CN1464626A - High-power high-voltage D. C. electrostatic electric power unit - Google Patents
High-power high-voltage D. C. electrostatic electric power unit Download PDFInfo
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- CN1464626A CN1464626A CN 02121413 CN02121413A CN1464626A CN 1464626 A CN1464626 A CN 1464626A CN 02121413 CN02121413 CN 02121413 CN 02121413 A CN02121413 A CN 02121413A CN 1464626 A CN1464626 A CN 1464626A
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Abstract
The invention relates to a power supply unit, in particular a high power high voltage direct current static electric power supply unit which can serve as the power source for dust collection, spraying and X-ray static electricity. The invention provides an intelligent control power supply unit possessing the advantages of small volume, high frequency, large power, high efficiency and reliability. By integrating inversion driver, inverter and booster transformer, the unit realizes the automatic control by microprocessor for stable high voltage direct current power supply, enabling the power source to keep operating on the optimum working point.
Description
Technical Field
The invention relates to a power supply device, in particular to a high-power high-voltage direct-current electrostatic power supply device which can be used as a dust removal, spraying and X-ray electrostatic power supply.
Background
The core technology of the existing high-voltage electrostatic power supply device is mainly a transistor oscillation circuit and a voltage doubling rectifying circuit to obtain direct-current high-voltage electricity. The transistor oscillating circuit converts direct current supplied by the previous circuit into high-frequency alternating current, the high-frequency alternating current is boosted by the capacitor voltage-multiplying circuit and rectified to output direct current high-voltage electricity. This technique has a drawback in that the frequency of the high-frequency alternating current generated by the transistor oscillation circuit is low; although the capacitor voltage doubling circuit is easy to boost, the output current is small, the power is low, and therefore, a power supply adopting the technology is large in size, low in efficiency and high in power consumption, and does not meet the energy-saving requirement of the modern society.
In the prior art, an inverter is also used to convert dc power into high-frequency ac power. The inverter generally adopts a high-frequency low-power switching transistor, and the boosting efficiency is improved by improving the alternating current frequency; or a high-power switching tube (such as silicon controlled rectifier) is adopted to improve the output power of alternating current, so that the boosting efficiency is improved. Both solutions have their drawbacks: the first scheme is high in frequency, but low in power, and therefore is not efficient; the second solution is powerful, but the frequency can only reach the intermediate frequency, about 10KHZ, and therefore the efficiency is low. It follows that the above techniques are not really effective in improving the conversion efficiency.
Disclosure of Invention
The invention mainly aims to overcome the defects and provide a high-power high-voltage direct-current electrostatic power supply device which is small in size, high in frequency, high in power and high in efficiency.
The invention also aims to provide a high-power high-voltage direct-current electrostatic power supply device which is high in reliability and can be intelligently controlled.
In order to achieve the purpose, the invention adopts the following technical measures:
firstly, the function of converting direct current into high-frequency alternating current is realized by combining an inverter driver and an inverter, so that the high-frequency alternating current output by the inverter has high frequency and high power.
And secondly, the step-up transformer with a special design on the structure is adopted, so that the high-frequency alternating voltage is effectively increased, and larger power can be obtained, thereby ensuring the output efficiency of the invention.
And thirdly, adopting the design of combining the microprocessor and each protection circuit. The microprocessor receives the sampling signals of the protection circuits
The software judges the signal value, outputs corresponding signals according to the judgment result, and controls the operation of partial circuits so as to meet the intelligent requirement.
The design of the invention is as follows:
the utility model provides a high-power high voltage direct current electrostatic power supply device, includes power supply circuit, pressure regulating rectifier circuit, rectification output circuit and overcurrent protection circuit, its characterized in that:
the system also comprises an inversion driver, an inverter and a boosting transformer;
the power circuit supplies power to the whole circuit through an isolation transformer;
the voltage regulating rectification circuit receives alternating current transmitted by the power supply circuit and outputs stable direct current to the inverter;
the inverter driver generates double-drive square waves to drive a power transistor (IGBT) of the inverter;
the inverter converts the direct current sent by the voltage regulating rectification circuit into high-frequency alternating current for boosting by the booster transformer;
the step-up transformer steps up the high-frequency alternating current output by the inverter and outputs high-voltage direct current through the rectification output circuit;
an overcurrent protection circuit collects a current signal of the inverter and sends the current signal to the inverter driver, the inverter driver detects the current, and if the current is larger than a preset value, the inverter driver stops outputting a pulse signal.
The invention is further characterized in that:
the device also comprises a microprocessor and an overvoltage and overcurrent protection circuit;
the overvoltage and overcurrent protection circuit collects voltage and current signals of the voltage regulating and rectifying circuit and sends the voltage and current signals to the microprocessor, the microprocessor judges whether the voltage and the current are higher than preset values, if so, the microprocessor outputs control signals and cuts off the output of the power circuit;
the step-up transformer outputs a current signal to the microprocessor through an overcurrent protection circuit, and if the microprocessor judges that the current is higher than a preset value, the step-up transformer outputs a control signal to cut off the output of the power circuit;
the microprocessor detects the pulse signal output by the inverter driver, and if the inverter driver has no signal output, the microprocessor outputs a control signal to cut off the output of the power circuit;
and the microprocessor samples and judges the high-voltage direct-current voltage output by the rectifying circuit, and if the voltage value is within a preset range, the microprocessor outputs a control signal and the voltage-regulating rectifying circuit stops working.
The invention has the following advantages:
1. the inverter driver, the inverter and the step-up transformer are organically combined in the device, so that a stable high-voltage direct-current power supply automatically controlled by a microcomputer is realized, and the power supply can be always kept at an optimal working point. When the power supply is used for the dust removal device, high dust removal efficiency can be obtained.
2. The inverter is used in the device to output standard high-frequency alternating voltage, so that the power supply has stable work, low power consumption and high efficiency, and has larger power output compared with the similar power supply.
3. The inverter driver module is adopted in the device to drive the IGBT in the inverter, so that the blank that the domestic high-frequency high-power inverter circuit cannot realize the high-frequency high-power inverter circuit is solved.
4. The device designs a direct boosting method of a high-power high-voltage transformer. The primary coils of the three transformers are connected in parallel, and the secondary coils are respectively rectified and then connected in series, so that the purpose of realizing high voltage and high power is achieved, and a new field of high voltage boosting in China is developed. The direct boosting method of the high-frequency transformer is adopted, so that the boosting elements are few, the structure is simple, the boosting level by utilizing the voltage multiplication of the capacitor is exceeded, the most important point is that the problems of the distributed capacitor Cs and the leakage inductance Ls are effectively solved, the output of high-voltage current is improved, and the volume of the direct boosting method of the high-frequency transformer is dozens of times smaller than that of a power-frequency booster and is several times smaller than that of a voltage multiplication booster with the same power.
5. The device adopts modular drive, so that the circuit is very simple, the reliability is high, the production is easy, the development of the electric power industry in China is facilitated, and the economic benefit and the social benefit are increased.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a block diagram of the present invention for implementing high voltage and control processes;
FIG. 2 is a schematic diagram of the inverter drive and inverter of the present invention;
FIG. 3 is a wiring diagram of the step-up transformer of the present invention;
fig. 4 is a circuit schematic of the present invention.
Detailed Description
Referring to fig. 1, the power supply apparatus supplies power to the full circuit through an isolation transformer. The over-voltage and over-voltage protection circuit sends voltage and current signals to the microprocessor to realize over-current and over-voltage protection. The voltage regulating and rectifying circuit is controlled by the microprocessor to regulate voltage, namely the microprocessor receives voltage and current sampling signals transmitted by the overvoltage and overcurrent protection circuit, compares the voltage and current sampling signals with a preset value, and if the voltage and current sampling signals are larger than the preset value, the microprocessor cuts off the output of the power circuit to ensure the safety of the circuit; the microprocessor also samples and judges the output value of the rectification output circuit, and if the voltage value is within a preset range, the microprocessor outputs a control signal and the voltage regulating rectification circuit stops working. The voltage regulating rectification circuit outputs stable direct current to the inverter. The inverter driver generates double-drive square waves to drive the IGBT of the inverter. The inverter converts the direct current sent by the voltage regulating rectification circuit into high-frequency alternating current for the boosting transformer to boost. Meanwhile, the inverter driver detects the current of the inverter, and stops outputting square waves if the current is too large; the microprocessor detects the output signal of the inverter driver, and if the inverter driver has no output, the microprocessor controls to cut off the power supply circuit, so that the device is restarted after being stopped. The primary side of the booster transformer boosts the high-frequency alternating current output by the inverter and outputs high-voltage direct current through the rectification output circuit. Meanwhile, the step-up transformer outputs a current signal to the microprocessor through the overcurrent protection circuit to provide load overcurrent protection.
Referring to fig. 2, the inverter driver includes eight unit circuits, including two schmitt triggers, two and gates, two isolation links, two level matchers, two power drivers, two overcurrent detection comparators, a power supply voltage monitor, and an error monitor network. After an input signal enters a driver through P8 and P12, a pulse is shaped by a Schmitt trigger, the shaped pulse enters the primary side of an isolation transformer through an AND gate, a driving signal which is in the same phase with the input pulse is obtained at the secondary side of the isolation transformer, and the driving signal is output through S8 and S14, so that an IGBT conducts a midpoint lead of a bridge arm of an inverter, the IGBT is connected with the midpoint of a half-bridge capacitor of the inverter through the primary side of a boosting transformer, direct current is inverted into alternating current, and the alternating current is boosted by the boosting.
The inverter adopts a novel high-power transistor IGBT; the inverter is composed of input resistors R19, R20, R22 and R23; input protection resistors R25, R26; bidirectional stabilivolt D4-D7; a novel power switch tube IGBT; half-bridge capacitors C9, C10; freewheeling diodes D8 and D9; voltage-stabilizing tubes D4, D5, D6 and D7 are reversely connected in series, then are connected in parallel with resistors R25 and R26 and are connected to an IGBT trigger electrode; the emitter and collector of the double IGBT are respectively connected in series through D8 and D9, and the bridge arm midpoint outgoing line is connected with the midpoint outgoing lines of the half-bridge capacitors C9 and C10 which are connected in series through a step-up transformer to form a half-bridge inverter. The step-up transformer in the figure is a schematic diagram, and the specific structure is shown in figure 3.
Referring to fig. 3, the step-up transformer includes three transformers, primary coils of the transformers are connected in parallel, and secondary coils of the transformers are respectively rectified and then connected in series to output high-voltage direct current.
Referring to fig. 4, wherein the specific circuit of the inverter driver is shown in fig. 2, and the specific circuit of the step-up transformer is shown in fig. 3. The voltage regulating and rectifying circuit adopts a voltage regulator, and the overcurrent protection circuit, the overvoltage and overcurrent protection circuit and the pulse generator are all known circuits and have no special requirements in the invention. The microprocessor adopts a 8031 single chip microcomputer, and the connection relation between the single chip microcomputer and other circuits is shown in the figure, wherein an input signal is connected with an input/output interface of the microprocessor.
Claims (7)
1. The utility model provides a high-power high voltage direct current electrostatic power supply device, includes power supply circuit, pressure regulating rectifier circuit, rectification output circuit and overcurrent protection circuit, its characterized in that:
the system also comprises an inversion driver, an inverter and a boosting transformer;
the power circuit supplies power to the whole circuit through an isolation transformer;
the voltage regulating rectification circuit receives alternating current transmitted by the power supply circuit and outputs stable direct current to the inverter;
the inverter driver generates double-drive square waves to drive a power transistor (IGBT) of the inverter;
the inverter converts the direct current sent by the voltage regulating rectification circuit into high-frequency alternating current for boosting by the booster transformer;
the step-up transformer steps up the high-frequency alternating current output by the inverter and outputs high-voltage direct current through the rectification output circuit;
an overcurrent protection circuit collects a current signal of the inverter and sends the current signal to the inverter driver, the inverter driver detects the current, and if the current is larger than a preset value, the inverter driver stops outputting a pulse signal.
2. The high power high voltage direct current electrostatic power supply device according to claim 1, characterized in that; the device also comprises a microprocessor and an overvoltage and overcurrent protection circuit; wherein,
the overvoltage and overcurrent protection circuit collects voltage and current signals of the voltage regulating and rectifying circuit and sends the voltage and current signals to the microprocessor, the microprocessor judges whether the voltage and the current are higher than preset values, if so, the microprocessor outputs control signals and cuts off the output of the power circuit;
the step-up transformer outputs a current signal to the microprocessor through an overcurrent protection circuit, and if the microprocessor judges that the current is higher than a preset value, the step-up transformer outputs a control signal to cut off the output of the power circuit;
the microprocessor detects the pulse signal output by the inverter driver, and if the inverter driver has no signal output, the microprocessor outputs a control signal to cut off the output of the power circuit;
and the microprocessor samples and judges the high-voltage direct-current voltage output by the rectifying circuit, and if the voltage value is within a preset range, the microprocessor outputs a control signal and the voltage-regulating rectifying circuit stops working.
3. The high power high voltage direct current electrostatic power supply device according to claim 2, characterized in that: a pulse generator for providing pulse signal to the inverter driver; pulse signals enter a driver through input ends (P8, P12) of an inverter driver, a Schmitt trigger shapes the signals, the shaped pulses enter a primary side of an isolation transformer through an AND gate, a secondary side of the isolation transformer obtains driving signals in phase with the input pulses, and the driving signals are output through output ends (S8, S14) of the inverter driver.
4. The high power high voltage direct current electrostatic power supply device according to claim 3, characterized in that: the inverter adopts a novel high-power transistor (IGBT) inverter and consists of input resistors (R19, R20, R22 and R23); input protection resistors (R25, R26); a bidirectional voltage regulator tube (D4-D7) and a novel power switch tube (IGBT) half-bridge capacitor (C9, C10); freewheel diodes (D8, D9); voltage-stabilizing tubes (D4, D5, D6 and D7) are respectively connected in series in an opposite direction, then are connected in parallel with resistors (R25 and R26) and are connected to a trigger electrode of the (IGBT); the emitter and collector of the double (IGBT) are respectively connected in series through D8 and D9, and the bridge arm midpoint outgoing line is connected with the midpoint outgoing line of the half-bridge capacitors (C9 and C10) which are connected in series through a step-up transformer to form the half-bridge inverter.
5. The high power high voltage direct current electrostatic power supply device according to claim 4, characterized in that: the boosting transformer comprises three transformers; the primary coils of the three transformers are connected in parallel, and the secondary coils are respectively rectified and then connected in series to output high-voltage direct current.
6. The high power high voltage direct current electrostatic power supply device according to claim 5, characterized in that: the microprocessor adopts a 8031 type singlechip.
7. The high power high voltage direct current electrostatic power supply device according to claim 6, characterized in that: the voltage regulating and rectifying circuit adopts a voltage regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02121413 CN1245796C (en) | 2002-06-20 | 2002-06-20 | High-power high-voltage D. C. electrostatic electric power unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02121413 CN1245796C (en) | 2002-06-20 | 2002-06-20 | High-power high-voltage D. C. electrostatic electric power unit |
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| Publication Number | Publication Date |
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| CN1464626A true CN1464626A (en) | 2003-12-31 |
| CN1245796C CN1245796C (en) | 2006-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02121413 Expired - Fee Related CN1245796C (en) | 2002-06-20 | 2002-06-20 | High-power high-voltage D. C. electrostatic electric power unit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102755931A (en) * | 2011-12-21 | 2012-10-31 | 厦门锐传科技有限公司 | Variable-frequency medium-frequency power supply for electrostatic dust collection |
| CN102780384A (en) * | 2012-08-22 | 2012-11-14 | 成都中大华瑞科技有限公司 | High-performance low-cost IGBT (Insulated Gate Bipolar Translator) negative pressure bootstrap drive circuit |
| CN103298231A (en) * | 2012-02-28 | 2013-09-11 | 南京普爱射线影像设备有限公司 | Invertion device for high pressure generator of cold cathode X-ray ray tube |
| CN104734185A (en) * | 2015-02-13 | 2015-06-24 | 华中科技大学 | Tokamak plasma disruption energy processing device and processing method |
| CN105306018A (en) * | 2014-07-24 | 2016-02-03 | 矢崎总业株式会社 | Schmitt trigger circuit and power supply monitoring apparatus |
| CN109843701A (en) * | 2016-10-13 | 2019-06-04 | 三菱电机株式会社 | Electric power steering apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188900B (en) * | 2007-10-17 | 2011-07-20 | 廖云峰 | Medical diagnosis X ray high-frequency and high-voltage generator based on dual-bed and dual-tube |
-
2002
- 2002-06-20 CN CN 02121413 patent/CN1245796C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102755931A (en) * | 2011-12-21 | 2012-10-31 | 厦门锐传科技有限公司 | Variable-frequency medium-frequency power supply for electrostatic dust collection |
| CN103298231A (en) * | 2012-02-28 | 2013-09-11 | 南京普爱射线影像设备有限公司 | Invertion device for high pressure generator of cold cathode X-ray ray tube |
| CN102780384A (en) * | 2012-08-22 | 2012-11-14 | 成都中大华瑞科技有限公司 | High-performance low-cost IGBT (Insulated Gate Bipolar Translator) negative pressure bootstrap drive circuit |
| CN105306018A (en) * | 2014-07-24 | 2016-02-03 | 矢崎总业株式会社 | Schmitt trigger circuit and power supply monitoring apparatus |
| CN105306018B (en) * | 2014-07-24 | 2018-10-30 | 矢崎总业株式会社 | Schmitt trigger circuit and power source monitoring device |
| CN104734185A (en) * | 2015-02-13 | 2015-06-24 | 华中科技大学 | Tokamak plasma disruption energy processing device and processing method |
| CN109843701A (en) * | 2016-10-13 | 2019-06-04 | 三菱电机株式会社 | Electric power steering apparatus |
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| Publication number | Publication date |
|---|---|
| CN1245796C (en) | 2006-03-15 |
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Owner name: BEIJING TIANDISIHAI ENVIRONMENTAL TECHNOLOGY CO.L Free format text: FORMER OWNER: WEN FUSHENG; CHANG GUANGYUE Effective date: 20070720 |
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Effective date of registration: 20070720 Address after: 100080, No. 1329, block C, building 1, Beijing Zhongguancun Software Park incubator, Haidian District, Beijing, Northeast China Patentee after: Beijing Tiandi Sihai environmental protection science and Technology Co Ltd Address before: 100037 Beijing city Xicheng District Yuetanbeijie Hospital No. 25, 36 building 3 unit 001 room Co-patentee before: Chang Guangyue Patentee before: Wen Fusheng |
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Application publication date: 20031231 Assignee: Quzhou yuan environmental protection equipment Co. Assignor: Beijing Tiandi Sihai environmental protection science and Technology Co Ltd Contract record no.: 2010990000088 Denomination of invention: High-power high-voltage D. C. electrostatic electric power unit Granted publication date: 20060315 License type: Exclusive License Record date: 20100221 |
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Granted publication date: 20060315 Termination date: 20100620 |