CN103532386A - Boost converter - Google Patents
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- CN103532386A CN103532386A CN201310546110.3A CN201310546110A CN103532386A CN 103532386 A CN103532386 A CN 103532386A CN 201310546110 A CN201310546110 A CN 201310546110A CN 103532386 A CN103532386 A CN 103532386A
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Abstract
The invention discloses a boost converter which comprises N inductors, N diodes, N power switches and one capacitor, wherein the N inductors and the N diodes are connected in series, a positive electrode of each diode is connected with the first end of the inductor connected in series, a negative electrode of each diode is connected with the first end of the capacitor, the second end of the capacitor is connected with a ground wire, one power switch is connected between the positive electrode of each diode and the ground wire, the second end of each inductor is connected with a positive voltage input end, and the negative electrode of each diode is connected with a positive voltage output end. A PWM (pulse width modulation) control mode is adopted to drive the N power switches to work during the working period, the drive pulses of the N power switches successively differ by 360/N degrees in each switching period, wherein N is equal to or more than 2 and is an integer.
Description
Technical field
The present invention relates to converter technical field, relate in particular to a kind of booster converter.
Background technology
Referring to Fig. 1, be the circuit diagram of traditional DC/DC converter that boosts, this DC/DC converter that boosts is comprised of inductance L, diode D, power switch S and capacitor C.By the duty ratio of regulating power switch S, to realize the boosting rectifier control to DC/DC converter, concrete, in charging process, power switch S is closed, and input current flows through inductance L, and the electric current in inductance L increases so that certain ratio is linear, along with inductance L electric current increases, in inductance L, just stored energy.In discharge process, power switch S disconnects, due to the electric current retention performance of inductance, the electric current of the inductance L of flowing through can not become 0 at once, but by charging, value when complete diminishes gradually slowly, in this process, inductance L starts to capacitor C charging, and capacitor C both end voltage raises; If the process of this break-make constantly repeats, just can obtain at capacitor C two ends the voltage higher than input voltage.
But, being subject to the restriction of the factors such as profile, it is larger that the inductance value of inductance can not design, so this can cause the ripple coefficient of DC/DC converter larger; If make traditional DC/DC converter meet the requirement of ripple coefficient, certainly will require to increase inductance value, but this can cause the volume of inductance to increase, the energy density of DC/DC converter also can be smaller.
Summary of the invention
In view of this, the main purpose of the embodiment of the present invention is to provide a kind of booster converter, is not increasing on the basis of inductance volume, to realize the object of the ripple coefficient that reduces DC/DC converter.
For achieving the above object, the embodiment of the present invention provides a kind of booster converter, comprising: the inductance that N road is connected in series and diode, N power switch and an electric capacity;
The anode of every road diode is connected with the first end of the inductance being connected in series, the negative electrode of each diode is all connected with the first end of described electric capacity, the second end of described electric capacity is connected with ground wire, between the anode of each diode and described ground wire, be connected a power switch, the second end of each inductance is all connected with positive voltage input, and the negative electrode of each diode is all connected with positive voltage output end;
During operation, adopt pulse width modulation (PWM) control mode to drive described N power switch work, in each switch periods, the driving pulse of a described N power switch differs 360/N degree successively, N >=2 wherein, and N is integer.
Preferably, in above-mentioned booster converter,
The iron core of described inductance at least comprises two iron leg cores, and every iron leg core connects successively according to setting shape, is connected and forms gap between two iron leg cores.
Preferably, in above-mentioned booster converter,
The iron core of described inductance is the iron core of amorphous alloy.
Preferably, in above-mentioned booster converter,
The coiling of described inductance is copper strips.
Preferably, in above-mentioned booster converter, described booster converter also comprises: the first current sensor and the second current sensor;
Described the first current sensor is arranged on positive voltage input line;
Described the second current sensor is arranged on positive voltage output line;
Described the first current sensor and described the second current sensor, for gathering current signal, to utilize the driving pulse of N power switch described in described current signal.
Preferably, in above-mentioned booster converter,
Adopt difference channel to gather the voltage between described positive voltage input and ground wire, and gather the voltage between described positive voltage output end and ground wire.
Preferably, in above-mentioned booster converter, described booster converter also comprises: fast acting fuse;
Described fast acting fuse is connected between described electric capacity and described the second current sensor;
Described fast acting fuse, while being greater than predetermined current for the electric current flowing through, controlling and self fuses to cut off electric current.
Preferably, in above-mentioned booster converter, described power switch is IGBT power switch pipe.
Visible, the booster converter that the embodiment of the present invention provides, during operation, adopt pulse width modulation (PWM) control mode to drive described N power switch work, in each switch periods, the driving pulse of a described N power switch differs 360/N degree successively, and this control mode is equivalent to the switching frequency of DC/DC converter to improve 4 times, thereby has reduced ripple.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit diagram of existing DC/DC converter;
Fig. 2 is the circuit diagram of embodiment of the present invention DC/DC converter;
Fig. 3 is embodiment of the present invention phase-shift pulse modulation schematic diagram;
Fig. 4 embodiment of the present invention inductor core segmentation schematic diagram;
Fig. 5 embodiment of the present invention is for gathering the difference channel schematic diagram of voltage.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The booster converter that the embodiment of the present invention provides, comprising: the inductance that N road is connected in series and diode, N power switch and an electric capacity;
The anode of every road diode is connected with the first end of the inductance being connected in series, the negative electrode of each diode is all connected with the first end of described electric capacity, the second end of described electric capacity is connected with ground wire, between the anode of each diode and described ground wire, be connected a power switch, the second end of each inductance is all connected with positive voltage input, and the negative electrode of each diode is all connected with positive voltage output end;
During operation, adopt pulse width modulation (PWM) control mode to drive described N power switch work, in each switch periods, the driving pulse of a described N power switch differs 360/N degree successively, N >=2 wherein, and N is integer.
In addition, described booster converter also comprises: the first current sensor and the second current sensor;
Described the first current sensor is arranged on positive voltage input line; Described the second current sensor is arranged on positive voltage output line;
Described the first current sensor and described the second current sensor, for gathering current signal, to utilize the driving pulse of N power switch described in described current signal.
Wherein, described power switch can be IGBT power switch pipe or other switching tube.
In addition, described booster converter also comprises: fast acting fuse; Described fast acting fuse is connected between described electric capacity and described the second current sensor; Described fast acting fuse, while being greater than predetermined current for the electric current flowing through, controlling and self fuses to cut off electric current.
In order to understand more easily the embodiment of the present invention, illustrate below:
Referring to Fig. 2, the circuit diagram of the DC/DC converter that boosts providing for the embodiment of the present invention, DC/DC inverter main circuit comprises: inductance L 1, inductance L 2, inductance L 3 and inductance L 4, diode Q1.2, diode Q2.2, diode Q3.2 and diode Q4.2, IGBT power switch pipe Q1.1, IGBT power switch pipe Q2.1, IGBT power switch pipe Q3.1 and IGBT power switch pipe Q4.1, and a capacitor C 1.Their annexation is as follows:
The anodic bonding of the first end of inductance L 1 and diode Q1.2, the anodic bonding of the first end of inductance L 2 and diode Q2.2, the anodic bonding of the first end of inductance L 3 and diode Q3.2, the anodic bonding of the first end of inductance L 4 and diode Q4.2; The negative electrode of diode Q1.2, diode Q2.2, diode Q3.2 and diode Q4.2 is all connected with the first end of capacitor C 1; The second end of capacitor C 1 is connected with ground wire; IGBT power switch pipe Q1.1 is connected in parallel on the two ends of capacitor C 1 and diode Q1.2, IGBT power switch pipe Q2.1 is connected in parallel on the two ends of capacitor C 1 and diode Q2.2, IGBT power switch pipe Q3.1 is connected in parallel on the two ends of capacitor C 1 and diode Q3.2, and IGBT power switch pipe Q4.1 is connected in parallel on the two ends of the capacitor C 1 that is connected in series and diode Q4.2.
The feature of this DC/DC inverter main circuit has been to adopt the connected mode of quadruple parallel connection, that is: inductance L 1, IGBT power switch pipe Q1.1 and diode Q1.2 are as first unit module, inductance L 2, IGBT power switch pipe Q2.1 and diode Q2.2 are as second unit module, inductance L 3, IGBT power switch pipe Q3.1 and diode Q3.2 are as the 3rd unit module, inductance L 4, IGBT power switch pipe Q4.1 and diode Q4.2 are as the 4th unit module, and these four unit modules are connected in parallel.Based on this quadruple mode that is connected in parallel, the embodiment of the present invention has adopted the control mode of pulse width modulation (PWM), has realized the control mode of quadruple 90 degree phase shifts, and the driving pulse of Q1.1-Q4.1 differs 90 degree successively.Phase-shift pulse modulation schematic diagram shown in Figure 3, can regulate according to the actual requirements the duty ratio D=Ton/Ts of IGBT power switch pipe, wherein, Ts is the work period of IGBT power switch pipe, and Ton is the ON time of IGBT power switch pipe.
In the course of work, this DC/DC converter can be divided into 4 mode in a switch periods.
Between mode 1(t1 and t2): IGBT power switch pipe Q1.1 and Q4.1 are closed, and diode Q1.2 and Q4.2 oppositely end, and are inductance L 1 and L4 stored energy; Meanwhile, IGBT power switch pipe Q2.1 and Q3.1 disconnect, diode Q2.2 and Q3.2 conducting, and inductance L 2 and inductance L 3 give capacitor C 1 charging.
Between mode 2(t2 and t3): IGBT power switch pipe Q1.1 and Q2.1 are closed, and diode Q1.2 and Q2.2 oppositely end, and are inductance L 1 and L2 stored energy; Meanwhile, IGBT power switch pipe Q3.1 and Q4.1 disconnect, diode Q3.2 and Q4.2 conducting, and inductance L 3 and inductance L 4 give capacitor C 1 charging.
Between mode 3(t3 and t3): IGBT power switch pipe Q2.1 and Q3.1 are closed, and diode Q2.2 and Q3.2 oppositely end, and are inductance L 2 and L3 stored energy; Meanwhile, IGBT power switch pipe Q1.1 and Q4.1 disconnect, diode Q1.2 and Q4.2 conducting, and inductance L 1 and inductance L 4 give capacitor C 1 charging.
Between mode 4(t4 and t5): IGBT power switch pipe Q3.1 and Q4.1 are closed, and diode Q3.2 and Q4.2 oppositely end, and are inductance L 3 and L4 stored energy; Meanwhile, IGBT power switch pipe Q1.1 and Q2.1 disconnect, diode Q1.2 and Q2.2 conducting, and inductance L 1 and inductance L 2 give capacitor C 1 charging.
Visible, compared with prior art, this control mode is equivalent to the switching frequency of DC/DC converter to improve 4 times, thereby has reduced ripple.In addition, the DC/DC converter that adopts the embodiment of the present invention to provide, the inductance value that can reduce each inductance meets the requirement of DC/DC converter to ripple, thereby reaches the object of the volume and weight that reduces inductance.
In addition, this DC/DC inverter main circuit also comprises; The first current sensor Sl1, the second current sensor Sl2 and fast acting fuse FU1, the first current sensor Sl1 is connected between the second end of positive voltage input and each inductance, and the second current sensor Sl2 and fast acting fuse FU1 are connected between electric capacity and positive voltage output end.
Further, if according to traditional inductor design mode, inductor loss is very large, and operating efficiency is lower.The embodiment of the present invention has been carried out following improvement to inductance:
The first, the improvement of inductor core
First, the iron core that the iron core of inductance is amorphous alloy; Secondly, the iron core of described inductance at least comprises two iron leg cores, and every iron leg core connects successively according to setting shape, is connected and forms gap between two iron leg cores.Inductor core segmentation schematic diagram shown in Figure 4, supposes that inductor core is U-iron core, is divided into some sections, between section and section, just formed gap, so just increased the magnetic flux density of iron core, the inductance of the embodiment of the present invention has adopted segment design, can effectively reduce the iron loss of inductance; And the profile of iron core regulates and becomes easily, by regulating core configuration can reduce the volume of inductance.
The second, the improvement of inductance coiling
Enamelled wire has in the past been abandoned in the coiling of inductance, has adopted copper strips coiling, and the surface area ratio enamelled wire of copper cash is large, and coiling can be more fastening, so inductance volume has reduced and the impact of inductance kelvin effect has also reduced; Because kelvin effect reduces, so the copper loss of inductance has also reduced.
Further, the embodiment of the present invention adopts difference channel to gather the voltage between described positive voltage input and ground wire, and gathers the voltage between described positive voltage output end and ground wire.
In the practical application of DC/DC converter, need to sample to the voltage of DC/DC converter, the DC/DC converter of the embodiment of the present invention does not adopt voltage sensor, but adopting difference channel to carry out the Direct Sampling of voltage, the volume that such mode has not only been saved sample circuit in DC/DC converter has reduced again cost.Referring to Fig. 5 for the embodiment of the present invention provide for gathering the difference channel schematic diagram of voltage, the voltage signal of this difference channel collection can directly be sent into DC/DC convertor controls plate and use.
Visible, the booster converter that the embodiment of the present invention provides, during operation, adopt pulse width modulation (PWM) control mode to drive described N power switch work, in each switch periods, the driving pulse of a described N power switch differs 360/N degree successively, and this control mode is equivalent to the switching frequency of DC/DC converter to improve 4 times, thereby has reduced ripple.
It should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a booster converter, is characterized in that, comprising: the inductance that N road is connected in series and diode, N power switch and an electric capacity;
The anode of every road diode is connected with the first end of the inductance being connected in series, the negative electrode of each diode is all connected with the first end of described electric capacity, the second end of described electric capacity is connected with ground wire, between the anode of each diode and described ground wire, be connected a power switch, the second end of each inductance is all connected with positive voltage input, and the negative electrode of each diode is all connected with positive voltage output end;
During operation, adopt pulse width modulation (PWM) control mode to drive described N power switch work, in each switch periods, the driving pulse of a described N power switch differs 360/N degree successively, N >=2 wherein, and N is integer.
2. booster converter according to claim 1, is characterized in that,
The iron core of described inductance at least comprises two iron leg cores, and every iron leg core connects successively according to setting shape, is connected and forms gap between two iron leg cores.
3. booster converter according to claim 1 and 2, is characterized in that,
The iron core of described inductance is the iron core of amorphous alloy.
4. booster converter according to claim 1, is characterized in that,
The coiling of described inductance is copper strips.
5. booster converter according to claim 1, is characterized in that, described booster converter also comprises: the first current sensor and the second current sensor;
Described the first current sensor is arranged on positive voltage input line;
Described the second current sensor is arranged on positive voltage output line;
Described the first current sensor and described the second current sensor, for gathering current signal, to utilize the driving pulse of N power switch described in described current signal.
6. booster converter according to claim 5, is characterized in that,
Adopt difference channel to gather the voltage between described positive voltage input and ground wire, and gather the voltage between described positive voltage output end and ground wire.
7. the booster converter of stating according to claim 1, is characterized in that, described booster converter also comprises: fast acting fuse;
Described fast acting fuse is connected between described electric capacity and described the second current sensor;
Described fast acting fuse, while being greater than predetermined current for the electric current flowing through, controlling and self fuses to cut off electric current.
8. the booster converter of stating according to claim 1, is characterized in that, described power switch is IGBT power switch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310546110.3A CN103532386A (en) | 2013-11-06 | 2013-11-06 | Boost converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310546110.3A CN103532386A (en) | 2013-11-06 | 2013-11-06 | Boost converter |
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| CN103532386A true CN103532386A (en) | 2014-01-22 |
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| CN201310546110.3A Pending CN103532386A (en) | 2013-11-06 | 2013-11-06 | Boost converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736712A (en) * | 2017-04-20 | 2018-11-02 | 威士多公司 | Electric power converter and electric system |
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| CN1588773A (en) * | 2004-07-08 | 2005-03-02 | 浙江大学 | Boost type active interlaced parallel soft switch circuit |
| US20080019154A1 (en) * | 2004-03-12 | 2008-01-24 | Comarco Wireless Technologies, Inc. | Power factor correction control circuit |
| CN201532826U (en) * | 2009-10-20 | 2010-07-21 | 青岛菲特电器科技有限公司 | Amorphous-alloy iron-core magnetically controlled reactor |
| CN102324841A (en) * | 2011-09-23 | 2012-01-18 | 重庆大学 | A Multi-input High-Gain Boost Converter |
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2013
- 2013-11-06 CN CN201310546110.3A patent/CN103532386A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6084790A (en) * | 1999-01-07 | 2000-07-04 | Astec International Limited | Circuit to ensure equal current sharing and switching losses between parallel power devices |
| CN1428922A (en) * | 2001-12-28 | 2003-07-09 | 深圳市中兴通讯股份有限公司上海第二研究所 | Power factor correction method and its equipment |
| US20080019154A1 (en) * | 2004-03-12 | 2008-01-24 | Comarco Wireless Technologies, Inc. | Power factor correction control circuit |
| CN1588773A (en) * | 2004-07-08 | 2005-03-02 | 浙江大学 | Boost type active interlaced parallel soft switch circuit |
| CN201532826U (en) * | 2009-10-20 | 2010-07-21 | 青岛菲特电器科技有限公司 | Amorphous-alloy iron-core magnetically controlled reactor |
| CN102324841A (en) * | 2011-09-23 | 2012-01-18 | 重庆大学 | A Multi-input High-Gain Boost Converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736712A (en) * | 2017-04-20 | 2018-11-02 | 威士多公司 | Electric power converter and electric system |
| US10742036B2 (en) | 2017-04-20 | 2020-08-11 | Danfoss Editron Oy | Power converter and an electric power system |
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Inventor after: Jiang Shijun Inventor after: Mao Yiping Inventor after: Peng Zaiwu Inventor after: Wang Jian Inventor before: Mao Yiping Inventor before: Peng Zaiwu Inventor before: Wang Jian |
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