CN104734317B - Automobile generator output voltage control system - Google Patents
Automobile generator output voltage control system Download PDFInfo
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- CN104734317B CN104734317B CN201310702929.4A CN201310702929A CN104734317B CN 104734317 B CN104734317 B CN 104734317B CN 201310702929 A CN201310702929 A CN 201310702929A CN 104734317 B CN104734317 B CN 104734317B
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Abstract
The present invention relates to a kind of automobile generator output voltage control system.The system can provide the exciting current of linear continuous variation to generator so which kind of operating mode no matter generator be in, and can export a constant voltage, can greatly prolong the service life of vehicular electrical appliance.This kind of automobile generator output voltage control system, including generator, battery, in addition to：Sampler, the voltage for generator commutation to be exported is inputted to processor after being filtered sampling and A/D conversions；Generator speed counts device, the tach signal of self generator is carried out for receiving, and transmit the signal to processor；Driver, for exciting current to be sent to generator；Processor, the frequency range of its pulsewidth modulation exported is determined according to the output voltage values of generator and generator speed value, driver is controlled to export the size of exciting current, and source of stable pressure by way of pulsewidth modulation, respectively sampler, processor and generator speed counts device and powered.
Description
Technical field
The present invention relates to a kind of control system, the output voltage control system of more particularly to a kind of automobile current generator.
Background technology
The control mode of conventional electric generators burning voltage, makes magnet exciting coil repeatedly be operated under on off state, this
The mode of kind forms the pulsation of electromagnetic energy in generator armature, causes the fluctuation of output voltage larger, is unfavorable for electrical appliance
Normal work, the harm to battery is also larger.If when generator loses heavy load suddenly, generator output voltage can shape
Into the pulse high-voltage damage car electrical appliance of throw load.
The input and output voltage of traditional automobile current generator is generally controlled by electronic controller, and its operation principle is as schemed
Shown in 1.In the figure, the voltage output end of generator is electrically connected with electronic controller, battery and load respectively, voltage input end
Electrically connected with the voltage output end of electronic controller.The electronic controller generally comprises two triode BG1 and BG2, voltage stabilizings two
Pole pipe VS and diode D, triode BG 1 base stage meet voltage-regulator diode VS, and emitter stage connects triode BG2 base stage, triode
BG2 emitter stage is electrically connected with the magnet exciting coil RF in diode D and generator respectively.After ignition switch SW is closed, BG2 pipes
Road leads to, and exciting current (it swashs electric current) sets up D.C. magnetic field by magnet exciting coil RF in armature.Engine work, which drives, to generate electricity
While machine (now, generator excitation mode switchs to self-excitation mode), generator three-phase windings are exported by the rectification of diode group
Terminal voltage B+.When the breakdown voltage value for the pressure diode VS that B+ voltages are higher than, voltage-regulator diode VS puncture make BG1 turn on and
BG2 ends, and have turned off the loop in magnet exciting coil RF, and residual current is gradually used up to zero by diode D, and now generator is empty
Then noenergy is exported, B+ terminal voltages are continued to by battery, until when B+ terminal voltages are less than setting value V2, BG2 is led again
Lead to magnet exciting coil RF and exciting current is provided.This on-off mode can cause the larger arteries and veins of electromagnetic energy in generator armature
It is dynamic, cause output voltage B+ fluctuation, cause generator output voltage to fluctuate ± 5%~7% or so.To current auto electric system
The job stability for the embedded controller that system is largely used especially has potential threat.
The working environment of automobile current generator be it is complicated, its power be taken from the rotating speed moment change engine, and it
Load change be also it is random, while electromagnetic energy conversion again be with retardance.Therefore in current automotive electronics
It is simple just to seem awkward using conventional electric generators electronic pressure regulating formula for electrical system.Especially to current auto electric system
The job stability and reliability for the embedded controller that system is largely used are respectively provided with potential threat.In order to adapt to current automobile
Electronic technology is developed by leaps and bounds, for automobile intelligent control system safe and reliable work, and the skill upgrading head of electric power system works as
It is rushed.
The content of the invention
For deficiency of the prior art, the present invention is intended to provide a kind of output voltage control system of automobile generator
System, the system can provide the exciting current of linear continuous variation to generator so which kind of operating mode no matter generator be in, all
A constant voltage can be exported, the service life of vehicular electrical appliance can be greatly prolonged.
In order to solve the above problems, this kind of automobile generator output voltage control system, including generator, battery, also
Including：Sampler, it is electrically connected with the voltage output end of generator, and the voltage for generator commutation to be exported, which is filtered, to be adopted
Inputted after sample and A/D conversions to processor；
Generator speed counts device, the tach signal of self generator is carried out for receiving, and transmit the signal to processor；
Driver, it is electrically connected with magnet exciting coil in generator, for exciting current to be sent to generator；
Processor, its signal input part counts device with sampler and generator speed respectively and electrically connect, signal output part and
Driver is electrically connected, and processor determines its pulsewidth modulation exported according to the output voltage values and generator speed value of generator
Frequency range, controls driver to export the size of exciting current by way of pulsewidth modulation, and
Source of stable pressure, respectively sampler, processor and generator speed count device and powered.
Preferably, between the voltage output end of the sampler and generator and it is connected to transient voltage suppressor diode.
Preferably, the signal input part of the processor is also electrically connected with vehicle body CAN, for receiving vehicle condition signal,
The processor determines the frequency of its pulsewidth modulation exported according to vehicle condition signal, the output voltage values of generator and generator speed value
It is wide.
Preferably, the vehicle condition signal includes：Temperature signal and load change signal.
Preferably, between the input of the driver and generator and it is connected to filter capacitor.
Preferably, provided with a delay time value Δ t in the processor；It is described before big load electrical appliance is closed
Processor control driver reduces exciting current output valve, after delay time value Δ t, then discharges the big load electrical appliance
Driving.
It is highly preferred that the delay time value is according to formula：Δ t=k*L/R determines that wherein R is the resistance of Exciting Windings for Transverse Differential Protection
Value, L are the inductance value of Exciting Windings for Transverse Differential Protection, and k is correction factor.Correction factor k values are between 1.1~1.4.
The automobile linear stable-voltage generator of the present invention continuously adjusts exciting current using negative-feedback, rather than switch-mode regulation is steady
Operation principle is pressed, and in the application of auto electric field and other field of electrical control；
For the generation of effectively containment generator output end throw load, set especially inside the automobile current generator of linear voltage stabilization
TVS, reduces cause TVS off-load detrimental effects by line resistance to greatest extent；
Linear voltage stabilization generator makes the shock resistance of whole electricity system electrical equipment be down to 5b ranks from traditional 5a ranks,
Reduce whole vehicle electric element design cost；
The embedded controller A3 introduced in linear voltage stabilization automobile current generator, can share vehicle operating mode by bus and believe
Breath, and effective intelligent control is carried out to it；
The purpose weighed with system level is exported for burning voltage, takes delays time to control when being turned off to large current load to patrol
Volume.
The system can be with the voltage output of steady and continuous so that the reliability of automotive electrical system is improved, and in hair
Motor internal sets packet routing device TVS, comprehensive delays time to control, can effectively suppression system throw load generation.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the output voltage control system of automobile current generator of the prior art；
Fig. 2 for the present invention in automobile current generator output voltage control system circuit block diagram；
Fig. 3 is the output voltage and the output voltage ripple compares figure of conventional electric generators of the generator using the present invention；
Fig. 4 is the present invention is using large current load time delayed turn-off generator and does not use the output of time delayed turn-off generator electric
Corrugating compares figure.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings.
As shown in Fig. 2 the automobile generator output voltage control system of the present invention, it is adaptable to automobile 12/24V systems, together
Sample is applied to other automobile power systems, and the system eliminates traditional electronic controller, changes conditional electronic pressure regulator
Control mode is switched, the mode of LINEAR CONTINUOUS regulation is employed.The system includes generator and battery.Also include a sampling
Device A1, it is electrically connected with the voltage output end of generator, the voltage B2 for generator commutation to be exported be filtered sampling and
Inputted after A/D conversions to processor A3, a generator speed counts device A4, the tach signal of self generator is carried out for receiving,
And processor A3, a driver A5 are transmitted the signal to, it is electrically connected with the magnet exciting coil RF in generator, for that will encourage
Magnetoelectricity stream is sent to generator, a processor A3, and its signal input part counts device with sampler A1 and generator speed respectively
A4 is electrically connected, and signal output part is electrically connected with driver A5.Processor is according to the output voltage values and generator speed of generator
Value changes the frequency range of the pulsewidth modulation (PWM, Pulse Width Modulation) of output, is controlled by way of pulsewidth modulation
Driver A5 output exciting current change, driver sends exciting current the magnet exciting coil RF into generator.For example, such as
The output voltage values that fruit detects generator are less than rated value, or generator speed value is less than rated output voltage requirements
When, processor needs to adjust pulse width modulation values, and to increase the exciting current of driver output, vice versa.By to excitation wire
The exciting current that RF provides linear continuous variation is enclosed, makes no matter generator is in any operating mode, such as engine speed changes, born
Change, temperature change etc. are carried, a constant voltage is exported all the time.Its generator output voltage is fluctuated all the time≤± 0.6%.
The voltage environment of this stabilization can greatly prolong electrical appliance, include the service life of battery.A2 is 5V source of stable pressure, is respectively
Processor A3, generator speed count device A4 and sampler A1 work power supplies.Between driver A5 and the input of generator
Also and it is connected to filter capacitor C.Driver A5 is promoted by processor A3 PWM delivery outlets, after filter capacitor C smoothing processings,
The exciting current of linear continuous variation can be provided to magnet exciting coil RF.
In addition, between sampler A1 and the voltage output end of generator and being connected to transient voltage suppressor diode TVS
(Transient Voltage Suppressor), voltage suppression diode TVS is the transient state of suitable voltage-regulator diode characteristic
Voltage suppressor device.To LINEAR CONTINUOUS tuner during for defending throw load to occur, so the entirely injury of electrical system.It has
There are ns grades of response speed, tolerance pulse power 400W~30KW, pulse peak current 0.52A~544A；Breakdown voltage 6.8V
~550V, entirely appropriate automobile 12/24V electric power systems contain the requirement of throw load.It can make the resistance to punching of whole vehicle electric element
Performance is hit from 5a design of Reducing Rating to 5b, integral vehicle cost is reduced.
Furthermore, just because of the complexity of the working environment of automobile current generator, in order to the operating mode for improving generator is adaptive should be able to
Power, more stable working environment is provided for electric system, further extends the service life of electrical appliance (including battery),
And contain impact of the throw load to system, CAN interface is also provided with processor A3, to improve generator and vehicle dynamic
Matching.The CAN interface of the processor is electrically connected with vehicle body CAN, for receiving vehicle condition signal.The vehicle condition signal can
Think：Temperature signal and load change signal etc. influence the information of electric equilibrium.
In actual applications, when ignition switch SW is closed, start driver A5 and exported with the exciting current of a setting, led to
Overexcitation coil RF sets up D.C. magnetic field in generator armature.While engine work drives generator rotation, generate electricity
Machine three-phase windings pass through diode group rectification output end voltage B1.B2 generators behind sampler A1 collection ignition switches SW are defeated
Go out DC voltage, through being inputted inside oversampler A1 after filtering, A/D conversion to processor A3, while engine tachometer
Number device A4, which is received, comes from generator speed signal W, and the value through counting also inputs to processor A3.As needed, A3 can also connect
Other signals from bus are received, according to vehicle working condition, exciting current value are synthetically calculated, are exported by processor A3 PWM
Mouth promotes driver A5, after filtered electric capacity C is smooth, and the exciting current of linear continuous variation is provided to magnet exciting coil RF.
Fig. 3 is two kinds of generator machine output voltage ripple compares figures, and u (t) is the output voltage of generator, curve u1 (t)
It is the output voltage ripple of conditional electronic pressure-adjusting type generator；Curve u2 (t) is the output voltage line of the generator in this patent
Ripple, it can be seen that curve u2 (t) ripple is gentler, close to the desired output magnitude of voltage B+ of generator.It is exported
Difference of the difference of upper voltage limit and lower voltage limit much smaller than the output voltage limit V1 and output voltage lower limit V2 of conventional electric generators.
Fig. 4 is using large current load time delayed turn-off generator and does not use time delayed turn-off generator output voltage waveform pair
According to figure.T1 is Operation switch action moment in figure, and t2 is that large current load disconnects the moment, and Δ t is exciting current adjustment time.Figure
Middle a is the output waveform of generator when not taking delay measure, and b is the output waveform for taking delay measure generator.For example, electric
When gas system is intended to close the electrical appliance of some big load, operation switching signal t1 is informed into controller A3, A3 by bus in advance
Start control driver and reduce exciting current in advance, after Δ t delay, the drive of the electrical appliance of big load is discharged at the t2 moment
It is dynamic, to avoid the electric equilibrium of system moment unbalance.Δ t is according to formula：Δ t=k*L/R determines that wherein R is Exciting Windings for Transverse Differential Protection
Resistance value, L are the inductance value of Exciting Windings for Transverse Differential Protection, and k is correction factor, and the k values are between 1.1~1.4.
It should be noted that embodiment is only the explanation and illustration to technical solution of the present invention, should not be by it
It is interpreted as the restriction to technical solution of the present invention, any use technical scheme and only makees local change, Reng Yingluo
Enter in protection scope of the present invention.
Claims (7)
1. a kind of automobile generator output voltage control system, including generator, battery, in addition to：
Sampler (A1), it is electrically connected with the voltage output end of generator, and the voltage for generator commutation to be exported is filtered
Ripple is sampled to be inputted to processor with after A/D conversions；
Generator speed counts device (A4), the tach signal of self generator is carried out for receiving, and transmit the signal to processor；
Driver (A5), it is electrically connected with magnet exciting coil in generator, for exciting current to be sent to generator；
Processor (A3), its signal input part counts device (A4) with sampler (A1) and generator speed respectively and electrically connected, signal
Output end is electrically connected with driver (A5), and processor (A3) determines it according to the output voltage values and generator speed value of generator
The frequency range of the pulsewidth modulation of output, controls driver (A5) to export the size of exciting current by way of pulsewidth modulation；And
Source of stable pressure (A2), respectively sampler (A1), processor (A3) and generator speed count device (A4) power supply, and its feature exists
In：
One delay time value Δ t is set by the processor (A3)；Before big load electrical appliance is closed, the processor
(A3) control driver (A5) reduces exciting current output valve, after delay time value Δ t, then discharges the big load electricity consumption
The driving of device.
2. automobile generator output voltage control system according to claim 1, it is characterised in that：The sampler (A1)
Between the voltage output end of generator and it is connected to transient voltage suppressor diode (TVS).
3. automobile generator output voltage control system according to claim 1, it is characterised in that：The processor (A3)
Signal input part also electrically connected with vehicle body CAN, for receiving vehicle condition signal, the processor according to vehicle condition signal, generate electricity
The output voltage values and generator speed value of machine determine the frequency range of the pulsewidth modulation of its output.
4. automobile generator output voltage control system according to claim 3, it is characterised in that：The vehicle condition signal bag
Include：Temperature signal and load change signal.
5. automobile generator output voltage control system according to claim 1, it is characterised in that：The driver (A5)
Between the input of generator and it is connected to filter capacitor (C).
6. automobile generator output voltage control system according to claim 1, it is characterised in that：The delay time value
According to formula：Δ t=k*L/R determines that wherein R is the resistance value of Exciting Windings for Transverse Differential Protection, and L is the inductance value of Exciting Windings for Transverse Differential Protection, and k is for amendment
Number.
7. automobile generator output voltage control system according to claim 6, it is characterised in that：The correction factor k
Value is between 1.1~1.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310702929.4A CN104734317B (en) | 2013-12-19 | 2013-12-19 | Automobile generator output voltage control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310702929.4A CN104734317B (en) | 2013-12-19 | 2013-12-19 | Automobile generator output voltage control system |
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| CN104734317A CN104734317A (en) | 2015-06-24 |
| CN104734317B true CN104734317B (en) | 2017-09-26 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034710B (en) * | 2019-05-24 | 2023-08-22 | 重庆交通职业学院 | Self-adjusting excitation power generation system of automobile |
| CN112152526B (en) * | 2020-09-27 | 2022-11-29 | 浙江德宏汽车电子电器股份有限公司 | Pre-excitation current rotating speed response energy-saving control method for intelligent automobile generator |
Citations (4)
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| DE102010029299A1 (en) * | 2010-05-26 | 2011-12-01 | Robert Bosch Gmbh | Method for operating a system, system, controller and computer program product |
| CN102386829A (en) * | 2011-08-24 | 2012-03-21 | 南京航空航天大学 | Starting power generation system for electric automobile |
| CN102843049A (en) * | 2011-06-20 | 2012-12-26 | 昆山巩诚电器有限公司 | Rectifier voltage regulator for motorcycles |
| CN103359025A (en) * | 2012-04-10 | 2013-10-23 | 陕西重型汽车有限公司 | Automobile power management control device and automobile including same |
-
2013
- 2013-12-19 CN CN201310702929.4A patent/CN104734317B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010029299A1 (en) * | 2010-05-26 | 2011-12-01 | Robert Bosch Gmbh | Method for operating a system, system, controller and computer program product |
| CN102843049A (en) * | 2011-06-20 | 2012-12-26 | 昆山巩诚电器有限公司 | Rectifier voltage regulator for motorcycles |
| CN102386829A (en) * | 2011-08-24 | 2012-03-21 | 南京航空航天大学 | Starting power generation system for electric automobile |
| CN103359025A (en) * | 2012-04-10 | 2013-10-23 | 陕西重型汽车有限公司 | Automobile power management control device and automobile including same |
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