portion 102: current type converter portion
104: transformer section 106: rectifier section
108: filtering unit 110: switching unit
112: switch 114: transformer
300: input circuit portion 302: current type converter portion
304: transformer section 306: rectifier section
308: filtering unit 310: switching unit
312 switch 314 transformer
320: third switch
Claims (13)
A converter unit arranged on the primary side of the first transformer; And
Including a rectifier arranged on the secondary side of the first transformer,
The rectifier is switched from the full bridge circuit to the half bridge circuit or from the half bridge circuit to the full bridge circuit according to a control signal, and when the current having the same magnitude is input to the converter unit, the rectifier is formed as the half bridge circuit. The magnitude of the output voltage output from the rectifier in the case is larger than the magnitude of the output voltage output from the rectifier in the case where the rectifier is formed of the full bridge circuit.
A first diode and a second diode connected in parallel to one end of the secondary side of the first transformer;
Third and fourth diodes connected in parallel to the other ends of the secondary side of the first transformer; And
One end is connected to the node between the third diode and the fourth diode, and the other end includes a first switch connected to ground,
And the first to fourth diodes form the full bridge circuit, and the full bridge circuit is switched to the half bridge circuit as the first switch is turned on.
A first capacitor connected to one end of the secondary side of the first transformer and a node between the first diode and the second diode; And
And a second capacitor coupled to the node between the first diode and the third diode.
The converter unit,
Inductors;
A first switching unit having a plurality of second switches connected to the inductor and the primary side of the first transformer; And
A second switching unit having a plurality of third switches connected to the primary side of the first switching unit and the second transformer,
The first switching unit and the second switching unit are connected in series with respect to the inductor, and one side of the secondary side of the second transformer is connected with a node between the first diode and the second diode, and the second And the other side of the secondary side of the transformer is connected to a node between the third diode and the fourth diode.
The magnitude of the output voltage is dependent on the ratio of the first time that both the second switches and the third switches are on and the second time when some of the second and third switches are off. Car charger.
And an output voltage output from the rectifier when the rectifier is formed of the full bridge circuit and an output voltage output from the rectifier when the rectifier is formed by the half bridge circuit.
A second transformer;
A converter having an inductor, a first switching portion connected to the primary side of the first transformer and comprising a plurality of first switches, and a second switching portion connected to the primary side of the second transformer and comprising a plurality of second switches part; And
A first diode and a second diode connected in parallel to one end of the secondary side of the first transformer, a third diode and a fourth diode connected in parallel to the other end of the secondary side of the first transformer, one end of which is connected to the third diode and the A third switch connected to a node between the fourth diode and the other end connected to ground, a first capacitor connected to one end of the secondary side of the first transformer and a node between the first diode and the second diode, and the first A rectifier having a second capacitor connected to a node between the diode and the third diode,
The first switching unit and the second switching unit are connected in series with respect to the inductor, and the first to fourth diodes form a full bridge circuit, and the full bridge circuit is half bridged as the third switch is turned on. Car charger, characterized in that switched to the circuit.
The magnitude of the output voltage is dependent on the ratio of the first time that the first switches and the second switches are both on and the second time when some of the first and second switches are off. Car charger.
And an output voltage output from the rectifier when the rectifier is formed of the full bridge circuit and an output voltage output from the rectifier when the rectifier is formed by the half bridge circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020100051603A KR101207716B1 (en) | 2010-06-01 | 2010-06-01 | Battery charger for a vehicle with wide output voltage range |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020100051603A KR101207716B1 (en) | 2010-06-01 | 2010-06-01 | Battery charger for a vehicle with wide output voltage range |
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KR20110131912A KR20110131912A (en) | 2011-12-07 |
KR101207716B1 true KR101207716B1 (en) | 2012-12-03 |
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KR1020100051603A KR101207716B1 (en) | 2010-06-01 | 2010-06-01 | Battery charger for a vehicle with wide output voltage range |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20130065174A (en) | 2011-12-09 | 2013-06-19 | 현대자동차주식회사 | Heat exchanger for vehicle |
KR102615119B1 (en) * | 2018-10-08 | 2023-12-15 | 한국전기연구원 | DC/DC converter having multi-converter modules |
CN116722631B (en) * | 2023-08-11 | 2024-03-22 | 深圳市高斯宝电气技术有限公司 | Wide voltage output charger interface circuit |
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