CN106602896A - Totem pole bridgeless circuit and system thereof - Google Patents
Totem pole bridgeless circuit and system thereof Download PDFInfo
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- CN106602896A CN106602896A CN201611159938.3A CN201611159938A CN106602896A CN 106602896 A CN106602896 A CN 106602896A CN 201611159938 A CN201611159938 A CN 201611159938A CN 106602896 A CN106602896 A CN 106602896A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention relates to the technical field of current sampling, and especially relates to a totem pole bridgeless circuit and a totem pole bridgeless circuit system. The totem pole bridgeless circuit comprises a first current transformer circuit, a second current transformer circuit, and a sampling resistor. The first current transformer circuit is connected between a first parallel connection point and a second series connection point. The second current transformer circuit is connected between a second parallel connection point and the second series connection point. In the positive half cycle of alternating current, when a second switching tube is switched on and a first switching tube is switched off, the second current transformer circuit collects a first current flowing through the second switching tube. During work in the negative half cycle of alternating current, when the second switching tube is switched off and the first switching tube is switched on, the first current transformer circuit collects a second current flowing through the first switching tube. Therefore, the current can be collected without a large and expensive Hall sensor, and the cost and size of products are reduced.
Description
Technical field
The present invention relates to current sampling technique field, more particularly to a kind of totem pole is without bridge circuit and totem pole without bridge electricity
Road system.
Background technology
In energy conversion system, the conversion efficiency of power supply is very important.Broad stopband power semiconductor, such as gallium nitride
(GaN) quality for and carborundum (SiC), being lifted due to its outstanding switching characteristic and constantly, has gradually been obtained in the recent period electric power and has been turned
Change the favor of application.Have benefited from the advantage of gallium nitride and carborundum, totem pole is without bridge (Totem-Pole Bridgeless) circuit
As the one kind without bridge circuit, there is circuit structure simply and high conversion efficiency, be increasingly subject to universal in recent years
Application.
In totem pole is without bridge circuit, main challenge is the sampling to inductive current so as to realize switch tube
Control sequential, so as to realize the functions such as PFC.As shown in figure 1, traditional sample mode is by hall sensing
Device is directly sampled inductive current, and the inductive current for collecting is transferred to into control unit.But, Hall element volume
Greatly, it is expensive, cause volume of the totem pole without bridge circuit excessive and make its range of application made.
The content of the invention
Embodiment of the present invention purpose aims to provide a kind of totem pole without bridge circuit and totem-pole bridgeless circuit system, its solution
Existing totem pole without bridge circuit has the excessive technical problem of volume.
To solve above-mentioned technical problem, the embodiment of the present invention provides technical scheme below：
In a first aspect, a kind of totem pole of embodiment of the present invention offer is connected in parallel without bridge circuit including being parallel to first
Point and second be connected in parallel a little between the first bridge arm unit and the second bridge arm unit, first bridge arm unit includes going here and there in the same direction
The first switch pipe and second switch pipe of connection, the junction point between the first switch pipe and second switch pipe is that the first series connection connects
Contact, first diode and the second diode of second bridge arm unit including series aiding connection, first diode and the
Junction point between two diodes is connected in series a little for second, described first be connected in parallel a little and second be connected in parallel a little between also
For shunt load unit, described first be connected in series a little and second be connected in series a little between be additionally operable to connect power supply and inductance,
The power supply and inductance are connected, and the totem pole also includes the first current transformer circuit, the second current transformer without bridge circuit
Circuit and sampling resistor；First current transformer circuit is connected to described first and is connected in parallel and a little connects with the described first series connection
Between contact, and connect with the first switch pipe；Second current transformer circuit is connected to second parallel connection even
Contact and described first be connected in series a little between, and with the second switch pipe series connection；First current transformer circuit
Outfan and the outfan of the second current transformer circuit share the first junction point, one end of the sampling resistor and described the
One junction point connects, other end ground connection；When positive half cycle of the power work in alternating current, the first current transformer electricity
Electric current of the road not to flowing through the inductance is sampled, and is disconnected in second switch pipe closure and the first switch pipe
When, second current transformer circuit is used for collection and flows through the first electric current of the second switch pipe, and makes after collection
Electric current flows through the sampling resistor；When negative half period of the power work in alternating current, second current transformer circuit
The electric current to flowing through the inductance is not sampled, and is disconnected and first switch pipe closure in the second switch pipe
When, first current transformer circuit is used for collection and flows through the second electric current of the first switch pipe, and makes after collection
Electric current flows through the sampling resistor.
Alternatively, the totem pole also includes the 3rd current transformer circuit without bridge circuit, and it is connected to described first simultaneously
Connection junction point and second be connected in parallel a little between, the outfan of the 3rd current transformer circuit shares described first and connects
Point；When the power work is in the positive half cycle of alternating current, the second switch pipe disconnects, when the first switch pipe is closed, or
Person, when the power work is in the negative half period of alternating current, the second switch pipe is closed, when the first switch pipe disconnects, institute
State the 3rd current transformer circuit for collection flow through the electric current of the load unit, and make described in the electric current after collection flows through
Sampling resistor.
Alternatively, first current transformer circuit includes the first current transformer, the first reset resistor, the three or two pole
Pipe and the first sampling switch；First sampling switch includes first input end, the first outfan and the first control end；Described
One current transformer includes the first primary side winding and the first vice-side winding, and it is in parallel that first primary side winding is connected to described first
Junction point and first be connected in series a little between, one end of first vice-side winding respectively with one end of first reset resistor
Connect with the positive pole of first diode, the other end ground connection of first reset resistor, the negative pole of the 3rd diode
Connect with the first input end of first sampling switch, the first outfan of first sampling switch is the described first connection
Point, first control end is used to be input into the first control signal；When positive half cycle of the power work in alternating current, described
One control signal controls first sampling switch and is off；When negative half period of the power work in alternating current,
First control signal controls first sampling switch and is in closure state.
Alternatively, second current transformer circuit includes the second current transformer, the second reset resistor, the four or two pole
Pipe and the second sampling switch；Second sampling switch includes the second input, the second outfan and the second control end；Described
Two current transformers include the second primary side winding and the second vice-side winding, and it is in parallel that second primary side winding is connected to described second
Junction point and first be connected in series a little between, one end of second vice-side winding respectively with one end of second reset resistor
Connect with the positive pole of the 4th diode, the other end ground connection of second reset resistor, the negative pole of the 4th diode
Connect with the second input of second sampling switch, the second outfan of second sampling switch is the described first connection
Point, second control end is used to be input into the second control signal；When positive half cycle of the power work in alternating current, described
Two control signals control second sampling switch and are in closure state；When negative half period of the power work in alternating current,
Second control signal controls second sampling switch and is off.
Alternatively, first current transformer circuit includes the 3rd current transformer, the 3rd reset resistor, the five or two pole
Pipe and the 3rd sampling switch；3rd sampling switch includes the 3rd input, the 3rd outfan and the 3rd control end；Described
Three current transformers include the 3rd primary side winding and the 3rd vice-side winding, and it is in parallel that the 3rd primary side winding is connected to described first
Junction point and first be connected in series a little between, one end of the 3rd vice-side winding is respectively with the one of the 3rd reset resistor
The 3rd input connection of end, the positive pole of the 5th diode and the 3rd sampling switch, the 3rd reset resistor
The other end is grounded, and the negative pole of the 5th diode and first junction point connect, and the 3rd of the 3rd sampling switch is defeated
Go out end ground connection, the 3rd control end is used to be input into the 3rd control signal；When positive half cycle of the power work in alternating current,
3rd control signal controls the 3rd sampling switch and is in closure state；When the power work is negative the half of alternating current
Zhou Shi, the 3rd control signal controls the 3rd sampling switch and is off.
Alternatively, first current transformer circuit also includes the 6th diode；3rd sampling switch is a N
Raceway groove insulating gate type field effect tube, the drain electrode of the first N-channel insulating gate type field effect tube is the 3rd input, source electrode
For the 3rd outfan, grid is the 3rd control end；The positive pole of the 6th diode and the 5th diode
Positive pole connects, and the negative pole of the 6th diode and the drain electrode of the first N-channel insulating gate type field effect tube connect, and source electrode connects
Ground.
Alternatively, second current transformer circuit includes the 4th current transformer, the 4th reset resistor, the seven or two pole
Pipe and the 4th sampling switch；4th sampling switch includes the 4th input, the 4th outfan and the 4th control end；Described
Two current transformers include the 4th primary side winding and the 4th vice-side winding, and it is in parallel that the 4th primary side winding is connected to described second
Junction point and first be connected in series a little between, one end of the 4th vice-side winding is respectively with the one of the 4th reset resistor
The 4th input connection of end, the positive pole of the 7th diode and the 4th sampling switch, the 4th reset resistor
The other end is grounded, and the negative pole of the 7th diode and first junction point connect, and the 4th of the 4th sampling switch is defeated
Go out end ground connection, the 4th control end is used to be input into the 4th control signal；When positive half cycle of the power work in alternating current,
4th control signal controls the 4th sampling switch and is off；When the power work is negative the half of alternating current
Zhou Shi, the 4th control signal controls the 4th sampling switch and is in closure state.
Alternatively, second current transformer circuit also includes the 8th diode；4th sampling switch is the 2nd N
Raceway groove insulating gate type field effect tube, the drain electrode of the second N-channel insulating gate type field effect tube is the 4th input, source electrode
For the 4th outfan, grid is the 4th control end；The positive pole of the 8th diode and the 7th diode
Positive pole connects, and the negative pole of the 8th diode and the drain electrode of the second N-channel insulating gate type field effect tube connect, and source electrode connects
Ground.
Alternatively, the 3rd current transformer circuit includes the 5th current transformer, the 5th reset resistor and the 9th 2
Pole pipe；5th current transformer includes the 5th primary side winding and the 5th vice-side winding, and the 5th primary side winding is connected to
Described first be connected in parallel a little and second be connected in parallel a little between, one end of the 5th vice-side winding is multiple with the described 5th respectively
One end of position resistance and the positive pole connection of the 9th diode, the other end ground connection of the 5th reset resistor, the described 9th
The negative pole of diode and first junction point connect.
In second aspect, the embodiment of the present invention provides a kind of totem-pole bridgeless circuit system, and the totem pole is without bridge circuit
System includes above-mentioned totem pole without bridge circuit, also including control unit；Described control unit includes the 5th control end, the 6th control
End processed, the 7th control end, the first control output end, the second control output end, the 3rd control output end and the 4th control output end,
5th control end is used for the both end voltage of the power supply of sampling, and the 6th control end and first junction point connect simultaneously
And for the both end voltage of the sampling resistor of sampling, the 7th control end and the load unit input connection and
For output voltage of the totem pole without bridge circuit of sampling, first control output end and first current transformer electricity
Road connection, second control output end and second current transformer circuit connection, the 3rd control output end and institute
The connection of first switch pipe is stated, the 4th control output end and the second switch pipe connect；Described control unit is according to sampling
The both end voltage of the power supply for arriving, the output voltage of the both end voltage of the sampling resistor and the totem pole without bridge circuit,
Control first current transformer circuit, second current transformer circuit, the first switch pipe and described second open
Close the working condition of pipe.
Alternatively, the totem pole also includes the 3rd current transformer circuit without bridge circuit, and it is connected to described first simultaneously
Connection junction point and second be connected in parallel a little between, the outfan of the 3rd current transformer circuit shares described first and connects
Point；When the power work is in the positive half cycle of alternating current, when the second switch pipe disconnects and the first switch pipe is closed, or
Person, when the power work disconnects in the negative half period of alternating current, the second switch pipe closure and the first switch pipe, institute
State the 3rd current transformer circuit for collection flow through the electric current of the load unit, and make described in the electric current after collection flows through
Sampling resistor.
In each embodiment of the invention, when positive half cycle of the power work in alternating current, the first current transformer circuit
The electric current to flowing through inductance is not sampled, and when second switch pipe closure and first switch pipe disconnect, the second electric current is mutual
The first electric current of second switch pipe is flow through in the collection of sensor circuit, and makes the electric current after collection flow through sampling resistor.When power supply work
Make in the negative half period of alternating current, electric current of second current transformer circuit not to flowing through inductance is sampled, and second
When switching tube disconnects and first switch pipe is closed, the second electric current of first switch pipe is flow through in the collection of the first current transformer circuit,
And make the electric current after collection flow through sampling resistor.Therefore, it need not adopt the Hall element of large volume and costliness, just may be used
To realize the collection to electric current, so as to reduce the cost and volume of product.
Description of the drawings
One or more embodiments are illustrative by the picture in corresponding accompanying drawing, these exemplary theorys
Bright not constitute the restriction to embodiment, the element with same reference numbers label is expressed as similar element in accompanying drawing, removes
Non- to have especially statement, composition is not limited the figure in accompanying drawing.
Fig. 1 is that prior art provides a kind of electrical block diagram of the totem pole without bridge circuit；
Fig. 2 is that the embodiment of the present invention provides a kind of electrical block diagram of the totem pole without bridge circuit；
Fig. 3 is that another embodiment of the present invention provides a kind of electrical block diagram of the totem pole without bridge circuit；
Fig. 4 is that another embodiment of the present invention provides a kind of electrical block diagram of the totem pole without bridge circuit；
Fig. 5 is that the embodiment of the present invention provides a kind of sequential chart of the totem pole without bridge circuit；
Fig. 5 a to Fig. 5 d are that the embodiment of the present invention provides a kind of working state schematic representation of the totem pole without bridge circuit；
Fig. 6 is that another embodiment of the present invention provides a kind of electrical block diagram of the totem pole without bridge circuit；
Fig. 7 a are that a kind of circuit structure of the first current transformer circuit of another embodiment of the present invention offer shown in Fig. 4 shows
It is intended to；
Fig. 7 b are that a kind of circuit structure of the second current transformer circuit of another embodiment of the present invention offer shown in Fig. 4 shows
It is intended to；
Fig. 8 a are that a kind of circuit structure of the first current transformer circuit of another embodiment of the present invention offer shown in Fig. 6 shows
It is intended to；
Fig. 8 b are that a kind of circuit structure of the second current transformer circuit of another embodiment of the present invention offer shown in Fig. 6 shows
It is intended to；
Fig. 9 is that the embodiment of the present invention provides a kind of structural representation of totem-pole bridgeless circuit system；
Figure 10 is the structural representation that the embodiment of the present invention provides another kind of totem-pole bridgeless circuit system；
Figure 11 is the structural representation that invention embodiment provides again another kind of totem-pole bridgeless circuit system.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Fig. 2 is that the embodiment of the present invention provides a kind of electrical block diagram of the totem pole without bridge circuit.As shown in Fig. 2 figure
Rise post includes the first bridge arm unit 101, the second bridge arm unit 102, the first current transformer circuit 103, second without bridge circuit 10
Current transformer circuit 104 and sampling resistor RS.It is in parallel that first bridge arm unit 101 and the second bridge arm unit 102 are parallel to first
Junction point 51 and second is connected in parallel a little between 52, and the first bridge arm unit 101 includes the first switch pipe Q1 of series aiding connection and the
Junction point between two switching tube Q2, first switch pipe Q1 and second switch pipe Q2 is connected in series a little 61 for first, the second bridge arm
The first diode D1 and the second diode D2 of unit 102 including series aiding connection, the first diode D1 and the second diode D2 it
Between junction point be connected in series a little 62 for second, first is connected in parallel and a little 51 and second is connected in parallel and be a little additionally operable between 52 parallel connection
Load unit 70, first be connected in series a little 61 and second be connected in series a little be additionally operable between 62 connection power supply AC1 and inductance L1, electricity
Source AC1 and inductance L1 connects.
First current transformer circuit 103 is connected to first and is connected in parallel and a little 51 and first is connected in series a little between 61, and
And connect with first switch pipe Q1.
Second current transformer circuit 104 is connected to second and is connected in parallel and a little 52 and first is connected in series a little between 61, and
And connect with second switch pipe Q2.
The outfan 1041 of the current transformer circuit 104 of outfan 1031 and second of the first current transformer circuit 103
The first junction point 10A is shared, one end of sampling resistor RS and the first junction point 10A connect, other end ground connection.
When power supply AC1 is operated in the positive half cycle of alternating current, second switch pipe Q2 is closed, when first switch pipe Q1 disconnects, the
The first electric current I10 of second switch pipe Q2 is flow through in the collection of two current transformer circuit 104, and flows the electric current I11 after collection
Over-sampling resistance RS.For example, high level indicates second switch pipe Q2 closures, and low level indicates that second switch pipe Q2 disconnects, second
Switching tube Q2 receives high level and closes, and second switch pipe is flow through in the primary side winding collection of the second current transformer circuit 104
The first electric current I10 of Q2, and the electric current I11 after vice-side winding exports collection, and flow through the electric current I11 after collection to adopt
Sample resistance RS, now external control unit outside by sample sampling resistor RS both end voltage Vcs and analyze the first electric current I10,
Because the first electric current I10 is equal to the inductive current I for flowing through inductance L1L, therefore just can collect power supply AC1 and be operated in alternating current
Positive half cycle inductive current IL.During power supply AC1 is operated in the positive half cycle of alternating current, the first current transformer circuit
The electric current to flowing through inductance L1 is not sampled.
When power supply AC1 is operated in the negative half period of alternating current, second switch pipe Q2 disconnects, when first switch pipe Q1 is closed, the
The second electric current I20 of first switch pipe Q1 is flow through in the collection of one current transformer circuit 103, and flows the electric current I21 after collection
Over-sampling resistance RS.Can obtain in the same manner, the first current transformer circuit 103 can collect power supply AC1 and be operated in the negative of alternating current
The inductive current I of half cycleL.During power supply AC1 is operated in the negative half period of alternating current, the second current transformer circuit is not right
The electric current for flowing through inductance L1 is sampled.
In the present embodiment, due to the Hall element without the need for adopting large volume and costliness, the totem pole of the present embodiment
The collection to electric current just can be realized without bridge circuit, so as to reduce the cost and volume of product.
In certain embodiments, first switch pipe Q1 or second switch pipe Q2 can be insulating gate type field effect tube MOSFET
Or insulating gate type bipolar transistor IGBT or bipolar transistor.
In certain embodiments, as shown in figure 3, the totem pole also includes the 3rd current transformer circuit without bridge circuit 10
105, it is connected to first and is connected in parallel and a little 51 and second is connected in parallel a little between 52, the 3rd current transformer circuit 105 it is defeated
Go out end 1051 and share the first junction point 10A.
When power supply AC1 is operated in the positive half cycle of alternating current, when second switch pipe Q2 disconnects and first switch pipe Q1 is closed, or
Person, when power supply AC1 is operated in the negative half period of alternating current, and second switch pipe Q2 closures and first switch pipe Q1 disconnect, the 3rd is electric
The electric current I of load unit 70 is flow through in the collection of current transformer circuit 105RL, and make the electric current I after collection1Flow through sampling resistor.Cause
This, in the positive half cycle or negative half period of alternating current, first switch pipe Q1 and second switch pipe Q2 is operated in the shape that complementation is opened
State, so as to realize each current transformer circuit of flexible to realize the sampling to electric current.
In certain embodiments, as shown in figure 4, the first current transformer circuit 103 include the first Current Transmit 1,
First reset resistor R1, the 3rd diode D3 and the first sampling switch S1.First sampling switch S1 include first input end 1a, the
One outfan 1b and the first control end 1c.First Current Transmit 1 includes the first primary side winding and the first vice-side winding, first
Primary side winding is connected to first and is connected in parallel and a little 51 and first is connected in series a little between 61, one end of the first vice-side winding respectively with
The positive pole connection of one end of the first reset resistor R1 and the 3rd diode D3, the other end ground connection of the first reset resistor R1, the 3rd
The first input end 1a connections of the negative pole of diode D3 and the first sampling switch S1, the first outfan 1b of the first sampling switch S1
For the first junction point 10A, the first control end 1c is for the first control signal CS1_EN of input.
Referring again to Fig. 4.Second current transformer circuit 104 includes the second Current Transmit 2, the second reset resistor
R2, the 4th diode D4 and the second sampling switch S2.Second sampling switch S2 include the second input 2a, the second outfan 2b and
Second control end 2c.Second Current Transmit 2 includes the second primary side winding and the second vice-side winding, the connection of the second primary side winding
Be connected in parallel second and a little 52 and first be connected in series a little between 61, one end of the second vice-side winding respectively with the second reset resistor
The positive pole connection of one end of R2 and the 4th diode D4, the other end ground connection of the second reset resistor R2, the 4th diode D4's is negative
The second input 2a connections of pole and the second sampling switch S2, the second outfan 2b of the second sampling switch S2 is the first junction point
10A, the second control end 2c is used to be input into the second control signal CS2_EN.
Referring again to Fig. 4.3rd current transformer circuit 105 includes the 5th Current Transmit 5, the 5th reset resistor R5
And the 9th diode D9.5th Current Transmit 5 includes the 5th primary side winding and the 5th vice-side winding, and the 5th primary side winding connects
It is connected on first and is connected in parallel and a little 51 and second be connected in parallel a little between 52, one end of the 5th vice-side winding resets respectively electricity with the 5th
One end of resistance R5 and the positive pole connection of the 9th diode D9, the other end ground connection of the 5th reset resistor R5, the 9th diode D9's
Negative pole and the first junction point 10A connect.
When power supply AC1 is operated in the positive half cycle of alternating current, the first control signal CS1_EN controls the first sampling switch S1
It is off.When power supply AC1 is operated in the negative half period of alternating current, the first control signal CS1_EN control first is adopted
Sample switch S1 is in closure state.When power supply AC1 is operated in the positive half cycle of alternating current, the second control signal CS2_EN control the
Two sampling switch S2 are in closure state.When power supply AC1 is operated in the negative half period of alternating current, the control of the second control signal CS2_EN
Make the second sampling switch S2 to be off.
The following is operation principle of the embodiment of the present invention totem pole without bridge circuit：
See also Fig. 5 and Fig. 5 a.When power supply AC1 input for alternating current positive half cycle when：Second switch pipe Q2 is
Actively manage, first switch pipe Q1 is continued flow tube, is operated in complementary opening state.Work as GS1It is low level, GS2When being high level, the
One sampling switch S1 disconnects, the second sampling switch S2 closures, and now the first current transformer circuit 103 is in off position.
See also Fig. 5 and Fig. 5 a.Work as GQ2It is high level, GQ1When being low level, second switch pipe Q2 closures, first
Switching tube Q1 disconnects.Electric current by the forward end of power supply AC1 flow to inductance L1, the second transformer CT2, second switch pipe Q2,
Four switching tube Q4 flow back to again the negative end of power supply AC1.Inductance L1 is operated in storage energy state, and power supply AC1 is to inductance L1 energy storage.
The primary side winding of the second Current Transmit 2 flows through forward current, and the vice-side winding of the second Current Transmit 2 also flows through forward direction
Electric current IQ2.The vice-side winding of the second Current Transmit 2, the second diode D2, the second sampling switch S2 composition commutating circuits, adopt
Collection forward current IQ2.Now first switch pipe Q1 shut-offs.The primary side winding of the 3rd Current Transmit 3 does not flow through electric current, the
The vice-side winding of three Current Transmits 3, the 3rd reset resistor R3 form reset loop.Meanwhile, the load electricity of load unit 70
Hold C1 to discharge load resistance RL.Both end voltage Vcs of sampling resistor RS is as shown in Figure 5.
See also Fig. 5 and Fig. 5 b.Work as GQ2It is low level, GQ1When being high level, second switch pipe Q2 disconnects, and first
When switching tube Q1 is closed, the primary side winding of the second Current Transmit 2 does not flow through electric current, the pair of the second Current Transmit 2
Side winding, the second reset resistor R2 form reset loop.Now first switch pipe Q1 is closed, and electric current is flowed to by the forward end of AC
Inductance L1, first switch pipe Q1, the first Current Transmit 1, the 3rd Current Transmit 5, load unit 70, the 4th switching tube
S4 flows back to again the negative end of power supply AC1.Inductance L1 is operated in the state of releasing energy, and load unit is released energy, load capacitance
It is operated in charged state.The primary side winding of the 3rd Current Transmit 5 flows through forward current, the pair of the 3rd Current Transmit 5
Side winding also flows through forward current.Then the vice-side winding of the 3rd Current Transmit 5, the 5th diode D3 constitute commutating circuit,
Collection forward current signal.
When power supply AC1 input for alternating current negative half period when：
Actively to manage, second switch pipe Q2 is continued flow tube to first switch pipe Q1, is operated in complementary opening state.Work as GS1It is high
Level, GS2When being low level, the first sampling switch S1 closures, the second sampling switch S2 disconnects, now the second current transformer electricity
Road 104 is in off position.
See also Fig. 5 and Fig. 5 c.Work as GQ2It is low level, GQ1When being high level, first switch pipe Q1 closures, second
Switching tube Q2 disconnects.Electric current flows to the 3rd switching tube S3, the first transformer CT1, first switch pipe by the negative end of power supply AC1
Q1, inductance L1 flow back to again the forward end of power supply AC1.Inductance L1 is operated in storage energy state, and power supply AC1 is to inductance L1 energy storage.
The primary side winding of the first Current Transmit 1 flows through forward current, and the vice-side winding of the first Current Transmit 1 also flows through forward direction
Electric current IQ1.Then the vice-side winding of the first Current Transmit 1, the first diode D1, the first sampling switch S1 constitute commutating circuit,
Collection forward current signal IQ1.The primary side winding of the 3rd Current Transmit 5 does not flow through electric current, the 3rd Current Transmit 5
Vice-side winding, the 3rd reset resistor R3 form reset loop.Meanwhile, load capacitance C1 is discharged load resistance RL.
See also Fig. 5 and Fig. 5 d.Work as GQ2It is high level, GQ1When being low level, second switch pipe Q2 closures, first
When switching tube Q1 disconnects, the primary side winding of the first Current Transmit 1 does not flow through electric current, the pair of the first Current Transmit 1
Side winding, the first reset resistor R1 form reset loop.Now second switch pipe Q2 is open-minded, and electric current is flowed to by the negative end of AC
3rd switching tube Q3, the 3rd Current Transmit 3, load unit 70, second switch pipe Q2, the second transformer CT2, inductance L1,
The forward end of power supply AC1 is flowed back to again.Inductance L1 is operated in the state of releasing energy, and load unit is released energy, load capacitance C1
It is operated in charged state.The primary side winding of the 3rd Current Transmit 5 flows through forward current, the pair of the 3rd Current Transmit 5
Side winding also flows through forward current.The vice-side winding of the 3rd Current Transmit 3, the 7th diode D7 composition commutating circuits, adopt
Collection forward current signal.
In certain embodiments, as shown in fig. 6, the totem pole shown in Fig. 6 without the totem pole shown in bridge circuit and Fig. 4 without bridge
The distinctive points of circuit are：
First current transformer circuit 103 includes the 3rd Current Transmit 3, the 3rd reset resistor R3, the 5th diode
D5 and the 3rd sampling switch S3.3rd sampling switch S3 includes the 3rd input 3a, the 3rd outfan 3b and the 3rd control end 3c.
3rd Current Transmit 3 includes the 3rd primary side winding and the 3rd vice-side winding, and the 3rd primary side winding is connected to the first parallel connection even
Contact 51 and first is connected in series a little between 61, one end of the 3rd vice-side winding one end respectively with the 3rd reset resistor R3,
The positive pole of five diode D5 and the 3rd input 3a connections of the 3rd sampling switch S3, another termination of the 3rd reset resistor R3
Ground, the negative pole of the 5th diode D5 and the first junction point 10A connect, the 3rd outfan 3b ground connection of the 3rd sampling switch S3, the
Three control ends 3c are used to be input into the 3rd control signal CS1_DIS.When positive half cycle of the power work in alternating current, the 3rd control letter
Number CS1_DIS controls the 3rd sampling switch S3 and is in closure state.When power supply AC1 is operated in the negative half period of alternating current, the 3rd
Control signal CS1_DIS controls the 3rd sampling switch S3 and is off.
Second current transformer circuit 104 includes the 4th Current Transmit 4, the 4th reset resistor R4, the 7th diode
D7 and the 4th sampling switch S4.4th sampling switch S4 includes the 4th input 4a, the 4th outfan 4b and the 4th control end 4c.
Second Current Transmit 4 includes the 4th primary side winding and the 4th vice-side winding, and the 4th primary side winding is connected to the second parallel connection even
Contact 52 and first is connected in series a little between 61, one end of the 4th vice-side winding one end respectively with the 4th reset resistor R4,
The positive pole of seven diode D7 and the 4th input 4a connections of the 4th sampling switch S4, another termination of the 4th reset resistor R4
Ground, the negative pole of the 7th diode D7 and the first junction point 10A connect, the 4th outfan 4b ground connection of the 4th sampling switch S4, the
Four control ends 4c are used to be input into the 4th control signal CS2_DIS.When power supply AC1 is operated in the positive half cycle of alternating current, the 4th control
Signal CS2_DIS processed controls the 4th sampling switch S4 and is off.When power supply AC1 is operated in the negative half period of alternating current,
4th control signal CS2_DIS controls the 4th sampling switch S4 and is in closure state.
In certain embodiments, the sampling switch of the first current transformer circuit 103 or the second current transformer circuit 104
Can also be using insulating gate type field effect tube MOSFET or insulating gate type bipolar transistor IGBT or bipolar transistor.Such as
Shown in Fig. 7 a and Fig. 7 b, the first sampling switch S1 and the second sampling switch S2 is N-channel MOS FET.
In certain embodiments, as shown in Figure 8 a, the totem pole shown in Fig. 8 a without the totem pole shown in bridge circuit and Fig. 6 without
The distinctive points of bridge circuit are：
First current transformer circuit 103 also includes the 6th diode D6.3rd sampling switch S3 is the insulation of the first N-channel
Grid-type field effect transistor, the drain electrode of the first N-channel insulating gate type field effect tube is the 3rd input 3a, and source electrode is the 3rd outfan
3b, grid is the 3rd control end 3c.The positive pole of the 6th diode D6 and the positive pole connection of the 5th diode D5, the 6th diode D6
Negative pole and the first N-channel insulating gate type field effect tube drain electrode connection, source ground.
As shown in Figure 8 b, the second current transformer circuit 104 also includes the 8th diode D8.4th sampling switch S4 is the
Two N-channel insulating gate type field effect tubes, the drain electrode of the second N-channel insulating gate type field effect tube is the 4th input 4a, and source electrode is
4th outfan 4b, grid is the 4th control end 4c.The positive pole of the 8th diode D8 and the positive pole connection of the 7th diode D7, the
The drain electrode connection of the negative pole of eight diode D8 and the second N-channel insulating gate type field effect tube, source ground.
In certain embodiments, as shown in figure 4, the 3rd diode D3, the 4th diode D4, the 9th diode can be passed through
The polarity of D9 is exchanged, while the first Current Transmit 1, the second Current Transmit 2, the 3rd Current Transmit 5
Same Name of Ends polarity exchanged, realize obtaining negative current on sampling resistor RS, then forward circuit is changed into by negative circuit,
To detect the both end voltage of sampling resistor RS and further to obtain inductive current.
Used as the another aspect of the embodiment of the present invention, the embodiment of the present invention provides a kind of totem-pole bridgeless circuit system.Fig. 9
It is that the embodiment of the present invention provides a kind of structural representation of totem-pole bridgeless circuit system.As shown in figure 9, totem pole is without bridge circuit
System 90 includes above-mentioned totem pole without bridge circuit 10 and control unit 20.Control unit 20 include the 5th control end Vac, the 6th
Control end Vcs, the 7th control end Vout, the first control output end CS1_EN, the second control output end CS2_EN, the 3rd control are defeated
Go out to hold GATE_Q1 and the 4th control output end GATE_Q2.5th control end Vac is used for the both end voltage of power supply AC1 of sampling, its
In, before control unit 20 is input into by the 5th control end Vac, signal processing can be carried out to the both end voltage of power supply AC1,
It is allowed to meet desired output voltage signal, and the voltage signal is loaded on into the 5th control end Vac.6th control end Vcs and
First junction point 10A connects and for the both end voltage of the sampling resistor RS that samples, the 7th control end Vout and load unit 70
Input 701 connect and for output voltage of the totem pole without bridge circuit 10 of sampling, the first control output end CS1_EN and
First current transformer circuit 103 connects, and the second control output end CS2_EN and the second current transformer circuit 104 connect, the
Three control output end GATE_Q1 and first switch pipe Q1 connect, and the 4th control output end GATE_Q2 and second switch pipe Q2 connects
Connect.
Control unit 20 is according to the both end voltage of the power supply AC1 for sampling, the both end voltage of sampling resistor RS and totem pole
Output voltage without bridge circuit 10, the first current transformer circuit 103 of control, the second current transformer circuit 104, first switch
The working condition of pipe Q1 and second switch pipe Q2.
Control unit 20 can be by general processor, digital signal processor (DSP), special IC (ASIC),
Field programmable gate array (FPGA) or other PLDs, discrete gate or transistor logic, discrete nextport hardware component NextPort
Or any combinations of these parts.Further, processor can also be any conventional processors, controller, microcontroller or shape
State machine.Processor can also be implemented as the combination of computing device, for example, the combination of DSP and microprocessor, multiple microprocessors
Device, one or more microprocessors combine DSP core or any other this configuration.
In the present embodiment, due to the Hall element without the need for adopting large volume and costliness, the totem pole of the present embodiment
The collection to electric current just can be realized without bridge circuit system, so as to reduce the cost and volume of product.
In certain embodiments, as shown in Figure 10 and Figure 11, totem pole also includes the 3rd current transformer without bridge circuit 10
Circuit 105, it is connected to first and is connected in parallel and a little 51 and second is connected in parallel a little between 52, the 3rd current transformer circuit 105
Outfan share the first junction point 10A.When power supply AC1 is operated in the positive half cycle of alternating current, second switch pipe Q2 disconnects and the
When one switching tube Q1 is closed, or, when power supply AC1 is operated in the negative half period of alternating current, second switch pipe Q2 closures and first open
When closing pipe Q1 disconnections, the 3rd current transformer circuit 105 is used for collection and flows through the electric current of load unit 70, and makes after collection
Electric current flows through sampling resistor RS.
Because the totem pole of totem-pole bridgeless circuit system 90 is based on totem as shown in Figures 1 to 8 without bridge circuit 10
Design of the post without bridge circuit, on the premise of content is not collided with each other, the totem pole of totem-pole bridgeless circuit system 90 is without bridge electricity
Road 10 can quote totem pole as shown in Figures 1 to 8 without bridge circuit, will not be described here.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；At this
Under the thinking of invention, can also be combined between the technical characteristic in above example or different embodiment, step can be with
With random order realization, and there are many other changes of the different aspect of the present invention as above, in order to simple and clear, they do not have
Have and provided in details；Although being described in detail to the present invention with reference to the foregoing embodiments, the ordinary skill people of this area
Member should be understood：It still can modify to the technical scheme described in foregoing embodiments, or to which part skill
Art feature carries out equivalent；And these modifications or replacement, do not make each reality of essence disengaging the application of appropriate technical solution
Apply the scope of a technical scheme.
Claims (11)
1. a kind of totem pole is without bridge circuit, including be parallel to first be connected in parallel a little and second be connected in parallel a little between the first bridge
Arm unit and the second bridge arm unit, first bridge arm unit includes the first switch pipe and second switch pipe of series aiding connection, institute
The junction point stated between first switch pipe and second switch pipe is connected in series a little for first, and second bridge arm unit includes in the same direction
First diode and the second diode of series connection, the junction point between first diode and the second diode is the second series connection
Junction point, described first be connected in parallel a little and second be connected in parallel a little between be additionally operable to shunt load unit, first series connection
Junction point and second be connected in series a little between be additionally operable to connect power supply and inductance, the power supply and inductance are connected, it is characterised in that
The totem pole also includes the first current transformer circuit, the second current transformer circuit and sampling resistor without bridge circuit；
First current transformer circuit be connected to described first be connected in parallel a little and described first be connected in series a little between, and
And connect with the first switch pipe；
Second current transformer circuit be connected to described second be connected in parallel a little and described first be connected in series a little between, and
And connect with the second switch pipe；
The outfan of first current transformer circuit and the outfan of the second current transformer circuit share the first junction point,
One end of the sampling resistor and first junction point connect, other end ground connection；
When positive half cycle of the power work in alternating current, first current transformer circuit is not to flowing through the inductance
Electric current is sampled, and when second switch pipe closure and the first switch pipe disconnect, second Current Mutual Inductance
Device circuit is used for collection and flows through the first electric current of the second switch pipe, and makes the electric current after collection flow through the sampling electricity
Resistance；
When negative half period of the power work in alternating current, second current transformer circuit is not to flowing through the inductance
Electric current is sampled, and when the second switch pipe disconnects and the first switch pipe is closed, first Current Mutual Inductance
Device circuit is used for collection and flows through the second electric current of the first switch pipe, and makes the electric current after collection flow through the sampling electricity
Resistance.
2. totem pole according to claim 1 is without bridge circuit, it is characterised in that the totem pole also includes the without bridge circuit
Three current transformer circuits, its be connected to described first be connected in parallel a little and second be connected in parallel a little between, the 3rd electric current
The outfan of transformer circuit shares first junction point；
When the power work is in the positive half cycle of alternating current, the second switch pipe disconnects, when the first switch pipe is closed, or
Person, when the power work is in the negative half period of alternating current, the second switch pipe is closed, when the first switch pipe disconnects, institute
State the 3rd current transformer circuit for collection flow through the electric current of the load unit, and make described in the electric current after collection flows through
Sampling resistor.
3. totem pole according to claim 1 is without bridge circuit, it is characterised in that
First current transformer circuit is adopted including the first current transformer, the first reset resistor, the 3rd diode and first
Sample is switched；
First sampling switch includes first input end, the first outfan and the first control end；
First current transformer includes the first primary side winding and the first vice-side winding, and first primary side winding is connected to institute
State first be connected in parallel a little and first be connected in series a little between, one end of first vice-side winding resets respectively with described first
The positive pole connection of one end of resistance and the 3rd diode, the other end ground connection of first reset resistor, the described 3rd 2
The first input end connection of the negative pole of pole pipe and first sampling switch, the first outfan of first sampling switch is institute
The first junction point is stated, first control end is used to be input into the first control signal；
When positive half cycle of the power work in alternating current, first control signal controls first sampling switch and is in
Off-state；
When negative half period of the power work in alternating current, first control signal controls first sampling switch and is in
Closure state.
4. totem pole according to claim 1 is without bridge circuit, it is characterised in that
Second current transformer circuit is adopted including the second current transformer, the second reset resistor, the 4th diode and second
Sample is switched；
Second sampling switch includes the second input, the second outfan and the second control end；
Second current transformer includes the second primary side winding and the second vice-side winding, and second primary side winding is connected to institute
State second be connected in parallel a little and first be connected in series a little between, one end of second vice-side winding resets respectively with described second
The positive pole connection of one end of resistance and the 4th diode, the other end ground connection of second reset resistor, the described 4th 2
The second input connection of the negative pole of pole pipe and second sampling switch, the second outfan of second sampling switch is institute
The first junction point is stated, second control end is used to be input into the second control signal；
When positive half cycle of the power work in alternating current, second control signal controls second sampling switch and is in
Closure state；
When negative half period of the power work in alternating current, second control signal controls second sampling switch and is in
Off-state.
5. totem pole according to claim 1 is without bridge circuit, it is characterised in that
First current transformer circuit is adopted including the 3rd current transformer, the 3rd reset resistor, the 5th diode and the 3rd
Sample is switched；
3rd sampling switch includes the 3rd input, the 3rd outfan and the 3rd control end；
3rd current transformer includes the 3rd primary side winding and the 3rd vice-side winding, and the 3rd primary side winding is connected to institute
State first be connected in parallel a little and first be connected in series a little between, one end of the 3rd vice-side winding resets respectively with the described 3rd
The 3rd input connection of one end of resistance, the positive pole of the 5th diode and the 3rd sampling switch, the described 3rd answers
The other end ground connection of position resistance, the negative pole of the 5th diode and first junction point connect, the 3rd sampling switch
The 3rd output head grounding, the 3rd control end be used for be input into the 3rd control signal；
When positive half cycle of the power work in alternating current, the 3rd control signal controls the 3rd sampling switch and is in
Closure state；
When negative half period of the power work in alternating current, the 3rd control signal controls the 3rd sampling switch and is in
Off-state.
6. totem pole according to claim 5 is without bridge circuit, it is characterised in that
First current transformer circuit also includes the 6th diode；
3rd sampling switch be the first N-channel insulating gate type field effect tube, the first N-channel insulating gate type field effect tube
Drain electrode be the 3rd input, source electrode be the 3rd outfan, grid be the 3rd control end；
The positive pole connection of the positive pole of the 6th diode and the 5th diode, the negative pole of the 6th diode and described
The drain electrode connection of the first N-channel insulating gate type field effect tube, source ground.
7. totem pole according to claim 1 is without bridge circuit, it is characterised in that
Second current transformer circuit is adopted including the 4th current transformer, the 4th reset resistor, the 7th diode and the 4th
Sample is switched；
4th sampling switch includes the 4th input, the 4th outfan and the 4th control end；
Second current transformer includes the 4th primary side winding and the 4th vice-side winding, and the 4th primary side winding is connected to institute
State second be connected in parallel a little and first be connected in series a little between, one end of the 4th vice-side winding resets respectively with the described 4th
The 4th input connection of one end of resistance, the positive pole of the 7th diode and the 4th sampling switch, the described 4th answers
The other end ground connection of position resistance, the negative pole of the 7th diode and first junction point connect, the 4th sampling switch
The 4th output head grounding, the 4th control end be used for be input into the 4th control signal；
When positive half cycle of the power work in alternating current, the 4th control signal controls the 4th sampling switch and is in
Off-state；
When negative half period of the power work in alternating current, the 4th control signal controls the 4th sampling switch and is in
Closure state.
8. totem pole according to claim 7 is without bridge circuit, it is characterised in that
Second current transformer circuit also includes the 8th diode；
4th sampling switch be the second N-channel insulating gate type field effect tube, the second N-channel insulating gate type field effect tube
Drain electrode be the 4th input, source electrode be the 4th outfan, grid be the 4th control end；
The positive pole connection of the positive pole of the 8th diode and the 7th diode, the negative pole of the 8th diode and described
The drain electrode connection of the second N-channel insulating gate type field effect tube, source ground.
9. the totem pole according to any one of claim 3 to 8 is without bridge circuit, it is characterised in that the 3rd Current Mutual Inductance
Device circuit includes the 5th current transformer, the 5th reset resistor and the 9th diode；
5th current transformer includes the 5th primary side winding and the 5th vice-side winding, and the 5th primary side winding is connected to institute
State first be connected in parallel a little and second be connected in parallel a little between, one end of the 5th vice-side winding resets respectively with the described 5th
The positive pole connection of one end of resistance and the 9th diode, the other end ground connection of the 5th reset resistor, the described 9th 2
The negative pole of pole pipe and first junction point connect.
10. a kind of totem-pole bridgeless circuit system, it is characterised in that including totem pole as claimed in claim 1 without bridge circuit,
Also include control unit；
Described control unit includes the 5th control end, the 6th control end, the 7th control end, the first control output end, the second control
Outfan, the 3rd control output end and the 4th control output end, the 5th control end is electric for the two ends of the power supply of sampling
Pressure, the 6th control end and first junction point connect and for the both end voltage of the sampling resistor of sampling, described
The input of the 7th control end and the load unit connects and for output voltage of the totem pole without bridge circuit of sampling,
First control output end and first current transformer circuit connect, second control output end and described second electric
Current transformer circuit connects, and the 3rd control output end and the first switch pipe connect, the 4th control output end and
The second switch pipe connection；
Described control unit is according to the both end voltage of the power supply for sampling, the both end voltage of the sampling resistor and the figure
Rise output voltage of the post without bridge circuit, control first current transformer circuit, second current transformer circuit, described
The working condition of first switch pipe and the second switch pipe.
11. totem-pole bridgeless circuit systems according to claim 10, it is characterised in that the totem pole without bridge circuit also
Including the 3rd current transformer circuit, its be connected to described first be connected in parallel a little and second be connected in parallel a little between, described
The outfan of three current transformer circuits shares first junction point；
When the power work is in the positive half cycle of alternating current, when the second switch pipe disconnects and the first switch pipe is closed,
Or, when the power work disconnects in the negative half period of alternating current, the second switch pipe closure and the first switch pipe,
3rd current transformer circuit is used for collection and flows through the electric current of the load unit, and makes the electric current after collection flow through institute
State sampling resistor.
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| CN201611159938.3A CN106602896B (en) | 2016-12-15 | 2016-12-15 | Totem-pole bridgeless circuit and totem-pole bridgeless circuit system |
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| CN201611159938.3A CN106602896B (en) | 2016-12-15 | 2016-12-15 | Totem-pole bridgeless circuit and totem-pole bridgeless circuit system |
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