CN105141150B - Auto-excitation type BJT types are without bridge Cuk PFC rectification circuits - Google Patents
Auto-excitation type BJT types are without bridge Cuk PFC rectification circuits Download PDFInfo
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Abstract
A kind of auto-excitation type BJT types are without bridge Cuk PFC rectification circuits, including input capacitance Ci, NPN type BJT pipes Q1, NPN type BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, NPN type BJT pipes Q5, NPN type BJT pipes Q6, NPN type BJT pipes Q7, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8, inductance L1, inductance L2, inductance L3, electric capacity Cs, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7 and controlled current source group M1.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, exchange input, the high-quality transformation of electrical energy occasion of direct current output are applied to, such as：
Micro-energy collection system, grid-connected power generation system, battery charging system, LED illumination System etc., especially one kind is without bridge Cuk
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 Cuk PFC rectification circuits are a kind of PFC rectification circuits, and its main circuit is general to be cascaded by bridge rectifier
Cuk circuits are formed.In order to reduce the loss of bridge rectifier, arisen at the historic moment without bridge Cuk PFC rectification circuits.Without bridge Cuk
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, switching loss higher, 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 Cuk PFC rectification circuits
Use MOSFET.But, MOSFET is voltage mode driver part, compared with current mode drive device BJT, the drive circuit of MOSFET
Drive circuit than BJT is more complicated.Especially in the working environment of ultralow pressure or 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 Cuk PFC rectification circuits are complicated, drive efficiency compared with
Low, self-starting poor-performing deficiency, the present invention provide a kind of simplified driving circuit structure, drive efficiency it is higher, while obtaining
The auto-excitation type BJT types of the performance of easy self-starting are without bridge Cuk 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 Cuk PFC rectification circuits, including input capacitance Ci, NPN type BJT pipes Q1, NPN type
BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, NPN type BJT pipes Q5, NPN type BJT pipes Q6, NPN type BJT pipes Q7, two poles
Pipe D1, diode D2, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8, inductance L1, electricity
Sense L2, inductance L3, electric capacity Cs, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance
R7 and for controlling the base current of NPN type BJT pipes Q1 by port a so as to realize the control to NPN type BJT pipe Q1 working conditions
Make and the base current of NPN type BJT pipes Q2 is controlled so as to realize the control to NPN type BJT pipe Q2 working conditions by port b
And the base current of NPN type BJT pipes Q5 is controlled so as to realize to the control of NPN type BJT pipe Q5 working conditions by port c
One end of controlled current source group M1, input capacitance Ci one end simultaneously with AC power vac, one end of resistance R1, inductance L1
The anode of one end and diode D7 is connected, the other end of inductance L1 colelctor electrode, diode D1 simultaneously with NPN type BJT pipes Q1
The anode of negative electrode, one end of resistance R3 and diode D3 be connected, the negative electrode of diode D3 is simultaneously with NPN type BJT pipes Q5's
One end of colelctor electrode, the negative electrode of diode D4 and electric capacity Cs is connected, the other end of electric capacity Cs anode simultaneously with diode D5
And the negative electrode of diode D6 is connected, the anode of diode D6 is connected with one end of inductance L3, the other end of inductance L3 and meanwhile with
One end of one end of output capacitance Co, the anode of output voltage Vo and load Z1 is connected, load the other end of Z1 simultaneously with it is defeated
Go out negative terminal, the other end of output capacitance Co, the negative electrode of diode D5, emitter stage, the NPN type of NPN type BJT pipes Q5 of voltage Vo
The emitter stage of BJT pipes Q6, the emitter stage of NPN type BJT pipes Q7, one end of resistance R5, one end of resistance R6, NPN type BJT pipes Q1
Emitter stage, the emitter stage of NPN type BJT pipes Q2, the emitter stage of NPN type BJT pipes Q3, emitter stage, the diode of NPN type BJT pipes Q4
The anode of D1 and the anode of diode D2 are connected, the base stage of the NPN type BJT pipes Q1 other end, NPN type simultaneously with resistance R1
The colelctor electrode of BJT pipes Q3 and the port a of controlled current source group M1 are connected, and the base stage of NPN type BJT pipes Q3 is simultaneously with resistance R3's
The base stage of the other end, the other end of resistance R5 and NPN type BJT pipes Q6 is connected, the colelctor electrode of NPN type BJT pipes Q6 simultaneously with electricity
Hinder the base stage phase of one end, the port c of controlled current source group M1, the colelctor electrode of NPN type BJT pipes Q7 and the NPN type BJT pipes Q5 of R7
Even, the other end of resistance R7 is connected with the negative electrode of diode D7 and the negative electrode of diode D8 simultaneously, and input capacitance Ci's is another
Anode of the end simultaneously with the other end of AC power vac, one end of resistance R2, one end of inductance L2 and diode D8 is connected,
The other end of inductance L2 colelctor electrode simultaneously with NPN type BJT pipes Q2, the negative electrode of diode D2, one end of resistance R4 and two poles
The anode of pipe D4 is connected, the base stage of NPN type BJT pipes Q2 simultaneously with the other end of resistance R2, the colelctor electrode of NPN type BJT pipes Q4 with
And the port b of controlled current source group M1 is connected, the base stage of the NPN type BJT pipes Q4 other end simultaneously with resistance R4, resistance R6 it is another
The base stage of one end and NPN type BJT pipes Q7 is connected.
Further, resistance R1 two ends parallel connection speed-up capacitor C1, resistance R2 two ends parallel connection speed-up capacitor C2, resistance R3 two ends are simultaneously
Connection speed-up capacitor C3, resistance R4 two ends parallel connection speed-up capacitor C4, resistance R7 two ends speed-up capacitor C5 in parallel.The preferred scheme can add
The speed dynamic characteristic of the auto-excitation type BJT types without bridge Cuk 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, resistance Ra1, resistance Ra2, resistance Ra3, resistance Ra4, resistance Ra5, resistance Ra6, resistance Ra7, resistance Ra8 and resistance Ra9,
One end of resistance Ra3 is the port a of controlled current source group M1, and one end of resistance Ra6 is the port b of controlled current source group M1, electricity
The one end for hindering Ra9 is the port c of controlled current source group M1, the other end of resistance Ra3 and the colelctor electrode phase of NPN type BJT pipes Qa1
Even, the base stage of NPN type BJT pipes Qa1 is connected with one end of resistance Ra1 and one end of resistance Ra2 simultaneously, and resistance Ra1's is another
End is connected with one end of AC power vac, and the other end of resistance Ra6 is connected with the colelctor electrode of NPN type BJT pipes Qa2, NPN type BJT
The base stage of pipe Qa2 is connected with one end of resistance Ra4 and one end of resistance Ra5 simultaneously, the other end and AC power of resistance Ra4
The other end of vac is connected, and the other end of resistance Ra9 is connected with the colelctor electrode of NPN type BJT pipes Qa3, the base of NPN type BJT pipes Qa3
Pole is connected with one end of resistance Ra7 and one end of resistance Ra8 simultaneously, the other end of resistance Ra7 and the negative electrode phase of diode D8
Even, the emitter stage of NPN type BJT pipes Qa1 emitter stage, emitter stage, the electricity of NPN type BJT pipes Qa3 simultaneously with NPN type BJT pipes Qa2
The negative terminal for hindering the other end, the other end of resistance Ra5, the other end of resistance Ra8 and the output voltage Vo of Ra2 is connected.It is described from
Swash formula BJT types has input voltage feed forward function without bridge Cuk 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, resistance Rb1, resistance Rb2, resistance Rb3, resistance Rb4, resistance Rb5 and electric capacity Cb1, one end of resistance Rb1 is controlled current flow
One end of the port a of source group M1, resistance Rb2 are the port b of controlled current source group M1, and one end of resistance Rb3 is controlled current source
The port c of group M1, the other end of resistance Rb1 is connected with the colelctor electrode of NPN type BJT pipes Qb1, the other end and NPN type of resistance Rb2
The colelctor electrode of BJT pipes Qb2 is connected, and the other end of resistance Rb3 is connected with the colelctor electrode of NPN type BJT pipes Qb3, NPN type BJT pipes Qb1
Base stage simultaneously with the base stage of NPN type BJT pipes Qb2, the base stage of NPN type BJT pipes Qb3, one end of electric capacity Cb1, resistance Rb4 one
One end of end and resistance Rb5 are connected, and the other end of electric capacity Cb1 just with the other end, the output voltage Vo of resistance Rb5 simultaneously
The emitter stage at end, the emitter stage of NPN type BJT pipes Qb1, the emitter stage of NPN type BJT pipes Qb2 and NPN type BJT pipes Qb3 is connected,
The other end of resistance Rb4 is connected with the negative terminal of output voltage Vo.The auto-excitation type BJT types have without bridge Cuk PFC rectification circuits
Output voltage stabilizing function.
Technology design of the invention is：With the development of novel semiconductor material device, the BJT of new material (such as SiC) is
Show less drive loss, faster very low resistance coefficient, 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 Cuk 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.Without bridge Cuk PFC
Wholly-controled device in rectification circuit uses BJT, can in fact using the advantage and utilization self-excited circuit technology of BJT service behaviours simultaneously
The performances such as existing circuit is simple, high efficiency, easy self-starting.
Beneficial effects of the present invention are mainly manifested in：Auto-excitation type BJT types have alternating current without bridge Cuk PFC rectification circuits
Can in high quality be converted into the ability of direct current energy, and the absolute value of output DC voltage can be more than, less than or equal to defeated
Enter the amplitude of alternating 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 the electrical block diagram after the present invention accelerates 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.
Specific 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 Cuk PFC rectification circuits, including input capacitance Ci, NPN type
BJT pipes Q1, NPN type BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, NPN type BJT pipes Q5, NPN type BJT pipes Q6, NPN
Type BJT pipes Q7, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, diode D7, two poles
Pipe D8, inductance L1, inductance L2, inductance L3, electric capacity Cs, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance
R5, resistance R6, resistance R7 and for controlling the base current of NPN type BJT pipes Q1 by port a so as to realize managing NPN type BJT
The control of Q1 working conditions and the base current of NPN type BJT pipes Q2 is controlled so as to realize to NPN type BJT pipes Q2 by port b
The control of working condition and the base current of NPN type BJT pipes Q5 is controlled so as to realize to NPN type BJT pipe Q5 works by port c
Make the control of state controlled current source group M1, input capacitance Ci one end simultaneously with one end of AC power vac, resistance R1
The anode of one end, one end of inductance L1 and diode D7 is connected, the other end of inductance L1 collection simultaneously with NPN type BJT pipes Q1
The anode of electrode, the negative electrode of diode D1, one end of resistance R3 and diode D3 is connected, the negative electrode of diode D3 simultaneously with
One end of the colelctor electrode, the negative electrode of diode D4 and electric capacity Cs of NPN type BJT pipes Q5 is connected, the other end of electric capacity Cs simultaneously with
The anode of diode D5 and the negative electrode of diode D6 are connected, and the anode of diode D6 is connected with one end of inductance L3, inductance L3
One end simultaneously with one end of output capacitance Co, the anode of output voltage Vo and load Z1 of the other end be connected, load Z1's
The other end simultaneously with the negative terminal of output voltage Vo, the other end of output capacitance Co, the negative electrode of diode D5, NPN type BJT pipes Q5
Emitter stage, the emitter stage of NPN type BJT pipes Q6, the emitter stage of NPN type BJT pipes Q7, one end of resistance R5, one end of resistance R6,
The emitter stage of NPN type BJT pipes Q1, the emitter stage of NPN type BJT pipes Q2, the emitter stage of NPN type BJT pipes Q3, NPN type BJT pipes Q4
The anode of emitter stage, the anode of diode D1 and diode D2 is connected, and the base stage of NPN type BJT pipes Q1 is simultaneously with resistance R1's
The port a of the other end, the colelctor electrode of NPN type BJT pipes Q3 and controlled current source group M1 is connected, and the base stage of NPN type BJT pipes Q3 is same
When be connected with the base stage of the other end, the other end of resistance R5 and NPN type BJT pipes Q6 of resistance R3, the collection of NPN type BJT pipes Q6
Electrode simultaneously with one end of resistance R7, the port c of controlled current source group M1, the colelctor electrode of NPN type BJT pipes Q7 and NPN type BJT
The base stage of pipe Q5 is connected, and the other end of resistance R7 is connected with the negative electrode of diode D7 and the negative electrode of diode D8 simultaneously, is input into
The other end of the electric capacity Ci other end simultaneously with AC power vac, one end of resistance R2, one end of inductance L2 and diode D8
Anode be connected, the other end of inductance L2 colelctor electrode, the negative electrode of diode D2, the one of resistance R4 simultaneously with NPN type BJT pipes Q2
The anode of end and diode D4 is connected, the base stage of the NPN type BJT pipes Q2 other end, NPN type BJT pipes Q4 simultaneously with resistance R2
Colelctor electrode and the port b of controlled current source group M1 be connected, the base stage of the NPN type BJT pipes Q4 other end simultaneously with resistance R4,
The other end of resistance R6 and the base stage of NPN type BJT pipes Q7 are connected.
Further, resistance R1 two ends parallel connection speed-up capacitor C1, resistance R2 two ends parallel connection speed-up capacitor C2, resistance R3 two ends are simultaneously
Connection speed-up capacitor C3, resistance R4 two ends parallel connection speed-up capacitor C4, resistance R7 two ends speed-up capacitor C5 in parallel.The preferred scheme can add
The speed dynamic characteristic of the auto-excitation type BJT types without bridge Cuk PFC rectification circuits.
Embodiment 1：Reference picture 1, Fig. 3, Fig. 5 and Fig. 6, the embodiment of the present invention 1 has input voltage feed forward function, and it is by defeated
Enter electric capacity Ci, NPN type BJT pipes Q1, NPN type BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, NPN type BJT pipes Q5, NPN
Type BJT pipes Q6, NPN type BJT pipes Q7, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6,
Diode D7, diode D8, inductance L1, inductance L2, inductance L3, electric capacity Cs, output capacitance Co, resistance R1, resistance R2, resistance
R3, resistance R4, resistance R5, resistance R6, resistance R7, controlled current source group M1 compositions.Wherein, controlled current source M1 is again by NPN type
BJT pipes Qa1, NPN type BJT pipes Qa2, NPN type BJT pipes Qa3, resistance Ra1, resistance Ra2, resistance Ra3, resistance Ra4, resistance Ra5,
Resistance Ra6, resistance Ra7, resistance Ra8, resistance Ra9 compositions.
As shown in figure 3, one end of input capacitance Ci one end, one end of resistance R1, inductance L1 simultaneously with AC power vac
One end and the anode of diode D7 be connected, the other end of inductance L1 colelctor electrode, diode simultaneously with NPN type BJT pipes Q1
The anode of the negative electrode, one end of resistance R3 and diode D3 of D1 is connected, the negative electrode of diode D3 simultaneously with NPN type BJT pipes Q5
One end of colelctor electrode, the negative electrode of diode D4 and electric capacity Cs be connected, the other end of electric capacity Cs sun simultaneously with diode D5
The negative electrode of pole and diode D6 is connected, and the anode of diode D6 is connected with one end of inductance L3, and the other end of inductance L3 is simultaneously
One end of one end, the anode of output voltage Vo with output capacitance Co and load Z1 are connected, load the other end of Z1 and meanwhile with
The negative terminal of output voltage Vo, the other end of output capacitance Co, the negative electrode of diode D5, emitter stage, the NPN type of NPN type BJT pipes Q5
The emitter stage of BJT pipes Q6, the emitter stage of NPN type BJT pipes Q7, one end of resistance R5, one end of resistance R6, NPN type BJT pipes Q1
Emitter stage, the emitter stage of NPN type BJT pipes Q2, the emitter stage of NPN type BJT pipes Q3, emitter stage, the diode of NPN type BJT pipes Q4
The anode of D1 and the anode of diode D2 are connected, the base stage of the NPN type BJT pipes Q1 other end, NPN type simultaneously with resistance R1
The colelctor electrode of BJT pipes Q3 and the port a of controlled current source group M1 are connected, and the base stage of NPN type BJT pipes Q3 is simultaneously with resistance R3's
The base stage of the other end, the other end of resistance R5 and NPN type BJT pipes Q6 is connected, the colelctor electrode of NPN type BJT pipes Q6 simultaneously with electricity
Hinder the base stage phase of one end, the port c of controlled current source group M1, the colelctor electrode of NPN type BJT pipes Q7 and the NPN type BJT pipes Q5 of R7
Even, the other end of resistance R7 is connected with the negative electrode of diode D7 and the negative electrode of diode D8 simultaneously, and input capacitance Ci's is another
Anode of the end simultaneously with the other end of AC power vac, one end of resistance R2, one end of inductance L2 and diode D8 is connected,
The other end of inductance L2 colelctor electrode simultaneously with NPN type BJT pipes Q2, the negative electrode of diode D2, one end of resistance R4 and two poles
The anode of pipe D4 is connected, the base stage of NPN type BJT pipes Q2 simultaneously with the other end of resistance R2, the colelctor electrode of NPN type BJT pipes Q4 with
And the port b of controlled current source group M1 is connected, the base stage of the NPN type BJT pipes Q4 other end simultaneously with resistance R4, resistance R6 it is another
The base stage of one end and NPN type BJT pipes Q7 is connected, and one end of resistance Ra3 is the port a of controlled current source group M1, resistance Ra6's
One end is the port b of controlled current source group M1, and one end of resistance Ra9 is the port c of controlled current source group M1, and resistance Ra3's is another
One end is connected with the colelctor electrode of NPN type BJT pipes Qa1, the base stage of NPN type BJT pipes Qa1 one end simultaneously with resistance Ra1 and electricity
The one end for hindering Ra2 is connected, and the other end of resistance Ra1 is connected with one end of AC power vac, the other end and NPN type of resistance Ra6
The colelctor electrode of BJT pipes Qa2 is connected, the base stage of NPN type BJT pipes Qa2 one end and one end of resistance Ra5 simultaneously with resistance Ra4
It is connected, the other end of resistance Ra4 is connected with the other end of AC power vac, the other end and the NPN type BJT pipes Qa3 of resistance Ra9
Colelctor electrode be connected, the base stage of NPN type BJT pipes Qa3 is connected with one end of resistance Ra7 and one end of resistance Ra8 simultaneously, resistance
The other end of Ra7 is connected with the negative electrode of diode D8, the emitter stage of NPN type BJT pipes Qa1 hair simultaneously with NPN type BJT pipes Qa2
Emitter-base bandgap grading, the emitter stage of NPN type BJT pipes Qa3, the other end of resistance Ra2, the other end of resistance Ra5, resistance Ra8 the other end with
And the negative terminal of output voltage Vo is 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)., in the positive half cycle conductings of AC power vac, negative half period cut-off, D1 and D8 are in alternating current for D2 and D7
The positive half cycle cut-offs of source vac, negative half period conducting.
(1) in the positive half cycles of AC power vac, Q2 and D4 ends, Q1 and Q5 self-excitations work
(the ta11 when Q1 and Q5 is turned on<t<Ta12), vac, L1, Q1, D2, L2 constitute first loop, vac, L1,
D3, Q5, D2, L2 constitute second loop, and Cs, Q5, Co, Z1, L3, D6 constitute the 3rd loop, and L1, L2, L3 magnetize, inductance
The collector current iQc5 of collector current iQc1, Q5 of electric current iL1, Q1 of L1, the electric current iL3 of inductance L3 increase.With
The increase of iQc1, in the presence of Q3 and controlled current source group M1 port a the working condition of Q1 gradually from saturation region to amplification region,
Cut-off region is shifted.Meanwhile, the working condition of Q5 is gradually from saturation region to putting in the presence of Q6 and controlled current source group M1 port c
Great Qu, cut-off region transfer.When Q1 has just enter into cut-off state from conducting state, it is assumed that the collector current of L1=L2 and Q1
iQc1>>The electric current iD3 of D3, ifThenIfThen
Wherein VBE_Qa1 for Qa1 base-emitter conduction voltage drop, β _ Qa1 for Qa1 common emitter current gain, β _
Q1 is the common emitter current gain of Q1.(the ta12 when Q1 and Q5 ends<t<Ta13), vac, L1, D3, Cs, D5, D2, L2
A loop is constituted, L3, D6, D5, Co, Z1 constitute another loop, and L1, L2, L3 put magnetic, the electric current iL1 of inductance L1, inductance
The electric current iL3 of L3, the electric current iD5 of diode D5 reduce.When iD5 is decreased to zero, D5 cut-offs, Q1 and Q5 turn on again, week and
Renew.
(2) in AC power vac negative half periods, Q1 and D3 ends, Q2 and Q5 self-excitations work
Similarly, when Q2 and Q5 is turned on, vac, L2, Q2, D1, L1 constitute first loop, vac, L2, D4, Q5, D1, L1
Second loop is constituted, Cs, Q5, Co, Z1, L3, D6 constitute the 3rd loop, and L1 and L2 reversely magnetize, and L3 magnetizes, inductance L1's
Electric current iL1 reversely increases, and the collector current iQc5 of collector current iQc2, Q5 of Q2, the electric current iL3 of inductance L3 increase.
With the increase of iQc2, the working condition of Q2 is gradually from saturation region to putting in the presence of Q4 and controlled current source group M1 port b
Great Qu, cut-off region transfer.Meanwhile, the working condition of Q5 is gradually from saturation in the presence of Q7 and controlled current source group M1 port c
Shifted to amplification region, cut-off region in area.When Q2 has just enter into cut-off state from conducting state, it is assumed that the current collection of L1=L2 and Q2
Electrode current iQc2>>The electric current iD4 of D4, ifThenIfThen
Wherein VBE_Qa2 for Qa2 base-emitter conduction voltage drop, β _ Qa2 for Qa2 common emitter current gain, β _
Q2 is the common emitter current gain of Q2.When Q2 and Q5 ends, one loop of vac, L2, D4, Cs, D5, D1, L1 composition, L3,
D6, D5, Co, Z1 constitute another loop, and L1 and L2 reversely puts magnetic, and L3 puts magnetic, and the electric current iL1 of inductance L1 reversely reduces, inductance
The electric current iD5 of the electric current iL3 and diode D5 of L3 reduces.When iD5 is decreased to zero, D5 cut-offs, Q2 and Q5 turn on again, week and
Renew.
From the foregoing, the current peak of the inductance L1 of the embodiment of the present invention 1 is relevant with input ac voltage.
Embodiment 2：Reference picture 1, Fig. 4, Fig. 7 and Fig. 8, the embodiment of the present invention 2 has output voltage stabilizing function, and it is by input electricity
Hold Ci, NPN type BJT pipes Q1, NPN type BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, NPN type BJT pipes Q5, NPN type
BJT pipes Q6, NPN type BJT pipes Q7, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, two
Pole pipe D7, diode D8, inductance L1, inductance L2, inductance L3, electric capacity Cs, output capacitance Co, resistance R1, resistance R2, resistance R3,
Resistance R4, resistance R5, resistance R6, resistance R7, controlled current source group M1 compositions.Wherein, controlled current source group M1 is again by NPN type
BJT pipes Qb1, NPN type BJT pipes Qb2, NPN type BJT pipes Qb3, resistance Rb1, resistance Rb2, resistance Rb3, resistance Rb4, resistance Rb5,
Electric capacity Cb1 is constituted.
As shown in figure 4, one end of input capacitance Ci one end, one end of resistance R1, inductance L1 simultaneously with AC power vac
One end and the anode of diode D7 be connected, the other end of inductance L1 colelctor electrode, diode simultaneously with NPN type BJT pipes Q1
The anode of the negative electrode, one end of resistance R3 and diode D3 of D1 is connected, the negative electrode of diode D3 simultaneously with NPN type BJT pipes Q5
One end of colelctor electrode, the negative electrode of diode D4 and electric capacity Cs be connected, the other end of electric capacity Cs sun simultaneously with diode D5
The negative electrode of pole and diode D6 is connected, and the anode of diode D6 is connected with one end of inductance L3, and the other end of inductance L3 is simultaneously
One end of one end, the anode of output voltage Vo with output capacitance Co and load Z1 are connected, load the other end of Z1 and meanwhile with
The negative terminal of output voltage Vo, the other end of output capacitance Co, the negative electrode of diode D5, emitter stage, the NPN type of NPN type BJT pipes Q5
The emitter stage of BJT pipes Q6, the emitter stage of NPN type BJT pipes Q7, one end of resistance R5, one end of resistance R6, NPN type BJT pipes Q1
Emitter stage, the emitter stage of NPN type BJT pipes Q2, the emitter stage of NPN type BJT pipes Q3, emitter stage, the diode of NPN type BJT pipes Q4
The anode of D1 and the anode of diode D2 are connected, the base stage of the NPN type BJT pipes Q1 other end, NPN type simultaneously with resistance R1
The colelctor electrode of BJT pipes Q3 and the port a of controlled current source group M1 are connected, and the base stage of NPN type BJT pipes Q3 is simultaneously with resistance R3's
The base stage of the other end, the other end of resistance R5 and NPN type BJT pipes Q6 is connected, the colelctor electrode of NPN type BJT pipes Q6 simultaneously with electricity
Hinder the base stage phase of one end, the port c of controlled current source group M1, the colelctor electrode of NPN type BJT pipes Q7 and the NPN type BJT pipes Q5 of R7
Even, the other end of resistance R7 is connected with the negative electrode of diode D7 and the negative electrode of diode D8 simultaneously, and input capacitance Ci's is another
Anode of the end simultaneously with the other end of AC power vac, one end of resistance R2, one end of inductance L2 and diode D8 is connected,
The other end of inductance L2 colelctor electrode simultaneously with NPN type BJT pipes Q2, the negative electrode of diode D2, one end of resistance R4 and two poles
The anode of pipe D4 is connected, the base stage of NPN type BJT pipes Q2 simultaneously with the other end of resistance R2, the colelctor electrode of NPN type BJT pipes Q4 with
And the port b of controlled current source group M1 is connected, the base stage of the NPN type BJT pipes Q4 other end simultaneously with resistance R4, resistance R6 it is another
The base stage of one end and NPN type BJT pipes Q7 is connected, and one end of resistance Rb1 is the port a of controlled current source group M1, resistance Rb2's
One end is the port b of controlled current source group M1, and one end of resistance Rb3 is the port c of controlled current source group M1, and resistance Rb1's is another
One end is connected with the colelctor electrode of NPN type BJT pipes Qb1, and the other end of resistance Rb2 is connected with the colelctor electrode of NPN type BJT pipes Qb2, electricity
The other end for hindering Rb3 is connected with the colelctor electrode of NPN type BJT pipes Qb3, and the base stage of NPN type BJT pipes Qb1 is managed with NPN type BJT simultaneously
One end phase of the base stage of Qb2, the base stage of NPN type BJT pipes Qb3, one end of electric capacity Cb1, one end of resistance Rb4 and resistance Rb5
Even, the other end of the electric capacity Cb1 other end, the anode of output voltage Vo, the transmitting of NPN type BJT pipes Qb1 simultaneously with resistance Rb5
The emitter stage of pole, the emitter stage of NPN type BJT pipes Qb2 and NPN type BJT pipes Qb3 is connected, the other end and the output electricity of resistance Rb4
The negative terminal of Vo is pressed to be 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)., in the positive half cycle conductings of AC power vac, negative half period cut-off, D1 and D8 are in alternating current for D2 and D7
The positive half cycle cut-offs of source vac, negative half period conducting.
(1) in AC power vac negative half periods, Q1 and D3 ends, Q2 and Q5 self-excitations work
(the tb21 when Q2 and Q5 is turned on<t<Tb22), vac, L2, Q2, D1, L1 constitute first loop, vac, L2,
D4, Q5, D1, L1 constitute second loop, and Cs, Q5, Co, Z1, L3, D6 constitute the 3rd loop, and L1 and L2 reversely magnetize, and L3 fills
Magnetic, the electric current iL1 of inductance L1 reversely increases, the collector current iQc5 of collector current iQc2, Q5 of Q2, the electric current of inductance L3
IL3 increases.With the increase of iQc2, in the presence of Q4 and controlled current source group M1 port b the working condition of Q2 gradually from
Shifted to amplification region, cut-off region saturation region.Meanwhile, the working condition of Q5 in the presence of Q7 and controlled current source group M1 port c
Gradually from saturation region to amplification region, cut-off region transfer.(the tb22 when Q2 and Q5 ends<t<Tb23), vac, L2, D4, Cs,
D5, D1, L1 constitute a loop, and L3, D6, D5, Co, Z1 constitute another loop, and L1 and L2 reversely puts magnetic, and L3 puts magnetic, inductance
The electric current iL1 of L1 reversely reduces, and the electric current iD5 of the electric current iL3 and diode D5 of inductance L3 reduces.When iD5 is decreased to zero, D5
Cut-off, Q2 and Q5 are turned on, gone round and begun again again.
VBE_Qb is the base-emitter conduction voltage drop of Qb2, Qb3, Qb1.When
When, controlled current source group M1 reduces the base current of Q2 and Q5 by port b and port c, shortens the ON time of Q2 and Q5, very
To the turn-off time for extending Q2 and Q5 so that Vo falls after rise.WhenWhen, controlled current source group
M1 maximizes the base current of Q2 and Q5 by port b and port c, maximizes the ON time of Q2 and Q5 so that Vo gos up.
(2) in the positive half cycles of AC power vac, Q2 and D4 ends, Q1 and Q5 self-excitations work
Similarly, when Q1 and Q5 is turned on, vac, L1, Q1, D2, L2 constitute first loop, vac, L1, D3, Q5, D2, L2
Second loop is constituted, Cs, Q5, Co, Z1, L3, D6 constitute the 3rd loop, and L1, L2, L3 magnetize, the electric current of inductance L1
The collector current iQc5 of collector current iQc1, Q5 of iL1, Q1, the electric current iL3 of inductance L3 increase.With the increasing of iQc1
Plus, in the presence of Q3 and controlled current source group M1 port a the working condition of Q1 gradually from saturation region to amplification region, cut-off region turn
Move.When Q1 and Q5 ends, vac, L1, D3, Cs, D5, D2, L2 constitute a loop, and L3, D6, D5, Co, Z1 constitute another
Loop, L1, L2, L3 put magnetic, and the electric current iL1 of inductance L1, the electric current iL3 of inductance L3, the electric current iD5 of diode D5 reduce.
When iD5 is decreased to zero, D5 cut-offs, Q1 and Q5 are turned on, gone round and begun again again.
VBE_Qb is the base-emitter conduction voltage drop of Qb1, Qb2, Qb3.When
When, controlled current source group M1 reduces the base current of Q1 and Q5 by port a and port c, shortens the ON time of Q1 and Q5, very
To the turn-off time for extending Q1 and Q5 so that Vo falls after rise.WhenWhen, controlled current source group
M1 maximizes the base current of Q1 and Q5 by port a and port c, maximizes the ON time of Q1 and Q5 so that Vo gos up.
From the foregoing, the output voltage Vo of the embodiment of the present invention 2 is capable of achieving surely under the regulation of controlled current source group M1
It is fixed.Especially in the case of underloading, in the presence of controlled current source group M1, the embodiment of the present invention 2 will work in an intermittent fashion.
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 Cuk PFC rectification circuits, it is characterised in that：Including input capacitance Ci, NPN type BJT pipe
Q1, NPN type BJT pipes Q2, NPN type BJT pipes Q3, NPN type BJT pipes Q4, NPN type BJT pipes Q5, NPN type BJT pipes Q6, NPN type BJT
Pipe Q7, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8,
Inductance L1, inductance L2, inductance L3, electric capacity Cs, output capacitance Co, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electricity
Hinder R6, resistance R7 and for controlling the base current of NPN type BJT pipes Q1 by port a so as to realize to NPN type BJT pipe Q1 works
Make the control of state and the base current of NPN type BJT pipes Q2 is controlled so as to realize working NPN type BJT pipes Q2 by port b
The control of state and the base current of NPN type BJT pipes Q5 is controlled so as to realize the shape that works NPN type BJT pipes Q5 by port c
One end of controlled current source the group M1, input capacitance Ci of the control of state one end, of resistance R1 simultaneously with AC power vac
End, the anode of one end of inductance L1 and diode D7 are connected, the other end of inductance L1 current collection simultaneously with NPN type BJT pipes Q1
The anode of pole, the negative electrode of diode D1, one end of resistance R3 and diode D3 is connected, and the negative electrode of diode D3 is while and NPN
One end of the colelctor electrode, the negative electrode of diode D4 and electric capacity Cs of type BJT pipes Q5 is connected, the other end of electric capacity Cs simultaneously with two poles
The anode of pipe D5 and the negative electrode of diode D6 are connected, and the anode of diode D6 is connected with one end of inductance L3, and inductance L3's is another
One end of one end one end, the anode of output voltage Vo and load Z1 simultaneously with output capacitance Co is connected, and load Z1's is another
End negative terminal, the other end of output capacitance Co, the negative electrode of diode D5, the transmitting of NPN type BJT pipes Q5 simultaneously with output voltage Vo
Pole, the emitter stage of NPN type BJT pipes Q6, emitter stage, one end of resistance R5, one end of resistance R6, the NPN type of NPN type BJT pipes Q7
The emitter stage of BJT pipes Q1, the emitter stage of NPN type BJT pipes Q2, the emitter stage of NPN type BJT pipes Q3, the transmitting of NPN type BJT pipes Q4
The anode of pole, the anode of diode D1 and diode D2 is connected, and the base stage of NPN type BJT pipes Q1 is simultaneously another with resistance R1
End, the port a of the colelctor electrode of NPN type BJT pipes Q3 and controlled current source group M1 are connected, the base stage of NPN type BJT pipes Q3 simultaneously with
The base stage of the other end, the other end of resistance R5 and NPN type BJT pipes Q6 of resistance R3 is connected, the colelctor electrode of NPN type BJT pipes Q6
While one end, the port c of controlled current source group M1, the colelctor electrode of NPN type BJT pipes Q7 and NPN type BJT pipes Q5 with resistance R7
Base stage be connected, the other end of resistance R7 is connected with the negative electrode of diode D7 and the negative electrode of diode D8 simultaneously, input capacitance
The other end of Ci is while the sun of the other end, one end of resistance R2, one end of inductance L2 and diode D8 with AC power vac
Extremely be connected, the other end of inductance L2 colelctor electrode simultaneously with NPN type BJT pipes Q2, the negative electrode of diode D2, resistance R4 one end with
And the anode of diode D4 is connected, the base stage of NPN type BJT pipes Q2 is while the collection of the other end, NPN type BJT pipes Q4 with resistance R2
The port b of electrode and controlled current source group M1 is connected, the base stage of the NPN type BJT pipes Q4 other end, resistance simultaneously with resistance R4
The other end of R6 and the base stage of NPN type BJT pipes Q7 are connected.
2. auto-excitation type BJT types as claimed in claim 1 are without bridge Cuk PFC rectification circuits, it is characterised in that：Resistance R1 two ends are simultaneously
Connection speed-up capacitor C1, resistance R2 two ends parallel connection speed-up capacitor C2, resistance R3 two ends parallel connection speed-up capacitor C3, resistance R4 two ends are in parallel
Speed-up capacitor C4, resistance R7 two ends speed-up capacitor C5 in parallel.
3. auto-excitation type BJT types as claimed in claim 1 or 2 are without bridge Cuk 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, resistance Ra1, resistance Ra2, resistance
Ra3, resistance Ra4, resistance Ra5, resistance Ra6, resistance Ra7, resistance Ra8 and resistance Ra9, one end of resistance Ra3 is controlled current flow
One end of the port a of source group M1, resistance Ra6 are the port b of controlled current source group M1, and one end of resistance Ra9 is controlled current source
The port c of group M1, the other end of resistance Ra3 is connected with the colelctor electrode of NPN type BJT pipes Qa1, and the base stage of NPN type BJT pipes Qa1 is same
When be connected with one end of resistance Ra1 and one end of resistance Ra2, the other end of resistance Ra1 and one end phase of AC power vac
Even, the other end of resistance Ra6 is connected with the colelctor electrode of NPN type BJT pipes Qa2, and the base stage of NPN type BJT pipes Qa2 is while and resistance
One end of Ra4 and one end of resistance Ra5 are connected, and the other end of resistance Ra4 is connected with the other end of AC power vac, resistance
The other end of Ra9 is connected with the colelctor electrode of NPN type BJT pipes Qa3, the base stage of NPN type BJT pipes Qa3 one end simultaneously with resistance Ra7
And one end of resistance Ra8 is connected, the other end of resistance Ra7 is connected with the negative electrode of diode D8, the transmitting of NPN type BJT pipes Qa1
Pole simultaneously with the emitter stage of NPN type BJT pipes Qa2, the emitter stage of NPN type BJT pipes Qa3, the other end of resistance Ra2, resistance Ra5
The negative terminal of the other end, the other end of resistance Ra8 and output voltage Vo is connected.
4. auto-excitation type BJT types as claimed in claim 1 or 2 are without bridge Cuk 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, resistance Rb1, resistance Rb2, resistance
Rb3, resistance Rb4, resistance Rb5 and electric capacity Cb1, one end of resistance Rb1 is the port a of controlled current source group M1, the one of resistance Rb2
It is the port b of controlled current source group M1 to hold, and one end of resistance Rb3 is the port c of controlled current source group M1, and resistance Rb1's is another
End is connected with the colelctor electrode of NPN type BJT pipes Qb1, and the other end of resistance Rb2 is connected with the colelctor electrode of NPN type BJT pipes Qb2, resistance
The other end of Rb3 is connected with the colelctor electrode of NPN type BJT pipes Qb3, the base stage of NPN type BJT pipes Qb1 simultaneously with NPN type BJT pipes Qb2
Base stage, the base stage of NPN type BJT pipes Qb3, one end of electric capacity Cb1, one end of one end of resistance Rb4 and resistance Rb5 be connected,
The other end of the electric capacity Cb1 other end simultaneously with resistance Rb5, the anode of output voltage Vo, the emitter stage of NPN type BJT pipes Qb1,
The emitter stage of NPN type BJT pipes Qb2 and the emitter stage of NPN type BJT pipes Qb3 are connected, the other end and output voltage of resistance Rb4
The negative terminal of Vo is connected.
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| CN102738880A (en) * | 2011-04-12 | 2012-10-17 | 台达电子工业股份有限公司 | Charging device of mobile vehicle |
| CN103066873A (en) * | 2013-01-21 | 2013-04-24 | 福州大学 | Novel voltage reduction type bridgeless Cuk power factor correction (PFC) circuit |
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| CN102738880A (en) * | 2011-04-12 | 2012-10-17 | 台达电子工业股份有限公司 | Charging device of mobile vehicle |
| CN103066873A (en) * | 2013-01-21 | 2013-04-24 | 福州大学 | Novel voltage reduction type bridgeless Cuk power factor correction (PFC) circuit |
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