CN203204068U - Three phase active power transmitter - Google Patents
Three phase active power transmitter Download PDFInfo
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- CN203204068U CN203204068U CN 201320254600 CN201320254600U CN203204068U CN 203204068 U CN203204068 U CN 203204068U CN 201320254600 CN201320254600 CN 201320254600 CN 201320254600 U CN201320254600 U CN 201320254600U CN 203204068 U CN203204068 U CN 203204068U
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Abstract
The utility model relates to a three phase active power transmitter, wherein an isolating and calculating unit is connected with an amplifying and wave-filtering unit which is connected with a 4-20mA signal output unit, and a linear power source is adopted for supply electricity for the transmitter by a power source unit. The isolating and calculating unit comprises a signal isolating circuit, a circuit for converting voltage signals to square waves through voltage multiplication, and a time division multiplication operation circuit. The amplifying and wave-filtering unit comprises a signal reverse direction amplification circuit and a second order low-pass Butterworth wave filter circuit. The 4-20mA signal output unit comprises a zero point, a full-scale adjusting circuit, and a 4-20mA outputting and driving circuit. The three phase active power transmitter is an instrument capable of converting detected active power into a direct current on the spot and the direct current is isolated from input signals. The three phase active power transmitter is advantageous in that the input signals are isolated from output signals and can withstand voltage above 3000V, the input signals of the three phase active power transmitter can be effectively prevented from entering high voltage, and terminal operation personnel and equipment can be prevented from being harmed.
Description
Technical field
The utility model relates to signal isolation switch technology field, is specifically related to a kind of three phases active power transmitter.
Background technology
Transmitter is that the signal of multi-form kind is converted to the DC analogue quantity electric signal 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.
The three phases active power transmitter is on the spot the instrument that tested active power is converted to the DC current of mutually isolating with input signal, and can reflect measured power transmission direction in the line, improve transmission course antijamming capability and 4-20mA electric current and be the essential safe type signal inflammable gass such as gas that are not enough to ignite, 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 pulpit or display device.Can be widely used in the electric device of the 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 phases active power transmitter, but 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 phases active power transmitter, comprise housing, power supply unit, isolation computing unit, amplification filtering unit, 4-20mA signal output unit, the isolation computing unit connects the amplification filtering unit, the amplification filtering unit connects the 4-20mA signal output unit, and power supply unit adopts the linear switch power supply to be the power supply of this transmitter; Described isolation computing unit comprises that signal isolation circuit, voltage signal frequency multiplication turn circuit and square-wave and time division multiplying operational circuit, measuring-signal access buffer circuit, the voltage signal after the buffer circuit output isolation turns circuit and square-wave conversion and control time division multiplying operational circuit through the voltage signal frequency multiplication; Described amplification filtering unit comprises signals reverse amplifying circuit and step low-pass Butterworth filter circuit; The signal that the time division multiplying operational circuit calculates output is connected to step low-pass Butterworth filter circuit through reverse amplification circuit; Described 4-20mA signal output unit comprises zero point, full scale regulating circuit and 4-20mA output driving circuit, and filtered signal is sent into the 4-20mA output driving circuit through zero point, full scale regulating circuit.
The utility model also has following feature: aforesaid three phases active power transmitter, its input signal is isolated more than the withstand voltage 3000V output signal.
The beneficial effects of the utility model have:
On the spot the instrument that tested active power is converted to the DC current of mutually isolating with input signal, and can reflect measured power transmission direction in the line, improve transmission course antijamming capability and 4-20mA electric current and be the essential safe type signal inflammable gass such as gas that are not enough to ignite, 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 pulpit or display device.Input signal 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, 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 isolation computing unit schematic diagram of the present utility model;
Fig. 4 is amplification filtering of the present utility model unit schematic diagram;
Fig. 5 is 4-20mA output driving circuit schematic diagram of the present utility model;
Wherein, 1, isolation computing unit, 2, amplification filtering unit, 3, the 4-20mA signal output unit, 4, signal isolation circuit, 5, the voltage signal frequency multiplication turns circuit and square-wave, 6, time division multiplying operational circuit, 7, the signals reverse amplifying circuit, 8, step low-pass Butterworth filter circuit, 9, zero point, full scale regulating circuit, 10, 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-211/231 type three phases active power transmitter, comprise housing, power supply unit, isolation computing unit, amplification filtering unit, 4-20mA signal output unit, the isolation computing unit connects the amplification filtering unit, the amplification filtering unit connects the 4-20mA signal output unit, and power supply unit adopts the linear switch power supply to be the power supply of this transmitter; Described isolation computing unit comprises that signal isolation circuit, voltage signal frequency multiplication turn circuit and square-wave and time division multiplying operational circuit, measuring-signal access buffer circuit, the voltage signal after the buffer circuit output isolation turns circuit and square-wave conversion and control time division multiplying operational circuit through the voltage signal frequency multiplication; Described amplification filtering unit comprises signals reverse amplifying circuit and step low-pass Butterworth filter circuit; The signal that the time division multiplying operational circuit calculates output is connected to step low-pass Butterworth filter circuit through reverse amplification circuit; Described 4-20mA signal output unit comprises zero point, full scale regulating circuit and 4-20mA output driving circuit, and filtered signal is sent into the 4-20mA output driving circuit through zero point, full scale regulating circuit.Described its input signal of three phases active power 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, and prevent from terminal operation personnel and equipment are worked the mischief and DCS system and the automatic control system of stable, reliable 4-20mA signal to the generating plant are provided.Tested active power is converted to the instrument of the DC current of mutually isolating with input signal, and can reflect measured power transmission direction in the line, improve transmission course antijamming capability and 4-20mA electric current and be the essential safe type signal inflammable gass such as gas that are not enough to ignite, 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 pulpit or display device.
1, housing: consisted of by fire-retardant black ABS plastic, be divided into loam cake, guide rail buckle, case cover composition.
2, power supply unit: adopt the linear switch Power supply, guarantee the stable and reliable of system power supply, improve system accuracy.
3, isolation computing unit: the voltage that is converted active power, current signal accessed respectively voltage transformer (VT) is elementary, current transformer is elementary, the voltage transformer (VT) secondary signal changes square-wave signal into by phase shift self-maintained circuit frequency multiplication dress, and square-wave signal is cut apart multiplying operational circuit by control simulation switch cutting current mutual inductor secondary signal makeup time.
4, amplification filtering unit: signal electric signal after reverse amplification circuit amplifies of cutting apart multiplying operational circuit output enters step low-pass Butterworth filter circuit, and the filtering high-frequency interferencing signal also changes AC signal into d. c. voltage signal.
5,4-20mA signal output unit: receive the d. c. voltage signal of amplification filtering unit output, drive the 4-20mA output circuit, output 4-20mA electric current.
6, its input signal of three phases active power 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 provide stable, reliable 4-20mA signal to DCS system and automatic control system.
Three phases active power transmitter job step is as follows:
The voltage that is converted active power, it is elementary that current signal accesses respectively voltage transformer (VT), current transformer is elementary, the voltage transformer (VT) secondary signal changes square-wave signal into by phase shift self-maintained circuit frequency multiplication dress, square-wave signal is cut apart multiplying operational circuit by control simulation switch cutting current mutual inductor secondary signal makeup time, the signal of time division multiplying operational circuit output electric signal after reverse amplification circuit amplifies enters step low-pass Butterworth filter circuit (such as Fig. 3), the filtering high-frequency interferencing signal also changes AC signal into d. c. voltage signal, drive 4-20mA output circuit (such as Fig. 4), output 4-20mA electric current.
The beneficial effects of the utility model have:
1, the utility model is a kind of three phases active power transmitter, on the spot the instrument that tested active power is converted to the DC current of mutually isolating with input signal, and can reflect measured power transmission direction in the line, improve transmission course antijamming capability and 4-20mA electric current and be the essential safe type signal inflammable gass such as gas that are not enough to ignite, 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 pulpit or display device.
2, its input signal 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, and prevent from terminal operation personnel and equipment are worked the mischief.
Claims (2)
1. three phases active power transmitter, comprise housing, power supply unit, isolation computing unit, amplification filtering unit, 4-20mA signal output unit, it is characterized in that: the isolation computing unit connects the amplification filtering unit, the amplification filtering unit connects the 4-20mA signal output unit, and power supply unit adopts the linear switch power supply to be the power supply of this transmitter; Described isolation computing unit comprises that signal isolation circuit, voltage signal frequency multiplication turn circuit and square-wave and time division multiplying operational circuit, measuring-signal access buffer circuit, the voltage signal after the buffer circuit output isolation turns circuit and square-wave conversion and control time division multiplying operational circuit through the voltage signal frequency multiplication; Described amplification filtering unit comprises signals reverse amplifying circuit and step low-pass Butterworth filter circuit; The signal that the time division multiplying operational circuit calculates output is connected to step low-pass Butterworth filter circuit through reverse amplification circuit; Described 4-20mA signal output unit comprises zero point, full scale regulating circuit and 4-20mA output driving circuit, and filtered signal is sent into the 4-20mA output driving circuit through zero point, full scale regulating circuit.
2. a kind of three phases active power transmitter as claimed in claim 1, it is characterized in that: its input signal is isolated more than the withstand voltage 3000V output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320254600 CN203204068U (en) | 2013-05-13 | 2013-05-13 | Three phase active power transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320254600 CN203204068U (en) | 2013-05-13 | 2013-05-13 | Three phase active power transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203204068U true CN203204068U (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320254600 Expired - Fee Related CN203204068U (en) | 2013-05-13 | 2013-05-13 | Three phase active power transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203204068U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469775A (en) * | 2018-06-29 | 2018-08-31 | 赵明 | One kind 4 ~ 20mA signal isolation circuits and multifunctional isolating transmitter |
-
2013
- 2013-05-13 CN CN 201320254600 patent/CN203204068U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469775A (en) * | 2018-06-29 | 2018-08-31 | 赵明 | One kind 4 ~ 20mA signal isolation circuits and multifunctional isolating transmitter |
| CN108469775B (en) * | 2018-06-29 | 2023-11-28 | 赵明 | 4-20 mA signal isolation circuit and multifunctional isolation transmitter |
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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: 20130918 Termination date: 20140513 |