CN2929730Y - Quick detector for transformer capacity and loss - Google Patents
Quick detector for transformer capacity and loss Download PDFInfo
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- CN2929730Y CN2929730Y CN 200620025099 CN200620025099U CN2929730Y CN 2929730 Y CN2929730 Y CN 2929730Y CN 200620025099 CN200620025099 CN 200620025099 CN 200620025099 U CN200620025099 U CN 200620025099U CN 2929730 Y CN2929730 Y CN 2929730Y
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Abstract
A quick-testing instrument for transformer capacity and loss belongs to the field of measuring and testing technique, aiming to solve the problem of testing transformer parameters, whose technical scheme includes: the quick-testing instrument for transformer capacity and loss comprises a cabinet and circuit parts inside the cabinet, wherein the circuit parts consists of voltage signal acquisition and amplification circuits, current signal acquisition and amplification circuits, channel selection circuits, analog to digital conversion circuits, a single-chip system and a liquid crystal display YJ, wherein the output ports of the voltage signal acquisition and amplification circuits and the current signal acquisition and amplification circuits are connected with the import of the channel selection circuits, and the output port of the channel selection circuits is connected with the import of the analog to digital conversion circuits whose output port is connected with the import of the single-chip system, the display circuits are connected with the output port of the single-chip system. The utility model has the advantages of simple connection, precision meterage, multiple functions and the transformer capacity and loss could be tested quickly, thereby making convenience for using.
Description
Technical field
The utility model relates to a kind of device that can test transformer capacity and loss fast, belongs to technical field of measurement and test.
Background technology
The loss of transformer is the key factor in efficient, temperature rise and life-span of influencing transformer, needs the open circuit loss and the load loss of measuring transformer in the production run of transformer and transformer commissioning test.The method of testing of existing transformer noload losses and load loss is to use voltage table, reometer and power meter to measure, not only wiring complexity of this method of testing, and workload is big, and measurement result influences greatly by human factor, and degree of accuracy is very low.Capacity is the important technology parameter of transformer, in transformer production and use, usually needs the transformer parameter of measuring or checking and approving.Can not measure under the situation such as experiment power supply though the present instrument of existing measuring transformer capacity, existing instrument have a power failure or do not have in test site, this to transformer capacity test make troubles.In addition, the test of transformer capacity is the same with loss test also will use multiple survey instrument, also makes measuring operation become loaded down with trivial details.Therefore design a kind of simple to operate, measure accurate, multiple functional transformer parameter proving installation and have very important significance.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of easy and simple to handle, multi-functional, transformer parameter proving installation that precision is high is provided.
Problem of the present utility model realizes with following technical proposals:
A kind of transformer capacity and loss high speed tester, it is by cabinet and place the circuit part in it to form, circuit part is gathered amplifying circuit, channel selection circuit, analog to digital conversion circuit, Single Chip Microcomputer (SCM) system and LCD YJ by voltage signal acquisition amplifying circuit, current signal and is constituted, described voltage signal acquisition amplifying circuit is provided with three the tunnel, difference corresponding A BC three-phase, every routing voltage mutual inductor PT, operational amplifier F1 and programmable gain amplifier U1 form; Described current signal is gathered amplifying circuit and is provided with three the tunnel, every road is by current transformer CT, operational amplifier F2, resistance R 1 and programmable gain amplifier U2 form, channel selection circuit is made of multi-way switch U3, analog to digital conversion circuit is by analog to digital converter U6, U7 constitutes, Single Chip Microcomputer (SCM) system is by CPU, latch U8, eight d type flip flop U4, U5 and code translator U9 form, the voltage signal acquisition amplifying circuit, the output terminal of current signal collection amplifying circuit connects the input end of channel selection circuit, the input end of the output termination analog to digital conversion circuit of channel selection circuit, the output terminal of analog to digital conversion circuit connects the input end of Single Chip Microcomputer (SCM) system, and display circuit connects the output interface of Single Chip Microcomputer (SCM) system.
Above-mentioned transformer capacity and loss high speed tester, the formation of described each several part circuit and annexation are:
Voltage transformer pt is connected to one of tested transformer primary coil and goes up mutually, its signal output part connects the in-phase input end of operational amplifier F1, operational amplifier F1 is connected into voltage follower, the VIN end of its output termination programmable gain amplifier U1, the A0 of programmable gain amplifier U1～A2 end connects Q4～Q6 end of eight d type flip flop U5 respectively, and the signal output part V SEN of three programmable gain amplifier U1 of three voltage signal acquisition amplifying circuits connects S1～S3 end of multi-way switch U3 respectively; Current transformer CT is connected to one of tested transformer primary coil and goes up mutually, its signal output part connects the in-phase input end of operational amplifier F2, resistance R 1 is connected between the reverse input end and output terminal of operational amplifier F2, the VIN end of the output termination programmable gain amplifier U2 of operational amplifier F2, the A0 of programmable gain amplifier U2～A2 end connects Q0～Q2 end of eight d type flip flop U5 respectively, and the signal output part V SEN of three programmable gain amplifier U2 of three current signal collection amplifying circuits connects the S5 of multi-way switch U3～S7 end respectively; The A0 of multi-way switch U3, A1 end connects Q1, the Q2 end of eight d type flip flop U4 respectively, and the output signal of its OT1 end connects the 20Vspn end of analog to digital converter U6, and the output signal of its OT2 end connects the 20Vspn end of analog to digital converter U7; The 1sbDB0 of analog to digital converter U6, U7, DB1～DB3 end connects P04～P07 end of CPU respectively, and its DB4～DB10 and msb-11 end connect P00～P07 end of CPU successively, and A0/SC, R/S end connects A0, the A1 end of latch U8 respectively; The D0 of latch U8, eight d type flip flop U4, U5～D7 end connects P00～P07 end of CPU respectively, the data line of LCD YJ connects P00～P07 end of CPU, the A of code translator U9, B, C end connect P24～P26 end of CPU respectively, and its chip selection signal output terminal Y1, Y2, Y0, Y4 and Y3 connect the CLK of eight d type flip flop U4, U5, the CS of analog to digital converter U6, U7 and the chip selection signal input end of LCD YJ respectively.
Above-mentioned transformer capacity and loss high speed tester, described circuit part are set up a three phase inverter NB.
Above-mentioned transformer capacity and loss high speed tester, gather amplifying circuit at current signal and set up the enlargement factor regulating circuit, described enlargement factor regulating circuit is made up of resistance R 2 and relay J, the coil of relay J connects the Q3 end of eight d type flip flop U5, is connected to resistance R 1 two ends after its normally opened contact J-1 and resistance R 2 are connected in series.
The utility model is gathered amplifying circuit by voltage signal acquisition amplifying circuit, current signal and is gathered the voltage and the current signal of transformer primary coil and carry out processing and amplifying, each road voltage and current signal are behind the channel selection circuit gating, the analog to digital converter U6, the U7 that voltage, current signal are sent into analog to digital conversion circuit respectively carry out analog to digital conversion, digital signal after the conversion enters CPU, CPU analyzes computing to voltage and current signal, at last resulting capacity of computing or loss numerical value is presented on the LCD XS.By Single Chip Microcomputer (SCM) system is provided with, the utility model is tested to different parameters.When test site does not have power supply or power failure, can utilize three phase inverter of the present utility model to test.The utility model wiring is simple, measurement is accurate, multiple functional, can test transformer capacity and loss fast, and is very easy to use.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the utility model electricity theory diagram;
Fig. 2 is an electrical schematic diagram.
Each label is among the figure: U-1, U-2, U-3. voltage signal acquisition amplifying circuit, and I-1, I-2, I-3. current signal are gathered amplifying circuit, PT. voltage transformer (VT), CT. current transformer, F1, F2. operational amplifier, U1, U2. programmable gain amplifier, U3. multi-way switch, U4, U5. eight d type flip flops, U6, U7. analog to digital converter, U8. latch, U9. code translator, NB. three phase inverter, XS. display, the DY. printer.
Embodiment
Among Fig. 2, U-1, U-2, U-3 are three voltage signal acquisition amplifying circuits, and I-1, I-2, I-3 are that three current signals are gathered amplifying circuit.Three voltage signal acquisition amplifying circuits and three current signals are gathered amplifying circuit and are connect three of transformer not homophases respectively.
The model of operational amplifier F1, F2 is OP07, the model of programmable gain amplifier U1, U2 is AD52 6JN, the model of multi-way switch U3 is AD7502, the model of eight d type flip flop U4, U5 is 74LS374, the model of analog to digital converter U6, U7 is AD1674, latch U8 is 74HC373, and code translator U9 is 74HC138, and CPU selects 78E516B for use.
The course of work of the present utility model is: the VIN that the voltage signal of voltage transformer pt collection is delivered to programmable gain amplifier U1 through voltage follower holds, and voltage signal is delivered to the input end of multi-way switch U3 after amplifying.Voltage transformer (VT) carries out fixed attenuation to voltage signal, and the gain of programmable gain amplifier U1, is controlled by Q4～Q6 end of eight d type flip flop U5 according to the signal power by CPU.The current signal that current transformer CT gathers is delivered to the VIN end of programmable gain amplifier U2 after the amplifying circuit of F2 and R1 composition amplifies, current signal is delivered to the input end of multi-way switch U3 after amplifying.The gain of programmable gain amplifier U2, is controlled by Q0～Q2 end of eight d type flip flop U5 according to the signal power by CPU.CPU can also send control signal to eight d type flip flop U5, makes the relay of its Q3 end get electronic work, and resistance R 2 is in parallel with R1, increases signal amplification factor.Multi-way switch U3 is that two-way four selects a switch, CPU selects to connect which voltage, current signal by eight d type flip flop U4 control, the voltage signal that is switched on is delivered to the 20Vspn end of analog to digital converter U6, and analog to digital converter U6 is a digital signal with analog signal conversion, sends into CPU then.The current signal that is switched on is delivered to the 20Vspn end of analog to digital converter U7, and analog to digital converter U7 is a digital signal with analog signal conversion, sends into CPU then.CPU to voltage, current signal analyze, computing, and operation result be presented at that LCD XS goes up or print by printer DY.Keyboard can carry out the setting and the may command measurement process of parameter to single-chip microcomputer, and the utility model can be tested transformer noload losses, load loss and capacity fast.
CPU is by calculating the A/D switching signal that receives, and the control programmable gain amplifier carries out the switching of corresponding range, and CPU is according to measuring sequence control multi-way switch U3.The signal of the P24 of CPU～P26 end forms six chip selection signals, control circuit work after code translator U9 decoding.
When test site does not have power supply or power failure, can utilize three phase inverter of the present utility model to test.
The utility model can be arranged on inverter lead-out terminal (Ia ', Ib ', Ic '), current input terminal (IA ', IB ', IC '), current output terminal (Ia, Ib, Ic), voltage input end (Ua, Ub, Uc, U0), 320 * 240 lattice lcds, keyboard, supply socket etc. on the instrument face plate when making testing tool; The input end of voltage, current transformer links to each other with the input of instrument panel, lead-out terminal.When using inner inverter, inverter output terminal (Ia ', Ib ', Ic ') and current transformer input end (Ia, Ib, Ic) short circuit.Test result is except that reading shows, also available printer prints is come out, and generally adopts mini-printer.
Claims (4)
1, a kind of transformer capacity and loss high speed tester, it is characterized in that, it is by cabinet and place the circuit part in it to form, wherein, circuit part is gathered amplifying circuit, channel selection circuit, analog to digital conversion circuit, Single Chip Microcomputer (SCM) system and LCD (YJ) by voltage signal acquisition amplifying circuit, current signal and is constituted, described voltage signal acquisition amplifying circuit is provided with three the tunnel, difference corresponding A BC three-phase, every routing voltage mutual inductor (PT), operational amplifier (F1) and programmable gain amplifier (U1) are formed; Described current signal is gathered amplifying circuit three, by current transformer (CT), operational amplifier (F2), resistance R 1 and programmable gain amplifier (U2) are formed, channel selection circuit is made of multi-way switch (U3), analog to digital conversion circuit is by analog to digital converter (U6, U7) constitute, Single Chip Microcomputer (SCM) system is by CPU, latch (U8), eight d type flip flop (U4, U5) and code translator (U9) form, the voltage signal acquisition amplifying circuit, the output terminal of current signal collection amplifying circuit meets the input end of channel selection circuit, the input end of the output termination analog to digital conversion circuit of channel selection circuit, the output terminal of analog to digital conversion circuit connects the input end of Single Chip Microcomputer (SCM) system, and display circuit connects the output interface of Single Chip Microcomputer (SCM) system.
According to described transformer capacity of claim 1 and loss high speed tester, it is characterized in that 2, the formation of each several part circuit and annexation are:
Voltage transformer (VT) (PT) is connected to one of tested transformer primary coil and goes up mutually, its signal output part meets the homophase input end of operational amplifier F1, operational amplifier (F1) is connected into voltage follower, the VIN end of its output termination programmable gain amplifier (U1), the A0 of programmable gain amplifier (U1)～A2 end connects the Q4～Q6 end of eight d type flip flops (U5) respectively, and the signal output part V SEN of three programmable gain amplifiers (U1) of three voltage signal acquisition amplifying circuits connects the S1 of multi-way switch (U3)～S3 end respectively; Current transformer (CT) is connected to one of tested transformer primary coil and goes up mutually, its signal output part meets the homophase input end of operational amplifier (F2), resistance R 1 is connected between the reverse input end and output terminal of operational amplifier (F2), the VIN end of the output termination programmable gain amplifier (U2) of operational amplifier F2, the A0 of programmable gain amplifier (U2)～A2 end connects the Q0～Q2 end of eight d type flip flops (U5) respectively, and the signal output part V SEN of three programmable gain amplifiers (U2) of three current signal collection amplifying circuits connects the S5 of multi-way switch (U3)～S7 end respectively; A0, the A1 end of multi-way switch (U3) connects Q1, the Q2 end of eight d type flip flops (U4) respectively, and the output signal of its OT1 end connects the 20Vspn end of tool number converter (U6), and the output signal of its OT2 end connects the 20Vspn end of analog to digital converter (U7); 1sbDB0, the DB1 of analog to digital converter (U6, U7)～DB3 end connects P04～P07 end of CPU respectively, and its DB4～DB10 and msb-11 end connect P00～P07 end of CPU successively, and A0/SC, R/S end connects A0, the A1 end of latch (U8) respectively; The D0 of latch U8, eight d type flip flops (U4, U5)～D7 end connects P00～P07 end of CPU respectively, the data line of LCD YJ connects P00～P07 end of CPU, A, the B of code translator (U9), C end is the P24 of CPU～P26 end respectively, and its chip selection signal output terminal Y1, Y2, Y0, Y4 and Y3 connect the CLK of eight d type flip flops (U4, U5), the CS of analog to digital converter (U6, U7) and the chip selection signal input end of LCD YJ respectively.
3,, it is characterized in that setting up a three phase inverter according to described transformer capacity of claim 2 and loss high speed tester.
4, according to claim 1 or 2 described transformer capacities and loss high speed tester, it is characterized in that, gather amplifying circuit at current signal and set up the enlargement factor regulating circuit, described enlargement factor regulating circuit is made up of resistance R 2 and relay J, the coil of relay J connects the Q3 end of eight d type flip flops (U5), is connected to resistance R 1 two ends after its normally opened contact J-1 and resistance R 2 are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620025099 CN2929730Y (en) | 2006-07-28 | 2006-07-28 | Quick detector for transformer capacity and loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620025099 CN2929730Y (en) | 2006-07-28 | 2006-07-28 | Quick detector for transformer capacity and loss |
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| Publication Number | Publication Date |
|---|---|
| CN2929730Y true CN2929730Y (en) | 2007-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620025099 Expired - Fee Related CN2929730Y (en) | 2006-07-28 | 2006-07-28 | Quick detector for transformer capacity and loss |
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| Country | Link |
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| CN (1) | CN2929730Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196491A (en) * | 2013-03-22 | 2013-07-10 | 广州供电局有限公司 | Transformer integral comprehensive detection device |
| CN103278675A (en) * | 2013-06-17 | 2013-09-04 | 成都荣耀科技有限公司 | Circuit used for acquiring signal during remote monitoring conducted on distribution transformer |
| CN103675432A (en) * | 2013-12-11 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Signal amplitude converting system applied to paper recorder |
| CN112468149A (en) * | 2020-11-10 | 2021-03-09 | 上海航天控制技术研究所 | Device for inhibiting fluctuation of switching output signals of channels of multi-channel selector |
| CN116990625A (en) * | 2023-09-27 | 2023-11-03 | 国网江苏省电力有限公司电力科学研究院 | Function switching system and method of intelligent quick-checking device of distribution transformer |
-
2006
- 2006-07-28 CN CN 200620025099 patent/CN2929730Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196491A (en) * | 2013-03-22 | 2013-07-10 | 广州供电局有限公司 | Transformer integral comprehensive detection device |
| CN103196491B (en) * | 2013-03-22 | 2015-09-23 | 广州供电局有限公司 | Transformer integral comprehensive detection device |
| CN103278675A (en) * | 2013-06-17 | 2013-09-04 | 成都荣耀科技有限公司 | Circuit used for acquiring signal during remote monitoring conducted on distribution transformer |
| CN103675432A (en) * | 2013-12-11 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Signal amplitude converting system applied to paper recorder |
| CN103675432B (en) * | 2013-12-11 | 2016-11-23 | 重庆川仪自动化股份有限公司 | It is applied to the signal amplitude converting system of paper recorder |
| CN112468149A (en) * | 2020-11-10 | 2021-03-09 | 上海航天控制技术研究所 | Device for inhibiting fluctuation of switching output signals of channels of multi-channel selector |
| CN116990625A (en) * | 2023-09-27 | 2023-11-03 | 国网江苏省电力有限公司电力科学研究院 | Function switching system and method of intelligent quick-checking device of distribution transformer |
| CN116990625B (en) * | 2023-09-27 | 2023-12-08 | 国网江苏省电力有限公司电力科学研究院 | Function switching system and method of intelligent quick-checking device of distribution transformer |
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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 |