CN2376629Y - Program-controlled testing power supply - Google Patents
Program-controlled testing power supply Download PDFInfo
- Publication number
- CN2376629Y CN2376629Y CN 99220789 CN99220789U CN2376629Y CN 2376629 Y CN2376629 Y CN 2376629Y CN 99220789 CN99220789 CN 99220789 CN 99220789 U CN99220789 U CN 99220789U CN 2376629 Y CN2376629 Y CN 2376629Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- chip
- connects
- output terminal
- output
- 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.)
- Expired - Fee Related
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000003750 conditioning effect Effects 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 13
- 239000013078 crystal Substances 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to a can produce programme-controlled test power of various frequency, wave form. The device comprises a frequency conversion waveform generating circuit controlled by a microcontroller and composed of a frequency synthesis circuit and a waveform generating circuit, wherein the waveform generating circuit is composed of an address generator, a waveform memory, a D/A (digital/analog) conversion circuit and a waveform signal conditioning circuit which are sequentially connected by an output end and an input end. The utility model discloses a signal parameter variation range is big to can set for wantonly according to user's needs, therefore have application scope wide, convenient operation, characteristics that use cost is low. Additionally, under microcontroller's control the utility model discloses the signal of telecommunication parameter of output is accurate, makes electrical apparatus can normal operating, if use it to test electrical apparatus as the standard moreover, the data that obtain are also comparatively accurate, can reflect product quality really.
Description
The utility model is a kind of program control test power supply that can produce various frequencies, waveform.
Because the use of various electrical equipment, equipment even load, the electric signal of power plant's output tends to be subjected to " pollution ", be that its voltage, electric current and waveform etc. are because the influence of interference noise becomes non-standard signal, this normal operation to electrical equipment can produce harmful effect, and, when electrical equipment was detected, the data that obtain were also inaccurate, thereby made this detection meaningless.In addition, general power supply is generally only exported a kind of electric signal at present, because the signal standards difference that different countries uses, thereby to use different power supplys, this makes troubles for the use of power supply manufacturer and other national import equipment.
The purpose of this utility model is: design a kind of program control test power supply that the electric signal of different voltages, electric current, frequency, waveform can be set as required.
The utility model comprises by frequency conversion wave generator circuit microprocessor controls, that be made up of frequency synthesizer circuit and Waveform generating circuit, and wherein the address generator, wave memorizer, D/A change-over circuit and the waveform signal modulate circuit that are connected successively by output terminal and input end of Waveform generating circuit formed.
In the utility model, the effect of frequency synthesizer circuit is to produce required optional frequency, the effect of Waveform generating circuit then is that next standing wave shape of this frequency of generation is the electric signal of certain voltage, electric current, and the generation of this electric signal is to be determined according to the defeated face of putting of external condition by microcontroller.This shows that signal parameter variation range of the present utility model is big, and can set arbitrarily, thereby have characteristics applied widely, easy to operate, that use cost is low according to user's needs.In addition, the electric signal parameter of the utility model output is accurate under the control of microcontroller, and electrical equipment can normally be moved, and if be that standard is tested electrical equipment with it, the data that obtain are also comparatively accurate, can reflect product quality truly.
Frequency synthesizer circuit in the utility model can adopt following form: it comprises that frequency synthesizer circuit comprises programmable counter chip IC 107, its counter output connects the 3rd pin of phase-locked loop chip 4046 (IC108), and its 4th pin is the output terminal of frequency synthesizer circuit; Other has and connects crystal oscillating circuit between the 10th, 11 pin of a chip 4060 (IC109) and form the reference frequency generator, and its 15th pin connects the phase comparator input end of chip IC 108.
At least one sample circuit of being made up of sampling hold circuit of sensor and output terminal connection thereof also can be installed in the utility model be connected with microcontroller by the A/D change-over circuit, sensor wherein can be voltage sensor, also can be sensors such as electric current.Utilize sensor, the utility model can also be directly used in the test to electrical parameter, reaches the purpose of a tractor serves several purposes.
Microcontroller has a Correction and Control signal output part to connect signal correcting circuit, the input end of output termination one multiplier of the output terminal of signal correcting circuit and frequency conversion wave generator circuit, its output termination one power amplifier, the output terminal of power amplifier connects the input end of signal correcting circuit by feedback circuit.
Said feedback circuit comprises the mutual inductor that is connected with power amplifier, and mutual inductor amplifies the 1st pin that conditioning chip IC 122 connects the A/D chip, and the 6th pin of this chip connects the input end of signal correcting circuit.
Said signal correcting circuit comprises chip F1, connects its output terminal by resistance R 1, R2 respectively between its positive pole, the negative pole, and its negative pole is by resistance R 3 ground connection.The output terminal of chip F1 connects the negative pole of chip F2 by resistance R 4, be connected to capacitor C between the negative pole of F2 and the output terminal, it is anodal by resistance R 5 ground connection, the output termination multiplier of F2---the 13rd pin of chip AD532, and the 7th pin of this chip of output termination of frequency conversion waveform generator, output after its 1st, 2 pin joins.
Waveform generating circuit comprises address generator circuit that is made of counter chip IC111, the IC112 of series connection and IC113 and the waveform data memory chip IC 114 that is attached thereto, this chip adopts the ROM storer of the above capacity of 8K byte, its data export D/A chip IC 115 to, and the three-stage operational amplifier of forming via IC129, IC130, IC131 carries out waveform signal conditioning back output again.Wherein, the negative pole of IC129 connects the OUT1 end of IC115, and its positive pole is connected to feedback resistance R119 through resistance R 120 ground connection between output terminal and negative pole; The IC130 negative pole connects the OUT2 end of IC115, connects the output terminal of IC129 simultaneously through resistance R 121.IC130 is anodal by resistance R 122 ground connection, the RFB pin of output termination IC115, and connect the positive pole that meets IC131 behind the filter capacitor C118 over the ground by resistance R 123, R124 series connection, negative pole and output terminal short circuit are after capacitor C 115 connects the tie point of R123 and R124.Waveform signal is exported through the IC131 output terminal.
Said power amplifier
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
Fig. 1 is the block scheme of the utility model embodiment;
Fig. 2 is the wiring diagram of present embodiment sample circuit and control circuit;
Fig. 3 is the wiring diagram of display circuit;
Fig. 4 is the wiring diagram of frequency synthesizer circuit;
Fig. 5 is the wiring diagram of Waveform generating circuit;
Fig. 6 is the wiring diagram of signal correcting circuit;
Fig. 7 is the wiring diagram of feedback circuit;
Fig. 8 is the power amplifier of embodiment one;
Fig. 9 is the power amplifier of embodiment two;
Present embodiment is by being that control core circuit, frequency conversion wave generator circuit, sample circuit and output channel are formed with the microcontroller.Wherein form by custom circuits such as CPU, the latch that is attached thereto, storer, display circuit, the defeated discharge of key road, complete machine power supplys in the control circuit, its structure such as Fig. 2, shown in Figure 3, its detailed description is omitted here.And sample circuit is made up of the voltage and current sample circuit, and as shown in Figure 2, each road sample circuit comprises that the measurement sample circuit be made up of mutual inductor is the sampling hold circuit of core with what be connected with its output terminal with chip LM398.The CPU of the output terminal of sampling hold circuit in A/D conversion connection control circuit.The output terminal of CPU is with D/A conversion output control signal, and this signal connects correction circuit after two-stage is amplified conditioning.The frequency conversion wave generator circuit of present embodiment comprises frequency synthesizer circuit and Waveform generating circuit.Wherein, frequency synthesizer circuit as shown in Figure 4, it comprises programmable counter chip IC 107, phase-locked loop chip IC108 and reference frequency generator; Wherein the reference frequency generator is made up of serial counter chip IC 109 and the crystal oscillating circuit that is attached thereto: crystal oscillating circuit is connected between the 10th and 11 pin of chip IC 109, and produce reference frequency to ground by capacitor C 115, C116, by counting delivery outlet---the 15th pin connects the phase comparator input end of IC108---the 14th pin of IC109, the counter output of another input termination programmable counter IC107 of phase comparator is its 6th pin again; 11,12 pin of IC108 connect capacitor C 114 by resistance R 114, R115 ground connection between 6,7 pin, its 4th pin output.Waveform generating circuit as shown in Figure 5, it comprises address generator circuit that is made of counter chip IC111, the IC112 of series connection and IC113 and the waveform data memory chip IC 114 that is attached thereto, this chip adopts the ROM storer of the above capacity of 8K byte, its data export D/A chip IC 115 to, and the three-stage operational amplifier of forming via IC129, IC130, IC131 carries out waveform signal conditioning back output again.Wherein, the negative pole of IC129 connects the OUT1 end of IC115, and its positive pole is connected to feedback resistance R119 through resistance R 120 ground connection between output terminal and negative pole; The IC130 negative pole connects the OUT2 end of IC115, connects the output terminal of IC129 simultaneously through resistance R 121.IC130 is anodal by resistance R 122 ground connection, the RFB pin of output termination IC115, and connect the positive pole that meets IC131 behind the filter capacitor C118 over the ground by resistance R 123, R124 series connection, negative pole and output terminal short circuit are after capacitor C 115 connects the tie point of R123 and R124.Waveform signal is exported through the IC131 output terminal.The output channel of present embodiment is divided into voltage output channel and current output channels.Each paths is made up of signal correcting circuit, multiplier, output protection circuit and feedback circuit, and corrected signal is by signal correcting circuit and the synthetic generation of feedback signal.Correction circuit comprises chip F1, connects its output terminal by resistance R 1, R2 respectively between its positive pole, the negative pole, and its negative pole is by resistance R 3 ground connection.The output terminal of chip F1 connects the negative pole of chip F2 by resistance R 4, be connected to capacitor C between the negative pole of F2 and the output terminal, it is anodal by resistance R 5 ground connection, the output termination multiplier of F2---the 13rd pin of chip AD532, and the 7th pin of this chip of output termination of frequency conversion waveform generator, output connect power amplifier after its 1st, 2 pin joined.The power amplifier of present embodiment is the OCL circuit, and as shown in Figure 8, operational amplifier F3 amplifies small-signal as prime amplifier, and Q1 and Q2 are as promoting pipe, and Q3, Q4 are as power amplifier tube, and the waveform after the amplification closes output by transformer T1 lotus root.If the increase output power, can power amplifier tube Q3, Q4 in foregoing circuit on amplifier tube Q5, Q6, Q7, the Q8 of same type in parallel.The mutual inductor of the output termination feedback circuit of power amplifier, as shown in Figure 7, the output terminal of mutual inductor is by amplifying the 1st pin that conditioning chip IC 122 meets chip AD536, and the 6th pin of this chip exports the positive pole of signal correcting circuit chips F1 to.
Embodiment two:
The basic structure of present embodiment is identical with embodiment one, no longer repeats with regard to its same section here.What present embodiment and embodiment one were different is its power amplifier, and as shown in figure 10, power amplifier has adopted extendible BTL circuit in the present embodiment.It is made up of two parts OCL circuit up and down, and the input signal of two parts circuit is anti-phase each other up and down, connects output transformer between the output terminal, forms the mode that upper and lower two parts circuit " pushes away, draws " cooperating, has enlarged the output dynamic amplitude.The composition mode of BTL circuit is: the waveform signal of multiplier output is through the positive pole of resistance R 301 and capacitor C 316 to preamplifier chip IC301 (UPC1342), 11 pin and 12 pin of IC301 output to the promotion amplifying circuit, the signal of the defeated end points P output of this circuit and the anodal input signal homophase of IC301, send the negative pole of lower circuit preamplifier IC 302 with resistance R 323, capacitor C 322, the signal and the IC302 negative pole input signal of the output point N output of lower circuit are anti-phase, and be also anti-phase with P point signal.Therefore, P point and N point form one for the output transformer T302 that is connected and push away one and draw or one draw a symmetrical operation mode that pushes away, make the output waveform amplitude increase nearly one times than OCL circuit, this circuit has at least one road OCL circuit or two-way OCL circuit to form the BTL circuit, has at least a pair of NPN and PNP triode or many amplifier tubes to parallel connection to carry out power expansion in the amplifying circuit.
Claims (9)
1, a kind of program control test power supply, it is characterized in that: it comprises with CPU being control core circuit and by frequency conversion wave generator circuit control circuit control, that be made up of frequency synthesizer circuit and Waveform generating circuit, and wherein the address generator, wave memorizer, D/A change-over circuit and the waveform signal modulate circuit that are connected successively by output terminal and input end of Waveform generating circuit formed.
2, program control test power supply according to claim 1, it is characterized in that: said frequency synthesizer circuit comprises programmable counter chip IC 107, its counter output connects the 3rd pin of phase-locked loop chip 4046 (IC108), and its 4th pin is the output terminal of frequency synthesizer circuit; Other has and connects crystal oscillating circuit between the 10th, 11 pin of a chip 4060 (IC109) and form the reference frequency generator, and its 15th pin connects the phase comparator input end of chip IC 108.
3, program control test power supply according to claim 1 and 2, it is characterized in that: Waveform generating circuit comprises address generator circuit that is made of counter chip IC111, the IC112 of series connection and IC113 and the waveform data memory chip IC 114 that is attached thereto, this chip adopts the ROM storer of the above capacity of 8K byte, its data export D/A chip IC 115 to, and the three-stage operational amplifier of forming via IC129, IC130, IC131 carries out waveform signal conditioning back output again; Wherein, the negative pole of IC129 connects the OUT1 end of IC115, and its positive pole is connected to feedback resistance R119 through resistance R 120 ground connection between output terminal and negative pole; The IC130 negative pole connects the OUT2 end of IC115, connects the output terminal of IC129 simultaneously through resistance R 121; IC130 is anodal by resistance R 122 ground connection, the RFB pin of output termination IC115, and connect the positive pole that meets IC131 behind the filter capacitor C118 over the ground by resistance R 123, R124 series connection, negative pole and output terminal short circuit are after capacitor C 115 connects the tie point of R123 and R124.Waveform signal is exported through the IC131 output terminal.
4, program control test power supply according to claim 1 and 2 is characterized in that: the sample circuit of being made up of at least one sampling hold circuit that is connected by sensor and output terminal thereof is connected with microcontroller by the A/D change-over circuit.
5, program control test power supply according to claim 4, it is characterized in that: microcontroller has a Correction and Control signal output part to connect signal correcting circuit, the input end of output termination one multiplier of the output terminal of signal correcting circuit and frequency conversion wave generator circuit, its output termination one power amplifier, the output terminal of power amplifier connects the input end of signal correcting circuit by feedback circuit.
6, program control test power supply according to claim 5, it is characterized in that: said feedback circuit comprises the mutual inductor that is connected with power amplifier, mutual inductor amplifies the 1st pin that conditioning chip IC 122 connects the A/D chip, and the 6th pin of this chip connects the input end of signal correcting circuit.
7, program control test power supply according to claim 6, it is characterized in that: said signal correcting circuit comprises chip F1, connects its output terminal by resistance R 1, R2 respectively between its positive pole, the negative pole, its negative pole is by resistance R 3 ground connection; The output terminal of chip F1 connects the negative pole of chip F2 by resistance R 4, be connected to capacitor C between the negative pole of F2 and the output terminal, it is anodal by resistance R 5 ground connection, the output termination multiplier of F2---the 13rd pin of chip AD532, and the 7th pin of this chip of output termination of frequency conversion waveform generator, output after its 1st, 2 pin joins.
8, program control test power supply according to claim 7 is characterized in that: said power amplifier is extendible BTL circuit, wherein has at least a pair of NPN and PNP triode or many amplifier tubes to parallel connection to carry out power expansion.
9, program control test power supply according to claim 7 is characterized in that; Said power amplifier is the OCL circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99220789 CN2376629Y (en) | 1999-05-05 | 1999-05-05 | Program-controlled testing power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99220789 CN2376629Y (en) | 1999-05-05 | 1999-05-05 | Program-controlled testing power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2376629Y true CN2376629Y (en) | 2000-05-03 |
Family
ID=34011472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99220789 Expired - Fee Related CN2376629Y (en) | 1999-05-05 | 1999-05-05 | Program-controlled testing power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2376629Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018503A (en) * | 2012-11-29 | 2013-04-03 | 广东电网公司电力科学研究院 | High-precision power frequency micro differential source |
| CN103760392A (en) * | 2014-01-22 | 2014-04-30 | 西安电子科技大学 | Adjustment amendment signal generating circuit used for DC-DC converter |
| CN104198779A (en) * | 2014-08-13 | 2014-12-10 | 武汉精测电子技术股份有限公司 | Probe short-circuit signal detection device and signal generating method thereof |
| CN108196098A (en) * | 2018-01-11 | 2018-06-22 | 上海展扬通信技术有限公司 | Test circuit and test power supply |
| CN110320828A (en) * | 2018-03-30 | 2019-10-11 | 武汉精测电子集团股份有限公司 | Method and apparatus for controlling the mould group test power supply rise time |
-
1999
- 1999-05-05 CN CN 99220789 patent/CN2376629Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018503A (en) * | 2012-11-29 | 2013-04-03 | 广东电网公司电力科学研究院 | High-precision power frequency micro differential source |
| CN103760392A (en) * | 2014-01-22 | 2014-04-30 | 西安电子科技大学 | Adjustment amendment signal generating circuit used for DC-DC converter |
| CN103760392B (en) * | 2014-01-22 | 2016-05-25 | 西安电子科技大学 | Adjusting corrected signal for DC-DC converter produces circuit |
| CN104198779A (en) * | 2014-08-13 | 2014-12-10 | 武汉精测电子技术股份有限公司 | Probe short-circuit signal detection device and signal generating method thereof |
| CN108196098A (en) * | 2018-01-11 | 2018-06-22 | 上海展扬通信技术有限公司 | Test circuit and test power supply |
| CN110320828A (en) * | 2018-03-30 | 2019-10-11 | 武汉精测电子集团股份有限公司 | Method and apparatus for controlling the mould group test power supply rise time |
| CN110320828B (en) * | 2018-03-30 | 2021-03-05 | 武汉精测电子集团股份有限公司 | Method and device for controlling module to test rise time of power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104849649A (en) | System and method for detecting state of secondary circuit of current transformer for metering | |
| CN204425298U (en) | A kind of faint AC signal amplitude lock-in amplifier | |
| CN104597352A (en) | Power quality monitoring system | |
| CN102879758A (en) | Standard source and detecting device both used for detecting harmonic influence quantity of electronic current transformer | |
| CN2376629Y (en) | Program-controlled testing power supply | |
| CN109752598A (en) | A kind of on-line monitoring method of Switching Power Supply output capacitance, device and system | |
| CN105827247A (en) | Small signal output circuit for intelligent relay protection tester | |
| CN203965499U (en) | The Portable integral machine with waveform generation and oscillography function | |
| CN203745634U (en) | Three-phase electric power harmonic wave standard source | |
| CN209070006U (en) | A kind of current sensor | |
| CN103151993A (en) | Precision alternating current amplifier | |
| CN207516531U (en) | A kind of electroscope calibration equipment | |
| CN110441705A (en) | Battery impedance test device and method | |
| CN203858291U (en) | Measuring circuit for high frequency current | |
| CN208766231U (en) | A kind of dynamic electric resistor measuring circuit | |
| CN208125798U (en) | Open type leakage current sensor | |
| CN2469463Y (en) | On-line monitoring device for partial discharging of current mutual inductor and voltage inductor | |
| CN104242831A (en) | Wideband amplification device with low noise | |
| CN210670026U (en) | Output buffer for audio analyzer | |
| CN214591191U (en) | High-voltage transmitting signal conversion circuit | |
| CN219777815U (en) | Actual current-resistant capability measuring device of differential mode inductance | |
| CN217849385U (en) | High-temperature-resistant precise hybrid integrated amplification circuit | |
| CN109270328A (en) | A kind of LED transient peaks voltage measuring apparatus and measurement method | |
| CN221305898U (en) | Square wave generating circuit and equipment | |
| CN205564013U (en) | Circuit system suitable for differential capacitive sensor signal of long distance transmission |
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 |