CN102175903B - Passive isolated direct current (DC) voltage detection device for urban railway vehicle - Google Patents
Passive isolated direct current (DC) voltage detection device for urban railway vehicle Download PDFInfo
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- CN102175903B CN102175903B CN 201110043061 CN201110043061A CN102175903B CN 102175903 B CN102175903 B CN 102175903B CN 201110043061 CN201110043061 CN 201110043061 CN 201110043061 A CN201110043061 A CN 201110043061A CN 102175903 B CN102175903 B CN 102175903B
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Abstract
The invention relates to a passive isolated DC voltage detection device for urban railway vehicle, comprising a voltage-division current-limit circuit performing voltage division and current limit for a DC high voltage of a power supply railway, a transformer feedback multiresonant oscillation circuit transforming the voltage divided and current limited DC voltage signal into an alternating current (AC) voltage signal, a rectifying filtering and load matching circuit performing rectification, filtering and load matching for the AC voltage signal outputted by the transformer feedback multiresonant oscillation circuit, and a piece of voltage display equipment, which are connected in turn. While detecting the DC voltage of the power supply railway, the device provided by the invention can realize passive work; and the device has good load matching performance and capacity of resisting disturbance.
Description
Technical field
The present invention relates to a kind of used for rail vehicle dc voltage detecting device, especially relate to a kind of city railway vehicle with passive isolated DC voltage check device.
Background technology
At present, the city railway vehicle such as subway and light rail car all adopts DC-voltage supply.Must detect in real time DC voltage when vehicle operating, be used for the operation of vehicle is controlled.The direct current voltage sensor of using on city railway vehicle is most of for active type, need rely on additional power source during work.
Summary of the invention
Must use the shortcoming of external power source work for overcoming existing city railway vehicle with dc voltage detecting device, the invention provides a kind of passive isolated form city railway vehicle dc voltage detecting device.
The technical solution adopted for the present invention to solve the technical problems is: it carries out the dividing potential drop current-limiting circuit of dividing potential drop current limliting by what connect in turn to the power supply rail high direct voltage, d. c. voltage signal after the dividing potential drop current limliting is converted to the transformer feedback multi-resonant oscillating circuit of ac voltage signal, the ac voltage signal of transformer feedback multi-resonant oscillating circuit output is carried out rectifier filter load match circuit and the voltage display device formation of rectification, filtering, load matched.
The present invention's passive isolated DC voltage check device can be used for the low-voltage dc voltage signal that the voltage display device correctly shows the power supply rail DC voltage.
The present invention adopts the step-down current-limiting circuit to carry out the step-down current limliting to the power supply rail d. c. voltage signal, d. c. voltage signal after utilizing the transformer feedback multi-resonant oscillating circuit to the step-down current limliting is isolated and changes, and the ac voltage signal of last transformer feedback multi-resonant oscillating circuit output is through the d. c. voltage signal of rectifier filter load Matching and modification circuit output with the linear ratio of tested railway voltage.
Because whole circuit adopts the analog element design, thereby break away from the dependence to external power source, realized passive work; Adopt the transformer multi-resonant oscillating circuit to realize isolation to signal, improved the antijamming capability of device; The load matched Circuit tuning makes whole device have good load matched performance.
The invention has the beneficial effects as follows, when the power supply rail DC voltage is detected, realized the passive work of whole device, tested voltage source and output signal are isolated, and have improved antijamming capability, have good load matched performance.Be conducive to improve the vehicle operating security performance.
Description of drawings
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is a kind of implementing circuit structural drawing of dividing potential drop current-limiting circuit shown in Figure 1.
Fig. 3 is a kind of implementing circuit structural drawing of transformer feedback resonant circuit shown in Figure 1.
Fig. 4 is a kind of implementing circuit structural drawing of rectifier filter load match circuit shown in Figure 1.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
With reference to Fig. 1, the present invention carries out the dividing potential drop current-limiting circuit of dividing potential drop current limliting by what connect in turn to the power supply rail high direct voltage, d. c. voltage signal after the dividing potential drop current limliting is converted to the transformer feedback multi-resonant oscillating circuit of ac voltage signal, the ac voltage signal of transformer feedback multi-resonant oscillating circuit output is carried out rectifier filter load match circuit and the voltage display device formation of rectification, filtering, load matched.
With reference to Fig. 2, described dividing potential drop current-limiting circuit comprises current-limiting resistor voltage divider R1, R2, R3, R4, R5, R6, R7, R8, R9, the R10 of tested DC input voitage connection terminal N1 and series connection successively, voltage sampling resistor R11 is in parallel with end current-limiting resistor voltage divider R10, after the dividing potential drop of direct current voltage signal process to be measured current-limiting resistor voltage divider, current limliting, be connected to stabilivolt ZD1, capacitor C 1 is parallel to stabilivolt ZD1 two ends, and direct current voltage to be measured enters transformer feedback resonant circuit (referring to Fig. 3) after dividing potential drop current limliting, voltage regulation filtering.
With reference to Fig. 3, d. c. voltage signal positive pole after described sampling is connected in series to the centre tap of T1. multi-harmonic-oscillations transformer primary side input end through inductance L 1, d. c. voltage signal positive pole after the sampling is connected to resonant resistance R12, the R13 two ends of two parallel connections simultaneously, resonant resistance R12, R13 series connection access multi-harmonic-oscillations transformer T1 primary coil input end of the same name in parallel; The input end of the same name of multi-harmonic-oscillations transformer T1 connects the b utmost point of recommending triode Q1, Q2 simultaneously, connects the input coil two ends, former limit that the e utmost point of recommending triode Q1, Q2 is connected respectively to multi-harmonic-oscillations transformer T1, and c is connected to negative pole extremely jointly.Zener diode ZD2 with recommend triode Q1, Zener diode ZD3. and to recommend triode Q2 respectively in parallel, the former limit input coil of T1 multi-harmonic-oscillations transformer is in parallel with resonant capacitance C2, this connects to form the transformer feedback resonant circuit.After the starting of oscillation of transformer feedback oscillatory circuit, the resistance of a fixed resistance value of equivalence, when transformer feedback oscillatory circuit input sampling change in voltage, the alternating voltage of transformer secondary is linear scaling accordingly to be changed.
With reference to Fig. 4, the alternating current that transformer T1 secondary produces enters respectively the anode of two commutation diode D1, D2, two commutation diode D1, D2 common cathodes connect, the alternating current that transformer T1 secondary produces is through after rectifies, namely become direct current, the cathode terminal link of commutation diode D1, D2 is the direct-flow positive voltage end, and the centre tap link of transformer T1 secondary is the DC voltage negative terminal.Resistance R 14 consists of the LRC filtering circuit with inductance L 2, capacitor C 3, and resistance R 14 is connected with the rectification circuit anode with the centre tap of transformer T1 secondary, forms filtering circuit; Load matched resistance R 15 be connected in parallel on filter capacitor C3 two ends after load matched pot VR1 connects, output signal is by load matched resistance R 15 and the output of load matched pot VR1 front of motor, connect external display device through connection terminal N2, because the resistance value of external display device itself is different, in the middle of practical application suitably the tunable arrangement on regulating load coupling pot VR1 change the access resistance value of load matched pot VR1, make on the externally display device that dc voltage value to be measured can be correct to show.
Claims (3)
1. a city railway vehicle is with passive isolated DC voltage check device, it is characterized in that, by what connect in turn, the power supply rail high direct voltage is carried out the dividing potential drop current-limiting circuit of dividing potential drop current limliting, d. c. voltage signal after the dividing potential drop current limliting is converted to the transformer feedback multi-resonant oscillating circuit of ac voltage signal, the ac voltage signal of transformer feedback multi-resonant oscillating circuit output is carried out rectifier filter load match circuit and the voltage display device formation of rectification, filtering, load matched;
Described dividing potential drop current-limiting circuit comprises tested DC input voitage connection terminal N1 and current-limiting resistor voltage divider R1, the R2, R3, R4, R5, R6, R7, R8, R9, the R10 that contact successively, voltage sampling resistor R11 is in parallel with end current-limiting resistor voltage divider R10, after the dividing potential drop of direct current voltage signal process to be measured current-limiting resistor voltage divider, current limliting, be connected to stabilivolt ZD1, capacitor C 1 is parallel to stabilivolt ZD1 two ends, and direct current voltage to be measured enters the transformer feedback multi-resonant oscillating circuit after dividing potential drop current limliting, voltage regulation filtering.
2. city railway vehicle according to claim 1 is with passive isolated DC voltage check device, it is characterized in that, d. c. voltage signal positive pole after described transformer feedback multi-resonant oscillating circuit sampling is connected in series to the centre tap of T1. multi-harmonic-oscillations transformer primary side input end through inductance L 1, d. c. voltage signal positive pole after the sampling is connected to resonant resistance R12, the R13 two ends of two parallel connections simultaneously, resonant resistance R12, R13 series connection access multi-harmonic-oscillations transformer T1 primary coil input end of the same name in parallel; The input end of the same name of multi-harmonic-oscillations transformer T1 connects the b utmost point of recommending triode Q1, Q2 simultaneously, and the e utmost point of recommending triode Q1, Q2 is connected respectively to the input coil two ends, former limit of multi-harmonic-oscillations transformer T1, and c is connected to negative pole extremely jointly; Zener diode ZD2 with recommend triode Q1, Zener diode ZD3 and to recommend triode Q2 respectively in parallel, the former limit input coil of T1 multi-harmonic-oscillations transformer is in parallel with resonant capacitance C2, this connects to form the transformer feedback multi-resonant oscillating circuit; After the starting of oscillation of transformer feedback multi-resonant oscillating circuit, the resistance of a fixed resistance value of equivalence, when transformer feedback multi-resonant oscillating circuit input sampling change in voltage, the alternating voltage of transformer secondary is linear scaling accordingly to be changed.
3. city railway vehicle according to claim 1 and 2 is with passive isolated DC voltage check device, it is characterized in that, described rectifier filter load match circuit feature is that the alternating current that transformer T1 secondary produces enters respectively two commutation diode D1, the anode of D2, two commutation diode D1, the D2 common cathode connects, the alternating current that transformer T1 secondary produces is through after rectifies, namely become direct current, commutation diode D1, the cathode terminal link of D2 is the direct-flow positive voltage end, the centre tap link of transformer T1 secondary is the negative DC voltage end, resistance R 14 consists of the LRC filtering circuit with inductance L 2, capacitor C 3, and resistance R 14 is connected with the rectification circuit anode with the centre tap of transformer T1 secondary, forms filtering circuit, load matched resistance R 15 be connected in parallel on filter capacitor C3 two ends after load matched pot VR1 connects, output signal connects external display device by load matched resistance R 15 and the output of load matched pot VR1 front of motor through connection terminal N2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110043061 CN102175903B (en) | 2011-02-23 | 2011-02-23 | Passive isolated direct current (DC) voltage detection device for urban railway vehicle |
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| CN 201110043061 CN102175903B (en) | 2011-02-23 | 2011-02-23 | Passive isolated direct current (DC) voltage detection device for urban railway vehicle |
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| CN102175903A CN102175903A (en) | 2011-09-07 |
| CN102175903B true CN102175903B (en) | 2013-06-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102944719B (en) * | 2012-11-16 | 2015-12-09 | 大连丰和日丽电气有限公司 | Passive direct-current voltage transducer |
| CN103383405B (en) * | 2013-07-10 | 2016-04-27 | 珠海许继芝电网自动化有限公司 | A kind of passive signal voltage detection method |
| CN111381085B (en) * | 2020-04-16 | 2022-08-12 | 上海轨道交通检测认证(集团)有限公司 | Passive isolation type direct current voltage detection device for urban rail vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2137363Y (en) * | 1992-06-23 | 1993-06-30 | 南昌有色冶金设计研究院 | Dc voltage isolated measuring device |
| CN1755743A (en) * | 2005-09-08 | 2006-04-05 | 广州汉为电子科技有限公司 | Passive electromagnetic isolated signal converter |
| CN201282419Y (en) * | 2008-10-21 | 2009-07-29 | 湘潭电机股份有限公司 | DC voltage converter |
| CN101644727A (en) * | 2008-08-07 | 2010-02-10 | 厦门安达兴电气有限公司 | High-voltage detector |
-
2011
- 2011-02-23 CN CN 201110043061 patent/CN102175903B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2137363Y (en) * | 1992-06-23 | 1993-06-30 | 南昌有色冶金设计研究院 | Dc voltage isolated measuring device |
| CN1755743A (en) * | 2005-09-08 | 2006-04-05 | 广州汉为电子科技有限公司 | Passive electromagnetic isolated signal converter |
| CN101644727A (en) * | 2008-08-07 | 2010-02-10 | 厦门安达兴电气有限公司 | High-voltage detector |
| CN201282419Y (en) * | 2008-10-21 | 2009-07-29 | 湘潭电机股份有限公司 | DC voltage converter |
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