CN110518816A - A kind of adjustable modularization high-gain rectification circuit of input port number - Google Patents

Abstract

A modular high-gain rectification circuit with adjustable input ports, the rectifier includes an input power supply, m modules, where m is an even number; the first module consists of n capacitors C ₁₁ , C ₁₂ ... C _{1 n} and Formed by n diodes D ₁₁ , D ₁₂ ... D _{1 n} ; the second module consists of n capacitors C ₂₁ , C ₂₂ ... C _{2 n} and n diodes D ₂₁ , D ₂₂ ... D _{2 n} Constitute; ... and so on to the m-1th module, the m-1th module consists of n capacitors C _{( m -1)1} , C _{( m -1)2} ... C _{( m -1) n and n Diodes D ( m ‑1)1} , D _{( m ‑1)2} ... D _{( m ‑1) n} constitute; the mth module, the mth module consists of n capacitors C _{m 1} , C _{m 2} . .. C _mn and n diodes D _{m 1} , D _{m 2} . . . D _mn . The invention provides a modularized high-gain rectification circuit with adjustable input ports, which can flexibly adjust the number of modules according to different application occasions, and realize high-gain output, automatic current sharing of current, and uniform distribution of power.

Description

A Modular High-Gain Rectifier Circuit with Adjustable Input Ports

technical field

The invention relates to a non-isolated rectifier circuit, in particular to a modular high-gain rectifier circuit with adjustable input ports.

Background technique

Under the demands of chip high-voltage power supply, ultra-high-voltage positive ion acquisition and acceleration, high-gain rectifier circuits (Voltage Multiplier, VM) and their modeling and analysis methods have been extensively researched and developed since the 1930s. At present, the CW-VM circuit proposed by Cockcroft and Walton and the D-VM circuit proposed by Luscher and Dickson are mainly used at present. The structures are shown in Fig. 1 and Fig. 2 of the accompanying drawings respectively. Composed of a series of diodes and capacitors, it has the advantages of high efficiency, low cost and simple structure. However, its input power is limited by the overcurrent capability of semiconductor diodes, making it difficult to apply in high-power applications.

Contents of the invention

In order to solve the problem that it is difficult to construct a large-capacity voltage doubler rectifier circuit in the prior art, the present invention provides a modular high-gain rectifier circuit with adjustable input ports. According to different applications, the number of modules can be flexibly adjusted to achieve high gain. Output, automatic current sharing of current, and even distribution of power.

The technical scheme that the present invention takes is:

A modular high-gain rectifier circuit with adjustable input ports, the rectifier includes an input power supply, m modules, and m is an even number;

The first module is composed of n capacitors C ₁₁ , C ₁₂ ... C _1n and n diodes D ₁₁ , D ₁₂ ... D _1n ;

The second module is composed of n capacitors C ₂₁ , C ₂₂ ... C _2n and n diodes D ₂₁ , D ₂₂ ... D _2n ;

...

By analogy to the m-1th module, the m-1th module consists of n capacitors C _(m-1)1 , C _(m-1)2 ... C _(m-1)n and n diodes D _{( m-1)1} , D _(m-1)2 ... D _(m-1)n constitute;

The mth module, the mth module is composed of n capacitors C _m1 , C _m2 ... C _mn and n diodes D _m1 , D _m2 ... D _mn ;

In the first module, one end of the capacitor _C11 is connected to one end of the input power supply, the other end of the capacitor _C11 is respectively connected to the cathode of the diode _D11 and one end _of the capacitor C12, and the anode of the diode _D11 is connected to the other end of the input power supply;

_The other end of the capacitor C12 is respectively connected to the cathode _of the diode D12 and one end _of the capacitor _C13 , and the anode of the diode D12 is connected to the other end of the input power supply;

The other end of the capacitor _C13 is respectively connected to the cathode of the diode _D13 and one end of the capacitor _C14 , and the anode of the diode _D13 is connected to the other end of the input power supply;

...and so on:

The other end of the capacitor C _1(n-1) is respectively connected to the cathode of the diode D _1(n-1) and one end of the capacitor C _1n , and the anode of the diode D _1(n-1) is connected to the other end of the input power supply;

The other end of the capacitor C _1n is connected to the cathode of the diode D _1n , and the anode of the diode D _1n is connected to the other end of the input power supply;

In the second module,

One end of the capacitor C ₂₁ is connected to one end of the input power supply, the other end of the capacitor C ₂₁ is connected to the cathode of the diode D ₂₁ and one end of the capacitor C ₂₂ , and the anode of the diode D ₂₁ is connected to the other end of the input power supply;

The other end of the capacitor C ₂₂ is respectively connected to the cathode of the diode D ₂₂ and one end of the capacitor C ₂₃ , and the anode of the diode D ₂₂ is connected to the other end of the input power supply;

...and so on:

The other end of the capacitor C _2(n-1) is respectively connected to the cathode of the diode D _2(n-1) and one end of the capacitor C _2n , and the anode of the diode D _2(n-1) is connected to the other end of the input power supply;

The other end of the capacitor C _2n is connected to the cathode of the diode D _2n , and the anode of the diode D _2n is connected to the other end of the input power supply;

...

and so on,

In the m-1th module,

One end of the capacitor C (m-1) ₁ is connected to one end of the input power supply, and the other end of the capacitor C _(m-1)1 is respectively connected to the cathode of the diode D _(m-1)1 and one end of the capacitor C _(m-1)2 , and the diode D ₍ The anode of _m-1)1 is connected to the other end of the input power supply;

The other end of the capacitor C _(m-1)2 is respectively connected to the cathode of the diode D _(m-1)2 and one end of the capacitor C _(m-1)3 , and the anode of the diode D _(m-1)2 is connected to the other end of the input power supply;

...By analogy, the other end of the capacitor C _(m-1)(n-1) is respectively connected to the cathode of the diode D _(m-1)(n-1) , and one end of the capacitor C _(m-1)n , and the diode D ₍ The anode of _m-1)(n-1) is connected to the other end of the input power supply;

The other end of the capacitor C _(m-1)n is connected to the cathode of the diode D _{(m-1)n ,} and the anode of the diode D (m-1)n is connected to the other end of the input power supply;

In the mth module,

One end of the capacitor C _m1 is connected to one end of the input power supply, the other end of the capacitor C _m1 is respectively connected to the cathode of the diode D _m1 and one end of the capacitor C _m2 , and the anode of the diode D _m1 is connected to the other end of the input power supply;

The other end of the capacitor C _m2 is respectively connected to the cathode of the diode D _m2 and one end of the capacitor C _m3 , and the anode of the diode D _m2 is connected to the other end of the input power supply;

...By analogy, the other end of the capacitor C _m(n-1) is respectively connected to the cathode of the diode D _m(n-1) , one end of the capacitor C _mn , and the anode of the diode D _m(n-1) is connected to the other end of the input power supply;

The other end of the capacitor C _mn is connected to the cathode of the diode D _mn , and the anode of the diode D _mn is connected to the other end of the input power supply;

The connection between each module is as follows:

The cathode of diode D ₁₁ in the first module is connected to the anode of diode D ₂₁ in the second module, the cathode of diode D ₂₁ in the second module is connected to the anode of diode D ₃₁ in the third module, ... the diode D in the m-1th module The cathode of _(m-1)1 is connected to the anode of diode D _m1 in the mth module;

The cathode of diode D ₁₂ in the first module is connected to the anode of diode D ₂₂ in the second module, the cathode of diode D ₂₂ in the second module is connected to the anode of diode D ₃₂ in the third module, ... the diode D in the m-1th module _{(m-1) The cathode of 2} is connected to the anode of diode D _m2 in the mth module;

...and so on,

The cathode of diode D _1n in the first module is connected to the anode of diode D _2n in the second module, the cathode of diode D _2n in the second module is connected to the anode of diode D _3n in the third module, ... the diode D in the m-1th module The cathode of _(m-1)n is connected to the anode of diode D _mn in the mth module;

One end of the capacitor C _m1 is connected to one end of the load _RL , and the other end of the load _RL is connected to one end of the capacitor C _mn .

The present invention is a modularized high-gain rectifier circuit with adjustable input ports, and the technical effects are as follows:

1) The present invention utilizes a modular rectifier circuit with an adjustable number of input ports to realize high-gain output, and adjusts the number of diodes and capacitors in each module according to requirements to increase the gain. At the same time, the voltage stress of the diode is also reduced, which improves the working efficiency of the conversion circuit. in:

The input and output gain is (no load):

The voltage stress of the diode is:

Among them, m is the number of modules, and n is the number of diodes and capacitors on the secondary side of the transformer circuit in the module.

2) When the transformation circuit is operated in parallel with multiple modules, automatic current sharing can be realized, and the power of the transformer circuit can be shared equally, without the need for sensing circuits and control strategies to ensure current sharing.

3) Adopting a modular structure to achieve high gain, eliminating the need for a bulky and bulky AC transformer circuit, reducing the size of the system, reducing system costs, wide application range, and improving the overall efficiency of the conversion circuit.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

Fig. 1 is a CW-VM circuit structure diagram.

Fig. 2 is a diagram of D-VM circuit structure.

Fig. 3 is a general diagram of the circuit principle of the present invention.

Fig. 4 is a circuit topology diagram of the circuit of the present invention where m=4 and n=2.

Fig. 5(a) is a voltage waveform diagram of capacitors C ₁₁ , C ₂₁ , C ₃₁ , and C ₄₁ of a prototype with a load of 6400Ω.

Fig. 5(b) is a voltage waveform diagram of capacitors C ₁₂ , C ₂₂ , C ₃₂ , and C ₄₂ of the prototype with a load of 6400Ω.

Fig. 5(c) is a voltage ripple diagram of capacitors C ₁₁ , C ₂₁ , C ₃₁ , and C ₄₁ of the prototype with a load of 6400Ω.

Fig. 5(d) is a voltage ripple diagram of capacitors C ₁₂ , C ₂₂ , C ₃₂ , and C ₄₂ of the prototype with a load of 6400Ω.

Figure 5(e) is the input voltage u _in , output voltage u _o , ripple Δu _o , and output current i _o waveforms of the prototype with a load of 6400Ω.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 4, a modular high-gain 4-module rectifier circuit includes an input power supply, 4 modules, and a load R _L . The first module consists of 2 capacitors C ₁₁ , C ₁₂ and 2 diodes D ₁₁ , D ₁₂ , the second module consists of 2 capacitors C ₂₁ , C ₂₂ and 2 diodes D ₂₁ , D ₂₂ , and the third module consists of Two capacitors C ₃₁ , C ₃₂ and two diodes D ₃₁ , D ₃₂ are formed, and the fourth module is formed by two capacitors C ₄₁ , C ₄₂ and two diodes D ₄₁ , D ₄₂ . The specific connection method of the rectifier circuit is as follows:

Of the 4 modules,

In the first module, one end of capacitor C ₁₁ is drawn out, the other end of capacitor C ₁₁ is connected to one end of capacitor C ₁₂ , the node of capacitor C ₁₁ and capacitor C ₁₂ is connected to the cathode of diode D ₁₁ and drawn out, the anode of diode D ₁₁ is drawn out, and capacitor C ₁₂ The other end of the diode D ₁₂ is connected to the cathode and drawn out, and the anode of the diode D ₁₂ is drawn out;

In the second module, one end of the capacitor C ₂₁ is drawn out, the other end of the capacitor C ₂₁ is connected to one end of the capacitor C ₂₂ , the node of the capacitor C ₂₁ and the capacitor C ₂₂ is connected to the cathode of the diode D ₂₁ and drawn out, the anode of the diode D ₂₁ is drawn out, and the capacitor C ₂₂ The other end of the diode D ₂₂ is connected to the cathode and drawn out, and the anode of the diode D ₂₂ is drawn out;

The third module, one end of the capacitor C ₃₁ is drawn out, the other end of the capacitor C ₃₁ is connected to one end of the capacitor C ₃₂ , the node of the capacitor C ₃₁ and the capacitor C ₃₂ is connected to the cathode of the diode D ₃₁ and drawn out, the anode of the diode D ₃₁ is drawn out, and the capacitor C ₃₂ The other end of the diode D ₃₂ is connected to the cathode and drawn out, and the anode of the diode D ₃₂ is drawn out;

In the fourth module, one end of capacitor C ₄₁ is drawn out, the other end of capacitor C ₄₁ is connected to one end of capacitor C ₄₂ , the node of capacitor C ₄₁ and capacitor C ₄₂ is connected to the cathode of diode D ₄₁ , the anode of D ₄₁ is drawn out, and the other end of capacitor C ₄₂ Connect the cathode of diode D ₄₂ and lead out, and the anode of diode D ₄₂ leads out.

The connection relationship between each module:

In the first module, one end of the capacitor _C11 is connected to one end of the input power supply, the cathode of the diode _D11 is connected to the anode of the diode _D21 , the anode of the diode _D11 is connected to the other end of the input power supply, and the anode _of the diode _D12 is connected to the cathode of the diode D41;

In the second module, one end of the capacitor _C21 is connected to the other end of the input power supply, the cathode of the diode _D21 is connected to the anode of the diode _D31 , and the cathode of the diode _D22 is connected to the anode of the diode _D32 ;

In the third module, one end of the capacitor _C31 is connected to one end of the input power supply, the cathode of the diode _D31 is connected to the anode of the diode _D41 , and the cathode of the diode _D32 is connected to the anode of the diode _D42 ;

In the fourth module, one end of the capacitor C ₄₁ is connected to the other end of the input power supply, and the cathode of the diode D ₄₁ is connected to the anode of the diode D ₁₂ ;

Finally, one end of the capacitor _C41 is connected to one end of the load _RL , and the other end of the load _RL is connected to one end of the capacitor _C42 .

According to the different states of the power switch, the circuit can be divided into three working states:

(1) At the initial moment, when all the diodes are in the off state, the load is powered by the capacitor C ₄₁ and the capacitor C ₄₂ .

(2) When the input alternating current is on the positive half axis, the input power forms a loop through capacitor C ₁₁ , diode D ₂₁ , and capacitor C ₂₁ to charge capacitor C ₂₁ and discharge capacitor C ₁₁ through capacitor C ₁₂ and diode D ₂₂ Charge capacitor C ₂₂ and discharge C ₁₂ ; at the same time, the input power forms a loop through capacitor C ₃₁ , diode D ₄₁ , and capacitor C ₄₁ to charge capacitor C ₄₁ , discharge C ₃₁ , and transfer capacitor C ₃₂ and diode D ₄₂ to the capacitor C ₄₂ charges and discharges C ₃₂ ; diodes D ₁₁ , D ₁₂ , D ₃₁ , and D ₃₂ are all turned off.

(3) When the input alternating current is on the negative half axis, the input power forms a loop through capacitor C ₂₁ , diode D ₃₁ , and capacitor C ₃₁ to charge capacitor C ₃₁ and discharge capacitor C ₂₁ through capacitor C ₂₂ and diode D ₃₂ Charge the capacitor C ₃₂ and discharge C ₂₂ ; at the same time, the input power forms a loop through the capacitor C ₄₁ , diode D ₁₂ , and capacitor C ₁₂ to charge the capacitor C ₁₂ and discharge C ₄₁ through the diode D ₁₁ and the capacitor C ₁₁ and, Charge C ₁₁ ; diodes D ₂₁ , D ₂₂ , D ₄₁ , D ₄₂ are all off.

Current sharing principle:

In the steady state, according to the charge-discharge balance of capacitors C ₁₂ , C ₂₂ , C ₃₂ , and C ₄₂ in the VM unit, it can be seen that _ID42 is equal to the output current I ₀ , and due to the existence of capacitor C ₃₂ , flows through the diode D The current I _D32 on the diode _D12 is equal to I _D42 , and so on, the current I _D12 flowing through the diode D12 _on the first branch is equal to the output current I ₀ . Similarly, according to the charge-discharge balance of capacitors C ₁₁ , C ₂₁ , C ₃₁ , and C ₄₁ , the currents flowing through the diodes in other branches are also equal to the output current I ₀ . During the positive half cycle of the input voltage source, the average current of each input port (with the flow into the port as the positive direction) can be obtained from Equation (1). During the negative half cycle of the input voltage, the average current at the input port is given in Equation (2).

Similarly, in the positive half cycle of the input voltage, the average current of each capacitor in the half cycle can be obtained as in the formula (3) (with the capacitor discharge as the positive direction of the capacitor current). During the negative half cycle of the input voltage, the average current of each capacitor can be obtained by Equation (4).

Extending the above analysis to a topology with m input ports and n VM cells, the average current of each input port and capacitor during a half cycle is given in Equation (5)-Equation (8).

In the positive half cycle of the input voltage, the capacitor current and the average value of the input current:

i _cij ＝(-1) ⁱ⁺¹ ·(n+1-j)·I _o (6)

In the negative half cycle of the input voltage, the capacitor current and the average value of the input current:

i _cij ＝(-1) ⁱ ·(n+1-j)·I _o (8)

Among them, i∈[1,m], j∈[1,n].

Experimental parameters:

The peak value and frequency of the AC input voltage source are 100V/1kHz, the diode type is IDT12S60C, the number of input ports m=4, the number of VM units n=2, the capacitor in the VM unit is 10μF, the load filter capacitor is 50μF, and the load resistance is 6400Ω. The experimental waveforms are shown in Figures 5(a), 5(b), 5(c), 5(d), and 5(e), and the voltage waveforms across the capacitor in the VM unit are shown in Figures 5(a) and 5(b) As shown, their voltage effective values are: u _c11 =90.64V, u _c21 =171.7V, u _c31 =252.5V, u _c41 =341.5V, u _c12 =340.9V, u _c22 =332.4V, u _c32 =322.8 V, u _c42 = 319V. The voltage ripple of the capacitor is shown in Fig. 5(c) and 5(d), where Δu _vm =9.2V. The output voltage waveform is shown in Figure 5(e), u _o =658.6V.

Compared with the traditional rectifier circuit, the present invention is a modular high-gain rectifier circuit with adjustable input ports, which has high and adjustable input and output voltage gains, and the input current of each module can be automatically shared, which solves the problem of multiple modules running in parallel. The problem of current sharing is complicated, and the voltage stress of the diode is also reduced, which improves the working efficiency of the rectifier circuit.

Claims (1)

1. a kind of adjustable modularization high-gain rectification circuit of input port number, which is characterized in that the rectifier includes one defeated Enter power supply, m module, m are even number；

First module is by n capacitor C₁₁、C₁₂...C_1nAnd n diode D₁₁、D₁₂...D_1nIt constitutes；

Second module is by n capacitor C₂₁、C₂₂...C_2nAnd n diode D₂₁、D₂₂...D_2nIt constitutes；

……

And so on to m-1 module, m-1 module is by n capacitor C_(m-1)1、C_(m-1)2...C_(m-1)nAnd n diode D_(m-1)1、D_(m-1)2...D_(m-1)nIt constitutes；

M module, m-th of module is by n capacitor C_m1、C_m2...C_mnAnd n diode D_m1、D_m2...D_mnIt constitutes；

In first module, capacitor C₁₁One termination input power one end, capacitor C₁₁The other end is separately connected diode D₁₁Cathode, Capacitor C₁₂One end, diode D₁₁Anode connect the input power other end；

Capacitor C₁₂The other end is separately connected diode D₁₂Cathode, capacitor C₁₃One end, diode D₁₂Anode connect input power The other end；

Capacitor C₁₃The other end is separately connected diode D₁₃Cathode, capacitor C₁₄One end, diode D₁₃Anode connect input power The other end；

... and so on:

Capacitor C_1(n-1)The other end is separately connected diode D_1(n-1)Cathode, capacitor C_1nOne end, diode D_1(n-1)Anode connection The input power other end；

Capacitor C_1nThe other end connects diode D_1nCathode, diode D_1nAnode connects the input power other end；

In second module,

Capacitor C₂₁One termination input power one end, capacitor C₂₁The other end is separately connected diode D₂₁Cathode, capacitor C₂₂One end, Diode D₂₁Anode connect the input power other end；

Capacitor C₂₂The other end is separately connected diode D₂₂Cathode, capacitor C₂₃One end, diode D₂₂Anode connect input power The other end；

... and so on:

Capacitor C_2(n-1)The other end is separately connected diode D_2(n-1)Cathode, capacitor C_2nOne end, diode D_2(n-1)Anode connection The input power other end；

Capacitor C_2nThe other end connects diode D_2nCathode, diode D_2nAnode connects the input power other end；

……

And so on,

In m-1 module,

Capacitor C_(m-1)1One termination input power one end, capacitor C_(m-1)1The other end is separately connected diode D_(m-1)1Cathode, capacitor C_(m-1)2One end, diode D_(m-1)1Anode connect the input power other end；

Capacitor C_(m-1)2The other end is separately connected diode D_(m-1)2Cathode, capacitor C_(m-1)3One end, diode D_(m-1)2Anode Connect the input power other end；

... and so on, capacitor C_(m-1)(n-1)The other end is separately connected diode D_(m-1)(n-1)Cathode, capacitor C_(m-1)nOne end, Diode D_(m-1)(n-1)Anode connect the input power other end；

Capacitor C_(m-1)nThe other end connects diode D_(m-1)nCathode, diode D_(m-1)nAnode connects the input power other end；

In m module,

Capacitor C_m1One termination input power one end, capacitor C_m1The other end is separately connected diode D_m1Cathode, capacitor C_m2One end, Diode D_m1Anode connect the input power other end；

Capacitor C_m2The other end is separately connected diode D_m2Cathode, capacitor C_m3One end, diode D_m2Anode connect input power The other end；

... and so on, capacitor C_m(n-1)The other end is separately connected diode D_m(n-1)Cathode, capacitor C_mnOne end, diode D_m(n-1)Anode connect the input power other end；

Capacitor C_mnThe other end connects diode D_mnCathode, diode D_mnAnode connects the input power other end；

It is connected between modules as follows:

Diode D in first module₁₁Cathode connect the second module in diode D₂₁Anode, diode D in the second module₂₁ Cathode connection third module in diode D₃₁Anode ... ... m-1 module in diode D_(m-1)1Cathode connect m mould Diode D in block_m1Anode；

Diode D in first module₁₂Cathode connect the second module in diode D₂₂Anode, diode D in the second module₂₂ Cathode connection third module in diode D₃₂Anode ... ... m-1 module in diode D_(m-1)2Cathode connect m mould Diode D in block_m2Anode；

... and so on,

Diode D in first module_1nCathode connect the second module in diode D_2nAnode, diode D in the second module_2n Cathode connection third module in diode D_3nAnode ... ... m-1 module in diode D_(m-1)nCathode connect m mould Diode D in block_mnAnode；

Capacitor C_m1One end and load R_LOne end be connected, load R_LThe other end and capacitor C_mnOne end is connected.