CN108599592B - Modularized isolation type high-capacity high-gain rectifier - Google Patents

Modularized isolation type high-capacity high-gain rectifier Download PDF

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CN108599592B
CN108599592B CN201810574910.9A CN201810574910A CN108599592B CN 108599592 B CN108599592 B CN 108599592B CN 201810574910 A CN201810574910 A CN 201810574910A CN 108599592 B CN108599592 B CN 108599592B
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module
diode
transformer
capacitor
anode
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CN108599592A (en
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邾玢鑫
段宛宜
刘崧
佘小莉
黄悦华
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China Three Gorges University CTGU
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06Conversion 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
    • H02M7/068Conversion 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 mounted on a transformer

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

A modular isolated high capacity high gain rectifier, if said rectifier is configured to include an input voltage source,m(even number of modules is needed), an output filter capacitorC 0 An output diode D 0 Load and method for manufacturing the sameR L . In each module, the first module consists ofm-1 capacitor and diode, the other modules being allmAnd a capacitor and a diode. Compared with the traditional rectifying circuit, the input/output voltage gain is high and adjustable, the input current of each module can be automatically equalized, the problem of complex equalization during multi-module parallel operation is solved, the voltage stress and the current stress of the diode are also reduced, and the working efficiency of the rectifier is improved.

Description

Modularized isolation type high-capacity high-gain rectifier
Technical Field
The invention relates to a rectifier, in particular to a modularized isolation type high-capacity high-gain rectifier.
Background
The current voltage doubling rectifying circuit is applied to high-gain boosting rectifying occasions, such as X-ray machines and the like, but the input power is usually limited by the overcurrent capacity of a semiconductor diode, if a plurality of modules are adopted to run in parallel, the problem of unbalanced power distribution caused by different parasitic parameters among the modules is solved, the current stress of a device is not adjustable, and the design is difficult in high-capacity application occasions. If the gain of the rectifier is improved only by the high transformation ratio of the isolation type transformer, the high-capacity and high-turn ratio transformer is difficult to design and high in cost. The above problems limit the application of high-gain voltage-doubler rectifier circuits in high-power applications.
Disclosure of Invention
In order to solve the problem that a high-capacity voltage-multiplying rectifying circuit is difficult to construct in the prior art, the invention provides a modularized high-capacity high-gain isolated rectifier, the number of modules is flexibly adjusted according to different application occasions, and high-gain output, automatic current sharing and uniform power distribution are realized.
The technical scheme adopted by the invention is as follows:
a modularized isolation type high-capacity high-gain rectifier comprises an input power supply, m modules, an even number of m and an output diode D 0 Filter capacitor C 0 Load R L
The first module contains a transformation ratio of 1: n transformers, N-1 capacitors C 11 、C 12 ...C 1(n-1) N-1 diodes D 11 、D 12 ...D 1(n-1) The second module contains a transformation ratio of 1: n transformers, N capacitors C 21 、C 22 ...C 2n N diodes D 21 、D 22 ...D 2n And so on to the mth module, which comprises a transformation ratio of 1: n transformers, N capacitors C m1 、C m2 ...C mn N diodes D m1 、D m2 ...D mn . Transformer T 1 To T m The different name ends of the primary sides are respectively connected with each other, and the transformer T 1 To T m The different name ends of the secondary side are respectively connected, and the other end of the alternating current power supply is grounded;
the specific connection mode of the rectifier is as follows:
of the m modules, one of the m modules,
primary side end of first module, transformer T 1 Leading out the same name end of the primary side of the first module, the secondary side of the first module and the transformer T 1 Secondary side homonymous terminal capacitor C 1(n-1) One end of the capacitor C 1(n-1) One end and a transformer T 1 Node between the secondary side homonymous ends is led out, and a capacitor C 1(n-1) Is connected with the other end of the capacitor C 1(n-2) Capacitance C 1(n-1) And capacitor C 1(n-2) The node between them is connected with diode D 1(n-1) And lead out the cathode of D 1(n-1) Leading out an anode; connected in turn to the nth capacitor C 11 C is one end of (C) 11 And C 12 The node between them is connected with diode D 12 Cathode of D 12 Anode lead-out, capacitance C 11 Is connected with the other end of diode D 11 And lead out the cathode of D 11 Leading out an anode;
primary side end of second module, transformer T 2 Leading out the same name end of the primary side of the second module, the secondary side end of the second module and the transformer T 2 Secondary side homonymous terminal capacitor C 2n One end of the capacitor C 2n Is connected with the other end of the capacitor C 2(n-1) Capacitance C 2n And capacitor C 2(n-1) Is connected with diode D 2n And lead out the cathode of D 2n Leading out an anode; connected in turn to the nth capacitor C 21 C is one end of (C) 21 And C 22 The node between them is connected with diode D 22 Cathode of D 22 Anode lead-out, capacitance C 21 Is connected with the other end of diode D 21 And lead out the cathode of D 21 Leading out an anode;
primary side end of third module, transformer T 3 Leading out the same name end of the primary side of the third module, the secondary side of the third module and the transformer T 3 Secondary side homonymous terminal capacitor C 3n One end of the capacitor C 3n Is connected with the other end of the capacitor C 3(n-1) Capacitance C 3n And capacitor C 3(n-1) Is connected with diode D 3n And lead out the cathode of D 3n Leading out an anode; connected in turn to the nth capacitor C 31 C is one end of (C) 31 And C 32 The node between them is connected with diode D 32 Cathode of D 32 Anode lead-out, capacitance C 31 Is connected with the other end of diode D 31 And lead out the cathode of D 31 Leading out an anode;
and so on to the mth module,
primary side end of mth module, transformer T m Leading out the same name end of the primary side of the mth module, the secondary side of the mth module and the transformer T m Secondary side homonymous terminal capacitor C mn One end of the capacitor C mn Is connected with the other end of the capacitor C m(n-1) Capacitance C mn And capacitor C m(n-1) Is connected with diode D mn Cathode of D mn Leading out an anode; connected in turn to the nth capacitor C m1 C is one end of (C) m1 And C m2 The node between them is connected with diode D m2 Cathode of D m2 Anode lead-out, capacitance C m1 Is connected with the other end of diode D m1 And lead out the cathode of D m1 And leading out the anode.
The connection between each module is as follows:
module 1, transformer T 1 The primary side is connected with one end of an alternating current power supply in the same name, and a capacitor C 1(n-1) One end and a transformer T 1 The leading-out terminal of the node between the two is connected with a diode D 2n Anode of diode D 1(n-1) Cathode of (C) is connected with diode D 2(n-1) Anode of diode D 1(n-1) Anode of (D) is connected to diode D mn A cathode; and so on to diode D 11 Cathode of (C) is connected with diode D 21 Anode of diode D 11 Anode connected diode D m2 A cathode;
module 2, transformer T 2 Primary side homonymous grounding diode D 2n Cathode of (C) is connected with diode D 3n Anode of diode D 2(n-1) Cathode of (C) is connected with diode D 3(n-1) An anode of (a); and so on to diode D 21 Cathode of (C) is connected with diode D 31 An anode of (a);
module 3, transformer T 3 The primary side is connected with one end of an alternating current power supply in the same name and the diode D 3n Cathode of (C) is connected with diode D 4n Anode of diode D 3(n-1) Cathode of (C) is connected with diode D 4(n-1) An anode of (a); and so on to diode D 31 Cathode of (C) is connected with diode D 41 An anode of (a);
and so on to the mth module,
module m, transformer T m Primary side homonymous grounding diode D mn Cathode of (C) is connected with diode D 1(n-1) Anode of diode D m(n-1) Cathode of (C) is connected with diode D 1(n-2) An anode of (a); and so on to diode D m2 Cathode of (C) is connected with diode D 11 An anode of (a);
finally at capacitor C m1 Is connected with the other end of diode D 0 Anode of diode D 0 Cathode and capacitor C of (2) 0 And a load R L Is connected to one end of capacitor C 0 And a load R L And the other end of the transformer T 1 The secondary side is connected with the homonymous terminal.
The invention provides a modularized isolation type high-capacity high-gain rectifier, which has the following technical effects:
1. the invention realizes high gain output by using the modularized non-isolated rectifier, and adjusts the number of diodes and capacitors in each module according to the requirement to improve the gain. Meanwhile, the voltage stress of the diode is reduced, and the working efficiency of the converter is improved. Wherein:
the input-output gain is (without considering load effects):
the voltage stress of the diode is:
wherein m is the number of modules, N is the number of secondary side diodes and capacitors of the transformer in the modules, and N is the transformer transformation ratio.
2. The converter can realize automatic current sharing during multi-module parallel operation, and the power of the transformer is evenly distributed, so that the current sharing is ensured without a sensor and a control strategy.
3. The high gain is realized by adopting the modularized structure, the heavy alternating current transformer occupying the volume is saved, the system volume is reduced, the system cost is reduced, the application range is wide, and the overall working efficiency of the converter is improved.
Drawings
Fig. 1 is a schematic general diagram of the circuit of the present invention.
Fig. 2 is a circuit topology diagram of the circuit of the present invention with m=4 and n=2.
Fig. 3 is a flow equalization principle analysis diagram.
Fig. 4 is a waveform diagram of an input and output voltage simulation.
Fig. 5 is a simulated waveform diagram of the current average of four modules.
Fig. 6 is a waveform diagram of a capacitor voltage simulation.
Fig. 7 is a diode D 22 、D 32 、D 0 Voltage simulation waveform diagram.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in FIG. 2, a modular isolated high-capacity high-gain 4-module rectifier comprises an input power supply, 4 modules, and an output diode D 0 An output and filter capacitor C 0 Load R L The negative electrode of the alternating current power supply is grounded. The first module contains a transformation ratio of 1: n transformer, 1 capacitor C 11 1 diode D 11 The second module contains a transformation ratio of 1: n transformers, 2 capacitors C 21 、C 22 2 diodes D 21 、D 22 The third module contains a transformation ratio of 1: n transformers, 2 capacitors C 31 、C 32 2 diodes D 31 、D 32 The fourth module contains a transformation ratio of 1: n transformers, 2 capacitors C 41 、C 42 2 diodes D 41 、D 42 . Transformer T 1 To T 4 The different name ends of the primary sides are respectively connected with each other, and the transformer T 1 To T 4 The different name ends of the secondary side are also connected respectively, and the other end of the alternating current power supply is grounded. The specific connection mode of the rectifier is as follows:
of the 4 modules, one of them was used,
a first module, a primary side end and a transformer T 1 Primary side homonymous terminal of (a) is led out, secondary side terminal of (b) is led out, and transformer T 1 Secondary side homonymous terminal capacitor C 11 One end of the capacitor C 11 One end and a transformer T 1 Node between the secondary side homonymous ends is led out, and a capacitor C 11 Is connected with the other end of diode D 11 And lead out the cathode of D 11 Leading out an anode;
second module, primary side end, transformer T 2 Primary side homonymous terminal of (a) is led out, secondary side terminal of (b) is led out, and transformer T 2 Secondary side homonymous terminal capacitor C 22 One end of the capacitor C 22 Is connected with the other end of the capacitor C 21 Capacitance C 22 And capacitor C 21 Is connected with diode D 22 And lead out the cathode of D 22 Anode lead-out, capacitance C 21 Is connected with the other end of diode D 21 And lead out the cathode of D 21 Leading out an anode;
third module, primary side end, transformer T 3 Primary side homonymous terminal of (a) is led out, secondary side terminal of (b) is led out, and transformer T 3 Secondary side homonymous terminal capacitor C 32 One end of the capacitor C 32 Is connected with the other end of the capacitor C 31 Capacitance C 32 And capacitor C 31 Is connected with diode D 32 And lead out the cathode of D 32 Anode lead-out, capacitance C 31 Is connected with the other end of diode D 31 And lead out the cathode of D 31 Leading out an anode;
fourth module, primary side end, transformer T 4 Primary side homonymous terminal of (a) is led out, secondary side terminal of (b) is led out, and transformer T 4 Secondary side homonymous terminal capacitor C 42 One end of the capacitor C 42 Is connected with the other end of the capacitor C 41 Capacitance C 42 And capacitor C 41 Is connected with diode D 42 Cathode of D 42 Anode lead-out, capacitance C 41 Is connected with the other end of diode D 41 And lead out the cathode of D 41 And leading out the anode.
The connection between each module is as follows:
module 1, transformer T 1 The primary side homonymous terminal is led out to be connected with one end of an alternating current power supply, and a capacitor C 11 One end and a transformer T 1 The leading-out terminal of the node between the two is connected with a diode D 22 Anode of diode D 11 Cathode of (C) is connected with diode D 21 Anode of diode D 11 Anode connected diode D 42 A cathode;
module 2, transformer T 2 The leading-out end of the primary side homonymous terminal is grounded, and a diode D 22 Cathode of (C) is connected with diode D 32 Anode of diode D 21 Cathode of (C) is connected with diode D 31 An anode of (a);
module 3, transformer T 3 The primary side homonymous terminal is led out to be connected with one end of an alternating current power supply, and a diode D 32 Cathode of (C) is connected with diode D 42 Anode of diode D 31 Cathode of (C) is connected with diode D 41 An anode of (a);
module 4, transformer T 4 Primary side homonymyThe end lead-out end is grounded, diode D 42 Cathode of (C) is connected with diode D 11 Is a positive electrode of (a).
Finally at capacitor C 41 Is connected with the other end of diode D 0 Anode of diode D 0 Cathode and capacitor C of (2) 0 And a load R L Is connected to one end of capacitor C 0 And a load R L And the other end of the transformer T 1 The secondary side is connected with the homonymous terminal.
According to the different power switch states, the circuit can be divided into three working states:
(1) When the input alternating current is in the positive half shaft, the input power supply passes through the transformer T 1 Primary side homonymous terminal and transformer T 2 The primary side synonym earth forms a primary side loop, and the induction current passes through the first transformer T 1 The secondary side homonymous terminal passes through a diode D 22 Second transformer T 2 To capacitor C 22 Charged by capacitor C 11 And diode D 21 To capacitor C 21 Charging C 11 Discharging; the input power is passed through a transformer T 3 Primary side homonymous terminal and transformer T 4 The primary side synonym earth forms a primary side loop, and the induction current passes through a third transformer T 3 The secondary side homonymous terminal passes through a capacitor C 32 Diode D 42 Fourth transformer T 4 To capacitor C 42 Charging C 32 Discharging through capacitor C 31 And diode D 41 To capacitor C 41 Charging C 31 Discharging; diode D at this time o 、D 11 、D 31 、D 32 Are all turned off.
(2) When the input alternating current is in the negative half shaft, the input power supply passes through the transformer T 2 Primary side homonymous terminal and transformer T 3 The primary side synonym earth forms a primary side loop, and the induction current passes through the second transformer T 2 The secondary side homonymous terminal passes through a capacitor C 22 Diode D 32 Third transformer T 3 To capacitor C 32 Charge and supply capacitor C 22 Discharging through capacitor C 21 And diode D 31 To capacitor C 31 Charging and givingC 21 Discharging; the input power is passed through a transformer T 4 Primary side homonymous terminal and transformer T 1 The primary side synonym earth forms a primary side loop, and the induced current passes through a fourth transformer T 4 The secondary side homonymous terminal passes through a capacitor C 42 Diode D 11 First transformer T 1 To capacitor C 11 Charging C 42 Discharging through capacitor C 41 And diode D o Given C 41 Discharging to capacitor C o Charging while simultaneously charging the load R L Supplying power; diode D at this time 21 、D 41 、D 22 、D 42 Are all turned off.
Simulation parameters: the transformer transformation ratio is 1:1, input voltage u in For sine alternating current with power frequency amplitude of 30V, outputting direct current voltage u 0 120V. As can be seen from fig. 5, the currents flowing through the 4 transformers are equal, and automatic current sharing is realized.
Flow equalization principle:
taking a column of diode capacitors as an example in fig. 3, the transformer transformation ratio is taken to be 1:1. At steady state, from t 0 From moment on, input voltage u in The rise from 0 begins, at which time all diodes are turned off and the filter capacitance alone discharges to the load. t is t 1 At the moment, input voltage u in Rising to (u) C41 -u C31 ) Diode D at this time 41 Start to conduct, capacitor C 31 Through D 41 To capacitor C 41 Charging, at this stage, input voltage u in =u C41 -u C31 。t 2 At the moment, input voltage u in Rising to capacitance C 21 D at the voltage trough value of (2) 21 On, the power supply passes through the diode D 21 To capacitor C 21 Charging U C21 Start to rise at stage u C21 =u in . When reaching the time t=pi/2, the input voltage u in Rising to amplitude u inmax Thereupon, the voltage u is input in Beginning to descend, at this time u in <u C21 ,u in <(u C41 -u C31 ) All diodes are turned off, and the power supply stops to capacitor C 21 Charging, capacitor C 31 Stop-direction capacitorC 41 Charging, filter capacitor C 0 Discharge to the load is started.
At time t=pi, the input voltage U in Down to 0 and begin to increase in reverse. t is t 3 At time instant, input voltage U in Reversely increase to (u) C31 -u C21 ) Diode D at this time 31 Start to conduct, capacitor C 21 Through D 31 To capacitor C 31 Charging at a stage |u in |=u C31 -u C21 。t 4 At the moment, input voltage u in Reversely increase to capacitance C 41 Diode D at the voltage peak of (a) 0 Start to conduct, capacitor C 41 Through D 0 Toward filter capacitor C 0 Charging at a stage |u in |=u C0 -u C41 . When reaching the time t=3pi/2, the input voltage u in Inversely increasing to an amplitude-u inmax Thereupon, the voltage u is input in Start decreasing in reverse at |u in |<u C31 -u C21 ,|u in |<u C0 -u C41 All diodes are turned off, capacitor C 41 Stop direction filter capacitor C 0 Charging, capacitor C 21 Stop to capacitor C 31 Charging, filter capacitor C 0 Discharge to the load is started.
According to capacitance C 0 Is based on ampere-second balance principle, and outputs current I 0 Equal to diode D 0 The current I flowing through D0 Due to capacitance C 41 Is flowing through diode D 41 Current I at D41 Equal to I D0 And so on, on the first branch, flows through diode D 21 Current I at D21 Equal to the output current I 0 . Similarly, the current flowing through other branches is equal to the output current I 0 The invention realizes automatic current sharing. The method is expanded to the same principle of n modules and generates superposition, and finally automatic current sharing is realized.

Claims (1)

1. A modularized isolation type high-capacity high-gain rectifier is characterized in that: the rectifier comprises an input power source and is provided with a power supply,meach module is,mEven number, output diodeD 0 Filter capacitorC 0 Load(s)R L
The first module contains a transformation ratio of 1:Nis used for the transformer of the transformer,n-1 capacitorC 11C 12 ...C n1(-1) A kind of electronic device with high-pressure air-conditioning systemn-1 diode D 11 、D 12 ...D n1(-1) The second module contains a transformation ratio of 1:Nis used for the transformer of the transformer,nindividual capacitorsC 21C 22 ...C n2 A kind of electronic device with high-pressure air-conditioning systemnDiode D 21 、D 22 ...D n2 ,.mA module (a)mEach module contains a transformation ratio of 1:Nis used for the transformer of the transformer,nindividual capacitorsC m1C m2 ...C mn A kind of electronic device with high-pressure air-conditioning systemnDiode D m1 、D m2 ...D mn
The input power supply comprises one side and the other side, and the other side of the input power supply is grounded;
the specific connection mode of the rectifier is as follows:
in the first module: transformer T 1 The primary side same-name end of the transformer T is connected with one side of an input power supply 1 Primary side heteronym end connection of (1)mModule transformer T m Primary side synonym end of (2); transformer T 1 Secondary side homonymous terminal connection capacitorC n1(-1) One end, capacitanceC n1(-1) The other end is connected with a capacitorC n1(-2) One end, capacitanceC n1(-2) The other end is connected with a capacitorC n1(-3) One endC 12 The other end is connected with a capacitorC 11 One end;
diode D n1(-1) Anode is connected with the firstmCapacitance of moduleC m n(-1) One end of diode D n1(-1) Cathode connection capacitorC n1(-1) The other end; diode D n1(-2) Anode is connected with the firstmCapacitance of moduleC m n(-2) One end of diode D n1(-2) Cathode connection capacitorC n1(-2) The other end; .. analogize, diode D 11 Anode is connected with the firstmCapacitance of moduleC m1 One end of diode D 11 Cathode connection capacitorC 11 The other end;
in the second module: transformer T 2 Is grounded at the same name as the primary side of the transformer T 2 Primary side heteronym end connection of (1)mModule transformer T m Primary side synonym end of (2); transformer T 2 Secondary side homonymous terminal connection capacitorC n2 One end, capacitanceC n2 The other end is connected with a capacitorC n2(-1) One endC 22 The other end is connected with a capacitorC 21 One end;
in the third module: transformer T 3 The primary side same-name end of the transformer T is connected with one side of an input power supply 3 Primary side heteronym end connection of (1)mModule transformer T m Primary side synonym end of (2); transformer T 3 Secondary side homonymous terminal connection capacitorC n3 One end, capacitanceC n3 The other end is connected with a capacitorC n3(-1) One endC 32 The other end is connected with a capacitorC 31 One end;
.. analogize to;
first, themThe module comprises: transformer T m Is grounded at the same name as the primary side of the transformer T m Secondary side homonymous terminal connection capacitorC mn One end, capacitanceC mn The other end is connected with a capacitorC m n (-1) One endC m2 The other end is connected with a capacitorC m1 One end;
the connection between each module is as follows:
transformer T of first module 1 A secondary side heteronymous terminal,Transformer T of second module 2 Secondary side synonym, and the followingm-1Module transformer T m-1 The second side heteronymous terminals are all connected with the firstmModule transformer T m A secondary side heteronym terminal;
transformer T of first module 1 Diode D with secondary side homonymous terminal connected with second module n2 Anode, diode D of second module n2 Capacitors with cathodes respectively connected with the second moduleC n2 Diode D of the other end and the third module n3 An anode;
capacitance of the second moduleC n2 Diode D of the third module at the other end n3 Anode, diode D n3 Capacitors with cathodes respectively connected with the third moduleC n3 Diode D of the other end, fourth module n4 An anode;
...
First, them-1Capacitance of moduleC m n(-1) The other end is connected with the firstmDiode D of module mn Anode, diode D mn Cathode connection firstmCapacitance of moduleC mn The other end;
diode D of the first module n1(-1) Capacitors with cathodes respectively connected with the first moduleC 1 n(-1) Diode D of the other end, second module 2(n-1) An anode;
diode D of the second module n2(-1) Capacitors with cathodes respectively connected with the second moduleC 2 n(-1) Diode D of the other end and the third module 3(n-1) An anode;
...
First, them-1Diode D of module m n (-1) (-1) The cathodes are respectively connected with the firstm-1Capacitance of moduleC m n (-1) (-1) Another end, the firstmDiode D of module m(n-1) An anode;
first, themDiode D of module m(n-1) Cathode connection firstmCapacitance C of module m n (-1) The other end;
diode D of the first module n1(-2) Capacitors with cathodes respectively connected with the first moduleC 1 n(-2) Diode D of the other end, second module n2(-2) An anode;
diode D of the second module n2(-2) Capacitors with cathodes respectively connected with the second moduleC 2 n(-2) Diode D of the other end and the third module 3(n-2) An anode;
...
First, them-1Diode D of module m n (-1) (-2) The cathodes are respectively connected with the firstm-1Capacitance of moduleC m n (-1) (-2) Another end, the firstmDiode D of module m(n-2) An anode;
first, themDiode D of module m(n-2) Cathode connection firstmCapacitance C of module m n (-2) The other end;
...
Diode D of the first module 11 Capacitors with cathodes respectively connected with the first moduleC 11 Diode D of the other end, second module 21 An anode;
diode D of the second module 21 Capacitor C with cathodes respectively connected with second module 21 Diode D of the other end and the third module 31 An anode;
...
First, them-1Diode D of module m (-1) 1 The cathodes are respectively connected with the firstm-1Capacitance of moduleC m (-1) 1 Another end, the firstmDiode D of module m1 An anode;
first, themDiode D of module m1 Cathode connection firstmCapacitance C of module m 1 The other end;
mindividual modules and output diodes D 0 Filter capacitorC 0 Load(s)R L The connection relation of (2) is as follows:
first, themCapacitance C of module m 1 The other end is connected with an output diode D 0 Anode, output diode D 0 The cathodes are respectively connected with filter capacitorsC 0 One end, loadR L One end of the filter capacitorC 0 Another end, loadR L The other ends are connected with the transformers T of the first module 1 And the secondary side is the same-name end.
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