CN205004750U - Electron curtain is power supply unit with higher speed - Google Patents
Electron curtain is power supply unit with higher speed Download PDFInfo
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- CN205004750U CN205004750U CN201520682491.2U CN201520682491U CN205004750U CN 205004750 U CN205004750 U CN 205004750U CN 201520682491 U CN201520682491 U CN 201520682491U CN 205004750 U CN205004750 U CN 205004750U
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Abstract
The utility model relates to an electron curtain is power supply unit with higher speed, including the electric wire netting wave filter, phase voltage phase detector, the three -phase AC chopper, a low -pass filter, three -phase high voltage transformers, high pressure rectifying and wave -filtering unit, the choke circuit discharges, high pressure sampling circuit, electronic beam current sampling resistor, trouble discrimination circuit, a control unit, a comparator, the high pressure regulator, drive circuit and current transmitter, the electric wire netting wave filter, phase voltage phase detector, the three -phase AC chopper, a low -pass filter, three -phase high voltage transformers and high -pressure rectifying and wave -filtering unit are established ties, discharge choke circuit and electronic beam current sampling resistor and high -pressure rectifying and wave -filtering unit connection, trouble discrimination circuit and high -pressure sampling circuit, electronic beam current sampling resistor, a control unit, the high pressure regulator, drive circuit and current transmitter connect. The utility model discloses the governing speed is fast, conversion efficiency is high, the output the high pressrue ripple is little and the precision of voltage regulation is high, and is low to electric wire netting harm.
Description
Technical field
The utility model relates to electron curtain equipment technical field, is specifically related to a kind of electron curtain accelerating power source device.
Background technology
Accelerating power source is one of critical component of electron curtain (irradiation/accelerator) equipment, the design master of electron curtain accelerating power source, it is considered that improve power supply operational efficiency, reduces " public hazards " that produce electrical network when power supply runs and produces electric discharge phenomena to running and have rejection ability fast and effectively.
At present along with the development of semiconductor device, accelerating power source many employings pulse-width modulation voltage control mode.But most of AC/AC conversion is not the Direct Transform from AC to AC, usual needs DC link, based on the high pressure accelerating power source of AC/DC/AC translation circuit, system inner conversion link causes circuit complicated more, conversion efficiency is reduced, there is larger power dissipation.
Traditional accelerating power source based on AC/AC conversion is the input voltage utilizing thyristor phase shift AC voltage adjusting automatically to control main transformer, makes accelerating power source output voltage keep stable.Shortcoming is: 1, have pollution to electrical network, and power factor is not high and EMC index is difficult to up to standard; 2, the step-up transformer input voltage waveform of thyristor phase shift AC voltage adjusting accelerating power source is the non-sinusoidal waveform containing high order harmonic component; In order to ensure regulated quantity requirement, the Capacity design surplus of transformer is comparatively large, and utilance is low, and increase the loss of transformer, operational efficiency is low simultaneously; 3, thyristor phase shift AC voltage adjusting is powered, and the ripple that high direct voltage exports is larger, can be unfavorable to Electron Beam Focusing.
Utility model content
The high-power accelerating power source that technical problem to be solved in the utility model converts relative to traditional AC/AC, provides a kind of and has the electron curtain accelerating power source device that governing speed is fast, conversion efficiency is high, output high pressure ripple is little and the precision of voltage regulation is high.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of electron curtain accelerating power source device, comprises line filter, phase voltage phase detectors, three-phase alternating-current chopper, low pass filter, three-phase high-voltage transformer, high-voltage rectifying filter unit, electric discharge choke circuit, high-pressure sampling circuit, electronic beam current sample resistance, fault distinguishing circuit, control unit, comparator, high pressure regulator, drive circuit and current transducer;
The input of described line filter is connected with electrical network three phase mains, and its output is connected with the input of described phase voltage phase detectors and three-phase alternating-current chopper respectively; For cutting off electromagnetic interference (EMI) route of transmission;
The output of described phase voltage phase detectors is connected with described drive circuit input; For the phase place of each phase voltage of three-phase alternating current after detection filter, generate phase signal Us and send to drive circuit;
The output of described three-phase alternating-current chopper is connected with the input of described low pass filter; For carrying out pulse-width modulation (PWM) pressure regulation to filtered three-phase alternating current;
The output of described low pass filter is connected through the input of described current transducer with three-phase high-voltage transformer; For carrying out low-pass filtering to the three-phase alternating current after pulse-width modulation pressure regulation;
The output of described three-phase high-voltage transformer is connected with the input of described high-voltage rectifying filter unit; For boosting to the three-phase alternating current of low pass filter output;
The negative output terminal (high-pressure side) of described high-voltage rectifying filter unit is connected with the input of electric discharge choke circuit, and its positive output end (low-pressure end) is by electronic beam current sample resistance ground connection; For carrying out 12 pulsating wave rectification and filtering to two groups of three-phase high-voltage alternating currents after boosting;
Described electric discharge choke circuit output is connected to the negative electrode of electron gun, for suppressing the climbing speed of electrion electric current, reduces the electromagnetic impact intensity that electric discharge produces;
Described high-pressure sampling circuit is connected between electric discharge choke circuit output and the earth, for detecting output high-voltage value, the output of high-pressure sampling circuit is proportional to the voltage signal U of output high-voltage value as high-voltage feedback signal U, and high-voltage feedback signal U is sent to fault distinguishing circuit and comparator;
Described electronic beam current sample resistance is serially connected with between the low-pressure end of high-voltage rectifying filter unit and the earth, and for detected electrons line value, the output of its two ends is proportional to the voltage signal Ue of electronic beam current size as Beam Feedback signal Ue; And Beam Feedback signal Ue is sent to fault distinguishing circuit;
The output of described fault distinguishing circuit is connected with the input of described control unit, high pressure regulator and drive circuit respectively; For by the magnitude of voltage of the changing value dU/dt of the magnitude of voltage of high-voltage feedback signal U, high-voltage feedback signal U, Beam Feedback signal Ue and primary current signal U ~ magnitude of voltage in contrast with its setting threshold respectively, arbitrary numerical value exceedes its setting threshold, then generate fault-signal Uer and be sent to control unit, high pressure regulator and drive circuit;
The output of described control unit is connected with the input of comparator; For generating high pressure Setting signal U
*be sent to comparator; Also for according to fault-signal Uer by high pressure Setting signal U
*block zero setting;
The output of described comparator is connected with the input of described high pressure regulator; For by high pressure Setting signal U
*compare computing with high-voltage feedback signal U, export high voltage difference signal delta U (Δ U=U
*-U) be sent to high pressure regulator;
The output of described high pressure regulator is connected with the input of described drive circuit; For high voltage difference signal delta U is carried out proportional, integral computing, export control signal Uc to drive circuit; Also for receiving fault-signal Uer, block control signal Uc according to fault-signal Uer;
Described drive circuit is connected with described three-phase alternating-current chopper; The power switch pipe that drive singal drives three-phase alternating-current chopper is generated after phase signal Us, control signal Uc are carried out integrated treatment; Also for receiving fault-signal Uer, block the driving pulse of copped wave pipe according to fault-signal Uer;
The output of described current transducer is connected with the input of described fault distinguishing circuit; For the three-phase alternating current after low-pass filtering being converted to direct voltage U that linearly ratio exports ~ as primary current signal U ~ transfer to fault distinguishing circuit.
The beneficial effects of the utility model are: adopt the three-phase alternating-current chopper pressure regulation based on pulse-width modulation (PWM), carry out the size of regulation output voltage by changing duty ratio; High-tension transformer input voltage is sine voltage, and high-voltage rectifying adopts 12 pulsating wave rectification, high-tension transformer input current near sinusoidal ripple electric current; It is large that the high-power accelerating power source converted relative to traditional AC/AC has power factor, rapid dynamic response speed, pollutes little to electric network noise; High-voltage rectifying output harmonic wave content is low is easy to filtering.
On the basis of technique scheme, the utility model can also do following improvement.
Further, the elementary of described three-phase high-voltage transformer is Y connection, described three-phase high-voltage transformer have two groups secondary, wherein one group is secondary is Y connection, and another group is secondary is star-star-delta connection Y-Y-, and two groups of secondary line voltages are equal.
Further, described three-phase alternating-current chopper comprises copped wave pipe VT1, copped wave pipe VT3, copped wave pipe VT5, continued flow tube VT2, continued flow tube VT4, continued flow tube VT6, and described low pass filter comprises inductance L a, Lb and Lc and electric capacity Ca, Cb and Cc;
The described c pole of copped wave pipe VT1 exports with a phase of described line filter and is connected, the e pole of copped wave pipe VT1 is connected with one end of inductance L a and the c pole of continued flow tube VT4 respectively, and the other end of described inductance L a is connected with a phase input of current transducer with one end of electric capacity Ca respectively;
The described c pole of copped wave pipe VT3 exports with the b phase of described line filter and is connected, the e pole of copped wave pipe VT3 is connected with one end of inductance L b and the c pole of continued flow tube VT6 respectively, and the other end of described inductance L b is connected with the b phase input of current transducer with one end of electric capacity Cb respectively;
The described c pole of copped wave pipe VT5 exports with the c phase of described line filter and is connected, the e pole of copped wave pipe VT5 is connected with one end of inductance L c and the c pole of continued flow tube VT2 respectively, and the described inductance L c other end is connected with the c phase input of current transducer with one end of electric capacity Cc respectively;
The e pole of described continued flow tube VT2, continued flow tube VT4 and continued flow tube VT6 is connected together;
The other end of described electric capacity Ca, electric capacity Cb and electric capacity Cc is connected together.
Further, described high-voltage rectifying filter unit comprises the first high-voltage rectifier bridge ZL601, second high-voltage rectifier bridge ZL601, first high-voltage capacitance C601 and the second high-voltage capacitance C602, first high-voltage rectifier bridge ZL601 ac input end connects with the secondary winding of the Y connection of three-phase high-voltage transformer, first high-voltage capacitance C601 is attempted by the first high-voltage rectifier bridge ZL601 DC output end, second high-voltage rectifier bridge ZL602 ac input end connects with the secondary winding of the star-star-delta connection Y-Y-of three-phase high-voltage transformer, second high-voltage capacitance C602 is attempted by the second high-voltage rectifier bridge ZL602 DC output end, first high-voltage rectifier bridge ZL601 is at high-pressure side, second high-voltage rectifier bridge ZL602 is at low-pressure end, as total output of high-voltage rectifying filter unit after two rectifier bridge series connection.
Further, described electric discharge choke circuit is composed in parallel by chokes reactor L1 and high pressure two pole D1 pipe, the anode of high-voltage diode D1 is as the input of electric discharge choke circuit, the negative electrode of high-voltage diode D1 is as the output of electric discharge choke circuit, and the output of electric discharge choke circuit is connected to the negative electrode of electron gun; The effect of chokes reactor L1 is the electric discharge immediate current of restriction first high-voltage capacitance C601 and the second high-voltage capacitance C602; The effect of high-voltage diode D1 prevents discharging current from terminating in chokes reactor L1 two ends generation overvoltage.
Adopt the beneficial effect of above-mentioned further scheme to be: chokes reactor L1 can limit high-voltage capacitance electric discharge immediate current, high-voltage diode D1 can prevent discharging current from terminating in chokes reactor L1 two ends produce overvoltage.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of a kind of electron curtain accelerating power source of the utility model device;
Fig. 2 is the circuit theory diagrams of three-phase alternating-current chopper and low pass filter;
Fig. 3 is the circuit theory diagrams of high-voltage rectifying filter unit;
Fig. 4 is the drive pulse waveform figure of three-phase alternating-current chopper.
In accompanying drawing, the list of parts representated by each label is as follows:
1, line filter, 2, phase voltage phase detectors, 3, three-phase alternating-current chopper, 4, low pass filter, 5, three-phase high-voltage transformer, 6, high-voltage rectifying filter unit, 7, discharge choke circuit, and 8, high-pressure sampling circuit, 9, electronic beam current sample resistance, 10, fault distinguishing circuit, 11, control unit, 12, comparator, 13, high pressure regulator, 14, drive circuit, 15, current transducer.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
A kind of electron curtain accelerating power source device as shown in Figures 1 to 4, comprises line filter 1, phase voltage phase detectors 2, three-phase alternating-current chopper 3, low pass filter 4, three-phase high-voltage transformer 5, high-voltage rectifying filter unit 6, electric discharge choke circuit 7, high-pressure sampling circuit 8, electronic beam current sample resistance 9, fault distinguishing circuit 10, control unit 11, comparator 12, high pressure regulator 13, drive circuit 14 and current transducer 15;
The input of described line filter 1 is connected with electrical network three phase mains, and its output is connected with the input of described phase voltage phase detectors 2 and three-phase alternating-current chopper 3 respectively; For cutting off electromagnetic interference (EMI) route of transmission;
The output of described phase voltage phase detectors 2 is connected with described drive circuit 14 input; For the phase place of each phase voltage of three-phase alternating current after detection filter, generate phase signal Us and send to drive circuit 14;
The output of described three-phase alternating-current chopper 3 is connected with the input of described low pass filter 4; For carrying out pulse-width modulation (PWM) pressure regulation to filtered three-phase alternating current;
The output of described low pass filter 4 is connected with the input of three-phase high-voltage transformer 5 through described current transducer 15; For carrying out low-pass filtering to the three-phase alternating current after PWM pressure regulation;
The output of described three-phase high-voltage transformer 5 is connected with the input of described high-voltage rectifying filter unit 6; For boosting to the three-phase alternating current of low pass filter 4 output;
The negative output terminal (high-pressure side) of described high-voltage rectifying filter unit 6 is connected with the input of electric discharge choke circuit 7, and its positive output end (low-pressure end) is by electronic beam current sample resistance 9 ground connection; For carrying out 12 pulsating wave rectification and filtering to two groups of three-phase high-voltage alternating currents after boosting;
The output of described electric discharge choke circuit 7 is connected to the negative electrode of electron gun, for suppressing the climbing speed of electrion electric current, reduces the electromagnetic impact intensity that electric discharge produces;
Described high-pressure sampling circuit 8 is composed in series by high pressure drop piezoresistance R1 and high-voltage sampling resistance R2, is connected between electric discharge choke circuit 7 output and the earth; For detecting output high-voltage value, high-voltage sampling resistance R2 output is proportional to the voltage signal U of output high-voltage value as high-voltage feedback signal U, and high-voltage feedback signal U is sent to fault distinguishing circuit 10 and comparator 12;
Described electronic beam current sample resistance 9 is serially connected with between the low-pressure end of high-voltage rectifying filter unit 6 and the earth, and for detected electrons line value, the output of its two ends is proportional to the voltage signal Ue of electronic beam current size as Beam Feedback signal Ue; And Beam Feedback signal Ue is sent to fault distinguishing circuit 10;
The output of described fault distinguishing circuit 10 is connected with the input of described control unit 11, high pressure regulator 13 and drive circuit 14 respectively; For by the magnitude of voltage of the changing value dU/dt of the magnitude of voltage of high-voltage feedback signal U, high-voltage feedback signal U, Beam Feedback signal Ue and primary current signal U ~ magnitude of voltage in contrast with its setting threshold respectively, arbitrary numerical value exceedes its setting threshold, then generate fault-signal Uer and be sent to control unit 11, high pressure regulator 13 and drive circuit 14;
The output of described control unit 11 is connected with the input of comparator 12; For generating high pressure Setting signal U
*be sent to comparator 12; Also for according to fault-signal Uer by high pressure Setting signal U
*block zero setting;
The output of described comparator 12 is connected with the input of described high pressure regulator 13; For by high pressure Setting signal U
*compare computing with high-voltage feedback signal U, export high voltage difference signal delta U (Δ U=U
*-U) be sent to high pressure regulator 13;
The output of described high pressure regulator 13 is connected with the input of described drive circuit 14; For high voltage difference signal delta U is carried out proportional, integral computing, export control signal Uc to drive circuit 14; Also for receiving fault-signal Uer, blocking control signal Uc according to fault-signal Uer and exporting;
Described drive circuit 14 is connected with described three-phase alternating-current chopper 3; Each switching power tube (VT1-VT6) in drive singal driving three-phase alternating-current chopper 3 is generated after phase signal Us, control signal Uc are carried out integrated treatment; Also for receiving fault-signal Uer, block the driving pulse of copped wave pipe (VT1, VT3 and VT5) according to fault-signal Uer;
The output of described current transducer 15 is connected with the input of described fault distinguishing circuit 10; For the three-phase alternating current after low-pass filtering being converted to linearly ratio output dc voltage U ~ as primary current signal U ~ transfer to fault distinguishing circuit 10.
Preferably, the elementary of described three-phase high-voltage transformer 5 is Y connection, described three-phase high-voltage transformer 5 have two groups secondary, wherein one group is secondary is delta connection, and another group is secondary is Y connection, and the line voltage of two groups of secondary winding is equal.
Preferably, as shown in Figure 2, comprise copped wave pipe VT1, copped wave pipe VT3, copped wave pipe VT5, continued flow tube VT2, continued flow tube VT4, continued flow tube VT6, described low pass filter 4 comprises inductance L a, Lb and Lc and electric capacity Ca, Cb and Cc to described three-phase alternating-current chopper 3;
The c pole of described copped wave pipe VT1 exports with a phase of described line filter 1 and is connected, the e pole of copped wave pipe VT1 is connected with one end of inductance L a and the c pole of continued flow tube VT4 respectively, and the other end of described inductance L a is connected with a phase input of current transducer 15 with one end of electric capacity Ca respectively;
The c pole of described copped wave pipe VT3 exports with the b phase of described line filter 1 and is connected, the e pole of copped wave pipe VT3 is connected with one end of inductance L b and the c pole of continued flow tube VT6 respectively, and the other end of described inductance L b is connected with the b phase input of current transducer 15 with one end of electric capacity Cb respectively;
The c pole of described copped wave pipe VT5 exports with the c phase of described line filter 1 and is connected, the e pole of copped wave pipe VT5 is connected with one end of inductance L c and the c pole of continued flow tube VT2 respectively, and the described inductance L c other end is connected with the c phase input of current transducer 15 with one end of electric capacity Cc respectively;
The e pole of described continued flow tube VT2, continued flow tube VT4 and continued flow tube VT6 is connected together;
The other end of described electric capacity Ca, electric capacity Cb and electric capacity Cc is connected together.
Preferably, described high-voltage rectifying filter unit 6 as shown in Figure 3, comprise the first high-voltage rectifier bridge ZL601, second high-voltage rectifier bridge ZL601, first high-voltage capacitance C601 and the second high-voltage capacitance C602, first high-voltage rectifier bridge ZL601 ac input end connects with the secondary winding of the Y connection of three-phase high-voltage transformer 5, first high-voltage capacitance C601 is attempted by the first high-voltage rectifier bridge ZL601 DC output end, second high-voltage rectifier bridge ZL602 ac input end connects with the secondary winding of the star-star-delta connection Y-Y-of three-phase high-voltage transformer 5, second high-voltage capacitance C602 is attempted by the second high-voltage rectifier bridge ZL602 DC output end, first high-voltage rectifier bridge ZL601 is at high-pressure side, second high-voltage rectifier bridge ZL602 is at low-pressure end, as total output of high-voltage rectifying filter unit 6 after two rectifier bridge series connection.
Preferably, described electric discharge choke circuit 7 is composed in parallel by chokes reactor L1 and high pressure two pole D1 pipe, the anode of high-voltage diode D1 is as the input of electric discharge choke circuit 7, the negative electrode of high-voltage diode D1 is as the output of electric discharge choke circuit 7, and the output of electric discharge choke circuit 7 is connected to the negative electrode of electron gun; The effect of chokes reactor L1 is the electric discharge immediate current of restriction first high-voltage capacitance C601 and the second high-voltage capacitance C602; The effect of high-voltage diode D1 prevents discharging current from terminating in chokes reactor L1 two ends generation overvoltage;
The operation principles of this device: described line filter 1 accesses electrical network three phase mains; And cut-out electromagnetic interference EMI route of transmission is carried out to the three-phase electricity of access; Described three-phase alternating-current chopper 3 carries out pulse-width modulation pressure regulation to filtered three-phase alternating current; Three-phase alternating current after the 4 pairs of pulse-width modulation pressure regulation of described low pass filter carries out low-pass filtering; The three-phase alternating current of described three-phase high-voltage transformer 5 pairs of low pass filter outputs boosts; Described high-voltage rectifying filter unit 6 carries out rectifying and wave-filtering to the three-phase alternating current after boosting; Described electric discharge choke circuit 7 suppresses the climbing speed of electrion electric current, reduces the electromagnetic impact intensity that electric discharge produces, to the negative electrode stable output high-tension electricity of electron gun, realize conversion efficiency high, export that high pressure ripple is little and the precision of voltage regulation is high.
Three-phase alternating current after low-pass filtering is converted to linearly ratio output dc voltage U ~ transfer to fault distinguishing circuit 10 by described current transducer; Described high-pressure sampling circuit 8 detects high-voltage value, generates high-voltage feedback signal U, is sent to fault distinguishing circuit 10; Described electronic beam current sample resistance 9 detected electrons line value, its two ends export the voltage signal Ue being proportional to electronic beam current size, and Beam Feedback signal Ue is sent to fault distinguishing circuit 10;
Described fault distinguishing circuit 10 by the changing value dU/dt of the magnitude of voltage of high-voltage feedback signal U, high-voltage feedback signal U, the magnitude of voltage of voltage signal Ue and primary current signal U ~ magnitude of voltage in contrast with its setting threshold, arbitrary numerical value exceedes its setting threshold, then generate fault-signal Uer and be sent to control unit 11, high pressure regulator 13 and drive circuit 14;
Described control unit 11 according to fault-signal Uer by high pressure Setting signal U
*block zero setting; Described high pressure regulator 13 receives fault-signal Uer, blocks the output of control signal Uc according to fault-signal Uer; Described drive circuit 14 receives fault-signal Uer, the driving pulse of copped wave pipe (VT1, VT3 and VT5) is blocked according to fault-signal Uer, by coordinating of fault distinguishing circuit 10 and control unit 11 and other devices, effectively can identify fault, and fault is processed in time.
Described high-pressure sampling circuit 8 detects and exports high-voltage value, and generate high-voltage feedback signal U, be sent to comparator 12, described control unit 11 generates high pressure Setting signal U
*be sent to comparator 12; Described comparator 12 is by high pressure Setting signal U
*compare computing with high-voltage feedback signal U, export high voltage difference signal △ U=U
*-U is sent to high pressure regulator 13;
High voltage difference signal △ U is carried out proportional, integral computing by described high pressure regulator 13, exports control signal Uc to drive circuit 14; The phase place of each phase voltage of three-phase alternating current after described phase voltage phase detectors 2 detection filter, generates phase signal Us and sends to drive circuit 14;
The drive singal that described drive circuit 14 generates after phase signal Us, control signal Uc are carried out integrated treatment as shown in Figure 4 drives three-phase alternating-current chopper 3 breaker in middle power tube (VT1-VT6), three-phase alternating-current chopper 3 adopts the PWM control having input voltage phase and select, namely the on-off mode being connected on a pair power switch pipe (a copped wave pipe and a continued flow tube) on each phase power supply is determined by the phase place of three-phase input power phase voltage, when certain phase input phase voltage to be in three-phase during minimum voltage phase place (1/3 electric network source cycle), the phase signal Us of this phase is effective, the drive singal being connected to a pair power switch pipe in this phase keeps conducting driving condition always, be connected on two pairs of driving signal of power switching tube on other two-phase power supply and then work in pulse-width modulation driving condition, within complete pulse-width modulation status switch cycle, two the copped wave pipes and two continued flow tubes that are in pulse-width modulation driving condition drive respectively simultaneously, and every phase copped wave pipe and continued flow tube are push-pull drive mode, and recommend the fixing Dead Time of transfer process embedding, the driving pulse width of copped wave pipe is regulated by the output control signal Uc of high pressure regulator 13,
The output of described three-phase alternating-current chopper 3 is connected with the input of described low pass filter 4; For carrying out pulse-width modulation pressure regulation to filtered three-phase alternating current.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. an electron curtain accelerating power source device, it is characterized in that: comprise line filter (1), phase voltage phase detectors (2), three-phase alternating-current chopper (3), low pass filter (4), three-phase high-voltage transformer (5), high-voltage rectifying filter unit (6), electric discharge choke circuit (7), high-pressure sampling circuit (8), electronic beam current sample resistance (9), fault distinguishing circuit (10), control unit (11), comparator (12), high pressure regulator (13), drive circuit (14) and current transducer (15),
The input of described line filter (1) is connected with electrical network three phase mains, and its output is connected with the input of described phase voltage phase detectors (2) and three-phase alternating-current chopper (3) respectively; For cutting off electromagnetic interference route of transmission;
The output of described phase voltage phase detectors (2) is connected with described drive circuit (14) input; For the phase place of each phase voltage of three-phase alternating current after detection filter, generate phase signal Us and send to drive circuit (14);
The output of described three-phase alternating-current chopper (3) is connected with the input of described low pass filter (4); For carrying out pulse-width modulation pressure regulation to filtered three-phase alternating current;
The output of described low pass filter (4) is connected through the input of described current transducer (15) with three-phase high-voltage transformer (5); For carrying out low-pass filtering to the three-phase alternating current after pulse-width modulation pressure regulation;
The output of described three-phase high-voltage transformer (5) is connected with the input of described high-voltage rectifying filter unit (6); For boosting to the three-phase alternating current of low pass filter (4) output;
The negative output terminal of described high-voltage rectifying filter unit (6) is connected with the input of electric discharge choke circuit (7), and its positive output end is by electronic beam current sample resistance (9) ground connection; For carrying out 12 pulsating wave rectification and filtering to two groups of three-phase high-voltage alternating currents after boosting;
The output of described electric discharge choke circuit (7) is connected to the negative electrode of electron gun, for suppressing the climbing speed of electrion electric current, reduces the electromagnetic impact intensity that electric discharge produces;
Described high-pressure sampling circuit (8) is composed in series by high pressure drop piezoresistance R1 and high-voltage sampling resistance R2, is connected between electric discharge choke circuit (7) output and the earth; For detecting output high-voltage value, high-voltage sampling resistance R2 output is proportional to the voltage signal U of output high-voltage value as high-voltage feedback signal U, and high-voltage feedback signal U is sent to fault distinguishing circuit (10) and comparator (12);
Described electronic beam current sample resistance (9) is serially connected with between the low-pressure end of high-voltage rectifying filter unit (6) and the earth, for detected electrons line value, the output of its two ends is proportional to the voltage signal Ue of electronic beam current size as Beam Feedback signal Ue; And Beam Feedback signal Ue is sent to fault distinguishing circuit (10);
The output of described fault distinguishing circuit (10) is connected with the input of described control unit (11), high pressure regulator (13) and drive circuit (14) respectively; For by the magnitude of voltage of the changing value dU/dt of the magnitude of voltage of high-voltage feedback signal U, high-voltage feedback signal U, Beam Feedback signal Ue and primary current signal U ~ magnitude of voltage in contrast with its setting threshold respectively, arbitrary numerical value exceedes its setting threshold, then generate fault-signal Uer and be sent to control unit (11), high pressure regulator (13) and drive circuit (14);
The output of described control unit (11) is connected with the input of comparator (12); For generating high pressure Setting signal U
*be sent to comparator (12); Also for according to fault-signal Uer by high pressure Setting signal U
*block zero setting;
The output of described comparator (12) is connected with the input of described high pressure regulator (13); For by high pressure Setting signal U
*compare computing with high-voltage feedback signal U, export high voltage difference signal delta U=U
*-U is sent to high pressure regulator (13);
The output of described high pressure regulator (13) is connected with the input of described drive circuit (14); For high voltage difference signal delta U is carried out proportional, integral computing, export control signal Uc to drive circuit (14); Also for receiving fault-signal Uer, blocking control signal Uc according to fault-signal Uer and exporting;
Described drive circuit (14) is connected with described three-phase alternating-current chopper (3); Drive switching power tube VT1 in described three-phase alternating-current chopper (3) to switching power tube VT6 for generating drive singal after phase signal Us, control signal Uc are carried out integrated treatment; Also for receiving fault-signal Uer, block the driving pulse of copped wave pipe VT1, copped wave pipe VT3 and copped wave pipe VT5 according to fault-signal Uer;
The output of described current transducer (15) is connected with the input of described fault distinguishing circuit (10); For the three-phase alternating current after low-pass filtering being converted to linearly ratio output dc voltage U ~ as primary current signal U ~ transfer to fault distinguishing circuit (10).
2. a kind of electron curtain accelerating power source device according to claim 1, it is characterized in that: the elementary of described three-phase high-voltage transformer (5) is Y connection, described three-phase high-voltage transformer (5) have two groups secondary, wherein one group secondary is delta connection, another group is secondary is Y connection, and the line voltage of two groups of secondary winding is equal.
3. a kind of electron curtain accelerating power source device according to claim 1, it is characterized in that: described three-phase alternating-current chopper (3) comprises copped wave pipe VT1, copped wave pipe VT3, copped wave pipe VT5, continued flow tube VT2, continued flow tube VT4, continued flow tube VT6, and described low pass filter (4) comprises inductance L a, Lb and Lc and electric capacity Ca, Cb and Cc;
The c pole of described copped wave pipe VT1 exports with a phase of described line filter (1) and is connected, the e pole of copped wave pipe VT1 is connected with one end of inductance L a and the c pole of continued flow tube VT4 respectively, and the other end of described inductance L a is connected with a phase input of current transducer (15) with one end of electric capacity Ca respectively;
The c pole of described copped wave pipe VT3 exports with the b phase of described line filter (1) and is connected, the e pole of copped wave pipe VT3 is connected with one end of inductance L b and the c pole of continued flow tube VT6 respectively, and the other end of described inductance L b is connected with the b phase input of described current transducer (15) with one end of electric capacity Cb respectively;
The c pole of described copped wave pipe VT5 exports with the c phase of described line filter (1) and is connected, the e pole of copped wave pipe VT5 is connected with one end of inductance L c and the c pole of continued flow tube VT2 respectively, and the described inductance L c other end is connected with the c phase input of described current transducer (15) with one end of electric capacity Cc respectively;
The e pole of described continued flow tube VT2, continued flow tube VT4 and continued flow tube VT6 is connected together;
The other end of described electric capacity Ca, electric capacity Cb and electric capacity Cc is connected together.
4. a kind of electron curtain accelerating power source device according to claim 1, it is characterized in that: described high-voltage rectifying filter unit (6) comprises the first high-voltage rectifier bridge ZL601, second high-voltage rectifier bridge ZL601, first high-voltage capacitance C601 and the second high-voltage capacitance C602, first high-voltage rectifier bridge ZL601 ac input end connects with the secondary winding of the Y connection of described three-phase high-voltage transformer (5), first high-voltage capacitance C601 is attempted by the first high-voltage rectifier bridge ZL601 DC output end, second high-voltage rectifier bridge ZL602 ac input end connects with the secondary winding of the star-star-delta connection Y-Y-of described three-phase high-voltage transformer (5), second high-voltage capacitance C602 is attempted by the second high-voltage rectifier bridge ZL602 DC output end, first high-voltage rectifier bridge ZL601 is at high-pressure side, second high-voltage rectifier bridge ZL602 is at low-pressure end, as total output of high-voltage rectifying filter unit (6) after two rectifier bridge series connection.
5. a kind of electron curtain accelerating power source device according to any one of Claims 1-4, it is characterized in that: described electric discharge choke circuit (7) is composed in parallel by chokes reactor L1 and high pressure two pole D1 pipe, the anode of high-voltage diode D1 is as the input of described electric discharge choke circuit (7), the negative electrode of high-voltage diode D1 is as the output of described electric discharge choke circuit (7), and the output of described electric discharge choke circuit (7) is connected to the negative electrode of electron gun; The effect of chokes reactor L1 is the electric discharge immediate current of restriction first high-voltage capacitance C601 and the second high-voltage capacitance C602; The effect of high-voltage diode D1 prevents discharging current from terminating in chokes reactor L1 two ends generation overvoltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520682491.2U CN205004750U (en) | 2015-09-06 | 2015-09-06 | Electron curtain is power supply unit with higher speed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520682491.2U CN205004750U (en) | 2015-09-06 | 2015-09-06 | Electron curtain is power supply unit with higher speed |
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| CN205004750U true CN205004750U (en) | 2016-01-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140916A (en) * | 2015-09-06 | 2015-12-09 | 桂林电子科技大学 | Electronic curtain accelerating power source apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140916A (en) * | 2015-09-06 | 2015-12-09 | 桂林电子科技大学 | Electronic curtain accelerating power source apparatus |
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Inventor after: Wei Shouqi Inventor after: Li Xuejiao Inventor after: Cui Jiuxi Inventor after: Qin Yujiang Inventor before: Wei Shouqi Inventor before: Cui Jiuxi Inventor before: Li Xuejiao Inventor before: Qin Yijiang |
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