CN201041572Y - High voltage generator - Google Patents
High voltage generator Download PDFInfo
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- CN201041572Y CN201041572Y CNU2007201203530U CN200720120353U CN201041572Y CN 201041572 Y CN201041572 Y CN 201041572Y CN U2007201203530 U CNU2007201203530 U CN U2007201203530U CN 200720120353 U CN200720120353 U CN 200720120353U CN 201041572 Y CN201041572 Y CN 201041572Y
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- pressure generator
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Abstract
The utility model relates to a high voltage generator, and comprises a boost circuit, a rectification filter circuit, an oscillator circuit, a differentiating circuit, a pulse shaping circuit, a switching circuit and a feedback control circuit, wherein the boost circuit boosts and converts the electric energy output by a direct current power supply and then outputs the electric energy; the rectification filter circuit outputs the electric energy output by the boost circuit after the rectification and filtration; the oscillator circuit generates oscillatory waves; the differentiating circuit divides the oscillatory waves into spike pulse waves; the pulse shaping circuit leads the spike pulse waves to be shaped into rectangular pulse waves; the switching circuit is turned on and cut off under the control of the rectangular pulse waves, to control the electrical energy conversion inside the boost circuit; and the feedback control circuit controls the time constant of the differentiating circuit according to the output of the rectification filter circuit. By using the utility model, not only stable output voltage can be obtained, and the cost also can be reduced because the electric circuit is simple.
Description
Technical field
The utility model relates to a kind of high pressure generator, particularly the high pressure generator of megohmmeter.
Background technology
Megohmmeter is the key instrument of measurement insulation resistance in the electrotechnical measurement.Have high pressure generator in the megohmmeter, in order to produce the high-tension measurement insulation resistance.At present, the high pressure generator that is used for megohmmeter is of a great variety, but the circuit complexity that has, the simple but output high pressure instability of the circuit that has, and precision is low, and load capacity is poor, has influenced the measurement level of megohmmeter greatly.
Novel content
The purpose of this utility model is to provide a kind of high pressure generator, and this high-voltage generator circuit is simple and the output high pressure is stable.
The high pressure generator that is provided comprises that a booster circuit is connected to a direct current power supply, in order to export after the electric energy boost conversion with direct supply output; One current rectifying and wave filtering circuit is exported after booster circuit is exported the electric energy rectifying and wave-filtering; One oscillating circuit is in order to produce Sasser; One differentiating circuit is in order to being the spike pulse ripple with described Sasser differential; One pulse shaping circuit, in order to described spike pulse ripple is shaped as rectangular wave pulse, an on-off circuit,, thereby in order to conducting under the control of described rectangular wave pulse and electric energy conversion by control booster circuit inside; And a feedback control circuit, in order to control the time constant of described differentiating circuit according to the output of described current rectifying and wave filtering circuit.Wherein, when the output voltage of described high pressure generator is higher than a predetermined value, feedback control circuit changes the time constant of described differentiating circuit, the spike pulse wave-wave deformation of differentiating circuit output is narrow, the rectangular wave pulse of pulse shaping circuit output also narrows down thereupon, the time of the each conducting of on-off circuit is shortened, cause the output after the booster circuit boost conversion to reduce, thereby the output voltage of described high pressure generator is reduced; When the output voltage of described high pressure generator is lower than described predetermined value, feedback control circuit makes the spike pulse wave-wave deformation of described differentiating circuit output wide, the rectangular wave pulse waveform of pulse shaping circuit output also broadens thereupon, make the time of the each conducting of on-off circuit elongated, cause the output after the booster circuit boost conversion to raise, thereby the output voltage of described high pressure generator is raise.
Described differentiating circuit is made of an electric capacity and a triode, and described transistor base is controlled by feedback control circuit.
Described feedback control circuit comprises a bleeder circuit and an operational amplifier, described bleeder circuit is made of the two or more divider resistances that are connected between rectification filter circuit output end and the earth potential, described operational amplifier according in the bleeder circuit between the divider resistance pressure reduction between a node and the predetermined voltage export the time constant of a Control of Voltage differentiating circuit.
Described bleeder circuit also comprises one or more selector switch, when being depressed, described selector switch changes bleeder circuit, the above node voltage of bleeder circuit is changed, and described node voltage change causes the output voltage of described high pressure generator to be changed to another predetermined value from described predetermined value.
Compared with prior art, the not only circuit that the utility model provides is simple, and the high pressure output speed is fast, and voltage conversion range is wide, and output voltage stabilization, and load capacity is strong.
Description of drawings
Fig. 1 is the structured flowchart of the utility model high pressure generator one embodiment.
Fig. 2 is the physical circuit figure of high pressure generator shown in Figure 1.
Embodiment
Consult shown in Figure 1ly, be the structured flowchart of the utility model high pressure generator one embodiment.One direct current power supply 10 is depressed at starting switch 20, starts output electric energy to a booster circuit 30 behind the high pressure generator, rise to certain voltage by booster circuit 30 after, behind a current rectifying and wave filtering circuit, export.Wherein, described starting switch 20 can be the starting switch of high pressure generator place megohmmeter.
Described high pressure generator comprises that an oscillating circuit 50 is used to produce Sasser, between described oscillating circuit 50 input ends connection and starting switch 20 and the booster circuit 30, output terminal connects a differentiating circuit 60, and the Sasser of described oscillating circuit 50 outputs produces the spike pulse ripple behind differentiating circuit 60 differential.Described spike pulse ripple exports a pulse shaping circuit 70 to by differentiating circuit 60, the conducting that is shaped as control one on-off circuit 80 behind the rectangular wave pulse by described pulse shaping circuit 70 with end.Wherein, described on-off circuit 80 is connected between booster circuit 30 and the earth potential, via flowing of its conducting and electric current in control booster circuit 30, produces voltage transitions.
Described differentiating circuit 60 is subjected to the control of a feedback control circuit 90, described feedback control circuit 90 is according to the time constant parameter of the output situation control differentiating circuit 60 of high pressure generator, thereby change the waveform of differentiating circuit 60 output spike pulse ripples, cause the width of pulse shaping circuit 70 output rectangular wave pulses to change, the change of rect.p. wave width causes the on-off circuit 80 conducting closing time of variations at interval, finally causes the variation of booster circuit 30 voltage transitions.
Consult shown in Figure 2ly, be the physical circuit figure of high pressure generator shown in Figure 1.Among Fig. 2, described starting switch 20 is a start button switch S 1, and described start button switch S 1 places on the path of direct supply 10 positive best booster circuits 30.Described booster circuit 30 comprises a step-up transformer T1, and described step-up transformer T1 comprises a former limit and a secondary.The former limit of described step-up transformer T1 connects on-off circuit 80.Among Fig. 2, described on-off circuit 80 is a MOS transistor Q2, and described MOS transistor Q2 is according to the rectangular wave pulse conducting of pulse shaping circuit 70 output being connected by the former limit of step-up transformer T1 and earth potential.Described pulse shaping circuit 70 is made up of the reverser N3 and the N4 of two series connection.Described reverser N3 input termination differentiating circuit 60.Described differentiating circuit 60 is made up of a capacitor C 2 and a triode Q1, and described triode Q1 base stage connects feedback control circuit 90, and collector connects input end, emitter and the direct supply 10 negative pole common grounds of capacitor C 2 and reverser N3 simultaneously.Described capacitor C 2 places between triode Q1 and the oscillating circuit 50.Described oscillating circuit 50 is made up of a resistance R 1, a capacitor C 1 and two reverser N1 and N2.Described resistance R 1 be parallel to the circuit that direct supply 10 and start button switch S 1 be composed in series after a stabilivolt DW connects on.Described two reverser N1 and N2 form the two ends that a positive-feedback circuit is connected in capacitor C 1.
The secondary of described step-up transformer T1 connects current rectifying and wave filtering circuit 40, and among Fig. 2, described current rectifying and wave filtering circuit 40 is made up of bridge rectifier circuit and filter capacitor C5.Described current rectifying and wave filtering circuit 40 is exported step-up transformer T1 is converted to the electric energy rectifying and wave-filtering of secondary from former limit after.
Described feedback control circuit 90 is made up of a bleeder circuit, an operational amplifier U1 and a generating circuit from reference voltage.Described bleeder circuit is connected between current rectifying and wave filtering circuit 40 output terminals and the earth potential and is constituted by the individual resistance string of N (N is the natural number more than or equal to 2).For sake of convenience, with this N resistance by its distance from current rectifying and wave filtering circuit 40 output terminals be designated respectively first divider resistance, second divider resistance ..., the N divider resistance, wherein from current rectifying and wave filtering circuit 40 output terminals nearest be first divider resistance, farthest be the N divider resistance.A described N divider resistance, when N greater than 2 the time, as required, can (N-2) individual divider resistance therebetween on by the individual selector switch of stepped parallel connection (N-2).Described stepped, be one first selector switch in parallel on second divider resistance, one second selector switch in parallel on second divider resistance and the 3rd divider resistance, the rest may be inferred, second divider resistance, the 3rd divider resistance ..., with (N-1) divider resistance on (N-2) in parallel selector switch.As shown in Figure 2, described bleeder circuit is made of four divider resistance R6, R7, R8 and R9 being serially connected with between current rectifying and wave filtering circuit 40 output terminals and the earth potential.By the distance of these four divider resistances, be designated the first divider resistance R6, the second divider resistance R7, the 3rd divider resistance R8 and the 4th divider resistance R9 respectively from current rectifying and wave filtering circuit 40 output terminal distances.On the second divider resistance R7, be parallel with selector switch S3, on the second divider resistance R7, the 3rd divider resistance R8, be parallel with selector switch S2.When selecting switch S 3 to be depressed, selected switch S 3 bypasses of the second divider resistance R7, bleeder circuit essence this moment is made up of the first divider resistance R6, the 3rd divider resistance R8 and the 4th divider resistance R9.When selecting switch S 2 to be depressed, selected switch S 2 bypasses of the second and the 3rd divider resistance R7, R8, bleeder circuit essence at this moment is made up of the first divider resistance R6 and the 4th divider resistance S9.
Operational amplifier U1 positive input is connected to first divider resistance and the second divider resistance junction in the bleeder circuit, and reverse input end is connected to generating circuit from reference voltage.Described generating circuit from reference voltage is made of stabilivolt DW and two resistance R 4, R5.Circuit one end that resistance R 4, R5 are composed in series is connected in stabilivolt DW and resistance R 1 junction, other end ground connection.Resistance R 4 and R5 junction connect the reverse input end of operational amplifier U1, for operational amplifier U1 provides a reference voltage.
Operational amplifier U1 exports the base stage of a voltage to the triode Q1 of differentiating circuit 60 according to the pressure reduction of its positive input and reverse input end.The voltage of described operational amplifier U1 output impels triode Q1 conducting, and this moment, triode Q1 was equivalent to a variable resistor.Under following two kinds of situations, the change in voltage of operational amplifier U1 output influences the conducting degree of triode Q1, is equivalent to change variable-resistance resistance, thereby influences the output U0 of high pressure generator.
First kind of situation has different selector switch to be depressed in bleeder circuit, when constituting the divider resistance change of bleeder circuit, and second kind of situation, the divider resistance that constitutes bleeder circuit does not change, but high-tension transformer output voltage U 0 changes.Above-mentioned two kinds of situations all can cause operational amplifier U1 positive input input voltage to change, because the reference voltage of operational amplifier U1 reverse input end input can not change, the voltage of operational amplifier U1 output can change along with the change of its positive input input voltage, the variation of operational amplifier U1 output voltage changes the conducting degree of triode Q1, is equivalent to change variable resistor earth resistance value.Therefore the time constant parameter change of differentiating circuit 60 influences the waveform of the spike pulse ripple of its output.As previously mentioned, the change of spike pulse wave-wave shape causes the width of pulse shaping circuit 70 output rectangular wave pulses, the change of rect.p. wave width influences on-off circuit 80 conductings and the time span of ending, and therefore influence the degree of booster circuit 30 converting electrical energies, thereby influence the voltage U 0 of high pressure generator output.In above-mentioned first kind of situation, thereby feedback control circuit 90 is via the output voltage U 0 of the time constant change high pressure generator that changes differentiating circuit 60, as output voltage U 0 is switched to another predetermined value (as 1000V) from a predetermined value (as 500V).In above-mentioned second kind of situation, change in high pressure generator output voltage U 0, when promptly departing from a certain predetermined value, feedback control circuit 90 is via the output voltage U 0 of the time constant stable high voltage generator that changes differentiating circuit 60.
Claims (6)
1. a high pressure generator is characterized in that, comprising:
One booster circuit is connected to a direct current power supply, in order to export after the electric energy boost conversion with direct supply output;
One current rectifying and wave filtering circuit is in order to export booster circuit the output voltage that produces described high pressure generator behind the electric energy rectifying and wave-filtering;
One oscillating circuit is in order to produce Sasser;
One differentiating circuit is in order to being the spike pulse ripple with described Sasser differential;
One pulse shaping circuit is in order to be shaped as rectangular wave pulse with described spike pulse ripple;
One on-off circuit, thereby in order to conducting under the control of described rectangular wave pulse and the electric energy conversion that ends control booster circuit inside; And
One feedback control circuit, in order to controlling the time constant of described differentiating circuit according to described output voltage,
Wherein, when the output voltage of described high pressure generator is higher than a predetermined value, feedback control circuit changes the time constant of described differentiating circuit, the spike pulse wave-wave deformation of differentiating circuit output is narrow, the rectangular wave pulse of pulse shaping circuit output also narrows down thereupon, the time of the each conducting of on-off circuit is shortened, cause the output after the booster circuit boost conversion to reduce, thereby the output voltage of described high pressure generator is reduced; When the output voltage of described high pressure generator is lower than described predetermined value, feedback control circuit makes the spike pulse wave-wave deformation of described differentiating circuit output wide, the rectangular wave pulse waveform of pulse shaping circuit output also broadens thereupon, make the time of the each conducting of on-off circuit elongated, cause the output after the booster circuit boost conversion to raise, thereby the output voltage of described high pressure generator is raise.
2. high pressure generator as claimed in claim 1 is characterized in that described booster circuit comprises a step-up transformer.
3. high pressure generator as claimed in claim 1 is characterized in that, described differentiating circuit is made of an electric capacity and a triode, and described transistor base is controlled by feedback control circuit.
4. high pressure generator as claimed in claim 1, it is characterized in that, described feedback control circuit comprises a bleeder circuit and an operational amplifier, described bleeder circuit is made of the two or more divider resistances that are connected between rectification filter circuit output end and the earth potential, described operational amplifier according in the bleeder circuit between the divider resistance pressure reduction between a node and the predetermined voltage export the time constant of a Control of Voltage differentiating circuit.
5. high pressure generator as claimed in claim 4, it is characterized in that, described bleeder circuit also comprises one or more selector switch, when being depressed, described selector switch changes bleeder circuit, the above node voltage of bleeder circuit is changed, and described node voltage change causes the output voltage of described high pressure generator to be changed to another predetermined value from described predetermined value.
6. high pressure generator as claimed in claim 1 is characterized in that, described pulse shaping circuit is made up of the reverser of two series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201203530U CN201041572Y (en) | 2007-05-25 | 2007-05-25 | High voltage generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201203530U CN201041572Y (en) | 2007-05-25 | 2007-05-25 | High voltage generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041572Y true CN201041572Y (en) | 2008-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201203530U Expired - Fee Related CN201041572Y (en) | 2007-05-25 | 2007-05-25 | High voltage generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041572Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957391A (en) * | 2010-09-26 | 2011-01-26 | 厦门出入境检验检疫局检验检疫技术中心 | Self-stabilizing conducting comb signal source |
| CN102223089A (en) * | 2011-06-29 | 2011-10-19 | 中国科学院空间科学与应用研究中心 | Large-scope linearly-adjusted high-precision high voltage circuit |
| CN104407185A (en) * | 2014-12-08 | 2015-03-11 | 赵伊苓 | Electric oscillating wave generator |
| CN108983102A (en) * | 2018-06-20 | 2018-12-11 | 北京海博思创科技有限公司 | A kind of BMS high voltage functionality test fixture |
-
2007
- 2007-05-25 CN CNU2007201203530U patent/CN201041572Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957391A (en) * | 2010-09-26 | 2011-01-26 | 厦门出入境检验检疫局检验检疫技术中心 | Self-stabilizing conducting comb signal source |
| CN101957391B (en) * | 2010-09-26 | 2012-07-18 | 厦门出入境检验检疫局检验检疫技术中心 | Self-stabilizing conducting comb signal source |
| CN102223089A (en) * | 2011-06-29 | 2011-10-19 | 中国科学院空间科学与应用研究中心 | Large-scope linearly-adjusted high-precision high voltage circuit |
| CN102223089B (en) * | 2011-06-29 | 2013-07-24 | 中国科学院空间科学与应用研究中心 | Large-scope linearly-adjusted high-precision high voltage circuit |
| CN104407185A (en) * | 2014-12-08 | 2015-03-11 | 赵伊苓 | Electric oscillating wave generator |
| CN108983102A (en) * | 2018-06-20 | 2018-12-11 | 北京海博思创科技有限公司 | A kind of BMS high voltage functionality test fixture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080326 Termination date: 20110525 |