CN102288217A - Integrated type high-voltage frequency converter analog quantity detecting method and device - Google Patents
Integrated type high-voltage frequency converter analog quantity detecting method and device Download PDFInfo
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- CN102288217A CN102288217A CN2011100910107A CN201110091010A CN102288217A CN 102288217 A CN102288217 A CN 102288217A CN 2011100910107 A CN2011100910107 A CN 2011100910107A CN 201110091010 A CN201110091010 A CN 201110091010A CN 102288217 A CN102288217 A CN 102288217A
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Abstract
The invention discloses an integrated type high-voltage frequency converter analog quantity detecting method and a device. The method is characterized in that: each detecting unit takes a logic controller as an integrated core which is used for integrated processing; acquired analog signals, temperature signals and velocity signals are processed by each unit and then are centrally sent to the logic controller for comprehensively processing; and then the logic controller sends processed information to a frequency converter main controller through optical fiber. The invention breaks through the traditional scattered type detecting manner, so that not all of the detecting units are required to be directly connected with the frequency converter main controller, but the information is comprehensively processed and is then sent to the frequency converter main controller through the logic controller. The device disclosed by the invention has a simple structure, low wiring difficulty, high reliability and low cost and is suitable for popularization and application in a wide range.
Description
Technical field
The invention belongs to a kind of detection method and device in the Power Electronic Technique, a kind of integrated form high voltage converter of specific design analog quantity detection method and device.
Background technology
At present, the whole world perplexs for energy scarcity, and the energy situation of China is especially severe.Along with fast development of Chinese economy, the energy becomes the bottleneck of restriction economic growth, and saving consumption reduction also just becomes the problem of country and enterprise's serious concerns.High voltage converter with desirable energy-saving effect and speed adjusting performance causes showing great attention to of responsible departments of the government and each high energy-consuming enterprises, and frequency conversion becomes first-selected energy-conserving product.
In the process of current exploitation high voltage converter, need detect frequency converter internal simulation amount, as: cabinet temperature, blower pressure, the given frequency of DCS or the like.Detection in the past mainly is that distributing detects, and each analog quantity has pick-up unit separately, and this method of testing causes pick-up unit complex structure, frequency converter wiring confusion, and cost is higher.
At deficiency of the prior art, the present invention is proposed.
Summary of the invention
Detect dispersion, complex structure, shortcoming that cost is high at analog quantity in the prior art, the invention provides a kind of is the integrated form high voltage converter analog quantity detection method and the device of integrated core with logic control device; This method and device can be integrated in the detection of a plurality of frequency converter internal simulation amounts such as temperature signal, rate signal in the device, and simple in structure, the wiring difficulty is little, the reliability height, and cost is lower.
The technical solution used in the present invention is: a kind of integrated form high voltage converter analog quantity detection method, comprise the analog signal detection unit, temperature detecting unit, speed detection unit, logic controller, wherein the detected analog signals of analog quantity detecting unit is behind the digitizing change-over circuit, convert the signal that logic controller can be discerned to, enter logic controller; The detected temperature signal of temperature detecting unit converts the signal that logic controller can be discerned to through digitizer, enters logic controller; The signal of the detected representation speed of speed detection unit enters logic controller behind signal conditioning circuit.The signal that logic controller is sent here three detecting units carries out overall treatment, and result is sent into the frequency converter master controller by optical fiber.Like this, just having constituted is the integrated form high voltage converter analog quantity pick-up unit of integration hub with the logic controller, and will the detected information of each detecting unit not insert the frequency converter master controller respectively.
Described logic controller adopts field programmable gate array chip FPGA.
Described logic controller is connected with the frequency converter master controller by optical fiber.
Described analog signal detection unit comprises differential amplifier circuit and digitizing change-over circuit, and wherein differential amplifier circuit has holding circuit, and the digitizing change-over circuit can be made of general digitizing change-over circuit.
Described temperature detecting unit comprises three-wire system testing circuit, filtering circuit and digitizing change-over circuit, and wherein the digitizing change-over circuit can be made of general digitizing change-over circuit.
Described speed detection unit comprises speed pickup and signal conditioning circuit, and wherein signal conditioning circuit carries out overvoltage protection, comparison, shaping, isolation processing to the pulse signal by speed pickup output, can be made of the universal circuit with these functions.
According to a kind of integrated form high voltage converter analog quantity pick-up unit that said method proposed, comprise the analog signal detection unit, temperature detecting unit, speed detection unit, logic controller, wherein the analog signal detection unit is connected with logic controller, temperature detecting unit is connected with logic controller, speed detection unit is connected with logic controller, logic controller is connected with the frequency converter master controller, the detected signal of each detecting unit is sent into logic control device later through each cell processing, by logic control device each input signal is carried out overall treatment, and result is sent into the frequency converter master controller.
Described logic controller can adopt field programmable gate array chip FPGA, or the complex programmable device chip, or microcontroller chip, or DSP chip, and perhaps other can realize the chip of function of the present invention.
Described logic controller is connected with the frequency converter master controller by optical fiber.
Described analog signal detection unit can comprise differential amplifier circuit and digitizing change-over circuit, and wherein differential amplifier circuit has holding circuit, and the digitizing change-over circuit can be made of general digitizing change-over circuit.
Described temperature detecting unit can comprise three-wire system testing circuit, filtering circuit and digitizing change-over circuit, and wherein the digitizing change-over circuit can be made of general digitizing change-over circuit.
Described speed detection unit can comprise speed pickup and signal conditioning circuit, and wherein signal conditioning circuit carries out overvoltage protection, comparison, shaping, isolation processing to the pulse signal by speed pickup output, can be made of the universal circuit with these functions.
The maximum characteristics that the present invention is different from prior art be exactly each detecting unit be that integrated core is carried out integrated processing with logic controller, the simulating signal, temperature signal, the rate signal that collect are sent into the logic controller comprehensive improvement through concentrating after each cell processing, send into the frequency converter master controller by the information that logic controller will be put in order by optical fiber again.Advantage of the present invention comprise following some:
The first, adopt integration mode to detect each analog quantity, many each analog quantitys that record are integrated in the logic controller after treatment, finish information interaction with the frequency converter master controller by logic controller, compared with prior art, structure is simpler, the wiring difficulty is little, the reliability height.
The second, the interference of temperature, noise and common-mode signal has effectively been eliminated in the employing of filtering circuit and difference channel, has improved accuracy of detection and accuracy.
The 3rd, adopt optical fiber communication technology between whole detection device and the high-pressure frequency-conversion master control board, but reducing, the isolated high-voltage long-distance transmissions disturbs, easy to use, improved reliability, greatly reduce system cost.
The 4th, analog quantity pick-up unit of the present invention as main detecting element, is fit to analog acquisition integrated of frequency converter with sensor more, cooperates other interlock circuits, guaranteed the reliability service of device, had the advantages that volume is small and exquisite, precision is high, safe and reliable.
Further set forth the present invention below by the drawings and specific embodiments.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is an analog quantity detection cell circuit structural drawing of the present invention.
Fig. 3 is a temperature collecting cell circuit structure diagram of the present invention.
Fig. 4 is the theory diagram that rate signal of the present invention is gathered.
Embodiment
As shown in Figure 1, a kind of integrated form high voltage converter analog quantity pick-up unit, comprise the analog signal detection unit, temperature detecting unit, speed detection unit, logic controller, wherein the analog signal detection unit is connected with logic controller, temperature detecting unit is connected with logic controller, speed detection unit is connected with logic controller, logic controller is connected with the frequency converter master controller by optical fiber, the detected signal of each detecting unit is sent into logic control device later through each cell processing, by logic control device each input signal is carried out overall treatment, and result is sent into the frequency converter master controller.
As shown in Figure 1, described logic controller can adopt field programmable gate array chip FPGA, and FPGA realizes the control to the digitized processing sampling, and software filtering is carried out in the digitizing conversion, high pressure and harmonic signal are carried out filtering for the second time, improved antijamming capability.
As shown in Figure 1, described logic controller FPGA is connected with the frequency converter master controller by optical fiber, FPGA and frequency converter master control borad carry out optical-fibre communications, transferring electric signal to light signal transmits, overcome the many disadvantages of electric signal transmission, solve incidental data corruption problem in the data transmission exchange, had good anti-electromagnetic interference performance.
As shown in Figure 2, described analog signal detection unit can comprise differential amplifier circuit and digitizing change-over circuit, wherein R1, R2, R3, R4 and amplifier have constituted difference channel, differential amplifier circuit has holding circuit, inductance L 1 can prevent current break, effectively suppress surge, transition killer tube D1 protects input signal, prevents to import excessive circuit to be caused damage; The digitizing change-over circuit can be made of general digitizing change-over circuit, and its circuit theory diagrams will not provide at this.
As shown in Figure 3, described temperature detecting unit can comprise three-wire system testing circuit, filtering circuit and digitizing change-over circuit, wherein R1, R2, N1, N2 have constituted the testing circuit of three-wire system, R3, R4, R5, R6, C1, C2, N2 have constituted filtering circuit, the three-wire system thermometric can be eliminated the lead-in wire error, effectively reduces common mode interference; The digitizing change-over circuit can be made of general digitizing change-over circuit, and its circuit theory diagrams will not provide at this.The processing mode of employing three-wire system testing circuit has improved the antijamming capability of high voltage converter, has guaranteed the accuracy that temperature signal detects.
As shown in Figure 4; described speed detection unit can comprise speed pickup and signal conditioning circuit; wherein signal conditioning circuit carries out overvoltage protection, comparison, shaping, isolation processing to the pulse signal by speed pickup output, can be made of the universal circuit with these functions, the physical circuit schematic diagram will not provide at this.
Embodiment one
A kind of integrated form high voltage converter analog quantity pick-up unit, comprise the analog signal detection unit, temperature detecting unit, speed detection unit, logic controller, wherein the detected analog signals of analog quantity detecting unit is behind the digitizing change-over circuit, convert the signal that logic controller can be discerned to, enter logic controller; The detected temperature signal of temperature detecting unit converts the signal that logic controller can be discerned to through digitizer, enters logic controller; The signal of the detected representation speed of speed detection unit enters logic controller behind signal conditioning circuit.The signal that logic controller is sent here three detecting units carries out overall treatment, and result is sent into the frequency converter master controller by optical fiber.Like this, just having constituted is the integrated form high voltage converter analog quantity pick-up unit of integration hub with the logic controller, and will the detected information of each detecting unit not insert the frequency converter master controller respectively.
Described logic controller adopts field programmable gate array chip FPGA.
Described logic controller is connected with the frequency converter master controller by optical fiber.
Described analog signal detection unit comprises differential amplifier circuit and digitizing change-over circuit, and wherein differential amplifier circuit has holding circuit, and the digitizing change-over circuit can be made of general digitizing change-over circuit.
Described temperature detecting unit comprises three-wire system testing circuit, filtering circuit and digitizing change-over circuit, and wherein the digitizing change-over circuit can be made of general digitizing change-over circuit.
Described speed detection unit comprises speed pickup and signal conditioning circuit, and wherein signal conditioning circuit carries out overvoltage protection, comparison, shaping, isolation processing to the pulse signal by speed pickup output, can be made of the universal circuit with these functions.
In sum, the invention has the advantages that:
1, adopt integration mode to detect each analog quantity, many each analog quantitys that record are integrated in the logic controller after treatment, finish information interaction with the frequency converter master controller by logic controller, compared with prior art, structure is simpler, the wiring difficulty is little, the reliability height.
2, the interference of temperature, noise and common-mode signal has effectively been eliminated in the employing of filtering circuit and difference channel, has improved accuracy of detection and accuracy.
3, adopt optical fiber communication technology between whole detection device and the high-pressure frequency-conversion master control board, but reducing, the isolated high-voltage long-distance transmissions disturbs, easy to use, improved reliability, greatly reduce system cost.
4, analog quantity pick-up unit of the present invention as main detecting element, is fit to analog acquisition integrated of frequency converter with sensor more, cooperates other interlock circuits, guaranteed the reliability service of device, had the advantages that volume is small and exquisite, precision is high, safe and reliable.
Claims (10)
1. integrated form high voltage converter analog quantity detection method, it is characterized in that: comprise the analog signal detection unit, temperature detecting unit, speed detection unit, logic controller, wherein the detected analog signals of analog quantity detecting unit is behind the digitizing change-over circuit, convert the signal that logic controller can be discerned to, enter logic controller; The detected temperature signal of temperature detecting unit converts the signal that logic controller can be discerned to through digitizer, enters logic controller; The signal of the detected representation speed of speed detection unit enters logic controller behind signal conditioning circuit; The signal that logic controller is sent here three detecting units carries out overall treatment, and result is sent into the frequency converter master controller by optical fiber; Like this, just having constituted is the integrated form high voltage converter analog quantity pick-up unit of integration hub with the logic controller, and will the detected information of each detecting unit not insert the frequency converter master controller respectively.
2. integrated form high voltage converter analog quantity detection method according to claim 1, it is characterized in that: described analog signal detection unit comprises differential amplifier circuit and digitizing change-over circuit, wherein differential amplifier circuit has holding circuit, and the digitizing change-over circuit can be made of general digitizing change-over circuit; Described temperature detecting unit comprises three-wire system testing circuit, filtering circuit and digitizing change-over circuit, and wherein the digitizing change-over circuit can be made of general digitizing change-over circuit; Described speed detection unit comprises speed pickup and signal conditioning circuit, and wherein signal conditioning circuit carries out overvoltage protection, comparison, shaping, isolation processing to the pulse signal by speed pickup output, can be made of the universal circuit with these functions.
3. integrated form high voltage converter analog quantity detection method according to claim 1 and 2 is characterized in that: described logic controller adopts field programmable gate array chip FPGA.
4. integrated form high voltage converter analog quantity detection method according to claim 3, it is characterized in that: described logic controller is connected with the frequency converter master controller by optical fiber.
5. integrated form high voltage converter analog quantity pick-up unit, it is characterized in that comprising the analog signal detection unit, temperature detecting unit, speed detection unit, logic controller, wherein the analog signal detection unit is connected with logic controller, temperature detecting unit is connected with logic controller, speed detection unit is connected with logic controller, logic controller is connected with the frequency converter master controller, the detected signal of each detecting unit is sent into logic control device later through each cell processing, by logic control device each input signal is carried out overall treatment, and result is sent into the frequency converter master controller.
6. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 5, it is characterized in that described logic controller can adopt field programmable gate array chip FPGA, or the complex programmable device chip, or microcontroller chip, or DSP chip.
7. according to claim 5 or 6 described a kind of integrated form high voltage converter analog quantity pick-up units, it is characterized in that described logic controller is connected with the frequency converter master controller by optical fiber.
8. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 7; it is characterized in that described analog signal detection unit can comprise differential amplifier circuit and digitizing change-over circuit; wherein differential amplifier circuit has holding circuit, and the digitizing change-over circuit can be made of general digitizing change-over circuit.
9. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 8, it is characterized in that described temperature detecting unit can comprise three-wire system testing circuit, filtering circuit and digitizing change-over circuit, wherein the digitizing change-over circuit can be made of general digitizing change-over circuit.
10. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 9; it is characterized in that described speed detection unit can comprise speed pickup and signal conditioning circuit; wherein signal conditioning circuit carries out overvoltage protection, comparison, shaping, isolation processing to the pulse signal by speed pickup output, can be made of the universal circuit with these functions.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100910107A CN102288217A (en) | 2011-04-12 | 2011-04-12 | Integrated type high-voltage frequency converter analog quantity detecting method and device |
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| CN2011100910107A CN102288217A (en) | 2011-04-12 | 2011-04-12 | Integrated type high-voltage frequency converter analog quantity detecting method and device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1234760A1 (en) * | 1984-03-13 | 1986-05-30 | Предприятие П/Я А-1209 | Meter of physical quantities |
| CN101431290A (en) * | 2008-12-15 | 2009-05-13 | 株洲变流技术国家工程研究中心有限公司 | Optical fiber connecting method for cascade type medium-high voltage frequency convertor |
| CN101738553A (en) * | 2009-12-25 | 2010-06-16 | 三一电气有限责任公司 | Universal testing system of frequency transformer and current transformer |
| CN201570856U (en) * | 2009-11-05 | 2010-09-01 | 北京中矿华飞科技有限公司 | Intelligent monitoring unit applied to high-voltage frequency inverter |
| CN202119469U (en) * | 2011-04-12 | 2012-01-18 | 株洲变流技术国家工程研究中心有限公司 | Analog quantity detecting device of integrated high-voltage frequency converter |
-
2011
- 2011-04-12 CN CN2011100910107A patent/CN102288217A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1234760A1 (en) * | 1984-03-13 | 1986-05-30 | Предприятие П/Я А-1209 | Meter of physical quantities |
| CN101431290A (en) * | 2008-12-15 | 2009-05-13 | 株洲变流技术国家工程研究中心有限公司 | Optical fiber connecting method for cascade type medium-high voltage frequency convertor |
| CN201570856U (en) * | 2009-11-05 | 2010-09-01 | 北京中矿华飞科技有限公司 | Intelligent monitoring unit applied to high-voltage frequency inverter |
| CN101738553A (en) * | 2009-12-25 | 2010-06-16 | 三一电气有限责任公司 | Universal testing system of frequency transformer and current transformer |
| CN202119469U (en) * | 2011-04-12 | 2012-01-18 | 株洲变流技术国家工程研究中心有限公司 | Analog quantity detecting device of integrated high-voltage frequency converter |
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Application publication date: 20111221 |