CN2039081U - Dual-purpose power supply for strong d.c. and pulse - Google Patents
Dual-purpose power supply for strong d.c. and pulse Download PDFInfo
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- CN2039081U CN2039081U CN 88214734 CN88214734U CN2039081U CN 2039081 U CN2039081 U CN 2039081U CN 88214734 CN88214734 CN 88214734 CN 88214734 U CN88214734 U CN 88214734U CN 2039081 U CN2039081 U CN 2039081U
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- pulse
- thyristor
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- power supply
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Abstract
The utility model discloses a dual-purpose power supply for strong D. C. and pulse, which is composed of a logic section and a triggering circuit, the trigger controls a thyristor connecting with the strong D. C. and pulse in prime position of a transformer. The electric current of the pulse peak can be reached to 20000 ampere, and the electric current of the pulse peak is larger than the current capacity which other schemes can be reached in household; eight kinds of pulse width can be selected, and in addition, the dual-purpose power supply for strong D. C. and pulse is provided with a digital high tension and digital voltage-stabilizing system. The strong D. C. and pulse has the advantages of simple circuit, saving element, easy adjustment, and one machine with multifunction. The power supply can be used for pulse current electrolytic machining; the utility model can be used for the electrolytic machining, and can be widely applied in the pulse plating, the electrolyzing, the electrical pulse, the combined machining and the plastic mould, etc.
Description
The utility model relates to a kind of heavy DC and pulse double-purpose electric source that is made of thyristor.This double-purpose electric source has wide practical use at aspects such as Pulse ECM Process, pulse plating, electrolysis and electric pulse Compound Machining.
The large current pulse power supply that adopts both at home and abroad earlier is rectified into DC power supply with AC power mostly at present, cuts into the pulse power with chopper or turn-off thyristor GTO then.This mode is complex structure, poor stability, cost of equipment height not only, and capacity is subjected to the restriction of device, domestic its electric current of the pulse power with chopper only reaches 2000 peaces (Ministry of Aeronautics Industry Beijing 625 research institutes), only reaches 200 with the pulse current of turn-off thyristor GTO and pacifies (University Of Tianjin).Introduced the pulse power schematic diagram that same model is N Π TY in " electric processing method of material " two books that " electric equipment of electrolytic machine tool " that the Soviet Union published in 1977 and nineteen eighty-two publish.This power supply is former side's pressure regulation, and the triggering of being controlled thyristor by control circuit forms pulse, and this just must form the low shortcoming of pulse frequency, and introducing its inter-train pause in the book is 0.1～1 second, also is that frequency is below 10 He Zhi.
The object of the present invention is to provide a direct current and pulse double-purpose electric source, capacity is big, electric current is big, cost is low, has eight kinds of pulse frequencies can supply to select for use, i.e. 60HZ, 37.5HZ, 30HZ, 20HZ, 18.75HZ, 12.5HZ, 10HZ, 6.25HZ.
The utility model is the continuity of inventor to its 88100012.4 application for a patent for invention.
The utility model is to realize like this.Thyristor in 88100012.4 applications for a patent for invention is changed into and is connected on the former side's (see figure 2) of transformer, the transformer side of the paying diode rectification of two bifurcation shapes band interphase reactors of low-voltage and high-current from the original rectifier transformer side of the paying (see figure 1) that is connected on.Because the former side's of transformer electric current is less, the every mutually forward and reverse of winding uses single thyristor or a small amount of parallel connection can satisfy capacity requirement, the problem of having avoided many parallel connections of thyristor to be occurred, and a plurality of parallel connections of the diode of the transformer side of paying realize easily, thereby the acquisition rectification output current bigger than 88100012.4 applications for a patent for invention, pulse peak current can reach 20000 amperes, to satisfy the needs of more jumbo Pulse ECM Process, pulse plating and electrolysis and electric pulse Compound Machining.
Below in conjunction with the circuit drawings and Examples the utility model is done detailed description.
Fig. 1 is the block diagram of 88100012.4 applications for a patent for invention.
Fig. 2 is a block diagram of the present utility model.
Fig. 3 is major loop of the present utility model and control circuit.
Fig. 4 is logic switch of the present utility model and circuits for triggering.
Fig. 5 is beat of the present utility model and automatic synchronous circuit of phase sequence and each point waveform.
Fig. 6 is digit pulse voltmeter of the present utility model and digital voltage-stabilizing system.
Fig. 7 is a digit pulse voltmeter each point waveform of the present utility model.
Major loop of the present utility model and control circuit (see figure 3), the negative electrode of six thyristors does not link to each other, therefore the trigger impulse of every thyristor is all isolated with pulse transformer PB, change the angle of flow of thyristor, just can change the conduction time of rectifier transformer primary winding, corresponding also the change paid the time that produces induced potential in the winding, thereby can change the size of rectifier output voltage.The instruction that logical block is given according to the button break-make, control triggering electric circuit all sends trigger impulse at every turn or sends trigger impulse regularly in turn according to synchronizing signal, control each cycle triggering and conducting (direct current) of thyristor or triggering and conducting (various pulse current) in turn regularly, thereby obtain the pulse current of direct current or multiple frequency.
The utility model again in order to make each phase current equilibrium of transformer, can be listed 10 kinds of beat tables (seeing Table 1) that trigger each phase thyristor in turn according to the conventional frequency and the duty ratio of Electrolyzed Processing pulse current, can obtain the pulse current of eight kinds of frequencies.Z represents direct current in the table 1, and the circulation of P, Q, R, S, T is 10 beats, and the circulation of U, V, W is 16 beats, and the circulation of X, Y is 8 beats, and Arabic numerals are the beat number.
Beat generator is served as (see figure 4) by four 2 system 12～10 system forward-backward counters 4029 and 4～16 line decoders 4514, when the key switch HK903 that selects pulse beats in U, V, W, X, Y arbitrary grade, by or door to do to make 4029 9 pin BI/ DE after the logic add be 1, then 4029 make 16 system plus coujnts, when X, Y second gear, be connected on the NOR gate output low level of this second gear, with the highest order output of sealing 4029 crus secundas with door, though then 4029 make 16 system counters, be input to 4514 be 8 system signals.Otherwise when HK903 did not beat in U, V, W, X, Y arbitrary grade, 4029 9 pin were 0,4029 to make 10 system plus coujnts, and four output signals of 4029 are decoded into 16 line output signal Q through 4514
0～Q
15, when 4029 make 10 system plus coujnts, 4514 Q
10～Q
15Be 0 forever, only at Q
0～Q
7Between circulation output 1.When HK903 beats at X, Y second gear, 4514 Q
8～Q
15Be 0 forever, only at Q
0～Q
7Between circulation output 1.
4029 count pulse is by synchrotrans B winding B in the side of paying mutually
12-Y
12Sine wave behind shaping and differential, form at sinusoidal wave zero crossing.Connect because the former side of main transformer is △, the former side of synchrotrans is that Y connects, so 30 ° of former side's phase lags of the synchrotrans side of paying phase place main transformer, because B
12Leading mutually A
160 ° mutually.So beat replaces for preceding 30 ° at the former side AB of main transformer phase zero crossing.Capacitor C
921(see figure 5) is with 4514 10 pin Q
3(when 4029 are output as 0010, Q
3High level) inversion signal integration makes Q again behind an inverter
3Moved very short time behind the signal, if the stochastic regime in when start is B
12During the zero passage that rises mutually, the differential circuit C behind two reshapers
910R
951The counting spike that forms makes 4029 odd numbers, then makes 4514 generation Q counting down to
4(Q when 4029 are output as 0011
4Be high level) during signal, this counting spike with after the Q that moved
3Signal overlap, two inputs with door in overlapping period Fig. 3 are high level, and output be high level also, delivers to 4029 1 pin PE end and makes it put number, owing to 4029 give and put several inputs and be connected into 0100, makes 4514 Q immediately
4Keep low level, Q
5Become high level, this circuit can make B
12The counting spike that forms during the zero passage that rises mutually makes 4029 output even numbers, becomes odd number beat and phase sequence A after decoder 4514 decodings
1, C
2, B
3Synchronously, reaching under this synchronous situation B
12The counting spike that forms during the zero passage that rises mutually not can with after the Q that moved
3Signal overlap can not produce to give again and put gating signal PE, thereby can not upset this beat that has reached and the synchronized relation between the phase sequence again.
Can write out the logical expression of each phase logic switch according to beat table 1:
A
1＝Z＋3W＋7（U＋V）＋1＋5T＋13U
C
2＝Z＋3W＋7（U＋V）＋1 P＋9P
B
3＝Z＋1 P+Q+X+3（W＋X）＋7（P＋Q＋T＋U）＋11（U＋V）
A
4＝Z＋2（S＋W＋Y）＋12（U＋V）＋6R＋4W＋2（U＋V）＋8（Q＋T）＋4X＋6P
C
5＝Z＋2（S＋W＋Y）＋12（U＋V）＋6R＋4W＋4（Q＋T）＋6（U＋V＋X）＋8T＋4P＋2U
B
6＝Z＋2（S＋W＋Y）＋12（U＋V）＋6R＋4W＋4（Q＋T）＋6（U＋V＋X）＋2P
Odd number beat corresponding A
1, C
2, B
3Phase, their phase shifting angle will extend to next beat, in like manner the A of even numbers beat correspondence
4, C
5, B
6Therefore the phase shifting angle of phase also will extend to next beat, all should add next joint time signature during by the joint time signature design logic figure in the logical formula, the output signal that is about to beat decoder 4514 with or the next time signature that saves of goalkeeper make logic add.So can design logic switch and be subjected to circuits for triggering such as Fig. 4 of its signal controlling according to logical formula.
The digit pulse voltmeter of Fig. 6 is the double integrator pattern number converter that constitutes with medium scale integrated circuit and is equipped with composition such as digit translation demonstration, the design philosophy of digit pulse voltmeter is to carry out voltage sample when whenever the various pulse frequencies of first beat and direct current output being arranged all, sampling finishes before pulse disappears, after the number conversion of double integrator pattern, just can show the average pulse value of pulse voltage, when direct current is exported, then show dc voltage average value.Because the conversion speed of finished product double integrator pattern number converter large scale integrated circuit is low, can not satisfy and during various pulse durations, finish sampling, therefore can only constitute with medium scale integrated circuit.In order to improve conversion accuracy, by the frequency that 4 megahertz quartz oscillators produce, make 16 frequency divisions, again kind frequency when the secondary d type flip flop is made 4 frequency divisions and become 62.5 kilo hertzs of stable analog to digital converters through 1/2 4520 counters.Three figure places of the counter in the analog to digital converter, because output voltage is up to 28 volts, one digit number can meet the demands after showing decimal point, the preceding secondary of counter two 2～10 system counters 4518 of a slice, back one-level is with low two in the 16 system counters 1/2 4520, and the integration of sampling for the first time finishes by 400 o'clock three grades of rolling counters forwards, lasts 400 ÷ 62.5=6.4 milliseconds, the short pulse width of this power supply can finish in the impulse duration sampling generally greater than 6.4 milliseconds.
Be the null offset of eliminating integrator and comparator in the analog to digital converter influence to conversion accuracy, these two all adopts from steady zero operational amplifier 7650, integrator and comparator add that several gate circuits and analog switch constitute the artificial circuit part in the analog to digital converter, the simulation part must link to each other with the major loop of power supply, and the digital circuit part must separate with major loop in order to prevent to disturb, so the signal transmission between this two part separates with three photoelectrical couplers.
Decoder 4514 the 11st pin becomes high level and indicates beat 1 beginning, through R
64C
83Differential circuit and inverter the 6th pin that makes dual time base circuit 7556 gets a low level burst pulse and at the 5th pin output high level, this burst pulse is at A
1Zero trigger angle is preceding 60 ° mutually, requires voltage ratio higher when power supply is made pulse application, and phase shift range can be not big, about 40 ° of maximum phase shifting angle, and therefore occurring back 100 ° in above-mentioned burst pulse is that 0.55 millisecond of ability begins sampling, makes R
48C
74About 0.55 millisecond of the about 0.55 millisecond of high level width that just can make 7556 the 5th pin of time constant, the trailing edge of this high level pulse is through anti-phase and R
98C
82High level burst pulse behind the differential makes 4518 and 1/2 4520 zero clearings, and at this moment the 5th of 4520 the, 6 pin are low level, makes Q through two optical couplers
3And Q
4Signal is a high level, and it is high right low to be turned into a left side by one two input, rest-set flip-flop that three input nand gates are formed, and so just makes bidirectional switch K
3Control end 0 and disconnect bidirectional switch K
1Control end be 1 and closed, so the output voltage U d+ of power supply is through R
94, R
95The 10:1 dividing potential drop after send into 7650 the 4th pin that are connected into integrator and carry out the integration first time, R
92C
91Be integrating resistor and electric capacity, meanwhile, the signal LE that is transferred to the digital circuit part by another photoelectrical coupler is uprised by low, the pulse that crystal oscillator is produced is delivered to rolling counters forward through NAND gate and frequency dividing circuit, when 400 count pulses of input, 1 of 4520 the 5th pin change makes Q
3Signal is 0, and at this moment rest-set flip-flop does not overturn, but makes bidirectional switch K
1Disconnect, integration finishes for the first time and since 1/2 4520 have only low two as sample count, when not including the Senior Two position, counter gets back to zero again, bidirectional switch K
2Closure is from potentiometer R
75On the negative reference voltage of drawing send into integrator and carry out the reverse integral second time, counter counts from zero again, when the output signal zero passage of integrator, is connected into 7650 input the 4th pin signal change direction of comparator, its signal of exporting the 10th pin is by high step-down, through differential circuit R
84C
84Make the rest-set flip-flop upset, bidirectional switch K
2Disconnect, integration finishes for the second time, bidirectional switch K
3Closure makes C
91Bleed off residual voltage, for sampling is next time got ready, the LE signal is by high step-down simultaneously, block the output of crystal oscillator, counter stops counter, institute's count word is exactly tested voltage number under the situation of reference voltage adjusting, the LE signal is through anti-phase, differential is oppositely delivered to low level burst pulse of 4511 the 5th pin again, latch in 4511 is opened the door, numeral in the counter is sent into 4511 decodings and is shown tested voltage number by charactron, because top digit can be greater than 3, so highest order counter 1/2 4520 has only the 3rd, 4511 high-order decodings are delivered in low two outputs of the 4th pin.So far one-off pattern number conversion finishes, and treats that beat 1 comes then to begin again analog-to-digital conversion next time next time, referring to the digit pulse voltmeter each point waveform of Fig. 7.
The numeral voltage-stabilizing system is to realize like this, the voltage number is put in giving of tested output voltage several during counter stops to count and plucking number sign switch, the power of casting out in the lower-order digit 2 is weighed 1, deliver to comparison in two comparators 4585 with all the other 8, cast out minimum two purpose and be and make output voltage put several errors only in the pairing output voltage several of binary system two figure places the time with giving, then the output voltage actual number with give put the number equate, high position 4585 the 3rd pin output high level, seal 24 inputs or door, make digital constant in two 40193 that the double as digital memory uses, when virtual voltage greater than giving when putting voltage, high-order 4585 12 pin are 1, the 3rd and 13 pin are 0, following 4 inputs or door are sealed, top deblocking, move when connecting circuits for triggering two TJ contacts among Fig. 6, through make as the rest-set flip-flop of antihunting circuit its link two or input be 0, so above the low level pulse on beat 1 beginning time 7556 the 6th pin makes or 4 inputs of door be 0 entirely, low level 40193 the 4th pin subtraction input is received in its output, when this low level finishes, make 40193 to subtract 1, then the numeral in two 40193 subtracts 1, the given voltage of phase-shift trigger circuit is reduced, the angle of flow of thyristor is reduced, output voltage also reduces, and promptly draws close to giving putting to count.When virtual voltage less than giving when putting voltage, high-order 4585 13 pin are 1, the 3rd and 12 pin are 0, then when beat 1 beginning, make the numeral in two 40193 add 1, thereby output voltage is increased, also be to draw close to giving putting to count, that is to say the actual number of voltage with give when putting number error being arranged, numeral in the once sampling correction 40193, when equating, each figure place except that binary system hangs down two stops to revise, at this moment pulse output crest voltage or direct voltage just are stabilized in toggle switch and give and putting near the number, and its error is in 2% allowed band.DAC0808 is 8 figure place weighted-voltage D/A converters, makes summing amplifier for one 7650 below Fig. 6, delivers to phase-shift trigger circuit from the analog quantity that digital quantity converts to from No. 910 lines.
When power supply is started shooting, numeral in two 40193 is as being random number, then may put number and differ greatly and cause output voltage to reach to give that to put several time longer with giving with the output voltage of its control, because the processing desired output voltage is over half at ceiling voltage generally, process for the first time output voltage and reach to give and put several time in order to shorten start back, after start, utilize through R
67To C
72About 56 milliseconds charging interval in 7556 the 12nd pin be low level, then 7556 the 9th pin are high level, make two 40193 the 11st pin keep about 56 milliseconds of low levels, make the octet of two 40193 device for posting 3/4ths through inverter, therefore the output voltage of processing is about 3/4ths of peak for the first time, this is the median of machining voltage commonly used, put number and draw close generally in 5 seconds to giving from this numerical value, this uses reality and does not hinder.Among Fig. 6 be failure to actuate stopping to add man-hour in two TJ contacts, through rest-set flip-flop output high level to two or input, make it to seal the numeral in two 40193, add next time and obtain original magnitude of voltage man-hour immediately, this is necessary to batch machining.
Utilize the above-mentioned pulse power that is developed into to go out multiple kinds of molds with the electrolysis processes, obtained good effect, it for example is the plastic casing mould of Hefei element seven factories processing dust catcher, as processing without pulse current, since add man-hour electrode and mould between the gap inhomogeneous, this inhomogeneities is difficult in calculated in advance and comes out, electrode shape will be through repeatedly revising after the examination processing repeatedly, the plastic products mould is processed one because of durable often only the need, owing to determine that electrode shape is very difficult, so can not bring into play electrolytic processing process efficient height, highly polished, advantages such as not loss of electrode.The processing of use pulse current, its add man-hour electrode and mould between the gap even substantially, electrode shape evenly dwindles according to mold shape, once just can add formula and go out qualified mould, makes electrolytic processing process only be suitable for processing forging die originally and expands to energy processing plastic goods mould.
Claims (3)
1, a kind of heavy DC and pulse double-purpose electric current that constitutes by thyristor, it is characterized in that: described double-purpose electric source is made up of logical circuit, thyristor gating circuit, digital voltage regulation and digital voltage regulator (comprising the digit pulse voltmeter) etc., and thyristor is connected on the former side of rectifier transformer.
2, by described direct current of claim 1 and pulse double-purpose electric source, it is characterized in that: described logical circuit has six switching signals, the circuits for triggering of six thyristors of control, under the control of key switch, can produce 11 kinds of well-regulated switching signals, continuous or the well-regulated trigger impulse that intermittently sends with control triggering electric circuit, make the well-regulated defeated conductance of thyristor logical, thereby form direct current and 8 kinds of pulse voltages, its output voltage is regulated by the trigger angle of thyristor.
3, by described direct current of claim 1 and pulse double-purpose electric source, it is characterized in that: described digit pulse voltmeter is to utilize when pulse voltage output is arranged to sample, thereby can show the average pulse value of pulse voltage, also can show direct current mean value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88214734 CN2039081U (en) | 1988-10-13 | 1988-10-13 | Dual-purpose power supply for strong d.c. and pulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88214734 CN2039081U (en) | 1988-10-13 | 1988-10-13 | Dual-purpose power supply for strong d.c. and pulse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2039081U true CN2039081U (en) | 1989-06-07 |
Family
ID=4847629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88214734 Expired - Lifetime CN2039081U (en) | 1988-10-13 | 1988-10-13 | Dual-purpose power supply for strong d.c. and pulse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2039081U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060423C (en) * | 1994-07-29 | 2001-01-10 | 中国人民解放军装甲兵工程学院 | Repairing method for tools and dies and repairing machine |
| CN106816069A (en) * | 2015-12-01 | 2017-06-09 | 重庆尊来科技有限责任公司 | A kind of two input nand gate formula frequency scopes |
| CN106847012A (en) * | 2015-12-03 | 2017-06-13 | 重庆尊来科技有限责任公司 | A kind of electricity demonstration device of gradual luminescence display |
| CN106847013A (en) * | 2015-12-07 | 2017-06-13 | 重庆尊来科技有限责任公司 | A kind of electricity scientific popular instrument |
| CN106847014A (en) * | 2015-12-07 | 2017-06-13 | 重庆尊来科技有限责任公司 | A kind of three colors display electricity demonstration device |
| CN106887179A (en) * | 2015-12-16 | 2017-06-23 | 重庆尊来科技有限责任公司 | The electricity demonstration device of differential amplification |
| CN106898207A (en) * | 2015-12-17 | 2017-06-27 | 重庆尊来科技有限责任公司 | Autoexcitation formula lifts circuit heuristics |
| CN106920441A (en) * | 2015-12-25 | 2017-07-04 | 重庆尊来科技有限责任公司 | A kind of discharge lag type double-purpose heuristics |
| CN111464017A (en) * | 2020-03-03 | 2020-07-28 | 广州爱申特科技股份有限公司 | High-frequency switch power supply for producing fluorine by industrial electrolysis and control method thereof |
| CN116027194A (en) * | 2023-03-29 | 2023-04-28 | 河北水利电力学院 | Motor fault monitoring system |
-
1988
- 1988-10-13 CN CN 88214734 patent/CN2039081U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060423C (en) * | 1994-07-29 | 2001-01-10 | 中国人民解放军装甲兵工程学院 | Repairing method for tools and dies and repairing machine |
| CN106816069A (en) * | 2015-12-01 | 2017-06-09 | 重庆尊来科技有限责任公司 | A kind of two input nand gate formula frequency scopes |
| CN106847012A (en) * | 2015-12-03 | 2017-06-13 | 重庆尊来科技有限责任公司 | A kind of electricity demonstration device of gradual luminescence display |
| CN106847013A (en) * | 2015-12-07 | 2017-06-13 | 重庆尊来科技有限责任公司 | A kind of electricity scientific popular instrument |
| CN106847014A (en) * | 2015-12-07 | 2017-06-13 | 重庆尊来科技有限责任公司 | A kind of three colors display electricity demonstration device |
| CN106887179A (en) * | 2015-12-16 | 2017-06-23 | 重庆尊来科技有限责任公司 | The electricity demonstration device of differential amplification |
| CN106898207A (en) * | 2015-12-17 | 2017-06-27 | 重庆尊来科技有限责任公司 | Autoexcitation formula lifts circuit heuristics |
| CN106920441A (en) * | 2015-12-25 | 2017-07-04 | 重庆尊来科技有限责任公司 | A kind of discharge lag type double-purpose heuristics |
| CN111464017A (en) * | 2020-03-03 | 2020-07-28 | 广州爱申特科技股份有限公司 | High-frequency switch power supply for producing fluorine by industrial electrolysis and control method thereof |
| CN111464017B (en) * | 2020-03-03 | 2021-07-06 | 广州爱申特科技股份有限公司 | High-frequency switch power supply for producing fluorine by industrial electrolysis and control method thereof |
| CN116027194A (en) * | 2023-03-29 | 2023-04-28 | 河北水利电力学院 | Motor fault monitoring system |
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