CN101997429B - Global-type switching power supply and serial-parallel direct-current power switching circuit thereof - Google Patents
Global-type switching power supply and serial-parallel direct-current power switching circuit thereof Download PDFInfo
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- CN101997429B CN101997429B CN2009101693567A CN200910169356A CN101997429B CN 101997429 B CN101997429 B CN 101997429B CN 2009101693567 A CN2009101693567 A CN 2009101693567A CN 200910169356 A CN200910169356 A CN 200910169356A CN 101997429 B CN101997429 B CN 101997429B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention relates to a global-type switching power supply and a serial-parallel direct-current power switching circuit thereof. The serial-parallel direct-current power switching circuit comprises a transformer, a full-bridge switching circuit, a switching switch and a pulse-width modulation controller, wherein the full-bridge switching circuit comprises first and second switching groups which are connected in parallel; each driving switching group comprises an upper arm driving switch and a lower arm driving switch of which the two phases are in tandem connection; the transformer comprises a primary side coil and a secondary side coil which have center taps; and cascading nodes of the first and the second switching groups are connected to both ends of the primary side coil respectively, and the center taps of the transformer are connected to the ground through the switching switch. Therefore, the on and off of the first and the second switching groups and the switching switch are controlled by the pulse-width modulation controller, so that the primary side coil of the transformer is in a structure of series connection or parallel connection to change the turn ratio of the transformer.
Description
Technical field
The present invention to direct-current power supply converting circuit, refers to a kind of series-parallel direct-current power supply converting circuit about a kind of direct current especially.
Background technology
Switched power supplier has variety classes according to the use AC power, generally can be divided into 90V～130V low pressure stage AC power and 185V～265V high pressure section AC power at present.At present 220V or 110V AC power are used in Taiwan, so the switched power supplier product promptly generally includes the switched power supplier that single cross stream power supply is used, or full range type switched power supplier; Wherein comparatively universal with full range type switched power supplier again.
Seeing also shown in Figure 8ly, is the circuit diagram of an existing full range type AC power supply, includes a full-wave rectifier 50, a boost power factor correction circuit 51 and a direct current power-switching circuit 52.Wherein this full-wave rectifier 50 becomes direct current string ripple with AC power rectification (AC IN); Adjust its voltage and current phase by the power factor correction controller 511 of the circuit of power factor correction that is the booster circuit framework 51 through the first active switch (S1) again; Exporting the DC power supply of preferable power factor, and the voltage of direct current string ripple is promoted to about 400 volts of high-voltage DC power supply (V
BULK).Afterwards, again with this high-voltage DC power supply (V
BULK) input to this direct-current power supply converting circuit 52; By the PWM controller 521 of this direct-current power supply converting circuit 52 change in voltage according to its dc voltage output end (Vo); Through the size of current of second its transformer 522 primary sides of active switch (S2) modulation, keep galvanic current and press output (Vo).
Circuit framework by above switched power supplier can be known; This full-wave rectifier 50 can be rectified into the different direct current string ripple of voltage swing with the alternating current source of 220V or 110V; But after inputing to this boost power factor correction circuit 51, all can boost to 400V high-voltage DC power supply (V
BULK), the direct-current power supply converting circuit of order back level can export step-down of 400V high-voltage DC power supply and voltage stabilizing to load to 12V or 5V; If adopt the buck-type power factor correction circuit, then all can be depressurized to 80V, cooperate the direct-current power supply converting circuit that makes different turn ratio transformers, promptly can to 12V or 5V, export DC power supply step-down of 80V mesohigh and voltage stabilizing to load.
With whole power supply conversion efficiency; When the AC power of 220V inputs to above-mentioned switched power supplier; The power factor correction controller 511 meeting output pulse width modulating signals to the first of this boost power factor correction circuit 51 are switch (S1) initiatively; Make energy storage capacitor (C1) output one 400V DC power supply give the direct-current power supply converting circuit 52 of back level, this moment, the power supply conversion efficiency of computing whole was about 96%; Yet when the AC power of 110V is imported; The power factor correction controller 511 of this circuit of power factor correction 51 can be heightened the pulsewidth of this PWM signal; Make energy storage capacitor (C1) export the 400V DC power supply equally; Yet because the ON time of the first active switch (S1) is elongated, the conduction impedance of this first active switch (S1) promptly consumes more electric energy, and reduces whole conversion efficiency to 94%.
Power factor correction controller with the buck-type power factor correction circuit; When the AC power of 220V inputs to above-mentioned switched power supplier, this buck-type power factor correction circuit must control first initiatively switch (S1) voltage is downgraded 80V, and reduce whole conversion efficiency to 94%; Hence one can see that; Though existing full range type switched power supplier can use the AC power of 220V or 110V, adopt boost power factor correction circuit and when being plugged to the 110V AC power, or adopt the buck-type power factor correction circuit and when being plugged to the 220V AC power; The integrated circuit conversion efficiency is not good, so must seek better circuit design.
Summary of the invention
The objective of the invention is to, solve the technical problem of existing full range type (Full Range) switched power supplier power supply conversion efficiency.
Desire to reach above-mentioned purpose, the present invention provides a kind of full range type switched power supplier, includes:
One rectifier is connected to an AC power, AC power is converted into direct current string ripple power supply;
One signal detects the unit, detects present input ac power voltage swing, and exports one and detect signal;
One circuit of power factor correction, its input are connected to this rectifier output end and signal detects the output of unit, and according to present input ac power voltage swing, adjusts the voltage swing that it exports first DC power supply; And
Output and signal that one series-parallel direct-current power supply converting circuit, its input are connected to this circuit of power factor correction detect the unit, receiving first DC power supply, and export after being converted into second DC power supply; Wherein this series-parallel direct-current power supply converting circuit makes transformer turn ratio be directly proportional with first DC power supply and the second DC power supply voltage ratio according to the turn ratio of first DC power supply and the second DC power supply voltage ratio its transformer first siding ring of adjustment and second siding ring.
Desire to reach above-mentioned purpose, the present invention also provides a kind of series-parallel direct-current power supply converting circuit, includes:
One transformer includes a tapped first siding ring and a second siding ring;
One full bridge switching circuit; Confession is connected to the output of circuit of power factor correction; And include two the parallel connection first and second switches set; Each active switches set includes the upper arm active switch and the underarm active switch of two serial connections, and the series connection node of this first and second switches set is connected with transformer first siding ring two ends again;
One switches switch, is connected between transformer first siding ring centre tap and the earth terminal; And
One PWM controller is connected to the two upper arm active switch of first and second switches set and the control end of two underarms active switch and diverter switch; This PWM controller is according to the output voltage size of a prime circuit of power factor correction; Carry out number of turn adjustment program; Promptly by the active switch of control full bridge switching circuit and the keying state of diverter switch; The transformer turn ratio of this output voltage of adjustment coupling is carried out the direct current conversion program afterwards again.
The series-parallel direct-current power supply converting circuit of the invention described above is connected to the output of prime circuit of power factor correction; This PWM controller can be according to the output voltage size of AC supply voltage size or this prime circuit of power factor correction again; The active switch of control full bridge switching circuit and the keying state of diverter switch; After the turn ratio of this output voltage of adjustment coupling, select suitable active switch to carry out the DC power supply conversion program again; Meaning promptly; With boost power factor correction circuit; When exporting about 400V high-voltage DC power supply to full bridge switching circuit when using 220V high pressure section AC supply voltage, promptly the turn ratio of control transformer first siding ring and second siding ring is directly proportional with high-voltage DC power supply and low-voltage dc power supply voltage ratio; Otherwise, when exporting about 200V high-voltage DC power supply to full bridge switching circuit, then must downgrade the turn ratio of transformer when using 110V low pressure stage AC supply voltage, make transformer turn ratio be directly proportional with high-voltage DC power supply and low-voltage dc power supply voltage ratio; Thus, no matter which kind of AC power direct current of the present invention is used to direct-current power supply converting circuit, all can exports and stablize and fixing low-voltage dc power supply voltage.
Beneficial effect of the present invention is; A kind of new full range type switched power supplier and series-parallel direct-current power supply converting circuit thereof are provided; Wherein this series-parallel direct-current power supply converting circuit can be exported the DC power supply of different voltages according to the prime circuit of power factor correction; Change its transformer turn ratio, improve the power supply conversion efficiency that uses full range type switched power supplier of the present invention.Therefore, direct current of the present invention uses the prime circuit of power factor correction that direct-current power supply converting circuit can be compatible to output different electric straightening stream power supply, makes full range type switched power supplier have better power supply conversion efficiency.
Description of drawings
Fig. 1 is the circuit block diagram of full range type switched power supplier of the present invention.
The signal that Fig. 2 uses for the present invention's first preferred embodiment detects the detailed circuit diagram of unit.
Fig. 3 is the detailed circuit diagram of first preferred embodiment of full range type switched power supplier of the present invention.
Fig. 4 A is used for the circuit operation figure of high pressure section AC power for Fig. 3.
Fig. 4 B is used for the circuit operation figure of low pressure stage AC power for Fig. 3.
Fig. 5 is the detailed circuit diagram of second preferred embodiment of full range type switched power supplier of the present invention.
The signal that Fig. 6 uses for the present invention's second preferred embodiment detects the detailed circuit diagram of unit.
Fig. 7 A is used for the circuit operation figure of high pressure section AC power for Fig. 5.
Fig. 7 B is used for the circuit operation figure of low pressure stage AC power for Fig. 5.
Fig. 8 is the detailed circuit diagram of existing full range type switched power supplier.
Description of reference numerals:
The 10-direct-current power supply converting circuit; 11,11 '-transformer; 111,111 '-first siding ring; 111a, 111a '-coil; 111b, 11b '-coil; 112,112 '-second siding ring; The 12-full bridge switching circuit; 121-first switches set; 20, the 20a-circuit of power factor correction; The 30-rectifier; The 40-signal detects the unit; The 41-comparator; The 50-full-wave rectifier; The 51-circuit of power factor correction; The 511-power factor correction controller; The 52-direct-current power supply converting circuit; The 521-PWM controller; The 522-transformer.
Embodiment
At first see also Fig. 1 and shown in Figure 3, be a kind of full range type switched power supplier of the present invention, it includes:
One rectifier 30 can be connected to an AC power jointly, AC power is converted into direct current string ripple power supply;
One signal detects unit 40, detects present input ac power voltage swing, and exports one and detect signal;
One circuit of power factor correction 20, its input are connected to the output that these rectifier 30 outputs and signal detect unit 40, according to input ac power voltage swing at present, adjust it and export the first DC power supply (V
BULK) voltage swing; In present embodiment, adopt boost power factor correction circuit; And
Output and signal that one series-parallel direct-current power supply converting circuit 10, its input are connected to this circuit of power factor correction 20 detect unit 40, to receive the first DC power supply (V
BULK), and be converted into the second DC power supply (V
Out) back output; Wherein this series-parallel direct-current power supply converting circuit 10 is according to the first DC power supply (V
BULK) and the second DC power supply (V
Out) turn ratio of its transformer 11 first siding rings 111 of voltage ratio adjustment and second siding ring 112, make transformer 11 turn ratios and the first DC power supply (V
BULK) and the second DC power supply (V
Out) voltage ratio is directly proportional.
Please cooperate and consult shown in Figure 2ly, for above-mentioned signal detects the detailed circuit diagram of a preferred embodiment of unit 40, it includes:
(R1, R2 C2), are connected to the output of this rectifier 10 to one low pass filter, direct current string ripple further is filtered into the accurate position of a direct current;
One comparator 41, one input end are connected to low pass filter, and (C2), another input then connects one first reference voltage (V for R1, R2
Ref1), after comparison, promptly export high electronegative potential direct current signal;
One electronic switch (Q), its control end is connected to the output of this comparator 41, again this electronic switch (Q) serial connection one resistance (R13); And
One voltage divider, (R11 R12) composes in series, and wherein descends resistance (R12) and electronic switch that is connected in series (Q) and resistance (R13) parallel connection, and the series connection node of this voltage divider is connected to corresponding circuit of power factor correction 20 again by two resistance.
Please cooperate and consult shown in Figure 3ly, be the detailed circuit diagram of the switched power supplier that adopts boost power factor correction circuit 20, it includes:
One energy storage inductor (L), the one of which end is connected to the output of this full-wave rectifier 20;
One energy storage capacitor (C
Bulk), be connected between this energy storage inductor (L) other end and the earth terminal, export the first DC power supply (V
BULK) give this series-parallel direct-current power supply converting circuit 10;
One electronic switch (Q5) is connected in this energy storage inductor (L) and energy storage capacitor (C
Bulk) between node and the ground connection; And
One controller (M1); Its output is connected to control end of this electronic switch (Q5) and the output that corresponding signal detects unit 40; Basis signal detects unit 40 adjustment electronic switch (Q5) control end is exported a PWM signal, and this controller (M1) includes an error amplifier (M11), one second reference voltage end (V at least
Ref2) and a switch drive unit (M12), wherein this error amplifier (M11) input is connected to this reference voltage end (V
Ref2), another input then is connected to voltage divider (R11, R12) the series connection contact that respective signal detects unit 40.
Below sincerely further specify the circuit operation of above-mentioned boost power factor correction circuit 20:
When present connection 220V high pressure section AC power; Then this signal detect the comparator 41 of unit 40 can output one high potential to drive this electronic switch (Q) conducting; Make resistance (R13) parallelly connected with the following resistance (R12) of voltage divider, therefore the error amplifier (M11) in the above-mentioned controller (M1) and voltage divider (R11, the voltage quasi position that R12) connects promptly can descend; And then change this switch drive unit (M12) PWM signal that gives electronic switch (Q) of exporting, make each energy storage capacitor (C
Bulk) go up and export about 400V first DC power supply (V
BULK).
When present connection 110V low pressure stage AC power, then this signal detect the comparator 41 of unit 40 can output one electronegative potential, and make no longer conducting of electronic switch (Q), thus resistance (R13) no longer with voltage divider (R11, following resistance (R12) parallel connection R12); At this moment, the error amplifier (M11) in the above-mentioned controller (M1) and voltage divider (R11, the voltage quasi position that R12) connects promptly can rise, and then changes this switch drive unit (M12) and export and give the PWM signal that electronics moves switch (Q), and in each energy storage capacitor (C
Bulk) go up and export about 200V first DC power supply (V
BULK).
Therefore, the circuit of power factor correction 20 of switched power supplier of the present invention is different according to the AC supply voltage that uses really, and exports the first DC power supply (V of different voltage swings
BULK) give the series-parallel direct-current power supply converting circuit 10 of back level.
Further include as for series-parallel direct-current power supply converting circuit 10 of the present invention:
One transformer 11 includes a tapped first siding ring 111 and a second siding ring 112, and this first siding ring 111 includes two coil 111a, 111b; Wherein this second siding ring 112 is through a current rectifying and wave filtering circuit (D1～D4, C
Out) the output second DC power supply (V
Out);
One full bridge switching circuit 12; First and second switches set 121 that includes two parallel connections; 122, each first and second initiatively switches set 121,122 include the two-phase serial connection a upper arm initiatively switch (Q1) (Q3) and a underarm initiatively switch (Q2) is (Q4); The series connection node of this first and second switches set 121,122 is connected with transformer 11 first siding rings 111 2 ends again; Wherein (Q1～Q4) can be MOSFET or IGBT adopts MOSFET to each active switch in present embodiment, the grid of each MOSFET is its control end;
One switches switch (SW), is connected between these transformer 11 first siding rings, 111 centre taps and the earth terminal; This diverter switch (SW) is a relay in present embodiment; And
One PWM controller 13; Two upper arm that are connected to first and second switches set 121,122 initiatively switches (Q1) (Q3) and two underarms initiatively switches (Q2) (Q4) with the control end of diverter switch (SW), an input of this PWM controller 13 is connected to this signal and detects voltage divider (R11 in the unit 40 again; R12) series connection contact; Or be connected to this signal detect low pass filter in the unit 40 (R1, R2, C2); Wherein this PWM controller 13 detects the output voltage size that signal is judged prime circuit of power factor correction 20 of unit 40 outputs according to this signal; And carry out a number of turn and adjust program; Promptly by active switch (Q1～Q4) and the keying state of diverter switch (SW), this first DC power supply (V of adjustment coupling of control full bridge switching circuit 12
Out) transformer 11 first siding rings 111 and second siding ring 112 turn ratios of voltage, carry out the direct current conversion program afterwards again, (the output pulse width modulating signal of Q1～Q4) is with the first DC power supply (V of input promptly to select suitable active switch
BULK) change out the second DC power supply (V of stable and fixed voltage by the suitable transformer 11 of turn ratio
Out).
Below sincerely further specify the output voltage size of above-mentioned PWM controller 13 according to prime circuit of power factor correction 20, the adjustment direct current is to transformer 11 first siding rings 111 of direct-current power supply converting circuit 13 and the equivalent circuit diagram of second siding ring 112 turn ratios.
At first please cooperate and consult shown in Fig. 4 A, make that prime circuit of power factor correction 20 is a booster circuit, and can be in output capacitance (C when using the high pressure section AC power
Bulk) output one first high-voltage DC power supply (V
BULK).To use the 220V AC power, the first high-voltage DC power supply (V of the about 400V of these boost power factor correction circuit 20 outputs
BULK); Therefore PWM controller 13 of the present invention must be kept the maximum number of turn (Na) by control transformer 11 first siding rings 111; The upper arm active switch (Q3) of promptly controlling second switch group 122 is closed condition; And underarm active switch (Q4) is conducting state, and controls this diverter switch (SW) simultaneously for often cut-offfing line state, makes transformer 11 first siding rings 111 constitute single coil; And its two ends are connected to respectively between first switches set, 121 series connection nodes and the earth terminal, make its first siding ring 111 and second siding ring 112 turn ratios (Na: the Nb) first high-voltage DC power supply (V of the about 400V of coupling prime boost power factor correction circuit 20 outputs
BULK).At this moment; This PWM controller 13 export again two groups of pulsewidth width be 50% PWM signal (PWM1, the last underarm that PWM2) gives first switches set 121 initiatively switch control end (G1) (G2), with the last underarm active switch (Q1) that alternately opens and closes first switches set 121 (Q2); Because first siding ring 111 2 ends further are serially connected with inductance capacitance (Cr1; Lr1) (Cr2, Lr2), therefore in the upper arm of first switches set 121 or underarm switch (Q1) (Q2) during conducting initiatively; Inductance capacitance (the Cr1 that first siding ring 111 can be connected in series with two groups; Lr1) (Cr2 Lr2) constitutes a resonance trough circuit (Resonance Tank), makes the second stable and fixing DC power supply (V of transformer 11 second siding rings, 112 outputs
Out).
Please cooperate and consult shown in Fig. 4 B, when above-mentioned boost power factor correction circuit (20) uses low pressure stage (like 110V) AC power, its output capacitance (C
Bulk) then output about 200V the first medium voltage DC source (V
BULK); This moment, PWM controller 13 these diverter switches of control (SW) of the present invention were normally closed short-circuit condition; The 50% PWM signal of exporting two groups of anti-phases again gives two upper arm active switches (Q1) (Q3); And two underarms (Q2) (Q4) switch initiatively, meaning promptly two upper arm initiatively switches (Q1) be one group of synchro switch group (Q3), and two underarms initiatively switches (Q2) be another synchro switch group (Q4).So, the transition joint meeting ground connection of this transformer first siding ring 111 and independent become two through two upper arm initiatively switches (Q1) (Q3) or two underarms initiatively switches (Q2) (Q4) be parallel connection coil (111a) (111b), with the first siding ring 111 that reduces transformer 11 and the turn ratio (Na/2: Nb) of second siding ring 112; Since first siding ring 111 2 ends further be serially connected with inductance capacitance (Cr1, Lr1) (Cr2, Lr2); Therefore as two upper arm (Q3) two bridging coil 111a during the while conducting of switches (Q1) initiatively, 111b can with inductance capacitance (Cr1, Lr1) (Cr2; Lr2) constitute the resonance trough circuit; With should two underarms (Q4) two bridging coil 111a during conducting simultaneously of switches (Q2) initiatively, 111b can with inductance capacitance (Cr1, Lr1) (Cr2; Lr2) constitute the resonance trough circuit, make transformer 11 turn ratios and the first medium voltage DC source (V
BULK) and the second DC power supply voltage (V
Out) than being directly proportional.
Can know that by above-mentioned explanation when this PWM controller 13 was applied to boosting power factor correction circuit 20, the control logic of its adjustment number of turn program was as shown in the table:
See also Fig. 5 and shown in Figure 6, power supply unit of the present invention adopts another preferred embodiment of buck-type power factor correction circuit 20a, and wherein this buck-type power factor correction circuit 20a includes:
One electronic switch (Q5), the one of which end is connected with the output of this rectifier 30;
One energy storage inductor (L), the one of which end is connected to the other end of this electronic switch (Q5);
One diode (D), its negative electrode are connected to this electronic switch (Q5) and energy storage inductor (L) series connection node, and its anode then is connected to earth terminal;
One energy storage capacitor (C
Bulk), be connected between this energy storage inductor (L1) other end and the earth terminal, export the first DC power supply (V
BULK) give this series-parallel direct-current power supply converting circuit 10;
One controller (M1 '); Its output is connected to control end of this electronic switch (Q5) and the output that corresponding signal detects unit 40; Basis signal detects unit 40 adjustment electronic switch (Q5) control end is exported a PWM signal, and this controller (M1 ') includes an error amplifier (M11), one second reference voltage end (V at least again
Ref2) and a switch drive unit (M12), wherein this error amplifier (M11) input is connected to this reference voltage end (V
Ref2), another input then is connected to the voltage divider series connection contact that respective signal detects unit 40.
Below sincerely further specify the circuit operation of above-mentioned buck-type power factor correction circuit:
When present connection 220V high pressure section AC power; Then this signal detect the comparator 41 of unit 40 can output one high potential to drive this electronic switch (Q) conducting; Make resistance (R13) parallelly connected with the following resistance (R12) of voltage divider, therefore the error amplifier (M11) in the above-mentioned controller (M1 ') and voltage divider (R11, the voltage quasi position that R12) connects promptly can descend; And then change this switch drive unit (M12) PWM signal that gives electronic switch (Q) of exporting, make each energy storage capacitor (C
Bulk) go up and export about 160V second high-voltage DC power supply (V
BULK).
When present connection 110V low pressure stage AC power, then this signal detect the comparator 41 of unit 40 can output one electronegative potential, and make no longer conducting of electronic switch (Q), thus resistance (R13) no longer with voltage divider (R11, following resistance (R12) parallel connection R12); At this moment, the error amplifier (M11) in the above-mentioned controller (M1 ') and voltage divider (R11, the voltage quasi position that R12) connects promptly can rise, and then changes this switch drive unit (M12) and export and give the PWM signal that electronics moves switch (Q), and in each energy storage capacitor (C
Bulk) go up and export about 80V second medium voltage DC source (V
BULK).
Therefore, the buck-type power factor correction circuit 20a of switched power supplier of the present invention is really different according to the AC supply voltage that uses, and first DC power supply of exporting different voltage swings gives the series-parallel direct-current power supply converting circuit of back level.
Please cooperate and consult shown in Fig. 7 A, further specify the circuit operation of the series-parallel direct current of employing voltage-dropping type prime circuit of power factor correction DC power supply circuit 10:
When this buck-type power factor correction circuit 20a uses the 220V AC power, can export about 160V second a high-voltage DC power supply (V
BULK); Therefore PWM controller 13 of the present invention must be kept the maximum number of turn (Nc) by control transformer 11 ' first siding ring 111 '; The upper arm active switch (Q3) of promptly controlling second switch group 122 is closed condition; And underarm active switch (Q4) is conducting state, and controls this diverter switch (SW) simultaneously for often cut-offfing line state, makes transformer 11 ' first siding ring 111 ' constitute single coil; And its two ends are connected to respectively between first switches set, 121 ' series connection node and the earth terminal, make its turn ratio (Nc: the Nd) second high-voltage DC power supply (V of the about 160V of coupling prime buck-type power factor correction circuit 20 outputs
BULK).At this moment; It is that initiatively switch control end (G1) is (G2) for 50% the PWM signal last underarm that gives first switches set 121 ' that this PWM controller 13 is exported two groups of pulsewidth width again; With the last underarm that alternately opens and closes first switches set 121 initiatively switch (Q1) (Q2) because first siding ring 111 ' two ends further are serially connected with inductance capacitance (Cr1, Lr1) (Cr2; Lr2); Therefore in the upper arm of first switches set 121 or underarm switch (Q1) (Q2) during conducting initiatively, first siding ring 111 can with two groups of inductance capacitances that are connected in series (Cr1, Lr1) (Cr2; Lr2) constitute a resonance trough circuit (Resonance Tank), make the second stable and fixing DC power supply (V of transformer 11 ' second siding ring, 121 ' output
Out).
Please cooperate and consult shown in Fig. 7 B, when above-mentioned buck-type power factor correction circuit uses 110V low pressure stage AC power, its output capacitance (C
BULK) then output about 80V the second medium voltage DC source (V
BULK); This moment, PWM controller 13 these diverter switches of control (SW) of the present invention were normally closed short-circuit condition; The 50% PWM signal of exporting two groups of anti-phases again gives two upper arm active switches (Q1) (Q3); And two underarm initiatively switch (Q2) (Q4), meaning promptly two upper arm initiatively switches (Q1) be one group of synchro switch group (Q3), and two underarms initiatively switches (Q2) be another synchro switch group (Q4).So, the transition joint meeting ground connection of this transformer 11 ' first siding ring 111 ' and independent become two through two upper arm initiatively switches (Q1) (Q3) or two underarms initiatively switches (Q2) (Q4) be parallelly connected coil 111a ', 111b '; With the first siding ring 111 ' that reduces transformer 11 ' turn ratio (Nc/2: Nd) promptly reduce with second siding ring 112 '; Since first siding ring two ends further be serially connected with inductance capacitance (Cr1, Lr1) (Cr2, Lr2); Therefore when two upper arm initiatively switches (Q1) (Q3) during the while conducting two bridging coils can with inductance capacitance (Cr1; Lr1) (Cr2 Lr2) constitutes the resonance trough circuit, with should two underarms (Q4) two bridging coil 111a ' during conducting simultaneously of switches (Q2) initiatively; 111b ' meeting and inductance capacitance (Cr1; Lr1) (Cr2 Lr2) constitutes the resonance trough circuit, makes transformer 11 ' first siding ring 111 ' and the second siding ring 112 ' turn ratio and the second medium voltage DC source (V
BULK) and the second DC power supply (V
Out) voltage ratio is directly proportional.
Can know that by above-mentioned explanation when this PWM controller 13 was applied to voltage reducing power-factor correction circuit 20a, the control logic of its adjustment number of turn program was as shown in the table:
Can know by above-mentioned two embodiment that lift; The present invention can be according to prime circuit of power factor correction output DC source size; The transformer turn ratio of adjustment this DC power supply of coupling and low-voltage dc power supply ratio makes the present invention be applied to full range type switched power supplier, can cooperate the use of different high pressure sections or low pressure stage AC power; Initiatively adjust the suitable transformer turn ratio, effectively improve the whole power supply conversion efficiency of switched power supplier.
The above description of this invention is illustrative, and nonrestrictive, and those skilled in the art is understood, and within spirit that claim limits and scope, can carry out many modifications, variation or equivalence to it, but they will fall in protection scope of the present invention all.
Claims (14)
1. a full range type switched power supplier is characterized in that, includes:
One rectifier is connected to an AC power, and this AC power is given exporting a rectifier power source after the rectification;
One signal detects the unit, detects present input ac power voltage swing, and exports one and detect signal;
One circuit of power factor correction, its input are connected to the output that this rectifier output end and signal detect the unit, according to input ac power voltage swing at present, adjust the voltage swing that it exports first DC power supply; And
Output and signal that one series-parallel direct-current power supply converting circuit, its input are connected to this circuit of power factor correction detect the unit, receiving first DC power supply, and export after being converted into second DC power supply; Wherein this series-parallel direct-current power supply converting circuit makes transformer turn ratio be directly proportional with first DC power supply and the second DC power supply voltage ratio according to the turn ratio of first DC power supply and the second DC power supply voltage ratio its transformer first siding ring of adjustment and second siding ring.
2. full range type switched power supplier as claimed in claim 1 is characterized in that, this signal detects unit pack and contains:
One low pass filter is connected to the output of this rectifier, this rectifier power source further is filtered into a direct current power supply;
One comparator, one input end is connected to low pass filter, and another input then connects one first reference voltage, after comparison, promptly exports high electronegative potential direct current signal;
One electronic switch, its control end is connected to the output of this comparator, and this electronic switch is connected in series a resistance again; And
One voltage divider is composed in series by two resistance, wherein descends the parallel connection of resistance and the electronic switch that is connected in series and resistance, and the series connection node under the last resistance of this voltage divider reaches again between the resistance is connected to corresponding circuit of power factor correction.
3. full range type switched power supplier as claimed in claim 2 is characterized in that this circuit of power factor correction is a booster circuit, and it includes:
One energy storage inductor, the one of which end is connected to the output of this rectifier;
One energy storage capacitor is connected between this energy storage inductor other end and the earth terminal, exports first DC power supply and gives this series-parallel direct-current power supply converting circuit;
One electronic switch is connected between the intermediate node and ground connection that this energy storage inductor is connected with energy storage capacitor; And
One controller; Its output is connected to the control end of this electronic switch and the output of corresponding voltage checking circuit; According to the adjustment of voltage checking circuit electronic switch controling end is exported a PWM signal; This controller includes an error amplifier, one second reference voltage end and a switch drive unit at least again, and wherein this error amplifier one input is connected to this second reference voltage end, and another input then is connected to the voltage divider series connection contact of corresponding voltage checking circuit.
4. full range type switched power supplier as claimed in claim 2 is characterized in that this circuit of power factor correction is a reduction voltage circuit, and it includes:
One electronic switch, the one of which end is connected with the output of this rectifier;
One energy storage inductor, the one of which end is connected to the other end of this electronic switch;
One diode, its negative electrode are connected to this electronic switch and energy storage inductor series connection node, and its anode then is connected to earth terminal;
One energy storage capacitor is connected between this energy storage inductor other end and the earth terminal, exports first DC power supply and gives this series-parallel direct-current power supply converting circuit;
One controller; Its output is connected to the control end of this electronic switch and the output of corresponding voltage checking circuit; According to the adjustment of voltage checking circuit electronic switch controling end is exported a PWM signal; This controller includes an error amplifier, one second reference voltage end and a switch drive unit at least again, and wherein this error amplifier one input is connected to this second reference voltage end, and another input then is connected to the voltage divider series connection contact of corresponding voltage checking circuit.
5. like claim 3 or 4 described full range type switched power suppliers, it is characterized in that this series-parallel direct-current power supply converting circuit includes:
One transformer includes a tapped first siding ring and a second siding ring;
One full bridge switching circuit; First and second switches set that includes two parallel connections; Each active switches set includes the upper arm active switch and the underarm active switch of two-phase serial connection, and the series connection node of this first and second switches set is connected with transformer first siding ring two ends again;
One switches switch, is connected between this transformer first siding ring centre tap and the earth terminal; And
One PWM controller; Be connected to the two upper arm active switch of first and second switches set and the control end of two underarms active switch and diverter switch; An input of this PWM controller is connected to the series connection contact that this signal detects voltage divider in the unit again; According to the output voltage size of this circuit of power factor correction, carry out number of turn adjustment program, promptly by the active switch of control full bridge switching circuit and the keying state of diverter switch; The transformer turn ratio of this output voltage of adjustment coupling is carried out the direct current conversion program afterwards again.
6. like claim 3 or 4 described full range type switched power suppliers, it is characterized in that this series-parallel direct-current power supply converting circuit includes:
One transformer includes a tapped first siding ring and a second siding ring;
One full bridge switching circuit; First and second switches set that includes two parallel connections; Each active switches set includes the upper arm active switch and the underarm active switch of two-phase serial connection, and the series connection node of this first and second switches set is connected with transformer first siding ring two ends again;
One switches switch, is connected between this transformer first siding ring centre tap and the earth terminal; And
One PWM controller; Be connected to the two upper arm active switch of first and second switches set and the control end of two underarms active switch and diverter switch; An input of this PWM controller is connected to this signal and detects and be connected to this signal in the unit and detect low pass filter in the unit again; According to the output voltage size of this circuit of power factor correction, carry out number of turn adjustment program, promptly by the active switch of control full bridge switching circuit and the keying state of diverter switch; The transformer turn ratio of this output voltage of adjustment coupling is carried out the direct current conversion program afterwards again.
7. full range type switched power supplier as claimed in claim 5 is characterized in that, the number of turn adjustment program package of this PWM controller contains:
When judging use high pressure section AC power; The upper arm of control second switch group initiatively switch is closed condition; And underarm active switch is conducting state; And control this diverter switch simultaneously for often cut-offfing line state, and to export two groups of pulsewidth width be the last underarm switch control end initiatively that 50% PWM signal gives first switches set, alternately to open and close the last underarm active switch of first switches set;
When judging use low pressure stage AC power; Make the upper arm active switch and the underarm active switch of this first and second switches set be respectively two groups of synchro switch groups; And to control this diverter switch be normally closed short-circuit condition, exports two groups of pulsewidth width simultaneously and be 50% PWM signal to corresponding synchro switch group.
8. full range type switched power supplier as claimed in claim 6 is characterized in that, the number of turn adjustment program package of this PWM controller contains:
When judging use high pressure section AC power; The upper arm of control second switch group initiatively switch is closed condition; And underarm active switch is conducting state; And control this diverter switch simultaneously for often cut-offfing line state, and to export two groups of pulsewidth width be the last underarm switch control end initiatively that 50% PWM signal gives first switches set, alternately to open and close the last underarm active switch of first switches set;
When judging use low pressure stage AC power; Make the upper arm active switch and the underarm active switch of this first and second switches set be respectively two groups of synchro switch groups; And to control this diverter switch be normally closed short-circuit condition, exports two groups of pulsewidth width simultaneously and be 50% PWM signal to corresponding synchro switch group.
9. full range type switched power supplier as claimed in claim 7 is characterized in that, this diverter switch is a relay.
10. full range type switched power supplier as claimed in claim 7 is characterized in that, each active switch can be MOSFET or IGBT.
11. full range type switched power supplier as claimed in claim 8 is characterized in that, this diverter switch is a relay.
12. full range type switched power supplier as claimed in claim 8 is characterized in that, each active switch can be MOSFET or IGBT.
13. a series-parallel direct-current power supply converting circuit is characterized in that, includes:
One transformer includes a tapped first siding ring and a second siding ring;
One full bridge switching circuit; First and second switches set that includes two parallel connections; Each active switches set includes the upper arm active switch and the underarm active switch of two-phase serial connection, and the series connection node of this first and second switches set is connected with transformer first siding ring two ends again;
One switches switch, is connected between this transformer first siding ring centre tap and the earth terminal;
One PWM controller is connected to the two upper arm active switch of first and second switches set and the control end of two underarms active switch and diverter switch; This PWM controller is according to the output voltage size of a prime circuit of power factor correction; Carry out number of turn adjustment program; Promptly by the active switch of control full bridge switching circuit and the keying state of diverter switch; The transformer turn ratio of this output voltage of adjustment coupling is carried out the direct current conversion program afterwards again.
14. series-parallel direct-current power supply converting circuit as claimed in claim 13 is characterized in that, the number of turn adjustment program package of this PWM controller contains:
When judging use high pressure section AC power; The upper arm of control second switch group initiatively switch is closed condition; And underarm active switch is conducting state; And control this diverter switch simultaneously for often cut-offfing line state, and to export two groups of pulsewidth width be the last underarm switch control end initiatively that 50% PWM signal gives first switches set, alternately to open and close the last underarm active switch of first switches set;
When judging use low pressure stage AC power; Make the upper arm active switch and the underarm active switch of this first and second switches set be respectively two groups of synchro switch groups; And to control this diverter switch be normally closed short-circuit condition, exports two groups of pulsewidth width simultaneously and be 50% PWM signal to corresponding synchro switch group.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW098112442A TWI382640B (en) | 2009-04-15 | 2009-04-15 | Global switched power supply and its serial - to - parallel DC - to - DC power conversion circuit |
| CN2009101693567A CN101997429B (en) | 2009-04-15 | 2009-08-25 | Global-type switching power supply and serial-parallel direct-current power switching circuit thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW098112442A TWI382640B (en) | 2009-04-15 | 2009-04-15 | Global switched power supply and its serial - to - parallel DC - to - DC power conversion circuit |
| CN2009101693567A CN101997429B (en) | 2009-04-15 | 2009-08-25 | Global-type switching power supply and serial-parallel direct-current power switching circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101997429A CN101997429A (en) | 2011-03-30 |
| CN101997429B true CN101997429B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101693567A Expired - Fee Related CN101997429B (en) | 2009-04-15 | 2009-08-25 | Global-type switching power supply and serial-parallel direct-current power switching circuit thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101997429B (en) |
| TW (1) | TWI382640B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI437410B (en) | 2011-09-30 | 2014-05-11 | Ind Tech Res Inst | Buck power factor correcting systems |
| TW201427259A (en) * | 2012-12-19 | 2014-07-01 | Chyng Hong Electronic Co Ltd | Power circuit of AC power supply |
| CN105811775B (en) * | 2016-03-10 | 2018-04-17 | 盐城工学院 | A kind of and tandem compound isolated converter transformer voltage ratio design method |
| CN106329938B (en) * | 2016-09-12 | 2019-10-18 | Oppo广东移动通信有限公司 | Switching Power Supply and its control method |
| CN109039111A (en) * | 2018-07-16 | 2018-12-18 | 深圳市安健科技股份有限公司 | A kind of boost rectifying circuit |
| CN113394972A (en) * | 2020-03-12 | 2021-09-14 | Oppo广东移动通信有限公司 | Power supply conversion circuit |
| CN116614004B (en) * | 2023-07-21 | 2024-01-16 | 深圳平创半导体有限公司 | Winding switching method and device applied to LLC high-frequency transformer |
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| CN1149352A (en) * | 1994-05-27 | 1997-05-07 | 井本成勋 | Electric adjuster |
| CN1192281A (en) * | 1995-08-01 | 1998-09-02 | 埃内科有限公司 | Method and device for continuous adjustment and regulation of a transformer turns ratio, and transformer provided with such a device |
| US6433321B1 (en) * | 2001-03-12 | 2002-08-13 | Samsung Electronics, Co. Ltd. | Microwave oven with high-power output switching means |
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| US5483436A (en) * | 1993-08-30 | 1996-01-09 | General Electric Company | Gate drive power supply operable from a source of unregulated DC electric power |
| US6246599B1 (en) * | 2000-08-25 | 2001-06-12 | Delta Electronics, Inc. | Constant frequency resonant inverters with a pair of resonant inductors |
| US6583999B1 (en) * | 2002-01-25 | 2003-06-24 | Appletec Ltd. | Low output voltage, high current, half-bridge, series-resonant, multiphase, DC-DC power supply |
| DE10218456A1 (en) * | 2002-04-25 | 2003-11-06 | Abb Patent Gmbh | Switching power supply arrangement |
| US6970366B2 (en) * | 2003-04-03 | 2005-11-29 | Power-One As | Phase-shifted resonant converter having reduced output ripple |
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2009
- 2009-04-15 TW TW098112442A patent/TWI382640B/en not_active IP Right Cessation
- 2009-08-25 CN CN2009101693567A patent/CN101997429B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149352A (en) * | 1994-05-27 | 1997-05-07 | 井本成勋 | Electric adjuster |
| CN1192281A (en) * | 1995-08-01 | 1998-09-02 | 埃内科有限公司 | Method and device for continuous adjustment and regulation of a transformer turns ratio, and transformer provided with such a device |
| US6433321B1 (en) * | 2001-03-12 | 2002-08-13 | Samsung Electronics, Co. Ltd. | Microwave oven with high-power output switching means |
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| JP特开平9-281148A 1997.10.31 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101997429A (en) | 2011-03-30 |
| TWI382640B (en) | 2013-01-11 |
| TW201037952A (en) | 2010-10-16 |
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