CN112271130A - Novel power supply for triple quadrupole mass spectrometer ion optical system - Google Patents
Novel power supply for triple quadrupole mass spectrometer ion optical system Download PDFInfo
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- CN112271130A CN112271130A CN202011165111.XA CN202011165111A CN112271130A CN 112271130 A CN112271130 A CN 112271130A CN 202011165111 A CN202011165111 A CN 202011165111A CN 112271130 A CN112271130 A CN 112271130A
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- circuit
- voltage
- power supply
- transformer
- mass spectrometer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/022—Circuit arrangements, e.g. for generating deviation currents or voltages ; Components associated with high voltage supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/06—Electron- or ion-optical arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
- H02M1/348—Passive dissipative snubbers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electron Tubes For Measurement (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses a novel power supply for an ion optical system of a triple quadrupole mass spectrometer, which comprises a PWM (pulse-width modulation) controller, a field-effect tube and a filter rectification circuit, wherein a direct current supply circuit is connected with the field-effect tube, the front end of the field-effect tube is connected with the PWM controller, the PWM controller is also connected with a preceding stage protection and control circuit of a switching power supply, and a transformer, a peak pulse absorption circuit and a voltage doubling rectification circuit are sequentially arranged between the field-effect tube and the filter rectification circuit. The invention introduces the filter rectification circuit at the later stage of the voltage doubling rectification circuit, so that the obtained direct current voltage is smoother, the voltage is boosted by a traditional single transformer, the boost circuit formed by mixing the transformer and the voltage doubling rectification circuit is improved, the inductive load of the transformer is reduced, and simultaneously, the spike pulse absorption circuit and the voltage doubling rectification circuit are introduced, so that the spike pulse of the finally generated direct current high voltage is greatly reduced.
Description
Technical Field
The invention relates to an ion optical system of triple quadrupole mass spectrometer, in particular to a novel power supply of an ion lens in a mass analyzer of triple quadrupole mass spectrometer.
Background
Triple quadrupole mass spectrometers, as conventional quantitative analyzers, are widely used in the fields of military reconnaissance, nuclear industry, police work, and environmental science due to their high sensitivity, fast analysis speed, low sample usage, etc. The mass analyzer of the triple quadrupole mass spectrometer applies direct-current voltage to ions to be detected, the voltage provides radial traction force for the ions to be detected, and ion clusters can smoothly enter an ion detector to detect the intensity of the ion clusters. When the ion cluster entering the quadrupole analyzer is positive ions, the ion lens power supply system applies negative voltage which can pull the positive ion cluster to move radially; when the ion cluster is negative, the ion lens power supply system applies a positive voltage that will pull the ion cluster radially in the mass analyzer.
The triple quadrupole mass analyzer contains the following positions: in the process of screening ion clusters, each quadrupole rod is different in task, and the electric field force required to be applied is correspondingly changed by the Q0 rod, the Q1 rod, the Q2 rod and the Q3 rod, so that the ion lens power supply system needs to provide different direct current voltages in the quadrupole mass analyzer besides positive and negative polarity switching, and the radial traction force required by ions to be detected is different at different positions of the mass analyzer, so that the direct current voltages applied by the lens power supply are also different.
The power supply mode adopted in the earlier stage of the project is that firstly, a switching power supply generates different high-voltage direct currents, then the high-voltage direct currents are used as bias voltages of a linear adjustable power supply, finally different direct-current voltages are generated through the linear adjustable power supply, and the direct-current voltages are finally loaded to different positions of a quadrupole rod analyzer to provide radial traction force for ion clusters to be detected.
In the switching power supply adopted in the prior art, a field effect tube RF510 is used as a switching device, small alternating-current voltage is generated at a drain electrode of the field effect tube by controlling the on-off of a grid electrode of the field effect tube, the small alternating-current voltage generated by the field effect tube with smaller amplitude is boosted to high-voltage direct current of 550V and 270V by adopting transformers with different voltage transformation ratios, then the high-voltage direct current is used as bias voltage of a linear adjustable power supply to supply power to the linear power supply, finally the linear adjustable power supply generates current voltages with different amplitudes, and the direct-current voltages are loaded to different positions of a mass analyzer to provide radial traction force for an ion cluster to be detected. The method needs a transformer to provide a high transformation ratio, the number of turns of winding of a secondary coil is increased correspondingly when the high transformation ratio is high, the transformer belongs to an inductive load in the whole loop, signal reflection caused by the inductive load is realized, reflected signals are spike pulses, unnecessary spike pulses are superposed on 550V high-voltage direct current and 270V high-voltage direct current, and the direct current high voltage with the spike pulses is used as direct current bias of a next-stage linear adjustable power supply to finally influence the power supply quality of the ion lens.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a novel power supply for an ion optical system of a triple quadrupole mass spectrometer, which overcomes inductive load reflection caused by a switching power supply and eliminates spike pulse caused by an inductive load.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a novel power for triple quadrupole mass spectrometer ion optical system, includes PWM controller, field effect transistor, filter rectifier circuit, and direct current supply circuit links to each other with the field effect transistor, and the field effect transistor front end links to each other with the PWM controller, and the PWM controller still links to each other with switching power supply preceding stage protection and control circuit, is equipped with transformer, spike absorption circuit and voltage doubling rectifier circuit between field effect transistor and the filter rectifier circuit in proper order.
The key point of the invention is to reduce the peak pulse loaded to the direct current voltage, the root cause for generating the peak pulse is the reflection brought by the inductive load, and the winding type transformer in the circuit is the maximum inductive load; and secondly, introducing a spike pulse absorption circuit at the later stage of the secondary coil of the transformer, wherein the spike pulse absorption circuit comprises an inductance coil, a first diode connected with the inductance coil, a resistor, a capacitor and a second diode which are connected in parallel, and the inductance coil is arranged between the capacitor and the second diode.
When the fet IRL510 is turned off, the energy stored in the transformer due to leakage flux and excitation is discharged through the capacitor via the diode D1, and the voltage of the absorption capacitor C1 is reversed, whereby the transformer is demagnetized by the voltage of the capacitor C1.
Furthermore, the voltage doubling rectifying circuit is added at the rear stage of the absorption circuit, so that alternating voltage with smaller amplitude generated by the transformer generates required high-voltage direct current through the voltage doubling rectifying circuit, and the voltage doubling rectifying circuit is introduced to reduce the number of turns of the secondary winding of the transformer, thereby reducing inductive load in the circuit and finally reducing the spike pulse influence caused by the inductive load.
Further, according to the required voltage value, the voltage doubling multiple can be selected, namely the number of the diodes and the capacitors is selected, and the diodes adopted by the invention are reverse voltage-withstanding and fast-recovery Schottky diodes R2000F.
The invention introduces the filter rectification circuit at the later stage of the voltage doubling rectification circuit, so that the obtained direct current voltage is smoother, the voltage is boosted by a traditional single transformer, the boost circuit formed by mixing the transformer and the voltage doubling rectification circuit is improved, the inductive load of the transformer is reduced, and simultaneously, the spike pulse absorption circuit and the voltage doubling rectification circuit are introduced, so that the spike pulse of the finally generated direct current high voltage is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a novel power supply for an ion optical system of a triple quadrupole mass spectrometer, which is provided by the implementation of the invention;
fig. 2 is a circuit diagram of a spike pulse absorption circuit in a novel power supply for an ion optical system of a triple quadrupole mass spectrometer according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a voltage-doubling rectifying circuit in a novel power supply for an ion optical system of a triple quadrupole mass spectrometer, which is provided by the implementation of the invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
As shown in figure 1, the novel power supply for the triple quadrupole mass spectrometer ion optical system comprises a PWM controller, a field effect tube and a filter rectification circuit, wherein a direct current supply circuit is connected with the field effect tube, the front end of the field effect tube is connected with the PWM controller, the PWM controller is also connected with a switch power supply preceding stage protection and control circuit, and a transformer, a peak pulse absorption circuit and a voltage doubling rectification circuit are sequentially arranged between the field effect tube and the filter rectification circuit.
The key point of the invention is to reduce the peak pulse loaded to the direct current voltage, the root cause for generating the peak pulse is the reflection brought by the inductive load, and the winding type transformer in the circuit is the maximum inductive load; secondly, a spike pulse absorption circuit is introduced at the later stage of the secondary coil of the transformer, as shown in fig. 2, the spike pulse absorption circuit comprises an inductance coil, a first diode connected with the inductance coil, a resistor, a capacitor and a second diode which are connected in parallel, and the inductance coil is arranged between the capacitor and the second diode.
When the fet IRL510 is turned off, the energy stored in the transformer due to leakage flux and excitation is discharged through the capacitor via the diode D1, and the voltage of the absorption capacitor C1 is reversed, whereby the transformer is demagnetized by the voltage of the capacitor C1. The LCR absorption circuit used does not consume energy generally.
The voltage doubling rectifying circuit shown in figure 3 is added at the rear stage of the absorption circuit, so that alternating current voltage with smaller amplitude value generated by the transformer generates required high-voltage direct current through the voltage doubling rectifying circuit, and the voltage doubling rectifying circuit is introduced to reduce the number of turns of the secondary winding of the transformer, thereby reducing inductive load in the circuit and finally reducing the spike pulse influence caused by the inductive load.
Further, according to the required voltage value, the voltage doubling multiple can be selected, namely the number of the diodes and the capacitors is selected, and the diodes adopted by the invention are reverse voltage-withstanding and fast-recovery Schottky diodes R2000F.
The above examples are merely for illustrative clarity and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (6)
1. The utility model provides a novel power for triple quadrupole mass spectrometer ion optical system which characterized in that, includes PWM controller, field effect transistor, filter rectifier circuit, and direct current supply circuit links to each other with the field effect transistor, and the field effect transistor front end links to each other with the PWM controller, and the PWM controller still links to each other with switching power supply preceding stage protection and control circuit, is equipped with transformer, spike absorption circuit and voltage doubling rectifier circuit between field effect transistor and the filter rectifier circuit in proper order.
2. The novel power supply for a triple quadrupole mass spectrometer ion optical system of claim 1, wherein the spike absorption circuit comprises an inductor, a first diode connected to the inductor, a resistor connected in parallel, a capacitor, and a second diode, the inductor being disposed between the capacitor and the second diode.
3. The novel power supply for an ion optical system of a triple quadrupole mass spectrometer as claimed in claim 2, wherein if the fet is turned off, the energy accumulated in the transformer and the leakage flux and excitation are discharged through the capacitor via the first diode, reversing the voltage of the absorption capacitor, and thereby demagnetizing the transformer from the voltage of the capacitor.
4. The novel power supply for the triple quadrupole mass spectrometer ion optical system according to claim 1, wherein a voltage doubling rectifier circuit is added at the post stage of the spike pulse absorption circuit, so that an alternating voltage with a smaller amplitude generated by the transformer is generated by the voltage doubling rectifier circuit, and the voltage doubling rectifier circuit is introduced to reduce the number of turns of a secondary winding of the transformer, thereby reducing inductive load in the circuit and finally reducing spike pulse influence caused by the inductive load.
5. The novel power supply for the triple quadrupole mass spectrometer ion optical system according to claim 1, wherein the voltage doubling rectifying circuit can select the voltage doubling times, namely the number of diodes and capacitors according to the required voltage value.
6. The novel power supply for triple quadrupole mass spectrometer ion optical systems according to claim 5, wherein the diode is a reverse withstand voltage high and fast recovery schottky diode R2000F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011165111.XA CN112271130A (en) | 2020-10-27 | 2020-10-27 | Novel power supply for triple quadrupole mass spectrometer ion optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011165111.XA CN112271130A (en) | 2020-10-27 | 2020-10-27 | Novel power supply for triple quadrupole mass spectrometer ion optical system |
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| Publication Number | Publication Date |
|---|---|
| CN112271130A true CN112271130A (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011165111.XA Pending CN112271130A (en) | 2020-10-27 | 2020-10-27 | Novel power supply for triple quadrupole mass spectrometer ion optical system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204334331U (en) * | 2014-09-24 | 2015-05-13 | 帝发技术(无锡)有限公司 | The fans drive power supply of vehicle-mounted heater |
| CN206283424U (en) * | 2016-09-12 | 2017-06-27 | 哈尔滨理工大学 | A kind of Novel DC voltage source |
| CN106972766A (en) * | 2017-04-20 | 2017-07-21 | 深圳市助尔达电子科技有限公司 | A kind of power circuit |
| WO2019134123A1 (en) * | 2018-01-05 | 2019-07-11 | 孟加顷 | Switch power supply circuit |
-
2020
- 2020-10-27 CN CN202011165111.XA patent/CN112271130A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204334331U (en) * | 2014-09-24 | 2015-05-13 | 帝发技术(无锡)有限公司 | The fans drive power supply of vehicle-mounted heater |
| CN206283424U (en) * | 2016-09-12 | 2017-06-27 | 哈尔滨理工大学 | A kind of Novel DC voltage source |
| CN106972766A (en) * | 2017-04-20 | 2017-07-21 | 深圳市助尔达电子科技有限公司 | A kind of power circuit |
| WO2019134123A1 (en) * | 2018-01-05 | 2019-07-11 | 孟加顷 | Switch power supply circuit |
Non-Patent Citations (1)
| Title |
|---|
| 马跃，邓玉福，于桂英: "小型高压开关电源设计", 沈阳师范大学学报（自然科学版）, vol. 29, no. 1, pages 1 - 4 * |
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