CN203219173U - Three-phase power factor transmitter - Google Patents
Three-phase power factor transmitter Download PDFInfo
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- CN203219173U CN203219173U CN2013202545988U CN201320254598U CN203219173U CN 203219173 U CN203219173 U CN 203219173U CN 2013202545988 U CN2013202545988 U CN 2013202545988U CN 201320254598 U CN201320254598 U CN 201320254598U CN 203219173 U CN203219173 U CN 203219173U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to a three-phase power factor transmitter. An isolation conversion computation unit is connected with an amplifying and filtering unit; the amplifying and filtering unit is connected with a 4-20mA signal output unit; a linear power supply is adopted as a power supply unit so as to provide power for the transmitter; the isolation conversion computation unit comprises a signal isolation amplifying circuit, a current signal phase-shift circuit, a D trigger circuit, a divider circuit and a time division multiplication circuit; the amplifying and filtering unit comprises a signal inversion amplifying circuit and a second-order low-pass Butterworth filter circuit; and the 4-20mA signal output unit comprises a zero-point full-scale adjustment circuit and a 4-20mA output driving circuit. The three-phase power factor transmitter of the utility model can convert measured active power into direct-current signals real time and accurately, and transmit the direct-current signals to a control room or a display device in a remote manner, and therefore, three-phase power factor transmitter input signals can be prevented from being connected in series with high voltage, and harm to terminal operators and damage to equipment can be avoided.
Description
Technical field
The utility model relates to signal and isolates the switch technology field, is specifically related to a kind of three-phase activity coefficient transmitter.
Background technology
Transmitter is that the signal of multi-form kind is converted to the DC analogue quantity signal of telecommunication that can be identified by controller, receiving terminal can be the equipment of simple function, no matter which type of signal can transfer to DCS system or robot control system(RCS) after corresponding transmitter is converted to unified standard signal.
Power factor is to weigh a coefficient of electric equipment efficient height.For electric load equipment is better monitored, take appropriate measures in light of the circumstances, be necessary the power factor of electrical network is detected.The three-phase activity coefficient transmitter is with the alternating current of same load and the power factor between the voltage, convert the direct current of pressing linear scale output on the spot to, improve transmission course antijamming capability and the 4-20mA electric current fuel gas such as gas that are not enough to ignite for the essential safe type signal, the detection disconnection function is provided, can be in real time, accurately the measured power factor is converted to the dc current signal long-distance transmissions to the control room or display device.Can be widely used in the electric device of departments such as oil, post and telecommunications, metallurgy, railway, municipal administration, electric power.
Summary of the invention
The purpose of this utility model is to provide a kind of three-phase activity coefficient transmitter, and long-distance transmissions, strong, the stable 4-20mA current signal of antijamming capability can be provided.
The purpose of this utility model is achieved in that a kind of three-phase activity coefficient transmitter, comprise housing, power subsystem, isolation conversion computing unit, amplification filtering unit and 4-20mA signal output unit, isolate the conversion computing unit and connect the amplification filtering unit, the amplification filtering unit connects the 4-20mA signal output unit, and power subsystem adopts the linear switch power supply to be the power supply of this transmitter; Described isolation conversion computing unit comprises that signal isolating amplifier circuit, current signal phase-shift circuit, d type flip flop circuit, divider circuit and time cuts apart multiplying operational circuit; Described amplification filtering unit comprises signals reverse amplifying circuit and step low-pass Butterworth filter circuit; Described 4-20mA signal output unit comprises zero adjustment circuit, full scale regulating circuit and 4-20mA output driving circuit; Measure the signal of telecommunication and insert isolating amplifier circuit, the current signal after the isolation inserts the d type flip flop circuit after the phase shift of electric current phase-shift circuit, and the d type flip flop circuit is exported control signal respectively and cut apart multiplying operational circuit in divider circuit, time and carry out computing; The computing output signal inserts step low-pass Butterworth filter circuit filtering after the signals reverse amplifying circuit is reverse, the signal of exporting after the filtering is control 4-20mA output driving circuit behind zero adjustment circuit and full scale regulating circuit successively.
The utility model also has following feature: aforesaid a kind of three-phase activity coefficient transmitter, its input signal is isolated withstand voltage more than 3000V to output signal.
The beneficial effects of the utility model have:
The utility model can be with the alternating current of same load and the power factor between the voltage, convert the direct current of pressing linear scale output on the spot to, improve transmission course antijamming capability and the 4-20mA electric current fuel gas such as gas that are not enough to ignite for the essential safe type signal, the detection disconnection function is provided, can be in real time, accurately tested active power is converted to the dc current signal long-distance transmissions to the control room or display device.Its input signal is isolated more than the withstand voltage 3000V output signal, can prevent effectively that three-phase activity coefficient transmitter input signal from sealing in high pressure, and prevent from terminal operation personnel and equipment are worked the mischief.
Description of drawings
Fig. 1 is housing schematic diagram of the present utility model;
Fig. 2 is theory diagram of the present utility model;
Fig. 3 is isolating amplifier circuit, current signal phase-shift circuit, the d type flip flop circuit theory diagrams in the isolation conversion computing unit of the present utility model;
Fig. 4 is cut apart multiplying operational circuit and amplification filtering unit schematic diagram for divider circuit, time in the isolation conversion computing unit of the present utility model;
Fig. 5 is 4-20mA output driving circuit schematic diagram of the present utility model;
Wherein, 1, power subsystem, 2, isolate the conversion computing unit, 3, amplification filtering unit, 4, the 4-20mA signal output unit, 5, the signal isolating amplifier circuit, 6, current signal phase-shift circuit, 7, the d type flip flop circuit, 8, divider circuit, 9, the time is cut apart multiplying operational circuit, 10, signals reverse amplifying circuit, 11, step low-pass Butterworth filter circuit, 12, zero adjustment circuit, 13, full scale regulating circuit, 14, the 4-20mA output driving circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described:
Embodiment 1
A kind of DBS/Q-721 type three-phase activity coefficient transmitter, comprise housing, power subsystem, isolation conversion computing unit, amplification filtering unit and 4-20mA signal output unit, isolate the conversion computing unit and connect the amplification filtering unit, the amplification filtering unit connects the 4-20mA signal output unit, and power subsystem adopts the linear switch power supply to be the power supply of this transmitter; Described isolation conversion computing unit comprises that signal isolating amplifier circuit, current signal phase-shift circuit, d type flip flop circuit, divider circuit and time cuts apart multiplying operational circuit; Described amplification filtering unit comprises signals reverse amplifying circuit and step low-pass Butterworth filter circuit; Described 4-20mA signal output unit comprises zero adjustment circuit, full scale regulating circuit and 4-20mA output driving circuit; Measure the signal of telecommunication and insert isolating amplifier circuit, the current signal after the isolation inserts the d type flip flop circuit after the phase shift of electric current phase-shift circuit, and the d type flip flop circuit is exported control signal respectively and cut apart multiplying operational circuit in divider circuit, time and carry out computing; The computing output signal inserts step low-pass Butterworth filter circuit filtering after the signals reverse amplifying circuit is reverse, the signal of exporting after the filtering is control 4-20mA output driving circuit behind zero adjustment circuit and full scale regulating circuit successively.
Described its input signal of three-phase activity coefficient transmitter is isolated more than the withstand voltage 3000V output signal, can prevent effectively that three phases active power transmitter input signal from sealing in high pressure, to the harm of terminal operation personnel and equipment and DCS system and the automatic control system of stable, reliable 4-20mA signal to the power plant are provided.
1, housing: constituted by fire-retardant black ABS plastic, be divided into loam cake, guide rail buckle, case cover composition.
2, power subsystem: adopt the power supply of linear switch power supply, guarantee the stable and reliable of system power supply, improve system accuracy.
3, isolate the conversion computing unit: the voltage that is converted three-phase activity coefficient, current signal are inserted respectively voltage transformer is elementary, current transformer is elementary, after the amplification of the instrument transformer output signal signal of A phase phase current and BC line voltage, pass through d type flip flop rising edge zero cross fired again, can obtain reflecting the square-wave signal of phase place.The square-wave signal control time of phase place is cut apart multiplying operational circuit, multiply by BC line voltage AC signal, by division circuit, divided by conversion coefficient, obtains the square-wave signal of three-phase activity coefficient.
4, amplification filtering unit: the square-wave signal of three-phase activity coefficient signal of telecommunication after reverse amplification circuit amplifies enters step low-pass Butterworth filter circuit, and the filtering high-frequency interferencing signal also changes square-wave signal into the d. c. voltage signal of three-phase activity coefficient.
5,4-20mA signal output unit: receive the d. c. voltage signal of the three-phase activity coefficient of amplification filtering unit output, drive the 4-20mA output circuit, output 4-20mA electric current.
Three-phase activity coefficient transmitter job step is as follows:
The voltage that is converted three-phase activity coefficient, current signal inserted respectively voltage transformer is elementary, current transformer is elementary, after the amplification of the instrument transformer output signal signal of A phase phase current and BC line voltage, pass through d type flip flop rising edge zero cross fired (as Fig. 3) again, can obtain reflecting the square-wave signal of phase place.The square-wave signal control time of phase place is cut apart multiplying operational circuit, multiply by BC line voltage AC signal, passing through division circuit, behind conversion coefficient, be converted into the d. c. voltage signal of three-phase activity coefficient by reverse amplification circuit, step low-pass Butterworth filter circuit, the three-phase activity coefficient d. c. voltage signal drives the 4-20mA output circuit, output 4-20mA electric current.
The beneficial effects of the utility model have:
1, the utility model is a kind of generator's power and angle on-line monitoring equipment, can be in merit horn shape condition during the continuous monitoring generator operation under the generator operating condition, prevention generator unstability and monitor its stable remaining and provide the real-time reliable data for electrical network dynamic security detection system.
2, provide reliable basis for the low safety depth of encouraging restriction of excitation system.The generation of prevention system low-frequency oscillation guarantees the stability of remote large capacity transmission.
Claims (2)
1. three-phase activity coefficient transmitter, comprise housing, power subsystem, isolation conversion computing unit, amplification filtering unit and 4-20mA signal output unit, it is characterized in that: isolate the conversion computing unit and connect the amplification filtering unit, the amplification filtering unit connects the 4-20mA signal output unit, and power subsystem adopts the linear switch power supply to be the power supply of this transmitter; Described isolation conversion computing unit comprises that signal isolating amplifier circuit, current signal phase-shift circuit, d type flip flop circuit, divider circuit and time cuts apart multiplying operational circuit; Described amplification filtering unit comprises signals reverse amplifying circuit and step low-pass Butterworth filter circuit; Described 4-20mA signal output unit comprises zero adjustment circuit, full scale regulating circuit and 4-20mA output driving circuit; Measure the signal of telecommunication and insert isolating amplifier circuit, the current signal after the isolation inserts the d type flip flop circuit after the phase shift of electric current phase-shift circuit, and the d type flip flop circuit is exported control signal respectively and cut apart multiplying operational circuit in divider circuit, time and carry out computing; The computing output signal inserts step low-pass Butterworth filter circuit filtering after the signals reverse amplifying circuit is reverse, the signal of exporting after the filtering is control 4-20mA output driving circuit behind zero adjustment circuit and full scale regulating circuit successively.
2. a kind of three-phase activity coefficient transmitter as claimed in claim 1 is characterized in that: its input signal of three-phase activity coefficient transmitter is isolated withstand voltage more than 3000V to output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202545988U CN203219173U (en) | 2013-05-13 | 2013-05-13 | Three-phase power factor transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202545988U CN203219173U (en) | 2013-05-13 | 2013-05-13 | Three-phase power factor transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203219173U true CN203219173U (en) | 2013-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202545988U Expired - Fee Related CN203219173U (en) | 2013-05-13 | 2013-05-13 | Three-phase power factor transmitter |
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| Country | Link |
|---|---|
| CN (1) | CN203219173U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921796A (en) * | 2017-12-13 | 2019-06-21 | 林项武 | A kind of circuit that the electric signal of mechanical periodicity is converted to direct current signal level |
| CN115328256A (en) * | 2022-09-13 | 2022-11-11 | 国网安徽省电力有限公司六安供电公司 | Three-phase four-wire system APF direct current bus voltage pulsation influence suppression method |
-
2013
- 2013-05-13 CN CN2013202545988U patent/CN203219173U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921796A (en) * | 2017-12-13 | 2019-06-21 | 林项武 | A kind of circuit that the electric signal of mechanical periodicity is converted to direct current signal level |
| CN115328256A (en) * | 2022-09-13 | 2022-11-11 | 国网安徽省电力有限公司六安供电公司 | Three-phase four-wire system APF direct current bus voltage pulsation influence suppression method |
| CN115328256B (en) * | 2022-09-13 | 2023-11-07 | 国网安徽省电力有限公司六安供电公司 | Three-phase four-wire APF direct current bus voltage pulsation influence inhibition method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130925 Termination date: 20140513 |