CN202119469U - Analog quantity detecting device of integrated high-voltage frequency converter - Google Patents
Analog quantity detecting device of integrated high-voltage frequency converter Download PDFInfo
- Publication number
- CN202119469U CN202119469U CN2011201057899U CN201120105789U CN202119469U CN 202119469 U CN202119469 U CN 202119469U CN 2011201057899 U CN2011201057899 U CN 2011201057899U CN 201120105789 U CN201120105789 U CN 201120105789U CN 202119469 U CN202119469 U CN 202119469U
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- circuit
- logic controller
- frequency converter
- analog quantity
- digitizing
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Abstract
The utility model discloses an analog quantity detecting device of an integrated high-voltage frequency converter. All detecting units take a logic controller as an integrated core for integration. Collected simulation signals, temperature signals and speed signals are processed by the units and then sent into the logic controller for comprehensive arrangement. Then the logic controller sends the arranged information to a frequency converter main controller through optic fibers. In the utility model, a prior distributed detecting method is abandoned. Thus, not all the detecting units need to be connected with the frequency converter main controller directly. The logic controller is adopted to integrate and process the information and send the information into the frequency converter main controller. The analog quantity detecting device of the integrated high-voltage frequency converter in the utility model has advantages of simple structure, low wiring difficulty, high reliability and low cost. The analog quantity detecting device of the integrated high-voltage frequency converter is suitable for spreading and applying in a wide range.
Description
Technical field
The utility model belongs to the pick-up unit in the Power Electronic Technique, specifically designs a kind of integrated form high voltage converter analog quantity pick-up unit.
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 practicing thrift 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.
To deficiency of the prior art, the utility model is proposed.
The utility model content
Detect dispersion, complex structure, shortcoming that cost is high to analog quantity in the prior art; It is the integrated form high voltage converter analog quantity pick-up unit of integrated core with logic control device that the utility model provides a kind of; The detection of a plurality of frequency converter internal simulation amounts such as temperature signal, rate signal is integrated in the device, and simple in structure, the wiring difficulty is little; Reliability is high, and cost is lower.
The technical scheme that the utility model adopts is: 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, and logic controller is connected with the frequency converter master controller, each detection to signal send into later logic control device 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.
Said 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 the utility model function.
Said logic controller is connected with the frequency converter master controller through optical fiber.
Said 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 up of general digitizing change-over circuit.
Said 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 up of general digitizing change-over circuit.
Said 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 up of the universal circuit with these functions.
The maximum characteristics that the utility model 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 that collects, temperature signal, rate signal 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 through optical fiber again.The advantage of the utility model 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; By the information interaction of logic controller completion with the frequency converter master controller, compared with prior art, structure is simpler; The wiring difficulty is little, and reliability is high.
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; The described analog quantity pick-up unit of the utility model as main detecting element, is fit to analog acquisition integrated of frequency converter with sensor more, cooperates other interlock circuits; Guarantee the reliability service of device, had advantages of small volume, characteristics that precision is high, safe and reliable.
Come further to set forth the utility model through accompanying drawing and embodiment below.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Fig. 2 is the utility model analog quantity detection cell circuit structural drawing.
Fig. 3 is the temperature collecting cell circuit structure diagram of the utility model.
Fig. 4 is the theory diagram that the rate signal of the utility model is gathered.
Embodiment
As shown in Figure 1, a kind of integrated form high voltage converter analog quantity pick-up unit comprises the analog signal detection unit; Temperature detecting unit, speed detection unit, logic controller; Wherein the analog signal detection unit is connected with logic controller, and temperature detecting unit is connected with logic controller, and speed detection unit is connected with logic controller; Logic controller is connected with the frequency converter master controller through optical fiber; Each detection to signal later send into logic control device 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; Said 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 harmonic signal is carried out filtering for the second time, improved antijamming capability.
As shown in Figure 1; Said logic controller FPGA is connected with the frequency converter master controller through optical fiber; FPGA and frequency converter master control borad carry out optical-fibre communications, transfer electric signal to light signal and transmit, and have 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; Said analog signal detection unit can comprise differential amplifier circuit and digitizing change-over circuit, and wherein R1, R2, R3, R4 and amplifier have constituted difference channel, and 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 up of general digitizing change-over circuit, and its circuit theory diagrams will not provide at this.
As shown in Figure 3; Said 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, and 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 up 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; Said 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 up 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 analog signals that arrives of analog quantity detection is behind the digitizing change-over circuit, and converting logic controller to can identified signal, gets into logic controller; The detected temperature signal of temperature detecting unit converts logic controller to through digitizer can identified signal, gets into logic controller; The signal of the detected representation speed of speed detection unit gets into logic controller behind signal conditioning circuit.The signal that logic controller is sent here three detecting units carries out overall treatment, and sends into the frequency converter master controller to result through 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 each detection to information insert the frequency converter master controller respectively.
Said logic controller adopts field programmable gate array chip FPGA.
Said logic controller is connected with the frequency converter master controller through optical fiber.
Said 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 up of general digitizing change-over circuit.
Said 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 up of general digitizing change-over circuit.
Said 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 up of the universal circuit with these functions.
In sum, the advantage of the utility model is:
1, adopt integration mode to detect each analog quantity, many each analog quantitys that record are integrated in the logic controller after treatment; By the information interaction of logic controller completion with the frequency converter master controller, compared with prior art, structure is simpler; The wiring difficulty is little, and reliability is high.
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; The described analog quantity pick-up unit of the utility model as main detecting element, is fit to analog acquisition integrated of frequency converter with sensor more, cooperates other interlock circuits; Guarantee the reliability service of device, had advantages of small volume, characteristics that precision is high, safe and reliable.
Claims (6)
1. 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, and logic controller is connected with the frequency converter master controller, each detection to signal send into later logic control device 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.
2. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 1; It is characterized in that said logic controller can adopt field programmable gate array chip FPGA; Or the complex programmable device chip, or microcontroller chip, or DSP chip.
3. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 1 and 2 is characterized in that said logic controller is connected with the frequency converter master controller through optical fiber.
4. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 3; It is characterized in that said 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 up of general digitizing change-over circuit.
5. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 4; It is characterized in that said 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 up of general digitizing change-over circuit.
6. a kind of integrated form high voltage converter analog quantity pick-up unit according to claim 5; It is characterized in that said 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 up of the universal circuit with these functions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201057899U CN202119469U (en) | 2011-04-12 | 2011-04-12 | Analog quantity detecting device of integrated high-voltage frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201057899U CN202119469U (en) | 2011-04-12 | 2011-04-12 | Analog quantity detecting device of integrated high-voltage frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119469U true CN202119469U (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201057899U Expired - Lifetime CN202119469U (en) | 2011-04-12 | 2011-04-12 | Analog quantity detecting device of integrated high-voltage frequency converter |
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| CN (1) | CN202119469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288217A (en) * | 2011-04-12 | 2011-12-21 | 株洲变流技术国家工程研究中心有限公司 | Integrated type high-voltage frequency converter analog quantity detecting method and device |
-
2011
- 2011-04-12 CN CN2011201057899U patent/CN202119469U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288217A (en) * | 2011-04-12 | 2011-12-21 | 株洲变流技术国家工程研究中心有限公司 | Integrated type high-voltage frequency converter analog quantity detecting method and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |
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| CX01 | Expiry of patent term |