CN204967776U - Pulse generator module based on RSD - Google Patents

Abstract

The utility model discloses a pulse generator module based on RSD, including main capacitance, magnetic switch, RSD, charging source, switch tube, preliminary filling electric capacity, preliminary filling inductance and control module, its characteristics lie in that main capacitance, magnetic switch, RSD, charging source, switch tube, preliminary filling electric capacity and the integration of preliminary filling inductance are on a PCB, and RSD adopts the ring to enclose the copper foil to fix on PCB, the utility model discloses a with RSD power switch and charging source, condenser and magnetic switch integration on PCB, make each component coordination work, reduce wire length to reduce the stray parameters such as stray inductance of power itself, improvement RSD's on state current climbing didt, in addition, adopting the ring to enclose copper foil welded fastening RSD, being favorable to RSD heat dissipation with higher speed on the one hand, on the other hand has increased the electric current passageway on the PCB, has the effect of average allocation electric current trend, has improved the flowing capability of pulse generator module.

Description

A kind of pulse power source module based on RSD

Technical field

The utility model belongs to high power high density pulse technique field, more specifically, relates to a kind of pulse power source module based on RSD.

Background technology

High power pulsed source (MW class power supply) high density energy of storage is compressed fast, changes or directly discharges to load, and at controlled thermonuclear fusion, high-pressure dust-cleaning, the fields such as treatment of Organic Wastewater are widely used; Impulse power electrical source technology of the prior art utilizes capacitance energy storage discharge mode, and great majority adopt mechanical spark gap or contactless ionic device if hydrogen thyratron is as discharge switch.In switch opening process, switch must bear larger on state current climbing di/dt.Under the promotion in national defence, economic dispatch field, the growth of the on state current climbing di/dt of switch is by the working limit of proximity switch, and the performance of switch greatly limit the progress in this field.

In recent years, the semiconductor switch such as reverse switch transistor (RSD), pulse thyristor, insulated gate bipolar transistor (IGBT) progresses into pulse power field; Arrester switch is withstand voltage height, greatly through-flow, but useful life is short; Insulated gate bipolar transistor can bear speed-sensitive switch, withstand voltage height, by force through-flow, be the important semiconductor device of field of power electronics, but price is relatively expensive; Thyristor can be high pressure resistant, resistance to big current, but switching speed is slower.

RSD is high power pulse device of new generation, job stability and triggering good dispersion, high pressure resistant big current, long service life; But in the prior art,, by wire or copper bar, discrete device is connected to form pulse system, form RSD switch, circuit stray parameter is comparatively large, and the on state current climbing di/dt of RSD is far below the limit (100kA/ μ s) of its on state current climbing di/dt tolerance.

Utility model content

For above defect or the Improvement requirement of prior art, the utility model provides a kind of pulse power source module based on RSD; Its object is to adopt Copper Foil collar to fix the packaged type of RSD, reduce the stray inductance of high power pulsed source, and then promote the on state current climbing di/dt of high power pulsed source main circuit.

For achieving the above object, according to an aspect of the present utility model, provide a kind of pulse power source module based on RSD, comprise main capacitance, magnetic switch, RSD, charge power supply, switching tube pre-charging capacitor, preliminary filling inductance and control module; Wherein main capacitance, magnetic switch, RSD and load form main circuit; Pre-charging capacitor, preliminary filling inductance, switching tube and RSD form precharging circuit; Its feature is, main capacitance, magnetic switch, RSD, charge power supply, switching tube, pre-charging capacitor and preliminary filling inductance are integrated on one piece of PCB, and RSD adopts collar Copper Foil to be fixed on PCB;

Wherein, the first end of magnetic switch connects the anode of main capacitance; The anode of RSD connects the second end of magnetic switch, is also connected with the output of charge power supply simultaneously; First output of the input link control module of charge power supply, main capacitance negative electrode passes through carrying ground; RSD minus earth; Second output of the gate pole link control module of switching tube, collector electrode is connected with the anode of RSD, the collector electrode of the anode connecting valve pipe of pre-charging capacitor, the minus earth of pre-charging capacitor; One end ground connection of preliminary filling inductance, the emitter of other end connecting valve pipe;

Wherein, main capacitance is as the main discharge electric capacity of pulse power source module, and the output current of this power supply is obtained by RSD electric discharge by main capacitance; Magnetic switch is used for when pre-charging capacitor is RSD preliminary filling, blocks main capacitance and discharges to RSD; Charge power supply is used for for main capacitance and pre-charging capacitor charging; After charge power supply is to main capacitance and pre-charging capacitor charging, before pulse power electric discharge, the collector electrode equipotential of the anode of main capacitance, the anode of RSD, switching tube; Switching tube is the switch of whole high power pulsed source; Pre-charging capacitor and preliminary filling inductance form antiresonant circuit, are RSD preliminary filling; Control module is for controlling the sequential of charge power supply and switching tube;

In PCB layout, PCB is provided with the opening for placing magnetic switch; Magnetic switch card is placed in this opening; The cathode weld of RSD is in the one side of PCB, and main capacitance is arranged on one end of this face PCB, and pre-charging capacitor is arranged on the other end of this face PCB; Collar Copper Foil has a top end face and at least two pins, and its top end face covers on RSD, is connected together with the anodic bonding of RSD; The pin of collar Copper Foil is welded on the PCB of this face; Collar Copper Foil plays and connects the anode of RSD and the effect in PCB front; Magnetic switch is communicated with by copper bar with between main capacitance and RSD: the anode of main capacitance is connected with copper bar one end by paving copper at the another side of PCB, and copper bar is through magnetic switch, and the copper bar other end is connected with the pin of collar Copper Foil by paving copper and via hole on the PCB of this face;

The collector electrode of anode by paving copper connecting valve pipe of pre-charging capacitor and the anode of RSD; On the PCB between the emitter and the negative electrode of RSD of switching tube, annular spreads copper, forms preliminary filling inductance, and the emitter of switching tube connects the negative electrode of RSD by this annular paving copper, the negative electrode of pre-charging capacitor is connected with RSD negative electrode by paving copper;

For meeting the requirement of logical big current on PCB, the basis of above-mentioned layout being done each network and covers Copper treatment, the security performance of PCB is provided.

Preferably, the top end face diameter of collar Copper Foil is greater than the diameter of RSD, for ensureing anode and the cathode insulation of guaranteeing RSD.

Preferably, the upper end of each pin of collar Copper Foil is vertical with the top end face of collar Copper Foil, and lower end abuts with PCB is vertical.

Preferably, described switch chip is silica-based RSD or silicon carbide-based RSD.

Preferably, RSD is pie, and thickness is 14mm ~ 27mm, and diameter is 41mm ~ 110mm; Collar Copper Foil adopts the copper of 0.3mm ~ 1mm thickness to become, and have top end face and 4 pins, its top end face diameter is 46mm ~ 120mm, the wide 15mm ~ 40mm of pin, high 14mm ~ 27mm.

In general, the above technical scheme conceived by the utility model compared with prior art, can obtain following beneficial effect:

1, the pulse power source module based on RSD that provides of the utility model, its output power of power supply can reach MW class (test voltage KV, electric current KA, power reaches MW), the devices such as RSD power switch and charge power supply, capacitor, magnetic switch are integrated on PCB, make each element co-ordination, reduce conductor length, thus reduce the stray parameters such as the stray inductance of this pulse power itself, improve the on state current climbing di/dt of RSD; Under the same terms, the integrated of this mode has higher on state current climbing di/dt than loop of the prior art;

2, the pulse power source module based on RSD that provides of the utility model, adopts the mode of Copper Foil collar to be welded and fixed RSD pioneeringly; Collar Copper Foil has the lid of two pins at least as having, cover on RSD, is communicated with anode and the PCB of RSD;

On the one hand, collar Copper Foil top end face is smooth, is conducive to pasting fin, and have the effect accelerating RSD heat radiation, its efficient heat dispersion achieves repetition rate first in impulse power electrical source module;

On the other hand, the pin of collar Copper Foil is connected with the paving copper on PCB, adds the current channel on PCB, has the effect of equal current distribution trend, achieves the object of logical big current on PCB, improves the through-current capability of the pulse power;

Another aspect, ensure that the mechanical performance of RSD, makes it fastening and is placed on PCB, avoid the risk that it comes off;

3, the pulse power source module based on RSD that provides of the utility model, by the integration packaging of PCB, achieves integrated, the modularization of pulse power device; Compared with prior art, greatly reduce the volume of the pulse power, improve the output current density of the pulse power, pushed pulse power device to facilitation and miniaturization.

Accompanying drawing explanation

Fig. 1 is the front view of the pulse power source module based on RSD that the utility model embodiment 1 provides;

Fig. 2 is the schematic three dimensional views of the pulse power source module based on RSD that the utility model embodiment 1 provides;

Fig. 3 is the encapsulating structure circuit theory diagrams of the pulse power source module based on RSD that the utility model embodiment 1 provides;

In all of the figs, identical Reference numeral is used for representing identical element or structure, wherein: 1-PCB, 2-main capacitance, and 3-magnetic switch, 4-collar Copper Foil, 5-switch chip, 6-charge power supply, 7-IGBT, 8-pre-charging capacitor.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each execution mode of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.

The pulse power source module based on RSD that embodiment 1 provides, its encapsulating structure is as shown in Figure 1; Comprise PCB1 and be integrated in the main capacitance 2 on PCB1, magnetic switch 3, collar Copper Foil 4, RSD5, charge power supply 6, switching tube 7, pre-charging capacitor 8 preliminary filling inductance and control module; In embodiment 1, switching tube adopts IGBT;

Fig. 2 is the schematic three dimensional views of the pulse power source module based on RSD that embodiment 1 provides, and as can be seen from Figure 2, main capacitance 2 is arranged on PCB1 one end; Magnetic switch 3 is communicated with by copper bar with RSD5 with main capacitance 2: the anode of main capacitance 2 is connected with copper bar one end by spreading copper at the back side of PCB1, copper bar is through magnetic switch 3, the copper bar other end is connected with 4 pins of the collar Copper Foil 4 being fixed on PCB1 front by paving copper and via hole at the PCB1 back side, and the negative electrode of main capacitance 2 is connected with the negative electrode of RSD5 by paving copper in the front of PCB1; The top end face of collar Copper Foil 4 covers on the anode of RSD5, and the anode of RSD5 is welded by Reflow Soldering with the top end face of collar Copper Foil 4; The negative electrode of RSD5 is welded on PCB1 front;

Pre-charging capacitor 8 is arranged on the other end of PCB1, and the anode of pre-charging capacitor 8 connects the collector electrode of IGBT7 by paving copper, and the negative electrode of pre-charging capacitor 8 is connected with the negative electrode of RSD5 by paving copper; The emitter of IGBT7 connects the negative electrode of RSD5 by paving copper; Preliminary filling inductance is obtained by annular paving copper on PCB1, is arranged between the emitter of IGBT7 and RSD5; Collar Copper Foil, as the lid with 4 pins, is communicated with anode and the PCB1 of RSD5;

Main capacitance 2 is the main discharge electric capacity of the pulse power, and output current is obtained by RSD5 electric discharge by this electric capacity; Magnetic switch 3 is enclosed within main circuit, for when pre-charging capacitor 8 is RSD5 preliminary filling, blocks main capacitance 2 pairs of RSD5 electric discharges; Collar Copper Foil 4 is used for connecting the anode of RSD5 and the front of PCB1, plays fixing RSD5 simultaneously; Charge power supply 6 is charged for main capacitance 2 and pre-charging capacitor 8 simultaneously; IGBT7 is the switch of whole pulse power source module; Pre-charging capacitor 8 and preliminary filling inductance form antiresonant circuit, are RSD5 preliminary filling;

After charge power supply 6 pairs of main capacitances 2 and pre-charging capacitor 8 charge, before pulse power source module electric discharge, the anode of main capacitance 2, the anode of RSD5, the collector electrode equipotential of IGBT7; Magnetic switch 3 is enclosed within the anode of main capacitance 2 and the connecting line of RSD5 anode; The negative electrode of RSD5 and the negative electrode of pre-charging capacitor 8 are connected to the ground, and the negative electrode of main capacitance 2 is connected to the ground by load, and the emitter of IGBT7 is connected to the ground by preliminary filling inductance;

During the work of this pulse power source module, control module opens charge power supply 6, and charge power supply 6 is simultaneously for main capacitance 2 and pre-charging capacitor 8 are charged; After charging complete, control module charge closing power supply 6, opens IGBT7, and the resonant circuit that pre-charging capacitor 8 and preliminary filling inductance form is reversed RSD5 provides preliminary filling electric current, due to magnetic switch unsaturation before blocking effect, during preliminary filling, main capacitance 2 cannot discharge to RSD5; After preliminary filling, magnetic switch 3 is saturated, and main capacitance 2 completes the electric discharge to RSD5.

In embodiment 1, for avoiding main circuit big current to the interference of control module, control module becomes plate separately, be made up of general purpose I GBT drive circuit and TMS320X28 series DSP, DSP exports the PWM ripple of two-way complementation, be sent to the drive circuit of preliminary filling power supply 6 and IGBT7 respectively, when preliminary filling power supply 6 receives high level signal, IGBT7 receives low level signal complementary with it; During charging, IGBT disconnects, complete IGBT conducting of charging, and pulse power source module is started working, and by the control charge power supply 6 of sequential and the break-make of IGBT7, realizes the repetition work of the pulse power;

In embodiment 1, RSD5 adopts solder reflow process with collar Copper Foil 4 and welding of PCB1, and scolding tin adopts leaded class solder, and material is soft, is conducive to reducing thermal stress; Wherein, RSD5 is pie, and thickness is 14mm, and diameter is 41mm; The thick 0.3mm of copper that collar Copper Foil 4 is used, for ensureing anode and the cathode insulation of RSD5, the top end face diameter of collar Copper Foil 4 is greater than the diameter of RSD5, and makes diameter minimum when ensureing safe insulation distance;

In embodiment 1, connect the safety standard IPC-9592 of association's formulation according to International Electro industry, under experimental grade voltage 1000V, the top end face diameter of collar Copper Foil 4 gets 46mm; According to IPC-D-275, under experiment current class pulsewidth 1 μ s, peak value 2.8KA, all wide 15mm of 4 pins of collar Copper Foil 4, high 14mm; For ensureing electric, Mechanical Reliability, the upper end of each pin of collar Copper Foil 4 is vertical with the top end face of collar Copper Foil 4, and its lower end abuts with PCB1 is vertical.

In embodiment 1, main capacitance 2 and pre-charging capacitor 8 capacitance are 1 μ F, and withstand voltage is 1200V, and the inductance value of preliminary filling inductance is 400nH; RSD is Si base RSD.

As shown in Figure 3, in main circuit, the anode of switch chip RSD connects one end of magnetic switch MS to the circuit theory diagrams of the high power pulsed source module that embodiment 1 provides, and the other end of magnetic switch MS connects main capacitance C ₁one end, electric capacity C ₁the other end and the negative electrode external load Z of RSD5; Precharging circuit adopts resonance preliminary filling mode; Power supply is main capacitance C under the control of control module ₁, pre-charging capacitor C ₂charging, after charging, power supply disconnects, and triggering and conducting IGBT, completes the discharge process of RSD.

For RSD device, there is following relation in its preliminary filling electric current and the di/dt flow through:

$Q_c={\∫}_0^{t_c}{I}_{c}dt\≥A\·di/dt$

Wherein, I _cfor preliminary filling electric current, Q _cfor pre-charge, t _cfor pre-charging time, A is the structural parameters of RSD device, is 0.5 × 10 ^-12~ 1.5 × 10 ^-12s ², di/dt is the current-rising-rate and the main circuit current climbing that flow through RSD.

For preliminary filling circuits for triggering, normally increase major loop di/dt by good preliminary filling; For the utility model, then increase major loop di/dt by the inductance of reduction major loop, can be known the stray inductance of wire in side circuit by finite element artificial inductive software, the inductance of wire determines primarily of its length and width, and the impact of thickness on it is little; In embodiment 1, PCB covers copper respectively to different networks, PCB surface of making rational planning for is amassed, and makes current channel wide and short, substantially reduces the stray inductance in major loop, plays the effect of the di/dt promoting major loop.

Magnetic switch is used for when preliminary filling circuits for triggering are to RSD preliminary filling electric current, blocks main circuit current, its Xining t _smeet following relation:

${\mathrm{\ΔBN}}_k{A}_k={\∫}_0^{t_s}{V}_{k}dt$

Wherein, Δ B is magnetic switch coil flux variable quantity, N _kfor coil turn, A _kfor magnetic core area, V _kfor magnetic switch voltage.

Critical pre-charge required when the parameter of the pulse power source module based on RSD that the utility model provides is opened according to RSD and the Xining of magnetic switch and magnetic switch volume are determined; It is below the parameter list of embodiment 2 and embodiment 3 li of RSD and collar Copper Foil;

Embodiment 2 ~ embodiment 3 parameter list

Embodiment 2, embodiment 3 and the difference of embodiment 1 are the tube core parameter of the RSD that pulse power source module adopts, the tube core of the RSD that embodiment 1 adopts is 1 inch, and the tube core of the RSD that embodiment 2 adopts is 2 inches, the tube core of the RSD that embodiment 3 adopts is 3 inches, the size of RSD tube core is larger, corresponding RSD packaging appearance is larger, and the withstand voltage relevant parameter that waits of RSD is higher, and output current and the repetition rate of pulse power source module are higher; Due to the change of the size of RSD, cover the parameter respective change thereupon of the collar Copper Foil of RSD.

Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.

Claims (5)

1., based on a pulse power source module of RSD, comprise main capacitance, magnetic switch, RSD, charge power supply, switching tube, pre-charging capacitor, preliminary filling inductance and control module; It is characterized in that, described main capacitance, magnetic switch, RSD, charge power supply, switching tube, pre-charging capacitor and preliminary filling inductance are integrated on one piece of PCB, and RSD adopts collar Copper Foil to be fixed on PCB;

The first end of described magnetic switch connects the anode of main capacitance; The anode of RSD connects the second end of magnetic switch, is also connected with the output of charge power supply simultaneously; First output of the input link control module of charge power supply; Main capacitance negative electrode passes through carrying ground; RSD minus earth; Second output of the gate pole link control module of described switching tube, collector electrode is connected with the anode of RSD, the collector electrode of the anode connecting valve pipe of pre-charging capacitor, the minus earth of pre-charging capacitor; One end ground connection of preliminary filling inductance, the emitter of other end connecting valve pipe;

PCB is provided with the opening for placing magnetic switch; Described magnetic switch card is placed in this opening; The cathode weld of RSD is in the one side of PCB; Described main capacitance is arranged on one end of this face PCB, and pre-charging capacitor is arranged on the other end of this face PCB; Described collar Copper Foil has a top end face and at least two pins, and described top end face covers on RSD, is connected together with the anodic bonding of RSD; The pin of collar Copper Foil is welded on the PCB of this face;

Described magnetic switch is communicated with by copper bar with between main capacitance and RSD: the anode of main capacitance is connected with copper bar one end by paving copper at the another side of PCB, and copper bar is through magnetic switch, and the copper bar other end is connected with the pin of collar Copper Foil by paving copper and via hole;

The collector electrode of anode by paving copper connecting valve pipe of pre-charging capacitor and the anode of RSD, the negative electrode of pre-charging capacitor is connected with RSD negative electrode by paving copper; Preliminary filling inductance spreads copper by annular on the PCB between switching tube emitter and the negative electrode of RSD and is formed.

2. pulse power source module as claimed in claim 1, it is characterized in that, the top end face diameter of described collar Copper Foil is greater than the diameter of RSD.

3. pulse power source module as claimed in claim 1, it is characterized in that, the upper end of each pin of described collar Copper Foil is vertical with the top end face of collar Copper Foil, and lower end abuts with PCB is vertical.

4. pulse power source module as claimed in claim 1, it is characterized in that, described RSD is silica-based RSD or silicon carbide-based RSD.

5. pulse power source module as claimed in claim 1, it is characterized in that, described RSD is pie, and thickness is 14mm ~ 27mm, and diameter is 41mm ~ 110mm; Described collar Copper Foil adopts the copper of 0.3mm ~ 1mm thickness to become, and have top end face and 4 pins, its top end face diameter is 46mm ~ 120mm, the wide 15mm ~ 40mm of pin, high 14mm ~ 27mm.