CN203206112U - Vehicle voltage-stabilizing circuit - Google Patents
Vehicle voltage-stabilizing circuit Download PDFInfo
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- CN203206112U CN203206112U CN 201320143835 CN201320143835U CN203206112U CN 203206112 U CN203206112 U CN 203206112U CN 201320143835 CN201320143835 CN 201320143835 CN 201320143835 U CN201320143835 U CN 201320143835U CN 203206112 U CN203206112 U CN 203206112U
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Abstract
The utility model provides a vehicle voltage-stabilizing circuit comprising a voltage converting circuit, a switch circuit, and a pulse width modulator, wherein the voltage converting circuit is used for boosting and stabilizing voltage output by a vehicle-mounted low voltage battery when an engine is started, the switch circuit is used for transmitting energy of the low voltage battery to a load when a vehicle is in a normal state, the pulse width modulator is used for driving and control work of the voltage converting circuit which is connected between the low voltage battery and the load, a controlled end of the voltage converting circuit is electrically connected with the pulse width modulator, switch circuit is connected between the low voltage battery and the load, and a controlled end of the switch circuit is electrically connected with a start and stop signal output end of the engine. The vehicle voltage-stabilizing circuit provided by the utility model can enable a vehicle-mounted load to obtain a stable and reliable low voltage source all the time, and therefore a vehicle-mounted low voltage electric appliance is enabled to work in a normal and stable manner all the time.
Description
Technical field
The utility model relates to a kind of stabilizing circuit, relates in particular to a kind of automobile-used voltage stable circuit.
Background technology
Along with the raising of people's living standard, popularizing of automobile is more and more extensive.Usually be provided with start stop system on the existing automobile, it can control engine be opened timely according to people's operating position or stops.
Vehicle complete vehicle has two kinds of power-supply systems usually, and is a kind of for the low voltage electric power system of low pressure source is provided by A-battery, for example, and storage battery; A kind of for the high voltage power supply of high voltage source is provided by high-tension battery, for example, iron cell.There is a large amount of electronic devices to provide driving voltage by low pressure source in the automobile.For example, onboard instruments, broadcast receiver, vehicle mounted guidance etc., it needs tens volts voltage to drive usually, for example is generally the driving voltage of 12V.Common low voltage electric power system by automobile is that A-battery is to the low-voltage load power supply of automobile in the prior art.
But after vehicle increased start stop system, engine was when frequent starting, especially in moment that engine has just started, it can cause battery tension moment to drag down, and causes low-voltage load power down or the operation irregularity such as instrument, broadcast receiver, navigation of rear end, and then affects user's normal use.Usually at engine start storage battery provides a period of time of after or behind the engine stop just is that stable voltage is to drive low-voltage load.Therefore, prior art mesolow power-supply system can not guarantee to provide stable voltage to the rear end low-voltage load when the engine frequent starting.
Be understandable that, the statement of this part only provides the background information relevant with the utility model, may consist of or not consist of so-called prior art.
Summary of the invention
Technical problem to be solved in the utility model is to be difficult to provide to vehicle-mounted low-voltage load when the frequent starting for automobile in the prior art defective of burning voltage, and providing a kind of can be always provide the automobile-used voltage stable circuit of stable voltage to vehicle-mounted low-voltage load.
The technical scheme that its technical problem that solves the utility model adopts provides a kind of automobile-used voltage stable circuit, and it comprises: when engine start, the voltage of vehicle-mounted A-battery output boosted and voltage stabilizing after pass to the voltage conversion circuit of load, when being used for car and being in the normal state the energy of described A-battery is passed to load switching circuit, and be used for driving the pulse width modulator of the described voltage conversion circuit work of control; Described voltage conversion circuit is connected between A-battery and the load, and the controlled end of described voltage conversion circuit is electrically connected with described pulse width modulator; Described switching circuit is connected between A-battery and the load, and the controlled end of described switching circuit is electrically connected with the start stop signal output of engine.
In above-mentioned automobile-used voltage stable circuit, described switching circuit comprises normally closed relay K 1 and the first switching tube; The collector electrode of described the first switching tube or drain electrode connect the positive pole of described A-battery by the coil of relay, its emitter or source ground, its base stage or grid connect described start stop signal output, and one group of contact of described relay connects respectively positive pole and the load of A-battery.
In above-mentioned automobile-used voltage stable circuit, described the first switching tube is triode or field effect transistor.
In above-mentioned automobile-used voltage stable circuit, described the first switching tube is NPN type triode.
In above-mentioned automobile-used voltage stable circuit, described voltage conversion circuit comprises capacitor C 1, C2, inductance L 1, diode D1, reaches second switch pipe Q1; Wherein, the positive pole of A-battery is by the anodic bonding of inductance L 1 with diode D1, and the negative electrode of diode D1 connects load, and capacitor C 1 is connected between the positive pole and ground of battery, and capacitor C 2 is connected between the negative electrode and ground of diode D1; Base stage or the grid of second switch pipe Q1 connect described pulse width modulator, its emitter or source ground, and its collector electrode or drain electrode connect the anode of diode D1.
In above-mentioned automobile-used voltage stable circuit, described second switch pipe Q1 is field effect transistor or insulated gate bipolar transistor.
In above-mentioned automobile-used voltage stable circuit, described pulse width modulator is electrically connected with described load simultaneously.
In above-mentioned automobile-used voltage stable circuit, described pulse width modulator is pulse width modulating chip MAX15005B.
In above-mentioned automobile-used voltage stable circuit, described A-battery is storage battery.
The automobile-used voltage stable circuit that the utility model provides is mainly by increasing switch loop and voltage conversion circuit between A-battery and load, connect respectively low-voltage load when being in different states at automobile to power to low-voltage load.Under the control of the start stop signal of engine and pulse width modulator, the voltage conversion circuit that is connected between A-battery and the load is connected A-battery and low-voltage load in the moment of engine start, and the voltage that voltage conversion circuit provides A-battery boosts and voltage stabilizing; When the engine start certain hour was stablized rear or engine stop, this stabilizing circuit was connected A-battery and load by the switch loop, and then A-battery is directly powered to low-voltage load.So the energy that the voltage stable circuit that the utility model provides can be provided A-battery by different branch roads is used for driving low-voltage load, and guarantee that low-voltage load can obtain required stable driving voltage always under different situations.
Description of drawings
Fig. 1 is the theory diagram of an embodiment who is applied to load of the automobile-used voltage stable circuit that provides of the utility model;
Fig. 2 is the circuit theory diagrams of a preferred embodiment of the automobile-used voltage stable circuit that provides of the utility model;
Fig. 3 is the structural representation that automobile-used voltage stable circuit that the utility model provides is applied to an embodiment of low-voltage load.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
In description of the present utility model, it will be appreciated that, term " vertically ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only be for convenience of description the utility model and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
The automobile-used voltage stable circuit that the utility model provides is mainly realized being powered to low-voltage load in different situations respectively by two branch roads by switching circuit, voltage conversion circuit and pulse width modulator, and then so that low-voltage load can obtain its required stable voltage always.
To shown in Figure 3, the automobile-used voltage stable circuit that the utility model provides mainly comprises referring to Fig. 1: voltage conversion circuit 2, switching circuit 1, and pulse width modulator 3.Wherein, voltage conversion circuit 2 is connected between A-battery 4 and the load 5, and the controlled end of described voltage conversion circuit 2 is electrically connected with described pulse width modulator 3.Switching circuit 1 is connected between A-battery 4 and the load 5, and the controlled end of described switching circuit 1 is electrically connected with the start stop signal output of engine.Switching circuit 1 is controlled by the start stop signal of engine, when automobile is in the normal state, being engine start, a period of time rear engine has been in stable operating state or the two states behind the engine stop, the voltage that A-battery 4 provides under this two states can be affected hardly, be that A-battery 4 can provide stable voltage to low-voltage load 5 this moment, therefore be in closure state under switching circuit 1 normality, be directly passed to low-voltage load 5 with the energy that A-battery 4 is provided.Voltage conversion circuit 2 be used for voltage that initial stage of engine start will 4 outputs of vehicle-mounted A-battery boost with voltage stabilizing after pass to load 5.Because in the moment of engine start, the voltage of A-battery 4 can be dragged down usually, so the boost in voltage that voltage conversion circuit 2 provides A-battery 4 and stable output one fixed voltage are for low-voltage load 5 power supplies.Mainly by the start stop signal decision of engine, namely the start stop signal of engine connects the controlled end of switching circuit 1 to the break-make of switching circuit 1, to change the on off operating mode of switching circuit 1.When the moment of engine start, the start stop signal of engine is so that switching circuit 1 disconnection, then A-battery 4, voltage conversion circuit 2 and load 5 form the loop, therefore the energy of A-battery 4 output is boosted by voltage conversion circuit 2 first and is passed to load 5 after stable again, therefore load 5 can get access to stable voltage source always.
In preferred embodiment of the present utility model, switching circuit 1 comprises normally closed relay K 1 and the first switching tube; The collector electrode of described the first switching tube or drain electrode connect the positive pole of described A-battery 4 by relay, its emitter or source ground, its base stage or grid connect described start stop signal output, and one group of contact of described relay connects respectively positive pole and the load 5 of A-battery 4.Because relay is normally off, thus during normality one group of contact of switching circuit 1 repeat circuit so that A-battery 4 powers directly for load 5.When engine start moment, the start stop signal S1 of engine is so that the connection of the first switching tube, then the coil of relay gets electric, and then one group of contact of relay disconnects, therefore switching circuit 1 is in off-state, then A-battery 4, voltage conversion circuit 2, and load 5 form loops, offer load 5 after the boost in voltage that namely this moment battery is provided by the phone change-over circuit is stable.Preferably, the first switching tube is triode or field effect transistor, and it is the start stop signal of responding engine fast.More preferably, the first switching tube is NPN type triode, the lower and fast response time of its cost.
In preferred embodiment of the present utility model, voltage conversion circuit comprises capacitor C 1, C2, inductance L 1, diode D1, reaches second switch pipe Q1; Wherein, the positive pole of A-battery is by the anodic bonding of inductance L 1 with diode D1, and the negative electrode of diode D1 connects load, and capacitor C 1 is connected between the positive pole and ground of battery, and capacitor C 2 is connected between the negative electrode and ground of diode D1; Base stage or the grid of second switch pipe Q1 connect described pulse width modulator, its emitter or source ground, and its collector electrode or drain electrode connect the anode of diode D1.Wherein, pulse width modulator is being controlled the break-make of second switch pipe Q1, and voltage conversion circuit can be exported battery
Magnitude of voltage increases and makes the magnitude of voltage of its stable output.Wherein, capacitor C 1, C2 are generally polar capacitor.The second switch pipe is preferably field effect transistor (being metal-oxide-semiconductor) or insulated gate bipolar transistor (being the IGBT pipe), and its switching tube that can avoid other is because the interference that afterflow brings to whole loop.
Refer again to Fig. 2 and preferred embodiment shown in Figure 3, wherein, the first switching tube adopts NPN type triode, and the second switch pipe adopts the IGBT pipe, and VIN is the voltage of A-battery output, and VOUT is the voltage of automobile-used voltage stable circuit output.Obtain the enabling signal S1 of engine when the base stage of triode Q2 after, the triode conducting, so that the coil of relay gets is electric, and then the contact of relay disconnects, so load is converted to by voltage conversion circuit and connects battery from connected battery by switching circuit.Detailed process is as follows: relay status is normally closed, and in the normal vehicle operation process, the power supply of instrument, broadcast receiver, navigation is directly powered by switching circuit by storage battery.This moment, the sense of current was Vin---K1----Vout, and the voltage that load obtains is battery tension; When engine moment startup, triode Q2 conducting, relay is off-state, to the power supply of instrument even load, the voltage of this moment was a stationary value after storage battery boosted by voltage conversion circuit, can guarantee fully that the instrument even load works.
In the automobile-used voltage stable circuit that the utility model provides, mainly by the break-make of control pulsewidth with change second switch pipe Q1, those skilled in the art know various pulse width modulators for transferring pulsewidth to pulse width modulator, do not repeat them here.Preferably, pulse width controller adopts pulse width modulating chip MAX15005B, and its cost is lower and performance is more stable.In the preferred embodiment that the utility model provides, pulse width modulator is electrically connected with load simultaneously, the voltage (being the voltage of voltage stable circuit output) that receives to gather load, and then the voltage of the load that can come in conjunction with feedback of pulse width modulator is exported different pulses, the magnitude of voltage of exporting to change voltage conversion circuit, and then can reduce extraneous interference.Above-mentioned battery is generally storage battery, and its cost is lower.So, in the above-described embodiments, it can be stabilized in 12V with the supply power voltage of low-voltage load, thereby power consumption equipment can be affected because of the frequent starting of engine, not only improved the user driver comfort, but also reached the purpose of energy-saving and emission-reduction and it is simple in structure, cost is lower.
What deserves to be explained is, described voltage stable circuit is mainly used in the voltage of A-battery output is offered low-voltage load, the magnitude of voltage of its output is generally fixing, in order to adapt to the power drives that different low-voltage loads may the different magnitudes of voltage of needs, the output of the voltage stable circuit that the utility model provides connects low-voltage load after can being electrically connected certain voltage conversion circuit again.It is the whole formation of above-mentioned certain voltage conversion circuit and above-mentioned low-voltage load one load.
In sum, the automobile-used voltage stable circuit that the utility model provides can be by two branch roads respectively in the situation that different from low-voltage load power supply, and then so that low-voltage load can obtain stable voltage always.So it can avoid the frequently negative effect that brings to load of start and stop of car, so that the work that the vehicle electronics device can be reliable and stable.And the automobile-used voltage stable circuit that the utility model provides is simple in structure, cost is lower.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
In description of the present utility model, unless otherwise prescribed and limit, need to prove, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly to link to each other, and also can indirectly link to each other by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. automobile-used voltage stable circuit, it is characterized in that, comprising: when engine start, the voltage of vehicle-mounted A-battery output boosted and voltage stabilizing after pass to the voltage conversion circuit of load, when being used for vehicle and being in the normal state the energy of described A-battery is passed to load switching circuit, and be used for driving the pulse width modulator of the described voltage conversion circuit work of control;
Described voltage conversion circuit is connected between A-battery and the load, and the controlled end of described voltage conversion circuit is electrically connected with described pulse width modulator;
Described switching circuit is connected between A-battery and the load, and the controlled end of described switching circuit is electrically connected with the start stop signal output of engine.
2. automobile-used voltage stable circuit as claimed in claim 1 is characterized in that, described switching circuit comprises normally closed relay K 1 and the first switching tube Q2;
The collector electrode of described the first switching tube Q2 or drain electrode connect the positive pole of described A-battery by the coil of relay K 1, its emitter or source ground, its base stage or grid connect described start stop signal output, and one group of contact of described relay K 1 connects respectively positive pole and the load of A-battery.
3. automobile-used voltage stable circuit as claimed in claim 2 is characterized in that, described the first switching tube Q2 is triode or field effect transistor.
4. automobile-used voltage stable circuit as claimed in claim 3 is characterized in that, described the first switching tube Q2 is NPN type triode.
5. automobile-used voltage stable circuit as claimed in claim 2 is characterized in that, described voltage conversion circuit comprises capacitor C 1, C2, inductance L 1, diode D1, reaches second switch pipe Q1;
Wherein, the positive pole of A-battery is by the anodic bonding of inductance L 1 with diode D1, and the negative electrode of diode D1 connects load, and capacitor C 1 is connected between the positive pole and ground of battery, and capacitor C 2 is connected between the negative electrode and ground of diode D1; Base stage or the grid of second switch pipe Q1 connect described pulse width modulator, its emitter or source ground, and its collector electrode or drain electrode connect the anode of diode D1.
6. automobile-used voltage stable circuit as claimed in claim 5 is characterized in that, described second switch pipe Q1 is field effect transistor or insulated gate bipolar transistor.
7. claim 5 or 6 described automobile-used voltage stable circuits is characterized in that, described the first switching tube Q2 is triode or field effect transistor.
8. automobile-used voltage stable circuit as claimed in claim 1 is characterized in that, described pulse width modulator is electrically connected with described load simultaneously.
9. automobile-used voltage stable circuit as claimed in claim 8 is characterized in that, described pulse width modulator is pulse width modulating chip MAX15005B.
10. automobile-used voltage stable circuit as claimed in claim 1 is characterized in that, described A-battery is storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320143835 CN203206112U (en) | 2013-03-27 | 2013-03-27 | Vehicle voltage-stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320143835 CN203206112U (en) | 2013-03-27 | 2013-03-27 | Vehicle voltage-stabilizing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203206112U true CN203206112U (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320143835 Expired - Lifetime CN203206112U (en) | 2013-03-27 | 2013-03-27 | Vehicle voltage-stabilizing circuit |
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| CN (1) | CN203206112U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405674A (en) * | 2014-12-19 | 2015-03-11 | 浙江比洛德传动技术有限公司 | Power supply device of intelligent fan control device applicable to vehicle cooling system |
| CN104802653A (en) * | 2015-03-03 | 2015-07-29 | 奇瑞汽车股份有限公司 | Voltage-stability control system |
-
2013
- 2013-03-27 CN CN 201320143835 patent/CN203206112U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405674A (en) * | 2014-12-19 | 2015-03-11 | 浙江比洛德传动技术有限公司 | Power supply device of intelligent fan control device applicable to vehicle cooling system |
| CN104802653A (en) * | 2015-03-03 | 2015-07-29 | 奇瑞汽车股份有限公司 | Voltage-stability control system |
| CN104802653B (en) * | 2015-03-03 | 2017-03-29 | 奇瑞汽车股份有限公司 | Voltage-stabilization control system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |