CN103023439A - Power amplifying system for intelligent substation test system - Google Patents
Power amplifying system for intelligent substation test system Download PDFInfo
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- CN103023439A CN103023439A CN201210546101XA CN201210546101A CN103023439A CN 103023439 A CN103023439 A CN 103023439A CN 201210546101X A CN201210546101X A CN 201210546101XA CN 201210546101 A CN201210546101 A CN 201210546101A CN 103023439 A CN103023439 A CN 103023439A
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Abstract
The invention discloses a power amplifying system for an intelligent substation test system. The power amplifying system can perform linear amplification on the input reference signal, the output power is large, and the requirements of the intelligent substation test system can be satisfied. The power amplifying system comprises an input end and an output end, wherein the input end is connected with an input stage module; the input stage module is connected with a central amplifying stage module through a relay J1; the relay J1 can connect and disconnect the central amplifying stage module and the input stage module under the action of a control signal; the central amplifying stage module is connected with a power output stage module; the power output stage module is connected with the output end through a sampling resistor RQ; and the sampling resistor RQ is further connected with the input stage module to form a current negative feedback network. The current magnitude output by the power amplifying system is decided by a closed ring formed by the sampling resistor and the input stage module.
Description
Technical field
The present invention relates to a kind of power amplifying system, and in particular to a kind of power amplifying system for intelligent substation test system.Belong to electricity field.
Background technology
Power amplification circuit is a kind of amplifying circuit for the purpose of exporting relatively high power.Its general direct drive load, load capacity is eager to excel.Power amplification circuit usually as multistage amplifier circuit output stage, in many electronic equipments, it is desirable to which the output stage of amplifying circuit can drive certain to load, such as drive instrument, make throw of pointer；Drive the speaker, is allowed to sounding；Or the executing agency in driving automatic control system etc..In a word, it is desirable to which amplifying circuit has sufficiently large power output.
Power amplification circuit will typically meet following conditions：
（1）Efficiency will height.Due to output power, therefore the power of dc source consumption is also big, and this there is an efficiency.So-called efficiency is exactly the ratio of the available signal power that load is obtained and the dc power of power supply supply.This ratio is bigger, it is meant that efficiency is higher.
（2）Non-linear distortion is small.Power amplification circuit is worked under big signal, so non-linear distortion is inevitably resulted from, and also same power tube power output is bigger, and non-linear distortion is often more serious, and this just makes power output and non-linear distortion turn into a pair of principal contradictions.But, under different occasions, the requirement to non-linear distortion is different, for example, in test system and electroacoustic equipment, this problem seems important, and in the occasions such as industrial control system, then using power output as main purpose, the requirement to non-linear distortion is just reduced to peripheral issue.
（3）Radiating is few.In power amplification circuit, there is sizable power consumption on the collector junction of pipe, raise junction temperature and case temperature, in order to which the pipe for making full use of permission consumes and pipe is exported sufficiently large power, it is necessary to which the radiating of amplifying device is few.
Power amplifying system applied to intelligent substation test system is the core of intelligent substation test system, and it completes the power amplification to reference signal, drives protective relaying device, therefore it is required that output power, its power output is from 100VA to thousands of VA.
In recent years, the advantages of switch power amplifier is due to energy density height, small volume, is widely applied.But existing switch power amplifier harmonic components are high, non-linear distortion is big, and the signal of output is insufficient for the requirement of intelligent substation test system.
The content of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, a kind of power amplifying system for intelligent substation test system is provided, the power amplifying system can carry out linear amplification to the reference signal of input, the power of output simultaneously is big, disclosure satisfy that the requirement of intelligent substation test system.
To achieve the above object, the present invention uses following technical proposals：
A kind of power amplifying system for intelligent substation test system, including input and output end, the input connects input stage module, input stage module is connected by relay J1 with interstage amplifier section module, interstage amplifier section module is connected with power output stage module, power output stage module is connected by sample resistance RQ with output end, and the sample resistance RQ also is connected to form current negative feedback network with input stage module.
The power amplifying system also includes protection circuit, and the protection circuit is connected with power output stage module.
The input stage module includes operational amplifier U1, input stage resistance R1 ~ R5；Input stage resistance R1 one end is connected with the input, other end ground connection；Input stage resistance R2 one end is connected with the input, and the other end is connected with operational amplifier U1 inverting input；Input stage resistance R3 one end is connected with operational amplifier U1 inverting input, and the other end is connected with one end of the sample resistance RQ；Input stage resistance R4 one end is connected with operational amplifier U1 normal phase input end, and the other end is connected with the other end of the sample resistance RQ；Input stage resistance R5 one end is connected with operational amplifier U1 normal phase input end, other end ground connection.
The interstage amplifier section module is push-pull type structure for amplifying symmetrical above and below.
The interstage amplifier section module includes 13 intergrade resistance R6 ~ R18, two intergrade triode T1 and T2, two intergrade diode D1 ~ D2, five intergrade electric capacity C3 ~ C7；Intergrade resistance R6 one end is connected with the relay J1, other end ground connection；Intergrade resistance R7 one end is connected with the relay J1, and the other end is connected between intergrade diode D1 negative pole and intergrade diode D2 positive pole；Intergrade resistance R8, potentiometer R9, intergrade diode D1, intergrade diode D2, potentiometer R10, intergrade resistance R11 are sequentially connected in series, and are parallel to both ends of power；Intergrade triode T1 base stage is connected between the intergrade resistance R8 of series connection and potentiometer R9, and intergrade triode T1 colelctor electrode is connected with intergrade resistance R12, and intergrade triode T1 emitter stage is connected with intergrade resistance R13；Intergrade triode T2 base stage is connected between the intergrade resistance R11 of series connection and potentiometer R10, and intergrade triode T2 colelctor electrode is connected with intergrade resistance R15, and intergrade triode T2 emitter stage is connected with intergrade resistance R14；The first electric capacity of intergrade C3 is connected between intergrade triode T1 base stage and colelctor electrode, and intergrade electric capacity C4 is connected between intergrade triode T2 base stage and colelctor electrode；Intergrade resistance R16 one end connection intergrade triode T1 emitter stage, the other end is connected in series intergrade resistance R17, and intergrade resistance R17 is connected with intergrade triode T2 emitter stage；Intergrade electric capacity C5 one end connection intergrade triode T1 emitter stage, the other end is connected in series intergrade electric capacity C6, and intergrade electric capacity C6 is connected with intergrade triode T2 emitter stage；Intergrade electric capacity C7 one end is connected with intergrade resistance R18, other end ground connection；Intergrade resistance R18, intergrade resistance R16 and intergrade resistance R17, intergrade electric capacity C5 and intergrade electric capacity C6 and the sample resistance RQ are connected to the first node.
The power output stage module is push-pull type structure.
The power output stage module includes being parallel to four of both ends of power to pipe branch road, each pipe branch road is included being sequentially connected in series output stage resistance RK3 or output stage resistance RK4 or output stage resistance RK5 or output stage resistance RK6, to pipe T3 or to pipe T4 or to pipe T5 or to pipe T6, to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10 and output stage resistance RK7 or output stage resistance RK8 or output stage resistance RK9 or output stage resistance RK10；Emitter stage to pipe T3 or to pipe T4 or to pipe T5 or to pipe T6 is connected with output stage resistance RK3 or output stage resistance RK4 or output stage resistance RK5 or output stage resistance RK6, colelctor electrode to pipe T3 or to pipe T4 or to pipe T5 or to pipe T6 is connected with to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10 colelctor electrode, base stage connection corresponding with base resistance RA3 or base resistance RA4 or base resistance RA5 or base resistance RA6 one end respectively to pipe T3 or to pipe T4 or to pipe T5 or to pipe T6, base resistance RA3 or base resistance RA4 or base resistance RA5 or base resistance the RA6 other end are all connected to the colelctor electrode of the intergrade triode T1；Emitter stage to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10 is connected with output stage resistance RK7 or output stage resistance RK8 or output stage resistance RK9 or output stage resistance RK10, base stage connection corresponding with base resistance RA7 or base resistance RA8 or base resistance RA9 or base resistance RA10 one end respectively to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10, base resistance RA7 or base resistance RA8 or base resistance RA9 or base resistance the RA10 other end are all connected to the colelctor electrode of the intergrade triode T2；Described couple of pipe T3 or colelctor electrode to pipe T4 or to pipe T5 or to pipe T6 and first node is all connected to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10 colelctor electrode.
The power output stage module also includes output stage diode D3 ~ D4 that both ends of power is parallel to after two series aiding connections, and described two output stage diode D3 ~ D4 are opposite with intergrade diode D1 ~ D2 setting direction；Output stage diode D3 positive pole and output stage diode D4 negative pole are connected to first node.
The protection circuit includes the first protection circuit and the second protection circuit；
First protection circuit includes two protection circuit diode D5 ~ D6, protection circuit resistance R19, protection circuit resistance R20, protection circuit resistance R21 and the three protection circuit diode D7 ~ D9 being sequentially connected in series；Protection circuit diode D5 ~ D6 and protection circuit diode D7 ~ D9 setting direction are on the contrary, protection circuit diode D5 positive pole and the positive pole of power supply are connected, and protection circuit diode D9 positive pole is connected with the base stage of the triode of protection circuit first；Four protection circuit diode DA3 ~ DA6; its positive pole is all connected between protection circuit resistance R20 and protection circuit resistance R21, and its negative pole is connected to each output stage resistance RK3 or output stage resistance RK4 or output stage resistance RK5 or output stage resistance RK6 and to pipe T3 or to pipe T4 or to pipe T5 or between pipe T6 emitter stage；Protection circuit resistance R19 is connected in parallel to optocoupler G1；The emitter stage of protection circuit triode is connected with positive source, and the colelctor electrode of the triode of protection circuit first is connected with the colelctor electrode of the intergrade triode T1；
Second protection circuit includes two protection circuit diode D13 ~ D14, protection circuit resistance R24, protection circuit resistance R23, protection circuit resistance R22 and the three protection circuit diode D12 ~ D10 being sequentially connected in series; wherein protection circuit diode D14 ~ D13 is opposite with protection circuit diode D12 ~ D10 setting direction; diode D14 negative pole and the negative pole of power supply are connected, and diode D10 negative pole is connected with the base stage of second triode of protection circuit；Four protection circuit diode DA7 ~ DA10; its negative pole is all connected between protection circuit resistance R23 and protection circuit resistance R22, and its positive pole is connected to each output stage resistance RK7 or output stage resistance RK8 or output stage resistance RK9 or output stage resistance RK10 and to pipe T7 or to pipe T8 or to pipe T9 or between pipe T10 emitter stage；Protection circuit resistance R24 is parallel with optocoupler G2；The emitter stage of the triode of protection circuit second is connected with power cathode, and the colelctor electrode of the triode of protection circuit second is connected with the colelctor electrode of the intergrade triode T2.
The beneficial effects of the invention are as follows the power amplifying system is realized carries out linear amplification to the reference signal of input, while the power of output is big, meets the requirement of intelligent substation test system.
Brief description of the drawings
Fig. 1 is the structured flowchart of the present invention；
Fig. 2 is the circuit diagram of the present invention；
Fig. 3 is showing the current amplification circuit simplified principle figure of the present invention.
Embodiment
The present invention will be further elaborated with reference to the accompanying drawings and examples, it should explanation, and the description below is not merely to the explanation present invention, is defined to its content.
As shown in Figure 1, the present invention includes input and output end, input connects input stage module, and input stage module is connected by relay J1 with interstage amplifier section module, and relay J1 realizes the connection and disconnection of interstage amplifier section module and input stage module in the presence of control signal；Interstage amplifier section module is connected with power output stage module, power output stage module is connected by sample resistance RQ with output end, sample resistance RQ also is connected to form current negative feedback network with input stage module, and the size of current of power amplifying system output is determined by the closed loop of sample resistance and input stage module composition.
The power amplifying system also includes protection circuit, and the protection circuit is connected with power output stage module.
When power amplifying system does not work, signal input point is grounded by the normally closed node of relay；When power amplifying system works, the control signal sent by digital signal processor makes the actuating of relay, so that interstage amplifier section module is connected with input stage module.
As shown in Fig. 2 Vin represents input, Vout represents output end, and+Vcc and-Vcc represent the positive pole and negative pole of power supply respectively.From figure 2 it can be seen that in the input stage module of the present invention, input stage resistance R1 and input stage resistance R2 one end are connected with input Vin, input stage resistance R1 other end ground connection；The input stage resistance R2 other end is connected with operational amplifier U1 inverting input；Input stage resistance R3 one end is connected with operational amplifier U1 inverting input, and the other end is connected with sample resistance RQ one end；Input stage resistance R4 one end is connected with operational amplifier U1 normal phase input end, and the other end is connected with the sample resistance RQ other end；Input stage resistance R5 one end is connected with operational amplifier U1 normal phase input end, other end ground connection.
The interstage amplifier section module of the present invention includes：13 intergrade resistance R6 ~ R18, two intergrade triode T1 ~ T2, two intergrade diode D1 ~ D2, five intergrade electric capacity C3 ~ C7；It can be become apparent from from Fig. 2, the interstage amplifier section module is complementary push-pull type structure for amplifying symmetrical above and below.Intergrade resistance R6 one end is connected with the relay J1, other end ground connection；Intergrade resistance R7 one end is connected with the relay J1, and the other end is connected between intergrade diode D1 negative pole and intergrade diode D2 positive pole；Intergrade resistance R8, potentiometer R9, intergrade diode D1, intergrade diode D2, potentiometer R10, intergrade resistance R11 are sequentially connected in series, and are parallel to both ends of power；Intergrade triode T1 base stage is connected between the intergrade resistance R8 of series connection and potentiometer R9, and intergrade triode T1 colelctor electrode is connected with intergrade resistance R12, and intergrade triode T1 emitter stage is connected with intergrade resistance R13；Intergrade triode T2 base stage is connected between the intergrade resistance R11 of series connection and potentiometer R10, and intergrade triode T2 colelctor electrode is connected with intergrade resistance R15, and intergrade triode T2 emitter stage is connected with intergrade resistance R14；The first electric capacity of intergrade C3 is connected between intergrade triode T1 base stage and colelctor electrode, and intergrade electric capacity C4 is connected between intergrade triode T2 base stage and colelctor electrode；Intergrade resistance R16 one end connection intergrade triode T1 emitter stage, the other end is connected in series intergrade resistance R17, and intergrade resistance R17 is connected with intergrade triode T2 emitter stage；Intergrade electric capacity C5 one end connection intergrade triode T1 emitter stage, the other end is connected in series intergrade electric capacity C6, and intergrade electric capacity C6 is connected with intergrade triode T2 emitter stage；Intergrade electric capacity C7 one end is connected with intergrade resistance R18, other end ground connection；Intergrade resistance R18, intergrade resistance R16 and intergrade resistance R17, intergrade electric capacity C5 and intergrade electric capacity C6 and the sample resistance RQ are connected to the first node（That is Same Vertices）.
The power output stage module of the present invention is including being parallel to four of the both ends of power output stage resistance RK3 for including being sequentially connected in series to pipe branch road to pipe branch road, each of which（Or output stage resistance RK4, output stage resistance RK5, output stage resistance RK6）, to pipe T3（Or to pipe T4, to pipe T5, to pipe T6）, to pipe T7（Or to pipe T8, to pipe T9, to pipe T10）With output stage resistance RK7（Or output stage resistance RK8, output stage resistance RK9, output stage resistance RK10）, wherein to pipe T3（Or to pipe T4, to pipe T5, to pipe T6）Emitter stage and output stage resistance RK3（Or output stage resistance RK4, output stage resistance RK5, output stage resistance RK6）Connection, to pipe T3（Or to pipe T4, to pipe T5, to pipe T6）Colelctor electrode with to pipe T7（Or to pipe T8, to pipe T9, to pipe T10）Colelctor electrode connection, to pipe T3（Or to pipe T4, to pipe T5, to pipe T6）Base stage respectively with base resistance RA3（Or base resistance RA4, base resistance RA5, base resistance RA6）One end correspondence connect, each base resistance RA3 ~ RA6 other end is all connected to intergrade triode T1 colelctor electrode；To pipe T7（Or to pipe T8, to pipe T9, to pipe T10）Emitter stage and output stage resistance RK7（Or output stage resistance RK8, output stage resistance RK9, output stage resistance RK10）Connection, to pipe T7（Or to pipe T8, to pipe T9, to pipe T10）Base stage respectively with base resistance RA7（Or base resistance RA8, base resistance RA9, base resistance RA10）One end correspondence connect, each base resistance RA7, base resistance RA8, base resistance RA9 and base resistance the RA10 other end are all connected to the colelctor electrode of the intergrade triode T2；Output stage diode D3 ~ D4 of both ends of power is parallel to after two series aiding connections, output stage diode D3 ~ D4 is opposite with intergrade diode D1 ~ D2 setting direction；It is each that first node is all connected to pipe T3 ~ T6 colelctor electrode, the negative pole of each colelctor electrode, output stage diode D3 positive pole and output stage diode D4 to pipe T7 ~ T10.
The power amplifying system also has protection circuit, and protection circuit is also symmetrical structure, and protection circuit includes the first protection circuit and the second protection circuit, wherein：
First protection circuit includes two protection circuit diode D5 ~ D6, protection circuit resistance R19, protection circuit resistance R20, protection circuit resistance R21 and the three protection circuit diode D7 ~ D9 being sequentially connected in series；Protection circuit diode D5 ~ D6 and protection circuit diode D7 ~ D9 setting direction are on the contrary, protection circuit diode D5 positive pole and the positive pole+Vcc of power supply are connected, and protection circuit diode D9 positive pole is connected with the base stage of the triode of protection circuit first；Four protection circuit diode DA3 ~ DA6; its positive pole is all connected between protection circuit resistance R20 and protection circuit resistance R21, and its negative pole is connected to each output stage resistance RK3 or output stage resistance RK4 or output stage resistance RK5 or output stage resistance RK6 and to pipe T3 or to pipe T4 or to pipe T5 or between pipe T6 emitter stage；Protection circuit resistance R19 is connected in parallel to optocoupler G1；The emitter stage of protection circuit triode is connected with positive source, and the colelctor electrode of the triode of protection circuit first is connected with the colelctor electrode of the intergrade triode T1；
Second protection circuit includes two protection circuit diode D13 ~ D14, protection circuit resistance R24, protection circuit resistance R23, protection circuit resistance R22 and the three protection circuit diode D12 ~ D10 being sequentially connected in series; wherein protection circuit diode D14 ~ D13 is opposite with protection circuit diode D12 ~ D10 setting direction; negative pole-Vcc the connections of protection circuit diode D14 negative pole and power supply, protection circuit diode D10 negative pole is connected with the base stage of second triode of protection circuit；Four protection circuit diode DA7 ~ DA10; its negative pole is all connected between protection circuit resistance R23 and protection circuit resistance R22, and its positive pole is connected to each output stage resistance RK7 or output stage resistance RK8 or output stage resistance RK9 or output stage resistance RK10 and to pipe T7 or to pipe T8 or to pipe T9 or between pipe T10 emitter stage；Protection circuit resistance R24 is parallel with optocoupler G2；The emitter stage of the triode of protection circuit second is connected with power cathode, and the colelctor electrode of the triode of protection circuit second is connected with the colelctor electrode of the intergrade triode T2.
Fig. 3 shows current amplification circuit simplified principle figure in the power amplifying system.According to operational amplifier U1 empty short, empty disconnected concept, the size that can obtain output current is determined by sample resistance RQ and input stage module composition closed loop.Sample resistance RQ precision plays vital effect to the multiplication factor of whole circuit.
For interstage amplifier section module, within a cycle, intergrade triode T1, T2 are both turned on half cycle.Intergrade diode D1 ~ D2 and resistance R8 ~ R11 provide static bias voltage for intergrade triode T1 ~ T2.When static, intergrade triode T1 ~ T2 is operated in lightly conducting state, and adjustment potentiometer R9 ~ R10 size can change intergrade triode T1 ~ T2 quiescent point, so when changing dynamic circuit output waveform.Resistance R13 ~ R17 is penetrates a grade biasing resistor, the stability of the quiescent point for improving circuit.Electric capacity C5 ~ C6 is shunt capacitance, for the exchange negative-feedback of increasing circuit, improves ability of the circuit with inductive load.Electric capacity C3 ~ C4 is individually positioned between two intergrade triode T1 ~ T2 base stage and colelctor electrode, for suppression circuit high-frequency self-excitation and improves ability of the circuit with inductive load.Quiescent voltage on resistance R12 and resistance R15 provides biasing for intergrade triode, is at lightly conducting state.Resistance R18 and electric capacity C7 is the impedance compensating network of output end, for preventing circuit from producing self-excitation and improving ability of the circuit with inductive load.
For output level module, four pairs powerful to make recommending output mode realization to pipe T3~T10, and RA3~RA10 is base resistance, and RK3~RK10 is sample resistance, and reference voltage is provided for protection circuit.Diode D3 ~ D4 is not reversed electric current to pipe for protection and punctured.
For protection circuit, RK3~RK6 is sample resistance, and ohmically voltage determines that whether protection circuit acts.Under normal circumstances, the electric current for flowing through resistance RK3~RK6 is smaller, then diode DA3~DA6 negative pole current potential is higher than anodic potentials, and pipe is not turned on, then diode D5, diode D6, no electric current flows through on optocoupler G1, optocoupler G1 does not send protection signal.When breaking down, resistance RK3~RK6 electric current increase is flowed through, when the voltage on resistance RK3~RK6 is more than 3V; diode DA3~DA6 negative pole current potential is less than anodic potentials; pipe is turned on, then diode D5, diode D6, there is electric current to flow through on optocoupler G1, optocoupler G1 sends protection signal.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing; but not limiting the scope of the invention; on the basis of technical scheme, those skilled in the art need not pay the various modifications that creative work can make or deform still within protection scope of the present invention.
Claims (9)
1. a kind of power amplifying system for intelligent substation test system, including input and output end, it is characterized in that, the input connects input stage module, input stage module is connected by relay J1 with interstage amplifier section module, interstage amplifier section module is connected with power output stage module, and power output stage module is connected by sample resistance RQ with output end, and the sample resistance RQ also is connected to form current negative feedback network with input stage module.
2. a kind of power amplifying system according to claim 1, it is characterised in that also including protection circuit, the protection circuit is connected with power output stage module.
3. a kind of power amplifying system according to claim 1, it is characterised in that the input stage module includes operational amplifier U1, input stage resistance R1 ~ R5；Input stage resistance R1 one end is connected with the input, other end ground connection；Input stage resistance R2 one end is connected with the input, and the other end is connected with operational amplifier U1 inverting input；Input stage resistance R3 one end is connected with operational amplifier U1 inverting input, and the other end is connected with one end of the sample resistance RQ；Input stage resistance R4 one end is connected with operational amplifier U1 normal phase input end, and the other end is connected with the other end of the sample resistance RQ；Input stage resistance R5 one end is connected with operational amplifier U1 normal phase input end, other end ground connection.
4. a kind of power amplifying system according to claim 1, it is characterised in that the interstage amplifier section module is push-pull type structure for amplifying symmetrical above and below.
5. a kind of power amplifying system according to claim 1, characterized in that, the interstage amplifier section module includes 13 intergrade resistance R6 ~ R18, two intergrade triode T1 and T2, two intergrade diode D1 and D2, five intergrade electric capacity C3 ~ C7；Intergrade resistance R6 one end is connected with the relay J1, other end ground connection；Intergrade resistance R7 one end is connected with the relay J1, and the other end is connected between intergrade diode D1 negative pole and intergrade diode D2 positive pole；Intergrade resistance R8, potentiometer R9, intergrade diode D1, intergrade diode D2, potentiometer R10, intergrade resistance R11 are sequentially connected in series, and are parallel to both ends of power；Intergrade triode T1 base stage is connected between the intergrade resistance R8 of series connection and potentiometer R9, and intergrade triode T1 colelctor electrode is connected with intergrade resistance R12, and intergrade triode T1 emitter stage is connected with intergrade resistance R13；Intergrade triode T2 base stage is connected between the intergrade resistance R11 of series connection and potentiometer R10, and intergrade triode T2 colelctor electrode is connected with intergrade resistance R15, and intergrade triode T2 emitter stage is connected with intergrade resistance R14；The first electric capacity of intergrade C3 is connected between intergrade triode T1 base stage and colelctor electrode, and intergrade electric capacity C4 is connected between intergrade triode T2 base stage and colelctor electrode；Intergrade resistance R16 one end connection intergrade triode T1 emitter stage, the other end is connected in series intergrade resistance R17, and intergrade resistance R17 is connected with intergrade triode T2 emitter stage；Intergrade electric capacity C5 one end connection intergrade triode T1 emitter stage, the other end is connected in series intergrade electric capacity C6, and intergrade electric capacity C6 is connected with intergrade triode T2 emitter stage；Intergrade electric capacity C7 one end is connected with intergrade resistance R18, other end ground connection；Intergrade resistance R18, intergrade resistance R16 and intergrade resistance R17, intergrade electric capacity C5 and intergrade electric capacity C6 and the sample resistance RQ are connected to the first node.
6. a kind of power amplifying system according to claim 1, it is characterised in that the power output stage module is push-pull type structure.
7. a kind of power amplifying system according to claim 5, it is characterized in that, the power output stage module includes being parallel to four of both ends of power to pipe branch road, each pipe branch road is included being sequentially connected in series output stage resistance RK3 or output stage resistance RK4 or output stage resistance RK5 or output stage resistance RK6, to pipe T3 or to pipe T4 or to pipe T5 or to pipe T6, to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10 and output stage resistance RK7 or output stage resistance RK8 or output stage resistance RK9 or output stage resistance RK10；Emitter stage to pipe T3 or to pipe T4 or to pipe T5 or to pipe T6 is connected with output stage resistance RK3 or output stage resistance RK4 or output stage resistance RK5 or output stage resistance RK6, colelctor electrode to pipe T3 or to pipe T4 or to pipe T5 or to pipe T6 is connected with to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10 colelctor electrode, base stage connection corresponding with base resistance RA3 or base resistance RA4 or base resistance RA5 or base resistance RA6 one end respectively to pipe T3 or to pipe T4 or to pipe T5 or to pipe T6, base resistance RA3 or base resistance RA4 or base resistance RA5 or base resistance the RA6 other end are all connected to the colelctor electrode of the intergrade triode T1；Emitter stage to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10 is connected with output stage resistance RK7 or output stage resistance RK8 or output stage resistance RK9 or output stage resistance RK10, base stage connection corresponding with base resistance RA7 or output stage resistance RA8 or output stage resistance RA9 or output stage resistance RA10 one end respectively to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10, base resistance RA7 or base resistance RA8 or base resistance RA9 or base resistance the RA10 other end are all connected to the colelctor electrode of the intergrade triode T2；Described couple of pipe T3 or colelctor electrode to pipe T4 or to pipe T5 or to pipe T6 and first node is all connected to pipe T7 or to pipe T8 or to pipe T9 or to pipe T10 colelctor electrode.
8. a kind of power amplifying system according to claim 7, it is characterized in that, the power output stage module also includes output stage diode D3 ~ D4 that both ends of power is parallel to after two series aiding connections, and described two output stage diode D3 ~ D4 are opposite with intergrade diode D1 ~ D2 setting direction；Output stage diode D3 positive pole and output stage diode D4 negative pole are connected to first node.
9. a kind of power amplifying system according to claim 2, it is characterised in that the protection circuit includes the first protection circuit and the second protection circuit；
First protection circuit includes two protection circuit diode D5 ~ D6, protection circuit resistance R19, protection circuit resistance R20, protection circuit resistance R21 and the three protection circuit diode D7 ~ D9 being sequentially connected in series；Protection circuit diode D5 ~ D6 and protection circuit diode D7 ~ D9 setting direction are on the contrary, protection circuit diode D5 positive pole and the positive pole of power supply are connected, and protection circuit diode D9 positive pole is connected with the base stage of the triode of protection circuit first；Four protection circuit diode DA3 ~ DA6; its positive pole is all connected between protection circuit resistance R20 and protection circuit resistance R21, and its negative pole is connected to each output stage resistance RK3 or output stage resistance RK4 or output stage resistance RK5 or output stage resistance RK6 and to pipe T3 or to pipe T4 or to pipe T5 or between pipe T6 emitter stage；Protection circuit resistance R19 is connected in parallel to optocoupler G1；The emitter stage of protection circuit triode is connected with positive source, and the colelctor electrode of the triode of protection circuit first is connected with the colelctor electrode of the intergrade triode T1；
Second protection circuit includes two protection circuit diode D13 ~ D14, protection circuit resistance R24, protection circuit resistance R23, protection circuit resistance R22 and the three protection circuit diode D12 ~ D10 being sequentially connected in series; wherein protection circuit diode D14 ~ D13 is opposite with protection circuit diode D12 ~ D10 setting direction; protection circuit diode D14 negative pole and the negative pole of power supply are connected, and protection circuit diode D10 negative pole is connected with the base stage of second triode of protection circuit；Four protection circuit diode DA7 ~ DA10; its negative pole is all connected between protection circuit resistance R23 and protection circuit resistance R22, and its positive pole is connected to each output stage resistance RK7 or output stage resistance RK8 or output stage resistance RK9 or output stage resistance RK10 and to pipe T7 or to pipe T8 or to pipe T9 or between pipe T10 emitter stage；Protection circuit resistance R24 is parallel with optocoupler G2；The emitter stage of the triode of protection circuit second is connected with power cathode, and the colelctor electrode of the triode of protection circuit second is connected with the colelctor electrode of the intergrade triode T2.
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| CN201210546101.XA CN103023439B (en) | 2012-12-14 | 2012-12-14 | A kind of power amplifying system for intelligent substation test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210546101.XA CN103023439B (en) | 2012-12-14 | 2012-12-14 | A kind of power amplifying system for intelligent substation test system |
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| CN103023439A true CN103023439A (en) | 2013-04-03 |
| CN103023439B CN103023439B (en) | 2015-10-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109100551A (en) * | 2017-06-21 | 2018-12-28 | 国网江苏省电力公司常州供电公司 | The high-precision power amplifier of test device for relay protection |
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|---|---|
| CN103023439B (en) | 2015-10-28 |
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