CN114204814A - Non-inductive DC/DC conversion circuit - Google Patents
Non-inductive DC/DC conversion circuit Download PDFInfo
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- CN114204814A CN114204814A CN202111550433.0A CN202111550433A CN114204814A CN 114204814 A CN114204814 A CN 114204814A CN 202111550433 A CN202111550433 A CN 202111550433A CN 114204814 A CN114204814 A CN 114204814A
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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
- 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
- H02M3/1582—Buck-boost converters
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- Dc-Dc Converters (AREA)
Abstract
本发明公开了一种无感DC/DC变换电路。该电路包括：第一电容、第二电容、第三电容、第一开关管、第二开关管、第三开关管以及第四开关管；第一开关管的输出端与第二开关管的输入端连接；第二开关管的输出端与第三开关管的输入端连接；第三开关管的输出端与第四开关管的输入端连接；第一电容的一端与第一开关管的输出端连接，第一电容的另一端与第三开关管的输出端连接；第二电容的一端与第一开关管的输入端连接，第二电容的另一端以及第三电容的另一端均与第二开关管的输出端连接；第三电容的一端与第四开关管的输出端连接。该无感电路降低了装置的重量，通过调整开关管的通断来兼顾多种工况，使开关管占空比的调节与控制变得简单。
The invention discloses a non-inductive DC/DC conversion circuit. The circuit includes: a first capacitor, a second capacitor, a third capacitor, a first switch tube, a second switch tube, a third switch tube and a fourth switch tube; the output end of the first switch tube and the input of the second switch tube the output end of the second switch tube is connected to the input end of the third switch tube; the output end of the third switch tube is connected to the input end of the fourth switch tube; one end of the first capacitor is connected to the output end of the first switch tube The other end of the first capacitor is connected to the output end of the third switch tube; one end of the second capacitor is connected to the input end of the first switch tube, and the other end of the second capacitor and the other end of the third capacitor are connected to the second The output end of the switch tube is connected; one end of the third capacitor is connected to the output end of the fourth switch tube. The non-inductive circuit reduces the weight of the device, and takes into account various working conditions by adjusting the on-off of the switch tube, so that the adjustment and control of the duty ratio of the switch tube becomes simple.
Description
Technical Field
The invention relates to the technical field of DC/DC converters, in particular to a non-inductive DC/DC conversion circuit.
Background
The DC/DC converter is divided into an isolated type and a non-isolated type, and the non-isolated type DC/DC converter is not provided with a high-frequency transformer, so that the power is not limited by the high-frequency transformer, and the DC/DC converter has the characteristics of small volume, high allowable power and the like. When a non-isolated DC/DC converter circuit is designed, the Buck circuit and the Boost chopper circuit are improved and combined in the industry. The unidirectional DC/DC converter is mainly improved on the basis of a Buck circuit to realize voltage reduction, and is improved on the basis of a Boost circuit to realize voltage boosting. The bidirectional DC/DC converter can maintain the polarity of the voltage at two ends of the converter unchanged, can realize bidirectional flow of direct current electric energy, and is widely applied to the fields of hybrid power systems, new energy power generation and the like.
However, the above circuit has the following disadvantages in design: 1. the inductor exists in the circuit, and the heavier iron core in the inductor makes the whole device heavier, so that when the inductor is applied to a moving system, the dynamic property of the whole system is seriously influenced; 2. the duty ratio of a switching tube in the circuit is realized by controlling a PWM signal, and the small change of the duty ratio of the switching tube can influence the change of voltage and current gain, so that the adjustment of the switching tube is more complicated; 3. the circuit design is mostly only suitable for one of boosting, voltage reduction and bidirectional working conditions, can not give consideration to various working conditions, and has certain limitation.
Disclosure of Invention
In view of the above problems, the present invention provides a non-inductive DC/DC conversion circuit.
In order to achieve the purpose, the invention provides the following scheme:
a non-inductive DC/DC conversion circuit comprising: the circuit comprises a first capacitor, a second capacitor, a third capacitor, a first switching tube, a second switching tube, a third switching tube and a fourth switching tube;
the output end of the first switch tube is connected with the input end of the second switch tube; the output end of the second switching tube is connected with the input end of the third switching tube; the output end of the third switching tube is connected with the input end of the fourth switching tube;
one end of the first capacitor is connected with the output end of the first switching tube, and the other end of the first capacitor is connected with the output end of the third switching tube;
one end of the second capacitor is connected with the input end of the first switch tube, and the other end of the second capacitor and the other end of the third capacitor are both connected with the output end of the second switch tube; and one end of the third capacitor is connected with the output end of the fourth switch tube.
Optionally, the first switch tube, the second switch tube, the third switch tube, and the fourth switch tube are all in a self-locking mode.
Optionally, when the non-inductive DC/DC conversion circuit operates under a step-down condition, the second switching tube and the third switching tube are interlocked and alternately opened.
Optionally, when the non-inductive DC/DC conversion circuit operates under a boost condition, the first switching tube and the fourth switching tube are interlocked and alternately opened.
Optionally, when the non-inductive DC/DC conversion circuit operates under a bidirectional working condition, the first switching tube and the third switching tube are synchronized in one group, the second switching tube and the fourth switching tube are synchronized in one group, and two groups of interlocks are alternately turned on.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
(1) a non-inductive circuit is designed, and the weight of the device is effectively reduced because no inductor is arranged in the circuit;
(2) the switching tube is designed to be in a self-locking mode, and the voltage of the high-voltage end can be basically 2 times that of the low-voltage end only by adopting the same duty ratio staggered control, so that the sampling and the control are simplified;
(3) the operation of various working conditions such as boosting, reducing voltage, bidirectional working conditions and the like is realized by adjusting the alternate on-off of each switching tube.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic diagram of an noninductive DC/DC conversion circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the non-inductive DC/DC converter circuit provided by the present invention includes: a first capacitor C1, a second capacitor C2, a third capacitor C3, a first switching tube SIC-1, a second switching tube SIC-2, a third switching tube SIC-3 and a fourth switching tube SIC-4.
The output end of the first switching tube SIC-1 is connected with the input end of the second switching tube SIC-2; the output end of the second switching tube SIC-2 is connected with the input end of the third switching tube SIC-3; the output end of the third switching tube SIC-3 is connected with the input end of the fourth switching tube SIC-4.
One end of the first capacitor C1 is connected with the output end of the first switching tube SIC-1, and the other end of the first capacitor C1 is connected with the output end of the third switching tube SIC-3;
one end of the second capacitor C2 is connected to the input end of the first switching tube SIC-1, and the other end of the second capacitor C2 and the other end of the third capacitor C3 are both connected to the output end of the second switching tube SIC-2; one end of the third capacitor C3 is connected to the output end of the fourth switching tube SIC-4.
The first switching tube SIC-1, the second switching tube SIC-2, the third switching tube SIC-3 and the fourth switching tube SIC-4 are all in a self-locking mode.
The invention respectively adopts the method of alternately opening the single switch and alternately opening the grouped switches, so that the invention has the effect of working under different working conditions such as a voltage reduction working condition, a voltage boosting working condition, a bidirectional working condition and the like.
And (3) boosting working condition:
SIC-2 and SIC-3 are interlocked and alternately opened, when SIC-2 is conducted, C1 charges C3, when SIC-3 is conducted, C1 charges C2, the voltages of CI, C2 and C3 are basically consistent, and the voltage of a high-voltage end is basically 2 times that of a low-voltage end. When the high-voltage end needs electricity, power flows from the low-voltage end to the high-voltage end, and the system is naturally cut off when the high-voltage end feeds electricity;
and (3) pressure reduction working condition:
SIC-1 and SIC-4 are interlocked and alternately opened, when SIC-1 is conducted, C2 charges C1, when SIC-4 is conducted, C3 charges C1, the voltages of CI, C2 and C3 are basically consistent, and the voltage of a high-voltage end is basically 2 times that of a low-voltage end. When the low-voltage end needs electricity, the power flows from the high-voltage end to the low-voltage end, and the system is naturally cut off when the low-voltage end feeds electricity;
bidirectional working condition:
SIC-1 and SIC-3 are a group of synchronizations, SIC-2 and SIC-4 are a group of synchronizations, and the two groups of interlocks are opened alternately, so that the voltage of the high-voltage end is basically 2 times that of the low-voltage end, and the power flow can flow in two directions.
For the working conditions of voltage boosting and voltage reducing, the method of alternately opening the interlocking switch tubes and sequentially charging the capacitor is adopted, so that the voltage of the high-voltage end basically meets 2 times of that of the low-voltage end, and the voltage boosting and reducing circuit has the effect of voltage boosting and reducing.
For the bidirectional working condition, the invention designs the circuit structure to simultaneously open one group of switch tubes to meet the requirement of the circuit for bidirectional working, and adopts the method of alternately opening the group of switch tubes and the other group of switch tubes to ensure that the invention not only can bidirectionally work, but also has the effect of boosting and reducing voltage.
The invention designs the non-inductive circuit, and greatly reduces the weight of the device. The on-off of the four switching tubes is adjusted to take account of multiple working conditions such as pressurization, depressurization and bidirectional working conditions, and the duty ratio of the switching tubes is adjusted and controlled simply.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111550433.0A CN114204814A (en) | 2021-12-17 | 2021-12-17 | Non-inductive DC/DC conversion circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111550433.0A CN114204814A (en) | 2021-12-17 | 2021-12-17 | Non-inductive DC/DC conversion circuit |
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| CN114204814A true CN114204814A (en) | 2022-03-18 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973944A (en) * | 1997-11-19 | 1999-10-26 | Linear Technology Corporation | Inductorless step-up and step-down converter with inrush current limiting |
| JP2003111388A (en) * | 2001-09-27 | 2003-04-11 | Sharp Corp | Switched capacitor type stabilization power circuit |
| JP2005224060A (en) * | 2004-02-06 | 2005-08-18 | Honda Motor Co Ltd | Dc/dc converter and program |
| US20080211316A1 (en) * | 2006-12-01 | 2008-09-04 | Honda Motor Co., Ltd. | Electric power converter |
| CN105305811A (en) * | 2014-06-28 | 2016-02-03 | 嘉兴禾润电子科技有限公司 | Charge pump drive circuit system for stepper motor |
| US20190181755A1 (en) * | 2017-12-07 | 2019-06-13 | Yaskawa America, Inc. | Inductorless dc to dc converters |
| CN112821752A (en) * | 2021-02-10 | 2021-05-18 | 厦门市必易微电子技术有限公司 | Drive control circuit, control method and charge pump circuit |
-
2021
- 2021-12-17 CN CN202111550433.0A patent/CN114204814A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973944A (en) * | 1997-11-19 | 1999-10-26 | Linear Technology Corporation | Inductorless step-up and step-down converter with inrush current limiting |
| JP2003111388A (en) * | 2001-09-27 | 2003-04-11 | Sharp Corp | Switched capacitor type stabilization power circuit |
| JP2005224060A (en) * | 2004-02-06 | 2005-08-18 | Honda Motor Co Ltd | Dc/dc converter and program |
| US20080211316A1 (en) * | 2006-12-01 | 2008-09-04 | Honda Motor Co., Ltd. | Electric power converter |
| CN105305811A (en) * | 2014-06-28 | 2016-02-03 | 嘉兴禾润电子科技有限公司 | Charge pump drive circuit system for stepper motor |
| US20190181755A1 (en) * | 2017-12-07 | 2019-06-13 | Yaskawa America, Inc. | Inductorless dc to dc converters |
| CN112821752A (en) * | 2021-02-10 | 2021-05-18 | 厦门市必易微电子技术有限公司 | Drive control circuit, control method and charge pump circuit |
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