CN208508784U - Half-bridge drive circuit, chip and air-conditioning - Google Patents
Half-bridge drive circuit, chip and air-conditioning Download PDFInfo
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- CN208508784U CN208508784U CN201821083686.5U CN201821083686U CN208508784U CN 208508784 U CN208508784 U CN 208508784U CN 201821083686 U CN201821083686 U CN 201821083686U CN 208508784 U CN208508784 U CN 208508784U
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Abstract
This application involves a kind of half-bridge drive circuit, chip and air-conditionings, including Switching Power Supply, main control device, at least two drive control apparatus and the driving switch being connected with each drive control apparatus；Driving switch includes upper bridge driving switch and lower bridge driving switch；Switching Power Supply and main control device are connected with drive control apparatus；First output end of drive control apparatus is connected with upper bridge driving switch, and the second output terminal of drive control apparatus is connected with lower bridge driving switch；Main control device exports the initial driving signal of the complementation of two-way corresponding to each drive control apparatus；Drive control apparatus follows any initial driving signal, exports complementary first object driving signal and the second target drives signal；First output end exports first object driving signal, and second output terminal exports the second target drives signal.In the case where being not provided with negative pressure power supply, the negative pressure shutdown for needing to turn off bridge arm is realized.Using the technical solution of the application, design cost and difficulty can reduce.
Description
Technical field
This application involves half-bridge drive circuit technical fields, and in particular to a kind of half-bridge drive circuit, chip and air-conditioning.
Background technique
Power electronics has pushed all kinds of switch pipe driving chips to rapidly develop in the extensive utilization of appliance field.Related skill
Many half-bridge drive circuits are all integrated with isolation drive mode and negative pressure turn-off function in art, so that switch on the bridge pipe drives
It is realized to good, negative pressure shutdown can be achieved in upper and lower bridge.But such integrated form isolation drive chip requires opening for driving circuit
Powered-down source power supply system contain the mutually isolated power supply of multichannel 15V and multichannel -9V realize isolation drive and negative pressure shutdown,
So that the design difficulty of half-bridge drive circuit is larger.
Utility model content
The application provides a kind of half-bridge drive circuit, chip and air-conditioning, to solve half-bridge drive circuit in the related technology
The larger problem of design difficulty.
According to the embodiment of the present application in a first aspect, provide a kind of half-bridge drive circuit, including Switching Power Supply, master control are set
Standby, at least two drive control apparatus and the driving switch being connected with each drive control apparatus；
The driving switch includes upper bridge driving switch and lower bridge driving switch；
The Switching Power Supply and the main control device are connected with the drive control apparatus；
First output end of the drive control apparatus is connected with the upper bridge driving switch, the drive control apparatus
Second output terminal is connected with the lower bridge driving switch；
The main control device exports the initial driving signal of two-way complementation corresponding to each drive control apparatus；
The drive control apparatus follows any initial driving signal, export complementary first object driving signal and
Second target drives signal；
First output end exports the first object driving signal, and the second output terminal exports second target
Driving signal.
Further, in half-bridge drive circuit described above, the drive control apparatus includes that secondary chip and first become
Depressor；
First transformer includes the first armature winding, the first secondary windings and second subprime winding；
The Switching Power Supply, the main control device and first armature winding are connected with the secondary chip；
First secondary windings is connected with the upper bridge driving switch, and the second subprime winding and the lower bridge drive
Switch is connected, and the Same Name of Ends of first secondary windings and the second subprime winding is opposite.
Further, half-bridge drive circuit described above further includes first capacitor device,
The first capacitor device is serially connected on the circuit that first armature winding and the secondary chip are formed.
Further, half-bridge drive circuit described above further includes resistance；
The resistance is serially connected on the circuit that first armature winding and the secondary chip are formed.
Further, in half-bridge drive circuit described above, the pair chip is driving enhancing cake core.
Further, in half-bridge drive circuit described above, the Switching Power Supply includes control switch, the second transformer
And diode；
Second transformer includes external power source interface, the second armature winding and third secondary windings；
The control switch concatenates the circuit to be formed with second armature winding and is connected with the external power source interface；
The third secondary windings is connected with the circuit that the Diode series are formed with each secondary chip.
Further, in half-bridge drive circuit described above, the ground terminal of each drive control apparatus
It is both connected to together.
Further, half-bridge drive circuit described above, if being applied in frequency converter, in the half-bridge drive circuit
The number of the drive control apparatus is 3；
Accordingly, the drive control switch is 3.
Further, in half-bridge drive circuit described above, the main control device is master chip, the master chip output
The initial driving signal of the two-way complementation；Alternatively,
The main control device includes master chip and auxiliary element, and the master chip exports signal to be processed all the way, by institute
It states auxiliary element to carry out branch process to the signal to be processed and negate processing, obtains the initial driving of the two-way complementation
Signal.
According to the second aspect of the embodiment of the present application, provide a kind of half-bridge driven chip, half bridge chip be provided with as
The upper half-bridge drive circuit.
According to the third aspect of the embodiment of the present application, a kind of air-conditioning is provided, the air-conditioning is provided with half-bridge as described above
Driving chip.
It is right to export each drive control apparatus institute by main control device for half-bridge drive circuit, chip and the air-conditioning of the application
The initial driving signal for the two-way complementation answered；To realize that complementary drive or more bridge is switched on or off, meanwhile, by drive control apparatus
Any initial driving signal is followed, complementary first object driving signal and the second target drives signal are exported；By the first output
End output first object driving signal acts on bridge driving switch, and second output terminal exports the second target drives signal function and exists
Lower bridge driving switch realizes the negative pressure shutdown for needing to turn off bridge arm in the case where being not provided with negative pressure power supply.Using this
The technical solution of application, can reduce design difficulty.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Fig. 1 is the schematic diagram of the half-bridge drive circuit of the prior art；
Fig. 2 is the schematic diagram of the half-bridge drive circuit of the application.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the application.
Fig. 1 is the schematic diagram of the half-bridge drive circuit of the prior art, as shown in Figure 1, the present embodiment is with three driving switch
For, it is turned off to the isolation drive and negative pressure for realizing three half-bridges, needs to build 4 road power supplies, every road power supply
In including 15V positive pressure power supply and -9V negative pressure power supply.Wherein, the upper bridge driving switch in each driving switch
Q1 uses individually power supply all the way, and the lower bridge driving switch Q2 in each driving switch shares power supply all the way, on
The first positive electricity source pin Vcc1 of the corresponding power supply of bridge driving switch Q1 and driving chip U1, driving chip U1 it is first negative
Power pins Vee1 is connected with the first grounding pin gnd1 of driving chip U1, and the corresponding power supply of lower bridge driving switch Q2 drives
The second of the second positive electricity source pin Vcc2 of dynamic chip U1, the second negative electricity source pin Vee2 and driving chip U1 of driving chip U1
Grounding pin gnd2 is connected, and upper bridge driving switch Q1 connects with the first driving pin driver1 and first of driving chip U1 respectively
Ground pin gnd1 is connected, and lower bridge driving switch Q2 drives the ground connection of pin driver2 and second with the second of driving chip U1 respectively
Pin gnd2 is connected.
Driving chip U1 from corresponding power supply obtain it is electric after, then export corresponding driving signal respectively, bridge drives in driving
The on or off of dynamic switch Q1, and, drive the on or off of lower bridge driving switch Q2.In addition, in order to realize that negative pressure is closed
It is disconnected, it needs additionally to increase the devices such as voltage-stabiliser tube, load resistance to build negative pressure power supply, to meet the confession of half-bridge drive circuit
Electricity demanding, so that design cost is higher, difficulty is larger.Therefore, in order to solve the above-mentioned technical problem, this application provides following skills
Art scheme.
Fig. 2 is the schematic diagram of the half-bridge drive circuit of the application, as shown in Fig. 2, the half-bridge drive circuit of the present embodiment can
To include Switching Power Supply 10, main control device 11, at least two drive control apparatus 12 and be connected with each drive control apparatus 12
Driving switch.Wherein, driving switch includes upper bridge driving switch Q1 and lower bridge driving switch Q2；Switching Power Supply 10 and master control are set
Standby 11 are connected with drive control apparatus 12；First output end of drive control apparatus 12 is connected with upper bridge driving switch Q1, drives
The second output terminal of dynamic control equipment 12 is connected with lower bridge driving switch Q2.
During a specific implementation, corresponding program can be pre-set in main control device 11, so that master control is set
Standby 11 can export the initial driving signal of two-way complementation corresponding to each drive control apparatus 12.In the present embodiment, master control
Equipment 11 can export the initial driving signal of two-way complementation corresponding to each drive control apparatus 12, for example, main control device
11 can be master chip, by the initial driving signal of master chip output two-way complementation, and be sent to each drive control apparatus 12.
In addition, main control device 11 can also include master chip and auxiliary element, driving signal to be processed all the way is can be generated in master chip,
And in such a way that auxiliary element carries out branch process and negates processing, obtain two corresponding to each drive control apparatus 12
The initial driving signal of road complementation, the present embodiment are not particularly limited.
Wherein, the initial signal of two-way complementation can be defined as the first driving signal and the second driving letter in the present embodiment
Number, i.e., when between the first driving signal and the second driving signal one be in high level when, another is needed in low level.Its
In, the first driving signal and the second driving signal are both preferably pulse width modulation (Pulse Width Modulation, PWM)
Signal.Drive control apparatus 12 follows any initial driving signal, exports complementary first object driving signal and the second target
Driving signal；First output end exports first object driving signal, and bridge driving switch Q1 conducting or shutdown in driving, second is defeated
Outlet exports the second target drives signal and drives lower bridge driving switch Q2 conducting or shutdown.
For example, the present embodiment drives upper bridge driving switch to be connected with the first driving signal, the second driving signal drives lower bridge
For driving switch Q2 conducting, the technical solution of the application is illustrated.Drive control apparatus 12 follows the first driving signal
Third driving signal identical with the first driving signal phase is exported as first object driving signal, and, output and first
The fourth drive signal of driving signal opposite in phase is as the second target drives signal, the upward bridge driving switch Q1 of the first output end
Third driving signal is exported, to drive upper bridge driving switch Q1 conducting, the downward bridge driving switch Q2 output the 4th of second output terminal
Driving signal, to drive lower bridge driving switch Q2 shutdown.In this way, no setting is required negative pressure power supply, can be realized lower bridge driving
The negative pressure shutdown opened.Alternatively, drive control apparatus 12 follows the output of the second driving signal identical with the second driving signal phase
5th driving signal as the second target drives signal, and, output is believed with the 6th of the second driving signal opposite in phase driving
Number be used as first object driving signal；The upward bridge driving switch Q1 of first output end exports the 6th driving signal, to drive upper bridge
Driving switch Q1 shutdown, the downward bridge driving switch Q2 of second output terminal export the 5th driving signal, to drive lower bridge driving switch
Q2 conducting.In this way, no setting is required in the present embodiment negative pressure power supply, can be realized the negative pressure shutdown that bridge driving is opened.
In the present embodiment, the ground terminal of each drive control apparatus 12 be can connect together, such Switching Power Supply
10 only need to provide the on or off that upper and lower bridge can be realized in 15V positive pressure power supply all the way.And since drive control apparatus is defeated
Negative pressure power supply electricity is separately provided so that no longer setting in two complementary first object driving signals and the second target drives signal out
Source, can be realized the on, off of non-isolated driving or more bridge, and can synchronize and realize that the negative pressure for needing to turn off bridge arm is closed
It is disconnected.
The half-bridge drive circuit of the present embodiment exports two-way corresponding to each drive control apparatus by main control device 11
Complementary initial driving signal；To realize that complementary drive or more bridge is switched on or off, meanwhile, it is followed and is appointed by drive control apparatus 12
One initial driving signal exports complementary first object driving signal and the second target drives signal；It is exported by the first output end
First object driving signal acts on bridge driving switch Q1, and second output terminal exports the second target drives signal function in Xia Qiao
Driving switch Q2 realizes the negative pressure shutdown for needing to turn off bridge arm in the case where being not provided with negative pressure power supply.Using this Shen
Technical solution please, can reduce design cost and difficulty.
During a specific implementation, as shown in Fig. 2, drive control apparatus 12 may include secondary core in the present embodiment
Piece U2 and the first transformer T1；Wherein, the first transformer T1 include the first armature winding, the first secondary windings and second subprime around
Group；Switching Power Supply 10, main control device 11 and the first armature winding are connected with secondary chip U2；First secondary windings and upper bridge drive
Switch Q1 is connected, and second subprime winding is connected with lower bridge driving switch Q2, and the first secondary windings and second subprime winding is same
Name end is opposite.In the present embodiment, the first transformer T1 is preferably pulse transformer.Wherein, the output end difference of Switching Power Supply 10
It is connected with the power pins Vcc of secondary chip U2 and grounding pin gnd, to provide power supply to secondary chip U2.
For example, as shown in Fig. 2, the present embodiment for applying half-bridge drive circuit in frequency converter, to the application's
Technical solution is described, and can specifically include 3 drive control apparatus 12, may include 3 drive controls accordingly
Switch.Main control device 11 issues level magnitude and lesser first driving signal of driving current and the second driving signal, send to
After the input pin IN1 and IN2 of secondary chip U2, the first driving signal and the second driving signal are enhanced by secondary chip U2,
The driving signal that amplitude increases many hundreds times close to 15V supply voltage, driving current is obtained, is then drawn by the output of secondary chip U2
Foot outA and output pin outB output, due to complementary between the first driving signal and the second driving signal, and centre is equipped with
Certain dead time, so output pin outA shows as AC signal to the voltage of output pin outB, this exchange letter
After number being added in the first armature winding of the first transformer T1, so that the first secondary windings and second subprime winding of transformer follow
The AC signal of the first armature winding of first transformer T1 exports, but due to the first secondary windings and second subprime winding
Same Name of Ends is on the contrary, phase is necessarily phase between the signal that the signal for exporting the first secondary windings is exported with second subprime winding
Anti-, therefore, when upper bridge driving switch Q1 is connected, lower bridge driving switch Q2 is necessarily turned off, alternatively, lower bridge driving switch Q2 is connected
When, upper bridge driving switch Q1 is necessarily turned off.
In practical applications, the frequency of the driving signal issued due to main control device 11 is fixed, but its duty ratio is
It adjusting in real time again always, i.e. service time and turn-off time is not perfect symmetry, so as shown in Fig. 2, in the present embodiment,
Need the first capacitor device C1 that connects on the first armature winding of the first transformer T1, that is, first capacitor device C1 is serially connected in first
On the circuit that armature winding and pair chip U2 are formed, it can prevent transformer from magnetic deflection occur in this way, avoid the magnetic core of transformer
The driving to driving switch is influenced after saturation.Meanwhile the parameters such as the turn ratio, leakage inductance, inductance, magnetic core size of transformer are also required to tie
The output level amplitude etc. for closing specific switching frequency, maximum duty cycle, minimum duty cycle, driving chip is designed, and is just arrived
It is exported up to reliable half-bridge driven signal, realizes low cost, the simple half-bridge driven of power reguirements.
For example, for 2500W three phase inverter bridge (switching frequency 5KHZ, maximum duty cycle 90%, minimum duty cycle 10%,
For transformer of the driving chip output level amplitude for 15V), parameter can refer to following records: transformer name: high frequency
Transformer EE16-6P, the turn ratio :/28 circle of 28 circle, i.e. 1:1, leakage inductance: 10uH (max), inductance: 600uH (min), magnetic core size rule
Lattice: EE16.
Since the electric current of secondary chip U2 output is bigger, the first transformer T1 damage may cause, therefore, as shown in Fig. 2,
The half-bridge drive circuit of the present embodiment further includes resistance R, and resistance R is serially connected in time that the first armature winding and pair chip U2 are formed
On the road, to limit the size of current for flowing into the first transformer T1.Wherein, the resistance value of resistance R is preferably 10 Ω.
As shown in Fig. 2, Switching Power Supply 10 may include control switch Q3, second in the half-bridge drive circuit of the present embodiment
Transformer T2 and diode D；Wherein, the second transformer T2 include external power source interface, the second armature winding and third secondary around
Group；Control switch Q3 concatenates the circuit to be formed with the second armature winding and is connected with external power source interface；Third secondary windings and two
The circuit to be formed of connecting pole pipe D is connected with each pair chip U2.After control switch Q3 conducting, the alternating current of input is through the second transformation
After device T2 carries out transformation, direct current is rectified by diode D, and be powered to each pair chip U2.
As shown in Fig. 2, the Switching Power Supply 10 in this implementation further includes the second capacitor C2 and third capacitor C3.Wherein,
The third secondary windings circuit to be formed of connecting with diode D is in parallel with the second capacitor C2.Control switch Q3 and second it is primary around
The circuit that group concatenation is formed is in parallel with third capacitor C3.
The application also provides a kind of half-bridge driven chip, which is provided with the half-bridge driven electricity of above-described embodiment
Road.
The application also provides a kind of air-conditioning, which is provided with the half-bridge driven chip of above-described embodiment.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
It should be noted that term " first ", " second " etc. are used for description purposes only in the description of the present application, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present application, unless otherwise indicated, the meaning of " multiple "
Refer at least two.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the application.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although embodiments herein has been shown and described above, it is to be understood that above-described embodiment is example
Property, it should not be understood as the limitation to the application, those skilled in the art within the scope of application can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (11)
1. a kind of half-bridge drive circuit, which is characterized in that including Switching Power Supply, main control device, at least two drive control apparatus
The driving switch being connected with each drive control apparatus；
The driving switch includes upper bridge driving switch and lower bridge driving switch；
The Switching Power Supply and the main control device are connected with the drive control apparatus；
First output end of the drive control apparatus is connected with the upper bridge driving switch, and the second of the drive control apparatus
Output end is connected with the lower bridge driving switch；
The main control device exports the initial driving signal of two-way complementation corresponding to each drive control apparatus；
The drive control apparatus follows any initial driving signal, exports complementary first object driving signal and second
Target drives signal；
First output end exports the first object driving signal, and the second output terminal exports second target drives
Signal.
2. half-bridge drive circuit according to claim 1, which is characterized in that the drive control apparatus include secondary chip and
First transformer；
First transformer includes the first armature winding, the first secondary windings and second subprime winding；
The Switching Power Supply, the main control device and first armature winding are connected with the secondary chip；
First secondary windings is connected with the upper bridge driving switch, the second subprime winding and the lower bridge driving switch
It is connected, and the Same Name of Ends of first secondary windings and the second subprime winding is opposite.
3. half-bridge drive circuit according to claim 2, which is characterized in that further include first capacitor device；
The first capacitor device is serially connected on the circuit that first armature winding and the secondary chip are formed.
4. half-bridge drive circuit according to claim 2, which is characterized in that further include resistance；
The resistance is serially connected on the circuit that first armature winding and the secondary chip are formed.
5. half-bridge drive circuit according to claim 2, which is characterized in that the pair chip is driving enhancing cake core.
6. the half-bridge drive circuit according to claim 2, which is characterized in that the Switching Power Supply include control switch,
Second transformer and diode；
Second transformer includes external power source interface, the second armature winding and third secondary windings；
The control switch concatenates the circuit to be formed with second armature winding and is connected with the external power source interface；
The third secondary windings is connected with the circuit that the Diode series are formed with each secondary chip.
7. half-bridge drive circuit according to claim 1, which is characterized in that the ground terminal of each drive control apparatus
Son is both connected to together.
8. half-bridge drive circuit according to claim 1, which is characterized in that if being applied in frequency converter, the half-bridge is driven
The number of the drive control apparatus in dynamic circuit is 3；
Accordingly, the drive control switch is 3.
9. -8 any half-bridge drive circuit according to claim 1, which is characterized in that the main control device is master chip,
The master chip exports the initial driving signal of the two-way complementation；Alternatively,
The main control device includes master chip and auxiliary element, and the master chip exports signal to be processed all the way, by described auxiliary
It helps component to carry out branch process to the signal to be processed and negate processing, obtains the initial driving letter of the two-way complementation
Number.
10. a kind of half-bridge driven chip, which is characterized in that half bridge chip is provided with as described in claim any one of 1-8
Half-bridge drive circuit.
11. a kind of air-conditioning, which is characterized in that the air-conditioning is provided with half-bridge driven chip as claimed in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821083686.5U CN208508784U (en) | 2018-07-09 | 2018-07-09 | Half-bridge drive circuit, chip and air-conditioning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821083686.5U CN208508784U (en) | 2018-07-09 | 2018-07-09 | Half-bridge drive circuit, chip and air-conditioning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667281A (en) * | 2018-07-09 | 2018-10-16 | 珠海格力电器股份有限公司 | Half-bridge drive circuit, chip and air-conditioning |
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2018
- 2018-07-09 CN CN201821083686.5U patent/CN208508784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667281A (en) * | 2018-07-09 | 2018-10-16 | 珠海格力电器股份有限公司 | Half-bridge drive circuit, chip and air-conditioning |
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