CN100590956C - Pressure regulating on-off circuit - Google Patents
Pressure regulating on-off circuit Download PDFInfo
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- CN100590956C CN100590956C CN200710071038A CN200710071038A CN100590956C CN 100590956 C CN100590956 C CN 100590956C CN 200710071038 A CN200710071038 A CN 200710071038A CN 200710071038 A CN200710071038 A CN 200710071038A CN 100590956 C CN100590956 C CN 100590956C
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Abstract
The invention discloses a voltage-regulation switching circuit, comprising a voltage circuit (for conversion of high/low voltage of the imported AC power supply), a controllable silicon rectifying filter circuit (connected to the output end of the voltage-transforming circuit, and rectifying and filtering the secondary alternating current) and a trigger circuit (used to control the rectifying filter circuit to switch on/off). The voltage-transforming circuit comprises a main circuit transformer and also comprises an AC booster connected to the main circuit transformer; the trigger circuit comprises an auxiliary DC power-supply circuit and a signal generator circuit; the trigger and conduction end of the controllable silicon rectifying filter circuit is connected to the signal output end ofthe signal generator circuit. The invention adopts an AC booster to regulate the output voltage; because no potentiometer is adopted, no extra power loss occurs, and as a result, the normal operationof the electromagnet testing circuit under high power is achieved; besides, controllable silicon rectifying filter circuit can be adopted to realize switching control of 0 up to 30 times/second.
Description
Technical field
The invention belongs to the regulator rectifier circuit technical field of AC power, particularly relate to a kind of instrument of the dynamic and static characteristic that is used to detect electric components such as electromagnet or relay or the voltage regulation of electric power sources switching circuit of equipment.
Background technology
Electromagnet is an electromagnetic actuator commonly used in electromechanical integration and the automation electric control system, as a dynamical element, its performance directly has influence on the element that is made of it and the overall performance of device, therefore the performance of electromagnet is tested being very important.About the performance index of electromagnet, static properties and dynamic property two classes are arranged usually, test process needs the electromagnet detecting instrument to provide and meets necessarily required operating current and voltage.When carrying out the static characteristic test, often need bigger operating current and need the continuously adjustable test voltage; When carrying out dynamic characteristic test, then require instrument to have bigger switching current and higher switching frequency.
AC power regulator rectifier circuit principle of the prior art, as shown in Figure 1, AC network is through transformer 1 ' certain alternating voltage of acquisition, then by rectification circuit 2 ' industrial-frequency alternating current is converted to Rectified alternating current, use filter circuit 3 ' again, reduce alternating component, increase flip-flop the alternating component filtering in the pulsating direct current, after a voltage stabilizing circuit 4 ', to the direct voltage after the rectification further stablize obtain the direct-current working volts 5 that need '.At present, on existing AC power regulator rectifier circuit principle basis,, also have many new technical schemes constantly to be proposed in order to obtain better output characteristic of power source.As application number is that 94247675.1 (CN2218943Y) " constant current is exported continuous adjustable D.C. regulated power supply " disclose a kind of constant current and export continuous adjustable D.C. regulated power supply, it comprises isolated voltage regulating transformer and adopts the adjustable integrated voltage adjuster of three ends, the elementary power supply that connects of transformer, secondaryly connect with rectifier, secondary voltage is adjustable, sliding contact and output voltage regulator potentiometer adjusted in concert.Though this circuit has realized that the output of stabilized voltage power supply is adjustable continuously, adopt deflection machine adjusted in concert voltage in the circuit, still can produce certain pressure drop loss, and this circuit can't be realized bigger switching current and higher switching frequency.
And for example the patent No. is that the Chinese utility model " high-power, the pressure regulation of no voltage regulator, rectifying installation " of ZL94240764.4 (notification number is CN2195824Y) discloses a kind of employing and many groups are set on primary coil regulate the pressure regulation that the by-pass cockes of input voltages are realized no voltage regulator.But sort circuit can't be realized the stepless continuous adjustment to voltage.The patent No. is that the Chinese utility model " modular AC power automatic voltage regulator " of ZL92217764.3 (notification number is CN2129946Y) includes transformer, rectification circuit, regulating circuit and relay for another example, its main feature is that regulating circuit adopts a ZTY module to become with an adjustable resistor group, when grid voltage change, sampling voltage is lifting thereupon, ordering about the suction of ZTY module controls relay puts, realize changing-over transformer output tap, reach the purpose of automatic regulation voltage.Yet this circuit is owing to put the pressure regulation of changing-over mode by relay control suction, and range of regulation is limited, still is difficult to realize the continuous stepless pressure regulation.
Because the dynamic and static characteristic of electromagnet requires the instrument of test electromagnet performance that special requirement is arranged on power supply, according to the AC power regulator rectifier circuit principle of above-mentioned prior art and relevant patented technology improvement project, in the static properties test, but for obtaining the continually varying test voltage, usually on dc output circuit, adopt potentiometer to realize the voltage adjustment, but the use of potentiometer often forms bigger internal resistance, needs consume additional power, influences measuring accuracy; And in dynamic performance testing, often utilize relay tip or manually the mode of plate key break-make can't obtain to stablize, higher switching frequency, influence the test effect of dynamic property.Therefore, these bring certain difficulty all for the electromagnet Performance Detection technically, await to do further research and improvement.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of voltage of can realizing to regulate, do not have the pressure regulating on-off circuit with switching function of excess power loss continuously at above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this pressure regulating on-off circuit includes
One transforming circuit is realized the high-low pressure transformation conversion to the AC power of input;
One silicon controlled rectifier filter circuit connects the output of described transforming circuit, and realizes rectification, filtering to the secondary alternating current after the above-mentioned transformation; And
One circuits for triggering are used for controlling the conducting of described silicon controlled rectifier filter circuit and closing;
It is characterized in that: described transforming circuit includes AC voltage regulator and the main circuit transformer that links to each other in turn, described circuits for triggering include auxiliary direct current source circuit and signal generator circuit, and the triggering and conducting end of described silicon controlled rectifier filter circuit links to each other with the signal output part of described signal generator circuit.
Described silicon controlled rectifier filter circuit can adopt existing various circuit connecting mode, preferably adopt following circuit: it includes first controllable silicon, second controllable silicon, first optocoupler, second optocoupler, first diode, second diode, and first resistance, second resistance, first filter capacitor;
Wherein, the anode one tunnel of described first diode links to each other with an output of described transforming circuit, another road links to each other with the described first silicon controlled anode, the negative electrode of first diode connects the collector output of described first optocoupler through first resistance, the emitter output of first optocoupler links to each other with the first silicon controlled trigger end, the input diode negative electrode of first optocoupler is connected with the input diode anode of second optocoupler, the first silicon controlled negative electrode is as the delivery outlet of whole silicon controlled rectifier filter circuit, and the signal output part of the first optocoupler input diode anode and signal generator circuit links to each other;
The anode one tunnel of described second diode links to each other with another output of described transforming circuit, another road links to each other with the described second silicon controlled anode, the negative electrode of second diode connects the collector output of described second optocoupler through second resistance, the emitter output of second optocoupler links to each other with the second silicon controlled trigger end, the input diode minus earth of second optocoupler, the second silicon controlled negative electrode are connected the back and are connected with an end of first filter capacitor with the first silicon controlled negative electrode concurrent.
Described auxiliary direct current source circuit can include transformation, these several elementary cells of rectifying and wave-filtering and voltage stabilizing, all can be used as auxiliary direct current source circuit of the present invention as long as can realize the power circuit of direct current output, preferably adopt and include transformer, bridge rectifier, second filter capacitor, the 3rd filter capacitor and have an input, the circuit of the three terminal regulator of output and earth terminal, wherein, two inputs of described bridge rectifier link to each other respectively with the output of transformer, first output head grounding of bridge rectifier, second output one tunnel links to each other with the input of described three terminal regulator, another road second filter capacitor ground connection, the output of three terminal regulator is through the 3rd filter capacitor ground connection.
Described signal generator circuit can be various existing square-wave generators or multivibrator, preferably adopting with 555 timers is that the multivibrator of core is the trigger of silicon controlled rectifier filter circuit of the present invention, it mainly produces square-wave signal and triggers, the output of this 555 timer links to each other as the signal output part of this signal generator circuit and the triggering and conducting end of silicon controlled rectifier filter circuit after being connected in series the 3rd resistance, and the low level reset terminal of 555 timers links to each other as the input of this signal generator circuit and the output of three terminal regulator.
In order to obtain better to export direct-current working volts and electric current, described pressure regulating on-off circuit can also include the 3rd diode and the 4th diode, wherein, the anode of described the 3rd diode links to each other with an end of described first filter capacitor, the negative electrode of the 3rd diode links to each other with the negative electrode of described the 4th diode, and the anode of the 4th diode links to each other with the other end of first filter capacitor.So, can provide low internal resistance high power DC output by the 3rd diode that plays a protective role, the 4th diode can adapt to big electric current inductive load then as fly-wheel diode, and the discharge loop after the outage is provided.
Compared with prior art, the invention has the advantages that: at first, adopted AC voltage regulator to adjust output voltage, the efficient height, the instrument heating is little, be fit to long time continuous working, can guarantee to adjust output voltage continuously under big electric current, the low internal resistance condition, can be used in aging and life test electromagnet; Secondly, owing to do not use potentiometer, no excess power loss has guaranteed that the electromagnet test circuit is at high-power requirements of one's work down; In addition, adopt the silicon controlled rectifier filter circuit, realized exporting from 0 to the switch control of the highest per second more than 30 times, add controllable silicon and only be used for the full wave type dc switch, do not produce interference, power consumption is low, can be used in the operating frequency of electromagnet and the test in useful life.Therefore, pressure regulating on-off circuit of the present invention adopts the scheme of rectification after the first pressure regulation, when different output voltage, all can provide maximum rated output current, and entire circuit is simple in structure, volume is little, reliability is high, easy to use.
Description of drawings
Fig. 1 is a prior art pressure regulating on-off circuit theory diagram.
Fig. 2 is the pressure regulating on-off circuit theory diagram of the embodiment of the invention.
Fig. 3 is the physical circuit schematic diagram of the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Be illustrated in figure 2 as schematic block circuit diagram of the present invention, this pressure regulating on-off circuit includes the transforming circuit 1 of realization to the high-low pressure transformation conversion of the AC power of input, the rectification of the secondary alternating current of realization after, the silicon controlled rectifier filter circuit 2 of filtering, and the circuits for triggering 3 of controlling the conducting of described silicon controlled rectifier filter circuit and closing to above-mentioned transformation.Wherein, described transforming circuit 1 includes main circuit transformer T2, also includes the AC voltage regulator T1 that is connected with described main circuit transformer T2, and the input of SCR rectification circuit 2 links to each other with the output of transforming circuit 1 respectively; And described circuits for triggering 3 include the auxiliary direct current source circuit of being made up of transformation, rectification and voltage regulation unit 31, and signal generator circuit 32, the triggering and conducting end 21 of described silicon controlled rectifier filter circuit 2 links to each other with the signal output part 321 of described signal generator circuit 32.
As shown in Figure 3, be the physical circuit schematic diagram of a preferred embodiment of the present invention.
Grid alternating current input AC voltage regulator T1 regulation voltage, and obtain secondary ac output voltage through main circuit transformer T2, the anode one tunnel of the first diode D1 links to each other with the output of described main circuit transformer T2, another road links to each other with the anode of described first controllable silicon SCR 1, the negative electrode of the first diode D1 connects the collector output of the described first optocoupler OPT1 through first resistance R 1, the emitter output of the first optocoupler OPT1 links to each other with the trigger end of first controllable silicon SCR 1, the input diode negative electrode of the first optocoupler OPT1 is connected with the input diode anode of the second optocoupler OPT2, and the negative electrode of first controllable silicon SCR 1 is as the delivery outlet of whole silicon controlled rectifier filter circuit;
The anode one tunnel of the described second diode D2 links to each other with another output of described transforming circuit 1, another road links to each other with the anode of described second controllable silicon SCR 2, the negative electrode of the second diode D2 connects the collector output of the described second optocoupler OPT2 through second resistance R 2, the emitter output of the second optocoupler OPT2 links to each other with the trigger end of second controllable silicon SCR 2, the input diode minus earth of the second optocoupler OPT2, the negative electrode of second controllable silicon SCR 2 are connected the back and are connected with the end of the first filter capacitor C1 with the negative electrode concurrent of first controllable silicon SCR 1;
And the end of the first filter capacitor C1 links to each other with the anode of the 3rd diode D3, and the negative electrode of the 3rd diode D3 links to each other with the negative electrode of the 4th diode D4, and the anode of the 4th diode D4 then links to each other with the other end of the first filter capacitor C1;
In addition, the direct again simultaneously input transformer T3 of AC power carries out transformation, and process bridge rectifier D5 carries out rectification, two inputs of described bridge rectifier D5 link to each other respectively with the output of transformer T3, the first output Out1 ground connection of bridge rectifier D5, the second output Out2 one tunnel links to each other with the input Vin of described three terminal regulator U1, another road second filter capacitor C2 ground connection, the output end vo ut one tunnel of three terminal regulator U1 is through the 3rd filter capacitor C3 ground connection, and another road links to each other with the multivibrator that with 555 timer U2 is core.The multi-harmonic-oscillations implement body connecting circuit that described 555 timer U2 are core is: the direct ground connection of 1u pin of 555 timer U2, wherein, low level reset terminal 4u pin meets the output end vo ut of pressurizer U1, as the power input of 555 timer U2, and 8u pin and described 4u pin concurrent; Control end 5u pin is through the 5th capacitor C 5 ground connection; Threshold voltage end 6u pin and trigger end 2u concurrent and through the 4th capacitor C 4 ground connection; Discharge end 7u pin one tunnel connects the end of potentiometer R0, and receive on the output 3u on another road, and the other end one tunnel of potentiometer R0 is ground connection after the 4th capacitor C 4, another road ground connection after K switch; Described output 3u pin is connected in series the 3rd resistance R 3 backs and links to each other with the input diode anode of the described first optocoupler OPT1.
The basic functional principle of present embodiment circuit is as follows:
Because the needs of electromagnet performance test, if adopt general direct current voltage reulation voltage stabilizing circuit, because its internal power consumption is too high, when doing the life test of measurand, need work long hours, so the present invention adopts aforesaid circuit, alternating current input power supplying is at first finished the adjustment of output voltage by 500W AC voltage regulator T1, raise the efficiency with this, reduce the internal power consumption that produces.Guarantee low internal resistance and carry out voltage transformation and export secondary alternating voltage through main circuit transformer T2 then, utilize the full-wave rectification of silicon controlled rectifier filter circuit to finish the conversion of alternating current-direct current again.
Wherein, the first optocoupler OPT1, the second optocoupler OPT2 in the silicon controlled rectifier filter circuit can play the isolation blocking effect effectively when controllable silicon is closed; the signal that prevents terminal output current and voltage disturbs; the first diode D1, the second diode D2 that are arranged in the silicon controlled rectifier filter circuit then realize the anti-back-pressure protection of controllable silicon as the protection diode, and first resistance R 1 wherein, second resistance R 2 can be the build-out resistor of the silicon-controlled device that adapts to different model.
The silicon controlled rectifier filter circuit is by by the frequency that with 555 timer U2 is core being the adjustable square-wave generator acquisition triggering signal of 0～30PPS, realize the switching function of controllable silicon full-wave direct current, the cycle of switch is by 555 timer U2 triggering for generating, and adjusted the pulse frequency of output by the potentiometer R0 on the timer peripheral circuit.
The concrete operation principle of described square-wave generator is as follows: K switch is opened, when output 3u is high level, potentiometer R0 is to 4 chargings of the 4th capacitor C, as the 2u of 555 timer U2, when the 6u terminal voltage surpasses 2/3 input voltage, output becomes low level, the conducting of 7u end discharge end, the 4th capacitor C 4 is by potentiometer R0 discharge; When be discharged to 2u, when the 6u terminal voltage is lower than 1/3 input voltage, output 3u becomes high level again because potentiometer R0 resistance is adjustable, vibration so repeatedly forms the output of frequency adjustable square wave.
With the K switch closure, the 4th capacitor C 4 is by short circuit, 555 timer U2 can't form multi-harmonic-oscillations, output 3u keeps high level always, so the first optocoupler OPT1, the second optocoupler OPT2 conducting all the time, first controllable silicon SCR 1, second controllable silicon SCR 2 can be regarded two diodes as, are in conducting state all the time.
Therefore, when K switch was opened, first controllable silicon SCR 1, second controllable silicon SCR 2 provided big switching current and higher switching frequency as switch, can test the maximum operating frequency (dynamic characteristic) of electromagnet, still the scalable AC voltage regulator changes voltage simultaneously; And when K switch is closed, can tests and inhale moving and discharge static characteristic such as electrical quantity by regulating described AC voltage regulator T1 voltage.
The high level input terminal voltage of 555 timer U2 is then crossed the auxiliary direct current source circuit of being made up of transformer T3, rectifier bridge D5, three terminal regulator U1 and the second filter capacitor C2, the 3rd filter capacitor C3 and is obtained.When multivibrator sends the square wave triggering signal, the output of multivibrator is connected to the first optocoupler OPT1 and the second optocoupler OPT2 by the 3rd resistance R 3, the conducting and the blocking-up of first controllable silicon SCR 1 and second controllable silicon SCR 2 are controlled in conducting and blocking-up by optocoupler, thereby export powerful pulsating current.
At last; the output of silicon controlled rectifier filter circuit after the first filter capacitor C1 filtering respectively by with the first filter capacitor C1 two ends and the voltmeter that connects, the ammeter indication output voltage and the current values that are connected in series with the first filter capacitor C1, one end; and; serial connection protection the 3rd diode D3 provides low internal resistance high power DC output on the ammeter loop; at the voltmeter two ends and meet the 4th diode D4, can adapt to big electric current inductive load as fly-wheel diode.
The present embodiment circuit is not owing to use potentiometer, but adopt AC voltage regulator to adjust output voltage, therefore there is not the excess power loss, the circuit efficiency height, the instrument heating is little, but long time continuous working, and can guarantee big electric current, adjust output voltage under the low internal resistance condition continuously, the test voltage adjusting range is 0～30V, maximum output current is 5A, uses the reverse-blocking tetrode thyristor technology to realize that output from 0 to the switch control more than 30 times of the highest per second, can meet the test request to the operating frequency and the life-span ageing test of electromagnet simultaneously.
Claims (4)
1, a kind of pressure regulating on-off circuit includes
One transforming circuit (1) is realized the high-low pressure transformation conversion to the AC power of input;
One silicon controlled rectifier filter circuit (2) connects the output of described transforming circuit (1), and realizes rectification, filtering to the secondary alternating current after the above-mentioned transformation; And
One circuits for triggering (3) are used for controlling the conducting of described silicon controlled rectifier filter circuit (2) and closing;
Described transforming circuit (1) includes AC voltage regulator (T1) and the main circuit transformer (T2) that links to each other in turn, described circuits for triggering (3) include auxiliary direct current source circuit (31) and signal generator circuit (32), and the triggering and conducting end (21) of described silicon controlled rectifier filter circuit (2) links to each other with the signal output part (321) of described signal generator circuit (32);
It is characterized in that: described silicon controlled rectifier filter circuit comprises first controllable silicon (SCR1), second controllable silicon (SCR2), first optocoupler (OPT1), second optocoupler (OPT2), first diode (D1), second diode (D2), and first resistance (R1), second resistance (R2), first filter capacitor (C1);
Wherein, the anode one tunnel of described first diode (D1) links to each other with an output of described transforming circuit (1), another road links to each other with the anode of described first controllable silicon (SCR1), the negative electrode of first diode (D1) connects the collector output of described first optocoupler (OPT1) through first resistance, the emitter output of first optocoupler (OPT2) links to each other with the trigger end of first controllable silicon (SCR1), the input diode negative electrode of first optocoupler (OPT1) is connected with the input diode anode of second optocoupler (OPT2), the negative electrode of first controllable silicon (SCR1) is as the delivery outlet of whole silicon controlled rectifier filter circuit, and the signal output part (321) of the input diode anode of first optocoupler (OPT1) and (32) of described signal generator circuit links to each other;
The anode one tunnel of described second diode (D2) links to each other with another output of described transforming circuit (1), another road links to each other with the anode of described second controllable silicon (SCR2), the negative electrode of second diode (D2) connects the collector output of described second optocoupler (OPT2) through second resistance (R2), the emitter output of second optocoupler (OPT2) links to each other with the trigger end of second controllable silicon (SCR2), the input diode minus earth of second optocoupler (OPT2), the negative electrode of second controllable silicon (SCR2) are connected the back and are connected with an end of first filter capacitor (C1) with the negative electrode concurrent of first controllable silicon (SCR1).
2, pressure regulating on-off circuit according to claim 1, it is characterized in that: also include the 3rd diode (D3) and the 4th diode (D4), wherein, the anode of described the 3rd diode (D3) links to each other with an end of described first filter capacitor (C1), the negative electrode of the 3rd diode (D3) links to each other with the negative electrode of described the 4th diode (D4), and the anode of the 4th diode (D4) links to each other with the other end of first filter capacitor (C1).
3, pressure regulating on-off circuit according to claim 1, it is characterized in that: described auxiliary direct current source circuit includes transformer (T3), bridge rectifier (D5), second filter capacitor (C2), the 3rd filter capacitor (C3) and have input (Vin), the three terminal regulator (U1) of output (Vout) and earth terminal (GND), wherein, two inputs of described bridge rectifier (D5) link to each other respectively with the output of transformer (T3), first output (Out1) ground connection of bridge rectifier (D5), second output (Out2) a tunnel links to each other with the input (Vin) of described three terminal regulator, another road second filter capacitor (C2) ground connection, the output of three terminal regulator (Vout) is through the 3rd filter capacitor (C3) ground connection.
4, pressure regulating on-off circuit according to claim 3, it is characterized in that: described signal generator circuit is for being the multivibrator of core with 555 timers (U2), output (3u) serial connection the 3rd resistance (R3) back of this 555 timer (U2) links to each other as the signal output part (321) of this signal generator circuit (32) and the triggering and conducting end (21) of described silicon controlled rectifier filter circuit (2), and the low level reset terminal (4u) of this 555 timer (U2) links to each other as input of described this signal generator circuit (32) and the output (Vout) of described three terminal regulator (U1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710071038A CN100590956C (en) | 2007-08-28 | 2007-08-28 | Pressure regulating on-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710071038A CN100590956C (en) | 2007-08-28 | 2007-08-28 | Pressure regulating on-off circuit |
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| Publication Number | Publication Date |
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| CN101162873A CN101162873A (en) | 2008-04-16 |
| CN100590956C true CN100590956C (en) | 2010-02-17 |
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| CN200710071038A Expired - Fee Related CN100590956C (en) | 2007-08-28 | 2007-08-28 | Pressure regulating on-off circuit |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917440B (en) * | 2015-06-29 | 2018-04-13 | 郑长青 | The control circuit of series excitation type motor |
| CN105278408B (en) * | 2015-10-26 | 2017-07-25 | 重庆电子工程职业学院 | A kind of Multifunctional timer circuit controlled based on computer IC |
| CN106899200A (en) * | 2015-12-17 | 2017-06-27 | 上海昱章电气成套设备有限公司 | The supply unit of rod control system |
| CN105589047A (en) * | 2015-12-22 | 2016-05-18 | 易事特集团股份有限公司 | Power supply aging test circuit |
| CN110798083B (en) * | 2019-12-02 | 2020-12-25 | 中国美术学院 | 555 phase control soft start current limiting protection direct current stabilized power supply |
| CN110806778B (en) * | 2019-12-02 | 2020-09-18 | 中国美术学院 | Time base phase control direct current voltage stabilizing power supply |
| CN113595386B (en) * | 2021-07-02 | 2023-03-10 | 西安军陶科技有限公司 | Ideal diode circuit and power supply |
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