CN104617794A - Switch power supply and rectifying circuit - Google Patents
Switch power supply and rectifying circuit Download PDFInfo
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- CN104617794A CN104617794A CN201510081181.XA CN201510081181A CN104617794A CN 104617794 A CN104617794 A CN 104617794A CN 201510081181 A CN201510081181 A CN 201510081181A CN 104617794 A CN104617794 A CN 104617794A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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Abstract
The invention discloses a switch power supply and a rectifying circuit. The rectifying circuit comprises a first controllable switching tube, a second controllable switching tube, a third controllable switching tube, a fourth controllable switching tube, a first sampling comparison module, a second sampling comparison module, a first driving module and a second driving module. The four controllable switching tubes are respectively provided with an internal equivalent diode or an anti-parallel diode. The two sampling comparison modules are respectively used for conducting sampling on the positive half circle voltage and the negative half circle voltage and conducting comparison on the sampling voltage of the positive half circle of an alternating current power supply and the reference voltage value. The first driving module is used for controlling the switch-off of the second controllable switching tube and the third controllable switching tube when the sampling voltage of the positive half circle of the alternating current power supply is smaller than the reference voltage value. The second driving module is used for controlling the switch-off of the first controllable switching tube and the fourth controllable switching tube when the sampling voltage of the positive half circle of the alternating current power supply is smaller than the reference voltage value, and controlling the switch-on of the first controllable switching tube and the fourth controllable switching tube when the sampling voltage of the positive half circle of the alternating current power supply is larger than the reference voltage value. The switch power supply can improve the switching efficiency of the alternating current power supply and is simple in the control method.
Description
Technical field
The present invention relates to voltage transitions field, particularly relate to a kind of Switching Power Supply and rectification circuit.
Background technology
Along with the development of science and technology, the power demand of power consumption equipment progressively increases, and the power output of single switch power supply is also at rapid growth, and conversion efficiency requires more and more higher.
As shown in Figure 1, diode rectifier bridge, as a kind of power component, realizes the alternating voltage of input to be converted into the direct voltage of output, can be applicable to variously possess AC rectifying installation.But, because the PN junction pressure drop of diode rectifier bridge is large, directly affect the conversion efficiency of power supply.For improving the conversion efficiency of power supply, what first people expected is carry out alternative PN junction diode bridge heap with metal-oxide-semiconductor, but for preventing bridge arm direct pass problem, control mode is often too complicated, lacks practicality and commerciality.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect that above-mentioned conversion efficiency is low or control mode is complicated of prior art, provide a kind of Switching Power Supply and rectification circuit, conversion efficiency is high and control mode is simple.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of rectification circuit, comprising:
There is the first controlled tr tube of equivalent diode or anti-paralleled diode in body respectively, second controlled tr tube, 3rd controlled tr tube and the 4th controlled tr tube, and, second end of the first controlled tr tube and the first end of the second controlled tr tube connect the first end of AC power respectively, second end of the 3rd controlled tr tube and the first end of the 4th controlled tr tube connect the second end of AC power respectively, second end of the second controlled tr tube and the second end of the 4th controlled tr tube are the first output of rectification circuit, the first end of the first controlled tr tube and the first end of the 3rd controlled tr tube are the second output of rectification circuit,
First sampling comparison module, for sampling to the positive half cycle voltage of AC power, and compares the sampled voltage of the positive half cycle of AC power and reference voltage value;
Second sampling comparison module, for sampling to the negative half period voltage of AC power, and compares the sampled voltage of the negative half period of AC power and reference voltage value;
First driver module, when sampled voltage for the positive half cycle in AC power is less than reference voltage value, control the second controlled tr tube and the shutoff of the 3rd controlled tr tube, when the sampled voltage of the positive half cycle of AC power is more than or equal to reference voltage value, control the second controlled tr tube and the 3rd controlled tr tube is open-minded;
Second driver module, when sampled voltage for the negative half period in AC power is less than reference voltage value, control the first controlled tr tube and the shutoff of the 4th controlled tr tube, when the sampled voltage of the negative half period of AC power is more than or equal to reference voltage value, control the first controlled tr tube and the 4th controlled tr tube is open-minded.
In rectification circuit of the present invention, described first controlled tr tube, the second controlled tr tube, the 3rd controlled tr tube and the 4th controlled tr tube are respectively triode, metal-oxide-semiconductor, thyristor.
In rectification circuit of the present invention, described first driver module, the second driver module are respectively half-bridge driven chip.
In rectification circuit of the present invention, described first driver module, the second driver module are respectively boostrap circuit.
In rectification circuit of the present invention, described first sampling comparison module comprises the first resistance, the 3rd resistance and the first comparator, wherein, the first end of the first resistance connects the first end of AC power, second end of the first resistance is by the 3rd grounding through resistance, the in-phase input end of the first comparator connects the second end of the first resistance, the anti-phase input termination reference voltage of the first comparator, the output of the first comparator connects the first control end of described first driver module and the second control end of described second driver module respectively;
Described second sampling comparison module comprises the 6th resistance, the 5th resistance and the second comparator, wherein, the first end of the 6th resistance connects the second end of AC power, second end of the 6th resistance is by the 5th grounding through resistance, the in-phase input end of the second comparator connects the second end of the 6th resistance, the anti-phase input termination reference voltage of the second comparator, the output of the second comparator connects the first control end of described second driver module and the second control end of described first driver module respectively.
In rectification circuit of the present invention, described first sampling comparison module also comprises the first diode, and the positive pole of described first diode connects the first end of AC power, and the negative pole of described first diode connects the first end of the first resistance;
Described second sampling comparison module also comprises the second diode, and the positive pole of described second diode connects the second end of AC power, and the negative pole of described second diode connects the first end of the 6th resistance.
The present invention also constructs a kind of Switching Power Supply, comprises above-described rectification circuit.
In Switching Power Supply of the present invention, also comprise the pfc circuit be connected with described rectification circuit.
In Switching Power Supply of the present invention, described pfc circuit comprises energy storage inductor, the 5th controlled tr tube, the 4th rectifier diode, electrochemical capacitor, wherein, the first end of described energy storage inductor connects the first output of described rectification circuit, second end of described energy storage inductor connects the first end of the 5th controlled tr tube and the positive pole of the 4th rectifier diode respectively, the negative pole of the 4th rectifier diode connects the anode of described electrochemical capacitor, the second end of described 5th controlled tr tube and the negative terminal of described electrochemical capacitor ground connection respectively.
Implement technical scheme of the present invention, when using this rectification circuit to carry out rectification to the voltage of AC power, at the low pressure stage of AC power, by respectively with the first controlled tr tube, the second controlled tr tube, the 3rd controlled tr tube, the antiparallel diode of the 4th controlled tr tube, or the bridge heap be made up of equivalent diode in the body of the first controlled tr tube, the second controlled tr tube, the 3rd controlled tr tube, the 4th controlled tr tube carries out rectification to alternating voltage; And by the first controlled tr tube, the second controlled tr tube, the 3rd controlled tr tube, the 4th controlled tr tube, rectification is carried out to alternating voltage at the high pressure section of AC power, therefore, can reduce because the PN junction of diode rectifier bridge is on the impact of AC power conversion efficiency, and, the conducting commutating period of controlled tr tube can be ensured, prevent the generation of bridge arm direct pass, thus make the control mode of controlled tr tube simple.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the circuit diagram of prior art breaker in middle power supply;
Fig. 2 is the logic diagram of rectification circuit embodiment one of the present invention;
Fig. 3 is the circuit diagram of Switching Power Supply embodiment one of the present invention;
Fig. 4 is the test waveform figure using the Switching Power Supply shown in Fig. 3 alternating voltage to be carried out to rectification.
Embodiment
Fig. 2 is the logic diagram of rectification circuit embodiment one of the present invention, and this rectification circuit includes: the first controlled tr tube Q1, the second controlled tr tube Q2, the 3rd controlled tr tube Q3, the 4th controlled tr tube Q4, the first sampling comparison module 11, second sampling comparison module 12, first driver module 21 and the second driver module 22.Wherein, first controlled tr tube Q1, second controlled tr tube Q2, 3rd controlled tr tube Q3, the equal inverse parallel of 4th controlled tr tube Q4 has diode (not shown), or, first controlled tr tube Q1, second controlled tr tube Q2, 3rd controlled tr tube Q3, 4th controlled tr tube Q4 all has equivalent diode in body, and, second end of the first controlled tr tube Q1 and the first end of the second controlled tr tube Q2 connect the first end (Live) of AC power respectively, second end of the 3rd controlled tr tube Q3 and the first end of the 4th controlled tr tube Q4 connect second end (Neutral) of AC power respectively, second end of the second controlled tr tube Q2 and second end of the 4th controlled tr tube Q4 are the first output of rectification circuit, the first end of the first controlled tr tube Q1 and the first end of the 3rd controlled tr tube Q3 are the second output of rectification circuit.In addition, the sampled voltage of the positive half cycle of AC power and reference voltage value for sampling to the positive half cycle voltage of AC power, and compare by the first sampling comparison module 11; The sampled voltage of the negative half period of AC power and reference voltage value for sampling to the negative half period voltage of AC power, and compare by the second sampling comparison module 12.When first driver module 21 is less than reference voltage value for the sampled voltage of the positive half cycle in AC power, control the second controlled tr tube Q2 and the 3rd controlled tr tube Q3 turns off, when the sampled voltage of the positive half cycle of AC power is more than or equal to reference voltage value, control the second controlled tr tube Q2 and the 3rd controlled tr tube Q3 is open-minded; When second driver module 22 is less than reference voltage value for the sampled voltage of the negative half period in AC power, control the first controlled tr tube Q1 and the 4th controlled tr tube Q4 turns off, when the sampled voltage of the negative half period of AC power is more than or equal to reference voltage value, control the first controlled tr tube Q1 and the 4th controlled tr tube Q4 is open-minded.
Introduce the operation principle of this rectification circuit below: after AC power powers on, when the first end (Live) of this AC power is high, its second end (Neutral) is for time low, namely, when the positive half cycle of AC power, the positive half cycle voltage of the first sampling comparison module 11 pairs of AC power is sampled, and the sampled voltage of the positive half cycle of AC power and reference voltage value is compared.When the instantaneous voltage of AC power is lower, the sampled voltage of the positive half cycle of AC power is less than reference voltage value, first driver module 21 controls the second controlled tr tube Q2 and the 3rd controlled tr tube Q3 turns off, now by respectively with the second controlled tr tube Q2 and the antiparallel diode of the 3rd controlled tr tube Q3, or, carry out rectification by the positive half cycle voltage of equivalent diode to AC power in the body of the second controlled tr tube Q2, the 3rd controlled tr tube Q3.When the instantaneous voltage of AC power is higher, the sampled voltage of the positive half cycle of AC power is more than or equal to reference voltage value, first driver module 21 controls the second controlled tr tube Q2 and the 3rd controlled tr tube Q3 is open-minded, now, rectification is carried out by the positive half cycle voltage of the second controlled tr tube Q2 and the 3rd controlled tr tube Q3 to AC power.
Similarly, when the first end (Live) of this AC power is for low, its second end (Neutral) is for time high, namely, when the negative half period of AC power, the negative half period voltage of the second sampling comparison module 12 pairs of AC power is sampled, and the sampled voltage of the negative half period of AC power and reference voltage value is compared.When the instantaneous voltage of AC power is lower, the sampled voltage of the negative half period of AC power is less than reference voltage value, second driver module 22 controls the first controlled tr tube Q1 and the 4th controlled tr tube Q4 turns off, now by respectively with the first controlled tr tube Q1 and the antiparallel diode of the 4th controlled tr tube Q4, or, carry out rectification by the negative half period voltage of equivalent diode to AC power in the body of the first controlled tr tube Q1, the 4th controlled tr tube Q4.When the instantaneous voltage of AC power is higher, the sampled voltage of the negative half period of AC power is more than or equal to reference voltage value, second driver module 22 controls the first controlled tr tube Q1 and the 4th controlled tr tube Q4 is open-minded, now, by the first controlled tr tube Q2 and the 4th controlled tr tube Q4, the negative half period voltage to AC power carries out rectification.
When using this rectification circuit to carry out rectification to the voltage of AC power, at the low pressure stage of AC power, by respectively with the first controlled tr tube Q1, the second controlled tr tube Q2, the 3rd controlled tr tube Q3, the antiparallel diode of the 4th controlled tr tube Q4, or the bridge heap be made up of equivalent diode in the body of the first controlled tr tube Q1, the second controlled tr tube Q2, the 3rd controlled tr tube Q3, the 4th controlled tr tube Q4 carries out rectification to alternating voltage; And at the high pressure section of AC power, by the first controlled tr tube Q1, the second controlled tr tube Q2, the 3rd controlled tr tube Q3, the 4th controlled tr tube Q4, rectification is carried out to alternating voltage, therefore, can reduce because the PN junction of diode rectifier bridge is on the impact of AC power conversion efficiency, and, the conducting commutating period of controlled tr tube can be ensured, prevent the generation of bridge arm direct pass, thus make the control mode of controlled tr tube simple.
In the above-described embodiments, the first controlled tr tube Q1, the second controlled tr tube Q2, the 3rd controlled tr tube Q3, the 4th controlled tr tube Q4 can be respectively triode, metal-oxide-semiconductor, thyristor, are preferably metal-oxide-semiconductor.In addition, the first driver module 21 and the second driver module 22 can be respectively half-bridge driven chip, also can be respectively boostrap circuit.
Fig. 3 is the circuit diagram of Switching Power Supply embodiment one of the present invention, and this Switching Power Supply comprises rectification circuit and pfc circuit.
In rectification circuit, first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3 and the equal inverse parallel of the 4th metal-oxide-semiconductor Q4 have diode, and, the source electrode of the first metal-oxide-semiconductor Q1 and the drain electrode of the second metal-oxide-semiconductor Q2 connect the first end (Live) of AC power respectively, the source electrode of the 3rd metal-oxide-semiconductor Q3 and the drain electrode of the 4th metal-oxide-semiconductor Q4 connect second end (Neutral) of AC power respectively, the source electrode of the second metal-oxide-semiconductor and the source electrode of the 4th metal-oxide-semiconductor are the first output of rectification circuit, and the drain electrode of the first metal-oxide-semiconductor and the drain electrode of the 3rd metal-oxide-semiconductor are the second output of rectification circuit.In addition, the first driver module, the second driver module select half-bridge driven chip U2, U3 respectively.
In rectification circuit, first sampling comparison module includes: the first diode D1, first resistance R1, 3rd resistance R3 and the first comparator U1A, wherein, the positive pole of the first diode D1 connects the first end (Live) of AC power, the negative pole of the first diode D1 connects the first end of the first resistance R1, second end of the first resistance R1 is by the 3rd resistance R3 ground connection, the in-phase input end of the first comparator U1A connects second end of the first resistance R1, the anti-phase input termination reference voltage (0.3Vef) of the first comparator U1A, the output of the first comparator U1A connects first control end (IN_HI) of half-bridge driven chip U2 and second control end (IN_LO) of half-bridge driven chip U3 respectively.Second sampling comparison module includes: the 7th diode D7, 6th resistance R6, 5th resistance R5 and the second comparator U1B, wherein, the positive pole of the 7th diode D7 connects second end (Neutral) of AC power, the negative pole of the 7th diode D7 connects the first end of the 6th resistance R6, second end of the 6th resistance R6 is by the 5th resistance R5 ground connection, the in-phase input end of the second comparator U1B connects second end of the 6th resistance R6, the anti-phase input termination reference voltage of the second comparator U1B, the output of the second comparator U1B connects first control end (IN_HI) of half-bridge driven chip U3 and second control end (IN_LO) of half-bridge driven chip U2 respectively.
In pfc circuit, 5th controlled tr tube is metal-oxide-semiconductor Q5, and, the first end of energy storage inductor L1 connects the first output of rectification circuit, second output head grounding of rectification circuit, second end of energy storage inductor L1 connects the drain electrode of the 5th metal-oxide-semiconductor Q5 and the positive pole of the 4th rectifier diode D4 respectively, and the negative pole of the 4th rectifier diode D4 connects the anode of electrochemical capacitor C2, the source electrode of the 5th metal-oxide-semiconductor Q5 and the negative terminal of electrochemical capacitor C2 ground connection respectively.
In addition, the power end of half-bridge driven chip U2, U3 connects the anode of electrochemical capacitor C2 respectively, and the earth terminal of half-bridge driven chip U2, U3 connects the second output of rectification circuit respectively.
The following describes the operation principle of this Switching Power Supply: the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4 are the high-voltage MOS pipe of low conduction impedance respectively, it is used for substituting 4 PN junction diode in heap bridge respectively.When AC power powers on first, the rectification first of AC power is by realizing the charging to electrochemical capacitor C2 with the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3, the antiparallel diode of the 4th metal-oxide-semiconductor Q4 respectively.
By starting the work of AC power internal auxiliary power supply after electrochemical capacitor C2 charges, obtain the direct voltage (12Vcc) of 12V, thus the supply power voltage provided for the first comparator U1A, the second comparator U1B, half-bridge driven chip U2, U3.
First diode D1, the first resistance R1, the 3rd resistance R3 are used for carrying out dividing potential drop sampling to the voltage signal that the first end of AC power inputs, and the 7th diode D7, the 6th resistance R6, the 5th resistance R5 are used for carrying out dividing potential drop sampling to the voltage signal of the second end input of AC power.Such as dividing potential drop ratio R1/R3=R6/R5=100.
Suppose when the voltage of the first end (Live) of AC power is for high, when the voltage of the second end (Neutral) is low, by the first diode D1, the first resistance R1, the 3rd resistance R3, dividing potential drop sampling is carried out to half of AC power positive all voltage.When low pressure stage in AC power, the sampled voltage of the positive half cycle of AC power is lower than reference voltage 0.3V, and the signal (L_Driver) that the output of the first comparator U1A exports is low level.Meanwhile, because second end (Neutral) of AC power is now low-voltage state, the signal (N_Driver) that the output of the second comparator U1B exports keeps low level state always.Now, the signal (L_Driver and N_Driver) exported due to the output of the first comparator U1A and the second comparator U1B is all low level, so after these two signals are sent to half-bridge driven chip U2, U3, first drive end (Dri_HI) of half-bridge driven chip U2, U3 and the second drive end (Dri_LO) all output low levels, first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3 and the 4th metal-oxide-semiconductor Q4 are in off state, now still rely on and realize rectification with these four antiparallel diodes of metal-oxide-semiconductor respectively.
When high pressure section in AC power, the sampled voltage of the positive half cycle of AC power is more than or equal to reference voltage 0.3V, and the signal (L_Driver) that the output of the first comparator U1A exports is high level.Meanwhile, because second end (Neutral) of AC power is now low-voltage state, the signal (N_Driver) that the output of the second comparator U1B exports keeps low level state always.Now, because the signal (L_Driver) that the first comparator U1A exports is high level, the signal (N_Driver) that second comparator U1B exports is low level, so after these two signals are sent to half-bridge driven chip U2, U3, first drive end (Dri_HI) of half-bridge driven chip U2 will export high level, its second drive end (Dri_LO) by output low level, thus makes the second metal-oxide-semiconductor Q2 open-minded, and the first metal-oxide-semiconductor Q1 turns off.Simultaneously, first drive end (Dri_HI) of half-bridge driven chip U3 is by output low level, its second drive end (Dri_LO) will export high level, thus make the 3rd metal-oxide-semiconductor Q3 open-minded, 4th metal-oxide-semiconductor Q4 turns off, and is now realized carrying out rectification to the high pressure section voltage that the first end of AC power inputs by the second metal-oxide-semiconductor Q2 and the 3rd metal-oxide-semiconductor Q3.
Suppose when the voltage of second end (Neutral) of AC power is for high, when the voltage of first end (Live) is low, carry out dividing potential drop sampling by the 7th diode D7, the 6th resistance R6, negative positive all voltage of the 5th resistance R5 to AC power.When low pressure stage in AC power, the sampled voltage of the negative half period of AC power is lower than reference voltage 0.3V, and the signal (N_Driver) that the output of the second comparator U1B exports is low level.Meanwhile, because the first end of AC power now (Live) is low-voltage state, the signal (L_Driver) that the output of the first comparator U1A exports keeps low level state always.Now, the signal (L_Driver and N_Driver) exported due to the output of the first comparator U1A and the second comparator U1B is all low level, so after these two signals are sent to half-bridge driven chip U2, U3, first drive end (Dri_HI) of half-bridge driven chip U2, U3 and the second drive end (Dri_LO) all output low levels, first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, the 3rd metal-oxide-semiconductor Q3 and the 4th metal-oxide-semiconductor Q4 are in off state, now still rely on and realize rectification with these four antiparallel diodes of metal-oxide-semiconductor respectively.
When high pressure section in AC power, the sampled voltage of the negative half period of AC power is more than or equal to reference voltage 0.3V, and the signal (N_Driver) that the output of the second comparator U1B exports is high level.Meanwhile, because the first end of AC power is now low-voltage state, the signal (L_Driver) that the output of the first comparator U1A exports keeps low level state always.Now, because the signal (N_Driver) that the second comparator U1B exports is high level, the signal (L_Driver) that first comparator U1A exports is low level, so after these two signals are sent to half-bridge driven chip U2, U3, first drive end (Dri_HI) of half-bridge driven chip U2 is by output low level, its second drive end (Dri_LO) will export high level, thus make the first metal-oxide-semiconductor Q1 open-minded, and the second metal-oxide-semiconductor Q2 turns off.Simultaneously, first drive end (Dri_HI) of half-bridge driven chip U3 will export high level, its second drive end (Dri_LO) is by output low level, thus make the 4th metal-oxide-semiconductor Q4 open-minded, 3rd metal-oxide-semiconductor Q3 turns off, and is now realized carrying out rectification to the high pressure section voltage that the second input of AC power inputs by the first metal-oxide-semiconductor Q1 and the 4th metal-oxide-semiconductor Q4.
Test waveform as shown in Figure 4, the Dead Time controlled between the drive singal of the first metal-oxide-semiconductor Q1 (the 4th metal-oxide-semiconductor Q4) and the drive singal controlling the second metal-oxide-semiconductor Q2 (the 3rd metal-oxide-semiconductor Q3) only has 520uS, effectively avoid the generation of bridge arm direct pass, maximize the conversion efficiency that improve power supply.
Following form is the efficiency comparative's test result to two kinds of different rectifier systems in same specification Switching Power Supply:
As can be seen from the results, in original conventional P N scaffolding heap diode rectification scheme, the pressure drop of PN junction causes loss large, directly affect power supply conversion efficiency, waste energy, add the use cost of Switching Power Supply, reduce competitive strength and the performance of Switching Power Supply product to a great extent.And at simple and efficient of the present invention without in bridge rectification scheme, control simple, under the increase condition of lower cost, achieve the lifting of power supply conversion efficiency, especially showing more obvious when low pressure inputs little year and exports, is a new technology being worthwhile for energy-saving consumption-reducing to carry out.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (9)
1. a rectification circuit, is characterized in that, comprising:
There is the first controlled tr tube of equivalent diode or anti-paralleled diode in body respectively, second controlled tr tube, 3rd controlled tr tube and the 4th controlled tr tube, and, second end of the first controlled tr tube and the first end of the second controlled tr tube connect the first end of AC power respectively, second end of the 3rd controlled tr tube and the first end of the 4th controlled tr tube connect the second end of AC power respectively, second end of the second controlled tr tube and the second end of the 4th controlled tr tube are the first output of rectification circuit, the first end of the first controlled tr tube and the first end of the 3rd controlled tr tube are the second output of rectification circuit,
First sampling comparison module, for sampling to the positive half cycle voltage of AC power, and compares the sampled voltage of the positive half cycle of AC power and reference voltage value;
Second sampling comparison module, for sampling to the negative half period voltage of AC power, and compares the sampled voltage of the negative half period of AC power and reference voltage value;
First driver module, when sampled voltage for the positive half cycle in AC power is less than reference voltage value, control the second controlled tr tube and the shutoff of the 3rd controlled tr tube, when the sampled voltage of the positive half cycle of AC power is more than or equal to reference voltage value, control the second controlled tr tube and the 3rd controlled tr tube is open-minded;
Second driver module, when sampled voltage for the negative half period in AC power is less than reference voltage value, control the first controlled tr tube and the shutoff of the 4th controlled tr tube, when the sampled voltage of the negative half period of AC power is more than or equal to reference voltage value, control the first controlled tr tube and the 4th controlled tr tube is open-minded.
2. rectification circuit according to claim 1, is characterized in that, described first controlled tr tube, the second controlled tr tube, the 3rd controlled tr tube and the 4th controlled tr tube are respectively triode, metal-oxide-semiconductor, thyristor.
3. rectification circuit according to claim 1, is characterized in that, described first driver module, the second driver module are respectively half-bridge driven chip.
4. rectification circuit according to claim 1, is characterized in that, described first driver module, the second driver module are respectively boostrap circuit.
5. rectification circuit according to claim 1, it is characterized in that, described first sampling comparison module comprises the first resistance (R1), 3rd resistance (R3) and the first comparator (U1A), wherein, the first end of the first resistance (R1) connects the first end of AC power, second end of the first resistance (R1) is by the 3rd resistance (R3) ground connection, the in-phase input end of the first comparator (U1A) connects the second end of the first resistance (R1), the anti-phase input termination reference voltage of the first comparator (U1A), the output of the first comparator (U1A) connects the first control end of described first driver module and the second control end of described second driver module respectively,
Described second sampling comparison module comprises the 6th resistance (R6), 5th resistance (R5) and the second comparator (U1B), wherein, the first end of the 6th resistance (R6) connects the second end of AC power, second end of the 6th resistance (R6) is by the 5th resistance (R5) ground connection, the in-phase input end of the second comparator (U1B) connects the second end of the 6th resistance (R6), the anti-phase input termination reference voltage of the second comparator (U1B), the output of the second comparator (U1B) connects the first control end of described second driver module and the second control end of described first driver module respectively.
6. rectification circuit according to claim 5, it is characterized in that, described first sampling comparison module also comprises the first diode (D1), the positive pole of described first diode (D1) connects the first end of AC power, and the negative pole of described first diode (D1) connects the first end of the first resistance (R1);
Described second sampling comparison module also comprises the second diode (D7), the positive pole of described second diode (D7) connects the second end of AC power, and the negative pole of described second diode (D7) connects the first end of the 6th resistance (R6).
7. a Switching Power Supply, is characterized in that, comprises the rectification circuit described in claim 1-6.
8. Switching Power Supply according to claim 7, is characterized in that, also comprises the pfc circuit be connected with described rectification circuit.
9. Switching Power Supply according to claim 8, it is characterized in that, described pfc circuit comprises energy storage inductor (L1), 5th controlled tr tube (Q5), 4th rectifier diode (D4), electrochemical capacitor (C2), wherein, the first end of described energy storage inductor (L1) connects the first output of described rectification circuit, second end of described energy storage inductor (L1) connects the first end of the 5th controlled tr tube (Q5) and the positive pole of the 4th rectifier diode (D4) respectively, the negative pole of the 4th rectifier diode (D4) connects the anode of described electrochemical capacitor (C2), second end of described 5th controlled tr tube (Q5) and the negative terminal of described electrochemical capacitor (C2) ground connection respectively.
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| CN201510081181.XA CN104617794A (en) | 2015-02-13 | 2015-02-13 | Switch power supply and rectifying circuit |
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| CN105978369A (en) * | 2016-05-31 | 2016-09-28 | 东莞市威力固电路板设备有限公司 | Synchronization rectification circuit and synchronization rectification method |
| CN108494244A (en) * | 2018-05-04 | 2018-09-04 | 江苏理工学院 | New forms of energy electric automobile charges and uses switching power supply preceding stage circuit |
| CN110492768A (en) * | 2019-08-13 | 2019-11-22 | 苏州格远电气有限公司 | Rectifier circuit |
| CN110912426A (en) * | 2018-09-18 | 2020-03-24 | 田瑜 | Rectifier circuit and DC power generation circuit |
| CN111599644A (en) * | 2019-02-20 | 2020-08-28 | 珠海恒途电子有限公司 | Controller |
| CN112019074A (en) * | 2019-05-31 | 2020-12-01 | 台达电子工业股份有限公司 | Rectification control module, active bridge rectification control device and operation method thereof |
| CN113206599A (en) * | 2021-04-12 | 2021-08-03 | 三峡大学 | Diode bridge arm parallel type three-level rectification charger |
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| CN112019074A (en) * | 2019-05-31 | 2020-12-01 | 台达电子工业股份有限公司 | Rectification control module, active bridge rectification control device and operation method thereof |
| CN112019074B (en) * | 2019-05-31 | 2023-06-20 | 台达电子工业股份有限公司 | Rectification control module, active bridge rectification control device and operation method thereof |
| CN110492768A (en) * | 2019-08-13 | 2019-11-22 | 苏州格远电气有限公司 | Rectifier circuit |
| CN113206599A (en) * | 2021-04-12 | 2021-08-03 | 三峡大学 | Diode bridge arm parallel type three-level rectification charger |
| CN113206599B (en) * | 2021-04-12 | 2023-12-19 | 三峡大学 | Diode bridge arm parallel three-level rectifying charger |
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