CN1092355C - Auto-controlled constant-current high-voltage DC power supply - Google Patents
Auto-controlled constant-current high-voltage DC power supply Download PDFInfo
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- CN1092355C CN1092355C CN 98110626 CN98110626A CN1092355C CN 1092355 C CN1092355 C CN 1092355C CN 98110626 CN98110626 CN 98110626 CN 98110626 A CN98110626 A CN 98110626A CN 1092355 C CN1092355 C CN 1092355C
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- power supply
- voltage
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- processing unit
- parameter sampling
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Abstract
The present invention relates to an automatically controlled constant-current and high-voltage DC power supply which is mainly used on an electrostatic dust-removing device. The present invention is formed by that a primary parameter sampling unit and a secondary parameter sampling unit are respectively arranged in a primary side circuit and a secondary side circuit of a high-voltage DC generator; the outputs of the primary parameter sampling unit and the secondary parameter sampling unit are accessed into a central processing unit of a microcomputer by a sample input mold / a plurality of converting units; a central processing unit is connected with a display screen, and the output of the central processing unit is accessed to a relay in an output control unit provided with an alarm. A power supply of the present invention is automatically controlled. Thus, the power supply can be controlled at a best operating point all the time. The present invention used on a dust-removing device can obtain maximum dust removal efficiency.
Description
The invention relates to the constant-current high-voltage DC power supply of employed employing microcomputer automatic control in the electrostatic precipitation field.
Its operation of constant-current high-voltage DC power supply that is used for electrostatic precipitation is controlled at existing technology and all adopts hand-guided (seeing patent: ZL86203043.9 and ZL94239157.8) not adopt automaton with device, does not more adopt the microcomputer automatic control circuit.Thereby its control method do not possess advance, can't realize the centralized control of central control room.The collection of service data, storage, demonstration and printing all can't realize, thereby also limit the range of application of this power supply.
Hand-guided can not feed back to control circuit fast according to the field working conditions situation, thereby also can not make dedusting power source keep operating in optimum condition, to reach best dust removing effects.The power supply that is provided with automatic control in a word can't be applied in the advanced equipment.
Purpose of the present invention is the backward state that overcomes the hand-guided power supply of above-mentioned prior art, adopts the structure of closed loop microcomputer automatic control, reaches automatic collection service data, storage, demonstration and printing, realizes the centralized control by central control room.And can make dedusting power source operate in optimum condition always.
Constant-current high-voltage DC power supply of the present invention comprises: high voltage direct current generator 4, be equipped with secondary parameter sampling assemble 5 in the loop between high voltage direct current generator 4 and load 6, in the loop of high voltage direct current generator 4 primary sides, be connected to elementary parameter sampling assemble 3, secondary parameter sampling assemble 5 all inserts sampling input A/D converter 7 with the output signal of elementary parameter sampling assemble 3, sampling input A/D converter 7 inserts the central processing unit (CPU) 9 of microcomputer, central processing unit 9 is equipped with display screen 8, and the output of central processing unit 9 links to each other with the relay 10 that places the output control unit 2 between power supply 1 and the elementary parameter sampling assemble 3.As shown in Figure 1.
Contain voltage changer 301 and power pack 302 in the said elementary parameter sampling assemble 3.Contain voltage changer 501 and power pack 502 in the secondary parameter sampling assemble 5.
Contain on the microcomputer of central processing unit 9 the both-way communication interface that is connected with up-computer (microcomputer of central control room just) is arranged.
Constant-current high-voltage DC power supply of the present invention is to take out working voltage U at high voltage direct current generator 4 output high-pressure sides by secondary parameter sampling assemble 5
2And electric current I
2Sampled signal, take out input voltage U simultaneously
1And electric current I
1Sampled signal, the numerical value change of these sampled signals has reflected the ruuning situation of power supply.These sampled signals through mould/transformation of variables, are input in the central processing unit (CPU) 9 of microcomputer.In central processing unit 9, according to fuzzy control theory, these data are handled, judge, and remove to control constant current assembly in the power supply by desired program.In the hope of reaching optimal operational condition.
Simultaneously, above-mentioned microcomputer can store the data that collect, and shows, and carries out the data printout as required.
The Control System of Microcomputer of above-mentioned power supply is by standard interface RS-485 and up-computer, the microcomputer that is central control room carries out both-way communication and control, when power supply service data that Control System of Microcomputer is gathered is sent to up-computer, then up-computer can be controlled the operation of power supply, thereby can be implemented in the centralized and unified team control of central control room to many constant-current high-voltage DC power supplies.Reach the purpose of automatic control.
In addition, in the control module 2 of power supply many group alarms device is housed also, in case break down, just has alerting signal, failure alarm signal is delivered to the power supply microcomputer, can cut off the electricity supply, and report to the police, and shows out of order character etc.
Advantage of the present invention:
1. is furnished with primary and secondary parameter sampling assemble 3,5 in the constant-current high-voltage DC power supply of the present invention, the central processing unit 9 of sampling input A/D converter 7 and microcomputer, and display screen 8 and output control unit 2 constituted the Control System of Microcomputer of power supply, therefore realized it being the constant-current high-voltage DC power supply of control automatically.This just makes power supply to remain on the best operating point.When power supply is used for dust arrester, can obtain the highest efficiency of dust collection.
2. constant-current high-voltage DC power supply can be accomplished unmanned, automatically operation.Because both-way communication interface with up-computer can be arranged, can realize that central control room is to many centralized and unified controls of constant-current supply again.
3. because power supply of the present invention has the advance of automatic control, improved the high technology content of constant-current high-voltage DC power supply, except dust removing effects is better, also help the industrialization of product, help the sale of product, help the development of industrial automation, thereby increased economic and social benefit.
Description of drawings:
Fig. 1 is the structural representation of the constant-current high-voltage DC power supply of the automatic control of the present invention.
The process flow diagram that Fig. 2 controls in an embodiment automatically for the present invention.
Embodiment:
Structure as Fig. 1.Wherein sampling input A/D converter 7 is got operational amplifier MAX120, central processing unit 9 (CPU) is got 89C96, output control unit 2 repeat circuits 10 are got solid-state relay MOC3083, LC constant current assembly power taking stream 5A10 only in the power supply, electric current 2.5A1 only, electric current 1.25A1, electric current 0.625A1 only.
The power supply of said structure is used for electrostatic dust collection equipment, and the control mode that is adopted is got the best operating point control mode.
The best operating point control mode is to change slope by output voltage, spark rate, and three variablees of output voltage integration are realized.If output voltage is D with the slope that input current changes, i.e. U
D/ I
i=D (U
DBe output voltage, I
iBe transformer imput current) when D＞0, increase input current, until D=0, detect spark rate P this moment, when P reaches a certain set-point, reduces input current.Measure the certain hour integrated value of interior output voltage at interval subsequently, when this integrated value reduces to a certain set-point, begin to increase input current.Repeat said process then.This kind running status can make the dedusting electric field operate in maximum output voltage flashover not to take place again, reach output voltage current integration area maximum, and efficiency of dust collection is the highest.Idiographic flow as shown in Figure 2.
Claims (1)
1. automatic constant-current high-voltage DC power supply of control comprises:
1. high voltage direct current generator (4);
2. place high voltage direct current generator (4) primary side loop that elementary parameter sampling assemble (3) is arranged;
3. place the loop of high voltage direct current generator (4) secondary side bringing onto load (6) that secondary parameter sampling assemble (5) is arranged;
The output signal of 4. elementary parameter sampling assemble (3) and secondary parameter sampling assemble (5) all inserts in the sampling input A/D converter (7);
It is characterized in that:
5. place the output control unit (2) that has between power supply (1) and the high voltage direct current generator (4) by inductance (L) electric capacity (C) constant current assembly formation in parallel;
6. the output of sampling input A/D converter (7) inserts the central processing unit (9) in the microcomputer that has the both-way communication interface that links to each other with up-computer;
7. central processing unit (9) is equipped with display screen (8), and the output of central processing unit (9) links to each other with relay (10) in the output control unit that contains alarm (2), constitutes the closed loop microcomputer constant current structure of control automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110626 CN1092355C (en) | 1998-01-20 | 1998-01-20 | Auto-controlled constant-current high-voltage DC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110626 CN1092355C (en) | 1998-01-20 | 1998-01-20 | Auto-controlled constant-current high-voltage DC power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1224185A CN1224185A (en) | 1999-07-28 |
| CN1092355C true CN1092355C (en) | 2002-10-09 |
Family
ID=5220657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98110626 Expired - Fee Related CN1092355C (en) | 1998-01-20 | 1998-01-20 | Auto-controlled constant-current high-voltage DC power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1092355C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392547C (en) * | 2001-05-16 | 2008-06-04 | 中兴通讯股份有限公司 | High-voltage dc power supply program control system |
| CN112965563B (en) * | 2021-01-15 | 2022-07-15 | 惠州三华工业有限公司 | Two-stage constant current circuit with time delay and drive control method thereof |
-
1998
- 1998-01-20 CN CN 98110626 patent/CN1092355C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1224185A (en) | 1999-07-28 |
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