CN206038742U - No bridge PFC current mode sampling circuit - Google Patents
No bridge PFC current mode sampling circuit Download PDFInfo
- Publication number
- CN206038742U CN206038742U CN201620806627.0U CN201620806627U CN206038742U CN 206038742 U CN206038742 U CN 206038742U CN 201620806627 U CN201620806627 U CN 201620806627U CN 206038742 U CN206038742 U CN 206038742U
- Authority
- CN
- China
- Prior art keywords
- port
- signal
- diode
- electrically connected
- field effect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Rectifiers (AREA)
Abstract
The embodiment of the utility model provides a no bridge PFC current mode sampling circuit, no bridge PFC current mode sampling circuit includes: main circuit module, rectifier module and difference feedback module, rectifier module respectively with main circuit module with difference feedback module electric connection, the utility model discloses utilize the hall detecting element among the main circuit module to detect the rethread to system circuit rectifier module carries out the electric current rectification, passes through at last difference feedback module samples to the electric current and the difference is enlargied, is used for driving the target sampling information of no bridge PFC's the control unit work at last, and such circuit design is simple, and the precision of just sampling is higher, has avoided sample current the asymmetrical problem to appear.
Description
Technical field
This utility model is related to electronic circuit art field, more particularly to a kind of non-bridge PFC current mode sample circuit.
Background technology
At present, non-bridge PFC (Power Factor Correction, PFC) primarily to improve circuit work efficiency and
The design of a kind of topological circuit for producing, wherein current sample is important circuit link in the topological circuit.Existing nothing
In bridge PFC current mode sample circuits, mostly system power is sampled using three current transformers, located after superposition again
Reason, the sampled signal that so sampling is obtained occur the problems such as electric current is asymmetric, and sample effect is not fine.Therefore need one
Plant using the current sampling circuit that effect is preferable, sampling precision is higher.
The content of the invention
This utility model embodiment technical problem to be solved is, there is provided a kind of non-bridge PFC current mode sample circuit,
Can motor current sampling degree of accuracy.
On the one hand, this utility model embodiment is disclosed there is provided a kind of non-bridge PFC current mode sample circuit, described without bridge
PFC current mode sample circuits include：Main loop module, rectification module and differential feedback module, the rectification module respectively with institute
State main loop module and the differential feedback module is electrically connected with；
The main loop module includes first input port, the second input port and the first signal output port, described
One input port and second input port are respectively used to corresponding first AC signal of input and the second AC signal, described
Main loop module is for the negative half period waveform of the positive half cycle waveform and second AC signal of first AC signal is entered
Line misregistration overlap-add procedure, obtains the complete superposed signal of waveform, and exports the superposition by first signal output port
Signal；
The rectification module for carrying out two-way halfwave rectifier process to the superposed signal, and it is whole to export corresponding first
Stream signal and the second rectified signal, wherein, first rectified signal is complementary with second rectified signal；
The differential feedback module for being sampled to first rectified signal and second rectified signal and
The anti-phase processing and amplifying of difference, and destination sample signal is exported, the destination sample signal is used for driving the control list of non-bridge PFC
Unit.
Wherein alternatively, the main loop module includes：Hall detector part, the first capacitor and the second capacitor, institute
Stating hall detector part includes the first detection port, the second detection port, the 3rd detection port, the 4th detection port and outfan
Mouthful, the first detection port is electrically connected with the first input port, and the second detection port and described second is input into
Port is electrically connected with, and the output port is electrically connected with first signal output port, the 3rd detection port and-
15V voltage sources are electrically connected with, and the 3rd detection port is connected with the earth by first capacitor, the 4th detection
Port is electrically connected with+15V voltage sources, and the 4th detection port is connected with the earth by second capacitor.
Wherein alternatively, the main loop module also includes：First inducer, the second inducer, the first field effect transistor,
Two field effect transistor, the 3rd field effect transistor and the 4th field effect transistor；It is described second detection port by first inducer with
The drain electrode electric connection of the 3rd field effect transistor, the grid of the 3rd field effect transistor and the grid of first field effect transistor
It is electrically connected with, the drain electrode of first field effect transistor is electrically connected with second input port；Second input port leads to
The drain electrode for crossing second inducer and the 4th field effect transistor is electrically connected with, the grid of the 4th field effect transistor with it is described
The grid of the second field effect transistor is electrically connected with, and the drain electrode of second field effect transistor is electrically connected with the described second detection port,
The source electrode of first field effect transistor, the source electrode of second field effect transistor, the source electrode of the 3rd field effect transistor and described
The source electrode of the 4th field effect transistor is connected with the earth respectively.
Wherein alternatively, when first AC signal is input to the main loop module by the first input port
When middle, the hall detector part, first inducer, first field effect transistor and the 3rd field effect transistor will be led
Logical work, forms the first closed-loop path, and passes through corresponding first loop signal of second input port output, and described first
Loop signal is used for driving the components and parts of non-bridge PFC.
Wherein alternatively, when second AC signal is input to the main loop module by second input port
When middle, the hall detector part, second inducer, second field effect transistor and the 4th field effect transistor will be led
Logical work, forms the second closed-loop path, and by the first input port corresponding second servo loop signal of output, described second
Loop signal is used for driving the components and parts of non-bridge PFC.
Wherein alternatively, the rectification module includes：First diode, the second diode, the 3rd diode, the four or two pole
Pipe；The first port electricity of first signal output port second port respectively with first diode, the second diode
Property connection, the first port of first diode, the second port of second diode, the first of the 3rd diode
The second port of port and the 4th diode is electrically connected with the differential feedback module respectively, the 3rd diode
Second port and the 4th diode first port respectively with the earth be connected.
Wherein alternatively, the differential feedback module includes：First resistor device, second resistance device, 3rd resistor device, the 4th
Resistor and operational amplifier, the operational amplifier include the output of positive input port, negative input port and secondary signal
Port；Second port and described fourth of the positive input port by the 3rd resistor device respectively with second diode
The second port of diode is electrically connected with, the negative input port by the second resistance device respectively with first diode
First port and the first port of the 4th diode be electrically connected with, the first resistor device is bridged in the two or two pole
Between the first port of the second port of pipe and first diode is electrically connected with, the 4th resistor bridge is connected on described negative
Between input port and the secondary signal output port, the secondary signal output port is used for exporting the destination sample letter
Number.
Wherein alternatively, the differential feedback module also includes：5th resistor, the 6th resistor, the 7th resistor,
Three capacitors and the 4th capacitor, the operational amplifier also include power input port and ground connection output port, the electricity
Source input port is electrically connected with -15V the voltage sources by the 5th resistor, and the power input port passes through institute
State the 3rd capacitor to be connected with the earth；The ground connection output port is electrical with the+15V voltage sources by the 6th resistor
Connection, and the ground connection output port passes through the 4th capacitor and the earth is electrically connected with；The positive input port passes through institute
State the 7th resistor to be connected with the earth.
Wherein alternatively, the main loop module also includes：External delivery point mouth VCC, the 5th diode, the six or two pole
Pipe, the 7th diode, the 8th diode, the 5th capacitor, the 6th capacitor, the second detection port pass through the described 5th 2
Pole pipe, the 5th capacitor are electrically connected with the external delivery point mouth VCC respectively, one end of the 7th diode respectively with institute
State one end of the first inducer and the drain electrode electric connection of the 3rd field effect transistor, the other end of the 7th diode and institute
State external delivery point mouth VCC electric connections；Second input port by the 6th diode, the 6th capacitor respectively with
The external delivery point mouth VCC is electrically connected with, one end of the 8th diode respectively with one end of second inducer and
The drain electrode of the 4th field effect transistor is electrically connected with, and the other end of the 8th diode is electric with the external delivery point mouth VCC
Property connection, the external delivery point mouth VCC is used for exporting boost drive signals, and the boost drive signals are used for driving without bridge
The components and parts of PFC.
As can be seen that this utility model embodiment provide non-bridge PFC current mode sample circuit, including main loop module,
Rectification module and differential feedback module, wherein, the rectification module respectively with the main loop module and the differential feedback mould
Block is electrically connected with, and the positive half cycle waveform of the first AC signal of input can be exchanged by the main loop module with the second of input
The negative half period waveform of signal carries out staggered superposition process, obtains the complete superposed signal of waveform, then passes through the rectification module
Two-way halfwave rectifier is carried out to the superposed signal and exports corresponding first rectified signal and the second rectified signal, finally by institute
State differential feedback module to sample first rectified signal and second rectified signal and differential amplification process, output
Corresponding destination sample signal, the degree of accuracy that so can be sampled with promotion signal, while it is not right to also avoid sample rate current appearance
The problem of title.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or accompanying drawing to be used is briefly described needed for description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structural representation of non-bridge PFC current mode sample circuit of this utility model embodiment；
Fig. 2 is a kind of waveform diagram of superposed signal of this utility model embodiment；
Fig. 3 is a kind of waveform diagram of two-way rectified signal of this utility model embodiment；
Fig. 4 is a kind of waveform diagram of destination sample signal of this utility model embodiment；
Fig. 5 is a kind of connection diagram of main loop module of this utility model embodiment；
Fig. 6 is a kind of signal of two-way AC signal current direction in main loop module of this utility model embodiment
Figure；
Fig. 7 is a kind of connection diagram of rectification module of this utility model embodiment；
Fig. 8 is a kind of connection diagram of differential feedback module of this utility model embodiment；
Fig. 9 is a kind of connection diagram of non-bridge PFC current mode sample circuit of this utility model embodiment.
Specific embodiment
In order that those skilled in the art more fully understand this utility model scheme, below in conjunction with this utility model reality
The accompanying drawing in example is applied, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of this utility model part, rather than the embodiment of whole.Based on the reality in this utility model
Example is applied, the every other embodiment obtained under the premise of creative work is not made by those of ordinary skill in the art is all answered
When the scope for belonging to this utility model protection.
Term " first ", " second " and " the 3rd " in specification and claims of the present utility model and above-mentioned accompanying drawing
Etc. be for distinguishing different objects, not for description particular order.Additionally, term " including " and their any deformations, meaning
Figure is to cover non-exclusive including.Process, method, system, product or the equipment of series of steps or unit are contained for example
The step of listing or unit is not limited to, but alternatively also includes the step of not listing or unit, or alternatively also
Including other intrinsic for these processes, method, product or equipment step or unit.
Fig. 1 is referred to, is a kind of structural representation of non-bridge PFC current mode sample circuit of this utility model embodiment,
The non-bridge PFC current mode sample circuit of this utility model embodiment can include：Main loop module 1, rectification module 2 and poor
Feedback module 3, the rectification module 2 is divided to be electrically connected with the main loop module 1 and the differential feedback module 3 respectively；
Wherein, the main loop module 1 includes first input port 100, the second input port 101 and the first signal output
Port 102, the first input port 100 and second input port 102 are respectively used to input corresponding first and exchange letter
Number and the second AC signal, the main loop module 1 is for by the positive half cycle waveform and described second of first AC signal
The negative half period waveform of AC signal carries out staggered superposition process, obtains the complete superposed signal of waveform, and believes by described first
Number output port 102 exports the superposed signal；
The rectification module 2 for carrying out two-way halfwave rectifier process to the superposed signal, and exports corresponding first
Rectified signal and the second rectified signal, wherein, first rectified signal is complementary with second rectified signal；
The differential feedback module 3 for being sampled to first rectified signal and second rectified signal and
The anti-phase processing and amplifying of difference, and destination sample signal is exported, the destination sample signal is used for driving the control list of non-bridge PFC
Unit.
Wherein alternatively, the first above-mentioned AC signal and the second AC signal may refer to the both positive and negative polarity of same alternating current
Two paths of signals, or the two-way ac signal for differing is referred to, or refer to identical frequency of vibration, identical Oscillation Amplitude
Current waveform corresponding to two-way current signal, or refer to other ac signals, this utility model embodiment is not made
Limit.
As user by first ac signal and second alternating current (such as the both positive and negative polarity two-way friendship of same alternating current
Stream signal) respectively after first input port 100 and the second input port 101 are input to the main loop module, the master
Return circuit module 1 can by the positive half cycle waveform of first AC signal and the negative half period shape of second AC signal, or
The positive half cycle shape waveform of the negative half period waveform of first AC signal and second AC signal is carried out at staggered superposition
Reason (such as phase shift or delay waveform overlaid periodic, mobile dislocation are added moment etc.), obtains the complete superposition letter of waveform
Number, specifically can be found in the waveform diagram of the superposed signal provided shown in Fig. 2.The main loop module can pass through described first
, by the superposed signal input/output in the rectification module 2, the rectification module 2 can be to institute for signal output port 102
Stating superposed signal carries out two-way halfwave rectifier process, that is to say the positive half cycle waveform to the superposed signal and negative semiaxis waveform point
Halfwave rectifier process is not carried out, corresponding first rectified signal and the second rectified signal is obtained/export, using as shown in Figure 2
Superposed signal, the rectification module 2 can finally obtain provide as shown in Figure 3 two to the superposed signal type two-way halfwave rectifier
The waveform diagram of road rectified signal, wherein, the positive half cycle waveform in Fig. 3 waveform diagrams may refer to the rectification module 2
The first rectified signal that rectification is obtained, the negative half period in Fig. 3 waveform diagrams are carried out to the positive half cycle waveform of the superposed signal
Waveform may refer to the negative half period waveform of 2 pairs of superposed signals of the rectification module and carry out the second rectification letter that rectification is obtained
Number.Further, the rectification module 2 can also be by two-way halfwave rectifier first rectified signal that obtain of process and described
Second rectified signal is input in the differential feedback module 3, and the differential feedback module 3 can further to described first
Rectified signal and second rectified signal are sampled and the anti-phase processing and amplifying of difference, finally export/obtain corresponding mesh
Mark sampled signal, the destination sample signal can be used to drive the control unit of the non-bridge PFC circuits to work, using such as Fig. 3
The shown two-way rectified signal for being given, the differential feedback module 3 is sampled to which and differential amplification is processed, and finally obtains such as figure
A kind of waveform diagram of the 4 destination sample signals for being given.
The non-bridge PFC current mode sample circuit of this utility model embodiment can be found in non-bridge PFC current mode as shown in Figure 9
The connection diagram of sample circuit.
As can be seen that this utility model embodiment provide non-bridge PFC current mode sample circuit, including main loop module,
Rectification module and differential feedback module, wherein, the rectification module respectively with the main loop module and the differential feedback mould
Block is electrically connected with, and the positive half cycle waveform of the first AC signal of input can be exchanged by the main loop module with the second of input
The negative half period waveform of signal carries out staggered superposition process, obtains the complete superposed signal of waveform, then passes through the rectification module
Two-way halfwave rectifier is carried out to the superposed signal and exports corresponding first rectified signal and the second rectified signal, finally by institute
State differential feedback module to sample first rectified signal and second rectified signal and differential amplification process, output
Corresponding destination sample signal, the degree of accuracy that so can be sampled with promotion signal, while it is not right to also avoid sample rate current appearance
The problem of title.
Below each module that above-mentioned non-bridge PFC current mode sample circuit includes is set forth in.Specifically such as
The connection diagram of the main loop module be given shown in Fig. 5, the main loop module 1 include：It is hall detector part U1, first electric
Container C1 and the second capacitor C2, the hall detector part U1 include that port the 11, the 3rd is detected in the first detection port 10, second
Detection port the 12, the 4th detection port 13 and output port 14, the first detection port 10 and the first input port 100
Be electrically connected with, it is described second detection port 11 be electrically connected with second input port 101, the output port 14 with it is described
First signal output port 102 is electrically connected with, and the 3rd detection port 12 is electrically connected with -15V voltage sources, and the described 3rd
Detection port 12 is connected with the earth by the first capacitor C1, and the 4th detection port 13 is electrically connected with+15V voltage sources
Connect, and the 4th detection port 13 is connected with the earth by the second capacitor C2.
Wherein alternatively, the main loop module also includes：First inducer L1, the second inducer L2, the first field effect
Pipe Q1, the second field effect transistor Q2, the 3rd field effect transistor Q3 and the 4th field effect transistor Q4；The second detection port 11 passes through institute
State the drain electrode electric connection of the first inducer L1 and the 3rd field effect transistor Q3, the grid of the 3rd field effect transistor Q3 and institute
The grid electric connection for stating the first field effect transistor Q1 is to pass through node G21 as shown in Figure 4 by the 3rd field effect transistor Q3
Grid is electrically connected with the grid of first field effect transistor Q1, and the drain electrode of first field effect transistor Q1 and described second is input into
Port 101 is electrically connected with.Further, second input port 101 passes through the second inducer L2 with described 4th
The drain electrode of effect pipe Q4 is electrically connected with, and the grid of the 4th field effect transistor Q4 is electrical with the grid of second field effect transistor Q2
Connection, that is to say
Grid be electrically connected with, the drain electrode of second field effect transistor Q2 with described second detection port 11 be electrically connected with, described first
The source electrode of field effect transistor Q1, the source electrode of second field effect transistor Q2, the source electrode of the 3rd field effect transistor Q3 and described
The source electrode of four field effect transistor Q4 is connected with the earth respectively.
Wherein alternatively, in order to further improve the main loop module 1, or the normal work for ensureing the main loop module 1
Make, the main loop module 1 can also including external delivery point mouth PFC_VCC, the 5th diode D5, the 6th diode D6, the
Seven diode D7, the 8th diode D8, the 5th capacitor C5, the 6th capacitor C6, the second detection port 11 is by described
5th diode D5, the 5th capacitor C5 are electrically connected with the external delivery point mouth VCC respectively, that is to say that D5 and C5 is in parallel even
It is connected between the second detection port 11 and the external delivery point mouth PFC_VCC (being the external delivery point mouth VCC)；
Further, one end of the 7th diode D7 one end and the 3rd field effect transistor respectively with the first inducer L1
The drain electrode of Q3 is electrically connected with, and the other end of the 7th diode D7 is electrically connected with the external delivery point mouth PFC_VCC.Can
Selection of land, second input port 101 by the 6th diode D6, the 6th capacitor C6 respectively with the external delivery point
Mouth PFC_VCC is electrically connected with, and that is to say that D6 and C6 are connected in second input port 101 and the external delivery point mouth in parallel
Between PFC_VCC (being the external delivery point mouth VCC)；Further, one end of the 8th diode D8 respectively with institute
The drain electrode of one end and the 4th field effect transistor Q4 for stating the second inducer L2 is electrically connected with, and the 8th diode D8's is another
End is electrically connected with the external delivery point mouth PFC_VCC, and the external delivery point mouth PFC_VCC is used for output boosting and drives letter
Number, the boost drive signals can be used to drive the related components and parts work of non-bridge PFC, not describe here.
Wherein alternatively, the main loop module 1 can also include the 8th resistance R8, the 9th resistance R9, the 7th capacitor
C7, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, wherein, the 8th resistor R8 bridges/is connected across institute
State between the grid of the second field effect transistor Q2 and the source electrode of second field effect transistor Q2, the 7th capacitor C7 bridge joints/across
It is connected between the drain electrode of second field effect transistor Q2 and the source electrode of second field effect transistor Q2.Alternatively, the described 9th is electric
Resistance device R9 is bridged/is connected across between the grid of first field effect transistor Q2 and the source electrode of first field effect transistor Q2, described
8th capacitor C8 bridge/be connected across first field effect transistor Q2 drain electrode and first field effect transistor Q2 source electrode it
Between.Further, the external delivery point mouth PFC_VCC can pass through the 9th capacitor C9 and the tenth capacitor respectively
C10 is connected with the earth.
Wherein alternatively, when first AC signal is input to the major loop by the first input port 100
When in module 1, the hall detector part U1, the first inducer L1, first field effect transistor Q1 and the described 3rd
ON operation is formed the first closed-loop path, and exports corresponding first by second input port 101 by field effect transistor Q3
Loop signal, first loop signal are used for driving the components and parts of non-bridge PFC.
Wherein alternatively, when second AC signal is input to the major loop by second input port 101
When in module 1, the hall detector part U1, the second inducer L2, second field effect transistor Q2 and the described 4th
ON operation is formed the second closed-loop path, and exports corresponding second by the first input port 100 by field effect transistor Q4
Loop signal, the second servo loop signal are used for driving the components and parts of non-bridge PFC；Specifically can be found in as shown in Figure 6 illustratively to
The schematic diagram of two-way AC signal current direction in main loop module is gone out, wherein, solid line A can be expressed as the first friendship here
The schematic diagram of the first closed-loop path that stream signal input is constituted to the main loop module 1, dotted line B can be expressed as the second friendship here
The schematic diagram of the second closed-loop path that stream signal input is constituted to the main loop module 1.
In implementing, hall detector part U1 is connected in the main loop module 1, first ac signal and
The current direction of second ac signal is referred to the two-way AC signal as shown in Figure 6 electric current in main loop module
The schematic diagram of flow direction, it is (all that the AC signal of inflow can also be carried out a certain proportion of scaling by hall detector part U1 here
1 is carried out such as:1000 electric current reduces), corresponding superposed signal M is exported by the first signal output port 102, was implemented
With reference to the specific descriptions that example one is performed as described above, superposed signal M equally can also refer to waveform as shown in Figure 2 and illustrate Cheng Keyi
Figure, wherein gives GND ground wire waveforms as shown in Figure 2, and such as Fig. 2 is with the shown in solid of arrow, as shown in Figure 2, superposed signal
Waveform M is a sinusoidal wave form for ground wire waveform, is the signal on a floating ground.
Fig. 7 is referred to, a kind of connection diagram of rectification module is given, the rectification module 2 can include：One or two
Pole pipe D1, the second diode D2, the 3rd diode D3, the 4th diode D4；First signal output port 102 respectively with institute
State the second port of the first diode D1, the first port of the second diode D2 to be electrically connected with, that is to say as shown in fig. 7, described
First signal output port 102 is electrically connected with the negative pole of the positive pole and D2 of D1 respectively；Alternatively, the first diode D1
First port, the second port of the second diode D2, the first port and the described 4th 2 of the 3rd diode D3
The second port of pole pipe D4 is electrically connected with the differential feedback module 3 respectively, that is to say the negative pole of D1 as shown in Figure 7, D3
The positive pole of negative pole and D2, the positive pole of D4 are electrically connected with the difference block 3 respectively.Further, the 3rd diode
The first port of the second port of D3 and the 4th diode D4 respectively with the earth be connected, that is to say D3 positive pole and D4 bear
Pole can with the earth be connected.
In implementing, superposed signal M exported above by first signal output port 102 is input to
Halfwave rectifier is carried out in D1 to D4 in the rectification module 2 this four diodes, the two-way that can be provided as shown in Figure 3 is whole
The waveform diagram of stream signal, wherein solid line waveform A can be expressed as the first rectified signal of a points output in Fig. 7 rectification modules
Waveform diagram, dotted line waveform B can be expressed as the waveform of the second rectified signal of b points output in Fig. 7 rectification modules and illustrate
Figure.
Fig. 8 is referred to, a kind of connection diagram of differential feedback module is given, the differential feedback module 3 can be wrapped
Include：First resistor device R1, second resistance device R2,3rd resistor device R3, the 4th resistor R4 and operational amplifier IC1A, it is described
Operational amplifier IC1A includes positive input port 3, negative input port 2 and secondary signal output port 1；The positive input port
3 by the 3rd resistor device R3 respectively with the second port of the second diode D2 and the 4th diode D4 second
Port is electrically connected with, that is to say the positive input port 3 can by the 3rd resistor device R3 respectively with the positive pole of D2 and
The positive pole of D4 is electrically connected with.Alternatively, the negative input port 2 by the second resistance device R2 respectively with the one or two pole
The first port of the first port of pipe D1 and the 4th diode D4 is electrically connected with, and that is to say that the negative input port 2 can be with
It is electrically connected with the negative pole of the negative pole and D3 of D1 by the second resistance device R2 respectively.Further, the first resistor
Device R1 is bridged between the second port of the second diode D2 and the first port of the first diode D1 are electrically connected with,
The first resistor device can also be bridged/is connected across one end of R2 and one end of R3.Alternatively, the 4th resistor R4 bridges
Connect/bridge between the negative input port 2 and the secondary signal output port 3, the secondary signal output port 1 is used
In the output destination sample signal I_sen.
Wherein alternatively, the differential feedback module 3 also includes：5th resistor R5, the 6th resistor R6, the 7th resistance
Device R7, the 3rd capacitor C3 and the 4th capacitor C4, the operational amplifier IC1A also include power input port 5 and ground connection
Output port 4, the power input port 5 are electrically connected with -15V the voltage sources by the 5th resistor R5, and institute
State power input port 5 to be connected with the earth by the 3rd capacitor C3；The ground connection output port 4 is electric by the described 6th
Resistance device R6 is electrically connected with+15V the voltage sources, and the ground connection output port 4 is by the 4th capacitor C4 and the earth
It is electrically connected with；The positive input port 3 is connected with the earth by the 7th resistor R7.
In implementing, the rectification module 2 can be by the first above-mentioned rectified signal and the second above-mentioned rectified signal
It is separately input in the differential feedback module 3, first resistor device R1 in the differential feedback module 3 can be to above-mentioned
One rectified signal and the second rectified signal carry out sampling and are converted into voltage, and resistance R2 and R3 form difference channel, then are input into computing
Amplifier IC1A carries out amplifier process, due to being used for the destination sample signal demand negative value of the control unit for driving non-bridge PFC, because
This constitutes negative feedback amplifier circuit by resistance R4 and operational amplifier IC1A, finally by the secondary signal of operational amplifier IC1A
The destination sample signal of the output of output port 1 is negative value, and the waveform that specifically can be found in the destination sample signal provided such as Fig. 4 is illustrated
Figure.
A kind of connection diagram of the non-bridge PFC current mode sample circuit for providing as shown in Figure 9 is referred to, Fig. 9 integrally gives
Go out by the circuit connection diagram of each module in above-mentioned main loop module, rectification module and differential feedback module, comprehensive group
Into/constitute whole non-bridge PFC current mode sample circuit circuit connection diagram.Understand, the non-bridge PFC current mode sampling electricity
Road design is simple, high precision, particularly electric current after hall device output, superposed signal waveform is relative with GND ground wire waveforms
It is a sinusoidal wave form, is the signal on a floating ground, it is difficult to process, the patent cleverly (that is to say D1 using commutation diode
To D4) after rectification, then using difference channel, the relation on good process signal and ground.
As can be seen that this utility model embodiment provide non-bridge PFC current mode sample circuit, including main loop module,
Rectification module and differential feedback module, wherein, the rectification module respectively with the main loop module and the differential feedback mould
Block is electrically connected with, and the positive half cycle waveform of the first AC signal of input can be exchanged by the main loop module with the second of input
The negative half period waveform of signal carries out staggered superposition process, obtains the complete superposed signal of waveform, then passes through the rectification module
Two-way halfwave rectifier is carried out to the superposed signal and exports corresponding first rectified signal and the second rectified signal, finally by institute
State differential feedback module to sample first rectified signal and second rectified signal and differential amplification process, output
Corresponding destination sample signal, the degree of accuracy that so can be sampled with promotion signal, while it is not right to also avoid sample rate current appearance
The problem of title.
The above, above example only to illustrate the technical solution of the utility model, rather than a limitation；Although ginseng
This utility model is described in detail according to previous embodiment, it will be understood by those within the art that：Which is still
Technical scheme described in foregoing embodiments can be modified, or equivalent is carried out to which part technical characteristic and replace
Change；And these modifications or replacement, do not make the essence of appropriate technical solution depart from each embodiment technical scheme of this utility model
Scope.
Claims (9)
1. a kind of non-bridge PFC current mode sample circuit, it is characterised in that the non-bridge PFC current mode sample circuit includes：Lead back
Road module, rectification module and differential feedback module, the rectification module respectively with the main loop module and the differential feedback
Module is electrically connected with；
The main loop module includes first input port, the second input port and the first signal output port, and described first is defeated
Inbound port and second input port are respectively used to corresponding first AC signal of input and the second AC signal, and the master returns
Road module is for carrying out mistake by the negative half period waveform of the positive half cycle waveform and second AC signal of first AC signal
Position overlap-add procedure, obtains the complete superposed signal of waveform, and exports the superposed signal by first signal output port；
The rectification module for carrying out two-way halfwave rectifier process to the superposed signal, and exports corresponding first rectification letter
Number and the second rectified signal, wherein, first rectified signal and second rectified signal are complementary；
The differential feedback module is for being sampled and difference to first rectified signal and second rectified signal
Anti-phase processing and amplifying, and destination sample signal is exported, the destination sample signal is used for driving the control unit of non-bridge PFC.
2. non-bridge PFC current mode sample circuit as claimed in claim 1, it is characterised in that the main loop module includes：Suddenly
You detect device, the first capacitor and the second capacitor, and the hall detector part includes the first detection port, the second test side
Mouth, the 3rd detection port, the 4th detection port and output port, the first detection port are electrical with the first input port
Connection, the second detection port are electrically connected with second input port, and the output port is defeated with first signal
Exit port is electrically connected with, and the 3rd detection port is electrically connected with -15V voltage sources, and the 3rd detection port passes through institute
State the first capacitor to be connected with the earth, the 4th detection port is electrically connected with+15V voltage sources, and the 4th test side
Mouth is connected by second capacitor and the earth.
3. non-bridge PFC current mode sample circuit as claimed in claim 2, it is characterised in that the main loop module also includes：
First inducer, the second inducer, the first field effect transistor, the second field effect transistor, the 3rd field effect transistor and the 4th field effect transistor；
Drain electrode of the second detection port by first inducer with the 3rd field effect transistor is electrically connected with, described 3rd
The grid of the grid of effect pipe and first field effect transistor is electrically connected with, the drain electrode of first field effect transistor and described the
Two input ports are electrically connected with；Drain electrode of second input port by second inducer and the 4th field effect transistor
It is electrically connected with, the grid of the 4th field effect transistor is electrically connected with the grid of second field effect transistor, second effect
Should pipe drain electrode and described second detection port be electrically connected with, the source electrode of first field effect transistor, second field effect transistor
Source electrode, the source electrode of the 3rd field effect transistor and the 4th field effect transistor source electrode respectively with the earth be connected.
4. non-bridge PFC current mode sample circuit as claimed in claim 3, it is characterised in that
When first AC signal is input in the main loop module by the first input port, the Hall inspection
Device, first inducer, first field effect transistor and the 3rd field effect transistor are surveyed by ON operation, first is formed
Closed-loop path, and corresponding first loop signal is exported by second input port, first loop signal is used for driving
The components and parts of dynamic non-bridge PFC.
5. non-bridge PFC current mode sample circuit as claimed in claim 3, it is characterised in that
When second AC signal is input in the main loop module by second input port, the Hall inspection
Device, second inducer, second field effect transistor and the 4th field effect transistor are surveyed by ON operation, second is formed
Closed-loop path, and corresponding second servo loop signal is exported by the first input port, the second servo loop signal is used for driving
The components and parts of dynamic non-bridge PFC.
6. non-bridge PFC current mode sample circuit as claimed in claim 1, it is characterised in that the rectification module includes：First
Diode, the second diode, the 3rd diode, the 4th diode；First signal output port is respectively with the described 1st
The second port of pole pipe, the first port of the second diode are electrically connected with, the first port of first diode, described second
The second port of the second port of diode, the first port of the 3rd diode and the 4th diode respectively with institute
State the first port difference of the electric connection of differential feedback module, the second port of the 3rd diode and the 4th diode
It is connected with the earth.
7. non-bridge PFC current mode sample circuit as claimed in claim 6, it is characterised in that the differential feedback module includes：
First resistor device, second resistance device, 3rd resistor device, the 4th resistor and operational amplifier, the operational amplifier include
Positive input port, negative input port and secondary signal output port；The positive input port is by the 3rd resistor device point
It is not electrically connected with the second port of second diode and the second port of the 4th diode, the negative input end
First port and the first port of fourth diode of the mouth by the second resistance device respectively with first diode
It is electrically connected with, second port and the first end of first diode of the first resistor device bridge joint in second diode
Between mouth is electrically connected with, the 4th resistor bridge is connected between the negative input port and the secondary signal output port,
The secondary signal output port is used for exporting the destination sample signal.
8. non-bridge PFC current mode sample circuit as claimed in claim 7, it is characterised in that the differential feedback module is also wrapped
Include：5th resistor, the 6th resistor, the 7th resistor, the 3rd capacitor and the 4th capacitor, the operational amplifier is also
Including power input port and ground connection output port, the power input port is by the 5th resistor and -15V voltage sources
It is electrically connected with, and the power input port is connected with the earth by the 3rd capacitor；The ground connection output port passes through
6th resistor is electrically connected with+15V voltage sources, and the ground connection output port is by the 4th capacitor and the earth
It is electrically connected with；The positive input port is connected with the earth by the 7th resistor.
9. non-bridge PFC current mode sample circuit as claimed in claim 3, it is characterised in that the main loop module also includes：
It is external delivery point mouth VCC, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the 5th capacitor, the 6th electric
Container, the second detection port are electric with the external delivery point mouth VCC respectively by the 5th diode, the 5th capacitor
Property connection, one end and the drain electrode of the 3rd field effect transistor respectively with first inducer of one end of the 7th diode
It is electrically connected with, the other end of the 7th diode is electrically connected with the external delivery point mouth VCC；Second input port
It is electrically connected with the external delivery point mouth VCC by the 6th diode, the 6th capacitor respectively, the 8th diode
One end be electrically connected with the drain electrode of one end of second inducer and the 4th field effect transistor respectively, the eight or two pole
The other end of pipe is electrically connected with the external delivery point mouth VCC, and the external delivery point mouth VCC is used for exporting boosting and driving believing
Number, the boost drive signals are used for driving the components and parts of non-bridge PFC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620806627.0U CN206038742U (en) | 2016-07-28 | 2016-07-28 | No bridge PFC current mode sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620806627.0U CN206038742U (en) | 2016-07-28 | 2016-07-28 | No bridge PFC current mode sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206038742U true CN206038742U (en) | 2017-03-22 |
Family
ID=58307970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620806627.0U Active CN206038742U (en) | 2016-07-28 | 2016-07-28 | No bridge PFC current mode sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206038742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093533A (en) * | 2016-07-28 | 2016-11-09 | 深圳茂硕电子科技有限公司 | A kind of non-bridge PFC current mode sample circuit |
-
2016
- 2016-07-28 CN CN201620806627.0U patent/CN206038742U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093533A (en) * | 2016-07-28 | 2016-11-09 | 深圳茂硕电子科技有限公司 | A kind of non-bridge PFC current mode sample circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103259487B (en) | The method of Frequency Converter Control motor and frequency converter | |
| CN103248293A (en) | TMS320F2812 based speed regulation controller of brushless DC motor | |
| CN206908529U (en) | The inversion system and inverter circuit, polyphase inverter of suppression common mode interference | |
| CN105116956B (en) | A kind of maximal power tracing controlling apparatus applied to photovoltaic generating system | |
| CN206038742U (en) | No bridge PFC current mode sampling circuit | |
| CN106771681A (en) | The three-phase alternating current detection device for phase sequence and its detection method of a kind of induction heating equipment of medium frequency | |
| CN206832896U (en) | A kind of three-phase power input phase-loss detection circuit | |
| CN101598749A (en) | Three-phase does not have the center line alternating current zero crossing detection device | |
| CN106383264A (en) | Anti-interference high-precision zero-crossing detection method | |
| CN105099210B (en) | A kind of electricity capacity separation sensor | |
| CN209264878U (en) | Incremental type encoder offline detection circuit and motor driver | |
| CN206057406U (en) | A kind of non-bridge PFC current/voltage type sample circuit | |
| CN106093533A (en) | A kind of non-bridge PFC current mode sample circuit | |
| CN106771533A (en) | A kind of alternating current current detection circuit that can reflect direct current biasing state based on Magnetic isolation | |
| CN206114759U (en) | Zero -crossing detection circuit | |
| CN202471823U (en) | Photo-coupling isolation line voltage zero-detection circuit | |
| CN203054062U (en) | AC voltage signal detection circuit | |
| CN209358458U (en) | Direct current biasing inhibits device, electric machine controller and AC machine drive system | |
| CN204967761U (en) | Photovoltaic inverter low voltage ride through testing arrangement | |
| CN104638958B (en) | SPWM (Sinusoidal Pulse Width Modulation) delaying control method used for power type Z source inverter | |
| CN106160552A (en) | A kind of pure sine wave inverter with current sample input isolation features | |
| CN206595904U (en) | A kind of waveform conversion signal process circuit | |
| CN103187891B (en) | The carrier wave amplitude adjustment control system of single-phase controllable rectifier | |
| CN207557314U (en) | A kind of DC suppling equipment line inspection instrument test circuit | |
| CN106059374A (en) | Pure sine wave inverter with voltage sampling isolation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |