CN105119506B - Auto-excitation type BJT types are without bridge Buck PFC rectification circuits - Google Patents
Auto-excitation type BJT types are without bridge Buck PFC rectification circuits Download PDFInfo
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Abstract
A kind of auto-excitation type BJT types are without bridge Buck 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 easy self-starting performance.
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
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 PFC rectification circuits are a kind of PFC rectification circuits, and its main circuit is typically cascaded by bridge rectifier
Buck circuits are formed.In order to reduce the loss of bridge rectifier, no bridge Buck PFC rectification circuits arise at the historic moment.Without bridge Buck
PFC rectification circuits mainly reach the purpose of lifting circuit efficiency by reducing the method for conduction device number in path.
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 is adopted mostly without the wholly-controled device in bridge Buck PFC rectification circuits
Use MOSFET.But, MOSFET is voltage mode driver part, compared with current mode drive device BJT, MOSFET drive circuit
Drive circuit than BJT is more complicated.Especially in ultralow pressure or the working environment of high pressure, the design of MOSFET drive circuits is difficult
Degree is quite big.
The content of the invention
To overcome existing MOSFET types without MOSFET drive circuits in bridge Buck PFC rectification circuits are complicated, drive efficiency compared with
Low, self-starting poor-performing deficiency, a kind of simplified driving circuit structure of present invention offer, drive efficiency are higher, obtain simultaneously
The auto-excitation type BJT types of easy self-starting performance are without bridge Buck 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 without bridge Buck 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 pass 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 control positive-negative-positive by port b
BJT pipes Q2 base current is so as to realize the controlled current source group M1 of the control to positive-negative-positive BJT pipe Q2 working conditions, and input is electric
Hold 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
One end of pipe Q5 emitter stage, NPN type BJT pipes Q3 emitter stage and resistance R2 is connected, and positive-negative-positive BJT pipes Q1 colelctor electrode is same
When 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 is connected, and the inductance L1 other end is simultaneously with output capacitance Co one end, output voltage Vo anode and loading the one of Z1
End is connected, negative terminal, the other end for loading Z1, the diode D1 sun of the output capacitance Co other end simultaneously with output voltage Vo
The colelctor electrode of pole, 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 preferred scheme accelerates the auto-excitation type BJT types without bridge Buck
The dynamic characteristic of 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 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, resistance Rb1, resistance Rb2, resistance Rb3, resistance Rb4, resistance Rb5, resistance Rb6, resistance Rb7, electricity
Rb8 and electric capacity Cb1 is hindered, 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, the resistance Rb3 other end is connected with NPN type BJT pipes Qb1 colelctor electrode, NPN type BJT pipes Qb1 base stage and
Resistance Rb2 one end is connected, resistance Rb2 other end one end simultaneously with resistance Rb1 and NPN type BJT pipes Qb2 colelctor electrode
It is connected, the resistance Rb1 other end is connected with AC power vac anode, the resistance Rb6 other end is with NPN type BJT pipes Qb3's
Colelctor electrode is connected, and NPN type BJT pipes Qb3 base stage is connected with resistance Rb5 one end, and the resistance Rb5 other end is while and resistance
Rb4 one end and NPN type BJT pipes Qb4 colelctor electrode are connected, the resistance Rb4 other end and AC power vac negative terminal phase
Even, 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 with
And resistance Rb7 one end is connected, the resistance Rb7 other end is connected with output voltage Vo anode, NPN type BJT pipes Qb1 transmitting
Emitter stage, the electricity of pole simultaneously with NPN type BJT pipes Qb3 emitter stage, NPN type BJT pipes Qb2 emitter stage, NPN type BJT pipes Qb4
The negative terminal for holding the Cb1 other end, the resistance Rb8 other end and output voltage Vo is connected.The auto-excitation type BJT types are without bridge Buck
PFC rectification circuits have output voltage stabilizing function.
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.Using new in middle low power is without bridge Buck PFC rectification circuits
The BJT of material, can not only obtain low-power consumption, but also can simplify the drive circuit of wholly-controled device.
BJT is used without the wholly-controled device in bridge Buck PFC rectification circuits, advantage and utilization using BJT service behaviours
Self-excited circuit technology can realize the performances such as simple circuit, high efficiency, easy self-starting simultaneously.
Beneficial effects of the present invention are mainly manifested in：Auto-excitation type BJT types have without bridge Buck PFC rectification circuits will exchange
Electric energy is converted into the ability of direct current energy in high quality, and output DC voltage value is less than the amplitude of input ac voltage, electricity
Road 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 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, two poles
Pipe D1, inductance L1, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and for pass through end
Mouth 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 port
B control positive-negative-positive BJT pipes Q2 base current is so as to realize the controlled current source group of the control to positive-negative-positive BJT pipe Q2 working conditions
M1, input capacitance Ci one end simultaneously with AC power vac anode, resistance R4 one end, positive-negative-positive BJT pipes Q1 emitter stage,
One end of positive-negative-positive BJT pipes Q5 emitter stage, NPN type BJT pipes Q3 emitter stage and resistance R2 is connected, positive-negative-positive BJT pipes Q1's
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 is connected, the inductance L1 other end simultaneously with output capacitance Co one end, output voltage Vo anode and negative
The one end for carrying Z1 is connected, output capacitance Co other end negative terminal simultaneously with output voltage Vo, the other end, the diode for loading Z1
The colelctor electrode of D1 anode, NPN type BJT pipes Q3 colelctor electrode and NPN type BJT pipes Q4 is connected, NPN type BJT pipes Q4 transmitting
Pole 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
End is connected, and NPN type BJT pipes Q4 base stage is connected with the resistance R4 other end, positive-negative-positive BJT pipes Q5 base stage and meanwhile with resistance R2
The other end and the resistance R3 other end be connected, the other end and resistance of positive-negative-positive BJT pipes Q6 base stage simultaneously with resistance R5
The R6 other end is connected, the colelctor electrode and controlled current source group M1 of positive-negative-positive BJT pipes Q1 base stage simultaneously with positive-negative-positive BJT pipes Q5
Port a be connected, positive-negative-positive BJT pipes Q2 base stage simultaneously with positive-negative-positive BJT pipes Q6 colelctor electrode and controlled current 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 preferred scheme accelerates the auto-excitation type BJT types without bridge Buck
The dynamic characteristic of 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, inductance L1 other end 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, diode D1 anode, 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, Co, Z1, Q4 constitute loop, and L1 magnetizes, input current
Iac, inductive current iL1, Q1 collector current iQc1 increase.With iQc1 increase, in Q5 and controlled current source group M1
In the presence of a of port Q1 working condition gradually from saturation region to amplification region, cut-off region transfer.Had just enter into Q1 from conducting state
At the time of cut-off 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, Co, Z1, Q3 constitute loop, and L1 magnetizes, and input current iac reversely increases
Plus, inductive current iL1 and Q2 collector current iQc2 then positive increases.With iQc2 increase, in Q6 and controlled current source
In the presence of group M1 port b Q2 working condition gradually from saturation region to amplification region, cut-off region transfer.It is firm from conducting state in Q2
At the time of into cut-off 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, resistance Rb1, resistance Rb2, resistance Rb3, resistance Rb4, resistance 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, inductance L1 other end 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, diode D1 anode, 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 simultaneously, and NPN type BJT pipes Q4 base stage is connected with the resistance R4 other end, positive-negative-positive BJT
Pipe Q5 base stage is connected with the resistance R2 other end and the resistance R3 other end simultaneously, positive-negative-positive BJT pipes Q6 base stage and meanwhile with
The resistance R5 other end and the resistance R6 other end are connected, the collection of positive-negative-positive BJT pipes Q1 base stage simultaneously with positive-negative-positive BJT pipes Q5
Electrode and controlled current source group M1 port a is connected, the current collection of positive-negative-positive BJT pipes Q2 base stage simultaneously with positive-negative-positive BJT pipes Q6
Pole and controlled current source group M1 port b are connected, and resistance Rb3 one end is controlled current source group M1 port a, resistance Rb6
One end be controlled current source group M1 port b, the resistance Rb3 other end is connected with NPN type BJT pipes Qb1 colelctor electrode, NPN
Type BJT pipes Qb1 base stage is connected with resistance Rb2 one end, resistance Rb2 other end one end simultaneously with resistance Rb1 and NPN
Type BJT pipes Qb2 colelctor electrode is connected, and the resistance Rb1 other end is connected with AC power vac anode, the resistance Rb6 other end
It is connected with NPN type BJT pipes Qb3 colelctor electrode, NPN type BJT pipes Qb3 base stage is connected with resistance Rb5 one end, resistance Rb5's
The other end is connected with resistance Rb4 one end and NPN type BJT pipes Qb4 colelctor electrode simultaneously, and the resistance Rb4 other end is with exchanging
Power supply vac negative terminal is 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 are connected, and the resistance Rb7 other end is connected with output voltage Vo anode, NPN
Emitter stage, NPN type BJT pipes Qb2 emitter stage, the NPN type BJT of type BJT pipes Qb1 emitter stage simultaneously with NPN type BJT pipes Qb3
Pipe Qb4 emitter stage, the electric capacity Cb1 other end, the resistance Rb8 other end and output voltage Vo negative terminal are connected.
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, Co, Z1, Q3 constitute loop, and L1 magnetizes, input current
Iac reversely increases, inductive current iL1 and Q2 collector current iQc2 then positive increases.With iQc2 increase, Q6 and by
Control the working condition of Q2 in the presence of current source group M1 port b gradually from saturation region to amplification region, cut-off region transfer.When Q2 cut-offs
When (tb22<t<Tb23), L1, Co, Z1, D1 constitute loop, and L1 puts magnetic, and inductive current iL1 and diode current iD1 subtract
It is small.When iD1 is decreased to zero, D1 cut-offs, 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 falls after rise.WhenWhen, controlled current source group M1 maximizes Q2's by port b
Base current, maximizes Q2 ON time so that Vo gos 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, Co, Z1, Q4 constitute loop, and L1 magnetizes, input current iac, inductance electricity
Flow iL1, Q1 collector current iQc1 increases.With iQc1 increase, in the presence of Q5 and controlled current source group M1 port a
Q1 working condition gradually from saturation region to amplification region, cut-off region transfer.When Q1 ends, L1, Co, Z1, D1 constitute loop, L1
Magnetic is put, inductive current iL1 and diode current iD1 reduce.When iD1 is decreased to zero, D1 cut-offs, Q1 is turned on again, Zhou Erfu
Begin.
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 falls after rise.WhenWhen, controlled current source group M1 maximizes Q1's by port a
Base current, maximizes Q1 ON time so that Vo gos 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 PFC rectification circuits, it is characterised in that：Including input capacitance Ci, positive-negative-positive BJT
Pipe 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 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 be controlled by port b
Positive-negative-positive BJT pipes Q2 processed base current so as to realize the controlled current source group M1 of the control to positive-negative-positive BJT pipe Q2 working conditions,
Input capacitance Ci one end simultaneously with AC power vac anode, resistance R4 one end, positive-negative-positive BJT pipes Q1 emitter stage, PNP
One end of type BJT pipes Q5 emitter stage, NPN type BJT pipes Q3 emitter stage and resistance R2 is connected, positive-negative-positive BJT pipes Q1 current collection
Pole 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 is connected, the inductance L1 other end simultaneously with output capacitance Co one end, output voltage Vo anode and load Z1
One end be connected, output capacitance Co other end negative terminal simultaneously with output voltage Vo, the other end for loading Z1, diode D1
The colelctor electrode of anode, NPN type BJT pipes Q3 colelctor electrode and NPN type BJT pipes Q4 is connected, and NPN type BJT pipes Q4 emitter stage is same
When 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, input
The electric capacity Ci other end and AC power vac negative terminal are connected, NPN type BJT types Q3 base stage and resistance R1 other end phase
Even, 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 another with resistance R2
One end and resistance R3 other end is connected, positive-negative-positive BJT pipes Q6 base stage simultaneously with the resistance R5 other end and resistance R6
The other end is connected, positive-negative-positive BJT pipes Q1 base stage colelctor electrode simultaneously with positive-negative-positive BJT pipes Q5 and controlled current source group M1 end
Mouthful a is connected, the colelctor electrode and controlled current source group M1 port b of positive-negative-positive BJT pipes Q2 base stage simultaneously with positive-negative-positive BJT pipes Q6
It is connected.
2. auto-excitation type BJT types as claimed in claim 1 are without bridge Buck PFC rectification circuits, it is characterised in that：Resistance R1 two ends
Speed-up capacitor C1 in parallel, resistance R3 two ends parallel connection speed-up capacitor C2, resistance R4 two ends parallel connection speed-up capacitor C3, resistance R6 two ends are simultaneously
Join speed-up capacitor C4.
3. auto-excitation type BJT types as claimed in claim 1 or 2 are without bridge Buck PFC rectification circuits, it is characterised in that：It is described 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 pipes Qa1 current collection extremely controlled current flow
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 hair
Emitter-base bandgap grading is connected with resistance Ra2 one end and resistance Ra3 one end simultaneously, and NPN type BJT pipes Qa2 base stage is another with resistance Ra2's
One end is connected, and NPN type BJT pipes Qa2 colelctor electrode is connected with NPN type BJT pipes Qa1 base stage and resistance Ra1 one end simultaneously,
The resistance Ra1 other end is connected with AC power vac anode, NPN type BJT pipes Qa3 emitter stage simultaneously with 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, the resistance Ra4 other end and friendship
The negative terminal for flowing power supply vac is connected, the NPN type BJT pipes Qa2 emitter stage other end simultaneously with resistance Ra3, resistance Ra6 it is another
The negative terminal at end, NPN type BJT pipes Qa4 emitter stage and output voltage Vo is connected.
4. auto-excitation type BJT types as claimed in claim 1 or 2 are without bridge Buck PFC rectification circuits, it is characterised in that：It is described 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, resistance
Rb1, resistance Rb2, resistance Rb3, resistance Rb4, resistance Rb5, resistance Rb6, resistance Rb7, resistance Rb8 and electric capacity Cb1, resistance Rb3
One end be controlled current source group M1 port a, resistance Rb6 one end is controlled current source group M1 port b, resistance Rb3's
The other end is connected with NPN type BJT pipes Qb1 colelctor electrode, and NPN type BJT pipes Qb1 base stage is connected with resistance Rb2 one end, resistance
The Rb2 other end is connected with resistance Rb1 one end and NPN type BJT pipes Qb2 colelctor electrode simultaneously, the resistance Rb1 other end and
AC power vac 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 stage is connected with resistance Rb5 one end, and the resistance Rb5 other end is managed with resistance Rb4 one end and NPN type BJT simultaneously
Qb4 colelctor electrode is connected, and the resistance Rb4 other end is connected with AC power vac negative terminal, and NPN type BJT pipes Qb2 base stage is same
When be connected with NPN type BJT pipes Qb4 base stage, electric capacity Cb1 one end, resistance Rb8 one end and resistance Rb7 one end, resistance
The Rb7 other end is connected with output voltage Vo anode, and NPN type BJT pipes Qb1 emitter stage is simultaneously with NPN type BJT pipes Qb3's
Emitter stage, NPN type BJT pipes Qb2 emitter stage, NPN type BJT pipes Qb4 emitter stage, the electric capacity Cb1 other end, resistance Rb8
The other end and output voltage Vo negative terminal are connected.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820784A (en) * | 2012-05-17 | 2012-12-12 | 浙江工业大学 | BJT (bipolar junction transistor)-type auto-excitation Buck converter with small main switching tube driving loss |
| CN205070824U (en) * | 2015-09-18 | 2016-03-02 | 浙江工业大学 | Auto -excitation type BJT type does not have bridge buck PFC rectifier circuit |
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| US6597210B2 (en) * | 2001-10-03 | 2003-07-22 | Bruce W. Carsten | Apparatus and method for control and driving BJT used as controlled rectifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820784A (en) * | 2012-05-17 | 2012-12-12 | 浙江工业大学 | BJT (bipolar junction transistor)-type auto-excitation Buck converter with small main switching tube driving loss |
| CN205070824U (en) * | 2015-09-18 | 2016-03-02 | 浙江工业大学 | Auto -excitation type BJT type does not have bridge buck PFC rectifier circuit |
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