CN106787653A - A kind of drive control method and power circuit - Google Patents
A kind of drive control method and power circuit Download PDFInfo
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- CN106787653A CN106787653A CN201710211045.7A CN201710211045A CN106787653A CN 106787653 A CN106787653 A CN 106787653A CN 201710211045 A CN201710211045 A CN 201710211045A CN 106787653 A CN106787653 A CN 106787653A
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- power circuit
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
Abstract
The embodiment of the invention discloses a kind of drive control method and power circuit.Wherein, the method includes:When power circuit meets default alternately hair ripple condition, start the first driving of the first controlled resonant converter, and close the second driving of the second controlled resonant converter;Detect whether the described first startup time for driving reached preset time threshold;If reaching the preset time threshold, close described first and drive, and open described second and drive.Using the embodiment of the present invention, the service life of battery can be extended.
Description
Technical field
The application is related to automatic control technology field, more particularly to a kind of drive control method and power circuit.
Background technology
At present, power circuit generally existing output power, power density problem high, thus, in order to lift power supply electricity
The charge efficiency and radiating effect on road, most of highdensity power circuit of high power employ PFC (English:
Power Factor Correction, abbreviation:PFC)+two-way LLC topologys are received.Electricity is often caused using two-way LLC topologys
Pressure or electric current are higher, and now power circuit can enter into burst (hiccup) pattern, to realize exporting lower voltage or electric current.
However, the hair ripple mechanism of current two-way LLC topology main flows is that synchronously hair drives two-way LLC for positive and negative busbar LLC,
This just causes output voltage ripple and current ripples to be significantly increased, and causes the loss to battery larger, thus reduces the battery longevity
Life.As shown in Figure 1a, when the LLC resonant converter 1 in two-way LLC topologys sends driving, LLC resonant converter 2 is synchronous
Send driving;When LLC resonant converter 1 is closed to be driven, synchronous the closing of LLC resonant converter 2 drives.So that two-way LLC is same
While power output, power output is larger when causing to export low pressure underloading, rushes more on voltage, electric current in time;Simultaneously close off
After driving, fall very big under voltage x current, cause that the ripple peak-to-peak value under burst patterns is larger, the loss to battery is larger.This
Outward, in order to solve the problems, such as LLC underloading ripples, the LLC hair ripple mechanism also having at present is to drive two-way LLC to stagger 90 °, due to
The secondary current of LLC is half-wave sinusoidal waveform, and staggeredly crest is superimposed with zero point after 90 ° so that output ripple is smoothed.Its essence is still
So power output simultaneously, simply at the same time power output when be finely adjusted, output energy and above-mentioned synchronous hair drive and pass
The mode for closing driving has no essential distinction, therefore the ripple peak-to-peak value that still cannot be solved under burst patterns is larger, to battery
The larger problem of loss.
The content of the invention
A kind of drive control method and power circuit are the embodiment of the invention provides, helps to solve under burst patterns
The larger problem of ripple peak-to-peak value, such that it is able to extend the service life of battery.
In a first aspect, the embodiment of the invention provides a kind of drive control method, it is applied in power circuit, power supply electricity
Road may include the first controlled resonant converter and the second controlled resonant converter, including:
When the power circuit meets default alternately hair ripple condition, start the first driving of first controlled resonant converter,
And close the second driving of second controlled resonant converter;
Detect whether the first startup time for driving reaches preset time threshold;
If reaching the preset time threshold, first driving is closed, and open second driving.
Optionally, the drive control method of the application can be by computing device, it is also possible to by other processing equipments
Perform, the processor or processing equipment can be connected with first controlled resonant converter and the second controlled resonant converter respectively.
In some possible realizations, the output parameter of the power circuit can be also obtained;By the output parameter with it is default
First parameter threshold is compared, and when comparative result meets default comparison rule, determines that the power circuit meets default
Alternating hair ripple condition.Wherein, the parameter type of first parameter threshold can be identical with the parameter type of the output parameter.
In some possible realizations, the output parameter can include output voltage, and first parameter threshold includes voltage
Threshold value;With default first parameter threshold be compared the output parameter by this, and meet in comparative result and default compare rule
When then, determine that the power circuit meets default alternately hair ripple condition, can be specially:Judge the output voltage of the power circuit
Whether default voltage threshold is less than;If being less than the voltage threshold, it is determined that the power circuit meets default alternately hair ripple bar
Part.Output voltage so as to be based on power circuit determines whether the power circuit meets alternately hair ripple condition.
In some possible realizations, the output parameter may include output current, and first parameter threshold includes current threshold
Value;With default first parameter threshold be compared the output parameter by this, and meets default comparison rule in comparative result
When, determining that the power circuit meets default alternately hair ripple condition, can be specially:Judging the output current of the power circuit is
It is no less than default current threshold;If being less than the current threshold, it is determined that the power circuit meets default alternately hair ripple condition.
Output current so as to be based on power circuit determines whether the power circuit meets alternately hair ripple condition.
In some possible realizations, the power circuit may also include loop control unit, and the output parameter can include defeated
Go out power, first parameter threshold may include power threshold;The output parameter of the acquisition power circuit, can be specially:Obtain
The output voltage and output current of the power circuit are taken, and the loop control unit is determined based on the output voltage and output current
Power output;With default first parameter threshold be compared the output parameter by this, and meets default ratio in comparative result
When relatively regular, determine that the power circuit meets default alternately hair ripple condition, can be specially:Judge whether the power output is low
In default power threshold;If being less than the power threshold, it is determined that the power circuit meets default alternately hair ripple condition.So as to
The power output that power circuit can be based on determines whether the power circuit meets alternately hair ripple condition.
In some possible realizations, the first startup time for driving can be with second startup for driving every time every time
Time is identical.That is, first controlled resonant converter and the second controlled resonant converter are when alternately hair ripple is carried out, first resonance
Each hair period of wave of converter and each time for sending out period of wave of the second controlled resonant converter can be identicals.
In some possible realizations, the preset time threshold can be the size of the output parameter according to the power circuit
Determine;Wherein, the output parameter includes at least one in output voltage, output current and power output.Namely
Say, the preset time threshold can change according to the size of the output parameter of the power circuit, so that alternately hair ripple machine
When the hair ripple that controlled resonant converter is carried out in system switches, the less output ripple of choppy is more smooth.
In some possible realizations, when the output parameter of the power circuit exceedes default second parameter threshold, also
First driving and second driving can simultaneously be started;Wherein, the parameter type of second parameter threshold and the output parameter
Parameter type is identical.Further alternative, the parameter type of second parameter threshold can be with the parameter class of the first parameter threshold
Type is identical, and second parameter threshold can be more than first parameter threshold.To prevent from sending out the frequent switching of ripple mechanism.
Second aspect, the embodiment of the present invention additionally provides a kind of power circuit, and the power circuit includes processor, first humorous
Shake converter and the second controlled resonant converter;
The processor, for when the power circuit meets default alternately hair ripple condition, starting first resonant transformation
First driving of device, and close the second driving of second controlled resonant converter;
The processor, is additionally operable to detect whether the first startup time for driving reaches preset time threshold, and reaching
During the preset time threshold, first driving is closed, and open second driving.
In some possible realizations, the processor, it may also be used for obtain the output parameter of the power circuit, this is exported
Parameter is compared with default first parameter threshold, and when comparative result meets default comparison rule, determines the power supply
Circuit meets default alternately hair ripple condition.Wherein, the parameter class of the parameter type of first parameter threshold and the output parameter
Type is identical.
In some possible realizations, the output parameter may include output voltage, and first parameter threshold includes voltage threshold
Value;In execution, with default first parameter threshold be compared the output parameter processor by this, and meets in comparative result
During default comparison rule, when determining that the power circuit meets default alternately hair ripple condition, can be specifically for:Judge the power supply
Whether the output voltage of circuit is less than default voltage threshold;If being less than the voltage threshold, it is determined that the power circuit meets pre-
If alternating hair ripple condition.
In some possible realizations, the output parameter may include output current, and first parameter threshold includes current threshold
Value;In execution, with default first parameter threshold be compared the output parameter processor by this, and meets in comparative result
During default comparison rule, when determining that the power circuit meets default alternately hair ripple condition, can be specifically for:Judge the power supply
Whether the output current of circuit is less than default current threshold;If being less than the current threshold, it is determined that the power circuit meets pre-
If alternating hair ripple condition.
In some possible realizations, the power circuit may also include loop control unit, and the output parameter includes output work
Rate, first parameter threshold includes power threshold;During the output parameter of the computing device acquisition power circuit, can be specific
For:The output voltage and output current of the power circuit are obtained, and the loop is determined based on the output voltage and output current
The power output of controller.Further, in execution, this enters the output parameter with default first parameter threshold to the processor
Row compares, and when comparative result meets default comparison rule, determines that the power circuit meets default alternately hair ripple condition
When, can be specifically for:Judge the power output whether less than default power threshold;If being less than the power threshold, it is determined that should
Power circuit meets default alternately hair ripple condition.
In some possible realizations, the first startup time for driving and the every time second startup time for driving every time
It is identical.
In some possible realizations, the preset time threshold is that the size of the output parameter according to the power circuit determines
Go out.Wherein, the output parameter includes at least one in output voltage, output current and power output.
In some possible realizations, the processor, it may also be used for when the output parameter of the power circuit is more than default
During the second parameter threshold, while starting first driving and second driving.Wherein, the parameter type of second parameter threshold with
The parameter type of the output parameter is identical.
In some possible realizations, the parameter type of the parameter type of second parameter threshold and first parameter threshold
It is identical, and second parameter threshold can be more than first parameter threshold.
Using the embodiment of the present invention, have the advantages that:
This application claims technical scheme in, can be by detecting that the output parameter of power circuit determines the power supply
Whether circuit meets default alternately hair ripple condition, and when alternating hair ripple condition is met, carries out a LLC and the 2nd LLC
Alternating hair ripple, so as to reduce voltage ripple peak-to-peak value and current ripples peak of the positive and negative busbar LLC circuits in low pressure underloading
Peak value, and during due to low pressure underloading the same time only have LLC work all the way, now dash forward when cutting heavy duty, current over pulse can be suppressed,
So that the service life of extension battery.Additionally, by two-way LLC circuit alternations, its working frequency works than two-way simultaneously
When it is low such that it is able to improve voltage stress and thermal stress.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention or in background technology, will implement to the present invention below
Example or the accompanying drawing to be used needed for background technology are illustrated.
Fig. 1 a are a kind of waveform diagrams of the hair ripple mechanism of two-way LLC of the prior art;
Fig. 1 b are the waveform diagrams of the hair ripple mechanism of another two-way LLC of the prior art;
Fig. 2 is a kind of structural representation of power circuit provided in an embodiment of the present invention;
Fig. 3 a are a kind of power circuit topology structural representations based on series connection LLC provided in an embodiment of the present invention;
Fig. 3 b are a kind of power circuit topology structural representations based on LLC in parallel provided in an embodiment of the present invention;
Fig. 4 is a kind of waveform diagram of the hair ripple mechanism of two-way LLC provided in an embodiment of the present invention;
Fig. 5 is the structural representation of another power circuit provided in an embodiment of the present invention;
Fig. 6 is the structural representation of another power circuit provided in an embodiment of the present invention;
Fig. 7 is a kind of schematic flow sheet of drive control method provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described with reference to the accompanying drawing in the embodiment of the present invention.
The embodiment of the invention discloses a kind of drive control method and power circuit, help to solve under burst patterns
The larger problem of ripple peak-to-peak value, such that it is able to extend the service life of battery.It is described in detail individually below.
Fig. 2 is referred to, Fig. 2 is a kind of structural representation of power circuit provided in an embodiment of the present invention.As shown in Fig. 2
The power circuit includes processor, the first controlled resonant converter and the second controlled resonant converter.Wherein,
The processor, can be used to, when power circuit meets default alternately hair ripple condition, start the first controlled resonant converter
First driving, and close the second controlled resonant converter second driving;
The processor, it may also be used for detect whether the first startup time for driving reaches preset time threshold, and
When reaching preset time threshold, first driving is closed, and open second driving.
Further alternative, the processor can also be used to detect whether the second startup time for driving reaches Preset Time
Threshold value, and when preset time threshold is reached, second driving is closed, and open first driving.In alternately hair wave process,
The processor can repeat above-mentioned first controlled resonant converter (i.e. a LLC) and the second controlled resonant converter (i.e. the 2nd LLC)
The process of ripple is alternately sent out, such as realizes that first controlled resonant converter and the second controlled resonant converter periodically alternately send out ripple.
Optionally, first controlled resonant converter and the second controlled resonant converter can be the companies that is connected in parallel, or connects
Connect.As shown in Figure 3 a, it is a kind of power circuit topology structural representation based on series connection LLC provided in an embodiment of the present invention.
As shown in Figure 3 b, it is a kind of power circuit topology structural representation based on LLC in parallel provided in an embodiment of the present invention.
Specifically, power circuit is when default alternately hair ripple condition is met, you can the first controlled resonant converter of control (i.e. the
One LLC) and the second controlled resonant converter (i.e. the 2nd LLC) alternating hair ripple.That is, in the driving for starting the first controlled resonant converter (i.e.
The first controlled resonant converter is controlled to send out ripple) when, the driving for closing (or shielding) second controlled resonant converter (controls the second resonant transformation
Device does not send out ripple);Accordingly, when driving (the controlling the second controlled resonant converter to send out ripple) of the second controlled resonant converter is started, close
The driving (controlling the first controlled resonant converter not send out ripple) of the first controlled resonant converter, so that control two-way LLC alternately hair ripples are realized,
As shown in Figure 4.
Further, the processor, it may also be used for obtain the output parameter of the power circuit, by the output parameter with it is pre-
If the first parameter threshold be compared, and when comparative result meets default comparison rule, determine that the power circuit meets
Default alternately hair ripple condition.Optionally, the output parameter can include but is not limited to output voltage, output current, output work
Rate etc., the parameter type of first parameter threshold can be identical with the parameter type of the output parameter of the power circuit.Also
It is to say, when the output parameter is output voltage, first parameter threshold can be voltage threshold;The output parameter is output current
When, first parameter threshold can be current threshold;When the output parameter is power output, first parameter threshold can be work(
Rate threshold value, etc., does not enumerate herein.
Further alternative, the output parameter can include output voltage, and first parameter threshold includes voltage threshold;Then
Processor perform it is described the output parameter is compared with default first parameter threshold, and meet pre- in comparative result
If comparison rule when, when determining that the power circuit meets default alternately hair ripple condition, can be specifically for:Judge described
Whether the output voltage of power circuit is less than default voltage threshold;If being less than the voltage threshold, it is determined that the power supply electricity
Road meets default alternately hair ripple condition.Optionally, the processor that the application is related to can be digital signal processor (English:
Digital Signal Processor, abbreviation:DSP), or can be other processors, the embodiment of the present invention do not limit.
Specifically, a voltage threshold can be pre-set.As shown in figure 5, processor can detect the defeated of power circuit
Go out voltage, such as being sampled by output voltage sampling circuit obtains the output voltage.When the output voltage for detecting the power circuit
(during as determined that two-way LLC sends out ripple simultaneously, voltage ripple peak-to-peak value is larger, it is impossible to meet output voltage values during standard requirement) is low
Can determine that the power circuit meets alternately hair ripple condition when the voltage threshold, so that controllable first controlled resonant converter of processor
Ripple is alternately sent out with the second controlled resonant converter.Optionally, the detection operation of the magnitude of voltage can detect power circuit entrance
Trigger what is performed after Burst patterns, such as, into after Burst patterns, first controlled resonant converter and second in power circuit
Controlled resonant converter first can synchronously send out driving and close and drive, and carry out voltage detecting, when the output voltage for detecting power circuit
During less than the voltage threshold, first controlled resonant converter and the second controlled resonant converter can carry out alternately hair ripple;Or, the voltage
The detection operation of value can also be carried out in real time, and the embodiment of the present invention is not limited.
In this application, Burst patterns namely hiccup pattern, it can refer to start a period of time driving, close one section
The control model that time drives, to carry out voltage and/or current control, realizes output relatively low voltage and/or electric current.
Further alternative, the output parameter may include output current, and first parameter threshold includes current threshold;Then locate
Reason device perform it is described the output parameter is compared with default first parameter threshold, and meet default in comparative result
Comparison rule when, when determining that the power circuit meets default alternately hair ripple condition, can be specifically for:Judge the power supply
Whether the output current of circuit is less than default current threshold;If being less than the current threshold, it is determined that the power circuit is expired
The default alternately hair ripple condition of foot.
Specifically, a current threshold can be pre-set.As shown in figure 5, processor can detect the defeated of power circuit
Go out electric current, such as obtain the output current by output current sampling circuit samples.When the output current for detecting the power circuit
(during as determined that two-way LLC sends out ripple simultaneously, current ripples peak-to-peak value is larger, it is impossible to meet output current value during standard requirement) is low
Can determine that the power circuit meets alternately hair ripple condition when the current threshold, so that controllable first controlled resonant converter of processor
Ripple is alternately sent out with the second controlled resonant converter.Optionally, the detection operation of the output current can be entered detecting power circuit
Enter and trigger after Burst patterns what is performed, such as, into after Burst patterns, first controlled resonant converter and the in power circuit
Two controlled resonant converters first can synchronously send out driving and close and drive, and carry out current detecting, when the output electricity for detecting power circuit
When stream is less than the current threshold, first controlled resonant converter and the second controlled resonant converter can carry out alternately hair ripple;Or, this is defeated
The detection operation for going out electric current can also be carried out in real time, and the embodiment of the present invention is not limited.
Further alternative, the power circuit may also include loop control unit, and the output parameter can include power output,
First parameter threshold may include power threshold;Then processor perform it is described obtain the power circuit output parameter when,
Can be specifically for:The output voltage and output current of the power circuit are obtained, and based on the output voltage and output current
Determine the power output of the loop control unit.Further, the processor perform it is described by the output parameter with it is default
The first parameter threshold be compared, and when comparative result meets default comparison rule, determine that the power circuit meets
During default alternately hair ripple condition, can be specifically for:Judge the power output whether less than default power threshold;If being less than
The power threshold, it is determined that the power circuit meets default alternately hair ripple condition.
Specifically, a power threshold can be pre-set.As shown in fig. 6, loop control unit can be by obtaining power supply electricity
The output voltage (output voltage can be sampled by output voltage sampling circuit and be obtained) and output current (output current on road
Can be obtained by output current sampling circuit samples) power output is calculated, and the work(can be less than in the power output
Determine that the power circuit meets alternately hair ripple condition during rate threshold value, so that controllable first controlled resonant converter of processor and second humorous
The converter that shakes alternately sends out ripple.Optionally, the detection operation of the power output can detect power circuit into Burst moulds
Trigger what is performed after formula, such as, into after Burst patterns, first controlled resonant converter and the second resonance become in power circuit
Parallel operation first can synchronously send out driving and close and drive, and carry out power detection, be somebody's turn to do when the power output for detecting power circuit is less than
During power threshold, first controlled resonant converter and the second controlled resonant converter can carry out alternately hair ripple;Or, the power output
Detection operation can also be carried out in real time, and the embodiment of the present invention is not limited.
Optionally, the first startup time for driving is identical with the second startup time for driving every time every time.Namely
Say, when alternately hair ripple is carried out, each of first controlled resonant converter is sent out for first controlled resonant converter and the second controlled resonant converter
The time that each of period of wave and the second controlled resonant converter send out period of wave can be identical.
Further alternative, the preset time threshold can be that the size of the output parameter according to power circuit is determined
's.Wherein, the output parameter can be including at least one in output voltage, output current and power output.For example, this is defeated
The value such as output voltage for going out parameter is smaller, and the preset time threshold can be bigger;The value of the output parameter is bigger, the Preset Time
Threshold value can be with smaller.So that when the hair ripple that controlled resonant converter is alternately carried out in hair ripple mechanism switches, choppy is less defeated
Go out ripple more smooth.
Optionally, the processor, it may also be used for when the output parameter of power circuit exceedes default second parameter threshold
When, while start first driving and second driving.Wherein, the parameter type of second parameter threshold can be with the output parameter
Parameter type it is identical.Further alternative, the parameter type of second parameter threshold can be with the parameter of the first parameter threshold
Type is identical, and second parameter threshold can be more than first parameter threshold.
That is, second parameter threshold can be pre-set, second parameter threshold can be with first parameter
Threshold value is different, such as be slightly above first parameter threshold so that should leave return difference between the two, critical in Rule of judgment to prevent
Point frequent switching hair ripple mechanism.So as to processor can exceed the second parameter threshold time control in the value of the output parameter of power circuit
Make first controlled resonant converter and the second controlled resonant converter exits this and staggeredly sends out ripple mechanism.Further, exit this and staggeredly send out ripple
Can remain at Burst patterns after mechanism, such as the first controlled resonant converter and the second controlled resonant converter can be using synchronous
Hair drives or closes the hair ripple mechanism for driving;Or the Burst patterns can be directly exited, the embodiment of the present invention is not limited.
In embodiments of the present invention, can be by detecting whether the value of the output parameter of power circuit determines the power circuit
Meet default alternately hair ripple condition, and when alternating hair ripple condition is met, carry out the alternating hair of a LLC and the 2nd LLC
Ripple, so as to reduce voltage ripple peak-to-peak value and current ripples peak-to-peak value of the positive and negative busbar LLC circuits in low pressure underloading, and by
The same time only has LLC work all the way when low pressure underloading, now dashes forward when cutting heavy duty, can suppress current over pulse so that extension
The service life of battery.Additionally, by two-way LLC circuit alternations, its working frequency is low when being worked than two-way simultaneously, from
And voltage stress and thermal stress can be improved.
Fig. 7 is referred to, Fig. 7 is a kind of schematic flow sheet of drive control method provided in an embodiment of the present invention.Specifically,
The drive control method can be applied in power circuit, and the power circuit may include the first controlled resonant converter and the second resonant transformation
Device.As shown in fig. 7, the method may include but be not limited to following steps:
101st, when power circuit meets default alternately hair ripple condition, the first driving of the first controlled resonant converter is started,
And close the second driving of the second controlled resonant converter.
Optionally, the methods described of the embodiment of the present invention can be by computing device, it is also possible to by other processing equipments
Perform, the processor can be connected with first controlled resonant converter and the second controlled resonant converter respectively.
Optionally, the processor can be by obtaining the output parameter of power circuit;By the output parameter and default first
Parameter threshold is compared, and when comparative result meets default comparison rule, determines that the power circuit meets default friendship
For hair ripple condition.Wherein, the output parameter can be output voltage and/or output current and/or power output etc., and this first
The parameter type of parameter threshold can be identical with the parameter type of the output parameter.
102nd, detect whether the first startup time for driving reaches preset time threshold.
If the 103, reaching the preset time threshold, close first and drive, and open second and drive.
In an alternate embodiment of the invention, the output parameter can include output voltage, and first parameter threshold includes voltage threshold
Value;It is described that the output parameter is compared with default first parameter threshold, and meet default comparing in comparative result
When regular, determine that the power circuit meets default alternately hair ripple condition, can be specially:Judge the defeated of the power circuit
Whether go out voltage less than default voltage threshold;If being less than the voltage threshold, it is determined that the power circuit meets default
Alternately send out ripple condition.
Specifically, a voltage threshold can be pre-set, such that it is able to detect the output voltage of power circuit, such as pass through
Output voltage sampling circuit sampling obtains the output voltage, and is less than the voltage threshold in the output voltage for detecting the power circuit
Determine that the power circuit meets alternately hair ripple condition during value, so as to control the first controlled resonant converter and the second controlled resonant converter to replace
Hair ripple.Optionally, the detection operation of the output voltage can detect power circuit into triggering execution after Burst patterns
, such as, into after Burst patterns, first controlled resonant converter and the second controlled resonant converter can be first same in power circuit
Step hair drives and closes and drives, and carries out voltage detecting, when the output voltage for detecting power circuit is less than the voltage threshold, can
To control first controlled resonant converter and the second controlled resonant converter to carry out alternately hair ripple;Or, the detection operation of the output voltage
Can also carry out in real time, the embodiment of the present invention is not limited.
In an alternate embodiment of the invention, the output parameter may include output current, and first parameter threshold includes current threshold;
It is described that the output parameter is compared with default first parameter threshold, and meet default comparison rule in comparative result
When, determining that the power circuit meets default alternately hair ripple condition, can be specially:Judge the output electricity of the power circuit
Whether stream is less than default current threshold;If being less than the current threshold, it is determined that the power circuit meets default alternating
Hair ripple condition.
Specifically, a current threshold can be pre-set, such that it is able to detect the output current of power circuit, such as pass through
Output current sampling circuit samples obtain the output current.When the output current for detecting the power circuit is less than the current threshold
When can determine that the power circuit meets alternately hair ripple condition so that controllable first controlled resonant converter and the second controlled resonant converter are handed over
For hair ripple.Optionally, the detection operation of the output current can be held into triggering after Burst patterns detecting power circuit
Capable, such as, into after Burst patterns, first controlled resonant converter and the second controlled resonant converter can be first in power circuit
Synchronous hair drives and closes and drives, and carries out current detecting, when the output current for detecting power circuit is less than the current threshold,
First controlled resonant converter and the second controlled resonant converter can carry out alternately hair ripple;Or, the detection operation of the output current
Can carry out in real time, the embodiment of the present invention is not limited.
In an alternate embodiment of the invention, the power circuit may also include loop control unit, and the output parameter can include output
Power, first parameter threshold may include power threshold;The output parameter for obtaining the power circuit, can be specially:
The output voltage and output current of the power circuit are obtained, and the loop is determined based on the output voltage and output current
The power output of controller.Further, it is described that the output parameter is compared with default first parameter threshold, and
When comparative result meets default comparison rule, determine that the power circuit meets default alternately hair ripple condition, can be specific
For:Judge the power output whether less than default power threshold;If being less than the power threshold, it is determined that the power supply electricity
Road meets default alternately hair ripple condition.
Specifically, can also pre-set a power threshold.Loop control unit can by obtain power circuit output electricity
Pressure and output current are calculated power output, and can determine the power circuit when the power output is less than the power threshold
Alternately hair ripple condition is met, so that controllable first controlled resonant converter and the second controlled resonant converter replace hair ripple.Optionally, this is defeated
The detection operation for going out power can detected power circuit into triggering execution after Burst patterns, such as, entering
After Burst patterns, first controlled resonant converter and the second controlled resonant converter first can synchronously send out driving and close in power circuit
Drive, and carry out power detection, when the power output for detecting power circuit is less than the power threshold, first resonant transformation
Device and the second controlled resonant converter can carry out alternately hair ripple;Or, the detection operation of the power output can also be carried out in real time
, the embodiment of the present invention is not limited.
Further alternative, the first startup time for driving is identical with the second startup time for driving every time every time.
That is, first controlled resonant converter and the second controlled resonant converter are when alternately hair ripple is carried out, first controlled resonant converter
Each time for sending out period of wave of each hair period of wave and the second controlled resonant converter can be identical.
Further alternative, the preset time threshold can be that the size of the output parameter according to power circuit is determined
's.Wherein, the output parameter can be including at least one in output voltage, output current and power output.For example, this is defeated
The value such as output voltage for going out parameter is smaller, and the preset time threshold can be bigger;The value of the output parameter is bigger, the Preset Time
Threshold value can be with smaller.So that when the hair ripple that controlled resonant converter is alternately carried out in hair ripple mechanism switches, choppy is less defeated
Go out ripple more smooth.
It is further alternative, when the output parameter of power circuit exceedes default second parameter threshold, can also be simultaneously
Start first driving and second to drive.Wherein, the parameter type of second parameter threshold can be with the parameter of the output parameter
Type is identical.Further alternative, the parameter type of second parameter threshold can be with the parameter type phase of the first parameter threshold
Together, and second parameter threshold can be more than first parameter threshold.Specifically, a second parameter threshold can be pre-set
Value, second parameter threshold can be different from first parameter threshold, such as second parameter threshold could be arranged to be slightly above
First parameter threshold, namely cause that return difference should be left between the two, to prevent from sending out ripple in Rule of judgment critical point frequent switching
Mechanism.First controlled resonant converter and the are can control when the value of the output parameter of power circuit exceedes second parameter threshold
Two controlled resonant converters exit this and staggeredly send out ripple mechanism.Further, exit after the hair ripple mechanism of interlocking, can remain at
Burst patterns, such as the first controlled resonant converter and the second controlled resonant converter can be driven or be closed the hair ripple for driving using synchronous hair
Mechanism;Or the Burst patterns can be directly exited, the embodiment of the present invention is not limited.
In embodiments of the present invention, can be by detecting whether the value of the output parameter of power circuit determines the power circuit
Meet default alternately hair ripple condition, and when alternating hair ripple condition is met, carry out the alternating hair of a LLC and the 2nd LLC
Ripple, so as to reduce voltage ripple peak-to-peak value and current ripples peak-to-peak value of the positive and negative busbar LLC circuits in low pressure underloading, and by
The same time only has LLC work all the way when low pressure underloading, now dashes forward when cutting heavy duty, can suppress current over pulse so that extension
The service life of battery.Additionally, by two-way LLC circuit alternations, its working frequency is low when being worked than two-way simultaneously, from
And voltage stress and thermal stress can be improved.
In the above-described embodiments, can come real wholly or partly by software, hardware, firmware or its any combination
It is existing.When implemented in software, can realize in the form of a computer program product whole or in part.The computer program
Product includes one or more computer instructions.When loading on computers and performing the computer program instructions, all or
Partly produce according to the flow or function described in the embodiment of the present invention.The computer can be all-purpose computer, special meter
Calculation machine, computer network or other programmable devices.The computer instruction can be stored in computer-readable recording medium
In, or transmitted from a computer-readable recording medium to another computer-readable recording medium, for example, the computer
Instruction can be from web-site, computer, server or a data center by wired (such as coaxial cable, optical fiber, numeral
User's line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or
Data center is transmitted.The computer-readable recording medium can be any usable medium that computer can be accessed or
It is comprising data storage devices such as the integrated server of one or more usable mediums, data centers.The usable medium can be with
It is magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disc
Solid State Disk (SSD)) etc..
Claims (18)
1. a kind of drive control method, is applied in power circuit, and the power circuit includes the first controlled resonant converter and second
Controlled resonant converter, it is characterised in that including:
When the power circuit meets default alternately hair ripple condition, start the first driving of first controlled resonant converter,
And close the second driving of second controlled resonant converter;
Detect whether the described first startup time for driving reached preset time threshold;
If reaching the preset time threshold, close described first and drive, and open described second and drive.
2. method according to claim 1, it is characterised in that methods described also includes:
Obtain the output parameter of the power circuit;
The output parameter is compared with default first parameter threshold, and meets default comparison rule in comparative result
When, determine that the power circuit meets default alternately hair ripple condition;
Wherein, the parameter type of first parameter threshold is identical with the parameter type of the output parameter.
3. method according to claim 2, it is characterised in that the output parameter includes output voltage, first ginseng
Number threshold value includes voltage threshold;
It is described that the output parameter is compared with default first parameter threshold, and meet default comparing in comparative result
When regular, determine that the power circuit meets default alternately hair ripple condition, including:
Judge the output voltage of the power circuit whether less than default voltage threshold;
If being less than the voltage threshold, it is determined that the power circuit meets default alternately hair ripple condition.
4. method according to claim 2, it is characterised in that the output parameter includes output current, first ginseng
Number threshold value includes current threshold;
It is described that the output parameter is compared with default first parameter threshold, and meet default comparing in comparative result
When regular, determine that the power circuit meets default alternately hair ripple condition, including:
Judge the output current of the power circuit whether less than default current threshold;
If being less than the current threshold, it is determined that the power circuit meets default alternately hair ripple condition.
5. method according to claim 2, it is characterised in that the power circuit also includes loop control unit, described defeated
Going out parameter includes power output, and first parameter threshold includes power threshold;
The output parameter for obtaining the power circuit, including:
The output voltage and output current of the power circuit are obtained, and is determined based on the output voltage and output current described
The power output of loop control unit;
It is described that the output parameter is compared with default first parameter threshold, and meet default comparing in comparative result
When regular, determine that the power circuit meets default alternately hair ripple condition, including:
Judge the power output whether less than default power threshold;
If being less than the power threshold, it is determined that the power circuit meets default alternately hair ripple condition.
6. the method according to claim any one of 1-5, it is characterised in that every time the described first startup time for driving and
The described second startup time for driving is identical every time.
7. method according to claim 6, it is characterised in that the preset time threshold is according to the power circuit
What the size of output parameter was determined;
Wherein, the output parameter includes at least one in output voltage, output current and power output.
8. the method according to claim any one of 2-5, it is characterised in that methods described also includes:
When the output parameter of the power circuit exceedes default second parameter threshold, while start described first driving and institute
State the second driving;
Wherein, the parameter type of second parameter threshold is identical with the parameter type of the output parameter.
9. method according to claim 8, it is characterised in that the parameter type of second parameter threshold and described first
The parameter type of parameter threshold is identical, and second parameter threshold is more than first parameter threshold.
10. a kind of power circuit, the power circuit includes processor, the first controlled resonant converter and the second controlled resonant converter, its
It is characterised by,
The processor, for when the power circuit meets default alternately hair ripple condition, starting first resonance and becoming
First driving of parallel operation, and close the second driving of second controlled resonant converter;
Whether the processor, the startup time for being additionally operable to detection first driving reaches preset time threshold, and is reaching
During the preset time threshold, close described first and drive, and open described second and drive.
11. power circuits according to claim 10, it is characterised in that
The processor, is additionally operable to obtain the output parameter of the power circuit, by the output parameter and the default first ginseng
Number threshold value is compared, and when comparative result meets default comparison rule, determines that the power circuit meets default friendship
For hair ripple condition;
Wherein, the parameter type of first parameter threshold is identical with the parameter type of the output parameter.
12. power circuits according to claim 11, it is characterised in that the output parameter includes output voltage, described
First parameter threshold includes voltage threshold;
The processor perform it is described the output parameter is compared with default first parameter threshold, and comparing knot
Fruit is when meeting default comparison rule, when determining that the power circuit meets default alternately hair ripple condition specifically for:
Judge the output voltage of the power circuit whether less than default voltage threshold;
If being less than the voltage threshold, it is determined that the power circuit meets default alternately hair ripple condition.
13. power circuits according to claim 11, it is characterised in that the output parameter includes output current, described
First parameter threshold includes current threshold;
The processor perform it is described the output parameter is compared with default first parameter threshold, and comparing knot
Fruit is when meeting default comparison rule, when determining that the power circuit meets default alternately hair ripple condition specifically for:
Judge the output current of the power circuit whether less than default current threshold;
If being less than the current threshold, it is determined that the power circuit meets default alternately hair ripple condition.
14. power circuits according to claim 11, it is characterised in that the power circuit also includes loop control unit,
The output parameter includes power output, and first parameter threshold includes power threshold;
When obtaining the output parameter of the power circuit described in the computing device specifically for:
The output voltage and output current of the power circuit are obtained, and is determined based on the output voltage and output current described
The power output of loop control unit;
The processor perform it is described the output parameter is compared with default first parameter threshold, and comparing knot
Fruit is when meeting default comparison rule, when determining that the power circuit meets default alternately hair ripple condition specifically for:
Judge the power output whether less than default power threshold;
If being less than the power threshold, it is determined that the power circuit meets default alternately hair ripple condition.
15. power circuit according to claim any one of 10-14, it is characterised in that every time it is described first drive open
The dynamic time is identical with the described second startup time for driving every time.
16. power circuits according to claim 15, it is characterised in that the preset time threshold is according to the power supply
What the size of the output parameter of circuit was determined;
Wherein, the output parameter includes at least one in output voltage, output current and power output.
17. power circuit according to claim any one of 11-14, it is characterised in that
The processor, is additionally operable to when the output parameter of the power circuit exceedes default second parameter threshold, while opening
Dynamic described first drives and the described second driving;
Wherein, the parameter type of second parameter threshold is identical with the parameter type of the output parameter.
18. power circuits according to claim 17, it is characterised in that the parameter type of second parameter threshold and institute
The parameter type for stating the first parameter threshold is identical, and second parameter threshold is more than first parameter threshold.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107276190A (en) * | 2017-05-27 | 2017-10-20 | 华为技术有限公司 | The Wave method and device, equipment of a kind of underloading ripple |
CN114362269A (en) * | 2020-10-13 | 2022-04-15 | 比亚迪股份有限公司 | Charging device, method for controlling charging of charging device, and vehicle |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1716739A (en) * | 2004-06-29 | 2006-01-04 | 因芬尼昂技术股份公司 | DC voltage converter and method for converting a DC voltage |
JP2010263701A (en) * | 2009-05-07 | 2010-11-18 | Tabuchi Electric Co Ltd | Isolated dc-dc converter |
CN102364861A (en) * | 2011-10-27 | 2012-02-29 | 上海大学 | Control device and method for interleaved parallel LLC (Logical Link Control) resonant converter |
CN103023362A (en) * | 2012-02-27 | 2013-04-03 | 无锡联动太阳能科技有限公司 | Bridgeless inverter circuit and solar bridgeless inverter |
CN103457471A (en) * | 2013-09-13 | 2013-12-18 | 华为技术有限公司 | Resonant converter |
CN104079179A (en) * | 2014-07-09 | 2014-10-01 | 河北先控捷联电源设备有限公司 | Resonant converter and direct-current power supply |
CN105576983A (en) * | 2016-02-19 | 2016-05-11 | 杭州中恒电气股份有限公司 | Resonant direct-current/direct-current converter |
-
2017
- 2017-03-31 CN CN201710211045.7A patent/CN106787653B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1716739A (en) * | 2004-06-29 | 2006-01-04 | 因芬尼昂技术股份公司 | DC voltage converter and method for converting a DC voltage |
JP2010263701A (en) * | 2009-05-07 | 2010-11-18 | Tabuchi Electric Co Ltd | Isolated dc-dc converter |
CN102364861A (en) * | 2011-10-27 | 2012-02-29 | 上海大学 | Control device and method for interleaved parallel LLC (Logical Link Control) resonant converter |
CN103023362A (en) * | 2012-02-27 | 2013-04-03 | 无锡联动太阳能科技有限公司 | Bridgeless inverter circuit and solar bridgeless inverter |
CN103457471A (en) * | 2013-09-13 | 2013-12-18 | 华为技术有限公司 | Resonant converter |
CN104079179A (en) * | 2014-07-09 | 2014-10-01 | 河北先控捷联电源设备有限公司 | Resonant converter and direct-current power supply |
CN105576983A (en) * | 2016-02-19 | 2016-05-11 | 杭州中恒电气股份有限公司 | Resonant direct-current/direct-current converter |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107276190A (en) * | 2017-05-27 | 2017-10-20 | 华为技术有限公司 | The Wave method and device, equipment of a kind of underloading ripple |
CN107276190B (en) * | 2017-05-27 | 2020-02-21 | 华为技术有限公司 | Light-load ripple wave sending method, device and equipment |
CN114362269A (en) * | 2020-10-13 | 2022-04-15 | 比亚迪股份有限公司 | Charging device, method for controlling charging of charging device, and vehicle |
WO2022078126A1 (en) * | 2020-10-13 | 2022-04-21 | 比亚迪股份有限公司 | Charging apparatus, method for controlling charging of charging apparatus, and vehicle |
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