CN203982188U - Circuit control device pick-up unit - Google Patents
Circuit control device pick-up unit Download PDFInfo
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- CN203982188U CN203982188U CN201420460910.3U CN201420460910U CN203982188U CN 203982188 U CN203982188 U CN 203982188U CN 201420460910 U CN201420460910 U CN 201420460910U CN 203982188 U CN203982188 U CN 203982188U
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Abstract
The utility model discloses a kind of circuit control device pick-up unit, comprise digital signal processor DSP, DC/DC translation circuit, D/A converting circuit, signal power amplifying circuit, signal isolation circuit, input and output interface circuit, signal conditioning circuit and telecommunication circuit; The utility model can be simulated three-phase output voltage signal, three-phase output current signal and the DC input voitage of inverter; can detect driving signal and the guard signal of circuit control device output; thereby can determine its protection of inverter controller and control function and whether meet correlation technique requirement; test process is without manual operation; test result can screen display also be preserved and generate list automatically; not only can be for inverter production testing; also while can be used for going on business maintenance inverter, using, is intelligence pick-up unit easily.
Description
Technical field
The utility model relates to a kind of proving installation that detects circuit control device various functions index, belong to power technique fields.
Background technology
Inverter is a kind of power supply change-over device, direct current can be converted to the alternating current of 230V, 50Hz alternating current or other type, and the alternating current of its output can be used for various kinds of equipment, meets to greatest extent mobile power supply place or the needs of areas without electricity to AC power.
Inverter controller is mainly by three partial function module compositions: Switching Power Supply, control circuit and holding circuit.Switching Power Supply for the DC input voitage of inverter is converted to controller each several part circuit working required+5V and ± 15V etc.; Control circuit is for generation of the control signal of inverter power module switching tube, to ensure the stable of output voltage; Whether holding circuit is normal for detection of input voltage, output voltage and the output current of inverter, if exceed normal range, and the bus input voltage of rupturing duty module, disables inverter output.
Circuit control device conventionally all needs to use the omnidistance manual testing of the utility appliance such as signal generator, oscillograph, multimeter in the time producing debugging, breakdown maintenance, and test process is loaded down with trivial details, time-consuming and labor intensive.
Summary of the invention
For problems of the prior art; the utility model provides a kind of circuit control device pick-up unit; can simulate three-phase output voltage signal, three-phase output current signal and the DC input voitage of inverter; driving signal and the guard signal of circuit control device output can be detected, thereby its protection of inverter controller can be determined and control function whether meet correlation technique requirement.
Technical solution of the present utility model is: a kind of circuit control device pick-up unit, comprises digital signal processor DSP, DC/DC translation circuit, D/A converting circuit, signal power amplifying circuit, signal isolation circuit, input and output interface circuit, signal conditioning circuit and telecommunication circuit; Described D/A converting circuit, signal isolation circuit, input and output interface circuit, signal conditioning circuit, telecommunication circuit are connected with digital signal processor DSP; The output of described D/A converting circuit exports circuit control device to after by described signal power amplifying circuit.
Described DC/DC translation circuit is by pwm chip control; adopt the two closed loop control modes of current inner loop outer voltage to drive, for DC voltage conversion, power to controller on the one hand; can simulate the DC input voitage of inverter on the one hand, for direct current input overvoltage/undervoltage protection test.
Described D/A converting circuit is selected D/A chip MX7847, it is the D/A converter part of 12 bit parallel inputs, binary channels output, two DAC have respectively an output amplifier and feedback resistance, can make reach ± 10V of the output voltage of amplifier by the load of a 2k Ω; D/A converting circuit has 7 road circuit, is respectively used to produce the half-sinusoid voltage signal of 120 ° of three tunnel phase phasic differences, and its amplitude, changeable frequency, simulate inverter three-phase output voltage signal; The half-wave voltage signal of 120 ° of frequencys multiplication of three tunnel phase phasic differences, its amplitude is variable, simulates inverter three-phase output current signal; One tunnel DC voltage simulating signal, its amplitude is variable, and the output voltage that carrys out analog D C/DC translation circuit is given; Producing 7 tunnel simulating signals needs 4 MX7847, adopts 38 code translator SN74HC138N to carry out sheet choosing to 4 MX7847; Described digital signal processor DSP connects MX7847 by parallel port line, controls output waveform.
Described signal power amplifying circuit has adopted complementary push-pull power amplification circuit, have 6 tunnels, be respectively used to three-phase output voltage simulating signal and the three-phase output current simulating signal of D/A converting circuit output to carry out level conversion and power amplification, export circuit control device to, the closed loop circuit that the output signal of analog AC voltage sensor and AC current sensor is made up of LM358 is followed the tracks of and is controlled.
Described signal isolation circuit, by offering described digital signal processor DSP after the guard signal isolation of circuit control device pick-up unit, has 1 tunnel.
Described signal conditioning circuit Wei10 road, is respectively used to detect described circuit control device pick-up unit and simulates to the three-phase output voltage signal of circuit control device, effective value, d.c. input voltage signal and the inverter control plate output control signal effective value of three-phase output current signal.
Described circuit control device pick-up unit and computer expert cross serial line interface RS485 and complete data communication.Single-chip microcomputer is selected the dsp processor TMS320F2407 of high-performance, low price.
The beneficial effects of the utility model are: the utility model is in whole test process, only need manually each to controller and tester interface to be connected, tester connects computer by serial ports, start test, in whole test process, without manual operation, test result can be preserved generation list automatically, not only can be for inverter production testing, also while can be used for going on business maintenance inverter, use, suitable intelligence is convenient.
Brief description of the drawings
Fig. 1 is the utility model system chart;
Fig. 2 is the utility model D/A converting circuit schematic diagram;
Fig. 3 is the utility model ac output voltage simulating signal power amplification circuit;
Fig. 4 is the utility model ac output current simulating signal power amplification circuit;
Fig. 5 is the utility model controller guard signal testing circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical solutions of the utility model are described further.
As shown in Figure 1 and Figure 2, Fig. 1 is the utility model system chart; Fig. 2 is the utility model D/A converting circuit schematic diagram.The present embodiment circuit control device pick-up unit, comprises digital signal processor DSP, DC/DC translation circuit, D/A converting circuit, signal power amplifying circuit, signal isolation circuit, input and output interface circuit, signal conditioning circuit and telecommunication circuit; Described D/A converting circuit, signal isolation circuit, input and output interface circuit, signal conditioning circuit, telecommunication circuit are connected with digital signal processor DSP; The output of described D/A converting circuit exports circuit control device to after by described signal power amplifying circuit.
The D/A chip MX7847 that described D/A converting circuit selects MAXIM company to release, it is the D/A converter part of 12 bit parallel inputs, binary channels output, two DAC have respectively an output amplifier and feedback resistance, can make reach ± 10V of the output voltage of amplifier by the load of a 2k Ω; D/A converting circuit has 7 road circuit, is respectively used to produce the half-sinusoid voltage signal of 120 ° of three tunnel phase phasic differences, and its amplitude, changeable frequency, simulate inverter three-phase output voltage signal; The half-wave voltage signal of 120 ° of frequencys multiplication of three tunnel phase phasic differences, its amplitude is variable, simulates inverter three-phase output current signal; One tunnel DC voltage simulating signal, its amplitude is variable, and the output voltage that carrys out analog D C/DC translation circuit is given; Producing 7 tunnel simulating signals needs 4 MX7847, adopts 38 code translator SN74HC138N to carry out sheet choosing to 4 MX7847; Described digital signal processor DSP connects MX7847 by parallel port line, controls output waveform.
As shown in Figure 3, Figure 4, Fig. 3 is the utility model ac output voltage simulating signal power amplification circuit; Fig. 4 is the utility model ac output current simulating signal power amplification circuit.Described DC/DC translation circuit is by pwm chip control; adopt the two closed loop control modes of current inner loop outer voltage to drive, for DC voltage conversion, power to controller on the one hand; can simulate the DC input voitage of inverter on the one hand, for direct current input overvoltage/undervoltage protection test.Described signal power amplifying circuit has adopted complementary push-pull power amplification circuit, have 6 tunnels, be respectively used to three-phase output voltage simulating signal and the three-phase output current simulating signal of D/A converting circuit output to carry out level conversion and power amplification, export circuit control device to, the closed loop circuit that the output signal of analog AC voltage sensor and AC current sensor is made up of LM358 is followed the tracks of and is controlled.
As shown in Figure 5, be the utility model controller guard signal testing circuit.Described signal isolation circuit will offer described digital signal processor DSP after the guard signal isolation of circuit control device pick-up unit; in the time that the protection of controller is moved; T1PWM mouth is set high, and DSP judges and record the protected data of circuit control device with this.
Pick-up unit is by RS485 interface and compunlcation, in order to make testing process there is alternative and automatism, individual event functional test and the automatic testing button of all functions are provided on controller pick-up unit host computer interface, as carry out individual event Function detection and only need click its corresponding START button and get final product start detection, if detection all functions are clicked " sequence detection ".After testing result has shown, clicking " printing " can preserve all data that detected and print, if will end current operation in test process, click " stopping ", pick-up unit just stops test and by system reset, " zero clearing " button is used for removing all demonstration data on interface.
Although the present invention with preferred embodiment openly as above; but they are not for limiting the present invention; do not departing under the prerequisite of the utility model spirit and scope; anyly have the knack of this skill person; without departing from the spirit and scope of the invention; can make various changes or retouch from working as, but equally within protection scope of the present invention.
Claims (9)
1. a circuit control device pick-up unit, is characterized in that: comprise digital signal processor DSP, DC/DC translation circuit, D/A converting circuit, signal power amplifying circuit, signal isolation circuit, input and output interface circuit, signal conditioning circuit and telecommunication circuit; Described D/A converting circuit, signal isolation circuit, input and output interface circuit, signal conditioning circuit, telecommunication circuit are connected with described digital signal processor DSP; The output of described D/A converting circuit exports circuit control device to after by described signal power amplifying circuit.
2. circuit control device pick-up unit according to claim 1, it is characterized in that: described DC/DC translation circuit is by pwm chip control, adopt the two closed loop control modes of current inner loop outer voltage to drive, realize the stable output of DC voltage, the DC input voitage of simulation inverter.
3. circuit control device pick-up unit according to claim 1, is characterized in that: described D/A converting circuit is selected D/A chip MX7847, simulates inverter three-phase output voltage signal, three-phase output current signal and d.c. input voltage signal; Described D/A converting circuit is 7 tunnels, and producing 7 tunnel simulating signals needs 4 MX7847, adopts 38 code translator SN74HC138N to carry out sheet choosing to 4 MX7847; Described digital signal processor DSP connects MX7847 by parallel port line, controls output waveform.
4. circuit control device pick-up unit according to claim 3, it is characterized in that: described MX7847 is the D/A converter part of 12 bit parallel inputs, binary channels output, two DAC have respectively an output amplifier and feedback resistance, can make reach ± 10V of the output voltage of amplifier by the load of a 2k Ω.
5. circuit control device pick-up unit according to claim 1, is characterized in that: described signal power amplifying circuit adopts complementary push-pull power amplification circuit, and the closed loop circuit being made up of LM358 is followed the tracks of and controlled; Described signal power amplifying circuit is 6 tunnels.
6. circuit control device pick-up unit according to claim 1, is characterized in that: described signal isolation circuit will offer described digital signal processor DSP after the guard signal isolation of circuit control device pick-up unit; Described signal isolation circuit is 1 tunnel.
7. circuit control device pick-up unit according to claim 1, it is characterized in that: described signal conditioning circuit Wei10 road, is respectively used to detect described circuit control device pick-up unit and simulates to the three-phase output voltage signal of circuit control device, effective value, d.c. input voltage signal and the inverter control plate output control signal effective value of three-phase output current signal.
8. circuit control device pick-up unit according to claim 1, is characterized in that: described circuit control device pick-up unit and computer expert cross serial line interface RS485 and complete data communication.
9. circuit control device pick-up unit according to claim 1, is characterized in that: single-chip microcomputer is selected dsp processor TMS320F2407.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420460910.3U CN203982188U (en) | 2014-08-14 | 2014-08-14 | Circuit control device pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420460910.3U CN203982188U (en) | 2014-08-14 | 2014-08-14 | Circuit control device pick-up unit |
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| Publication Number | Publication Date |
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| CN203982188U true CN203982188U (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420460910.3U Active CN203982188U (en) | 2014-08-14 | 2014-08-14 | Circuit control device pick-up unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411169A (en) * | 2015-07-30 | 2017-02-15 | 苏州大禾能源技术有限公司 | High-frequency inversion circuit based on digital-to-analog conversion |
| CN107247423A (en) * | 2017-05-24 | 2017-10-13 | 湖北三江航天万峰科技发展有限公司 | A kind of equivalent detection means of equipment |
-
2014
- 2014-08-14 CN CN201420460910.3U patent/CN203982188U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411169A (en) * | 2015-07-30 | 2017-02-15 | 苏州大禾能源技术有限公司 | High-frequency inversion circuit based on digital-to-analog conversion |
| CN107247423A (en) * | 2017-05-24 | 2017-10-13 | 湖北三江航天万峰科技发展有限公司 | A kind of equivalent detection means of equipment |
| CN107247423B (en) * | 2017-05-24 | 2019-11-19 | 湖北三江航天万峰科技发展有限公司 | A kind of equivalent detection device of equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181026 Address after: 210003 new model Road 38, Gulou District, Nanjing, Jiangsu Patentee after: Nanjing Automation Co., Ltd., China Electronics Corp. Address before: 210032 No. 9, Hui Da Road, Pukou hi tech Development Zone, Nanjing, Jiangsu Patentee before: NANJING GUODIAN NANZI RURAL POWER GRID AUTOMATION ENGINEERING CO., LTD. |