CN205336138U

CN205336138U - Two boost voltage -multiplying PFC converters of high efficiency

Info

Publication number: CN205336138U
Application number: CN201520868586.3U
Authority: CN
Inventors: 杜贵平; 柳志飞; 杜发达
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2015-11-01
Filing date: 2015-11-01
Publication date: 2016-06-22
Anticipated expiration: 2025-11-01

Abstract

The utility model discloses a two boost voltage -multiplying PFC converters of high efficiency does not take anti -parallel diode's IGBT, two diodes, two electric capacity to constitute by an inductance, two, the one end and the one end of inputing the alternating voltage source of inductance are connected, the other end of inductance respectively with a IGBT's collecting electrode, the 2nd IGBT's projecting pole, the positive pole of first diode, the negative pole of second diode is connected, the other end in input alternating voltage source respectively with the projecting pole of IGBT pipe, the collecting electrode of the 2nd IGBT pipe, the negative pole of first electric capacity, the anodal of second electric capacity is connected, the positive pole of first electric capacity, the negative pole of first diode is connected with the one end of load, the negative pole of second electric capacity, the positive pole of second diode is connected with the other end of load. The utility model discloses topological structure is simple, and voltage gain is high, and is efficient, can realize exchanging the operation of the side power factor of unit.

Description

The double; two Boost multiplication of voltage pfc converter of a kind of high efficiency

Technical field

This utility model relates to AC/DC and converts field, particularly relates to the double; two Boost multiplication of voltage circuit of power factor correction of a kind of high efficiency。

Background technology

Current substantial amounts of use bridge-type uncontrollable rectifier not only causes serious harmonic pollution to electrical network, and the waste that also result in electric energy on the low side of AC side Power Factor。Power factor correction technology is capable of ac-side current and follows the tracks of AC voltage, it is possible to improve the power factor of AC。

The input voltage of traditional single phase boost pfc circuit is general higher just can obtain sufficiently high output voltage, if relatively low being necessary for of input voltage requires that boost inductance increases, which results in the increase of the volume of system and loss。Insider proposes multiplication of voltage BoostPFC changer with regard to this, but switching device used by traditional multiplication of voltage BoostPFC changer too much causes efficiency on the low side。

In order to solve above-mentioned problem, the utility model proposes the double; two Boost multiplication of voltage pfc converter of a kind of high efficiency。

Utility model content

The problem such as big for existing multiplication of voltage BoostPFC inverter power loss, efficiency is on the low side, the purpose of this utility model is in that double; two Boost multiplication of voltage pfc circuits of a kind of simple in construction, can reduce circuit loss, improves conversion efficiency。

In order to reach objectives stated above, this utility model adopts the following technical scheme that。

The double, two Boost multiplication of voltage pfc converter of a kind of high efficiency, by an inductance, two IGBT without anti-paralleled diode, two diodes, two electric capacity compositions, one end of described inductance is connected with the one end in input ac voltage source, the other end of inductance respectively with the colelctor electrode of an IGBT, the emitter stage of the 2nd IGBT, the anode of the first diode, the negative electrode of the second diode connects, the other end in input ac voltage source respectively with the emitter stage of an IGBT, the colelctor electrode of the 2nd IGBT, the negative pole of the first electric capacity, the positive pole of the second electric capacity connects, the positive pole of the first electric capacity, the negative electrode of the first diode is connected with one end of load, the negative pole of the second electric capacity, the anode of the second diode is connected with the other end of load。

Further, when input ac voltage source Vin is when positive half cycle, bear forward voltage between the collector and emitter of the oneth IGBT pipe, controlled its turn-on and turn-off by given signal, bear backward voltage between the collector and emitter of the 2nd IGBT pipe and turn off；When being operated in positive half period, alternating-current voltage source, inductance, an IGBT pipe, the first diode, the first electric capacity collectively constitute a Boost circuit。

Further, when input ac voltage source is when negative half period, bear forward voltage between the collector and emitter of the 2nd IGBT pipe, controlled its turn-on and turn-off by given signal, bear backward voltage between the collector and emitter of an IGBT pipe and turn off；When being operated in negative half-cycle, alternating-current voltage source, inductance, the 2nd IGBT pipe, the second diode, the second electric capacity collectively constitute another Boost circuit。

Further, the first electric capacity and the second capacitance parameter is identical and the sufficiently large voltage stabilization that ensure that the first electric capacity, the second electric capacity two ends, the output DC voltage at load two ends is the first electric capacity both end voltage and the sum of the second electric capacity both end voltage。

Compared with prior art, the beneficial effects of the utility model have:

1, efficiency of transmission is high。This utility model adopts two antiparallel IGBT pipes to be operated in the positive-negative half-cycle of input ac power respectively, and each half cycle can be considered as a Boost circuit。Adopt the IGBT without anti-paralleled diode, only one of which switch device conductive in the induction charging loop of power supply positive-negative half-cycle, also only one of which switch device conductive in the inductive discharge loop of power supply positive-negative half-cycle, loss is greatly lowered, and overall efficiency is improved。

2, circuit structure is simple, stable。This utility model is compared with traditional multiplication of voltage BoostPFC changer, eliminating an inductance and two diodes, and adopt the IGBT without parallel diode, circuit structure is simple, and avoid 2 inductance parameters and run according to system and change and cause fluctuation, circuit runs more stable。

3, voltage gain is high。This utility model is compared traditional pfc circuit and is had higher voltage gain。

Accompanying drawing explanation

Fig. 1 is the double; two Boost multiplication of voltage pfc converter structure chart of a kind of high efficiency of the present utility model；

Fig. 2 a, Fig. 2 b are operating diagram when the oneth IGBT pipe turns on and off when the positive half cycle of input voltage of the circuit shown in Fig. 1 respectively；

Fig. 3 a, Fig. 3 b are operating diagram when the 2nd IGBT pipe turns on and off when input voltage negative half period of the circuit shown in Fig. 1 respectively；

Fig. 4 is the oscillogram that experiment obtains AC input ac voltage and electric current；

Fig. 5 Fig. 5 a ~ Fig. 5 c is that experiment obtains load voltage Uo, the first electric capacity C1 two ends DC voltage Uo1 and the oscillogram of the second electric capacity C2 two ends DC voltage Uo2 respectively。

Detailed description of the invention

Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail explanation, but embodiment of the present utility model is not limited to this。If it is noted that the following process having not detailed description especially or parameter, being all that those skilled in the art can refer to existing techniques in realizing。

As shown in Figure 1, the double, two Boost multiplication of voltage pfc converter of a kind of high efficiency, by an inductance L, two IGBT(S1-S2 without anti-paralleled diode), two diodes (D1-D2), two electric capacity (C1-C2) compositions, one end of described inductance L is connected with one end of input ac voltage source Vin, the other end of inductance L respectively with the colelctor electrode of an IGBTS1, the emitter stage of the 2nd IGBTS2, the anode of the first diode D1, the negative electrode of the second diode D2 connects, the other end of input ac voltage source Vin respectively with the emitter stage of an IGBTS1, the colelctor electrode of the 2nd IGBTS2, the negative pole of the first electric capacity C1, the positive pole of the second electric capacity C2 connects, the positive pole of the first electric capacity C1, the negative electrode of the first diode D1 is connected with one end of load R, the negative pole of the second electric capacity C2, the anode of the second diode D2 is connected with the other end of load R。

Such as Fig. 2 a ~ 2b, when input ac voltage source Vin is when positive half cycle, bear forward voltage between the collector and emitter of the oneth IGBT pipe S1, controlled its turn-on and turn-off by given signal, bear backward voltage between the collector and emitter of the 2nd IGBT pipe S2 and turn off；When being operated in positive half period, alternating-current voltage source Vin, inductance L, an IGBT pipe S1, the first diode D1, the first electric capacity C1 collectively constitute a Boost circuit。When controlling an IGBT pipe S1 conducting, inductance L forward is charged energy storage by input ac voltage source Vin, and load R is discharged by the first electric capacity C1 and the second electric capacity C2。When controlling an IGBT pipe S1 and turning off, input ac voltage source Vin, inductance L, the first diode D1, the first electric capacity C1 and the second electric capacity C2 and load R form path, and now the first electric capacity C1 is charged, and the second electric capacity C2 discharges。Requirement according to output DC voltage U0 adjusts the turn-on and turn-off time of an IGBT pipe S1。

Such as Fig. 3 a ~ 3b, when input ac voltage source Vin is when negative half period, bear forward voltage between the collector and emitter of the 2nd IGBT pipe S2, controlled its turn-on and turn-off by given signal, bear backward voltage between the collector and emitter of an IGBT pipe S1 and turn off；When being operated in negative half-cycle, alternating-current voltage source Vin, inductance L, the 2nd IGBT pipe S2, the second diode D2, the second electric capacity C2 collectively constitute another Boost circuit。When controlling the 2nd IGBT pipe S2 conducting, inductance L is reversed charging energy-storing by input ac voltage source Vin, and load R is discharged by the first electric capacity C1 and the second electric capacity C2。When controlling the 2nd IGBT pipe S2 and turning off, input ac voltage source Vin, inductance L, the second diode D2, the first electric capacity C1 and the second electric capacity C2 and load R form path, and now the second electric capacity C2 is charged, and the first electric capacity C1 discharges。Requirement according to output DC voltage U0 adjusts the turn-on and turn-off time of the 2nd IGBT pipe S2。

Such as Fig. 4, experiment parameter is: input ac power Vin=220V/50HZ, inductance L=3mH, output Pout=1kW, electric capacity C1=C2=1000 μ F, and output voltage Uo=400V, IGBT switching frequency fs=50HZ, IGBT select the FGW40N120H of Infineon。Experimental verification this utility model AC input current follows the tracks of input voltage, it may be achieved unity power factor runs, and current harmonics is little。

Such as Fig. 5 a ~ Fig. 5 c, under same experiment parameter, obtain the first electric capacity C1 two ends DC voltage Uo1 and the second electric capacity C2 two ends DC voltage Uo2, can be seen that the two voltage stabilization, ripple is little, and load voltage Uo is the first electric capacity C1 two ends DC voltage Uo1 and the sum of the second electric capacity C2 two ends DC voltage Uo2。

Those skilled in the art this specific embodiment is made various amendment under the principle of the present utility model premise with essence or can supplement or adopt similar mode to substitute, but these changes each fall within protection domain of the present utility model。Therefore this utility model technical scope is not limited to above-described embodiment。

Claims

1. the double, two Boost multiplication of voltage pfc converter of high efficiency, it is characterized in that, by an inductance (L), two IGBT(S1-S2), two diodes (D1-D2), two electric capacity (C1-C2) compositions, one end of described inductance (L) is connected with the one end of input ac voltage source (Vin), the other end of inductance (L) respectively with an IGBT(S1) colelctor electrode, 2nd IGBT(S2) emitter stage, the anode of the first diode (D1), the negative electrode of the second diode (D2) connects, the other end in input ac voltage source (Vin) respectively with an IGBT(S1) emitter stage, 2nd IGBT(S2) colelctor electrode, the negative pole of the first electric capacity (C1), the positive pole of the second electric capacity (C2) connects, the positive pole of the first electric capacity (C1), the negative electrode of the first diode (D1) is connected with one end of load (R), the negative pole of the second electric capacity (C2), the anode of the second diode (D2) is connected with the other end of load (R)。

2. the double; two Boost multiplication of voltage pfc converter of a kind of high efficiency according to claim 1, it is characterised in that said two IGBT is the IGBT without anti-paralleled diode。