CN102638180B - Power converter - Google Patents
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- CN102638180B CN102638180B CN201210029670.7A CN201210029670A CN102638180B CN 102638180 B CN102638180 B CN 102638180B CN 201210029670 A CN201210029670 A CN 201210029670A CN 102638180 B CN102638180 B CN 102638180B
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Abstract
A power converter comprises a transformer, a diode array, a plurality of switching units, a control circuit and a filter circuit. The transformer converts the alternating voltage into a plurality of sub-alternating voltages. The diode array rectifies the sub alternating voltages to generate a plurality of rectified voltages. The first ends of the switching units receive the rectified voltages, and the second ends of the switching units are electrically connected with each other. The control circuit compares the rectified voltages with reference voltages respectively and selects a maximum rectified voltage or a minimum rectified voltage larger than the reference voltage from the rectified voltages. The control circuit also generates a plurality of switching signals according to the selection result so that the switching units transmit the maximum rectifying voltage or the minimum rectifying voltage which is larger than the reference voltage, and the filter circuit generates the direct-current voltage according to the maximum rectifying voltage or the minimum rectifying voltage.
Description
Technical field
The present invention relates to a kind of power supply changeover device, particularly relate to a kind of AC/DC power supply changeover device.
Background technology
Fig. 1 is the circuit diagram of existing AC/DC power supply changeover device (AC to DC power converter).With reference to Fig. 1, AC/DC power supply changeover device 100 utilizes transformer 110 to receive alternating voltage AC1, and carries out by this boosting or step-down.Afterwards, diode D11 and electric capacity C11 can carry out filtering and rectification to the signal after lifting/voltage reducing.In addition, inductance L 1 and interrupteur SW 1 by formation one voltage-regulating circuit, and under the control of the control circuit 120, carry out the adjustment of voltage level.Moreover signal will carry out filtering and rectification again by diode D12 and electric capacity C12, to produce the direct voltage DC1 needed for load 101.
In addition, in order to maintain the stability of output current, current-limiting circuit 130 flows through the size of the output current of load 101 in order to detect, and transmits a feedback signal S1 to control circuit 120 according to testing result.By this, control circuit 120 can carry out the adjustment of output current according to feedback signal S1.In other words, the voltage-regulating circuit that existing AC/DC power supply changeover device 100 can first be formed by inductance L 1 and interrupteur SW 1 carries out the adjustment of voltage level, is carried out the adjustment of output current afterwards again by current-limiting circuit 130 and voltage-regulating circuit.
But signal, when the voltage-regulating circuit formed by inductance L 1 and interrupteur SW 1 carries out the adjustment of voltage level and output current, will cause huge power consumption, and then reduce the conversion efficiency of AC/DC power supply changeover device 100.In addition, existing AC/DC power supply changeover device 100 has the problem of electromagnetic interference (electromagnetic interference is called for short EMI), and then impacts human body and internal circuit.
Summary of the invention
The invention provides a kind of power supply changeover device, utilize switch unit to transmit different commutating voltages in different time points, and then reach the adjustment of voltage level.By this, power supply changeover device need not configure the voltage-regulating circuit formed by inductance and switch, and then promote the conversion efficiency of power supply changeover device.
The present invention proposes a kind of power supply changeover device, comprises transformer, diode array, multiple switch unit, control circuit and filter circuit.Alternating voltage is converted to multiple sub-alternating voltage by transformer.Diode array is electrically connected transformer, and carries out rectification to this little alternating voltage, to produce multiple commutating voltage.The first end of these switch units receives these commutating voltages, and the second end of these switch units is electrical connected each other.On the other hand, these commutating voltages compare with a reference voltage by control circuit respectively.Wherein, when having plural commutating voltage and being greater than reference voltage, the minimum commutation voltage being greater than reference voltage picked out by control circuit from these commutating voltages, and control these switch units transmission minimum commutation voltage.In addition, when not having plural commutating voltage and being greater than reference voltage, a maximal integer mass flow voltage picked out by control circuit from these commutating voltages, and control these switch units transmission maximal integer mass flow voltage.Filter circuit carries out rectification and filtering, to produce direct voltage to the voltage from these switch units.
In one embodiment of this invention, above-mentioned power supply changeover device transmits direct voltage to load, and power supply changeover device also comprises Circuit tuning.Wherein, Circuit tuning is electrically connected load and filter circuit, and differentiates the size of direct voltage, to switch to charge mode, boost mode or normal mode.Wherein under charge mode, Circuit tuning utilizes direct voltage to charge.Under boost mode, Circuit tuning utilizes the electric charge of charging gained to improve the voltage level of direct voltage.In the normal mode, Circuit tuning stops charging and boosting.
Based on above-mentioned, the present invention utilizes switch unit to transmit different commutating voltages in different time points, and then the voltage causing switch unit to produce levels off to reference voltage.By this, power supply changeover device of the present invention need not configure the voltage-regulating circuit formed by inductance and switch, and then promote the conversion efficiency of power supply changeover device.In addition, when the direct voltage that power supply changeover device produces is too high or too low, the present invention also utilizes Circuit tuning to carry out charging or boosting, and then further promotes the conversion efficiency of power supply changeover device.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of existing AC/DC power supply changeover device;
Fig. 2 is the circuit diagram of the power supply changeover device according to one embodiment of the invention;
Fig. 3 is the waveform timing chart according to one embodiment of the invention;
Fig. 4 is the waveform timing chart according to another embodiment of the present invention;
Fig. 5 is the circuit diagram of the Circuit tuning according to one embodiment of the invention;
Fig. 6 is the circuit diagram of the Circuit tuning according to another embodiment of the present invention.
Reference numeral:
100: AC/DC power supply changeover device;
110: transformer;
120: control circuit;
130: current-limiting circuit;
D11, D12: diode;
C11, C12: electric capacity;
L1: inductance;
SW1: switch;
101: load;
AC1: alternating voltage;
DC1: direct voltage;
S1: feedback signal;
200: power supply changeover device;
AC2: alternating voltage;
DC2: direct voltage;
201: load;
210: transformer;
211: primary side;
212: secondary side;
N21 ~ N24: winding coil;
220: diode array;
D21 ~ D27: diode;
231 ~ 234: switch unit;
240: control circuit;
250: filter circuit;
260: Circuit tuning;
C21, C51 ~ C53, C61 ~ C63: electric capacity;
BV
21~ BV
24: sub-alternating voltage;
RV
21~ RV
24: commutating voltage;
S
21~ S
24: switching signal;
T41 ~ T43: cycle;
V
41: reference voltage;
V
42: voltage;
501,502,531 ~ 534,541 ~ 544,601,602,631 ~ 634,641 ~ 644: switch;
510,610: flow restricter;
520,620: signal generator;
530 ~ 540,630 ~ 640: boosting unit;
V
51, V
52, V
61, V
62: predeterminated voltage;
S51 ~ S60, S61 ~ S70: control signal.
Embodiment
Fig. 2 is the circuit diagram of the power supply changeover device according to one embodiment of the invention.With reference to Fig. 2, power supply changeover device 200 in order to convert alternating voltage AC2 to direct voltage DC2, to be supplied to the load 201 of rear end.In addition, power supply changeover device 200 comprises transformer 210, diode array 220, multiple switch unit 231 ~ 234, control circuit 240 and filter circuit 250.
Transformer 210 has primary side 211 and secondary side 212.Wherein, primary side 211 comprises winding coil N21, and winding coil N21 is in order to receive alternating voltage AC2.In addition, secondary side 212 comprises multiple winding coil.Such as, in the present embodiment, secondary side 212 comprises 3 winding coils (N=3), and winding coil N22 ~ N24 is in electrically upper serial connection mutually.That is, the second end of i-th winding coil is electrically connected the first end of (i+1) individual winding coil, and i is integer and 1≤i≤(N-1), N are positive integer.Moreover winding coil N22 ~ N24 can produce multiple sub-alternating voltage BV
21~ BV
24, therefore alternating voltage AC2 can be converted to multiple sub-alternating voltage BV by transformer 210
21~ BV
24.For example, Fig. 3 is the waveform timing chart according to one embodiment of the invention.As shown in Figure 3, transformer 210 receives alternating voltage AC2, and converts alternating voltage AC2 to sub-alternating voltage BV
21~ BV
24.
Diode array 220 is electrically connected the winding coil N22 ~ N24 of transformer 210.Further, diode array 220 comprises diode D21 ~ D26.Wherein, the anode of diode D21 ~ D23 is electrically connected the first end of winding coil N22 ~ N24, and the anode of diode D24 is electrically connected second end of winding coil N24.The negative electrode of diode D25 is electrically connected the first end of winding coil N22, and the anode of diode D25 is electrically connected to earth terminal.The negative electrode of diode D26 is electrically connected second end of winding coil N24, and the anode of diode D26 is electrically connected to earth terminal.
Operationally, diode array 220 can antithetical phrase alternating voltage BV
21~ BV
24 carry out rectification, and produce multiple commutating voltage RV by the negative electrode of diode D21 ~ D24
21~ RV
24.For example, Fig. 4 is the waveform timing chart according to another embodiment of the present invention.As shown in Figure 4, in cycle T 41, diode array 220 can with second end of winding coil N24 for earth terminal.Therefore, in cycle T 41, the voltage level of commutating voltage is respectively commutating voltage RV from high to low
21, RV
22, RV
23.In addition, in cycle T 42, diode array 220 can with the first end of winding coil N22 for earth terminal.Therefore, in cycle T 42, the voltage level of commutating voltage is respectively commutating voltage RV from high to low
24, RV
23, RV
22.Similarly, in cycle T 43, diode array 220 can again with second end of winding coil N24 for earth terminal, and produce voltage level commutating voltage RV from high to low
21, RV
22, RV
23.
The first end of switch unit 231 ~ 234 receives commutating voltage RV
21~ RV
24, and the second end of switch unit 231 ~ 234 is electrical connected each other.On the other hand, control circuit 240 is by commutating voltage RV
21~ RV
24compare with a reference voltage respectively, and from commutating voltage RV
21~ RV
24in pick out a maximal integer mass flow voltage or be greater than a minimum commutation voltage of reference voltage.In addition, control circuit 240 can produce multiple switching signal S according to selecting result
21~ S
24.By this, switch unit 231 ~ 234 will according to switching signal S
21~ S
24adjust the conducting state between its first end and the second end, and transmit maximal integer mass flow voltage or the minimum commutation voltage when being greater than reference voltage to filter circuit 250.
For example, as shown in Figure 4, wherein V
41for reference voltage, and V
42for switch unit 231 ~ 234 is sent to the voltage of filter circuit 250.At this, for the commutating voltage in cycle T 41, commutating voltage RV at the beginning
21~ RV
23all be less than reference voltage V
41, therefore control circuit 240 can select commutating voltage RV
21for maximal integer mass flow voltage, and produce corresponding switching signal S
21~ S
24, transmit maximal integer mass flow voltage RV to cause switch unit 231 ~ 234
21.Afterwards, as commutating voltage RV
21, RV
22all be greater than reference voltage V
41time, control circuit 240 can from commutating voltage RV
21, RV
22in pick out commutating voltage RV
22as minimum commutation voltage, and produce corresponding switching signal S
21~ S
24, transmit minimum commutation voltage RV to cause switch unit 231 ~ 234
22.
Moreover, as commutating voltage RV
21, RV
22, RV
23all be greater than reference voltage V
41time, control circuit 240 can from commutating voltage RV
21, RV
22, RV
23in select commutating voltage RV
23as minimum commutation voltage RV
23, and produce corresponding switching signal S
21~ S
24, transmit minimum commutation voltage RV to cause switch unit 231 ~ 234
23.In other words, whether control circuit 240 can differentiate has the commutating voltage of more than 2 to be greater than reference voltage V
41.In addition, when not having the commutating voltage of more than 2 to be greater than reference voltage V
41time, then control circuit 240 can select maximal integer mass flow voltage, and controls switch unit 231 ~ 234 transmission maximal integer mass flow voltage.Otherwise, when the commutating voltage with more than 2 is greater than reference voltage V
41time, control circuit 240 can from being greater than reference voltage V
41multiple commutating voltages in, pick out minimum commutation voltage, and control switch unit 231 ~ 234 and transmit minimum commutation voltage.
Thus, in cycle T 41, along with commutating voltage RV
21~ RV
23continuous rising, switch unit 231 ~ 234 will sequentially transmit voltage level commutating voltage RV from high to low
21, RV
22, RV
23.In addition, in cycle T 41, along with commutating voltage RV
21~ RV
23continuous reduction, switch unit 231 ~ 234 will sequentially transmit voltage level commutating voltage RV from low to high
23, RV
22, RV
21.By this, the voltage V of filter circuit 250 is sent to
42to level off to reference voltage V
41.Therefore, filter circuit 250 is to voltage V
42direct voltage DC2 can be produced after carrying out filtering.
It is worth mentioning that, with the AC/DC power supply changeover device 100 of Fig. 1 in comparison, power supply changeover device 200 need not configure the adjustment that the voltage-regulating circuit formed by inductance and switch can carry out voltage level, and therefore power supply changeover device 200 has preferably conversion efficiency.In addition, with the AC/DC power supply changeover device 100 of Fig. 1 in comparison, power supply changeover device 200 has lower electromagnetic interference, and then avoids impacting human body and its internal circuit.
Continue referring to Fig. 2, filter circuit 250 comprises diode D27 and electric capacity C21.Wherein, the anode of diode D27 is electrically connected the second end of switch unit 231 ~ 234, and the negative electrode of diode D27 produces direct voltage DC2.The first end of electric capacity C21 is electrically connected the negative electrode of diode D27, and second end of electric capacity C21 is electrically connected to earth terminal.At this, although Fig. 2 embodiment lists the thin portion circuit of filter circuit 250, this area has knows that the knowledgeable also can according to design, the thin portion circuit of change filter circuit 250 usually.Such as, filter circuit 250 also can be made up of single electric capacity C21.
Further, power supply changeover device 200 also comprises Circuit tuning 260.Wherein, Circuit tuning 260 is electrically connected to load 201 and filter circuit 250.Operationally, Circuit tuning 260 can differentiate the size of direct voltage DC2, to switch to a charge mode, a boost mode or a normal mode.Wherein, under charge mode, Circuit tuning 260 can utilize direct voltage DC2 to charge.Under boost mode, Circuit tuning 260 can utilize the electric charge of charging gained to improve the voltage level of direct voltage DC2.Moreover in the normal mode, Circuit tuning 260 can stop charging and boosting, and mainly in order to limit the electric current flowing through load 201.
Thus, when direct voltage DC2 is too high, Circuit tuning 260 can switch to charge mode, charges to utilize too high direct voltage DC2.Relatively, when direct voltage DC2 is too low, Circuit tuning 260 can switch to boost mode, improves direct voltage DC2 to utilize the electric charge of charging gained.In addition, when direct voltage DC2 stablizes, Circuit tuning 260 will switch to normal mode, to limit the electric current flowing through load 201.By this, direct voltage DC2 can again be utilized, and then contribute to the conversion efficiency promoting power supply changeover device 200.
In order to cause those of ordinary skill in the art more can understand the present embodiment, the circuit framework of Circuit tuning 260 will be enumerated below.Fig. 5 is the circuit diagram of Circuit tuning according to one embodiment of the invention, wherein for convenience of description for the purpose of, Fig. 5 also demonstrates load 201.With reference to Fig. 5, Circuit tuning 260 comprises switch 501, switch 502, electric capacity C51, flow restricter 510, signal generator 520 and multiple boosting unit 530 ~ 540.
In overall architecture, the first end of switch 501 is electrically connected load 201.Flow restricter 510 is electrically connected between the second end of switch 501 and earth terminal.The first end of electric capacity C51 receives direct voltage DC2.Switch 502 is electrically connected between second end of electric capacity C51 and earth terminal.Signal generator 520 is electrically connected switch 501.Boosting unit 530 is electrically connected load 201, second end of electric capacity C51, the second end of switch 501 and earth terminal.In addition, boosting unit 540 is electrically connected load 201, boosting unit 530, the second end of switch 501 and earth terminal.
Operationally, the first end of switch 501 and the second end produce predeterminated voltage V respectively
51with V
52.In addition, signal generator 520 can according to predeterminated voltage V
51with V
52differentiate the size of direct voltage DC2, and according to differentiating that result carries out the switching of the pattern of Circuit tuning 260.In addition, signal generator 520 can produce different control signal S51 ~ S60 in different patterns, with control switch 501, switch 502 and boosting unit 530 ~ 540.Wherein, switch 501 and 502 is controlled by the control signal S that signal generator 520 produces respectively
51with S
52.
By this, when Circuit tuning 260 switches to normal mode, only switch 501 and 502 is switched on.Now, flow restricter 510 receives the electric current from load 201 by switch 501, and flow restricter 510 can limit the size flowing through its internal current.On the other hand, when Circuit tuning 260 switches to charge mode, direct voltage DC2 is optionally stored to boosting unit 530 ~ 540 by Circuit tuning 260.Otherwise when Circuit tuning 260 switches to boost mode, Circuit tuning 260 optionally utilizes boosting unit 530 ~ 540 to improve direct voltage DC2.Therefore, in practical application, Circuit tuning 260 only can configure single boosting unit 530, or configures multiple boosting unit 530 ~ 540 simultaneously.
For example, in Fig. 5 embodiment, boosting unit 530 comprises switch 531 ~ 534 and electric capacity C52.Wherein, the first end of switch 531 and 532 is electrically connected the second end and the load 201 of electric capacity C51 respectively, and the second end of switch 531 and 532 is then all electrically connected to the first end of electric capacity C52.In addition, the first end of switch 533 and 534 is all electrically connected to second end of electric capacity C52, and the second end of switch 533 and 534 is electrically connected the second end and the earth terminal of switch 501 respectively.In addition, switch 531 ~ 534 is controlled by the control signal S that signal generator 520 produces respectively
53~ S
56.
Moreover boosting unit 540 comprises switch 541 ~ 544 and electric capacity C53.Wherein, the first end of switch 541 and 542 is electrically connected the second end and the load 201 of electric capacity C52 respectively, and the second end of switch 541 and 542 is then all electrically connected to the first end of electric capacity C53.In addition, the first end of switch 543 and 544 is all electrically connected to second end of electric capacity C53, and the second end of switch 543 and 544 is electrically connected the second end and the earth terminal of switch 501 respectively.In addition, switch 541 ~ 544 is controlled by the control signal S that signal generator 520 produces respectively
57~ S
60.
In practical application, if when Circuit tuning 260 only configures single boosting unit 530 or only utilizes boosting unit 530 to boost, then operation when Circuit tuning 260 switches to different mode is by as follows.Wherein, under charge mode, switch 532 and 533 conducting in boosting unit 530, and the neither conducting of remaining switch.By this, load 201, electric capacity C52, to be mutually connected in series to earth terminal in electrically upper with flow restricter 510, and then to cause electric capacity C52 to charge.In addition, under boost mode, switch 501 conducting, switch 531 and 534 conducting in boosting unit 530, and the neither conducting of remaining switch.By this, electric capacity C51 is connected in series to earth terminal in electrically upper mutually with electric capacity C52, and then improves the voltage level of direct voltage DC2.In the normal mode, switch 501 and 502 conducting, and the neither conducting of remaining switch.By this, the two ends of electric capacity C52 are all in floating, and then cause boosting unit 530 to stop charging and boosting.
Moreover if Circuit tuning 260 configures multiple boosting unit 530 ~ 540, and when utilizing multiple boosting unit 530 ~ 540 to boost, then operation when Circuit tuning 260 switches to different mode is by as follows.Under charge mode, when first order electric capacity C52 is charged, switch 532 and 533 conducting in boosting unit 530, the neither conducting of remaining switch; By this, load 201, electric capacity C52, to be mutually connected in series to earth terminal in electrically upper with flow restricter 510, and then to cause electric capacity C52 to charge.When second level electric capacity C53 is charged, switch 542 and 543 conducting in boosting unit 540, and the neither conducting of remaining switch.By this, load 201, electric capacity C53, to be mutually connected in series to earth terminal in electrically upper with flow restricter 510, and then to cause electric capacity C53 to charge.
In addition, under first class boost pattern, switch 501 conducting, switch 531 and 534 conducting in boosting unit 530, the neither conducting of remaining switch, that is, now the successive fashion of switch is identical with successive fashion when only having single boosting unit.Under multistage boost mode, for two-stage boosting, switch 531 conducting in boosting unit 530, switch 541 and 544 conducting in boosting unit 540, switch 501 conducting, and the neither conducting of remaining switch.By this, electric capacity C51, electric capacity C52 are connected in series to earth terminal in electrically upper mutually with electric capacity C53, and then improve the voltage level of direct voltage DC2.Moreover, in the normal mode, switch 501 and 502 conducting, and the neither conducting of remaining switch.By this, the two ends of electric capacity C52 and C53 are all in floating, and then cause boosting unit 530 ~ 540 to stop charging and boosting.
Fig. 6 is the circuit diagram of Circuit tuning according to another embodiment of the present invention, wherein for convenience of description for the purpose of, Fig. 6 also demonstrates load 201.With reference to Fig. 6, Circuit tuning 260 comprises switch 601, switch 602, electric capacity C61, flow restricter 610, signal generator 620 and multiple boosting unit 630 ~ 640.In addition, boosting unit 630 comprises switch 631 ~ 634 and electric capacity C62, and boosting unit 640 comprises switch 641 ~ 644 and electric capacity C63.
The circuit framework of the switch 601 in Fig. 6 embodiment, switch 602, electric capacity C61, flow restricter 610, signal generator 620 and boosting unit 630 is all identical or similar with the circuit framework of the switch 501 in Fig. 5 embodiment, switch 502, electric capacity C51, flow restricter 510, signal generator 520 and boosting unit 530.Therefore, with Fig. 5 embodiment similarly, first end and second end of switch 601 produce predeterminated voltage V respectively
61with V
62.In addition, signal generator 620 can according to predeterminated voltage V
61with V
62differentiate the size of direct voltage DC2, and according to differentiating that result carries out the switching of the pattern of Circuit tuning 260.In addition, signal generator 620 can produce different control signal S61 ~ S70 in different patterns, with control switch 601, switch 602 and boosting unit 630 ~ 640.
At this, the maximum difference of Fig. 6 and Fig. 5 embodiment is, the boosting unit 640 in Fig. 6 embodiment can not be electrically connected to the boosting unit 630 of previous stage, but parallel with one another with the boosting unit 630 of previous stage.Therefore, in practical application, if Circuit tuning 260 configures multiple boosting unit 630 ~ 640, and when utilizing multiple boosting unit 630 ~ 640 to boost, then operation when Circuit tuning 260 switches to boost mode is by as follows.Now, switch 601 conducting, switch 631 and 634 conducting in boosting unit 630, switch 641 and 644 conducting in boosting unit 640, and the neither conducting of remaining switch.By this, electric capacity C62 and C63 is parallel with one another, and electric capacity C61 contacts mutually with electric capacity C62, C63 respectively, and then improves the voltage level of direct voltage DC2.Thin portion operation as Fig. 6 embodiment has been included in Fig. 5 embodiment, therefore does not repeat them here.
In sum, the present invention utilizes switch unit to transmit different commutating voltages in different time points, and then the voltage causing switch unit to produce levels off to a reference voltage.By this, power supply changeover device of the present invention need not configure the adjustment that the voltage-regulating circuit formed by inductance and switch can carry out voltage level, and then promote the conversion efficiency of power supply changeover device.In addition, when the direct voltage that power supply changeover device produces is too high or too low, the present invention also utilizes Circuit tuning to carry out charging or boosting, and then further promotes the conversion efficiency of power supply changeover device.
Although the present invention with embodiment disclose as above, so itself and be not used to limit the present invention, any person of an ordinary skill in the technical field, when doing a little change and retouching, and does not depart from the spirit and scope of the present invention.
Claims (11)
1. a power supply changeover device, comprising:
One transformer, converts an alternating voltage to multiple sub-alternating voltage;
One diode array, is electrically connected this transformer, and carries out rectification to this little alternating voltage, to produce multiple commutating voltage;
Multiple switch unit, wherein the first end of those switch units receives those commutating voltages, and the second end of those switch units is electrical connected each other;
One control circuit, those commutating voltages are compared with a reference voltage respectively, wherein when there is plural commutating voltage and being greater than this reference voltage, the minimum commutation voltage being greater than this reference voltage picked out by this control circuit from those commutating voltages, and control those switch units and transmit this minimum commutation voltage, when not there is plural commutating voltage and being greater than this reference voltage, a maximal integer mass flow voltage picked out by this control circuit from those commutating voltages, and control those switch units and transmit this maximal integer mass flow voltage; And
One filter circuit, carries out filtering to the voltage from those switch units, and to produce a direct voltage, wherein this power supply changeover device transmits this direct voltage to one load; And
One Circuit tuning, be electrically connected this load and this filter circuit, and differentiate the size of this direct voltage, to switch to a charge mode, a boost mode or a normal mode, wherein under this charge mode, this Circuit tuning utilizes this direct voltage to charge, under this boost mode, this Circuit tuning utilizes the electric charge of charging gained to improve the voltage level of this direct voltage, and under this normal mode, this Circuit tuning stops charging and boosting.
2. power supply changeover device according to claim 1, wherein this transformer has a primary side and a secondary side, this primary side receives this alternating voltage, this secondary side comprises N number of winding coil, second end of i-th winding coil is electrically connected the first end of (i+1) individual winding coil, and those winding coils produce this little alternating voltage, N is positive integer, and i is integer and 1≤i≤(N-1).
3. power supply changeover device according to claim 2, wherein this diode array comprises:
(N+1) individual first diode, wherein the anode of jth the first diode is electrically connected the first end of a jth winding coil, j is integer and 1≤j≤N, the anode of (N+1) individual first diode is electrically connected the second end of N number of winding coil, and the negative electrode of described (N+1) individual first diode produces those commutating voltages;
One second diode, its negative electrode is electrically connected the first end of the 1st winding coil, and the anode of this second diode is electrically connected to an earth terminal; And
One the 3rd diode, its negative electrode is electrically connected the second end of N number of winding coil, and the anode of the 3rd diode is electrically connected to this earth terminal.
4. power supply changeover device according to claim 1, wherein this filter circuit comprises:
One first electric capacity, its first end is electrically connected the second end of those switch units, and the second end of this first electric capacity is electrically connected to an earth terminal, and the first end of this first electric capacity produces this direct voltage.
5. power supply changeover device according to claim 4, wherein this filter circuit also comprises:
One the 4th diode, its anode is electrically connected the second end of those switch units, and the negative electrode of the 4th diode is electrically connected the second end of this first electric capacity.
6. power supply changeover device according to claim 1, wherein this Circuit tuning comprises:
One first switch, its first end is electrically connected this load, and the first end of this first switch and the second end produce one first predeterminated voltage and one second predeterminated voltage respectively;
One flow restricter, is electrically connected between the second end of this first switch and an earth terminal, and restriction flows through the size of an internal current of this flow restricter;
One second electric capacity, its first end receives this direct voltage;
One second switch, is electrically connected between the second end of this second electric capacity and this earth terminal;
One first boosting unit, comprises one the 3rd electric capacity; And
One signal generator, the size of this direct voltage is differentiated according to this first predeterminated voltage and this second predeterminated voltage, to carry out the switching of the pattern of this Circuit tuning, and this signal generator is in order to control this first switch, this second switch and this first boosting unit
Wherein, under this charge mode, this first switch and this second switch not conducting, and this load, the 3rd electric capacity and this flow restricter are connected in series, under this boost mode mutually in electrically upper, this first switch conduction, this second switch not conducting, and this second electric capacity is connected in series, under this normal mode in electrically upper mutually with the 3rd electric capacity, this first switch and this second switch conducting, and the two ends of the 3rd electric capacity are all in a floating.
7. power supply changeover device according to claim 6, wherein this first boosting unit also comprises:
One the 3rd switch, its first end is electrically connected the second end of this second electric capacity, and the second end of the 3rd switch is electrically connected the first end of the 3rd electric capacity;
One the 4th switch, its first end is electrically connected this load, and the second end of the 4th switch is electrically connected the first end of the 3rd electric capacity;
One the 5th switch, its first end is electrically connected the second end of the 3rd electric capacity, and the second end of the 5th switch is electrically connected the second end of this first switch; And
One the 6th switch, its first end is electrically connected the second end of the 3rd electric capacity, and the second end of the 6th switch is electrically connected to earth terminal.
8. power supply changeover device according to claim 6, wherein this Circuit tuning also comprises:
One second boosting unit, comprise one the 4th electric capacity, and be controlled by this signal generator, wherein, under this charge mode, the 4th electric capacity, this load are connected in series in electrically upper mutually with this flow restricter, under this boost mode, 4th electric capacity, this second electric capacity are connected in series in electrically upper mutually with the 3rd electric capacity, and under this normal mode, the two ends of the 4th electric capacity are all in this floating.
9. power supply changeover device according to claim 8, wherein this second boosting unit also comprises:
One the 7th switch, its first end is electrically connected this first boosting unit, and the second end of the 7th switch is electrically connected the first end of the 4th electric capacity;
One the 8th switch, its first end is electrically connected this load, and the second end of the 8th switch is electrically connected the first end of the 4th electric capacity;
One the 9th switch, its first end is electrically connected the second end of the 4th electric capacity, and the second end of the 9th switch is electrically connected the second end of this first switch; And
The tenth switch, its first end is electrically connected the second end of the 4th electric capacity, and the second end of the tenth switch is electrically connected to earth terminal.
10. power supply changeover device according to claim 6, wherein this Circuit tuning also comprises:
One the 3rd boosting unit, comprise one the 5th electric capacity, and be controlled by this signal generator, wherein, under this charge mode, the 5th electric capacity, this load are connected in series in electrically upper mutually with this flow restricter, under this boost mode, 5th electric capacity is connected in series in electrically upper mutually with this second electric capacity, and under this normal mode, the two ends of the 5th electric capacity are all in this floating.
11. power supply changeover devices according to claim 10, wherein the 3rd boosting unit also comprises:
The 11 switch, its first end is electrically connected the second end of this second electric capacity, and the second end of the 11 switch is electrically connected the first end of the 5th electric capacity;
One twelvemo is closed, and its first end is electrically connected this load, and the second end that this twelvemo is closed is electrically connected the first end of the 5th electric capacity;
The 13 switch, its first end is electrically connected the second end of the 5th electric capacity, and the second end of the 13 switch is electrically connected the second end of this first switch; And
The 14 switch, its first end is electrically connected the second end of the 5th electric capacity, and the second end of the 14 switch is electrically connected to earth terminal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100104562 | 2011-02-11 | ||
| TW100104562A TWI430556B (en) | 2011-02-11 | 2011-02-11 | Power converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102638180A CN102638180A (en) | 2012-08-15 |
| CN102638180B true CN102638180B (en) | 2014-12-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210029670.7A Expired - Fee Related CN102638180B (en) | 2011-02-11 | 2012-02-10 | Power converter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102638180B (en) |
| TW (1) | TWI430556B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI695560B (en) * | 2018-06-15 | 2020-06-01 | 群光電能科技股份有限公司 | Power supply system and power converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4712171A (en) * | 1985-03-15 | 1987-12-08 | Uniqey (Hong Kong) Limited | Electrical power source |
| GB2238635A (en) * | 1989-11-27 | 1991-06-05 | Uniqey | A regulated power supply |
| US6038150A (en) * | 1997-07-23 | 2000-03-14 | Yee; Hsian-Pei | Transistorized rectifier for a multiple output converter |
| CN101167241A (en) * | 2005-04-26 | 2008-04-23 | 皇家飞利浦电子股份有限公司 | Resonant dc/dc converter with zero current switching |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003189616A (en) * | 2001-12-17 | 2003-07-04 | Sony Corp | Switching power circuit |
-
2011
- 2011-02-11 TW TW100104562A patent/TWI430556B/en not_active IP Right Cessation
-
2012
- 2012-02-10 CN CN201210029670.7A patent/CN102638180B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4712171A (en) * | 1985-03-15 | 1987-12-08 | Uniqey (Hong Kong) Limited | Electrical power source |
| GB2238635A (en) * | 1989-11-27 | 1991-06-05 | Uniqey | A regulated power supply |
| US6038150A (en) * | 1997-07-23 | 2000-03-14 | Yee; Hsian-Pei | Transistorized rectifier for a multiple output converter |
| CN101167241A (en) * | 2005-04-26 | 2008-04-23 | 皇家飞利浦电子股份有限公司 | Resonant dc/dc converter with zero current switching |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201234755A (en) | 2012-08-16 |
| TWI430556B (en) | 2014-03-11 |
| CN102638180A (en) | 2012-08-15 |
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