CN108155801A - The control method of electric vehicle and its DC-DC converter and DC-DC converter - Google Patents
The control method of electric vehicle and its DC-DC converter and DC-DC converter Download PDFInfo
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- CN108155801A CN108155801A CN201611109726.4A CN201611109726A CN108155801A CN 108155801 A CN108155801 A CN 108155801A CN 201611109726 A CN201611109726 A CN 201611109726A CN 108155801 A CN108155801 A CN 108155801A
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses the control methods of a kind of electric vehicle and its DC DC converters and DC DC converters, wherein, DC DC converters include H bridges, and H bridges include first switch pipe, second switch pipe, third switching tube and the 4th switching tube, control method and include the following steps：When DC DC converters are worked every time, it obtains the setting time Tx of control H bridges in the first way and controls the setting time Ty of H bridges in a second manner, when controlling H bridges in the first way, using the first bridge arm as leading-bridge, and using the second bridge arm as lagging leg；When controlling H bridges in a second manner, using the second bridge arm as leading-bridge, and using the first bridge arm as lagging leg；H bridges are carried out according to Tx and Ty alternately to control to carry out temperature equalization control to first switch pipe, second switch pipe, third switching tube and the 4th switching tube, so that the fever relative equilibrium of first to fourth switching tube, the working life of switching tube in H bridges is improved.
Description
Technical field
The present invention relates to electric vehicle engineering field, more particularly to a kind of control method of DC-DC converter, a kind of DC-
DC converters and a kind of electric vehicle.
Background technology
DC-DC converter is always the important component part of field of power electronics, along with the commercialized hair of electric vehicle
Exhibition, DC-DC converter have also become one of important spare part on electric vehicle.The topological structure of DC-DC converter have very much,
Medium-and-large-sized power domain, full bridge PWM converter are a kind of most commonly used topologys.
Wherein, the control mode of full bridge PWM converter has very much, and uses the control of phase shift modulation in the relevant technologies mostly
Mode and the control mode of down tube modulation.However, using phase shift modulation control mode when, advanced arm Sofe Switch easy to implement,
And lagging leg is not easy to realize Sofe Switch, so as to which lagging leg is more serious than the fever of advanced arm；During the control mode modulated using down tube, on
Sofe Switch easy to implement is managed, and down tube is not easy to realize Sofe Switch, so as to which down tube is more serious than upper tube fever.
Therefore, both the above control mode can lead to switching tube fever serious problems, influence the working life of switching tube.
Invention content
One of the technical issues of the present invention is directed to solve at least to a certain extent in above-mentioned technology.For this purpose, the present invention
First purpose be to propose a kind of control method of DC-DC converter, enables to first to fourth switching tube in H bridges
Fever relative equilibrium improves the working life of switching tube in H bridges.
Second object of the present invention is to propose a kind of DC-DC converter.Third object of the present invention is to propose
A kind of electric vehicle.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of control method of DC-DC converter, described
DC-DC converter includes H bridges, and the H bridges include first switch pipe, second switch pipe, third switching tube and the 4th switching tube,
In, the first switch pipe and the second switch pipe form the first bridge arm, the third switching tube and the 4th switching tube
The second bridge arm is formed, the control method includes the following steps：When the DC-DC converter is worked every time, obtain with
First method controls setting time Tx of the H bridges and controls the setting time Ty of the H bridges in a second manner, wherein, with institute
When stating the first method control H bridges, using first bridge arm as leading-bridge, and using second bridge arm as lag bridge
Arm；When controlling the H bridges with the second method, using second bridge arm as leading-bridge, and first bridge arm is made
For lagging leg；The H bridges are carried out alternately to control with to described the according to the setting time Tx and the setting time Ty
One switching tube, second switch pipe, third switching tube and the 4th switching tube carry out temperature equalization control.
The control method of DC-DC converter according to embodiments of the present invention, when DC-DC converter is worked every time,
Obtain in the first way control H bridges setting time Tx and in a second manner control H bridges setting time Ty, then according to Tx with
Ty carries out H bridges alternately to control with equal into trip temperature to first switch pipe, second switch pipe, third switching tube and the 4th switching tube
Weighing apparatus control so that the fever relative equilibrium of each switching tube in the case where not increasing cost, improves the work of switching tube in H bridges
Make the service life, so as to extend the life cycle of DC-DC converter.
In order to achieve the above objectives, a kind of DC-DC converter that another aspect of the present invention embodiment proposes, including：H bridges, institute
It states H bridges and includes first switch pipe, second switch pipe, third switching tube and the 4th switching tube, wherein, the first switch pipe and institute
It states second switch pipe and forms the first bridge arm, the third switching tube and the 4th switching tube form the second bridge arm；Control module,
The control module is used to obtain when the DC-DC converter is worked every time controls setting for the H bridges in the first way
It puts time Tx and controls the setting time Ty of the H bridges in a second manner, and according to the setting time Tx and during the setting
Between Ty to the H bridges carry out alternately control with to the first switch pipe, second switch pipe, third switching tube and the 4th switching tube
Temperature equalization control is carried out, wherein, when controlling the H bridges with the first method, the control module is by first bridge arm
As leading-bridge, and using second bridge arm as lagging leg；When controlling the H bridges with the second method, the control
Molding block is using second bridge arm as leading-bridge, and using first bridge arm as lagging leg.
DC-DC converter according to embodiments of the present invention when being worked every time, is obtained by control module with first
Mode control H bridges setting time Tx and in a second manner control H bridges setting time Ty, then according to Tx and Ty to H bridges into
Alternately control to carry out temperature equalization control to first switch pipe, second switch pipe, third switching tube and the 4th switching tube, makes row
The fever relative equilibrium of each switching tube is obtained, in the case where not increasing cost, improves the working life of switching tube in H bridges, from
And extend life cycle.
In addition, the embodiment of the present invention also proposed a kind of electric vehicle, including above-mentioned DC-DC converter.
The electric vehicle of the embodiment of the present invention when above-mentioned DC-DC converter is per task, can be realized in H bridges
First switch pipe, second switch pipe, third switching tube and the 4th switching tube carry out temperature equalization control so that each switching tube
Fever relative equilibrium, in the case where not increasing cost, improve H bridges in switching tube working life, so as to extend DC-DC
The life cycle of converter.
Description of the drawings
Fig. 1 is the circuit diagram according to the DC-DC converter of one embodiment of the invention；
Fig. 2 is the flow chart according to the control method of the DC-DC converter of the embodiment of the present invention；
Fig. 3 is four when being controlled using first method the H bridges switching tube according to one embodiment of the invention
Drive waveforms schematic diagram；
Fig. 4 is four when being controlled using second method the H bridges switching tube according to one embodiment of the invention
Drive waveforms schematic diagram；
Fig. 5 is the flow chart according to the control method of the DC-DC converter of a specific embodiment of the invention；
Fig. 6 is the block diagram according to the electric vehicle of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
With reference to the accompanying drawings come describe the embodiment of the present invention proposition DC-DC converter control method, DC-DC converter
And the electric vehicle with the DC-DC converter.
As shown in Figure 1, DC-DC converter according to an embodiment of the invention includes H bridges, H bridges may include first switch
Pipe Q1, second switch pipe Q2, third switching tube Q3 and the 4th switching tube Q4.Wherein, first switch pipe Q1 and second switch pipe Q2
The first bridge arm is formed, third switching tube Q3 and the 4th switching tube Q4 form the second bridge arm, first switch pipe Q1 and second switch pipe
Between Q2 there is first node A, there is second node B between third switching tube Q3 and the 4th switching tube Q4.
Also, as shown in Figure 1, the DC-DC converter further includes transformer, the first inductance L1, the first capacitance C1, the second electricity
Sense L2 and the second capacitance C2, the 5th switching tube Q5, the 6th switching tube Q6, one end of the first inductance L1 are connected with first node A, the
The other end of one inductance L1 is connected with one end of the first capacitance C1, the other end of the first capacitance C1 and the armature winding of transformer
One end is connected, and the other end of the armature winding of transformer is connected with second node B.The secondary windings of transformer connects the 5th respectively
Switching tube Q5 and the 6th switching tube Q6, the second inductance L2 and the second capacitance C2 are connected to the output terminal of DC-DC converter.
In an embodiment of the present invention, as shown in Fig. 2, the control method of above-mentioned DC-DC converter includes the following steps：
S1, when DC-DC converter is worked every time, obtain in the first way control H bridges setting time Tx and with
Second method controls the setting time Ty of H bridges.Wherein, when controlling the H bridges with the first method, first bridge arm is made
For leading-bridge, and using second bridge arm as lagging leg；When controlling the H bridges with the second method, by described the
Two bridge arms are as leading-bridge, and using first bridge arm as lagging leg.
According to one embodiment of present invention, it when controlling the H bridges with the first method, exports to first switch pipe Q1
Control signal and output to second switch pipe Q2 control signal is complementary and output to third switching tube Q3 control signal
With exporting to the control signal complementation of the 4th switching tube Q4, and first switch pipe Q1 previous phase angles super than the 4th switching tube Q4
It opens and second switch pipe Q2 previous phase angles super than third switching tube Q3 is open-minded.
Specifically, the drive of the drive waveforms of first switch pipe Q1, the drive waveforms of second switch pipe Q2, third switching tube Q3
Voltage U between two bridge arms of dynamic waveform, the drive waveforms of the 4th switching tube Q4 and H bridgesABWaveform is as shown in Figure 3.From Fig. 3
It can obtain, the control signal of Q1, Q2 are complementary in four switching tubes of H bridges, and the control signal of Q3, Q4 are complementary, diagonal wiretap
Pipe Q1 is super than Q4, and previous phase angle is open-minded, and Q2 is super than Q3, and previous phase angle is open-minded.Also, by adjusting the big of the phase angle
It is small to adjust output voltage.
Also, when controlling the H bridges with the second method, export to the control signal of first switch pipe Q1 with exporting extremely
The control signal of second switch pipe Q2 is complementary and exports to the control signal of third switching tube Q3 and output to the 4th switching tube
The control signal of Q4 is complementary, and the 4th switching tube Q4 previous phase angles super than first switch pipe Q1 are opened and third switch
Pipe Q3 is super than second switch pipe Q2, and previous phase angle is open-minded.
Specifically, the drive of the drive waveforms of first switch pipe Q1, the drive waveforms of second switch pipe Q2, third switching tube Q3
Voltage U between two bridge arms of dynamic waveform, the drive waveforms of the 4th switching tube Q4 and H bridgesABWaveform is as shown in Figure 4.From Fig. 4
It can obtain, the control signal of Q1, Q2 are complementary in four switching tubes of H bridges, and the control signal of Q3, Q4 are complementary, diagonal wiretap
Pipe Q4 is super than Q1, and previous phase angle is open-minded, and Q3 is super than Q2, and previous phase angle is open-minded.Equally, by adjusting the big of the phase angle
It is small to adjust output voltage.
S2 carries out H bridges alternately to control with to first switch pipe, second switch according to setting time Tx and setting time Ty
Pipe, third switching tube and the 4th switching tube carry out temperature equalization control.
Wherein, it should be noted that in the course of work of DC-DC converter, if only with first method A to H bridges
It is controlled, Sofe Switch i.e. zero voltage switch is difficult to realize as switching tube Q3, Q4 in lagging leg, therefore switching tube Q3,
The switching loss of Q4 is big, causes to overheat.
Similarly, in the course of work of DC-DC converter, if controlled only with second method B H bridges, make
Sofe Switch i.e. zero voltage switch, therefore the switching loss of switching tube Q1, Q2 are difficult to realize for switching tube Q1, Q2 in lagging leg
Greatly, cause to overheat.
Therefore, in an embodiment of the present invention, when DC-DC converter is per task, Tx and Ty is first set, then in DC-
In the course of work of DC converters, can DC-DC converter, which works, first be controlled such that H bridges using first method A, directly
Reach Tx to using the time that first method A controls H bridges, be switched to and H bridges are controlled such that using second method B
DC-DC converter works, until reaching Ty using the time that second method B controls H bridges, so completes a work
(i.e. a net cycle time=Tx+Ty) is recycled, then is switched to and DC-DC is controlled such that H bridges using first method A
Converter works, until reaching Tx using the time that first method A controls H bridges, then switches to using second
Mode B is controlled such that DC-DC converter works to H bridges, until using second method B to H bridges controlled when
Between reach Ty ... ..., be so repeated, realize to H bridges carry out alternately control, opened so as to fulfill to first switch pipe, second
Guan Guan, third switching tube and the 4th switching tube carry out temperature equalization control.Certainly, in the course of work of DC-DC converter,
Can DC-DC converter, which works, first be controlled such that H bridges using second method B, until using second method B to H bridges
The time controlled reaches Ty, is switched to and is controlled such that DC-DC converter works to H bridges using first method A,
Until reaching Tx using the time that first method A controls H bridges, a working cycles are so completed, and according to such
Working cycles are repeated, until DC-DC converter stops this task.
In other words, alternately control, packet carry out the H bridges according to setting time Tx and setting time Ty in above-mentioned steps S2
It includes：When the time of the H bridges being controlled to reach Tx using the first method, the H bridges are carried out using the second method
Control, until reaching Ty using the time of the second method control H bridges；Or when using second method control institute
When stating time of H bridges and reaching Ty, the H bridges are controlled using the first method, until using the first method control
The time for making the H bridges reaches Tx.
It should be noted that in an embodiment of the present invention, H bridges are either controlled in the first way still with second
Mode controls H bridges, and what DC-DC converter used is all the control mode of phase shift modulation.Wherein, first to fourth switching tube is equal
It is driven using 50% duty ratio, the driving voltage of same bridge arm is complementary, phase difference 180 degree, and leading-bridge and lagging leg
Between differ a phase angle, adjust output voltage by adjusting the size at the phase angle.
According to one embodiment of present invention, setting time Tx controlled with the first method the H bridges etc.
In the setting time Ty controlled with the second method the H bridges, can ensure so in the first way and second party
Formula ensures first switch pipe Q1, second switch pipe Q2, third switching tube Q3 and the 4th switching tube Q4 fever phases when alternately controlling H bridges
To balance.
It is, of course, understood that in other embodiments of the invention, the H bridges are carried out with the first method
Setting time Tx of control can not also be equal with the setting time Ty controlled with the second method the H bridges.
Specifically, according to one embodiment of present invention, as shown in figure 5, the control method of above-mentioned DC-DC converter
Include the following steps：
S501, work start, i.e., when DC-DC converter starts and starts to work, output control waveform are needed to come in H bridges
Switching tube controlled.
S502 sets Tx and Ty.
S503 is controlled such that DC-DC converter works using first method A to H bridges, and is converted in DC-DC
Judge whether this task of DC-DC converter terminates in the course of work of device, if so, terminating flow, continue if not, returning
Judge.
S504 judges whether the time using first method A control H bridges reaches Tx.If so, perform step S505；Such as
Fruit is no, return to step S503.
S505 is controlled such that DC-DC converter works using second method B to H bridges, and is converted in DC-DC
Judge whether this task of DC-DC converter terminates in the course of work of device, if so, terminating flow, continue if not, returning
Judge.
S506 judges whether the time using second method B control H bridges reaches Ty.Step is performed if so, returning
S503；If not, return to step S505.
In conclusion the control method of the DC-DC converter of the embodiment of the present invention can make DC-DC converter per task
Ensure first switch pipe, second switch pipe, third switching tube and the 4th switching tube fever relative equilibrium in the process, without increasing volume
Outer component reduces cost, and improves the working life of DC-DC converter.
The control method of DC-DC converter according to embodiments of the present invention, when DC-DC converter is worked every time,
Obtain in the first way control H bridges setting time Tx and in a second manner control H bridges setting time Ty, then according to Tx with
Ty carries out H bridges alternately to control with equal into trip temperature to first switch pipe, second switch pipe, third switching tube and the 4th switching tube
Weighing apparatus control so that the fever relative equilibrium of each switching tube in the case where not increasing cost, improves the work of switching tube in H bridges
Make the service life, so as to extend the life cycle of DC-DC converter.
As shown in Figure 1, DC-DC converter according to embodiments of the present invention includes H bridges and such as MCU of control module 100
(Micro Control Unit, microcontroller).Wherein, H bridges include first switch pipe Q1, second switch pipe Q2, third switch
Pipe Q3 and the 4th switching tube Q4, first switch pipe Q1 and second switch pipe Q2 form the first bridge arm, third switching tube Q3 and the 4th
Switching tube Q4 forms the second bridge arm, has first node A, third switching tube Q3 between first switch pipe Q1 and second switch pipe Q2
There is second node B between the 4th switching tube Q4.Control module 100 is used to work every time in the DC-DC converter
When obtain control setting time Tx of the H bridges in the first way and control the setting time Ty of the H bridges in a second manner, and
The H bridges are carried out alternately to control with to the first switch pipe, the according to the setting time Tx and the setting time Ty
Two switching tubes, third switching tube and the 4th switching tube carry out temperature equalization control, wherein, the H is controlled with the first method
During bridge, the control module is using first bridge arm as leading-bridge, and using second bridge arm as lagging leg；With institute
When stating second method and controlling the H bridges, the control module is using second bridge arm as leading-bridge, and by first bridge
Arm is as lagging leg.
According to one embodiment of present invention, the control module according to setting time Tx and sets time Ty to the H
When bridge alternately control, wherein, when the time of the H bridges being controlled to reach Tx using the first method, the control mould
Block controls the H bridges using the second method, until the time for controlling the H bridges using the second method reaches
Ty；Or when the time of the H bridges being controlled to reach Ty using the second method, the control module uses the first party
Formula controls the H bridges, until the time for controlling the H bridges using the first method reaches Tx.
That is, in an embodiment of the present invention, when DC-DC converter is per task, control module first set Tx and
Ty then in the course of work of DC-DC converter, can first be controlled such that H bridges using first method A that DC-DC is converted
Device works, until reaching Tx using the time that first method A controls H bridges, is switched to using second method B to H
Bridge is controlled such that DC-DC converter works, until Ty is reached using the time that second method B controls H bridges,
So complete a working cycles (i.e. a net cycle time=Tx+Ty), then be switched to using first method A to H bridges into
Row controls so that DC-DC converter works, until reaching Tx using the time that first method A controls H bridges, then
It is switched to and DC-DC converter, which works, to be controlled such that H bridges using second method B, until using second method B to H
The time that bridge is controlled reaches Ty ... ..., is so repeated, and realizes and alternately control is carried out to H bridges, so as to fulfill to first
Switching tube, second switch pipe, third switching tube and the 4th switching tube carry out temperature equalization control.Certainly, in DC-DC converter
In the course of work, control module also first can be controlled such that DC-DC converter works using second method B to H bridges, directly
Reach Ty to using the time that second method B controls H bridges, be switched to and H bridges are controlled such that using first method A
DC-DC converter works, until reaching Tx using the time that first method A controls H bridges, so completes a work
It recycles, and is repeated according to such working cycles, until DC-DC converter stops this task.
Wherein, in a preferred embodiment of the invention, the setting controlled with the first method the H bridges
Time Tx can be equal to the setting time Ty controlled with the second method the H bridges.It can ensure with first party in this way
Formula and second method ensure first switch pipe Q1, second switch pipe Q2, the switches of third switching tube Q3 and the 4th when alternately controlling H bridges
Pipe Q4 fever relative equilibriums.
It is, of course, understood that in other embodiments of the invention, the H bridges are carried out with the first method
Setting time Tx of control can not also be equal with the setting time Ty controlled with the second method the H bridges.
According to one embodiment of present invention, with the first method control the H bridges when, the control module export to
The control signal of the first switch pipe and the control signal of output to the second switch pipe be complementary and output is to described the
The control signal of three switching tubes and the control signal of output to the 4th switching tube are complementary, and described in the first switch pipe ratio
The super previous phase angle of 4th switching tube is opened and the second switch pipe previous phase angle super than the third switching tube
It is open-minded.
Also, when controlling the H bridges with the second method, the control module is exported to the control of the first switch pipe
Signal processed controls signal complementation and output to the control signal of the third switching tube with output to the second switch pipe
With exporting to the control signal complementation of the 4th switching tube, and the 4th switching tube is super more previous than the first switch pipe
Phase angle is opened and the third switching tube previous phase angle super than the second switch pipe is open-minded.
In an embodiment of the present invention, as shown in Figure 1, first switch pipe Q1, second switch pipe Q2, third switching tube Q3 and
4th switching tube Q4 is IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), when
So, in other embodiments of the invention, first switch pipe Q1, second switch pipe Q2, third switching tube Q3 and the 4th switching tube
Q4 may be metal-oxide-semiconductor.
DC-DC converter according to embodiments of the present invention when being worked every time, is obtained by control module with first
Mode control H bridges setting time Tx and in a second manner control H bridges setting time Ty, then according to Tx and Ty to H bridges into
Alternately control to carry out temperature equalization control to first switch pipe, second switch pipe, third switching tube and the 4th switching tube, makes row
The fever relative equilibrium of each switching tube is obtained, in the case where not increasing cost, improves the working life of switching tube in H bridges, from
And extend life cycle.
In addition, as shown in fig. 6, the embodiment of the present invention also proposed a kind of electric vehicle 10, including above-mentioned DC-DC
Converter 20.
The electric vehicle of the embodiment of the present invention when above-mentioned DC-DC converter is per task, can be realized in H bridges
First switch pipe, second switch pipe, third switching tube and the 4th switching tube carry out temperature equalization control so that each switching tube
Fever relative equilibrium, in the case where not increasing cost, improve H bridges in switching tube working life, so as to extend DC-DC
The life cycle of converter.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be based on orientation shown in the drawings or
Position relationship is for only for ease of the description present invention and simplifies description rather than instruction or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
It connects or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature right over second feature or oblique upper or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It is combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the different embodiments or examples described in this specification and the feature of different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (11)
1. a kind of control method of DC-DC converter, which is characterized in that the DC-DC converter includes H bridges, and the H bridges include
First switch pipe, second switch pipe, third switching tube and the 4th switching tube, wherein, the first switch pipe and described second is opened
It closes pipe and forms the first bridge arm, the third switching tube and the 4th switching tube form the second bridge arm, and the control method includes
Following steps：
When the DC-DC converter is worked every time, obtain control in the first way the H bridges setting time Tx and with
Second method controls the setting time Ty of the H bridges, wherein, when controlling the H bridges with the first method, by first bridge
Arm is as leading-bridge, and using second bridge arm as lagging leg；When controlling the H bridges with the second method, by institute
The second bridge arm is stated as leading-bridge, and using first bridge arm as lagging leg；
The H bridges are carried out alternately to control with to the first switch according to the setting time Tx and the setting time Ty
Pipe, second switch pipe, third switching tube and the 4th switching tube carry out temperature equalization control.
2. the control method of DC-DC converter as described in claim 1, which is characterized in that according to it is described setting time Tx and
The setting time Ty carries out the H bridges alternately control, specifically includes：
When the time of the H bridges being controlled to reach Tx using the first method, the H bridges are carried out using the second method
Control, until reaching Ty using the time of the second method control H bridges；Or
When the time of the H bridges being controlled to reach Ty using the second method, the H bridges are carried out using the first method
Control, until reaching Tx using the time of the first method control H bridges.
3. the control method of DC-DC converter as claimed in claim 1 or 2, which is characterized in that controlled with the first method
During the H bridges, export control signal to the control signal of the first switch pipe and output to the second switch pipe it is complementary,
And output is complementary and described to the control signal of the third switching tube and the control signal of output to the 4th switching tube
First switch pipe previous phase angle super than the 4th switching tube is opened and the second switch pipe is switched than the third
It is open-minded to manage super previous phase angle.
4. the control method of DC-DC converter as claimed in claim 1 or 2, which is characterized in that controlled with the second method
During the H bridges, export control signal to the control signal of the first switch pipe and output to the second switch pipe it is complementary,
And output is complementary and described to the control signal of the third switching tube and the control signal of output to the 4th switching tube
4th switching tube previous phase angle super than the first switch pipe is opened and the third switching tube is than the second switch
It is open-minded to manage super previous phase angle.
5. the control method of DC-DC converter as described in claim 1, which is characterized in that with the first method to the H
Setting time Tx that bridge is controlled is equal to the setting time Ty controlled with the second method the H bridges.
6. a kind of DC-DC converter, which is characterized in that including：
H bridges, the H bridges include first switch pipe, second switch pipe, third switching tube and the 4th switching tube, wherein, described first
Switching tube and the second switch pipe form the first bridge arm, and the third switching tube and the 4th switching tube form the second bridge
Arm；
Control module, the control module are controlled in the first way for being obtained when the DC-DC converter is worked every time
It makes setting time Tx of the H bridges and controls the setting time Ty of the H bridges in a second manner, and according to the setting time Tx
The H bridges are carried out alternately to control with to the first switch pipe, second switch pipe, third switching tube with the setting time Ty
Temperature equalization control is carried out with the 4th switching tube, wherein,
When controlling the H bridges with the first method, the control module is using first bridge arm as leading-bridge, and by institute
The second bridge arm is stated as lagging leg；
When controlling the H bridges with the second method, the control module is using second bridge arm as leading-bridge, and by institute
The first bridge arm is stated as lagging leg.
7. DC-DC converter as claimed in claim 6, which is characterized in that the control module is according to the setting time Tx
When to the H bridges alternately control with the setting time Ty, wherein,
When the time of the H bridges being controlled to reach Tx using the first method, the control module uses the second method
The H bridges are controlled, until the time for controlling the H bridges using the second method reaches Ty；Or
When the time of the H bridges being controlled to reach Ty using the second method, the control module uses the first method
The H bridges are controlled, until the time for controlling the H bridges using the first method reaches Tx.
8. DC-DC converter as claimed in claims 6 or 7, which is characterized in that when controlling the H bridges with the first method,
The control module exports mutual to the control signal of the first switch pipe and the control signal of output to the second switch pipe
Mending and export to the third switching tube controls signal and the control signal of output to the 4th switching tube complementary, and
The first switch pipe previous phase angle super than the 4th switching tube is opened and the second switch pipe is than the third
The super previous phase angle of switching tube is open-minded.
9. DC-DC converter as claimed in claims 6 or 7, which is characterized in that when controlling the H bridges with the second method,
The control module exports mutual to the control signal of the first switch pipe and the control signal of output to the second switch pipe
Mending and export to the third switching tube controls signal and the control signal of output to the 4th switching tube complementary, and
The 4th switching tube previous phase angle super than the first switch pipe is opened and the third switching tube is than described second
The super previous phase angle of switching tube is open-minded.
10. DC-DC converter as claimed in claim 6, which is characterized in that controlled with the first method to the H bridges
Setting time Tx of system is equal to the setting time Ty controlled with the second method the H bridges.
11. a kind of electric vehicle, which is characterized in that including the DC-DC converter as described in any one of claim 6-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611109726.4A CN108155801A (en) | 2016-12-02 | 2016-12-02 | The control method of electric vehicle and its DC-DC converter and DC-DC converter |
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| CN201611109726.4A CN108155801A (en) | 2016-12-02 | 2016-12-02 | The control method of electric vehicle and its DC-DC converter and DC-DC converter |
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|---|---|---|---|---|
| CN102791072A (en) * | 2011-05-20 | 2012-11-21 | 东软飞利浦医疗设备系统有限责任公司 | High power high voltage generator |
| CN104600998A (en) * | 2015-02-10 | 2015-05-06 | 四川英杰电气股份有限公司 | Method for controlling uniform heating of switch device of switch power source |
| US9214865B2 (en) * | 2010-04-20 | 2015-12-15 | Rf Micro Devices, Inc. | Voltage compatible charge pump buck and buck power supplies |
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2016
- 2016-12-02 CN CN201611109726.4A patent/CN108155801A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9214865B2 (en) * | 2010-04-20 | 2015-12-15 | Rf Micro Devices, Inc. | Voltage compatible charge pump buck and buck power supplies |
| CN102791072A (en) * | 2011-05-20 | 2012-11-21 | 东软飞利浦医疗设备系统有限责任公司 | High power high voltage generator |
| CN104600998A (en) * | 2015-02-10 | 2015-05-06 | 四川英杰电气股份有限公司 | Method for controlling uniform heating of switch device of switch power source |
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Application publication date: 20180612 |