CN109951058A - A kind of method and device for the switching loss reducing switching tube - Google Patents
A kind of method and device for the switching loss reducing switching tube Download PDFInfo
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- CN109951058A CN109951058A CN201711396677.1A CN201711396677A CN109951058A CN 109951058 A CN109951058 A CN 109951058A CN 201711396677 A CN201711396677 A CN 201711396677A CN 109951058 A CN109951058 A CN 109951058A
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Abstract
The invention discloses a kind of method and devices of switching loss for reducing switching tube, which comprises obtains the switch tube current of switching tube to be driven, the switch tube current is the electric current of circuit where the switching tube；According to the corresponding relationship of preset switch tube current and switching speed, target switch speed corresponding with the switch tube current is determined, wherein switching speed is the speed that the switching tube is opened or is the speed that the switching tube turns off；The switch of the switching tube is driven according to the target switch speed.
Description
Technical field
The present invention relates to power electronics field more particularly to a kind of methods and dress of the switching loss for reducing switching tube
It sets.
Background technique
Switching tube is the core devices in Switching Power Supply.The switching loss that switching tube generates is in the total losses of Switching Power Supply
Occupy significant specific gravity.How important research direction that switching loss be Switching Power Supply is reduced.
Due in Switching Power Supply in commutation circuit leakage inductance presence, (the electric current in the unit time of di/dt when the switching tube change of current
Variation) it acts on and can generate due to voltage spikes in leakage inductance, Switching Power Supply under bad working environments (such as overload or output short-circuit), big electricity
Stream causes very big due to voltage spikes in commutation circuit leakage inductance, if due to voltage spikes is more than the License Value of switching tube, will damage
Switching tube, currently, the switching speed of switching tube is designed relatively slow in order to guarantee that switch tube voltage spike is consistently less than License Value,
However, switching speed is slower, switching loss is bigger, results in the switching loss of switching tube very big.
Summary of the invention
The embodiment of the present invention provides a kind of method and device of switching loss for reducing switching tube, for guaranteeing switching tube
Due to voltage spikes is consistently less than the case where License Value, realizes and is switched on or off switching tube with maximum switching speed, to reduce switch
The technical effect of the switching loss of pipe.
For this purpose, in a first aspect, the embodiment of the invention provides a kind of methods of switching loss for reducing switching tube, comprising:
The switch tube current of switching tube to be driven is obtained, the switch tube current is the electricity of circuit where the switching tube
Stream；
According to the corresponding relationship of preset switch tube current and switching speed, mesh corresponding with the switch tube current is determined
Mark switching speed, wherein switching speed is the speed that the switching tube is opened or is the speed that the switching tube turns off；
The switch of the switching tube is driven according to the target switch speed.
Optionally, the switch that the switching tube is driven according to the target switch speed, comprising:
Acquisition is used to indicate the pulse width modulation (PWM) signal that the switching tube is switched on or off；
According to the pwm signal and the target switch speed, being switched on or off for the switching tube is driven.
Optionally, according to the pwm signal and the target switch speed, the open-minded of the switching tube is driven, comprising:
The switching tube is indicated when opening in the pwm signal, obtains the upper bridge arm in driving circuit is opened first
Quantity, wherein first quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, often
Level-one driving branch includes the upper bridge arm for driving the switching tube to open, and the upper bridge arm and the switching tube of every level-one connect
It connects；
The open-minded of the upper bridge arm of the first quantity in the driving circuit is controlled, and then drives the open-minded of the switching tube.
Optionally, according to the pwm signal and the target switch speed, the shutdown of the switching tube is driven, comprising:
The switching tube is indicated when turning off in the pwm signal, obtains the lower bridge arm in driving circuit is opened second
Quantity, wherein second quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, often
Level-one driving branch includes the lower bridge arm for driving the switching tube shutdown, and the lower bridge arm of every level-one and the switching tube connect
It connects；
The shutdown of the lower bridge arm of the second quantity in the driving circuit is controlled, and then drives the shutdown of the switching tube.
Optionally, the corresponding relationship according to preset switch tube current and switching speed, the determining and switching tube
The corresponding target switch speed of electric current, comprising:
Obtain preset multiple current threshold ranges；
Determine the first current threshold range corresponding with the switch tube current；
Determine target switch speed corresponding with the first current threshold range, wherein switching speed and current threshold
Range maps one by one.
Second aspect, the embodiment of the invention provides a kind of for reducing the device of the switching loss of switching tube, comprising:
Switching tube current sampling circuit, for obtaining the switch tube current of switching tube to be driven, the switch tube current
For the electric current of circuit where the switching tube；
Drive control device is connect with the switching tube current sampling circuit and driving circuit, the drive control respectively
Device is used to determine target corresponding with the switch tube current according to the corresponding relationship of preset switch tube current and switching speed
Switching speed, wherein switching speed is the speed that the switching tube is opened or is the speed that the switching tube turns off；
The driving circuit is connect with the switching tube, and the driving circuit is used to be driven according to the target switch speed
Move the switch of the switching tube.
Optionally, the driving circuit, is also used to:
Acquisition is used to indicate the pulse width modulation (PWM) signal that the switching tube is switched on or off；
According to the pwm signal and the target switch speed, being switched on or off for the switching tube is driven.
Optionally, the driving circuit, is also used to:
The switching tube is indicated when opening in the pwm signal, obtains the upper bridge arm in driving circuit is opened first
Quantity, wherein first quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, often
Level-one driving branch includes the upper bridge arm for driving the switching tube to open, and the upper bridge arm and the switching tube of every level-one connect
It connects；
The open-minded of the upper bridge arm of the first quantity in the driving circuit is controlled, and then drives the open-minded of the switching tube.
Optionally, the driving circuit, is also used to:
The switching tube is indicated when turning off in the pwm signal, obtains the lower bridge arm in driving circuit is opened second
Quantity, wherein second quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, often
Level-one driving branch includes the lower bridge arm for driving the switching tube shutdown, and the lower bridge arm of every level-one and the switching tube connect
It connects；
The shutdown of the lower bridge arm of the second quantity in the driving circuit is controlled, and then drives the shutdown of the switching tube.
Optionally, the drive control device, is also used to:
Obtain preset multiple current threshold ranges；
Determine the first current threshold range corresponding with the switch tube current；
Determine target switch speed corresponding with the first current threshold range, wherein switching speed and current threshold
Range maps one by one.
It is described using the switch tube current for obtaining switching tube to be driven due to the technical solution in the embodiment of the present invention
Switch the electric current that tube current is circuit where the switching tube；It is closed according to preset switch tube current is corresponding with switching speed
System determines target switch speed corresponding with the switch tube current, wherein switching speed is the speed that the switching tube is opened
Or the speed for switching tube shutdown；The technology of the switch of the switching tube is driven according to the target switch speed, namely
It is then, corresponding with switching speed according to preset switch tube current by obtaining the switch tube current of switching tube to be driven
Relationship determines target switch speed corresponding with the switch tube current obtained, then, according to the target switch S/CO
Pipe is switched on or off, thus it is possible to guaranteeing the case where switch tube voltage spike is consistently less than License Value, with maximum switch
S/CO pipe is switched on or off, so, there is the technical effect for the switching loss that can effectively reduce switching tube.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment.
Fig. 1 is a kind of flow chart of switching loss method for reducing switching tube provided in an embodiment of the present invention；
Fig. 2 is the circuit diagram for providing the acquisition of switching tube current sampling circuit in the embodiment of the present invention and closing tube current；
Fig. 3 is the flow chart of the specific implementation of step S102 in the embodiment of the present invention；
Fig. 4 A-4B is the structural schematic diagram of each circuit connection provided in an embodiment of the present invention；
Fig. 5 is the flow chart of the specific implementation of step S103 in the embodiment of the present invention；
Fig. 6 is the flow chart of the first specific implementation of step S302 in the embodiment of the present invention；
Fig. 7 A-7D is the structural schematic diagram of driving circuit in the embodiment of the present invention；
Fig. 8 is the flow chart of second of specific implementation of step S302 in the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution of the present invention is clearly and completely described, it is clear that described embodiment is skill of the present invention
A part of the embodiment of art scheme, instead of all the embodiments.Based on the embodiment recorded in file of the present invention, this field is general
Logical technical staff every other embodiment obtained without creative efforts, belongs to the technology of the present invention side
The range of case protection.
Referring to FIG. 1, for a kind of method for the switching loss for reducing switching tube provided in an embodiment of the present invention, comprising:
Step S101: obtaining the switch tube current of switching tube to be driven, and the switch tube current is the switching tube institute
In the electric current of circuit；
Step S102: determining electric with the switching tube according to the corresponding relationship of preset switch tube current and switching speed
Flow corresponding target switch speed, wherein switching speed is the speed that the switching tube is opened or is what the switching tube turned off
Speed；
Step S103: the switch of the switching tube is driven according to the target switch speed.
The above method in the embodiment of the present invention may be applicable to the circuit of control switch pipe being switched on or off or set
Standby to wait in devices, the above method in the embodiment of the present invention executes step S101, namely: obtain the switch of switching tube to be driven
Tube current, the switch tube current are the electric current of circuit where the switching tube.
In practical applications, it can go the switch tube current for obtaining switching tube to be driven can during concrete practice
To go to obtain the switch tube current of switching tube to be driven by switching tube current sampling circuit, such as pass through switching tube current sample
Circuit goes to obtain the switch tube current of switching tube to be opened, and for another example goes to obtain by switching tube current sampling circuit to be turned off
The switch tube current of switching tube, it will be appreciated by those skilled in the art that: switching tube current sampling circuit can be according to reality
Border needs to be designed, and does not just do excessive discussion herein.
The switch tube current of switching tube current sampling circuit acquisition can be the electric current of circuit where switching tube, for example, opening
Closing tube current can be the input current of the power supply product of circuit where switching tube；Switching tube current can be electric where switching tube
The output electric current of the power supply product on road；Other electric currents of circuit, figure where switch tube current can also be illustrated in figure 2 switching tube
What the i1 in 2 indicated the acquisition of switching tube current sampling circuit is the electric current for flowing through switching tube to be turned off, and the i2 expression in Fig. 2 is opened
Close the acquisition of tube current sample circuit is the electric current of the branch of switching tube to be opened, and certainly, switching tube current sampling circuit is adopted
The switch tube current of the switching tube to be switched on or off integrated can also be other electric currents of circuit where switching tube, here, just
It is not listed one by one.
The above method in the embodiment of the present invention executes step S102, namely: according to preset switch tube current and switch
The corresponding relationship of speed determines target switch speed corresponding with the switch tube current, wherein switching speed is the switch
The speed that pipe is opened or the speed for switching tube shutdown.
After the switch tube current for collecting switching tube to be driven by switching tube current sampling circuit, so that it may root
According to the corresponding relationship of pre-set switch tube current and switching speed, switch corresponding with collected switch tube current is determined
Above-mentioned determination switching speed corresponding with collected switch tube current is known as target switch here for sake of convenience by speed
Speed, referring to FIG. 3, in practical applications, above-mentioned steps S102 can also be implemented in the following way:
Step S201: preset multiple current threshold ranges are obtained；
Step S202: the first current threshold range corresponding with the switch tube current is determined；
Step S203: determine corresponding with the first current threshold range target switch speed, wherein switching speed and
Current threshold range maps one by one.
During concrete practice, multiple testing experiment can be carried out in advance, permitted guaranteeing that switch tube voltage peak value is less than
In the case where being worth, the corresponding maximum switching speed of the different switch tube current of test switching tube, it is assumed here that carry out in advance more
Secondary test experiments, test obtain shown in switch tube current and maximum switching speed corresponding relationship following table one:
Table one: the corresponding relationship of switch tube current and switching speed
| It switchs tube current A (ampere) | Switching speed us (microsecond) |
| 10-15 | 3 |
| 5-10 | 2 |
| 0-5 | 1 |
In table one, switching speed and the switching tube current threshold range of switching tube map one by one, when the switching tube electricity of acquisition
It is 3us that stream, which is greater than 10A and is less than or equal to the switching speed of corresponding maximum switching tube when 15A,；When the switch tube current of acquisition is big
The switching speed of corresponding maximum switching tube is 2us when 5A is less than or equal to 10A；When the switch tube current of acquisition is small greater than 0A
The switching speed of corresponding maximum switching tube is 1us when being equal to 5A.
Specifically, when switching tube is when opening, it is assumed that the switch to be opened acquired by switching tube current sampling circuit
The size of the switch tube current of pipe is 10A, then, in the switching tube electricity for collecting switching tube by switching tube current sampling circuit
After stream 10A, so that it may go to obtain pre-set multiple current threshold ranges as shown in Table 1, then from multiple current thresholds
It is worth in range and determines the first current threshold range corresponding with collected switch tube current 10A, according to table one it is found that with switch
The corresponding first current threshold range of tube current 10A is 5-10A, according to the switching tube of switching speed shown in table one and switching tube
Current threshold range one by one mapping relations it is found that determining is that the corresponding switching speed of 5-10A is with the first current threshold range
2us。
Likewise, when switching tube is when turning off, it is assumed that the switch to be turned off acquired by switching tube current sampling circuit
The size of the switch tube current of pipe is 4A, then, in the switching tube electricity for collecting switching tube by switching tube current sampling circuit
After stream 4A, so that it may go to obtain pre-set multiple current threshold ranges as shown in Table 1, then from multiple current thresholds
It is worth in range and determines the second current threshold range corresponding with collected switch tube current 4A, according to table one it is found that with switch
The corresponding second current threshold range of tube current 4A is 0-5A, according to the switching tube of switching speed shown in table one and switching tube electricity
Flow threshold range mapping relations one by one, determining be the corresponding switching speed of 0-5A with the first current threshold range is 1us.
Fig. 4 A-4B is please referred to, in practical applications, can be stored by drive control device and first pass through repeatedly test test in advance
The corresponding relationship of the switch tube current and switching speed as shown in Table 1 obtained, can also be arranged switch in drive control device
Tube current comparison module and switching speed selecting module.
In switching tube when opening, in the switch tube current 10A for collecting switching tube by switching tube current sampling circuit
Later, so that it may switching tube current comparing module and the preset multiple electricity being input to the electric current of acquisition in drive control device
Stream threshold range is compared, and then, the switch tube current 10A of comparison result namely the switching tube of acquisition is belonged to shown in table one
The first current threshold range 5-10A, the switching speed selecting module being sent in drive control device, so select with first electricity
Flow the corresponding switching speed 2us of threshold range 5-10A.
In switching tube when turning off, the switch tube current 4A that switching tube is collected by switching tube current sampling circuit it
Afterwards, so that it may switching tube current comparing module and the preset multiple electric currents being input to the electric current of acquisition in drive control device
Threshold range is compared, and then, the switch tube current 4A of comparison result namely the switching tube of acquisition is belonged to shown in table one
Second current threshold range 0-5A, the switching speed selecting module being sent in drive control device, and then select and the first electric current
The corresponding switching speed 1us of threshold range 0-5A.
In practical applications, the switching tube current comparing module in above-mentioned drive control can be by multiple comparison circuit groups
At, can also be made of modulus conversion chip and microprocessor such as DSP or single-chip microcontroller etc., when switching tube current comparing module by
When modulus conversion chip (A/D chip) and microprocessor such as DSP or single-chip microcontroller etc. form, it can be incited somebody to action by modulus conversion chip
The switch tube current of acquisition is converted into digital signal, then by the digital signal after conversion be sent in microprocessor with it is preset
Multiple current threshold ranges are compared, and then, send switching speed selecting module for comparison result, and then pass through switch speed
It spends selecting module and selects switching speed, switching speed selecting module can be realized by analog circuit, can also pass through micro- place
It manages device such as DSP or single-chip microcontroller generates.
The above method in the embodiment of the present invention executes step S103, namely: institute is driven according to the target switch speed
State the switch of switching tube.Referring to FIG. 5, above-mentioned steps S103 can also be implemented in the following way in practical application:
Step S301: acquisition is used to indicate the pulse width modulation (PWM) signal that the switching tube is switched on or off；
Step S302: according to the pwm signal and the target switch speed, opening or closing for the switching tube is driven
It is disconnected.
In practical applications, it can be set and be used to indicate the pulse width modulation (PWM) letter that the switching tube is switched on or off
Number, for example, when pwm signal is high level, it is open-minded to indicate that switching tube waits for for setting, and when pwm signal is low level, instruction switch
Pipe is wait turn off；Also it can be set when pwm signal is low level, it is open-minded to indicate that switching tube waits for, when pwm signal is high level,
Instruction switching tube waits turning off.
Here, it is open-minded to indicate that switching tube waits for be arranged when pwm signal is high level, when pwm signal is low level,
For instruction switching tube waits turning off.As shown in above-mentioned Fig. 4 A-4B, drive control device get be used to indicate switching tube wait for it is open-minded
High level pwm signal when, drive control device can according to high level pwm signal and switching speed 2us, control driving electricity
Road driving switch pipe is open-minded.
Referring to FIG. 6, above-mentioned steps S302 can also be implemented in the following manner in switching tube when opening:
Step S401: the switching tube is indicated when opening in the pwm signal, the upper bridge arm obtained in driving circuit is opened
The first logical quantity, wherein first quantity and the target switch speeds match, the driving circuit includes multiple drive power
Branch, every level-one driving branch include the upper bridge arm for driving the switching tube to open, and the upper bridge arm of every level-one is opened with described
Close pipe connection；
Step S402: the open-minded of the upper bridge arm of the first quantity in the driving circuit is controlled, and then drives the switching tube
It is open-minded.
When drive control device gets the high level pwm signal for being used to indicate switching tube wait opening, drive control device is just
The switching tube driving control signal that driving switch pipe is opened can be generated according to high level pwm signal and switching speed 2us, and
The switching tube driving control signal of generation is sent to driving circuit, in practical applications, driving circuit includes multiple drive power branch
Road, every level-one driving branch include the upper bridge arm opened for driving switch pipe, and the upper bridge arm of every level-one all connects with switching tube
It connects, the upper bridge arm of every level-one can be made of triode, and certainly, the upper bridge arm of every level-one can also include resistance, wherein each
Triode in the upper bridge arm of grade can also be replaced by MOSFET (field effect transistor).
Fig. 7 A is the driving circuit for including level Four driving branch, the upper bridge arm in every level-one driving branch all by triode with
And resistance composition, every level-one drive the upper bridge arm in branch to connect with the grid of switching tube, certainly, electricity are driven shown in Fig. 7 A
Triode in road can also replace (as shown in Figure 7 B) by MOSFET, and driving circuit shown in Fig. 7 A can also set for others
Such as Fig. 7 C or Fig. 7 D are counted, in embodiments of the present invention, specifically shown in Fig. 7 A for driving circuit.
The driving that drive control device is generated according to high level pwm signal and switching speed 2us is received in driving circuit
After the switching tube driving control signal that switching tube is opened, so that it may control driving circuit according to the switching tube driving control signal
In N number of upper bridge arm corresponding with switching speed 2us be in opening state so that switching tube is open-minded with switching speed 2us.
Here, suppose that corresponding 3 upper bridge arms of switching speed 2us, it is possible to from driving circuit shown in Fig. 7 A optionally
Three upper bridge arms, and three upper bridge arms of control selections are in opening state, and then control switch pipe is opened with switching speed 2us
It is logical, for example, can control the upper bridge arm that the first order in driving circuit drives branch to third level driving branch, then, driving control
Device processed can generate one group 1110 of signal to driving circuit according to switching speed 2us, and driving circuit is according to this group 1110
Signal controls the open-minded of the upper bridge arm that the first order in driving circuit drives branch to the third level to drive branch.
Also can control the upper bridge arm of the driving branch of the first order in driving circuit, the upper bridge arm of third level driving branch and
The fourth stage drives the upper bridge arm of branch, then, drive control device can give according to the signal that switching speed 2us generates one group 1011
Driving circuit, driving circuit control the upper bridge arm of first order driving branch in driving circuit, the according to one group 1011 of the signal
The upper bridge arm and the fourth stage of three-level driving branch drive the open-minded of the upper bridge arm of branch, and then control switch pipe is with switching speed
2us is open-minded, is just not listed one by one herein.
Referring to FIG. 8, above-mentioned steps S302 can also be implemented in the following manner in switching tube when turning off:
Step S403: the switching tube is indicated when turning off in the pwm signal, the lower bridge arm obtained in driving circuit is opened
The second logical quantity, wherein second quantity and the target switch speeds match, the driving circuit includes multiple drive power
Branch, every level-one driving branch include the lower bridge arm for driving the switching tube shutdown, and the lower bridge arm of every level-one is opened with described
Close pipe connection；
Step S404: the shutdown of the lower bridge arm of the second quantity in the driving circuit is controlled, and then drives the switching tube
Shutdown.
When drive control device gets the low level pwm signal for being used to indicate switching tube wait turning off, drive control device is just
The switching tube driving control signal of driving switch pipe shutdown can be generated according to low level pwm signal and switching speed 1us, and
The switching tube driving control signal of generation is sent to driving circuit, likewise, driving circuit includes multiple drive power branch, it is each
Grade driving branch includes the lower bridge arm for the shutdown of driving switch pipe, and the lower bridge arm of every level-one is all connect with switching tube, each
The lower bridge arm of grade can be made of triode, and certainly, the lower bridge arm of every level-one can also include resistance, wherein under every level-one
Triode in bridge arm can also be replaced by MOSFET (field effect transistor).
Please continue to refer to Fig. 7 A, Fig. 7 A is the driving circuit for including level Four driving branch, under every level-one drives in branch
Bridge arm is all made of triode and resistance, and the lower bridge arm in every level-one driving branch is connect with the grid of switching tube, is being driven
Dynamic circuit receives drive control device according to low level pwm signal and switching speed 1us the driving switch pipe shutdown generated
After switching tube driving control signal, so that it may be controlled according to the switching tube driving control signal fast with switch in driving circuit
It is in an off state to spend the corresponding M lower bridge arm of 1us, so that switching tube is with switching speed 1us shutdown.
Here, suppose that corresponding 2 lower bridge arms of switching speed 1us, it is possible to appoint from driving circuit shown in Fig. 7 A
2 lower bridge arms are selected, and 2 lower bridge arms of control selections are in an off state, and then control switch pipe is with the pass switching speed 1us
It is disconnected, for example, can choose the lower bridge arm of first order driving branch and second level driving branch in control driving circuit, then,
Drive control device can generate one group 1100 of signal to driving circuit according to switching speed 1us, and driving circuit is according to this group
1100 signal controls the shutdown of the lower bridge arm of first order driving branch and second level driving branch in driving circuit.
Also it can choose the lower bridge arm of third level driving branch and the fourth stage in control driving circuit to drive under branch
Bridge arm, then, drive control device can generate one group 0011 of signal to driving circuit, driving circuit according to switching speed 1us
According to one group 0011 of the signal, controls the lower bridge arm of third level driving branch and the fourth stage in driving circuit and drive branch
The shutdown of lower bridge arm, and then control switch pipe is just not listed one by one herein with switching speed 1us shutdown.
So in the above method, by using the switch tube current for obtaining switching tube to be driven, the switch tube current
For the electric current of circuit where the switching tube；According to the corresponding relationship of preset switch tube current and switching speed, determining and institute
State the corresponding target switch speed of switch tube current, wherein switching speed is the speed that the switching tube is opened or is described open
Close the speed of pipe shutdown；Drive the technology of the switch of the switching tube according to the target switch speed, namely by obtain to
The switch tube current of the switching tube of driving, then, according to it is preset switch tube current and switching speed corresponding relationship, determine with
The corresponding target switch speed of the switch tube current of acquisition, then, according to the target switch S/CO pipe open or
Shutdown, thus it is possible to be opened guaranteeing the case where switch tube voltage spike is consistently less than License Value with the control of maximum switching speed
Being switched on or off for pipe is closed, so, there is the technical effect for the switching loss that can effectively reduce switching tube.
Based on the same inventive concept, it is provided in the embodiment of the present invention a kind of for reducing the dress of the switching loss of switching tube
It sets, the specific implementation of the method for the switching loss of the reduction switching tube of the device can be found in retouching for above method embodiment part
It states, overlaps will not be repeated, which includes:
Switching tube current sampling circuit, for obtaining the switch tube current of switching tube to be driven, the switch tube current
For the electric current of circuit where the switching tube；
Drive control device is connect with the switching tube current sampling circuit and driving circuit, the drive control respectively
Device is used to determine target corresponding with the switch tube current according to the corresponding relationship of preset switch tube current and switching speed
Switching speed, wherein switching speed is the speed that the switching tube is opened or is the speed that the switching tube turns off；
The driving circuit is connect with the switching tube, and the driving circuit is used to be driven according to the target switch speed
Move the switch of the switching tube.
Optionally, the driving circuit, is also used to:
Acquisition is used to indicate the pulse width modulation (PWM) signal that the switching tube is switched on or off；
According to the pwm signal and the target switch speed, being switched on or off for the switching tube is driven.
Optionally, the driving circuit, is also used to:
The switching tube is indicated when opening in the pwm signal, obtains the upper bridge arm in driving circuit is opened first
Quantity, wherein first quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, often
Level-one driving branch includes the upper bridge arm for driving the switching tube to open, and the upper bridge arm and the switching tube of every level-one connect
It connects；
The open-minded of the upper bridge arm of the first quantity in the driving circuit is controlled, and then drives the open-minded of the switching tube.
Optionally, the driving circuit, is also used to:
The switching tube is indicated when turning off in the pwm signal, obtains the lower bridge arm in driving circuit is opened second
Quantity, wherein second quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, often
Level-one driving branch includes the lower bridge arm for driving the switching tube shutdown, and the lower bridge arm of every level-one and the switching tube connect
It connects；
The shutdown of the lower bridge arm of the second quantity in the driving circuit is controlled, and then drives the shutdown of the switching tube.
Optionally, the drive control device, is also used to:
Obtain preset multiple current threshold ranges；
Determine the first current threshold range corresponding with the switch tube current；
Determine target switch speed corresponding with the first current threshold range, wherein switching speed and current threshold
Range maps one by one.
Switching tube current sampling circuit, for obtaining the switch tube current of switching tube to be driven, the switch tube current
For the electric current of circuit where the switching tube；
Drive control device is connect with the switching tube current sampling circuit and driving circuit, the drive control respectively
Device is used to determine target corresponding with the switch tube current according to the corresponding relationship of preset switch tube current and switching speed
Switching speed, wherein switching speed is the speed that the switching tube is opened or is the speed that the switching tube turns off；
The driving circuit is connect with the switching tube, and the driving circuit is used to be driven according to the target switch speed
Move the switch of the switching tube.
Optionally, the driving circuit, is also used to:
Acquisition is used to indicate the pulse width modulation (PWM) signal that the switching tube is switched on or off；
According to the pwm signal and the switching speed of determination, being switched on or off for the switching tube is driven.
Optionally, the driving circuit, is also used to:
The switching tube is indicated when opening in the pwm signal, obtains the upper bridge arm in driving circuit is opened first
Quantity, wherein first quantity is matched with the switching speed of the determination, and the driving circuit is for driving the switching tube
It is open-minded, the driving circuit includes multiple drive power branch, and every level-one driving branch includes for driving the switching tube open-minded
Upper bridge arm circuit and lower bridge arm for driving switching tube shutdown, the upper bridge arm and the switching tube of every level-one
's；
The open-minded of the upper bridge arm of the first quantity in the driving circuit is controlled, and then drives the open-minded of the switching tube.
Optionally, the driving circuit, is also used to:
The switching tube is indicated when turning off in the pwm signal, obtains the lower bridge arm in driving circuit is opened second
Quantity, wherein second quantity is matched with the switching speed of the determination, and the driving circuit includes multiple drive power branch,
Every level-one driving branch includes the lower bridge arm for driving the switching tube shutdown, the lower bridge arm of every level-one and the switching tube
Connection；
The shutdown of the lower bridge arm of the second quantity in the driving circuit is controlled, and then drives the shutdown of the switching tube.
Optionally, the drive control device, is also used to:
Obtain preset multiple current threshold ranges；
Determine the first current threshold range corresponding with the switch tube current；
Determine switching speed corresponding with the first current threshold range, wherein switching speed and current threshold range
It maps one by one.
Based on the same inventive concept, a kind of computer installation is provided in the embodiment of the present invention, described device includes processing
Device, the processor realize a kind of reduction switching tube as described above when being used to execute the computer program stored in memory
The step of method of switching loss.
Based on the same inventive concept, it the embodiment of the invention provides a kind of computer readable storage medium, is stored thereon with
Computer program realizes a kind of switching loss for reducing switching tube as described above when the computer program is executed by processor
Method the step of.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of method for the switching loss for reducing switching tube characterized by comprising
The switch tube current of switching tube to be driven is obtained, the switch tube current is the electric current of circuit where the switching tube；
According to the corresponding relationship of preset switch tube current and switching speed, determine that target corresponding with the switch tube current is opened
Close speed, wherein switching speed is the speed that the switching tube is opened or is the speed that the switching tube turns off；
The switch of the switching tube is driven according to the target switch speed.
2. the method as described in claim 1, which is characterized in that described to drive the switching tube according to the target switch speed
Switch, comprising:
Acquisition is used to indicate the pulse width modulation (PWM) signal that the switching tube is switched on or off；
According to the pwm signal and the target switch speed, being switched on or off for the switching tube is driven.
3. method according to claim 2, which is characterized in that according to the pwm signal and the target switch speed, drive
Move the open-minded of the switching tube, comprising:
The switching tube is indicated when opening in the pwm signal, obtains the first quantity that the upper bridge arm in driving circuit is opened,
Wherein, first quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, and every level-one is driven
Dynamic branch includes the upper bridge arm for driving the switching tube to open, and the upper bridge arm of every level-one is connect with the switching tube；
The open-minded of the upper bridge arm of the first quantity in the driving circuit is controlled, and then drives the open-minded of the switching tube.
4. method according to claim 2, which is characterized in that according to the pwm signal and the target switch speed, drive
Move the shutdown of the switching tube, comprising:
The switching tube is indicated when turning off in the pwm signal, obtains the second quantity that the lower bridge arm in driving circuit is opened,
Wherein, second quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, and every level-one is driven
Dynamic branch includes the lower bridge arm for driving the switching tube shutdown, and the lower bridge arm of every level-one is connect with the switching tube；
The shutdown of the lower bridge arm of the second quantity in the driving circuit is controlled, and then drives the shutdown of the switching tube.
5. such as method of any of claims 1-4, which is characterized in that it is described according to preset switch tube current with open
The corresponding relationship of speed is closed, determines target switch speed corresponding with the switch tube current, comprising:
Obtain preset multiple current threshold ranges；
Determine the first current threshold range corresponding with the switch tube current；
Determine target switch speed corresponding with the first current threshold range, wherein switching speed and current threshold range
It maps one by one.
6. a kind of for reducing the device of the switching loss of switching tube characterized by comprising
Switching tube current sampling circuit, for obtaining the switch tube current of switching tube to be driven, the switch tube current is institute
The electric current of circuit where stating switching tube；
Drive control device is connect with the switching tube current sampling circuit and driving circuit respectively, and the drive control device is used
In the corresponding relationship according to preset switch tube current and switching speed, target switch corresponding with the switch tube current is determined
Speed, wherein switching speed is the speed that the switching tube is opened or is the speed that the switching tube turns off；
The driving circuit is connect with the switching tube, and the driving circuit is used to drive institute according to the target switch speed
State the switch of switching tube.
7. device as claimed in claim 6, which is characterized in that the driving circuit is also used to:
Acquisition is used to indicate the pulse width modulation (PWM) signal that the switching tube is switched on or off；
According to the pwm signal and the target switch speed, being switched on or off for the switching tube is driven.
8. device as claimed in claim 7, which is characterized in that the driving circuit is also used to:
The switching tube is indicated when opening in the pwm signal, obtains the first quantity that the upper bridge arm in driving circuit is opened,
Wherein, first quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, and every level-one is driven
Dynamic branch includes the upper bridge arm for driving the switching tube to open, and the upper bridge arm of every level-one is connect with the switching tube；
The open-minded of the upper bridge arm of the first quantity in the driving circuit is controlled, and then drives the open-minded of the switching tube.
9. device as claimed in claim 7, which is characterized in that the driving circuit is also used to:
The switching tube is indicated when turning off in the pwm signal, obtains the second quantity that the lower bridge arm in driving circuit is opened,
Wherein, second quantity and the target switch speeds match, the driving circuit includes multiple drive power branch, and every level-one is driven
Dynamic branch includes the lower bridge arm for driving the switching tube shutdown, and the lower bridge arm of every level-one is connect with the switching tube；
The shutdown of the lower bridge arm of the second quantity in the driving circuit is controlled, and then drives the shutdown of the switching tube.
10. the device as described in any one of claim 6-9, which is characterized in that the drive control device is also used to:
Obtain preset multiple current threshold ranges；
Determine the first current threshold range corresponding with the switch tube current；
Determine target switch speed corresponding with the first current threshold range, wherein switching speed and current threshold range
It maps one by one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711396677.1A CN109951058A (en) | 2017-12-21 | 2017-12-21 | A kind of method and device for the switching loss reducing switching tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711396677.1A CN109951058A (en) | 2017-12-21 | 2017-12-21 | A kind of method and device for the switching loss reducing switching tube |
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| CN109951058A true CN109951058A (en) | 2019-06-28 |
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| CN201711396677.1A Pending CN109951058A (en) | 2017-12-21 | 2017-12-21 | A kind of method and device for the switching loss reducing switching tube |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803723A (en) * | 2021-01-04 | 2021-05-14 | 阳光电源股份有限公司 | Inverter control method, switching tube driving circuit, controller and inverter |
| CN114142713A (en) * | 2020-10-12 | 2022-03-04 | 上海富芮坤微电子有限公司 | Control device and control method for switching tube of switching power supply |
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| CN114142713B (en) * | 2020-10-12 | 2023-09-12 | 上海富芮坤微电子有限公司 | Control device and control method for switching power supply switching tube |
| CN112803723A (en) * | 2021-01-04 | 2021-05-14 | 阳光电源股份有限公司 | Inverter control method, switching tube driving circuit, controller and inverter |
| CN112803723B (en) * | 2021-01-04 | 2022-07-12 | 阳光电源股份有限公司 | Inverter control method, switching tube driving circuit, controller and inverter |
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Application publication date: 20190628 |