CN105553047A - Vehicle charger circuit and vehicle charger - Google Patents

Vehicle charger circuit and vehicle charger Download PDF

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Publication number
CN105553047A
CN105553047A CN201610102808.XA CN201610102808A CN105553047A CN 105553047 A CN105553047 A CN 105553047A CN 201610102808 A CN201610102808 A CN 201610102808A CN 105553047 A CN105553047 A CN 105553047A
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CN
China
Prior art keywords
capacitor
supply input
onboard charger
circuit
filtering part
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201610102808.XA
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Chinese (zh)
Inventor
曾元清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN201610102808.XA priority Critical patent/CN105553047A/en
Publication of CN105553047A publication Critical patent/CN105553047A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • 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
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The embodiment of the invention discloses a vehicle charger circuit and a vehicle charger belonging to the charging circuit technical field. The vehicle charger circuit comprises a direct current power supply input end, a direct current-direct current DC-DC converter and a load power supply end connected to the DC-DC converter. A conductive suppression circuit is connected between the direct current power supply input end and the DC-DC converter; the conductive suppression circuit is used for filtering harmonic waves. The conductive suppression circuit can filter the harmonic waves, especially the high frequency harmonic waves conducted from the DC-DC converter side; the harmonic waves may come from the DC-DC converter and the power consumption equipment connected with the load power supply end; the harmonic waves are effectively prevented from being serial in a power grid through the direct current power supply input end to damage the power grid.

Description

A kind of onboard charger circuit and onboard charger
Technical field
The present invention relates to charging circuit technical field, be specifically related to a kind of onboard charger circuit and onboard charger.
Background technology
Along with the development of automobile industry, have the user of car to get more and more, onboard charger and then appearred in market, the user of onboard charger user to the charging of other portable set, thus very popular.
To in the research and practice process of prior art, the present inventor finds, in the circuit of onboard charger, input power is directly added to step-down IC (integratedcircuit, integrated circuit) input, cause the humorous wave interference to vehicle power like this, affect other power consumption equipment, and power output is larger, the harmonic wave interference effect caused is larger.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can the onboard charger circuit of harmonic carcellation and onboard charger.
The object of the invention is to be achieved through the following technical solutions: a kind of onboard charger circuit, comprise DC supply input, DC/DC dc-dc, the load supplying end be electrically connected with described dc-dc, between described DC supply input and dc-dc, be connected with conduction suppress circuit, described conduction suppresses circuit to be used for filtering harmonic wave.
Further, described conduction suppresses circuit to comprise:
At least one filtering part, its one end is connected with described DC supply input, and the other end is connected with described dc-dc, and described filtering part is used for filtering high-frequency harmonic;
At least one Capacitor banks, it comprises at least one capacitor, described capacitor one end is connected between the positive pole of described DC supply input and described dc-dc, and the other end of described capacitor is connected between the negative pole of described DC supply input and described dc-dc.
Conduction suppresses the filtering part of circuit can filtering high-frequency harmonic, direct current is allowed to pass through, and the characteristic of electric capacity is logical high frequency, resistance low frequency and direct current, thus Capacitor banks can be used for absorbing, filtering harmonic wave, thus conduction suppresses circuit can conduct the harmonic wave of coming in filtering dc-dc side, and in moment of automotive ignition, the effect absorbing spike interference can also be played, avoid occurring sparking.
Further, described filtering part comprises the first filtering part and the second filtering part, described first filtering part one end is connected with the positive pole of described DC supply input, the other end of described first filtering part connects dc-dc, one end of described second filtering part connects the negative pole of described DC supply input, and the other end of described second filtering part connects the earth terminal of common ground end, described dc-dc.
The harmonic direction produced because of dc-dc is unfixed; sometimes electrical network is scurried into from the positive pole of DC supply input; sometimes electrical network is scurried into from the negative pole of DC supply input; so after the two ends of DC supply input all connect filtering part; can filtering harmonic wave better, to protect the electrical network of direct current source.
Further, described Capacitor banks comprises:
First Capacitor banks, it comprises at least one capacitor, and one end of the capacitor of described first Capacitor banks is connected with the positive pole of described DC supply input, and the other end of the capacitor of described first Capacitor banks is connected with the negative pole of described DC supply input;
Second Capacitor banks, it comprises at least one capacitor, one end of the capacitor of described second Capacitor banks is connected with the input of described dc-dc, and the other end of the capacitor of described second Capacitor banks is connected with the earth terminal of described common ground end, described dc-dc.
First Capacitor banks and the second Capacitor banks can be used for absorption, filtering harmonic wave, thus conduction suppresses circuit can conduct the harmonic wave of coming in filtering dc-dc side, and in the moment of automotive ignition, the effect absorbing spike interference can also be played, avoid occurring sparking; In filtering part both sides, capacitor is set simultaneously, the effect of filtering harmonic wave will be more excellent, and all right storage of electrical energy of the second Capacitor banks, when the load supplying end of this onboard charger circuit connects heavy load, the second Capacitor banks can provide electric energy for this heavy load.
Further, described filtering part is magnetic bead.
The use of magnetic bead can make to conduct and suppress the volume of circuit less, thus make the volume of this onboard charger circuit less, more can optimize the interior spatial structure of the onboard charger using this circuit like this, make this onboard charger can have more design, allow this onboard charger design more portable.
Further, described magnetic bead is the magnetic bead of AV-E specification.
The volume of the magnetic bead of AV-E specification is less, optimizes the interior spatial structure of the onboard charger using this circuit further, simultaneously, after using the magnetic bead of this AV-E specification, the impedance of conduction suppression circuit can be less, can be less than the impedance of 0.010Ohm, like this, the temperature rise of circuit is better.
Further, the frequency-impedance slope curve of described magnetic bead is corresponding with the harmonic frequency of described dc-dc.
Because the type of dc-dc is different, its humorous wave frequency produced is also different, by in the fabrication stage, the harmonic frequency that test dc-dc produces, the magnetic bead of AV-E specification of respective frequencies-impedance slope curve is selected again according to this harmonic frequency, conduction so just can be made to suppress circuit to have more excellent filter effect, and reduce the use amount of magnetic bead, cost-saving.
Further, the ferrite of the magnetic bead of described AV-E specification comprises iron oxide, nickel oxide, zinc oxide, cupric oxide, copper cash, and the proportion of wherein said ferritic iron oxide, nickel oxide, zinc oxide, cupric oxide, copper cash is 50%, 14.5%, 20%, 15%, 0.5%.
Such magnetic bead, by larger electric current under relatively small size.
Further, described first Capacitor banks comprises four capacitors parallel with one another, and described second Capacitor banks comprises a capacitor.
The quantity increasing capacitor can filter out harmonic wave better, reaches better inhibition.Because of the limited space of dc-dc and filtering part, a capacitor is set at the second Capacitor banks place, so both can plays the effect of filtering harmonic wave, also can reduce cost, with the space on Appropriate application circuit.
Also relate to a kind of onboard charger, it comprises, onboard charger circuit as above.
Relative to prior art, onboard charger circuit of the present invention and onboard charger, after the direct current of DC supply input conducts to DC/DC dc-dc, dc-dc carries out transformation process to this electric current, and the electric current through transformation process is sent to load supplying end, to power to external equipment, between DC supply input and dc-dc, connect conduction suppress circuit, conduction suppresses circuit can filtering harmonic wave, especially the high-frequency harmonic of coming is conducted in dc-dc side, wherein, this harmonic wave can come as dc-dc and the power consumption equipment that is connected with load supplying end, so just can harmonic wave be effectively avoided to seal in electrical network by DC supply input, prevent from causing the infringement to electrical network.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of onboard charger circuit that the embodiment of the present invention provides;
Fig. 2 is the physical circuit figure of a kind of onboard charger circuit that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of onboard charger circuit and onboard charger.Below with reference to accompanying drawing, the present invention is described in detail.
Fig. 1 is the structural representation of a kind of onboard charger circuit that the embodiment of the present invention provides.The onboard charger circuit of the present embodiment, comprise DC supply input 1, conduction suppresses circuit 4, DC/DC dc-dc 2, the load supplying end 3 be electrically connected with dc-dc, conduction suppresses one end of circuit 4 to connect DC supply input 1, and conduction suppresses the other end of circuit 4 to be connected with dc-dc 2, and conduction suppresses circuit 4 for filtering harmonic wave.
DC supply input 1 can input the direct voltage of 12 to 24V to dc-dc 2, and the power source of DC supply input is in the power supply of the equipment such as automobile.Dc-dc 2 i.e. DC chopper, the conversion of voltage can be carried out, during its normal operation, work under high frequency state, frequency 100Khz ~ 1.2Mhz scope is arranged, at PWM mode PWM (pulsewidemodulation), pulse frequency modulated pattern PFM (pulsefrequencymodulation) or PWM/PFM MODE of operation, can produce a series of harmonic wave.Load supplying end 3 can be connected with power consumption equipment, thus gives the charging of this power consumption equipment.This power consumption equipment can be mobile phone, panel computer etc. equipment.Conduction suppresses circuit 4 for filtering harmonic wave, and especially conduct the high-frequency harmonic of coming from dc-dc side, the source of this harmonic wave comprises, the harmonic wave that dc-dc produces and the harmonic wave produced by the power consumption equipment that load supplying end 3 seals in.
The onboard charger circuit of the present embodiment, after the direct current of DC supply input 1 conducts to DC/DC dc-dc 2, dc-dc 2 carries out transformation process to this electric current, and the electric current through transformation process is sent to load supplying end 3, to power to external equipment, between DC supply input 1 and dc-dc 2, connect conduction suppress circuit, conduction suppresses circuit can filtering harmonic wave, especially the high-frequency harmonic of coming is conducted in dc-dc side, wherein, this harmonic wave can come as dc-dc and the power consumption equipment that is connected with load supplying end, so just can harmonic wave be effectively avoided to seal in electrical network by DC supply input, prevent from causing the infringement to electrical network.
Alternatively, conduction suppresses circuit to comprise:
Filtering part, its one end is connected with DC supply input, and the other end is connected with dc-dc, and filtering part is used for filtering high-frequency harmonic;
Capacitor banks, it comprises at least one capacitor, and capacitor one end is connected between the positive pole of DC supply input and dc-dc, and the other end of capacitor is connected between the negative pole of DC supply input and dc-dc.
Wherein, this filtering part can be the electronics such as magnetic bead or common mode inductance device.Capacitor banks can have one group, also can have many groups, and the capacitor in the Capacitor banks of each group is parallel with one another.
Conduction suppresses the filtering part of circuit can filtering high-frequency harmonic, direct current is allowed to pass through, and the characteristic of electric capacity is logical high frequency, resistance low frequency and direct current, thus Capacitor banks can be used for absorbing, filtering harmonic wave, thus conduction suppresses circuit can conduct the harmonic wave of coming in filtering dc-dc side, and in moment of automotive ignition, the effect absorbing spike interference can also be played, avoid occurring sparking.
Alternatively, filtering part comprises the first filtering part and the second filtering part, first filtering part one end is connected with the positive pole of DC supply input, the other end of the first filtering part connects the input of dc-dc, one end of second filtering part connects the negative pole of DC supply input, and the other end of the second filtering part connects the earth terminal of common ground end, dc-dc.
The harmonic direction produced because of dc-dc is unfixed; sometimes electrical network is scurried into from the positive pole of DC supply input; sometimes electrical network is scurried into from the negative pole of DC supply input; so after the two ends of DC supply input all connect filtering part; can filtering harmonic wave better, to protect the electrical network of direct current source.
Alternatively, Capacitor banks comprises:
First Capacitor banks, it comprises at least one capacitor, and one end of the capacitor of the first Capacitor banks is connected with the positive pole of DC supply input, and the other end of the capacitor of the first Capacitor banks is connected with the negative pole of DC supply input;
Second Capacitor banks, it comprises at least one capacitor, and one end of the capacitor of the second Capacitor banks is connected with the input of dc-dc, and the other end of the capacitor of the second Capacitor banks is connected with the earth terminal of common ground end, dc-dc.
First Capacitor banks and the second Capacitor banks can be used for absorption, filtering harmonic wave, thus conduction suppresses circuit can conduct the harmonic wave of coming in filtering dc-dc side, and in the moment of automotive ignition, the effect absorbing spike interference can also be played, avoid occurring sparking; In filtering part both sides, capacitor is set simultaneously, the effect of filtering harmonic wave will be more excellent, and all right storage of electrical energy of the second Capacitor banks, when the load supplying end of this onboard charger circuit connects heavy load, the second Capacitor banks can provide electric energy for this heavy load.
Be appreciated that, arranging while first Capacitor banks and the second Capacitor banks is more excellent embodiment, but restriction is not formed to the present invention, in another embodiment, can not arrange capacitor in onboard charger circuit, that is, conduction suppresses circuit only to arrange the filtering part magnetic bead be connected with DC supply input, also only the first Capacitor banks or the second Capacitor banks can be set on circuit, as long as this conduction suppresses circuit can have harmonic wave absorb filtration result.
With reference to the physical circuit figure that figure 1 and Fig. 2, Fig. 2 are a kind of onboard charger circuit that the embodiment of the present invention provides.As shown in Figure 2, conduction suppresses circuit 4 to comprise magnetic bead BEAD1 and BEAD2, and electric capacity C1, C2, C3, C4, C5.Wherein, electric capacity C1 to C4 is parallel with one another, and one end of the arbitrary electric capacity of electric capacity C1 to C4 is connected with the positive pole of DC supply input, the other end is connected with the negative pole of DC supply input, one end of magnetic bead BEAD1 is connected with the positive pole of DC supply input, its other end is connected with the input of dc-dc, one end of magnetic bead BEAD2 is connected with the negative pole of DC supply input, its other end and common ground end, the earth terminal of dc-dc connects, electric capacity C5 one end and magnetic bead BEAD1, dc-dc connects, the electric capacity C5 other end and magnetic bead BEAD2, common ground end connects, the input of dc-dc is connected with magnetic bead BEAD1, direct current conducts to dc-dc from the positive pole of DC supply input by magnetic bead BEAD1, the output of dc-dc is electrically connected with load supplying end VBUS, load supplying end VBUC is that power consumption equipment is powered.The earth terminal of dc-dc connects common ground end, one end of capacitor C5, one end of magnetic bead BEAD2.
The course of work of the present invention is: direct current inputs from the positive pole of DC supply input 1, dc-dc 2 is conducted to after nondestructively suppressing circuit 4 by conduction, dc-dc 2 carries out step-down to the circuit imported into from its input, then the electric current entering transformation is sent to load supplying end VBUS, for the power consumption equipment be connected with load supplying end VBUS is powered.In the course of the work, dc-dc 2 works under high frequency state, frequency 100Khz ~ 1.2Mhz scope can be arranged, at PWM, PFM or pwm/pfm MODE of operation, it can produce a series of harmonic wave, by the input circuit of power supply, electrical network can be sealed in, cause the infringement to electrical network, and/or the harmonic wave of power consumption equipment can seal in electrical network by load supplying end VBUS, causes and damages the harmonic wave of electrical network.Being arranged on conduction between DC supply input and dc-dc suppresses circuit can the aforementioned two kinds of harmonic waves of filtering, prevents harmonic wave by the input circuit of DC power supply, seals in electrical network, avoid harmonic wave infringement.
Particularly, the capacitor C1 to C4 be connected with positive pole and the negative pole of DC supply input 1, it is the first Capacitor banks, the capacitor of this first Capacitor banks is parallel with one another, and one end of its arbitrary capacitor is connected with the positive pole of DC supply input, the other end of the capacitor of the first Capacitor banks is connected with the negative pole of DC supply input 1.In the present embodiment, the first Capacitor banks comprises four capacitors, and the present invention does not form restriction to this, preferably, can increase the number of the capacitor of the first Capacitor banks to reach better harmonic suppression effect.C5 is the second Capacitor banks, and one end of the capacitor of the second Capacitor banks is connected with the input of dc-dc 2, and the other end of the capacitor of the second Capacitor banks is connected with common ground end.In the present embodiment, the second Capacitor banks only has a capacitor C5, and the present invention does not form restriction to this, preferably, can increase the number of the capacitor of the second Capacitor banks to reach better harmonic suppression effect, now, the capacitor of the second Capacitor banks is parallel with one another.In the present embodiment, because of the limited space between dc-dc 2 and magnetic bead, therefore a capacitor is set at the second Capacitor banks place, so both can plays the effect of filtering harmonic wave, also can reduce cost, with the space on Appropriate application circuit.It is logical high frequency that above-mentioned capacitor has, resistance low frequency and the characteristic of direct current, for absorbing, and filtering harmonic wave thus filtering high-frequency harmonic can be stored.Wherein, above-mentioned capacitor can be multi-layer ceramic sheet type specification.
Magnetic bead BEAD1 as shown in Figure 2 and magnetic bead BEAD2, can the passing through of attenuate high frequency harmonic wave, and the characteristic of magnetic bead leads to low frequency, resistance high frequency, DC power supply is harmless to be passed through, and positive-negative power line has been connected one respectively, stops decay harmonic wave to be transmitted to the magnetic bead of power supply positive and negative terminal.Such conduction suppresses circuit just to serve the effect suppressing conduction interference.The harmonic direction produced because of dc-dc 2 is unfixed; sometimes electrical network is scurried into from the positive pole of DC supply input; sometimes electrical network is scurried into from the negative pole of DC supply input; so after the two ends of DC supply input all connect filtering part; can filtering harmonic wave better, to protect the electrical network of direct current source.Simultaneously, the use of magnetic bead can make to conduct and suppress the volume of circuit less, thus make the volume of this onboard charger circuit less, more can optimize the interior spatial structure of the onboard charger using this circuit like this, make this onboard charger can have more design, allow this onboard charger design more portable.
Certainly, also only magnetic bead can be connected at the negative or positive electrode of DC supply input, namely only suppress circuit arranges a magnetic bead in conduction, so also can play the certain filtration result to harmonic wave, but the effect of such scheme does not have the effective of scheme as shown in Figure 2.
Preferably, magnetic bead is the magnetic bead of AV-E specification.The volume of the magnetic bead of AV-E specification is less, optimizes the interior spatial structure of the onboard charger using this circuit further, simultaneously, after using the magnetic bead of this AV-E specification, the impedance of conduction suppression circuit can be less, can be less than the impedance of 0.010Ohm, like this, the temperature rise of circuit is better.
Preferably, the frequency-impedance slope curve of the magnetic bead of AV-E specification is corresponding with the harmonic frequency of dc-dc 2.Because the type of dc-dc 2 is different, its humorous wave frequency produced is also different, by in the fabrication stage, the harmonic frequency that test dc-dc produces, select the magnetic bead of AV-E specification of respective frequencies-impedance slope curve again according to this harmonic frequency, conduction just can be made to suppress circuit to have more excellent filter effect.
Preferably, the ferrite of the magnetic bead of AV-E specification comprises iron oxide, nickel oxide, zinc oxide, cupric oxide, copper cash, and wherein the proportion of this ferritic iron oxide, nickel oxide, zinc oxide, cupric oxide, copper cash is 50%, 14.5%, 20%, 15%, 0.5%.Such magnetic bead, by larger electric current under relatively small size.
When conduct suppress circuit be common mode inductance and electric capacity form ∏ type filter circuit time, although it also has the effect of filtering harmonic wave, but, the inductance value of common mode inductance is more than (mH) bold and unconstrained prosperous rank, the development of big screen intelligent mobile phone is a kind of trend, power consumption is in increase, the power output of onboard charger also follows suit and increases greatly, the development of recently filling soon also becomes a kind of trend, consider design margin, power output is between 15 ~ 25W, also be a kind of conventional design, now the volume of common mode inductance at least reaches ￠ 10X more than ￠ 12mm, under so large volume, onboard charger is requiring that outward appearance is small and exquisite, when exquisite, increase difficulty to the design of product maybe can not realize.So in preferred scheme, conduction suppresses circuit to use magnetic bead, the volume of this onboard charger circuit can be allowed less, more can optimize the interior spatial structure of the onboard charger using this circuit like this, make this onboard charger can have more design, allow this onboard charger design more portable.
In order to state the present embodiment better, existing to the embodiment shown in Fig. 2, then be described:
In normal operating conditions, dc-dc 2 works under high frequency state, and frequency 100Khz ~ 1.2Mhz scope can be arranged, at PWM, PFM or PWM, / PFM MODE of operation, can produce a series of harmonic wave, by the input circuit of power supply, seal in electrical network, cause the infringement to electrical network, the harmonic wave of power consumption equipment also can be avoided to seal in electrical network by load supplying end VBUS simultaneously, cause harmonic wave to damage.
In order to avoid harmonic wave infringement, circuit with the addition of conduction and suppress circuit, by electronics device BEAD1, BEAD2, C1, C2, C3, C4, C5 forms, harmful harmonic wave causes damage to electrical network in the mode of conduction on power line both positive and negative polarity, multi-layer ceramic sheet type high frequency capacitor C1, C2, C3, C4, C5 is used for absorbing, filtering harmonic wave, the characteristic of capacitor is logical high frequency, resistance low frequency and direct current, the magnetic bead BEAD1 of small size AV-E material, BEAD2 hinders, passing through of attenuate high frequency harmonic wave, the characteristic of magnetic bead leads to low frequency, resistance high frequency, DC power supply is harmless to be passed through, a prevention decay harmonic wave that positive-negative power line has been connected respectively is transmitted to the magnetic bead of power supply positive and negative terminal.Such conduction suppresses circuit just to serve the effect suppressing conduction interference.Can increase shunt capacitor C1, the number of C2, C3, C4 reaches better inhibition, also can select the magnetic bead of different frequency-impedance slope curve AV-E specification, to the suppression of different frequency harmonic wave.
In sum, scheme as shown in Figure 2, it has following effect:
1, the common mode inductance of large volume can be replaced with the magnetic bead of small size two AV-E materials;
2, the ferrite of the magnetic bead of AV-E is by iron oxide, nickel oxide. zinc oxide. and cupric oxide, copper cash is according to different specific weight formula composition, roughly as follows: 50%, 14.5%, 20%, 15%, 0.5%, as shown in Figure 2, by larger electric current under relatively small size;
3, effectively can suppress conduction interference, avoid harmonic wave to the infringement of electrical network;
4, product ting model, exquisite appearance becomes possibility;
5, be less than the impedance of 0.010Ohm, the temperature rise of circuit is better;
6., circuit can apply in a flexible way, and for the interference of different harmonic frequency, can adjust different parameters, reach the requirement meeting respective standard;
7, in the moment of automotive ignition, the effect absorbing spike interference can also be played, avoid occurring sparking.
Also provide a kind of embodiment of onboard charger, it comprises above-mentioned onboard charger circuit, and namely this onboard charger can manufacture and form in the scheme of above-mentioned onboard charger circuit.Therefore, just the onboard charger circuit of onboard charger is not repeated here.Use the onboard charger of above-mentioned onboard charger circuit also to have above-mentioned beneficial effect, do not repeat them here.
Above content is made for the present invention specifically 15 bright further in conjunction with concrete preferred implementation, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.

Claims (10)

1. an onboard charger circuit, comprise DC supply input, DC/DC dc-dc, the load supplying end be electrically connected with described dc-dc, it is characterized in that, between described DC supply input and dc-dc, be connected with conduction suppress circuit, described conduction suppresses circuit to be used for filtering harmonic wave.
2. onboard charger circuit according to claim 1, is characterized in that, described conduction suppresses circuit to comprise:
At least one filtering part, its one end is connected with described DC supply input, and the other end is connected with described dc-dc, and described filtering part is used for filtering high-frequency harmonic;
At least one Capacitor banks, it comprises at least one capacitor, described capacitor one end is connected between the positive pole of described DC supply input and described dc-dc, and the other end of described capacitor is connected between the negative pole of described DC supply input and described dc-dc.
3. onboard charger circuit according to claim 2, it is characterized in that, described filtering part comprises the first filtering part and the second filtering part, described first filtering part one end is connected with the positive pole of described DC supply input, the other end of described first filtering part connects the input of described dc-dc, one end of described second filtering part connects the negative pole of described DC supply input, and the other end of described second filtering part connects the earth terminal of common ground end, described dc-dc.
4. onboard charger circuit according to claim 2, is characterized in that, described Capacitor banks comprises:
First Capacitor banks, it comprises at least one capacitor, and one end of the capacitor of described first Capacitor banks is connected with the positive pole of described DC supply input, and the other end of the capacitor of described first Capacitor banks is connected with the negative pole of described DC supply input;
Second Capacitor banks, it comprises at least one capacitor, one end of the capacitor of described second Capacitor banks is connected with the input of described dc-dc, and the other end of the capacitor of described second Capacitor banks is connected with the earth terminal of described common ground end, described dc-dc.
5. onboard charger circuit according to claim 2, is characterized in that, described filtering part is magnetic bead.
6. onboard charger circuit according to claim 5, is characterized in that, described magnetic bead is the magnetic bead of AV-E specification.
7. onboard charger circuit according to claim 5, is characterized in that, the frequency-impedance slope curve of described magnetic bead is corresponding with the harmonic frequency of described dc-dc.
8. circuit according to claim 6, it is characterized in that, the ferrite of the magnetic bead of described AV-E specification comprises iron oxide, nickel oxide, zinc oxide, cupric oxide, copper cash, the proportion of wherein said ferritic iron oxide, nickel oxide, zinc oxide, cupric oxide, copper cash is 50%, 14.5%, 20%, 15%, 0.5%.
9. onboard charger circuit according to claim 4, is characterized in that, described first Capacitor banks comprises four capacitors parallel with one another, and described second Capacitor banks comprises a capacitor.
10. an onboard charger, is characterized in that, described onboard charger comprises the onboard charger circuit as described in claim as arbitrary in claim 1 to 9.
CN201610102808.XA 2016-02-24 2016-02-24 Vehicle charger circuit and vehicle charger Pending CN105553047A (en)

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Citations (4)

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CN203423622U (en) * 2013-08-30 2014-02-05 奇瑞汽车股份有限公司 Vehicle-mounted mobile phone wireless charger voltage-stabilized power supply
US20150021994A1 (en) * 2013-07-18 2015-01-22 The Boeing Company Power converter having emi filter common to multiple converters
CN204272243U (en) * 2014-12-30 2015-04-15 浙江大华技术股份有限公司 A kind of analog video systems
CN104659774A (en) * 2015-02-11 2015-05-27 深圳市航盛电子股份有限公司 Low-voltage input power supply port protection circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150021994A1 (en) * 2013-07-18 2015-01-22 The Boeing Company Power converter having emi filter common to multiple converters
CN203423622U (en) * 2013-08-30 2014-02-05 奇瑞汽车股份有限公司 Vehicle-mounted mobile phone wireless charger voltage-stabilized power supply
CN204272243U (en) * 2014-12-30 2015-04-15 浙江大华技术股份有限公司 A kind of analog video systems
CN104659774A (en) * 2015-02-11 2015-05-27 深圳市航盛电子股份有限公司 Low-voltage input power supply port protection circuit

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