CN206490578U - A kind of totem pillar power factor correcting and electronic equipment - Google Patents
A kind of totem pillar power factor correcting and electronic equipment Download PDFInfo
- Publication number
- CN206490578U CN206490578U CN201720147488.XU CN201720147488U CN206490578U CN 206490578 U CN206490578 U CN 206490578U CN 201720147488 U CN201720147488 U CN 201720147488U CN 206490578 U CN206490578 U CN 206490578U
- Authority
- CN
- China
- Prior art keywords
- diode
- couples
- switching device
- current
- unit
- 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
A kind of totem pillar power factor correcting and electronic equipment, the power factor correcting include：Inductance；First bridge arm of first switch device and second switch device including series connection；Second bridge arm of the 3rd switching device and the 4th switching device including series connection；At least one electric current sensing unit, is configured to sense the electric current of at least one flowed through in first, second, third and fourth switching device, to obtain corresponding at least induced-current all the way；At least one rectification unit, is corresponded with least one electric current sensing unit, and each rectification unit after induced-current carries out rectification all the way accordingly to transmitting to current detecting unit；Current detecting unit is according at least induced-current obtains testing result all the way；Switch control unit, produces switch controlling signal, to control the first and second switching device alternation switch states according to testing result.Scheme cost of the present utility model is relatively low, practical.
Description
Technical field
The utility model is related to power factor correction technology, more particularly to a kind of totem pillar power factor correcting and
Electronic equipment.
Background technology
Power factor (Power Factor, abbreviation PF) is a kind of parameter for weighing electrical equipment power consumption efficiency.For
Raising power consumption efficiency, provides to before electrical equipment by ac input signal, generally all first ac input signal can be entered
Row PFC (Power Factor Correction, abbreviation PFC).Power factor correcting generally all passes through
Reduce the phase difference between voltage and current to improve power factor.
Totem (Totem Pole) formula power factor correcting is a kind of power factor correcting of main flow, its electricity
Line structure can be found in Fig. 1.Totem pillar power factor correcting shown in Fig. 1 can include：Inductance L1, output capacitance Co,
First bridge arm l1 and the second bridge arm l2.Wherein, the first bridge arm l1 includes switching tube Q1 and switching tube Q2, and the two is in the first tie point
A connections；Second bridge arm 12 includes switching tube Q3 and switching tube Q4, and the two is in the second tie point B connections；Inductance L1 the second end connects
Meet the first tie point A.Switching tube Q1 and Q2 are supervisor, can generally select the metal-oxide-semiconductor based on gallium nitride (GaN) material,
General higher, the discharge and recharge for controlling whole power factor correcting 100 of its working frequency；Switching tube Q3 and Q4 are used for same
Rectification is walked, alternate conduction is distinguished in AC-input voltage AC positive and negative half cycle.
, it is necessary to flowing through the switching tube Q1 into Q4 extremely in the totem pillar power factor correcting 100
Few one electric current carries out current detecting, and is produced according to the current detecting result for controlling the switching tube Q1 and Q2 to become
The switch controlling signal of more on off state.
Although having been disclosed for the scheme of many totem pillar power factor correctings in the prior art, from electricity
Road cost angle is evaluated costly, and practicality is not high.So, totem pillar power factor correcting how is constantly reduced
Cost, improve circuit practicality be a urgent problem to be solved.
Utility model content
The technical problem that the utility model is solved is how to reduce the cost of totem pillar power factor correcting,
Improve the practicality of circuit.
For above-mentioned technical problem, the utility model embodiment provides a kind of totem pillar power factor correcting,
Including：First input end, the second input, are configured to receive ac input signal；First output end, the second output end, configuration
To provide output signal to output loading；Inductance, its first end couples the first input end；First bridge arm, its first end is straight
Connect or couple first output end indirectly, its second end directly or indirectly couples second output end, described first
Bridge arm includes the first switch device and second switch device of series connection, first switch device and second switch the device connection
First tie point couples the second end of the inductance；Second bridge arm, its first end couples first output end, its second end coupling
Second output end is connect, second bridge arm includes the 3rd switching device and the 4th switching device of series connection, and the described 3rd opens
The second tie point for closing device and the connection of the 4th switching device couples second input；At least one electric current sensing unit,
At least one described electric current sensing unit is configured to sensing and flows through the first switch device, second switch device, the 3rd switch
The electric current of at least one in device and the 4th switching device, to obtain corresponding at least induced-current all the way；At least one is whole
Unit is flowed, is corresponded with least one described electric current sensing unit, each rectification unit is configured to sensing all the way accordingly
Electric current is transmitted to current detecting unit after carrying out rectification；The current detecting unit, is configured at least all the way sense according to
Electric current obtains testing result；Switch control unit, couples the current detecting unit, first switch device and second switch device
Part, the switch control unit is configured to produce switch controlling signal according to the testing result, to control the first switch
Device and second switch device alternation switch state.
Alternatively, at least one described electric current sensing unit includes：First current transformer, its windings in series is in institute
State between the second end of the first bridge arm and first tie point, its secondary winding is configured as output to the first induced-current；Second
Current transformer, its windings in series between the first end and first tie point of first bridge arm, its it is secondary around
Group is configured as output to the second induced-current；At least one described rectification unit includes：First rectification unit, is configured to described
One induced-current is transmitted to the current detecting unit after carrying out rectification；Second rectification unit, is configured to sense to described second
Electric current is transmitted to the current detecting unit after carrying out rectification.
Alternatively, first rectification unit includes：First diode, the second diode, the 3rd diode, the four or two pole
Pipe, the 5th switching device and the 6th switching device；Wherein, the positive pole of the negative pole of first diode and the 4th diode
Couple the second end of the secondary winding of first current transformer；The negative pole of 3rd diode and second diode
Positive pole couple first current transformer secondary winding first end；The positive pole of first diode and the described 3rd
The positive pole of diode couples the first output end of first rectification unit；The negative pole of second diode is via the described 5th
Switching device couples the second output end of first rectification unit；The negative pole of 4th diode is via the described 6th switch
Device is coupled to the second output end of first rectification unit；Second rectification unit includes：7th diode, the eight or two
Pole pipe, the 9th diode, the tenth diode, the 7th switching device and the 8th switching device；Wherein, the 7th diode is negative
The positive pole of pole and the tenth diode couples the second end of the secondary winding of second current transformer；9th 2 pole
The positive pole of the negative pole of pipe and the 8th diode couples the first end of the secondary winding of second current transformer；Described
The positive pole of the positive pole of seven diodes and the 9th diode couples the first output end of second rectification unit；Described 8th
The negative pole of diode is coupled to the second output end of second rectification unit via the 7th switching device；Described 12nd
The negative pole of pole pipe is coupled to the second output end of second rectification unit via the 8th switching device.
Alternatively, the current detecting unit has current detecting end and reference edge, and the current detecting end coupling is described
Second output end of the second output end of the first rectification unit and second rectification unit, the reference edge coupling described first
First output end of the first output end of rectification unit and second rectification unit, the current detecting unit includes：First
Load, its first end couples the current detecting end, and its second end couples the reference edge；Voltage check part, is configured to root
The testing result is produced according to the voltage between the current detecting end and reference edge.
Alternatively, the current detecting unit has current detecting end and reference edge, the reference edge coupling described first
First output end of rectification unit, the current detecting end couples the second output end of second rectification unit, the electric current
Detection unit includes：First load, the first end of first load couples the current detecting end, and the of first load
Two ends couple the 3rd tie point；Second load, the first end of second load couples the 3rd tie point, and described second is negative
The second end carried couples the reference edge, and the 3rd tie point couples the second output end of first rectification unit and described
First output end of the second rectification unit；Voltage check part, is configured to according between the current detecting end and reference edge
Voltage produces the testing result.
Alternatively, the secondary winding of first current transformer has the first tap；First rectification unit includes：
5th diode, the positive pole of the 5th diode couples the first end of the secondary winding of first current transformer, described
The negative pole of 5th diode couples the second output end of first rectification unit via the 5th switching device；6th diode,
The positive pole of 6th diode couples the second end of the secondary winding of first current transformer, the 6th diode
Negative pole couples the second output end of first rectification unit via the 6th switching device；5th switching device and the 6th is opened
Close device；Wherein, first tap couples the first output end of first rectification unit；Second current transformer
Secondary winding includes the second tap；Second rectification unit includes：11st diode, the positive pole of the 11st diode
The first end of the secondary winding of second current transformer is coupled, the negative pole of the 11st diode is via the 7th derailing switch
Part couples the second output end of second rectification unit；12nd diode, the positive pole coupling institute of the 12nd diode
The second end of the secondary winding of the first current transformer is stated, the negative pole of the 12nd diode is coupled via the 8th switching device
Second output end of second rectification unit；7th switching device and the 8th switching device；Wherein, second tap
Couple the first output end of second rectification unit.
Alternatively, the current detecting unit has current detecting end and reference edge, and the current detecting end coupling is described
Second output end of the second output end of the first rectification unit and second rectification unit, the reference edge coupling described first
First output end of the first output end of rectification unit and second rectification unit, the current detecting unit includes：First
Load, its first end couples the current detecting end, and its second end couples the reference edge；Voltage check part, is configured to root
The testing result is produced according to the voltage between the current detecting end and reference edge.
Alternatively, the current detecting unit has current detecting end and reference edge, the reference edge coupling described first
First output end of rectification unit, the current detecting end couples the second output end of second rectification unit, the electric current
Detection unit includes：First load, the first end of first load couples the current detecting end, and the of first load
Two ends couple the 3rd tie point；Second load, the first end of second load couples the 3rd tie point, and described second is negative
The second end carried couples the reference edge, and the 3rd tie point couples the second output end of first rectification unit and described
First output end of the second rectification unit；Voltage check part, is configured to according between the current detecting end and reference edge
Voltage produces the testing result.
Alternatively, the control of the 5th switching device, the 6th switching device, the 7th switching device and the 8th switching device
The end coupling switch control unit；The switch control unit is configured to control the 5th switching device and the 8th derailing switch
Part is turned on, and controls the 6th switching device and the 7th switching device to turn off, or, the switch control unit is configured to control
The 5th switching device and the shut-off of the 8th switching device are made, and controls the 6th switching device and the 7th switching device to lead
It is logical.
For above-mentioned technical problem, the utility model embodiment additionally provides a kind of electronic equipment, the electronic equipment bag
Include the totem pillar power factor correcting.
Compared with prior art, the technical scheme of the utility model embodiment has the advantages that：
In the totem pillar power factor correcting of the utility model embodiment, using at least one electric current sensing unit
Sensing flows through at least one in the first switch device, second switch device, the 3rd switching device and the 4th switching device
Electric current, to obtain corresponding at least induced-current all the way, and using at least one rectification unit and at least one described electric current
Sensing unit is corresponded, and each rectification unit is configured to induced-current transmitted after rectification to electric current inspection all the way accordingly
Survey unit；Wherein, at least induced-current obtains testing result to the current detecting unit all the way, and feed back the inspection according to
Result is surveyed to switch control unit to produce for controlling the first switch device and second switch device alternation switch state
Switch controlling signal.Wherein, the utility model embodiment is whole with least one using at least one described electric current sensing unit
Stream unit obtains at least induced-current all the way, and induced-current obtains testing result, overall plan knot all the way according to described at least
Structure is simple, circuit cost is low, it is easy to implement, practical.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of totem pillar power factor correcting of the prior art.
Fig. 2 is the electrical block diagram of the totem pillar power factor correcting of the utility model first embodiment.
Fig. 3 is the circuit diagram of the totem pillar power factor correcting of the utility model first embodiment.
Fig. 4 is the work wave schematic diagram of the totem pillar power factor correcting of the utility model first embodiment.
Fig. 5 is the equivalent electric of totem pillar power factor correcting shown in Fig. 3 in the positive half cycle of ac input signal
Lu Tu.
Fig. 6 is the work wave schematic diagram of ac input signal in Fig. 5 and current detection signal.
Fig. 7 is the equivalent electric of totem pillar power factor correcting shown in Fig. 3 in the negative half period of ac input signal
Lu Tu.
Fig. 8 is the circuit diagram of the totem pillar power factor correcting of the utility model second embodiment.
Fig. 9 is the circuit diagram of the totem pillar power factor correcting of the utility model 3rd embodiment.
Figure 10 is the circuit diagram of the totem pillar power factor correcting of the utility model fourth embodiment.
Figure 11 is the circuit diagram of the totem pillar power factor correcting of the embodiment of the utility model the 5th.
Embodiment
As described in the background section, needed in totem pillar power factor correcting to flowing through in each switching tube extremely
Few one electric current is detected, also, the project plan comparison of disclosed power factor correcting is expensive in the prior art,
Practicality is not high.
For above-mentioned technical problem, the utility model embodiment provides a kind of totem pillar power factor correcting,
Circuit cost is relatively low and practicality is high.
It is understandable to enable above-mentioned purpose of the present utility model, feature and beneficial effect to become apparent, below in conjunction with the accompanying drawings
Specific embodiment of the utility model is described in detail.
First embodiment
Reference picture 2, Fig. 2 shows the totem pillar power factor correcting according to the utility model first embodiment
100。
The totem pillar power factor correcting 100 can include first input end L, the second input N, first defeated
Go out to hold Vbulk+, the second output end Pri_RTN, inductance L1, the first bridge arm l1, the second bridge arm l2, the sensing of at least one electric current single
First (Fig. 2 is only shown exemplified by the first electric current sensing unit 101 and the second electric current sensing unit 102), at least one rectification unit (figure
Exemplified by 2 only show the first rectification unit 201 and the second rectification unit 202), current detecting unit 30 and switch control unit 40.
Furthermore, the first input end L and the second input N are configured to receive ac input signal AC, for example,
The ac input signal AC can be power frequency ac voltage signal, and the power frequency (line frequency) is exchange in industry
The frequency of power supply.Wherein, in China, the power frequency ac voltage signal is 50Hz, 220V；In Japan or the U.S., the power frequency
Ac voltage signal is 60Hz, 110V.
The first output end Vbulk+ and the second output end Pri_RTN are configured to provide defeated to output loading (not shown)
Go out signal (not shown).The first end of the inductance L1 couples the first input end L.
The first end of the first bridge arm l1 directly or indirectly couples the first output end Vbulk+, first bridge
Arm l1 the second end directly or indirectly couples the second output end Pri_RTN, and the first bridge arm l1 includes the of series connection
One switching device Q1 and second switch device Q2, the first connection of first switch device Q1 and second switch device the Q2 connections
Point A couples the second end of the inductance L1.Wherein, first switch device Q1 and second switch the device Q2 can be semiconductor
Switching device, the inside of the two can have equivalent body diode (body diode), and the material of the two can be carborundum
(SiC), gallium nitride (GaN) etc., but be not limited to this.First switch device Q1 and second switch the device Q2 is suitable to controlled hand over
For turning on or turning off, the switching frequency of the two can be higher, for example 60kHz.
The first end of the second bridge arm l2 couples the first output end Vbulk+, the second end of the second bridge arm l2
The second output end Pri_RTN is coupled, the second bridge arm l2 includes the 3rd switching device Q3 and the 4th derailing switch of series connection
Part Q4, the 3rd switching device Q3 and the second tie point B of the 4th switching device Q4 connections couple the second input N.
Wherein, the 3rd switching device Q3 and the 4th switching device Q4 can be conventional MOS switch pipe, but not limited to this, may be used also
To be other switching devices such as diode, triode.The 3rd switching device Q3 and the 4th switching device Q4 be suitable to by
Alternate conduction or shut-off are controlled, the switching frequency of the two can be equal to power frequency, namely the two on off state is equal to work by frequency
The control of the control signal of frequency, the on off state of the two opening much smaller than the first switch device Q1 and second switch device Q2
Close frequency.
Furthermore, the totem pillar power factor correcting 100 can also include output capacitance Co, be coupled to
Between the first output end Vbulk+ and the second output end Pri_RTN.
At least one described electric current sensing unit is configured to sensing and flows through the first switch device Q1, second switch device
The electric current of at least one in Q2, the 3rd switching device Q3 and the 4th switching device Q4, to obtain corresponding at least all the way sensing
Electric current (is not indicated) in figure.
In the present embodiment, to flow through the first switch device Q1, second switch device Q2, the 3rd switching device Q3 and
The electric current of at least one in 4th switching device Q4 is sensed, obtained after sensing it is described at least all the way induced-current by mistake
It can increase according to a certain percentage in the current in phase of at least one in the range of difference permission with aforementioned four switching device, amplitude
Plus or reduce.
At least one described rectification unit is corresponded with least one described electric current sensing unit, namely rectification unit
201 couplings corresponding with the first electric current sensing unit 101, rectification unit 202 is corresponding with the second electric current sensing unit 102
Coupling, each rectification unit is configured to being transmitted after induced-current carries out rectification all the way accordingly to the current detecting unit
30。
The current detecting unit 30 be configured to according to described at least induced-current obtains testing result all the way.
The switch control unit 40 couples the current detecting unit 30, first switch device Q1 and second switch device
Q2, the switch control unit 40 is configured to produce switch controlling signal SW1 to control described first according to the testing result
Switching device Q1 alternation switch states, and switch controlling signal SW2 is to control second switch device Q2 alternation switch states.
In specific implementation, the switch control unit 40 can use digital signal processor (Digital Singal
Processing, abbreviation DSP), single-chip microcomputer, PLD (Programmable Logic Device, abbreviation PLD)
Realize that the present embodiment is without specifically limited Deng control unit.
It should be noted that the on off state of the 3rd switching device Q3 and the 4th switching device Q4 can also be by above-mentioned
Switch control unit 40 is controlled, and other control units that can also be separately provided different from the switch control unit 40 are entered
Row control, the present embodiment is without specifically limited.
The present embodiment uses such scheme so that circuit structure is simple, and cost is relatively low, it is easy to implement, practical.
Below the present embodiment will in the lump referring to Fig. 2 and Fig. 3, in the totem pillar power factor device 100 at least
The situation that one electric current sensing unit is respectively induced the electric current for flowing through the first switch device Q1 and second switch device is carried out
Introduce.To put it more simply, switch control unit and the first switch device Q1 and second switch device Q2 institutes not shown in Fig. 3
The switch controlling signal needed.
At least one described electric current sensing unit can include the first current transformer T1 and the second current transformer T2；Tool
For body, the first electric current sensing unit 101 in Fig. 2 can include described in the first current transformer T1, Fig. 2
Second electric current sensing unit 102 can include the second current transformer T2.At least one described rectification unit can be corresponded to
Ground includes the first rectification unit 201 and the second rectification unit 202.
Furthermore, the first winding (also referred to as primary side winding) of the first current transformer T1 can be series at described
Between first bridge arm l1 the second end and the first tie point A, specifically, the first tie point A and institute can be series at
State between first switch device Q1, can be series at the first switch device Q1 and the first bridge arm l1 first end it
Between, the secondary winding (also referred to as vice-side winding) of the first current transformer T1 is configured as output to the first induced-current.Described
Two current transformer T2 first winding can be series at the first bridge arm l1 first end and the first tie point A it
Between, it specifically, can be series between the first tie point A and the second switch device Q2, can also be series at described
Between second switch device Q2 and the first bridge arm l1 the second end, the secondary winding configuration of the second current transformer T2
To export the second induced-current.The present embodiment is not intended to limit the one of the first current transformer T1 and the second current transformer T2
The turn ratio of secondary winding and secondary winding, for example, can be 1:100.
First rectification unit 201 is configured to that first induced-current is carried out to transmit after rectification to electric current inspection
Survey unit 30；Second rectification unit 202 is configured to transmit to the electric current after carrying out rectification to second induced-current
Detection unit 30.
It should be noted that the present embodiment does not limit the first electric current sensing unit 101 and the second electric current sensing unit
102 position., can be with as shown in Fig. 2 being arranged at the first switch device by taking the first electric current sensing unit 101 as an example
, can also be as shown in figure 3, being arranged at the connections of the first switch device Q1 and first between Q1 and the second output end Pri_RTN
Between point A.In addition, the present embodiment is not intended to limit the quantity of the electric current sensing unit, its quantity is at least one, when its quantity
For one when, the present embodiment can only include the first electric current sensing unit 101, and the first electric current sensing unit 101 is wrapped
The first current transformer T1 is included, as long as the first current transformer T1, which can be sensed, flows through the first switch device
The electric current of one in Q1, second switch device Q2, the 3rd switching device Q3 and the 4th switching device Q4.For example, described
First current transformer T1 first winding can be series between the first tie point A and the second switch device Q2,
Between the second end that the second switch device Q2 and the first bridge arm l1 can be series at, described first can be series at and connected
Between contact A and the first switch device Q1, it can be series at the first switch device Q1's and the first bridge arm l1
Between first end etc..It can be obtained according to the principle of totem pillar power factor correcting, as the first current transformer T1
When only sensing the electric current of one flowed through in aforementioned four switching device, namely it is only capable of sensing and flows through the first switch device
One in part Q1 and second switch device Q2 electric current, can be according to one in the electric current for flowing through the two in specific implementation
Individual calculating obtains another.
Similarly, when the quantity of the electric current sensing unit is two, the first current transformer T1 and the second electric current
Transformer T2 the electric current for flowing through the first switch device Q1 and second switch device Q2 can be sensed respectively (namely figure
Situation shown by 3), the electric current for flowing through the 3rd switching device Q3 and the 4th switching device Q4 can also be felt respectively
Should, need not move through calculating and obtain.
With continued reference to Fig. 3, in the present embodiment, first rectification unit can include：First diode D1, the two or two
Pole pipe D2, the 3rd diode D3, the 4th diode D4, the 5th switching device SW5 and the 6th switching device SW6.
Wherein, the negative pole of the first diode D1 and the 4th diode D4 positive pole coupling first electric current are mutual
Second end of sensor T1 secondary winding；The positive pole coupling institute of the negative pole of the 3rd diode D3 and the second diode D2
State the first end of the first current transformer T1 secondary winding；The positive pole and the 3rd diode D3 of the first diode D1
Positive pole couple the first output end of first rectification unit；The negative pole of the second diode D2 is via the described 5th switch
Device SW5 couples the second output end of first rectification unit；The negative pole of the 4th diode D4 is opened via the described 6th
Close the second output end that device SW6 is coupled to first rectification unit.
Second rectification unit can include：7th diode D7, the 8th diode D8, the 9th diode D9, the tenth
Diode D10, the 7th switching device SW7 and the 8th switching device SW8.
Wherein, the positive pole of the negative pole of the 7th diode D7 and the tenth diode D10 couples second electric current
Second end of transformer T2 secondary winding；The negative pole of the 9th diode D9 is coupled with the positive pole of the 8th diode D8
The first end of the secondary winding of the second current transformer T2；The positive pole and the 9th diode of the 7th diode D7
D9 positive pole couples the first output end of second rectification unit；The negative pole of the 8th diode D8 is opened via the described 7th
Close the second output end that device SW7 is coupled to second rectification unit；The negative pole of the tenth diode D10 is via described
Eight switching device SW8 are coupled to the second output end of second rectification unit.
It should be noted that first rectification unit and the second rectification unit can use above-mentioned bridge rectifier scheme,
Other full-wave rectification schemes can also be used, the present embodiment is without specifically limited.
In specific implementation, the current detecting unit has current detecting end CS+ and reference edge, in the present embodiment,
The reference edge is ground.The current detecting end CS+ couples the second output end of first rectification unit and described second whole
The second output end of unit is flowed, the reference edge couples the first output end and the second rectification list of first rectification unit
First output end of member.It should be noted that the reference edge can be ground, namely the null port of current potential, or
Current potential is equal to other ports different from zero as reference edge, and the present embodiment is without specifically limited.
The current detecting unit can include：First load R1 and voltage check part (not indicated in figure).Wherein, institute
The first end for stating the first load R1 couples the current detecting end CS+, and the second end of the first load R1 couples the reference
End；The voltage check part is configured to produce the detection according to the voltage between the current detecting end CS+ and reference edge
As a result.Wherein, it is current detection signal CS by the signal definition exported between the current detecting end CS+ and reference edge.
Hereinafter with reference to seeing that Fig. 4 to Fig. 7 says to the course of work of the totem pillar power factor correcting 100
It is bright.In order to it is clearer, concisely show in equivalent circuit, figure 5 and Fig. 7 eliminate switch control unit, switch controlling signal,
The switching device of shut-off.
Referring to Fig. 4, in the positive half cycle of the ac input signal AC, the 3rd switching device Q3 shut-offs are controlled, it is described
4th switching device Q4 is turned on.For example, the 3rd switching device Q3 and the 4th switching device Q4 is metal-oxide-semiconductor, institute can be controlled
The grid voltage G_Q3 for stating the 3rd switching device Q3 is that logic low, the grid voltage G_Q4 of the 4th switching device Q4 are
Logic high.
In specific implementation, the 5th switching device SW5, the 6th switching device SW6, the 7th switching device SW7 and
Eight switching device SW8 control end can couple the switch control unit, can also couple beyond the switch control unit
Control unit or circuit carry out on off state change, the present embodiment is without specifically limited, below to couple the switch
Exemplified by unit.In the positive half cycle of the ac input signal AC, if the of the first winding of the first current transformer T1
The first end of one end and its secondary winding is Same Name of Ends, and the first end of the first winding of the second current transformer T2 and its
The first end of secondary winding is also Same Name of Ends, and the switch control unit is configured to control the 5th switching device SW5 and the
Eight switching device SW8 are turned off, and control the 6th switching device SW6 and the 7th switching device SW7 to turn on.
Referring to Fig. 5, Fig. 5 totem pillar power factor correctings described in the positive half cycle in the ac input signal AC
100 equivalent circuit.First switch device Q1 and second switch device Q2 the controlled alternates conducting.When the first switch device
During the controlled conductings of part Q1, from the first input end L, inductance L1, the first current transformer T1, first switch device Q1 to second
Input N formation electrical circuits, the inductive current for flowing through the inductance L1 increases suddenly, and the time of the first switch device Q1 conductings gets over
Long, the inductive current is bigger.Then, the first switch device Q1 shut-offs, the second switch device Q2 is not yet turned on, and
Inductive current can not be mutated, therefore, and electric current flows to output capacitance Co by second switch device Q2 body diode.Then, when
The second switch device Q2 is begun to turn on, mutual from the first input end L, inductance L1, second switch device Q2, the second electric current
Sensor T2, the first output end Vbulk+, output capacitance Co, the second output end Pri_RTN to the second input N formation electrical circuit,
Under the energy expenditure effect of the output loading, the inductive current declines.
By the sensing and rectification to the inductive current, it can be obtained between the current detecting end CS+ and reference edge
The current detection signal CS, its waveform can be found in Fig. 4, and the current detection signal CS is full wave rectified signal, can be reflected
Go out amplitude, the phase and frequency of the ac input signal AC.
With continued reference to Fig. 5 and Fig. 6, Fig. 6 illustrate with dashed lines the ac input signal AC, be shown in solid lines the electricity
Stream detection signal CS.Wherein, it is described with the first switch device Q1 and second switch device Q2 alternate conduction and shut-off
Inductive current rises or falls.When the inductive current flows through the first switch device Q1, the inductive current rises, from
The drain electrode of the first switch device Q1 flows to the first diode D1 and the second diode in source electrode, first rectification unit
D2 is turned on, the 3rd diode D3 and the 4th diode D4 cut-offs, in current detection signal CS, then represents this with signal Ids_Q1
Process；When the inductive current flows through the second switch device Q2, inductive current declines, from the second switch device Q2
Source electrode flow direction drain electrode, the 9th diode D9 and the tenth diode D10 conductings in second rectification unit, the described 7th 2
Pole pipe D7 and the 8th diode D8 cut-offs, in current detection signal CS, then represent this process with signal Isd_Q2.
The switch control unit can be generated according to the amplitude of the current detection signal CS for controlling described first
Switching device Q1 and second switch device Q2 switch controlling signal so that the phase of the inductive current exchanges input with described
The same phases of signal AC, realize PFC.
With continued reference to Fig. 4, in the negative half period of the ac input signal AC, the 4th switching device Q4 shut-offs are controlled,
The 3rd switching device Q3 conductings.The switch control unit is configured to control the 5th switching device SW5 and the 8th and opened
Device SW8 conductings are closed, and control the 6th switching device SW6 and the 7th switching device SW7 to turn off.When the exchange input letter
When number AC is in negative half period, corresponding equivalent circuit is as shown in fig. 7, similar with positive half cycle, and be only intended to be charged and discharged opens
Device is closed to be exchanged, and synchronous rectifier has changed the 3rd switching device Q3 into by the 4th switching device Q4, this
Outside, the diode for turning on and ending in first rectification unit and the second rectification unit is interchangeable.No longer go to live in the household of one's in-laws on getting married one by one herein
State.
Second embodiment
Reference picture 8, Fig. 8 shows the totem pillar power factor correcting according to the utility model second embodiment
200, its structure is essentially identical with totem pillar power factor correcting 100 shown in Fig. 3, and the main distinction is, the electricity
Stream detection unit has current detecting end CS+ and reference edge, and the reference edge couples the first output of first rectification unit
End, the current detecting end CS+ couples the second output end of second rectification unit.The current detecting unit includes first
Load R1, the second load R2 and voltage check part (not shown).
Furthermore, the first end of the first load R1 couples the current detecting end CS+, the first load R1
The second end couple the 3rd tie point C；The first end of the second load R2 couples the 3rd tie point C, and described second is negative
The second end for carrying R2 couples the reference edge, the 3rd tie point C couple first rectification unit the second output end and
First output end of second rectification unit.The voltage check part is configured to according to the current detecting end CS+ and ginseng
The voltage examined between end produces the testing result.
The correlation that the more information of the present embodiment refer to above to the totem pillar power factor correcting 100 is retouched
State, here is omitted.
3rd embodiment
Reference picture 9, Fig. 9 shows the totem pillar power factor correcting according to the utility model 3rd embodiment
300, its structure is essentially identical with totem pillar power factor correcting 100 shown in Fig. 3, and the main distinction is, and described
One current transformer T1 secondary winding has the first tap (not indicated in figure)；First rectification unit includes：Five or two
Pole pipe D5, the 6th diode D6, the 5th switching device SW5 and the 6th switching device SW6；The two of the second current transformer T2
Secondary winding includes the second tap (not indicated in figure)；Second rectification unit includes：11st diode D11, the 12nd
Pole pipe D12, the 7th switching device SW7 and the 8th switching device SW8.
Furthermore, the positive pole of the 5th diode D5 couples the secondary winding of the first current transformer T1
First end, the negative pole of the 5th diode D5 via the 5th switching device SW5 couple first rectification unit it is second defeated
Go out end；The positive pole of the 6th diode D6 couples the second end of the secondary winding of the first current transformer T1, and described the
Six diode D6 negative pole couples the second output end of first rectification unit via the 6th switching device SW6；Wherein, it is described
First tap couples the first output end of first rectification unit.The positive pole coupling described the of the 11st diode D11
The first end of two current transformer T2 secondary winding, the negative pole of the 11st diode D11 is via the 7th switching device SW7
Couple the second output end of second rectification unit；It is mutual that the positive pole of the 12nd diode D12 couples first electric current
Second end of sensor T1 secondary winding, the negative pole of the 12nd diode D12 is described via the 8th switching device SW8 couplings
Second output end of the second rectification unit；Wherein, second tap couples the first output end of second rectification unit.
The correlation that the more information of the present embodiment refer to above to the totem pillar power factor correcting 100 is retouched
State, here is omitted.
Fourth embodiment
Reference picture 10, Figure 10 shows the totem pillar power factor correcting according to the utility model fourth embodiment
400, its structure is essentially identical with totem pillar power factor correcting 300 shown in Fig. 9, and the main distinction is, the electricity
Stream detection unit has current detecting end CS+ and reference edge, and the reference edge couples the first output of first rectification unit
End, the current detecting end CS+ couples the second output end of second rectification unit, and the current detecting unit includes：The
One load R1, the second load R2 and voltage check part (not shown).Furthermore, the first of the first load R1
The end coupling current detecting end CS+, the second end of the first load R1 couples the 3rd tie point C；The second load R2
First end couple the 3rd tie point C, the second end of the second load R2 couples the reference edge, the 3rd connection
Point C couples the second output end of first rectification unit and the first output end of second rectification unit；Voltage detection department
Part is configured to produce the testing result according to the voltage between the current detecting end CS+ and reference edge.
The correlation that the more information of the present embodiment refer to above to the totem pillar power factor correcting 300 is retouched
State, here is omitted.
5th embodiment
Reference picture 11, Figure 11 shows the totem pillar power factor correcting according to the utility model fourth embodiment
500, its structure is essentially identical with totem pillar power factor correcting 100 shown in Fig. 3, and the main distinction is, and described
Five switching device SW5, the 6th switching device SW6, the 7th switching device SW7 and the 8th switching device SW8 can be metal-oxide-semiconductor.
It should be noted that the 5th to the 8th switching device can be the semiconductor switching devices such as metal-oxide-semiconductor or triode
Part, can also be conventional switch element or is packaged in the integrated switch of chip, the present embodiment is without specifically limited.
The scheme of 5th embodiment is equally applicable to the embodiment of the utility model first to fourth.
The utility model embodiment also discloses a kind of electronic equipment, and the electronic equipment can include above-mentioned totem pillar
Power factor correcting 100,200,300,400 or 500.
Although the utility model is disclosed as above, the utility model is not limited to this.Any those skilled in the art,
Do not depart from spirit and scope of the present utility model, can make various changes or modifications, therefore protection domain of the present utility model
It should be defined by claim limited range.
Claims (10)
1. a kind of totem pillar power factor correcting, it is characterised in that including：
First input end, the second input, are configured to receive ac input signal；
First output end, the second output end, are configured to provide output signal to output loading；
Inductance, its first end couples the first input end；
First bridge arm, its first end directly or indirectly couples first output end, and its second end is directly or indirectly coupled
Second output end, first bridge arm includes the first switch device and second switch device of series connection, the first switch
Device and the first tie point of second switch device connection couple the second end of the inductance；
Second bridge arm, its first end couples first output end, and its second end couples second output end, second bridge
Arm includes the 3rd switching device and the 4th switching device of series connection, and the of the 3rd switching device and the 4th switching device connection
Two tie points couple second input；
At least one electric current sensing unit, at least one described electric current sensing unit is configured to sensing and flows through the first switch device
The electric current of at least one in part, second switch device, the 3rd switching device and the 4th switching device, with obtain it is corresponding at least
Induced-current all the way；
At least one rectification unit, is corresponded with least one described electric current sensing unit, and each rectification unit is configured to pair
Induced-current is transmitted to current detecting unit after carrying out rectification all the way accordingly；
The current detecting unit, be configured to according to described at least induced-current obtains testing result all the way；
Switch control unit, couples the current detecting unit, first switch device and second switch device, the switch control
Unit is configured to produce switch controlling signal according to the testing result, to control the first switch device and second switch device
Part alternation switch state.
2. totem pillar power factor correcting according to claim 1, it is characterised in that at least one described electric current
Sensing unit includes：
First current transformer, its windings in series between the second end of first bridge arm and first tie point,
Its secondary winding is configured as output to the first induced-current；
Second current transformer, its windings in series between the first end and first tie point of first bridge arm,
Its secondary winding is configured as output to the second induced-current；
At least one described rectification unit includes：
First rectification unit, is configured to transmit to the current detecting unit after carrying out rectification to first induced-current；
Second rectification unit, is configured to transmit to the current detecting unit after carrying out rectification to second induced-current.
3. totem pillar power factor correcting according to claim 2, it is characterised in that first rectification unit
Including：First diode, the second diode, the 3rd diode, the 4th diode, the 5th switching device and the 6th switching device；
Wherein,
The positive pole of the negative pole of first diode and the 4th diode couple first current transformer it is secondary around
Second end of group；
The positive pole of the negative pole of 3rd diode and second diode couple first current transformer it is secondary around
The first end of group；
The positive pole of the positive pole of first diode and the 3rd diode couples the first output of first rectification unit
End；
The negative pole of second diode couples the second output end of first rectification unit via the 5th switching device；
The negative pole of 4th diode is coupled to the second output of first rectification unit via the 6th switching device
End；
Second rectification unit includes：7th diode, the 8th diode, the 9th diode, the tenth diode, the 7th switch
Device and the 8th switching device；Wherein,
The positive pole of the negative pole of 7th diode and the tenth diode couple second current transformer it is secondary around
Second end of group；
The positive pole of the negative pole of 9th diode and the 8th diode couple second current transformer it is secondary around
The first end of group；
The positive pole of 7th diode and the positive pole of the 9th diode couple the first output of second rectification unit
End；
The negative pole of 8th diode is coupled to the second output of second rectification unit via the 7th switching device
End；
The negative pole of tenth diode is coupled to the second output of second rectification unit via the 8th switching device
End.
4. totem pillar power factor correcting according to claim 3, it is characterised in that the current detecting unit
With current detecting end and reference edge, the current detecting end couples the second output end and described the of first rectification unit
Second output end of two rectification units, the reference edge couples the first output end of first rectification unit and described second whole
The first output end of unit is flowed, the current detecting unit includes：
First load, its first end couples the current detecting end, and its second end couples the reference edge；
Voltage check part, is configured to produce the testing result according to the voltage between the current detecting end and reference edge.
5. totem pillar power factor correcting according to claim 3, it is characterised in that the current detecting unit
With current detecting end and reference edge, the reference edge couples the first output end of first rectification unit, the electric current inspection
The second output end that end couples second rectification unit is surveyed, the current detecting unit includes：
First load, the first end of first load couples the current detecting end, the second end coupling of first load
3rd tie point；
Second load, the first end of second load couples the 3rd tie point, the second end coupling of second load
The reference edge, the 3rd tie point couples the second output end and second rectification unit of first rectification unit
First output end；
Voltage check part, is configured to produce the testing result according to the voltage between the current detecting end and reference edge.
6. totem pillar power factor correcting according to claim 2, it is characterised in that first Current Mutual Inductance
The secondary winding of device has the first tap；First rectification unit includes：
5th diode, the positive pole of the 5th diode couples the first end of the secondary winding of first current transformer,
The negative pole of 5th diode couples the second output end of first rectification unit via the 5th switching device；
6th diode, the positive pole of the 6th diode couples the second end of the secondary winding of first current transformer,
The negative pole of 6th diode couples the second output end of first rectification unit via the 6th switching device；
5th switching device and the 6th switching device；
Wherein, first tap couples the first output end of first rectification unit；
The secondary winding of second current transformer includes the second tap；Second rectification unit includes：
11st diode, the positive pole of the 11st diode couples the first of the secondary winding of second current transformer
End, the negative pole of the 11st diode couples the second output end of second rectification unit via the 7th switching device；
12nd diode, the positive pole of the 12nd diode couples the second of the secondary winding of first current transformer
End, the negative pole of the 12nd diode couples the second output end of second rectification unit via the 8th switching device；
7th switching device and the 8th switching device；
Wherein, second tap couples the first output end of second rectification unit.
7. totem pillar power factor correcting according to claim 6, it is characterised in that the current detecting unit
With current detecting end and reference edge, the current detecting end couples the second output end and described the of first rectification unit
Second output end of two rectification units, the reference edge couples the first output end of first rectification unit and described second whole
The first output end of unit is flowed, the current detecting unit includes：
First load, its first end couples the current detecting end, and its second end couples the reference edge；
Voltage check part, is configured to produce the testing result according to the voltage between the current detecting end and reference edge.
8. totem pillar power factor correcting according to claim 6, it is characterised in that the current detecting unit
With current detecting end and reference edge, the reference edge couples the first output end of first rectification unit, the electric current inspection
The second output end that end couples second rectification unit is surveyed, the current detecting unit includes：
First load, the first end of first load couples the current detecting end, the second end coupling of first load
3rd tie point；
Second load, the first end of second load couples the 3rd tie point, the second end coupling of second load
The reference edge, the 3rd tie point couples the second output end and second rectification unit of first rectification unit
First output end；
Voltage check part, is configured to produce the testing result according to the voltage between the current detecting end and reference edge.
9. the totem pillar power factor correcting according to claim 3 or 6, it is characterised in that the 5th switch
Device, the 6th switching device, the control end of the 7th switching device and the 8th switching device couple the switch control unit；
The switch control unit is configured to control the 5th switching device and the 8th switch device conductive, and controls described the
Six switching devices and the shut-off of the 7th switching device, or, the switch control unit is configured to control the 5th switching device
Turned off with the 8th switching device, and control the 6th switching device and the 7th switch device conductive.
10. a kind of electronic equipment, it is characterised in that including the totem pillar power factor any one of claim 1 to 9
Means for correcting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720147488.XU CN206490578U (en) | 2017-02-17 | 2017-02-17 | A kind of totem pillar power factor correcting and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720147488.XU CN206490578U (en) | 2017-02-17 | 2017-02-17 | A kind of totem pillar power factor correcting and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206490578U true CN206490578U (en) | 2017-09-12 |
Family
ID=59764238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720147488.XU Active CN206490578U (en) | 2017-02-17 | 2017-02-17 | A kind of totem pillar power factor correcting and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206490578U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512411A (en) * | 2018-04-13 | 2018-09-07 | 贵州师范大学 | Digital large power totem PFC based on dual-integration sliding formwork control |
| CN109962610A (en) * | 2017-12-22 | 2019-07-02 | 恩智浦美国有限公司 | Power factor compensation circuit |
| CN111049368A (en) * | 2019-12-16 | 2020-04-21 | 深圳麦格米特电气股份有限公司 | Soft switch control method, totem-pole bridgeless circuit and totem-pole bridgeless system |
| WO2021206978A1 (en) * | 2020-04-06 | 2021-10-14 | Astec International Limited | Ac/dc power converters including current transformers for bidirectional current sensing |
| WO2022017330A1 (en) * | 2020-07-22 | 2022-01-27 | 广东美的制冷设备有限公司 | Totem-pole pfc circuit and control method therefor, circuit board, air conditioner, and storage medium |
-
2017
- 2017-02-17 CN CN201720147488.XU patent/CN206490578U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962610A (en) * | 2017-12-22 | 2019-07-02 | 恩智浦美国有限公司 | Power factor compensation circuit |
| CN108512411A (en) * | 2018-04-13 | 2018-09-07 | 贵州师范大学 | Digital large power totem PFC based on dual-integration sliding formwork control |
| CN111049368A (en) * | 2019-12-16 | 2020-04-21 | 深圳麦格米特电气股份有限公司 | Soft switch control method, totem-pole bridgeless circuit and totem-pole bridgeless system |
| WO2021206978A1 (en) * | 2020-04-06 | 2021-10-14 | Astec International Limited | Ac/dc power converters including current transformers for bidirectional current sensing |
| US11557982B2 (en) | 2020-04-06 | 2023-01-17 | Astee International Limited | AC/DC power converters including current transformers for bidirectional current sensing |
| WO2022017330A1 (en) * | 2020-07-22 | 2022-01-27 | 广东美的制冷设备有限公司 | Totem-pole pfc circuit and control method therefor, circuit board, air conditioner, and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206490578U (en) | A kind of totem pillar power factor correcting and electronic equipment | |
| CN105305848B (en) | No bridge type converter | |
| CN103944362B (en) | Charging circuit for power converter controller | |
| CN102832825B (en) | Energy-saving equipment, system and method based on igbt/field-effect transistor | |
| CN204882727U (en) | Scarce phase sequence detection circuit that reaches mutually of three -phase input voltage | |
| CN104883036B (en) | Dynamic switch formula rectification circuit and method | |
| CN110161397A (en) | For measuring the system and method for the junction temperature of transistor at work | |
| CN206759305U (en) | Totem power factor corrector and its current detecting unit | |
| CN110504828A (en) | Control circuit and control method | |
| CN104237615A (en) | Current zero-crossing detection device, signal acquisition circuit and circuit system | |
| CN106602896A (en) | Totem pole bridgeless circuit and system thereof | |
| CN109245525A (en) | A kind of electronic switch adjusting circuit and power supply based on hybrid power supply | |
| CN104242488B (en) | Wireless power transmission device and method | |
| CN206832896U (en) | A kind of three-phase power input phase-loss detection circuit | |
| CN207968333U (en) | A kind of LLC resonant converter and its control circuit, resonance current sample circuit | |
| CN104280592B (en) | A kind of passive and nondestructive high frequency Magnetic isolation type DC voltage detects circuit | |
| CN206023613U (en) | A kind of three-phase inverter power supply | |
| CN106533218B (en) | A kind of rectified three-phase circuit and drive control method | |
| TWI613881B (en) | Totem pole power factor correction circuit | |
| CN108054947A (en) | A kind of phase shifting full bridge soft switch inverter circuit suitable for wireless charging | |
| CN203457043U (en) | Interactive PFC boost topology circuit | |
| CN107813031A (en) | Portable inverter arc welding system and its power control method | |
| CN210225035U (en) | Wireless charging circuit and wireless charging system based on magnetic coupling resonance | |
| CN104237616B (en) | Electric moter voltage current zero-crossing point detects circuit | |
| CN111879994A (en) | Bidirectional current detection circuit and detection method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |