CN1053842A - Transducer for true effective value of electric energy - Google Patents
Transducer for true effective value of electric energy Download PDFInfo
- Publication number
- CN1053842A CN1053842A CN 91101735 CN91101735A CN1053842A CN 1053842 A CN1053842 A CN 1053842A CN 91101735 CN91101735 CN 91101735 CN 91101735 A CN91101735 A CN 91101735A CN 1053842 A CN1053842 A CN 1053842A
- Authority
- CN
- China
- Prior art keywords
- signal
- effective value
- true
- input
- standard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
A kind of transducer for true effective value of electric energy, by the Signal Spacing input media, true rms value convertor device, the level treating apparatus of reforming, chromacoder is formed.The sine or the nonsinusoidal signal of input are transformed into the voltage or the current signal of proportional standard with it, are used for carrying out detection, the control and adjusting or the like of the signal of voltage, electric current to various automated systems and various other electricity that can convert this class signal to or non-electricity.
Description
The present invention is a kind of transducer for true effective value of electric energy, is used for various automated systems and makes electrical transformation usefulness.
All kinds of electric parameters transducers of using nearly all are that output is proportional to the standard signal of input signal mean value at present, and only limit to simple sinusoidal alternating current or voltage, carry out scale with effective value.This situation for present various thyristors and other on-off element widespread use is difficult to adapt to.Usually need in the various Industry Control effective value is controlled and detected, thereby the electric parameters transducer that produces the standard output signals be proportional to the input signal effective value is indispensable.As Signal Spacing input, for sinusoidal ac signal, usually applied voltage mutual inductor or current transformer, but for direct current signal or contain the DC component nonsinusoidal signal and other non-sinusoidal AC signal, inapplicable.
The objective of the invention is to propose a kind of transducer for true effective value of electric energy that can produce the standard output signals that is proportional to the input signal effective value, and provide and be applicable to two kinds on the imported and direct current of AC sine signal, the nonsinusoidal signal that contains DC component and other non-sinusoidal AC signal type, the latter also is applicable to sinusoidal ac signal.
The transducer for true effective value of electric energy of being realized according to the present invention, its characteristics are: it comprises by current transformer (offset of sinusoidal alternating current input signal) or voltage transformer (VT) (offset of sinusoidal ac voltage signal) or isolated amplifier (as AD
202/ AD
204) (to other signal except that sinusoidal letter), in order to realize to the isolation of input signal and the voltage that input signal is become suitable true rms value convertor device dynamic range, send into the true rms value convertor device, export a DC level that is proportional to the input signal effective value, after the processing of reforming, again according to the control requirement, output is proportional to the voltage signal of input signal effective value or current signal, and (when input signal was zero, output signal can be zero.Also can be certain certain value, as (V or 4mA).
Fig. 1 is a functional-block diagram of the present invention.
Fig. 2 is a kind of sinusoidal current input of the transducer for true effective value of electric energy realized according to the present invention, the circuit theory diagrams of 4～20mA output.
In the theory diagram of the present invention shown in Figure 1, be used for isolating and input signal being become the Signal Spacing input media of suitable true rms value convertor device dynamic range, concerning most of automated systems, it is connected in the voltage transformer (VT) of standard, and secondary (0～100V) afterwards, or the current transformer of standard is secondary, and (0～5A) afterwards, under above-mentioned two kinds of situations, the Signal Spacing input media is by the load R that is connected and fixed
1Small-sized voltage transformer (VT) (PT) or small current mutual inductor (CT sees Fig. 2) constitute.Be parallel to the voltage-stable transistor DW of the differential concatenation of output terminal
1, DW
2The input end that is used to protect the next stage circuit not reason signal is excessive and damage.To the non-sinusoidal input signal, it is by resistor network and isolated amplifier (AD for example
202/ AD
204Deng) constitute.Be connected in Signal Spacing input media true rms value convertor device afterwards and adopt effective value conversion integrated circuit AD
536A, it partly is made up of absolute value, root mean square, current mirror, impact damper etc., and its output is proportional to the effective value of input signal.True rms value convertor device and input, output signal have nothing to do, to various all general (circuit structure is seen Fig. 2 appropriate section).For the required level of adaptation signal translation circuit, between true rms value convertor device and chromacoder, be provided with the level treating apparatus of reforming, by 1/2MC
14558Integrated operational amplifier constitutes (circuit structure is seen Fig. 2 appropriate section), also to various general, just works as output signal not simultaneously, the resistance parameter difference.It is then different because of the difference of output signal to be positioned at output terminal chromacoder before.Shown in Figure 2, by 1/2MC
14558And the BG transistor chromacoder formed, be that output signal is 4～20mA type.To the current-output type of other parameter, or the component parameters difference, or circuit is variant slightly, and (as being input as zero output also is zero output signal, no DW
3, W
3, R
9That part of circuit).To the voltage output type, BG transistor relevant portion circuit is variant slightly in the circuit.
The transducer for true effective value of electric energy that the present invention constituted can provide and be better than 0.2% precision, and size is little, and cost is lower.
Claims (3)
1, a kind of transducer for true effective value of electric energy, comprising:
-Signal Spacing input media is used for the isolation input of realization to interchange or direct current (comprising that the non-sinusoidal that contains DC component exchanges) signal, and it is transformed into the standard volume that is fit to true rms value convertor;
-true rms value convertor device, it is connected after the Signal Spacing input media, is used for the input signal that is transformed into standard volume is carried out true rms value convertor output and the proportional DC level of input signal effective value:
--the level treating apparatus of reforming, it is connected after the real effective changing device, to the processing of reforming of true rms value convertor device output level;
--chromacoder, it is connected level and reforms after the treating apparatus, the standard signal of reforming is transformed into the output signal (for example 4～20mA or 1～5V signal) of standard;
Its characteristics are that it comprises the device that interchange, direct current and all kinds of non-sinusoidal alternation input signal is carried out real effective sampling, conversion, can export the standard signal that is proportional to the input signal effective value, and precision is better than 0.2%.
2, the described transducer for true effective value of electric energy of claim 1, its characteristics are that wherein the Signal Spacing input media not only has ac-input type, and also have direct current imported, are applicable to various sines, non-sinusoidal input signal.
3, the described transducer for true effective value of electric energy of claim 1, its characteristics are, because it comprises a true rms value convertor device, direct current, simple alternating current and various non-sinusoidal input signal can be transformed into and the proportional standard output signals of its effective value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101735 CN1053842A (en) | 1991-03-26 | 1991-03-26 | Transducer for true effective value of electric energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101735 CN1053842A (en) | 1991-03-26 | 1991-03-26 | Transducer for true effective value of electric energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1053842A true CN1053842A (en) | 1991-08-14 |
Family
ID=4905235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91101735 Pending CN1053842A (en) | 1991-03-26 | 1991-03-26 | Transducer for true effective value of electric energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053842A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806825A (en) * | 2010-03-12 | 2010-08-18 | 上海电机学院 | Method and system for measuring effective value of electric parameter of electric motor powered up by frequency converter |
| CN104502673A (en) * | 2014-11-13 | 2015-04-08 | 浙江涵普电力科技有限公司 | AC-DC general current true RMS transmitter |
| CN104515898A (en) * | 2014-11-13 | 2015-04-15 | 浙江涵普电力科技有限公司 | Alternating current and direct current universal real-available-value voltage transmitter |
| CN104714587A (en) * | 2015-01-05 | 2015-06-17 | 湖南工业大学 | Device for obtaining transmitter current average value |
-
1991
- 1991-03-26 CN CN 91101735 patent/CN1053842A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806825A (en) * | 2010-03-12 | 2010-08-18 | 上海电机学院 | Method and system for measuring effective value of electric parameter of electric motor powered up by frequency converter |
| CN101806825B (en) * | 2010-03-12 | 2012-07-04 | 上海电机学院 | Method and system for measuring effective value of electric parameter of electric motor powered up by frequency converter |
| CN104502673A (en) * | 2014-11-13 | 2015-04-08 | 浙江涵普电力科技有限公司 | AC-DC general current true RMS transmitter |
| CN104515898A (en) * | 2014-11-13 | 2015-04-15 | 浙江涵普电力科技有限公司 | Alternating current and direct current universal real-available-value voltage transmitter |
| CN104502673B (en) * | 2014-11-13 | 2017-07-14 | 浙江涵普电力科技有限公司 | The current true virtual value transmitter of AC/DC universal |
| CN104714587A (en) * | 2015-01-05 | 2015-06-17 | 湖南工业大学 | Device for obtaining transmitter current average value |
| CN104714587B (en) * | 2015-01-05 | 2016-11-23 | 湖南工业大学 | A kind of device seeking transmitter current average |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Funato et al. | Realization of negative inductance using variable active-passive reactance (VAPAR) | |
| CN203658454U (en) | Power quality disturbance detecting apparatus | |
| CN1053842A (en) | Transducer for true effective value of electric energy | |
| CN210037911U (en) | RLC load box | |
| Jianyu et al. | A novel resonant network for a WPT system with constant output voltage | |
| CN201285409Y (en) | Phase voltage detection circuit | |
| CN201017252Y (en) | High precision controllable electric power | |
| CN206725670U (en) | Detection means for filter capacitor in PLC module | |
| Holenarsipur et al. | Avoiding the use of negative inductances and resistances in modeling three-winding transformers for computer simulations | |
| EP0790689A3 (en) | Method for the improvement of the voltage quality in an AC network and apparatus for implementing this method | |
| CN212163183U (en) | Adjustable DC power supply device | |
| Fuchs et al. | Measurement of harmonic losses of pole transformers and single-phase induction motors | |
| CN213423275U (en) | Debugging system of variable frequency power supply control cabinet | |
| CN210347686U (en) | Constant voltage direct current load | |
| CN2192040Y (en) | Precise quick measuring ohmmeter for testing direct impedance of wide measuring range transformer | |
| CN1133508A (en) | Switch type power source with protective circuit | |
| CN211180029U (en) | Frequency converter detection device and frequency conversion system | |
| CN207541145U (en) | Isolated busbar voltage detection circuit | |
| CN211905496U (en) | High-isolation voltage-resistant alternating-current voltage sensor | |
| CN2588378Y (en) | AC/dc source and drainage carrent free transducer | |
| CN207475492U (en) | High pressure power amplification system | |
| CN211603306U (en) | Isolation transmitter | |
| Penin et al. | Determination of one valued characteristics of power-source and power-load elements | |
| CN212060524U (en) | High-voltage capacitor load box | |
| US6597591B2 (en) | Transformerless AC/DC converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |