CN201017252Y - High precision controllable electric power - Google Patents
High precision controllable electric power Download PDFInfo
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- CN201017252Y CN201017252Y CNU2006200311919U CN200620031191U CN201017252Y CN 201017252 Y CN201017252 Y CN 201017252Y CN U2006200311919 U CNU2006200311919 U CN U2006200311919U CN 200620031191 U CN200620031191 U CN 200620031191U CN 201017252 Y CN201017252 Y CN 201017252Y
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- voltage
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- power
- high precision
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Abstract
The utility model provides a controllable electrical source with a high precision which consists of a subtraction circuit, a voltage amplifier circuit, a power amplifier circuit, an isolating circuit, an output sampling feedback circuit and an electrical source circuit which converts an alternating current source into a direct current source to supply power for the subtraction circuit, the voltage amplifier circuit, the power amplifier circuit and the isolating circuit to work. The subtraction circuit makes a difference operation towards control signals and the signals, which are output by the output sampling feedback circuit and then sends to the voltage amplifier circuit and the power amplifier circuit for a voltage amplification and a power amplification. The isolating circuit is connected with an input end of an output end. The output sampling feedback circuit samples the voltage or current signal, which is output by the electrical source and sends to one input end of the subtraction circuit. Towards a controllable electrical voltage source, the output sampling feedback circuit consists of a voltage-division of the precision resistance; towards a controllable electrical current source, the output sampling feedback circuit (V) consists of precision sampling resistance.
Description
Technical field
The utility model can be used for electronic equipment and power measurement field, relates to the controlled AC power of a kind of precision.
Background technology
In the power measurement field; novel photo-electric or electronic type voltage; current transformer becomes many research institutions; the research focus of manufacturer; and the example of many hanging net operations arranged; photo-electric that these are novel or electronic type voltage; current transformer provides a digital interface and an analog interface usually; digital interface can be used for transformer station's digitizing engineering; analog interface provides a low-voltage; miniwatt output signal interface; this analog signal voltage is usually less than 5V; if this analog interface does not have practical significance without voltage and power amplification; because traditional metering of transformer station; measure; protection; the analog interface of automated system all is 100V (voltage interface) or 1A/5A (current interface); and the interface power demand is big (common several volt-amperes to tens volt-amperes); therefore; also do not realize under the situation of total digitalization fully in transformer station; press for a kind of analog control signal that photoelectricity or electronic mutual inductor are provided and change the high precision controllable electric power that 100V (voltage interface) or 1A/5A (current interface) can be provided into; be used to realize photoelectricity or electronic mutual inductor and traditional metering; measure; protection; the high precision interface of automated system does not also have a kind of so high-precision interfacing equipment at present.
Therefore, up to the present, also do not realize the controllable electric power equipment of the fine interface of traditional analog interfacing equipment of photoelectricity or electronic mutual inductor and transformer station, the utility model can address this problem.
The utility model content
The purpose of this utility model provides the controlled AC power of a kind of high intensive reading, promptly a kind of driving power of realizing the traditional analog interfacing equipment interface of photoelectricity or electronic mutual inductor and transformer station.
For achieving the above object, the utility model adopts following technical scheme: a kind of high precision controllable electric power, by subtraction circuit (I), voltage amplifier circuit (II), power amplification circuit (III), buffer circuit (IV), export sampling feedback circuit (V) and be used for that AC power is converted to direct supply and supply subtraction circuit (I), voltage amplifier circuit (II), power amplification circuit (III), the power circuit (VI) of buffer circuit (IV) work is formed, subtraction circuit is asked difference operation with control signal and output sampling feedback circuit (V) output signal, send into voltage amplifier circuit (II) then and carry out voltage and power amplification with power amplification circuit (III), buffer circuit (IV) is connected input end or output terminal, and output sampling feedback circuit (V) is sent into an input end of subtraction circuit after with the voltage of power supply output or current signal sampling.
For controllable voltage source, its output sampling feedback circuit (V) is made up of the precision resistance dividing potential drop.
For controllable current source, its output sampling feedback circuit (V) is made up of accurate sample resistance.
Its buffer circuit (IV) is made up of isolating transformer or isolation operational amplifier.
Its subtraction circuit (I), voltage amplifier circuit (II) are realized by integrated operational amplifier.
Its voltage amplifier circuit (II) and power amplification circuit (III) also can be carried out voltage amplification and realized by integrated amplifier or complementary symmetrical power amplification circuit when carrying out power amplification.
Compared with prior art, advantage of the present utility model is:
1, high precision controllable electric power of the present utility model adopts the output sampling, ask the form of poor FEEDBACK CONTROL with input control signal, with the accuracy of raising output voltage, and adopt the power supply of output signal feedback controling mode to be used for direct supply at present more, do not have the precedent that adopts in the AC power.
2, the high precision controllable electric power of the present utility model mode that adopts precision resistance dividing potential drop or precision resistance sampling to be reducing the sample circuit error, thereby improves the precision of power supply.
3, high precision controllable electric power of the present utility model improves the output error of controllable electric power for the precision that improves power supply adopts the method that voltage amplification factor is obtained especially greatly (hundreds of thousands doubly usually), thereby makes power supply reach high control accuracy.
Description of drawings
Fig. 1 is the theory of constitution block diagram of high precision controllable voltage source of the present utility model;
Fig. 2 is the theory of constitution block diagram of high precision controllable current source of the present utility model;
Fig. 3 is that the power supply circuit of high precision controllable electric power of the present utility model is formed;
Embodiment
The theory of constitution block diagram of high precision controllable voltage source of the present utility model as shown in Figure 1, in subtraction circuit (I), carry out the signal subtraction computing from the control signal voltage uc of control end and from the output feedback signal of exporting sampling feedback circuit (V), send in the voltage amplifier circuit (II) after the difference signal of gained isolated and carry out voltage amplification, voltage difference signal after the amplification is sent in the power amplification circuit (III) again and is carried out power amplification, signal after the power amplification directly drives load behind buffer circuit (IV), output sampling feedback circuit (V) is made up of the precision resistance dividing potential drop, to reduce sampling error, buffer circuit after the power amplification (IV) is generally realized by isolating transformer, the isolation of subtraction circuit (I) back signal realizes by isolating operational amplifier usually, in isolating operational amplifier, can realize the subtraction of signal simultaneously, Signal Spacing, voltage amplification, the buffer circuit (IV) after buffer circuit of input end (IV) and the power amplification can only be isolated at input end according to actual conditions, only isolate at output terminal, two ends isolate simultaneously or two ends do not isolate.Voltage amplifier circuit and power amplification circuit also can carry out voltage amplification by integrated power amplifier in power amplification realizes.When this high precision controllable voltage source during as the traditional analog machine driving interface of electronic type voltage transformer and transformer station, its specified output phase voltage is
The theory of constitution block diagram of high precision controllable current source of the present utility model as shown in Figure 2, in subtraction circuit (I), carry out the signal subtraction computing from control signal (the being generally voltage) uc of control end and from the output feedback signal (normally utilizing precision resistance that output current signal is converted to voltage signal) of exporting sampling feedback circuit (V), send in the voltage amplifier circuit (II) after the difference signal of gained isolated and carry out voltage amplification, voltage difference signal after the amplification is sent in the power amplification circuit (III) again and is carried out power amplification, signal after the power amplification is through buffer circuit (IV) rear drive load, output sampling feedback circuit (V) is made up of precision resistance, to reduce sampling error, this precision resistance is connected with the output load circuit, buffer circuit after the power amplification (IV) is generally realized by isolating transformer, the isolation of subtraction circuit (I) back signal realizes by isolating operational amplifier usually, in isolating operational amplifier, can realize the subtraction of signal simultaneously, Signal Spacing, voltage amplification, the buffer circuit (IV) after buffer circuit of input end (IV) and the power amplification can only be isolated at input end according to actual conditions, only isolate at output terminal, two ends isolate simultaneously or two ends do not isolate.Voltage amplifier circuit and power amplification circuit also can carry out voltage amplification by integrated power amplifier in power amplification realizes.When this high precision controllable current source during as the traditional analog machine driving interface of electronic current mutual inductor and transformer station, its output-current rating is 1A or 5A.
As shown in Figure 3, power supply circuit (VI) is taken from the single-phase 220V AC power of transformer station, divide two-way output behind the output transformer through having two secondary coils, the output of every road again through connect behind full-wave rectification, the capacitor filtering model be 78XX as 7805,7815,7824 (IC5, IC7) and the integrated stable voltage circuit of 79XX as 7905,7915,7924 (IC6, IC8), be used to supply with the positive and negative direct supply of subtraction circuit (I), voltage amplifier circuit (II), power amplification circuit (III), buffer circuit (IV) work by integrated stable voltage circuit output.
Claims (5)
1. high precision controllable electric power, it is characterized in that, it is by subtraction circuit (I), voltage amplifier circuit (II), power amplification circuit (III), buffer circuit (IV), export sampling feedback circuit (V) and be used for that AC power is converted to direct supply and supply subtraction circuit, voltage amplifier circuit, power amplification circuit, the power circuit of buffer circuit work (VI) is formed, subtraction circuit is asked difference operation with control signal and output sampling feedback circuit output signal, send into voltage amplifier circuit and power amplification circuit then and carry out voltage and power amplification, buffer circuit (IV) is connected input end or output terminal, and output sampling feedback circuit (V) is sent into an input end of subtraction circuit after with the voltage of power supply output or current signal sampling.
2. high precision controllable electric power as claimed in claim 1 is characterized in that, its output sampling feedback circuit (V) is made up of the precision resistance dividing potential drop, is used for output voltage is taken a sample.
3. high precision controllable electric power as claimed in claim 1 is characterized in that, its output sampling feedback circuit (V) is made up of accurate sample resistance, is used for output current is taken a sample.
4. high precision controllable electric power as claimed in claim 1 is characterized in that, its buffer circuit (IV) is made up of isolating transformer or isolation operational amplifier.
5. high precision controllable electric power as claimed in claim 1 is characterized in that, its power amplification circuit (III) adopts integrated power amplifier to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200311919U CN201017252Y (en) | 2006-08-24 | 2006-08-24 | High precision controllable electric power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200311919U CN201017252Y (en) | 2006-08-24 | 2006-08-24 | High precision controllable electric power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201017252Y true CN201017252Y (en) | 2008-02-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200311919U Expired - Fee Related CN201017252Y (en) | 2006-08-24 | 2006-08-24 | High precision controllable electric power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201017252Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832824A (en) * | 2012-08-07 | 2012-12-19 | 北京金自天正智能控制股份有限公司 | Medium-small power high-precision high-frequency sine wave alternating current power supply |
| CN102841227A (en) * | 2012-08-15 | 2012-12-26 | 广东电网公司电力科学研究院 | High precision large alternating current output device |
| CN103399603A (en) * | 2013-08-22 | 2013-11-20 | 北京康威电子技术有限公司 | Closed-loop feedback loop system used for surgical electrotome |
| CN104216449A (en) * | 2014-09-12 | 2014-12-17 | 成都威邦科技有限公司 | Controllable alternating-current stabilized-voltage power supply |
-
2006
- 2006-08-24 CN CNU2006200311919U patent/CN201017252Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832824A (en) * | 2012-08-07 | 2012-12-19 | 北京金自天正智能控制股份有限公司 | Medium-small power high-precision high-frequency sine wave alternating current power supply |
| CN102832824B (en) * | 2012-08-07 | 2014-11-19 | 北京金自天正智能控制股份有限公司 | Medium-small power high-precision high-frequency sine wave alternating current power supply |
| CN102841227A (en) * | 2012-08-15 | 2012-12-26 | 广东电网公司电力科学研究院 | High precision large alternating current output device |
| CN102841227B (en) * | 2012-08-15 | 2015-02-11 | 广东电网公司电力科学研究院 | High precision large alternating current output device |
| CN103399603A (en) * | 2013-08-22 | 2013-11-20 | 北京康威电子技术有限公司 | Closed-loop feedback loop system used for surgical electrotome |
| CN104216449A (en) * | 2014-09-12 | 2014-12-17 | 成都威邦科技有限公司 | Controllable alternating-current stabilized-voltage power supply |
| CN104216449B (en) * | 2014-09-12 | 2016-01-13 | 国网新疆电力公司博尔塔拉供电公司 | A kind of controllability alternating current steady voltage plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |