CN108599593B - Self-current-sharing modularized high-capacity high-boost rectifier - Google Patents
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- CN108599593B CN108599593B CN201810575174.9A CN201810575174A CN108599593B CN 108599593 B CN108599593 B CN 108599593B CN 201810575174 A CN201810575174 A CN 201810575174A CN 108599593 B CN108599593 B CN 108599593B
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- 239000003990 capacitor Substances 0.000 claims abstract description 109
- 238000000034 method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
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- 230000000694 effects Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/066—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode particular circuits having a special characteristic
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
Abstract
The invention provides a self-current-sharing modularized high-capacity high-boost rectifier. In the traditional high-capacity high-boost rectifying occasion, a plurality of rectifying modules are often required to run in parallel and a transformer is boosted, and the problems of uneven power distribution among the plurality of modules, poor system reliability and high cost exist. The converter comprises m (even number), the first module is composed of n-1 capacitors and diodes, and the other modules are composed of n capacitors and diodes.
Description
Technical Field
The invention relates to a high-capacity high-boost non-isolated current transformer, in particular to a self-current-equalizing modularized high-capacity high-boost rectifier.
Background
The traditional voltage doubling rectifying circuit can realize higher voltage output on one hand, but generally only has adjustable input and output gain, and the current stress of a device is high and is not adjustable, so that the device is difficult to select in a large-capacity application occasion, and on the other hand, a plurality of rectifying modules are often required to be operated in parallel to increase the capacity of the device, and the problems of uneven power distribution among the plurality of modules, poor system reliability, difficulty in current sharing and the like exist.
Disclosure of Invention
In order to solve the defects of the existing rectifier in the application occasions of high capacity and high voltage boosting, the invention provides the high-capacity non-isolated rectifier which can automatically equalize current, has high voltage gain and can be adjusted.
The invention adopts the following technical scheme:
a self-equalizing modular high-capacity high-step-up rectifier is composed of an AC input source, m modules (even number), output diodes D 0 Filter capacitor C 0 Load R L ；
Wherein the m modules comprise:
module one includes a diode D 1 2 、D 1 3 ···D 1n Capacitance C 1 2 、C 1 3 ···C 1n . Capacitor C 1 2 、C 1 3 ···C 1n Is connected to the other end of the power supply and is connected to the diode D 2 1 Anode of (C) and filter capacitor C 0 Load R L Is connected to the other end of diode D 1 2 Cathode and capacitor C of (2) 1 2 Is connected to one end of diode D 1 3 Cathode and capacitor C of (2) 1 3 Is connected to one end of a diode D 1n Cathode and capacitor C of (2) 1n Is connected to one end of the housing.
The second module comprises a diode D 2 1 、D 2 2 ···D 2n Capacitance C 2 1 、C 2 2 ···C 2n . Capacitor C 2 1 、C 2 2 ···C 2n Is connected with the other end of the power supply and then is connected with the other end of the power supply, and a diode D 2 1 Cathode and capacitor C of (2) 2 1 Is connected to one end of diode D 2 2 Cathode and capacitor C of (2) 2 2 Is connected to one end of a diode D 2n Cathode and capacitor C of (2) 2n Is connected to one end of the housing.
Module three comprises diode D 3 1 、D 3 2 ···D 3n Capacitance C 3 1 、C 3 2 ···C 3n . Capacitor C 3 1 、C 3 2 ···C 3n Is connected to the other end of the power supply, and then is connected to one end of the power supply, diode D 3 1 Cathode and capacitor C of (2) 3 1 Is connected to one end of diode D 32 Cathode and capacitor C of (2) 3 2 Is connected to one end of the sameDiode D 3n Cathode and capacitor C of (2) 3n Is connected to one end of the housing.
Similarly, the module m-1 includes a diode D m-1 1 、D m-1 2 ···D m-1n Capacitance C m-1 1 、C m-1 2 ···C m-1n . Capacitor C m-1 1 、C m-1 2 ···C m-1n Is connected to the other end of the power supply, and then is connected to one end of the power supply, diode D m-1 1 Cathode and capacitor C of (2) m-1 1 Is connected to one end of diode D m-1 2 Cathode and capacitor C of (2) m-1 2 Is connected to one end of a diode D m-1n Cathode and capacitor C of (2) m-1n Is connected to one end of the housing.
Module m comprises a diode D m 1 、D m 2 ···D m n Capacitance C m 1 、C m 2 ···C m n . Capacitor C m 1 、C m 2 ···C m n Is connected with the other end of the power supply and then is connected with the other end of the power supply, the diode D m 1 Cathode and capacitor C of (2) m 1 Is connected to one end of diode D m 2 Cathode and capacitor C of (2) m 2 Is connected to one end of a diode D m n Cathode and capacitor C of (2) m n Is connected to one end of the housing. Diode D m n Cathode and capacitor C of (2) m n And diode D 0 Is connected to the anode of the battery.
The connection relation between the modules is as follows:
capacitor C in the first module 1 2 A node between the other end of (a) and one end of the power supply and a diode D in the second module 2 1 The anode of the first module is connected to a diode D 1 2 Cathode and C 1 2 The node between one end is connected with the diode D in the second module 2 2 Diode D in the first module 1 3 Cathode and C 1 3 The node between one end is connected with the diode D in the second module 2 3 The anode of the first module, diode D, and so on 1n Cathode and capacitor C of (2) 1n The node between one end is connected with the diode D in the second module 2n Is a positive electrode of (a).
Diode D in the second module 2 1 Cathode and C 2 1 The node between one ends is connected with the diode D in the module III 3 1 Diode D in the second module 2 2 Cathode and C 2 2 The node between one ends is connected with the diode D in the module III 3 2 Anode, and so on, diode D in the second module 2n Cathode and C 2n The node between one ends is connected with the diode D in the module III 3n And an anode.
Similarly, diode D in the m-1 th module m-1 1 Cathode and capacitor C m-1 1 The node between one ends is connected with the diode D in the module m m 1 The anode of the (m-1) th diode D in the module m-1 2 Cathode and capacitor C m-1 2 The node between one ends is connected with the diode D in the module m m 2 Diode D in the m-1 th module, and so on m-1n Cathode and capacitor C of (2) m-1n The node between one ends is connected with the diode D in the module m m n Is a positive electrode of (a).
Diode D in mth module m 1 Cathode and capacitor C m 1 The node between one end is connected with diode D in module one 1 2 Diode D in the mth module m 2 Cathode and capacitor C m 2 The node between one end is connected with diode D in module one 1 3 The anode of (D) in the m-th module, and so on m n-1 Cathode and capacitor C m n-1 The node between one end is connected with diode D in module one 1n Is a positive electrode of (a).
Load R L And C 0 Parallel, load R L One end connected with diode D 0 The other end is connected to the capacitor C in the first module 1 2 A node between the other end and one end of the power supply. Diode D 0 Anode and diode D of (c) m n Cathode and capacitor C of (2) m n Is connected to the node between the ends of the pair. The even number of modules are connected with the other end of the power supply, and the odd number of modules are connected with one end of the power supply.
The invention relates to a self-current-sharing modularized high-capacity high-boost rectifier, which has the following technical effects:
1. the input and output gain is high and adjustable, and the voltage and current stress of the switching device is low and adjustable. Wherein:
the ratio of output voltage to input voltage is (no load):
the voltage stress of the diode is:
m is the number of input phases and n is the number of diodes and capacitors in the module.
2. Each module can realize automatic current sharing and power sharing of the transformer.
3. And a large-scale industrial frequency transformer is omitted, and the volume and cost of the system are reduced.
Drawings
Fig. 1 is a schematic general diagram of the circuit of the present invention.
Fig. 2 is a circuit topology diagram of the present invention with m=4 and n=2.
Fig. 3 is a waveform diagram of input/output voltage according to the present invention.
FIG. 4 shows a diode D according to the invention 21 、D 31 、D 41 、D 1 2 Is a voltage waveform diagram of (a).
FIG. 5 shows a diode D according to the invention 21 、D 31 、D 41 、D 1 2 Is a current waveform diagram of (a).
FIG. 6 shows a capacitor C according to the invention 21 ～C 42 Is a voltage waveform diagram of (a).
Fig. 7 is a simulated waveform diagram of four module currents of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in FIG. 2, a self-equalizing modular high-capacity high-boost rectifier comprises an AC input source, 4 modules, 8 capacitors C 0 、C 2 1 、C 3 1 、C 4 1 、C 1 2 、C 2 2 、C 3 2 、C 4 2 8 diodes D 0 、D 2 1 、D 3 1 、D 4 1 、D 1 2 、D 2 2 、D 3 2 、D 4 2 A load R L . Wherein:
among 4 modules:
module one includes a diode D 1 2 Capacitance C 1 2 . Capacitor C 1 2 Is connected with one end of the power supply and is simultaneously connected with a diode D 2 1 Anode of (C) and filter capacitor C 0 Load R L Is connected to the other end of diode D 1 2 Cathode and capacitor C of (2) 1 2 Is connected to one end of the housing.
The second module comprises a diode D 2 1 、D 2 2 Capacitance C 2 1 、C 2 2 . Capacitor C 2 1 、C 2 2 Is connected with the other end of the power supply and then is connected with the other end of the power supply, and a diode D 2 1 Cathode and capacitor C of (2) 2 1 Is connected to one end of diode D 2 2 Cathode and capacitor C of (2) 2 2 Is connected to one end of the housing.
Module three comprises diode D 3 1 、D 3 2 Capacitance C 3 1 、C 3 2 . Capacitor C 3 1 、C 3 2 Is connected to one end of the power supply and then connected to the other end of the power supply, diode D 3 1 Cathode and capacitor C of (2) 3 1 Is connected to one end of diode D 3 2 Cathode and capacitor C of (2) 3 2 Is connected to one end of the housing.
Module four includes a diode D 4 1 、D 4 2 Capacitance C 4 1 、C 4 2 . Capacitor C 4 1 、C 4 2 Is connected to the other end of the power supply, and then is connected to one end of the power supply, diode D 4 1 Cathode and capacitor C of (2) 4 1 Is connected to one end of diode D 4 2 Cathode and capacitor C of (2) 4 2 Is connected to one end of the housing. Diode D 4 2 Cathode and capacitor C of (2) 4 2 And diode D 0 Is connected to the anode of the battery.
The connection relation between the modules is as follows:
capacitor C in the first module 1 2 A node between the other end of (a) and one end of the power supply and a diode D in the second module 2 1 The anode of the first module is connected to a diode D 1 2 Cathode and C 1 2 The node between one end is connected with the diode D in the second module 2 2 Is provided with an anode of the formula (I),
diode D in the second module 2 1 Cathode and C 2 1 The node between one ends is connected with the diode D in the module III 3 1 Diode D in the second module 2 2 Cathode and C 2 2 The node between one ends is connected with the diode D in the module III 3 2 And an anode.
Diode D in the third Module 3 1 Cathode and capacitor C 3 1 The node between one end is connected with diode D in the fourth module 4 1 Anode of diode in third moduleD 3 2 Cathode and capacitor C 3 2 The node between one end is connected with diode D in the fourth module 4 2 Is a positive electrode of (a).
Diode D in fourth Module 4 1 Cathode and capacitor C 4 1 The node between one end is connected with diode D in module one 1 2 Is a positive electrode of (a).
Load R L And C 0 Parallel, load R L One end connected with diode D 0 The other end is connected to the capacitor C in the first module 1 2 A node between the other end and one end of the power supply. Diode D 0 Anode and diode D of (c) 4 2 Cathode and capacitor C of (2) 4 2 Is connected to the node between the ends of the pair. The first module and the third module are connected with one end of the power supply, and the second module and the fourth module are connected with one end of the power supply.
According to the different alternating current power supply current directions, the circuit can be divided into two working states:
(1) When the input alternating current is in the positive half-shaft. Input current through diode D 2 1 To capacitor C 2 1 Charging through diode D 2 2 To capacitor C 2 2 Charging, capacitor C 1 2 Discharging; while the input current passes through diode D 4 1 To capacitor C 4 1 Charging C 3 1 Discharging through diode D 4 2 To capacitor C 4 2 Charging, capacitor C 3 2 Discharging; diode D at this time 3 2 、D 1 2 、D 3 2 、D 0 Are all turned off.
(2) When the input alternating current is in the negative half shaft, the input current passes through the diode D 231 To capacitor C 3 1 Charging, capacitor C 2 1 Discharging through diode D 3 2 To capacitor C 3 2 Charging, capacitor C 2 2 Discharging; while the input current passes through diode D 1 2 To capacitor C 1 2 Charging, capacitor C 4 1 Discharging through diode D 0 To capacitor C 0 Charging, capacitor C 4 2 Discharging to the load R at the same time L Supplying power; diode D at this time 2 1 、D 4 1 、D 2 2 、D 4 2 Are all turned off.
Automatic current sharing principle analysis:
take four modules as an example in fig. 2. When the input alternating current is in the positive half shaft, all diodes are turned off, and the capacitor C 3 1 、C 1 2 、C 3 2 Discharging, capacitance C 2 1 、C 4 1 、C 2 2 、C 4 2 And (3) charging, wherein the falling speed of the Uin voltage is far greater than that of the capacitor voltage. The input voltage Uin rises from 0, when Uin rises above capacitance C 2 1 Voltage U C2 1 Diode D at the time of 2 1 Conduction and capacitance C 2 1 Starting charging and increasing the voltage; when Uin rises to (Uin+U) C1 2 ) Greater than U C2 2 Diode D at the time of 2 2 Conduction and capacitance C 2 2 Charging is started and the voltage rises. At the same time, uin rises to (Uin+U) C3 1 ) Greater than U C4 1 Time diode D 4 1 Conduction and capacitance C 4 1 Starting charging, increasing the voltage, and increasing Uin to (Uin+U) C3 2 ) Greater than U C4 2 Time diode D 4 2 Conduction and capacitance C 4 2 Charging is started and the voltage rises. Capacitor C 2 1 、C 4 1 、C 2 2 、C 4 2 Charging is continued until Uin rises to a maximum value Uin max Diode D at the next moment 2 1 、D 4 1 、D 2 2 、D 4 2 Reverse cut-off, capacitance C 2 1 、C 4 1 、C 2 2 、C 4 2 Capacitor C after charging 3 1 、C 1 2 、C 3 2 And (5) finishing the discharge. When the input alternating current is in the negative half shaft, the input alternating current is similar to the negative half shaft, and the description is omitted.
According to capacitance C o Ampere-second balance principle, output current I o Equal to diode D 0 The current I flowing through D0 Due to capacitance C 4 2 Is flowing through diode D 4 2 Current I at D4 2 Equal to I D0 And so on, on the first branch, flows through diode D 1 Current I at D2 1 Equal to the output current I o . Similarly, the current flowing through other branches is equal to the output current I o The invention realizes automatic current sharing. The process of analysis extends to n modules similarly.
Through the analysis, the transformer is omitted from the converter, automatic current sharing is realized, and the capacity of the converter is greatly increased through the modularized design.
Simulation parameters: switching frequency f=50 Hz, input voltage u in 30V, output voltage u o Near 240V, power p=115.2w. The current of the 4 modules is equal to each other in the graph, so that the automatic current sharing of each module is realized.
Claims (1)
1. The utility model provides a high-capacity high boost rectifier of self-current sharing modularization which characterized in that: the rectifier comprises an AC input source, m modules, m being even number, and an output diode D 0 Filter capacitor C 0 Load R L ；
Wherein the m modules comprise:
module one includes a diode D 12 、D 13 ···D 1n Capacitance C 12 、C 13 ···C 1n The method comprises the steps of carrying out a first treatment on the surface of the Capacitor C 12 、C 13 ···C 1n Is connected to the other end of the power supply and is connected to the diode D 21 Anode of (C) and filter capacitor C 0 Load R L Is connected to the other end of diode D 12 Cathode and capacitor C of (2) 12 One of (2)End-to-end diode D 13 Cathode and capacitor C of (2) 13 Is connected to one end of a diode D 1n Cathode and capacitor C of (2) 1n Is connected with one end of the connecting rod;
the second module comprises a diode D 21 、D 22 ···D 2n Capacitance C 21 、C 22 ···C 2n The method comprises the steps of carrying out a first treatment on the surface of the Capacitor C 21 、C 22 ···C 2n Is connected with the other end of the power supply and then is connected with the other end of the power supply, and a diode D 21 Cathode and capacitor C of (2) 21 Is connected to one end of diode D 22 Cathode and capacitor C of (2) 22 Is connected to one end of a diode D 2n Cathode and capacitor C of (2) 2n Is connected with one end of the connecting rod; module three comprises diode D 31 、D 32 ···D 3n Capacitance C 31 、C 32 ···C 3n The method comprises the steps of carrying out a first treatment on the surface of the Capacitor C 31 、C 32 ···C 3n Is connected to the other end of the power supply, and then is connected to one end of the power supply, diode D 31 Cathode and capacitor C of (2) 31 Is connected to one end of diode D 32 Cathode and capacitor C of (2) 32 Is connected to one end of a diode D 3n Cathode and capacitor C of (2) 3n Is connected with one end of the connecting rod;
...
similarly, the module m-1 includes a diode D m-11 、D m-12 ···D m-1n Capacitance C m-11 、C m-12 ···C m-1n The method comprises the steps of carrying out a first treatment on the surface of the Capacitor C m-11 、C m-12 ···C m-1n Is connected to the other end of the power supply, and then is connected to one end of the power supply, diode D m-11 Cathode and capacitor C of (2) m-11 Is connected to one end of diode D m-12 Cathode and capacitor C of (2) m-12 Is connected to one end of a diode D m-1n Cathode and capacitor C of (2) m-1n Is connected with one end of the connecting rod;
module m comprises a diode D m1 、D m2 ···D mn Capacitance C m1 、C m2 ···C mn The method comprises the steps of carrying out a first treatment on the surface of the Capacitor C m1 、C m2 ···C mn Is connected to the other end ofThen is connected with the other end of the power supply, diode D m1 Cathode and capacitor C of (2) m1 Is connected to one end of diode D m2 Cathode and capacitor C of (2) m2 Is connected to one end of a diode D mn Cathode and capacitor C of (2) mn Is connected with one end of the connecting rod; diode D mn Cathode and capacitor C of (2) mn And diode D 0 Is connected with the anode of the battery;
the connection relation between the modules is as follows:
capacitor C in the first module 12 A node between the other end of (a) and one end of the power supply and a diode D in the second module 21 The anode of the first module is connected to a diode D 12 Cathode and C 12 The node between one end is connected with the diode D in the second module 22 Diode D in the first module 13 Cathode and C 13 The node between one end is connected with the diode D in the second module 23 The anode of the first module, diode D, and so on 1n Cathode and capacitor C of (2) 1n The node between one end is connected with the diode D in the second module 2n An anode of (a);
diode D in the second module 21 Cathode and C 21 The node between one ends is connected with the diode D in the module III 31 Diode D in the second module 22 Cathode and C 22 The node between one ends is connected with the diode D in the module III 32 Anode, and so on, diode D in the second module 2n Cathode and C 2n The node between one ends is connected with the diode D in the module III 3n An anode;
similarly, diode D in the m-1 th module m-11 Cathode and capacitor C m-11 The node between one ends is connected with the diode D in the module m m1 The anode of the (m-1) th diode D in the module m-12 Cathode and capacitor C m-12 The node between one ends is connected with the diode D in the module m m2 Diode D in the m-1 th module, and so on m-1n Cathode and capacitor C of (2) m-1n The node between one ends is connected with the diode D in the module m mn An anode of (a);
diode D in mth module m1 Cathode and capacitor C m1 The node between one end is connected with diode D in module one 12 Diode D in the mth module m2 Cathode and capacitor C m2 The node between one end is connected with diode D in module one 13 The anode of (D) in the m-th module, and so on mn-1 Cathode and capacitor C mn-1 The node between one end is connected with diode D in module one 1n An anode of (a);
load R L And C 0 Parallel, load R L One end connected with diode D 0 The other end is connected to the capacitor C in the first module 12 A node between the other end and one end of the power supply; diode D 0 Anode and diode D of (c) mn Cathode and capacitor C of (2) mn Is connected with the node between one ends of the two; the even number of modules are connected with the other end of the power supply, and the odd number of modules are connected with one end of the power supply;
under no-load conditions, the ratio of the output voltage to the input voltage is:
the voltage stress of the diode is:
wherein: u (u) in For input voltage u o Is the output voltage; m 'is the number of input phases and n' is the number of diodes and capacitors in the module.
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| CN110518816B (en) * | 2019-08-14 | 2021-05-07 | 三峡大学 | Input port number adjustable modularization high-gain rectifier circuit |
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