CN103683987A - Rectification circuit - Google Patents
Rectification circuit Download PDFInfo
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- CN103683987A CN103683987A CN201210322912.1A CN201210322912A CN103683987A CN 103683987 A CN103683987 A CN 103683987A CN 201210322912 A CN201210322912 A CN 201210322912A CN 103683987 A CN103683987 A CN 103683987A
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Abstract
The invention relates to a rectification circuit. The rectification circuit comprises a first voltage output end, a second voltage output end, a first energy storage unit, a second energy storage unit, a first alternating voltage output end, a second alternating voltage output end, a third alternating voltage output end, a public output end, a first rectification branch circuit, a second rectification branch circuit, a third rectification branch circuit and a signal generating unit, wherein the first energy storage unit and the second energy storage unit are connected in series between the first voltage output end and the second voltage output end, and used for driving a load; the first alternating voltage output end, the second alternating voltage output end and the third alternating voltage output end and the public output end are used for outputting alternating voltages with different phases, and the public output end is connected with a node between the first energy storage unit and the second energy storage unit; the first rectification branch circuit, the second rectification branch circuit and the third rectification branch circuit are respectively connected among the alternating voltage output ends and the public output end; the signal generating unit is used for driving each rectification branch circuit, controlling the each rectification branch circuit to only charge the second energy storage unit within a positive semi-period and only charge the first energy storage unit within a negative semi-period.
Description
Technical field
The present invention relates to a kind of rectification circuit, especially a kind of rectification circuit that possesses power factor correction (Power Factor Correction) function.
Background technology
At present, when the three-phase alternating current that Utilities Electric Co. produces is converted to civilian direct current, conventionally the electric power system of three-phase is taken into apart to three groups of single phase alternating current (A.C.) electric power systems.In every group of single phase alternating current (A.C.) electric power system, first through rectification circuit separately, single phase alternating current (A.C.) voltage is converted to direct voltage.Conventional rectification circuit mainly contains booster type circuit framework (Boost) or the anti-type framework of speeding (Fly back).Yet, when being converted to direct voltage by alternating voltage, booster type circuit framework the magnitude of voltage of direct voltage can be raise, and cause most of civil electric appliances cannot use because of its overtension.Therefore, this booster type circuit framework need to coordinate other reduction voltage circuit can be converted to the direct voltage that civil electric appliance can be used.Thereby booster type circuit framework cost is higher, voltage transitions efficiency is lower.And the anti-type framework of speeding needs one group of transformer carry out electric power conversion, cause voltage transitions efficiency compared with low and be not suitable for powerful occasion.
Summary of the invention
For the problems referred to above, be necessary to provide the rectification circuit that a kind of cost is lower and conversion efficiency is higher.
A rectification circuit, it comprises: the first voltage output end and second voltage output; Be connected between the first voltage output end and second voltage output for driving the first energy-storage units and second energy-storage units of load; For exporting first, second, third ac voltage output and the public output of out of phase alternating voltage, this public output connects the node between the first energy-storage units and the second energy-storage units; Be connected to the first rectification branch road, the second rectification branch road and the 3rd rectification branch road between ac voltage output and public output; And drive the signal generation unit of each rectification branch road, this signal generation unit control each rectification branch road at positive half period only to the second energy-storage units charging, at negative half-cycle only to the first energy-storage units charging.
A kind of rectification circuit, it comprises three-phase alternating-current supply, the first rectification branch road, the second rectification branch road, the 3rd rectification branch road, the first energy-storage units, the second energy-storage units, signal generation unit, the first voltage output end and second voltage output, this three-phase alternating-current supply is for generation of the first alternating voltage, the second alternating voltage and the 3rd alternating voltage, this the first rectification branch road, under the control of the control signal that this second rectification branch road and the 3rd rectification branch road produce at this signal generation unit respectively by this first alternating voltage, this second alternating voltage and the 3rd alternating voltage convert direct voltage to, each rectification branch road only charges to one of two energy-storage units at positive half period, at negative half-cycle, only another of two energy-storage units charged, this first voltage output end is connected this first energy-storage units and this second energy-storage units successively to second voltage output, to drive, be connected to first, load between second voltage output
Compare with prior art, rectification circuit of the present invention does not need through electric power repeatedly conversion three-phase alternating voltage can be converted to drive the required direct voltage of load, and therefore, conversion efficiency and the stability of this rectification circuit are higher.In addition, this rectification circuit does not need transformer to isolate, and therefore, this rectification circuit cost is lower, and in addition, this rectification circuit and load earth connection can share, and wiring is simple.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of rectification circuit one preferred embodiment of the present invention.
Fig. 2 is the signal generation unit schematic diagram that the rectification circuit shown in Fig. 1 of the present invention provides control signal.
Fig. 3 is the electrical block diagram of the first rectification branch road that shown in Fig. 1 of the present invention, rectification circuit adopts.
Fig. 4 is the waveform schematic diagram of the first alternating voltage in the present invention, the second alternating voltage and the 3rd alternating voltage.
Main element symbol description
| Rectification circuit | 1 |
| Three-phase alternating- |
10 |
| The first |
20 |
| The second |
30 |
| The 3rd |
40 |
| The first energy- |
50 |
| The second energy- |
60 |
| The first |
70 |
| |
80 |
| The first |
11 |
| The second |
12 |
| The 3rd |
13 |
| |
14 |
| The |
21 |
| |
22 |
| The first |
23 |
| The |
24 |
| The first one- |
25 |
| The second one- |
26 |
| The |
27 |
| The first |
211 |
| The positive conduction terminal of the |
212 |
| The first switch is born |
213 |
| Second |
221 |
| The positive conduction terminal of |
222 |
| Second switch is born |
223 |
| The 3rd |
241 |
| The positive conduction terminal of the |
242 |
| The 3rd switch is born |
243 |
| The 4th |
271 |
| The positive conduction terminal of the |
272 |
| The 4th switch is born |
273 |
| |
251 |
| The |
252 |
| The |
261 |
| The |
262 |
| Signal generation unit | 90 |
| The first control signal output | 91 |
| The second control signal output | 92 |
| The 3rd control signal output | 93 |
| The 4th control signal output | 94 |
| The 5th control signal output | 95 |
| The 6th control signal output | 96 |
| The 7th control signal output | 97 |
| The 8th control signal output | 98 |
| The 9th control signal output | 99 |
| The tenth control signal output | 910 |
| The 11 control signal output | 911 |
| The 12 control signal output | 912 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
See also Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is the circuit diagram of rectification circuit one preferred embodiment of the present invention.Fig. 2 provides the schematic diagram of the signal generation unit of control signal for the rectification circuit shown in Fig. 1.Fig. 3 is the electrical block diagram of the first rectification branch road that shown in Fig. 1 of the present invention, rectification circuit adopts.In the present embodiment, rectification circuit 1 comprises three-phase alternating-current supply 10, the first rectification branch road 20, the second rectification branch road 30, the 3rd rectification branch road 40, the first energy-storage units 50, the second energy-storage units 60, the first voltage output end 70, second voltage output 80 and for controlling the signal generation unit 90 of each rectification branch road.
This three-phase alternating-current supply 10 is for generation of three-phase alternating voltage, and it comprises the first ac voltage output 11, the second ac voltage output 12, the 3rd ac voltage output 13 and public output 14.This first ac voltage output 11, this second ac voltage output 12 and the 3rd ac voltage output 13 are respectively used to export the first alternating voltage, the second alternating voltage and the 3rd alternating voltage.
This signal generation unit 90 comprises the first control signal output 91, the second control signal output 92, the 3rd control signal output 93, the 4th control signal output 94, the 5th control signal output 95, the 6th control signal output 96, the 7th control signal output 97, the 8th control signal output 98, the 9th control signal output 99, the tenth control signal output 910, the 11 control signal output 911 and the 12 control signal output 912, be respectively used to export the first control signal ctr1, the second control signal ctr2, the 3rd control signal ctr3, the 4th control signal ctr4, the 5th control signal ctr5, the 6th control signal ctr6, the 7th control signal ctr7, the 8th control signal ctr8, the 9th control signal ctr9, the tenth control signal ctr10, the 11 control signal ctr11 and the 12 control signal ctr12.These 12 control signals are PMW (Pulse Width Modulation) control signal.Alternatively, this first control signal is controlled this first switch element 21 to open closed frequency is 50KHZ.The frequency of this first alternating voltage is 60HZ.Preferably, the frequency of this first control signal is the integral multiple of the frequency of this first alternating voltage.
In present embodiment, this first rectification branch road 20, this second rectification branch road 30 and the 3rd rectification branch road 40 comprise identical assembly, and the annexation of inner each assembly of each rectification branch road is identical.At this, take this first rectification branch road 20 operation principle of this rectification circuit to be described as example.As shown in Figure 3, this first rectification branch road 20, this second rectification branch road 30 and the 3rd rectification branch road 40 comprise respectively the first switch element 21, second switch unit 22, the first energy storage subelement 23, the 3rd switch element 24, the first one-way conduction unit 25, the second one-way conduction unit 26 and the 4th switch element 27.This first switch element 21, this second switch unit 22, the 3rd switch element 24, the 4th switch element 27 comprise respectively control end, positive conduction terminal and negative conduction terminal.For convenience of description, the control end of this first, second, third, fourth switch element 21,22,24,27 is defined as respectively to the first switch control end 211, second switch control end 221, the 3rd switch control end 241 and the 4th switch control end 271.The positive conduction terminal of this first, second, third, fourth switch element 21,22,24,27 is defined as respectively to the positive conduction terminal 212 of the first switch, the positive conduction terminal 222 of second switch, the positive conduction terminal 242 of the 3rd switch and the positive conduction terminal 272 of the 4th switch.The negative conduction terminal of this first, second, third, fourth switch element 21,22,24,27 is defined as respectively to the negative conduction terminal 213 of the first switch, the negative conduction terminal 223 of second switch, the negative conduction terminal 243 of the 3rd switch and the negative conduction terminal 273 of the 4th switch.
This first one-way conduction unit 25 comprises first end 251 and the second end 252.This second one-way conduction unit 26 comprises the 3rd end 261 and the 4th end 262.
The positive conduction terminal 212 of this first switch of the positive conduction terminal 212 of this first switch of this first rectification branch road 20, the positive conduction terminal 212 of this first switch of this second rectification branch road 30 and the 3rd rectification branch road 40 is respectively as the input of this first rectification branch road 20, this second rectification branch road 30 and the 3rd rectification branch road 40, corresponding this first ac voltage output 11, this second ac voltage output 12 and the 3rd ac voltage output 13 of connecting, to receive respectively this first alternating voltage, this second alternating voltage and the 3rd alternating voltage.
The negative conduction terminal 213 of this first switch is connected the negative conduction terminal 223 of this second switch, the positive conduction terminal 222 of this second switch, this first energy storage subelement 23 successively to this public output 14.The negative conduction terminal 243 of the 3rd switch connects the positive conduction terminal 242 of positive conduction terminal 222, the three switch of this second switch and connects successively this first end 251 and this second end 252 to this first voltage output end 70.The 4th end 262 connects positive conduction terminal 222, the three ends 261 of this second switch and connects successively the positive conduction terminal 272 of the 4th switch and the negative conduction terminal 273 of the 4th switch to this second voltage output 80 ground connection.
This first switch control end 211 connects this first control signal output 91, be used for receiving the first control signal ctr1, and under the control of this first control signal ctr1, control the positive conduction terminal 212 of this first switch and negative conduction terminal 213 conductings of this first switch or cut-off.This second switch control end 221 connects this second control signal output 92, be used for receiving the second control signal ctr2, and under the control of this second control signal ctr2, control the positive conduction terminal 222 of this second switch and negative conduction terminal 223 conductings of second switch or cut-off.The 3rd switch control end 241 connects the 3rd control signal output 93, be used for receiving the 3rd control signal ctr3, and under the control of the 3rd control signal ctr3, control the positive conduction terminal 242 of the 3rd switch and negative conduction terminal 243 conductings of the 3rd switch or cut-off.The 4th switch control end 271 connects the 4th control signal output 94, be used for receiving the 4th control signal ctr4, and under the control of the 4th control signal ctr4, control the positive conduction terminal 272 of the 4th switch and negative conduction terminal 273 conductings of the 4th switch or cut-off.
When these the first switch element 21 conductings and this second switch unit 22 conductings and the 3rd switch element 24 cut-offs and the 4th switch element 27 cut-off, these the first one-way conduction unit 25 cut-offs.When these the first switch element 21 cut-offs and 22 cut-offs of this second switch unit and the 3rd switch element 24 conductings and the 4th switch element 27 cut-off, these the first one-way conduction unit 25 conductings.
When these the first switch element 21 conductings and this second switch unit 22 conductings and the 3rd switch element 24 cut-offs and the 4th switch element 27 cut-off, these the second one-way conduction unit 26 cut-offs.When these the first switch element 21 cut-offs and 22 cut-offs of this second switch unit and the 3rd switch element 24 cut-offs and the 4th switch element 27 conducting, these the second one-way conduction unit 26 conductings.
This first energy storage subelement 23 is for storage power, and coordinate this first one-way conduction unit 25 and this second one-way conduction unit 26 positive half periods at the first alternating voltage to convert this first alternating voltage to first direct voltage, at the negative half-cycle of this first alternating voltage, this first alternating voltage is converted to the second direct voltage.
These the first energy-storage units 50 one end connect this first voltage output end 70, and the other end connects this public output 14.These the second energy-storage units 60 one end connect this second voltage output 80, and the other end connects this public output 14.This first energy-storage units 50 and this second energy-storage units 60 receives these first direct voltages and this second direct voltage with storage power, and by the power conversion storing for driving the needed voltage of load via these first voltage output end, 70 outputs.
Understandably, this the second rectification branch road 30 is under the control of the 5th control signal ctr5, the 6th control signal ctr6, the 7th control signal ctr7 and the 8th control signal ctr8, positive half period at the second alternating voltage converts this second alternating voltage to the 3rd direct voltage, negative half-cycle at the second alternating voltage is converted to the 4th direct voltage by this second alternating voltage, and the first energy-storage units 50 and this second energy-storage units 60 reception the 3rd direct voltages and the 4th direct voltage are with storage power.The 3rd rectification branch road 40 is under the control of the 9th control signal ctr9, the tenth control signal ctr10, the 11 control signal ctr11 and the 12 control signal ctr12, positive half period at the 3rd alternating voltage is converted to the 5th direct voltage by the 3rd alternating voltage, negative half-cycle at the 3rd alternating voltage is converted to the 6th direct voltage by the 3rd alternating voltage, and this first energy-storage units 50 and this second energy-storage units 60 reception the 5th direct voltages and the 6th direct voltage are with storage power.
During work, the first rectification branch road 20 of take is told about the operation principle of this rectification circuit 1 as example.When this first alternating voltage is during in first positive half period, i.e. this first ac voltage output, 11 output positive voltages, these public output 14 output negative voltages.The one-period of control signal of take is example, this first control signal is ended after controlling the first conducting of this first switch element 21, now, this second control signal is controlled this second switch unit 22 and these the first switch element 21 conducting simultaneously or cut-offs, the 3rd control signal is controlled the 3rd switch element 24 in cut-off state, and the 4th control signal is controlled the 4th switch element 27 and first ended rear conducting.Here take the cycle that cycle of this first control signal is control signal.Particularly, when this first switch element 21 and this second switch unit 22 conductings and the 3rd switch element 24 and the 4th switch element 27 cut-off, this first ac voltage output 11, the positive conduction terminal 212 of this first switch, the negative conduction terminal 213 of this first switch, the negative conduction terminal 223 of this second switch, the positive conduction terminal 222 of this second switch and this first energy storage subelement 23 are connected serially to this public output 14 successively, form loop.This first energy storage subelement 23 is by the charging of the voltage of the first polarity storage power.When these the first switch element 21 cut-offs and 22 cut-offs of this second switch unit and the 3rd switch element 24 cut-offs and the 4th switch element 27 conducting, this first energy storage subelement 23, this second energy-storage units 60, the negative conduction terminal 273 of the 4th switch, the positive conduction terminal 272 of the 4th switch, the 3rd end 261 and the 4th end 262 form a loop.The energy that this first energy storage subelement 23 stores is to these the second energy-storage units 60 chargings.
When this first alternating voltage is during in first negative half-cycle, i.e. this first ac voltage output, 11 output negative voltages, these public output 14 output positive voltages.The one-period of control signal of take is example, in the one-period of this control signal, after this first switch element 21 and the 22 first conductings simultaneously of second switch unit, ends, and the 3rd switch element 24 first end conducting afterwards, and the 4th switch element 27 is in cut-off state.Particularly, when these the first switch element 21 conductings and this second switch unit 22 conductings and the 3rd switch element 24 cut-offs and the 4th switch element 27 cut-off, this first ac voltage output 11, the positive conduction terminal 212 of this first switch, the negative conduction terminal 213 of this first switch, the negative conduction terminal 223 of this second switch, the positive conduction terminal 222 of this second switch and this first energy storage subelement 23 are connected serially to this public output 14 successively, form loop.This first energy storage subelement 23 is by the charging of the voltage of the second polarity storage power.When these the first switch element 21 cut-offs and 22 cut-offs of this second switch unit and the 3rd switch element 24 conductings and the 4th switch element 27 cut-off, this first energy storage subelement 23, the negative conduction terminal 243 of the 3rd switch, the positive conduction terminal 242 of the 3rd switch, this first end 251, this second end 252 and this first energy-storage units 50 form loop.The energy that this first energy storage subelement 23 stores is to these the first energy-storage units 50 chargings.
Understandably, this the second rectification branch road 30 receives the second alternating voltage, within first cycle of the second alternating voltage, when this second alternating voltage is during in first positive half period, in the one-period of control signal, the first energy storage subelement 23 of this second rectification branch road 30 is first by the charging of the voltage of the first polarity storage power, and the energy that then the first energy storage subelement 23 of this second rectification branch road 30 stores is to these the second energy-storage units 60 chargings.When this second alternating voltage is during in first negative half-cycle, in the one-period of control signal, the first energy storage subelement 23 of this second rectification branch road 30 is first by the charging of the voltage of the second polarity storage power, and the energy that then the first energy storage subelement 23 of this second rectification branch road 30 stores is to these the first energy-storage units 50 chargings.
Understandably, the 3rd rectification branch road 40 receives the 3rd alternating voltage, within first cycle of the 3rd alternating voltage, when the 3rd alternating voltage is during in first positive half period, in the one-period of control signal, the first energy storage subelement 23 of the 3rd rectification branch road 40 is first by the charging of the voltage of the first polarity storage power, and the energy that then the first energy storage subelement 23 of the 3rd rectification branch road 40 stores is to these the second energy-storage units 60 chargings.When the 3rd alternating voltage is during in first negative half-cycle, in the one-period of control signal, the first energy storage subelement 23 of the 3rd rectification branch road 40 is first by the charging of the voltage of the second polarity storage power, and the energy that then the first energy storage subelement 23 of the 3rd rectification branch road 40 stores is to these the first energy-storage units 50 chargings.
So repeat the positive negative cycle of one or several alternating current, on this first energy-storage units 50 and this second energy-storage units 60, can store enough energy state that reaches capacity.Time when this first energy-storage units 50 and this second energy-storage units 60 reach capacity state is relevant with the magnitude of voltage of this first alternating voltage, this second alternating voltage, the 3rd alternating voltage and the capacity of this first energy-storage units 50 and this second energy-storage units 60.
When this first energy-storage units 50 and this second energy-storage units 60 saturated after, take this first rectification branch road 20 to tell about its operation principle as example.When this first alternating voltage is during in positive half period: in the one-period in control signal, when these the first switch element 21 conductings and this second switch unit 22 conductings and the 3rd switch element 24 cut-offs and the 4th switch element 27 cut-off, this the first energy storage subelement 23 is by the charging of the voltage of the first polarity storage power, and the energy of this first energy- storage units 50 and 60 storages of this second energy-storage units is to these first voltage output end, 70 power supplies.When these the first switch element 21 cut-offs and 22 cut-offs of this second switch unit and the 3rd switch element 24 cut-offs and the 4th switch element 27 conducting, 23 pairs of these the second energy-storage units 60 of this first energy storage subelement charge to form the first direct voltage, and the energy of this first energy- storage units 50 and 60 storages of this second energy-storage units is to these first voltage output end, 70 power supplies.
When this first alternating voltage is during in negative half-cycle: in the one-period in control signal, when these the first switch element 21 conductings and this second switch unit 22 conductings and the 3rd switch element 24 cut-offs and the 4th switch element 27 cut-off, this the first energy storage subelement 23 is by the charging of the voltage of the second polarity storage power, and this first energy- storage units 50 and 70 power supplies of 60 pairs of these the first voltage output ends of this second energy-storage units.When these the first switch element 21 cut-offs and 22 cut-offs of this second switch unit and the 3rd switch element 24 conductings and the 4th switch element 27 cut-off, 23 pairs of these the first energy-storage units 50 of this first energy storage subelement charge to form the second direct voltage, and the energy of this first energy- storage units 50 and 60 storages of this second energy-storage units is to these the first voltage output end 70 power supplies.
Understandably, when this first energy-storage units 50 and this second energy-storage units 60 saturated after, in the one-period of this second alternating voltage and the 3rd alternating voltage, the operation principle in the one-period of its operation principle and this first alternating voltage is identical.
Refer to Fig. 4, it is the waveform schematic diagram of the first alternating voltage in the present invention, the second alternating voltage and the 3rd alternating voltage.In Fig. 3, a, b, c represent respectively the voltage waveform of this first alternating voltage, this second alternating voltage and the 3rd alternating voltage.Phase difference due to 120 ° of mutuals between this first alternating voltage, this second alternating voltage and the 3rd alternating voltage.When the voltage waveform a of this first alternating voltage is standard sine wave, the waveform of this first alternating voltage this first alternating voltage, this second alternating voltage and the 3rd alternating voltage when the positive half period, by three intervals of decile, is turned left and is followed successively by by the right: T2 and the 3rd interval T3 between the first interval T1, Second Region.As seen from Figure 4, between the first interval, Second Region or in the 3rd interval, in each interval, all have two alternating voltage polarity of voltages identical, the polarity of another one alternating voltage with contrary.At this, take the first interval as example, this first alternating voltage is in positive half period, and this second alternating voltage is in negative half-cycle, and the 3rd alternating voltage is in positive half period.The first interval interior time point A point of take is example, in the one-period of control signal: first, the first energy storage subelement 23 of this first rectification branch road 20 and 60 chargings of 23 pairs of these the second energy-storage units of the first energy storage subelement of the 3rd rectification branch road 40,23 pairs of these the first energy-storage units of the first energy storage subelement, 50 chargings of this second rectification branch road 30; Then, in take between Second Region, time point B point is example, 23 pairs of these the second energy-storage units of the first energy storage subelement, 60 chargings of this first rectification branch road 20, the first energy storage subelement 23 of this second rectification branch road 30 and 50 chargings of 23 pairs of these the first energy-storage units of the first energy storage subelement of the 3rd rectification branch road 40.Substantially, time point A place, the magnitude of voltage magnitude of voltage of the magnitude of voltage of this first alternating current and the 3rd alternating current and that approximate this second alternating current, time point B place, the magnitude of voltage magnitude of voltage of the magnitude of voltage of this second alternating current and the 3rd alternating current and that approximate this first alternating current, therefore,, no matter be time point A place or B place, it is basic identical that this first energy-storage units 50 and this second energy-storage units 60 are recharged the energy of storage when charging.Therefore the voltage that, this first energy-storage units 50 and this second energy-storage units 60 export load to is more stable.
In the present embodiment, this first switch element 21, this second switch unit 22, the 3rd switch element 24 and the 4th switch element 27 are NMOS (Negative channel-Metal-Oxide-Semiconductor) field effect transistor.Wherein, this first, second, third, fourth conducting control end 211,221,241,271 is the grid of NMOS field effect transistor, the positive conduction terminal 212,222,242,272 of this first, second, third, fourth switch is the drain electrode of NMOS field effect transistor, and the negative conduction terminal 213,223,243,273 of this first, second, third, fourth switch is the source electrode of this NMOS field effect transistor.This first one-way conduction unit 25 and this second one-way conduction unit 26 are diode.Wherein, the positive pole that this first end 251 and the 3rd end 261 are diode, the negative pole that this second end 252 and the 4th end 262 are diode.This first energy-storage units 50 and this second energy-storage units 60 are electric capacity, and this first energy storage subelement 23 is inductance.
Compare with prior art, rectification circuit 1 of the present invention does not need through electric power repeatedly conversion three-phase alternating voltage can be converted to drive the required direct voltage of load, and therefore, conversion efficiency and the stability of this rectification circuit 1 are higher.In addition, this rectification circuit 1 does not need transformer to isolate, and therefore, this rectification circuit 1 cost is lower, and in addition, this rectification circuit 1 can be shared with load earth connection, and wiring is simple.
Although the present invention discloses as above with preferred implementation; so it is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when doing various variations; the variation that these are done according to spirit of the present invention, within all should being included in protection range of the presently claimed invention.
Claims (10)
1. a rectification circuit, is characterized in that, this rectification circuit comprises: the first voltage output end and second voltage output; Be connected between the first voltage output end and second voltage output for driving the first energy-storage units and second energy-storage units of load; For exporting first, second, third ac voltage output and the public output of out of phase alternating voltage, this public output connects the node between the first energy-storage units and the second energy-storage units; Be connected to the first rectification branch road, the second rectification branch road and the 3rd rectification branch road between ac voltage output and public output; And drive the signal generation unit of each rectification branch road, this signal generation unit control each rectification branch road at positive half period only to the second energy-storage units charging, at negative half-cycle only to the first energy-storage units charging.
2. rectification circuit as claimed in claim 1, it is characterized in that, this the first rectification branch road, this the second rectification branch road and the 3rd rectification branch road comprise respectively the first switch element, second switch unit, the first energy storage subelement, the 3rd switch element, the first one-way conduction unit, the second one-way conduction unit and the 4th switch element, this the first one-way conduction unit comprises first end and the second end, this the second one-way conduction unit comprises the 3rd end and the 4th end, this first switch element, this second switch unit and this first energy storage subelement are connected between ac voltage output and public output successively, this second switch unit and the node between this first energy storage subelement the 3rd switch element of connecting successively, the first end of this first one-way conduction unit and this second end are to this first voltage output end, also connect successively this second end of this second one-way conduction unit of this second switch unit and the node between this first energy storage subelement, first end and the 4th switch element are to this second voltage output ground connection.
3. rectification circuit as claimed in claim 2, it is characterized in that, this first switch element, second switch unit, the 3rd switch element and the 4th switch element comprise respectively control end, positive conducting control end and negative conducting control end, and this control end reception control signal is to control this positive conducting control end and this conducting of negative conducting control end or the cut-off of respective switch unit.
4. rectification circuit as claimed in claim 3, it is characterized in that, this first switch element, second switch unit, the 3rd switch element and the 4th switch element are all nmos fet, this control end is the grid of nmos fet, the drain electrode that this positive conducting control end is nmos fet, the source electrode that this negative conducting control end is nmos fet.
5. rectification circuit as claimed in claim 2, is characterized in that, this first energy-storage units and this second energy-storage units are electric capacity, and this first energy storage subelement is inductance.
6. rectification circuit as claimed in claim 2, is characterized in that, this first one-way conduction unit and this second one-way conduction unit are all diode, the positive pole that this first end and the 3rd end are diode, the negative pole that this second end and the 4th end are diode.
7. rectification circuit as claimed in claim 2, it is characterized in that, this signal generation unit produces the first control signal, the second control signal, the 3rd control signal, the 4th control signal, for exporting respectively this first switch element of this first rectification branch road to, this second switch unit, the 3rd switch element and the 4th switch element, this signal generation unit produces the 5th control signal, the 6th control signal, the 7th control signal and the 8th control signal, for exporting respectively this first switch element of this second rectification branch road to, this second switch unit, the 3rd switch element and the 4th switch element, this signal generation unit produces the 9th control signal, the tenth control signal, the 11 control signal and the 12 control signal, for controlling respectively the first switch element of the 3rd rectification branch road, second switch unit, the 3rd switch element and the 4th switch element, this first controls signal to the 12 control signal and is PMW control signal.
8. rectification circuit as claimed in claim 7, is characterized in that, the frequency of this first control signal is greater than the frequency of this first alternating voltage.
9. rectification circuit as claimed in claim 8, is characterized in that, the cycle of this first alternating voltage is the integral multiple in the cycle of the first control signal.
10. a rectification circuit, it is characterized in that, this rectification circuit comprises three-phase alternating-current supply, the first rectification branch road, the second rectification branch road, the 3rd rectification branch road, the first energy-storage units, the second energy-storage units, signal generation unit, the first voltage output end and second voltage output, this three-phase alternating-current supply is for generation of the first alternating voltage, the second alternating voltage and the 3rd alternating voltage, this the first rectification branch road, under the control of the control signal that this second rectification branch road and the 3rd rectification branch road produce at this signal generation unit respectively by this first alternating voltage, this second alternating voltage and the 3rd alternating voltage convert direct voltage to, each rectification branch road only charges to one of two energy-storage units at positive half period, at negative half-cycle, only another of two energy-storage units charged, this first voltage output end is connected this first energy-storage units and this second energy-storage units successively to second voltage output, to drive, be connected to first, load between second voltage output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210322912.1A CN103683987A (en) | 2012-09-04 | 2012-09-04 | Rectification circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210322912.1A CN103683987A (en) | 2012-09-04 | 2012-09-04 | Rectification circuit |
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| Publication Number | Publication Date |
|---|---|
| CN103683987A true CN103683987A (en) | 2014-03-26 |
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| CN201210322912.1A Pending CN103683987A (en) | 2012-09-04 | 2012-09-04 | Rectification circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021097763A1 (en) * | 2019-11-21 | 2021-05-27 | 华为技术有限公司 | Rectifier, inverter, and wireless charging device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021097763A1 (en) * | 2019-11-21 | 2021-05-27 | 华为技术有限公司 | Rectifier, inverter, and wireless charging device |
| CN113228488A (en) * | 2019-11-21 | 2021-08-06 | 华为技术有限公司 | Rectifier, inverter and wireless charging equipment |
| CN113228488B (en) * | 2019-11-21 | 2022-09-02 | 华为技术有限公司 | Rectifier, inverter and wireless charging equipment |
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Application publication date: 20140326 |