CN105141152B - Auto-excitation type BJT types are without bridge Buck Boost PFC rectification circuits - Google Patents
Auto-excitation type BJT types are without bridge Buck Boost PFC rectification circuits Download PDFInfo
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Abstract
A kind of auto-excitation type BJT types are without bridge Buck Boost PFC rectification circuits, including input capacitance Ci, positive-negative-positive BJT pipes Q1, positive-negative-positive BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, positive-negative-positive BJT pipes Q5, positive-negative-positive BJT pipes Q6, diode D1, inductance L1, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and for controlling positive-negative-positive BJT pipes Q1 base current by its port a so as to realize the control to positive-negative-positive BJT pipe Q1 working conditions and control positive-negative-positive BJT pipes Q2 base current by its port b so as to realizing the controlled current source group M1 of the control to positive-negative-positive BJT pipe Q2 working conditions.The present invention simplify driving circuit structure, drive efficiency it is higher, while obtaining the performance of easy self-starting.
Description
Technical field
The present invention relates to PFC rectification circuits, applied to exchange input, the high-quality transformation of electrical energy occasion of direct current output, such as：
Micro-energy collection system, grid-connected power generation system, battery charging system, LED illumination System etc., especially one kind is without bridge
Buck-Boost PFC rectification circuits.
Background technology
PFC rectification circuits are that AC energy can be converted into direct current by one kind with PFC (PFC) function
The circuit of energy, can improve DC load to the utilization rate of AC power and reduce current harmonics to ac bus or AC network
Pollution.
Traditional Buck-Boost PFC rectification circuits are a kind of PFC rectification circuits, and its main circuit is general by bridge rectifier electricity
Road cascade Buck-Boost circuits are formed.In order to reduce the loss of bridge rectifier, no bridge Buck-Boost PFC rectified currents
Arise at the historic moment on road.Mainly reached without bridge Buck-Boost PFC rectification circuits by reducing the method for conduction device number in path
To the purpose of lifting circuit efficiency.
In early days, the BJT of Si materials has larger drive loss, higher switching loss, larger device dynamic impedance
The shortcomings of.Therefore, in order to obtain low-power consumption, middle low power without the wholly-controled device in bridge Buck-Boost PFC rectification circuits
Use MOSFET mostly.But, MOSFET is voltage mode driver part, compared with current mode drive device BJT, MOSFET drive
Dynamic drive circuit of the circuit than BJT is more complicated.Especially in ultralow pressure or the working environment of high pressure, MOSFET drive circuits
Design difficulty is quite big.
The content of the invention
To overcome existing MOSFET types without MOSFET drive circuits complexity, driving in bridge Buck-Boost PFC rectification circuits
Less efficient, self-starting poor-performing deficiency, it is higher, same that the present invention provides a kind of simplified driving circuit structure, drive efficiency
When obtain easy self-starting performance auto-excitation type BJT types without bridge Buck-Boost PFC rectification circuits.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of auto-excitation type BJT types are managed without bridge Buck-Boost PFC rectification circuits, including input capacitance Ci, positive-negative-positive BJT
Q1, positive-negative-positive BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, positive-negative-positive BJT pipes Q5, positive-negative-positive BJT pipes Q6, diode D1,
Inductance L1, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and for being controlled by port a
Positive-negative-positive BJT pipes Q1 processed base current is so as to realize the control to positive-negative-positive BJT pipe Q1 working conditions and be controlled by port b
Positive-negative-positive BJT pipes Q2 base current is defeated so as to realize the controlled current source group M1 of the control to positive-negative-positive BJT pipe Q2 working conditions
Enter electric capacity Ci one end simultaneously with AC power vac anode, resistance R4 one end, positive-negative-positive BJT pipes Q1 emitter stage, positive-negative-positive
One end of BJT pipes Q5 emitter stage, NPN type BJT pipes Q3 emitter stage and resistance R2 is connected, positive-negative-positive BJT pipes Q1 colelctor electrode
Simultaneously with resistance R3 one end, resistance R6 one end, positive-negative-positive BJT pipes Q2 colelctor electrode, diode D1 negative electrode and inductance L1
One end be connected, diode D1 anode simultaneously with output capacitance Co one end, output voltage Vo anode and load Z1
One end is connected, output capacitance Co other end negative terminal simultaneously with output voltage Vo, the other end for loading Z1, inductance L1 it is another
The colelctor electrode at end, NPN type BJT pipes Q3 colelctor electrode and NPN type BJT pipes Q4 is connected, and NPN type BJT pipes Q4 emitter stage is simultaneously
One end, positive-negative-positive BJT pipes Q6 emitter stage, positive-negative-positive BJT pipes Q2 emitter stage, resistance R1 one end, input electricity with resistance R5
The negative terminal of the other end and AC power vac that hold Ci is connected, and NPN type BJT types Q3 base stage is connected with the resistance R1 other end,
NPN type BJT pipes Q4 base stage is connected with the resistance R4 other end, the other end of positive-negative-positive BJT pipes Q5 base stage simultaneously with resistance R2
And the resistance R3 other end is connected, positive-negative-positive BJT pipes Q6 base stage is simultaneously another with the resistance R5 other end and resistance R6
End is connected, the colelctor electrode and controlled current source group M1 port a of positive-negative-positive BJT pipes Q1 base stage simultaneously with positive-negative-positive BJT pipes Q5
It is connected, the colelctor electrode and controlled current source group M1 port b phases of positive-negative-positive BJT pipes Q2 base stage simultaneously with positive-negative-positive BJT pipes Q6
Even.
Further, resistance R1 two ends parallel connection speed-up capacitor C1, resistance R3 two ends parallel connection speed-up capacitor C2, resistance R4 two ends are simultaneously
Join speed-up capacitor C3, resistance R6 two ends parallel connection speed-up capacitor C4.The program can accelerate the auto-excitation type BJT types without bridge Buck-
The dynamic characteristic of Boost PFC rectification circuits.
Further, the controlled current source group M1 includes NPN type BJT pipes Qa1, NPN type BJT pipes Qa2, NPN type BJT pipes
Qa3, NPN type BJT pipes Qa4, resistance Ra1, resistance Ra2, resistance Ra3, resistance Ra4, resistance Ra5 and resistance Ra6, NPN type BJT pipe
Qa1 current collection extremely controlled current source group M1 port a, NPN type BJT pipes Qa3 current collection extremely controlled current source group M1 end
Mouth b, NPN type BJT pipes Qa1 emitter stage are connected with resistance Ra2 one end and resistance Ra3 one end simultaneously, NPN type BJT pipes
Qa2 base stage is connected with the resistance Ra2 other end, the base stage of NPN type BJT pipes Qa2 colelctor electrode simultaneously with NPN type BJT pipes Qa1
And resistance Ra1 one end is connected, the resistance Ra1 other end is connected with AC power vac anode, NPN type BJT pipes Qa3's
Emitter stage is connected with resistance Ra5 one end and resistance Ra6 one end simultaneously, and NPN type BJT pipes Qa4 base stage is with resistance Ra5's
The other end is connected, the base stage and resistance Ra4 one end phase of NPN type BJT pipes Qa4 colelctor electrode simultaneously with NPN type BJT pipes Qa3
Even, the resistance Ra4 other end is connected with AC power vac negative terminal, NPN type BJT pipes Qa2 emitter stage and meanwhile with resistance Ra3
The other end, the resistance Ra6 other end, NPN type BJT pipes Qa4 emitter stage and output voltage Vo negative terminal be connected.It is described from
Swash formula BJT types has input current current-limiting protection function without bridge Buck-Boost PFC rectification circuits.
Further, the controlled current source group M1 includes NPN type BJT pipes Qb1, NPN type BJT pipes Qb2, NPN type BJT pipes
Qb3, NPN type BJT pipes Qb4, diode Db1, diode Db2, resistance Rb1, resistance Rb2, resistance Rb3, resistance Rb4, resistance
Rb5, resistance Rb6, resistance Rb7, resistance Rb8 and electric capacity Cb1, resistance Rb3 one end are controlled current source group M1 port a, electricity
The one end for hindering Rb6 is controlled current source group M1 port b, the colelctor electrode phase of resistance the Rb3 other end and NPN type BJT pipes Qb1
Even, NPN type BJT pipes Qb1 base stage is connected with resistance Rb2 one end and diode Db1 negative electrode simultaneously, and resistance Rb2's is another
One end is connected with resistance Rb1 one end and NPN type BJT pipes Qb2 colelctor electrode simultaneously, the resistance Rb1 other end simultaneously with friendship
The anode for flowing power supply vac anode, NPN type BJT pipes Qb3 emitter stage and diode Db2 is connected, the resistance Rb6 other end
It is connected with NPN type BJT pipes Qb3 colelctor electrode, NPN type BJT pipes Qb3 base stage one end simultaneously with resistance Rb5 and diode
Db2 negative electrode is connected, resistance Rb5 other end one end simultaneously with resistance Rb4 and NPN type BJT pipes Qb4 colelctor electrode phase
Even, negative terminal, NPN type BJT pipes the Qb1 emitter stage and diode Db1 of the resistance Rb4 other end simultaneously with AC power vac
Anode be connected, NPN type BJT pipes Qb2 base stage simultaneously with NPN type BJT pipes Qb4 base stage, electric capacity Cb1 one end, resistance Rb8
One end and resistance Rb7 one end be connected, resistance Rb7 other end anode simultaneously with output voltage Vo, electric capacity Cb1 it is another
The emitter stage of one end, NPN type BJT pipes Qb2 emitter stage and NPN type BJT pipes Qb4 is connected, the resistance Rb8 other end and output
Voltage Vo negative terminal is connected.The auto-excitation type BJT types have output voltage stabilizing function without bridge Buck-Boost PFC rectification circuits.
The present invention technical concept be：With the development of novel semiconductor material device, the BJT of new material (such as SiC) is
Show less drive loss, it is very low resistance coefficient, faster switching speed, less temperature dependency, good
Short-circuit capacity and many advantages, such as in the absence of second breakdown.In middle low power without in bridge Buck-Boost PFC rectification circuits
Using the BJT of new material, low-power consumption can be not only obtained, but also the drive circuit of wholly-controled device can be simplified.
BJT is used without the wholly-controled device in bridge Buck-Boost PFC rectification circuits, the advantage of BJT service behaviours is utilized
And the performances such as simple circuit, high efficiency, easy self-starting can be realized simultaneously with self-excited circuit technology.
Beneficial effects of the present invention are mainly manifested in：Auto-excitation type BJT types have without bridge Buck-Boost PFC rectification circuits
AC energy is converted into the ability of direct current energy in high quality, and the absolute value of output DC voltage can be more than, be less than
Or equal to the amplitude of input ac voltage, circuit is simple, drive efficiency is high, self-starting is easy, be suitable for different control methods.
Brief description of the drawings
Fig. 1 is the basic electrical block diagram of the present invention.
Fig. 2 is that the present invention accelerates the electrical block diagram after dynamic characteristic.
Fig. 3 is the circuit diagram of the embodiment of the present invention 1.
Fig. 4 is the circuit diagram of the embodiment of the present invention 2.
Fig. 5 is the simulation work oscillogram of the embodiment of the present invention 1.
Fig. 6 is the simulation work waveform detail view of the embodiment of the present invention 1.
Fig. 7 is the simulation work oscillogram of the embodiment of the present invention 2.
Fig. 8 is the simulation work waveform detail view of the embodiment of the present invention 2.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Referring to Figures 1 and 2, a kind of auto-excitation type BJT types are without bridge Buck-Boost PFC rectification circuits, including input capacitance
Ci, positive-negative-positive BJT pipes Q1, positive-negative-positive BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, positive-negative-positive BJT pipes Q5, positive-negative-positive BJT
Pipe Q6, diode D1, inductance L1, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and use
In controlling positive-negative-positive BJT pipes Q1 base current by port a so as to realize the control to positive-negative-positive BJT pipe Q1 working conditions and
Positive-negative-positive BJT pipes Q2 base current is controlled to realize the controlled of the control to positive-negative-positive BJT pipe Q2 working conditions by port b
Current source group M1, input capacitance Ci one end simultaneously with AC power vac anode, resistance R4 one end, positive-negative-positive BJT pipes Q1
Emitter stage, positive-negative-positive BJT pipes Q5 emitter stage, NPN type BJT pipes Q3 emitter stage and resistance R2 one end be connected, positive-negative-positive
BJT pipes Q1 colelctor electrode simultaneously with resistance R3 one end, resistance R6 one end, positive-negative-positive BJT pipes Q2 colelctor electrode, diode D1
Negative electrode and inductance L1 one end be connected, diode D1 anode one end simultaneously with output capacitance Co, output voltage Vo
Anode and load Z1 one end and be connected, output capacitance Co other end negative terminal simultaneously with output voltage Vo, load Z1 it is another
One end, the inductance L1 other end, NPN type BJT pipes Q3 colelctor electrode and NPN type BJT pipes Q4 colelctor electrode are connected, NPN type BJT
Pipe Q4 emitter stage simultaneously with resistance R5 one end, positive-negative-positive BJT pipes Q6 emitter stage, positive-negative-positive BJT pipes Q2 emitter stage, resistance
The negative terminal of R1 one end, the input capacitance Ci other end and AC power vac is connected, NPN type BJT types Q3 base stage and resistance
The R1 other end is connected, and NPN type BJT pipes Q4 base stage is connected with the resistance R4 other end, and positive-negative-positive BJT pipes Q5 base stage is simultaneously
It is connected with the resistance R2 other end and the resistance R3 other end, the other end of positive-negative-positive BJT pipes Q6 base stage simultaneously with resistance R5
And the resistance R6 other end is connected, the colelctor electrode and controlled electricity of positive-negative-positive BJT pipes Q1 base stage simultaneously with positive-negative-positive BJT pipes Q5
Stream source group M1 port a is connected, the colelctor electrode and controlled current flow of positive-negative-positive BJT pipes Q2 base stage simultaneously with positive-negative-positive BJT pipes Q6
Source group M1 port b is connected.
Further, resistance R1 two ends parallel connection speed-up capacitor C1, resistance R3 two ends parallel connection speed-up capacitor C2, resistance R4 two ends are simultaneously
Join speed-up capacitor C3, resistance R6 two ends parallel connection speed-up capacitor C4.The program can accelerate the auto-excitation type BJT types without bridge Buck-
The dynamic characteristic of Boost PFC rectification circuits.
Embodiment 1：Reference picture 1, Fig. 3, Fig. 5 and Fig. 6, the embodiment of the present invention 1 have input current current-limiting protection function, it
By input capacitance Ci, positive-negative-positive BJT pipes Q1, positive-negative-positive BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, positive-negative-positive BJT pipes
Q5, positive-negative-positive BJT pipes Q6, diode D1, inductance L1, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance
R5, resistance R6, controlled current source group M1 compositions.Wherein, controlled current source M1 is managed by NPN type BJT pipes Qa1, NPN type BJT again
Qa2, NPN type BJT pipes Qa3, NPN type BJT pipes Qa4, resistance Ra1, resistance Ra2, resistance Ra3, resistance Ra4, resistance Ra5, resistance
Ra6 is constituted.
As shown in figure 3, input capacitance Ci one end simultaneously with AC power vac anode, resistance R4 one end, positive-negative-positive
BJT pipes Q1 emitter stage, positive-negative-positive BJT pipes Q5 emitter stage, NPN type BJT pipes Q3 emitter stage and resistance R2 one end phase
Even, positive-negative-positive BJT pipes Q1 colelctor electrode simultaneously with resistance R3 one end, resistance R6 one end, positive-negative-positive BJT pipes Q2 colelctor electrode,
Diode D1 negative electrode and inductance L1 one end are connected, diode D1 anode one end simultaneously with output capacitance Co, output
Voltage Vo anode and load Z1 one end and be connected, it is output capacitance Co other end negative terminal simultaneously with output voltage Vo, negative
The colelctor electrode for carrying the Z1 other end, the inductance L1 other end, NPN type BJT pipes Q3 colelctor electrode and NPN type BJT pipes Q4 is connected,
NPN type BJT pipes Q4 emitter stage simultaneously with resistance R5 one end, positive-negative-positive BJT pipes Q6 emitter stage, positive-negative-positive BJT pipes Q2 hair
Emitter-base bandgap grading, resistance R1 one end, the input capacitance Ci other end and AC power vac negative terminal are connected, NPN type BJT types Q3's
Base stage is connected with the resistance R1 other end, and NPN type BJT pipes Q4 base stage is connected with the resistance R4 other end, positive-negative-positive BJT pipes Q5
Base stage be connected simultaneously with the resistance R2 other end and the resistance R3 other end, positive-negative-positive BJT pipes Q6 base stage is while and resistance
The R5 other end and the resistance R6 other end are connected, the colelctor electrode of positive-negative-positive BJT pipes Q1 base stage simultaneously with positive-negative-positive BJT pipes Q5
And controlled current source group M1 port a is connected, positive-negative-positive BJT pipes Q2 base stage simultaneously with positive-negative-positive BJT pipes Q6 colelctor electrode with
And controlled current source group M1 port b is connected, NPN type BJT pipes Qa1 current collection extremely controlled current source group M1 port a, NPN
Type BJT pipes Qa3 current collection extremely controlled current source group M1 port b, NPN type BJT pipes Qa1 emitter stage simultaneously with resistance Ra2
One end and resistance Ra3 one end be connected, NPN type BJT pipes Qa2 base stage is connected with the resistance Ra2 other end, NPN type BJT
Pipe Qa2 colelctor electrode is connected with NPN type BJT pipes Qa1 base stage and resistance Ra1 one end simultaneously, the resistance Ra1 other end and
AC power vac anode is connected, NPN type BJT pipes Qa3 emitter stage simultaneously with resistance Ra5 one end and resistance Ra6 one
End is connected, and NPN type BJT pipes Qa4 base stage is connected with the resistance Ra5 other end, NPN type BJT pipes Qa4 colelctor electrode and meanwhile with
NPN type BJT pipes Qa3 base stage and resistance Ra4 one end are connected, the resistance Ra4 other end and AC power vac negative terminal phase
Even, NPN type BJT pipes Qa2 emitter stage simultaneously with the resistance Ra3 other end, the resistance Ra6 other end, NPN type BJT pipes Qa4
Emitter stage and output voltage Vo negative terminal are connected.
Fig. 5 is the simulation work oscillogram of the embodiment of the present invention 1, and Fig. 6 is that the simulation work waveform of the embodiment of the present invention 1 is thin
Section figure, its steady operation principle is as follows：
Work as vac>When 0, AC power vac is in positive half cycle (i.e. ta1<t<ta2)；Work as vac<When 0, at AC power vac
In negative half period (i.e. ta2<t<ta3).Q4 in the conducting of AC power vac positive half cycles, negative half period cut-off, Q3 in AC power vac just
Half cycle cut-off, negative half period conducting.
(1) in the positive half cycles of AC power vac, Q2 cut-offs, Q1 self-excitations work
(the ta11 when Q1 is turned on<t<Ta12), vac, Q1, L1, Q4 constitute loop, and L1 magnetizes, input current iac, electricity
Inducing current iL1, Q1 collector current iQc1 increase.With iQc1 increase, Q5's and controlled current source group M1 port a
The lower Q1 of effect working condition gradually from saturation region to amplification region, cut-off region transfer.In Q1 cut-off shape is had just enter into from conducting state
At the time of state,
Wherein max () is takes max function, and VBE_Qa1 is Qa1 base-emitter conduction voltage drop, and VBE_Qa2 is
Qa2 base-emitter conduction voltage drop, β _ Qa1 is Qa1 common emitter current gain, and β _ Q1 is Q1 common emitter electric current
Gain.(the ta12 when Q1 ends<t<Ta13), L1, Co, Z1, D1 constitute loop, and L1 puts magnetic, inductive current iL1 and diode
Electric current iD1 reduces.When iD1 is decreased to zero, D1 cut-offs, Q1 is turned on, gone round and begun again again.
(2) in AC power vac negative half periods, Q1 cut-offs, Q2 self-excitations work
Similarly, when Q2 is turned on, vac, Q2, L1, Q3 constitute loop, and L1 magnetizes, and input current iac reversely increases, inductance
Electric current iL1 and Q2 collector current iQc2 then positive increases.With iQc2 increase, in Q6 and controlled current source group M1 ports
In the presence of b Q2 working condition gradually from saturation region to amplification region, cut-off region transfer.In Q2 cut-off is had just enter into from conducting state
At the time of state,
Wherein max () is takes max function, and VBE_Qa3 is Qa3 base-emitter conduction voltage drop, and VBE_Qa4 is
Qa4 base-emitter conduction voltage drop, β _ Qa3 is Qa3 common emitter current gain, and β _ Q2 is Q2 common emitter electric current
Gain.When Q2 ends, L1, Co, Z1, D1 constitute loop, and L1 puts magnetic, and inductive current iL1 and diode current iD1 reduce.
When iD1 is decreased to zero, D1 cut-offs, Q2 is turned on, gone round and begun again again.
From the foregoing, the input current iac of the embodiment of the present invention 1 peak value is limited by controlled current source group M1.
Embodiment 2：Reference picture 1, Fig. 4, Fig. 7 and Fig. 8, the embodiment of the present invention 2 have output voltage stabilizing function, and it is by input electricity
Hold Ci, positive-negative-positive BJT pipes Q1, positive-negative-positive BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, positive-negative-positive BJT pipes Q5, positive-negative-positive
BJT pipes Q6, diode D1, inductance L1, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6,
Controlled current source group M1 is constituted.Wherein, controlled current source group M1 is again by NPN type BJT pipes Qb1, NPN type BJT pipes Qb2, NPN type
BJT pipes Qb3, NPN type BJT pipes Qb4, diode Db1, diode Db2, resistance Rb1, resistance Rb2, resistance Rb3, resistance Rb4, electricity
Hinder Rb5, resistance Rb6, resistance Rb7, resistance Rb8, electric capacity Cb1 compositions.
As shown in figure 4, input capacitance Ci one end simultaneously with AC power vac anode, resistance R4 one end, positive-negative-positive
BJT pipes Q1 emitter stage, positive-negative-positive BJT pipes Q5 emitter stage, NPN type BJT pipes Q3 emitter stage and resistance R2 one end phase
Even, positive-negative-positive BJT pipes Q1 colelctor electrode simultaneously with resistance R3 one end, resistance R6 one end, positive-negative-positive BJT pipes Q2 colelctor electrode,
Diode D1 negative electrode and inductance L1 one end are connected, diode D1 anode one end simultaneously with output capacitance Co, output
Voltage Vo anode and load Z1 one end and be connected, it is output capacitance Co other end negative terminal simultaneously with output voltage Vo, negative
The colelctor electrode for carrying the Z1 other end, the inductance L1 other end, NPN type BJT pipes Q3 colelctor electrode and NPN type BJT pipes Q4 is connected,
NPN type BJT pipes Q4 emitter stage simultaneously with resistance R5 one end, positive-negative-positive BJT pipes Q6 emitter stage, positive-negative-positive BJT pipes Q2 hair
Emitter-base bandgap grading, resistance R1 one end, the input capacitance Ci other end and AC power vac negative terminal are connected, NPN type BJT types Q3's
Base stage is connected with the resistance R1 other end, and NPN type BJT pipes Q4 base stage is connected with the resistance R4 other end, positive-negative-positive BJT pipes Q5
Base stage be connected simultaneously with the resistance R2 other end and the resistance R3 other end, positive-negative-positive BJT pipes Q6 base stage is while and resistance
The R5 other end and the resistance R6 other end are connected, the colelctor electrode of positive-negative-positive BJT pipes Q1 base stage simultaneously with positive-negative-positive BJT pipes Q5
And controlled current source group M1 port a is connected, positive-negative-positive BJT pipes Q2 base stage simultaneously with positive-negative-positive BJT pipes Q6 colelctor electrode with
And controlled current source group M1 port b is connected, NPN type BJT pipes Qa1 current collection extremely controlled current source group M1 port a, resistance
Rb3 one end is controlled current source group M1 port a, and resistance Rb6 one end is controlled current source group M1 port b, resistance Rb3
The other end be connected with NPN type BJT pipes Qb1 colelctor electrode, NPN type BJT pipes Qb1 base stage simultaneously with resistance Rb2 one end with
And diode Db1 negative electrode is connected, resistance Rb2 other end one end simultaneously with resistance Rb1 and NPN type BJT pipes Qb2 collection
Electrode is connected, the anode, NPN type BJT pipes Qb3 emitter stage and two poles of the resistance Rb1 other end simultaneously with AC power vac
Pipe Db2 anode is connected, and the resistance Rb6 other end is connected with NPN type BJT pipes Qb3 colelctor electrode, NPN type BJT pipes Qb3 base
Pole is connected with resistance Rb5 one end and diode Db2 negative electrode simultaneously, the resistance Rb5 other end simultaneously with resistance Rb4 one
End and NPN type BJT pipes Qb4 colelctor electrode are connected, resistance Rb4 other end negative terminal simultaneously with AC power vac, NPN type
BJT pipes Qb1 emitter stage and diode Db1 anode are connected, and NPN type BJT pipes Qb2 base stage is managed with NPN type BJT simultaneously
Qb4 base stage, electric capacity Cb1 one end, resistance Rb8 one end and resistance Rb7 one end are connected, and the resistance Rb7 other end is same
When with output voltage Vo anode, the electric capacity Cb1 other end, NPN type BJT pipes Qb2 emitter stage and NPN type BJT pipes Qb4
Emitter stage is connected, and the resistance Rb8 other end is connected with output voltage Vo negative terminal.
Fig. 7 is the simulation work oscillogram of the embodiment of the present invention 2, and Fig. 8 is that the simulation work waveform of the embodiment of the present invention 2 is thin
Section figure, its steady operation principle is as follows：
Work as vac>When 0, AC power vac is in positive half cycle (i.e. tb1<t<tb2)；Work as vac<When 0, at AC power vac
In negative half period (i.e. tb2<t<tb3).Q4 in the conducting of AC power vac positive half cycles, negative half period cut-off, Q3 in AC power vac just
Half cycle cut-off, negative half period conducting.
(1) in AC power vac negative half periods, Q1 cut-offs, Q2 self-excitations work
(the tb21 when Q2 is turned on<t<Tb22), vac, Q2, L1, Q3 constitute loop, and L1 magnetizes, and input current iac is reverse
Increase, inductive current iL1 and Q2 collector current iQc2 then positive increases.With iQc2 increase, in Q6 and controlled current flow
In the presence of the b of source group M1 ports Q2 working condition gradually from saturation region to amplification region, cut-off region transfer.When Q2 ends (
tb22<t<Tb23), L1, Co, Z1, D1 constitute loop, and L1 puts magnetic, and inductive current iL1 and diode current iD1 reduce.When
ID1 is decreased to zero, D1 cut-offs, and Q2 is turned on, gone round and begun again again.
VBE_Qb is Qb4 and Qb2 base-emitter conduction voltage drop.WhenWhen,
Controlled current source group M1 reduces Q2 base current by port b, shortens Q2 ON time, or even when extending Q2 shut-off
Between so that | Vo | fall after rise.WhenWhen, controlled current source group M1 is maximized by port b
Q2 base current, maximizes Q2 ON time so that | Vo | go up.
(2) in the positive half cycles of AC power vac, Q2 cut-offs, Q1 self-excitations work
Similarly, when Q1 is turned on, vac, Q1, L1, Q4 constitute loop, and L1 magnetizes, input current iac, inductive current iL1,
Q1 collector current iQc1 increases.With iQc1 increase, the Q1 work in the presence of Q5 and controlled current source group M1 port a
Make state gradually from saturation region to amplification region, cut-off region transfer.When Q1 ends, L1, Co, Z1, D1 constitute loop, and L1 puts magnetic,
Inductive current iL1 and diode current iD1 reduce.When iD1 is decreased to zero, D1 cut-offs, Q1 is turned on, gone round and begun again again.
VBE_Qb is Qb2 and Qb4 base-emitter conduction voltage drop.WhenWhen,
Controlled current source group M1 reduces Q1 base current by port a, shortens Q1 ON time, or even when extending Q1 shut-off
Between so that | Vo | fall after rise.WhenWhen, controlled current source group M1 is maximized by port a
Q1 base current, maximizes Q1 ON time so that | Vo | go up.
From the foregoing, the output voltage Vo of the embodiment of the present invention 2 can be achieved surely under controlled current source group M1 regulation
It is fixed.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Being not construed as of scope is only limitted to the concrete form that embodiment is stated, protection scope of the present invention is also and in this area skill
Art personnel according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (4)
1. a kind of auto-excitation type BJT types are without bridge Buck-Boost PFC rectification circuits, it is characterised in that：Including input capacitance Ci, PNP
Type BJT pipes Q1, positive-negative-positive BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, positive-negative-positive BJT pipes Q5, positive-negative-positive BJT pipes Q6, two
Pole pipe D1, inductance L1, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and for passing through
Port a control positive-negative-positive BJT pipes Q1 base current is so as to realize the control to positive-negative-positive BJT pipe Q1 working conditions and by end
Mouth b control positive-negative-positive BJT pipes Q2 base current is so as to realize the controlled current source of the control to positive-negative-positive BJT pipe Q2 working conditions
Group M1, input capacitance Ci one end simultaneously with AC power vac anode, resistance R4 one end, positive-negative-positive BJT pipes Q1 transmitting
Pole, positive-negative-positive BJT pipes Q5 emitter stage, NPN type BJT pipes Q3 emitter stage and resistance R2 one end are connected, positive-negative-positive BJT pipes Q1
Colelctor electrode simultaneously with resistance R3 one end, resistance R6 one end, positive-negative-positive BJT pipes Q2 colelctor electrode, diode D1 negative electrode with
And inductance L1 one end is connected, diode D1 anode simultaneously with output capacitance Co one end, output voltage Vo anode and
The one end for loading Z1 is connected, output capacitance Co other end negative terminal simultaneously with output voltage Vo, the other end, the inductance for loading Z1
The colelctor electrode of the L1 other end, NPN type BJT pipes Q3 colelctor electrode and NPN type BJT pipes Q4 is connected, NPN type BJT pipes Q4 hair
Emitter-base bandgap grading simultaneously with resistance R5 one end, positive-negative-positive BJT pipes Q6 emitter stage, positive-negative-positive BJT pipes Q2 emitter stage, resistance R1 one
End, the input capacitance Ci other end and AC power vac negative terminal are connected, and NPN type BJT types Q3 base stage is another with resistance R1's
One end is connected, and NPN type BJT pipes Q4 base stage is connected with the resistance R4 other end, and positive-negative-positive BJT pipes Q5 base stage is while and resistance
The R2 other end and the resistance R3 other end are connected, the other end and electricity of positive-negative-positive BJT pipes Q6 base stage simultaneously with resistance R5
The other end for hindering R6 is connected, the colelctor electrode and controlled current source group of positive-negative-positive BJT pipes Q1 base stage simultaneously with positive-negative-positive BJT pipes Q5
M1 port a is connected, the colelctor electrode and controlled current source group M1 of positive-negative-positive BJT pipes Q2 base stage simultaneously with positive-negative-positive BJT pipes Q6
Port b be connected.
2. auto-excitation type BJT types as claimed in claim 1 are without bridge Buck-Boost PFC rectification circuits, it is characterised in that：Resistance
R1 two ends parallel connection speed-up capacitor C1, resistance R3 two ends parallel connection speed-up capacitor C2, resistance R4 two ends parallel connection speed-up capacitor C3, resistance R6
Two ends parallel connection speed-up capacitor C4.
3. auto-excitation type BJT types as claimed in claim 1 or 2 are without bridge Buck-Boost PFC rectification circuits, it is characterised in that：Institute
State controlled current source group M1 including NPN type BJT pipes Qa1, NPN type BJT pipes Qa2, NPN type BJT pipes Qa3, NPN type BJT pipes Qa4,
Resistance Ra1, resistance Ra2, resistance Ra3, resistance Ra4, resistance Ra5 and resistance Ra6, NPN type BJT pipes Qa1 current collection are extremely controlled
Current source group M1 port a, NPN type BJT pipes Qa3 current collection extremely controlled current source group M1 port b, NPN type BJT pipes Qa1
Emitter stage be connected simultaneously with resistance Ra2 one end and resistance Ra3 one end, NPN type BJT pipes Qa2 base stage and resistance Ra2
The other end be connected, NPN type BJT pipes Qa2 colelctor electrode base stage simultaneously with NPN type BJT pipes Qa1 and resistance Ra1 one end
It is connected, the resistance Ra1 other end is connected with AC power vac anode, NPN type BJT pipes Qa3 emitter stage is while and resistance
Ra5 one end and resistance Ra6 one end are connected, and NPN type BJT pipes Qa4 base stage is connected with the resistance Ra5 other end, NPN type
BJT pipes Qa4 colelctor electrode is connected with NPN type BJT pipes Qa3 base stage and resistance Ra4 one end simultaneously, and resistance Ra4's is another
End is connected with AC power vac negative terminal, and NPN type BJT pipes Qa2 emitter stage is while the other end, resistance Ra6 with resistance Ra3
The other end, NPN type BJT pipes Qa4 emitter stage and output voltage Vo negative terminal is connected.
4. auto-excitation type BJT types as claimed in claim 1 or 2 are without bridge Buck-Boost PFC rectification circuits, it is characterised in that：Institute
State controlled current source group M1 including NPN type BJT pipes Qb1, NPN type BJT pipes Qb2, NPN type BJT pipes Qb3, NPN type BJT pipes Qb4,
Diode Db1, diode Db2, resistance Rb1, resistance Rb2, resistance Rb3, resistance Rb4, resistance Rb5, resistance Rb6, resistance Rb7,
Resistance Rb8 and electric capacity Cb1, resistance Rb3 one end are controlled current source group M1 port a, and resistance Rb6 one end is controlled current flow
Source group M1 port b, resistance the Rb3 other end are connected with NPN type BJT pipes Qb1 colelctor electrode, NPN type BJT pipes Qb1 base stage
Be connected simultaneously with resistance Rb2 one end and diode Db1 negative electrode, the resistance Rb2 other end is while one end with resistance Rb1
And NPN type BJT pipes Qb2 colelctor electrode is connected, anode, the NPN type BJT of the resistance Rb1 other end simultaneously with AC power vac
Pipe Qb3 emitter stage and diode Db2 anode are connected, the colelctor electrode phase of resistance the Rb6 other end and NPN type BJT pipes Qb3
Even, NPN type BJT pipes Qb3 base stage is connected with resistance Rb5 one end and diode Db2 negative electrode simultaneously, and resistance Rb5's is another
One end is connected with resistance Rb4 one end and NPN type BJT pipes Qb4 colelctor electrode simultaneously, the resistance Rb4 other end simultaneously with friendship
The anode for flowing power supply vac negative terminal, NPN type BJT pipes Qb1 emitter stage and diode Db1 is connected, NPN type BJT pipes Qb2's
One end phase of base stage simultaneously with NPN type BJT pipes Qb4 base stage, electric capacity Cb1 one end, resistance Rb8 one end and resistance Rb7
Even, the resistance Rb7 other end simultaneously with output voltage Vo anode, the electric capacity Cb1 other end, NPN type BJT pipes Qb2 transmitting
Pole and NPN type BJT pipes Qb4 emitter stage are connected, and the resistance Rb8 other end is connected with output voltage Vo negative terminal.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769380A (en) * | 2012-05-17 | 2012-11-07 | 浙江工业大学 | BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by main switching tube |
| CN103986329A (en) * | 2014-06-10 | 2014-08-13 | 杭州钛丽能源科技有限公司 | Input adaptive self-excited Cuk transformer |
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| US20070109826A1 (en) * | 2005-11-15 | 2007-05-17 | Chao-Cheng Lu | Lus semiconductor and synchronous rectifier circuits |
| US20090284303A1 (en) * | 2008-05-16 | 2009-11-19 | Zong Bo Hu | Control circuits and methods for controlling switching devices |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769380A (en) * | 2012-05-17 | 2012-11-07 | 浙江工业大学 | BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by main switching tube |
| CN103986329A (en) * | 2014-06-10 | 2014-08-13 | 杭州钛丽能源科技有限公司 | Input adaptive self-excited Cuk transformer |
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