CN201166685Y - Wide band high voltage intelligent resistance voltage division type voltage sensor - Google Patents
Wide band high voltage intelligent resistance voltage division type voltage sensor Download PDFInfo
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- CN201166685Y CN201166685Y CNU2008200523019U CN200820052301U CN201166685Y CN 201166685 Y CN201166685 Y CN 201166685Y CN U2008200523019 U CNU2008200523019 U CN U2008200523019U CN 200820052301 U CN200820052301 U CN 200820052301U CN 201166685 Y CN201166685 Y CN 201166685Y
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Abstract
The utility model discloses a wide-frequency and high-voltage intelligent resistor divider voltage sensor which is composed of the following components: a resistive voltage divider (1) used for taking out voltage signals from a tested voltage circuit, a high voltage side signal processing device (2) used for converting analog voltage signals output by the resistive voltage divider (1) into digital signals and carrying out arithmetic processing, a fiber communication group (5) used for connecting the high voltage side signal processing device (2) with a low voltage side digital display terminal (6), a high voltage side power supply (3) used for providing working power supply to the high voltage side signal processing device (2) and a high voltage isolating transformer (4) used for connecting the high voltage side power supply (3) with a low voltage side power supply network. The wide-frequency and high-voltage intelligent resistor divider voltage sensor has the advantages of wide frequency response range, AC and DC general use, wide validity test range, no magnetic saturation problem, high measuring precision, high voltage-resistance, high linearity, low temperature drift, easy calibration and strong anti-interference ability. The wide-frequency and high-voltage intelligent resistor divider voltage sensor is applicable to places such as electric machine producing enterprises, electric machine research centers, electric machine testing centers, etc.
Description
Technical field
The present invention relates to a kind of wide band high voltage intelligent electric resistance partial pressure type voltage sensor that is used for alternating current-direct current, variable-frequency motor measurement.
Background technology
Along with the development of converter technique, variable-frequency motor is used widely, because wide and contain complicated higher hamonic wave to the variable-frequency power sources reference frequency output of variable-frequency motor power supply, traditional mutual inductor can not satisfy electric parameters testing.Hall voltage sensor test frequency range broad, can satisfy the fundamental voltage test of variable-frequency motor preferably, but test bandwidth at present usually less than 15kHz, especially the Hall voltage sensor test bandwidth more than the 3000V electric pressure still can not accurately be measured for the higher hamonic wave of variable-frequency motor voltage signal usually less than 5kHz.Resistance divider has good frequency characteristic and linearity, but because output without isolation, generally is used as vdct with resistance divider at present, or pulse voltage, or the surge voltage test, one termination the earth when its common feature is test.In prior art, also do not adopt resistance divider to replace the voltage sensor that traditional mutual inductor is used for the frequency-changing AC high voltage test.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, provide that a kind of frequency response range is wide, AC/DC universal, Validity Test wide ranges, no magnetic saturation problem, measuring accuracy height, high linear, low temperature float easy calibration, isolation voltage height, wide band high voltage intelligent electric resistance partial pressure type voltage sensor that antijamming capability is strong.
Technical scheme of the present invention is: utilize resistance divider good frequency characteristic and linearity, adopt resistance divider to replace the senser element of traditional mutual inductor as the ac high voltage test, metering circuit and resistance divider are combined closely, adopt floating ground structure, measurement data is uploaded to low-pressure side digital display terminal in the digital quantity mode by optical fiber and realizes signal transmission and high pressure isolation.
The present invention is made of following assembly: a resistance divider (1) that is used for taking out from tested voltage circuit voltage signal, analog voltage signal that is used for resistance divider (1) output changes the digital signal high-side signal treating apparatus (2) that row operation handles of going forward side by side into, one group of communication optical fiber group (5) that connects high-side signal treating apparatus (2) and low-pressure side digital display terminal (6), one is the high-pressure side power supply (3) that high-side signal treating apparatus (2) provides working power, a high voltage isolating transformer (4) that connects high-pressure side power supply (3) and low-pressure side power supply grid.
Described resistance divider (1) is made up of high-voltage arm resistance R 1 and low-voltage arm resistance R2, and R1 and R2 are noninductive resistance, and together is encapsulated in the shielded metal tube of insulating material embedding.
The former limit of described high voltage isolating transformer (4) and secondary are connected with low-pressure side power supply grid and high-pressure side power supply (3) respectively.
Described high-side signal treating apparatus (2) is made up of AD converter IC1, microprocessor IC2, serial data transmitter 2C.
Described high-side signal treating apparatus (2) also comprises a kind of among sampling clock receiver 2A or the Gbps serial receiver 2B or their combination.
Described communication optical fiber group (5) is made up of at least one communication optical fiber 5C, and communication optical fiber 5C is connected with serial data transmitter 2C and low-pressure side digital display terminal (6) in the high-side signal treating apparatus (2).
Described communication optical fiber group (5) also comprises one or their combination among communication optical fiber 5A or the communication optical fiber 5B, wherein communication optical fiber 5A is connected with sampling clock receiver 2A and low-pressure side digital display terminal (6), and communication optical fiber 5B is connected with Gbps serial receiver 2B and low-pressure side digital display terminal (6).
The present invention has that frequency response range is wide, AC/DC universal, Validity Test wide ranges, no magnetic saturation problem, measuring accuracy height, high linear, advantage such as low temperature floats, easily calibration, isolation voltage height, antijamming capability are strong, is suitable for places uses such as motor manufacturing enterprise, motor research and motor inspection center.
Description of drawings
Fig. 1 is the utility model functional-block diagram;
Fig. 2 is the circuit diagram of embodiment 1;
Fig. 3 is the circuit diagram of embodiment 2;
Fig. 4 is the circuit diagram of embodiment 3;
Fig. 5 is the circuit diagram of embodiment 4;
Fig. 6 is the circuit diagram of embodiment 5.
Among the figure: 1-resistance divider, 2-high-side signal treating apparatus, 3-high-pressure side power supply, 4-high voltage isolating transformer, 5-communication optical fiber group, 6-low-pressure side digital display terminal.
Among Fig. 6: S1-1 wide band high voltage intelligent electric resistance partial pressure type voltage sensor, S2-2 wide band high voltage intelligent electric resistance partial pressure type voltage sensor.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
Microprocessor IC2 and IC3 have all used serial data receiving end RXD0 and serial data transmit port TXD0 in following examples, for convenience of description, are labeled as 2-RXD0,2-TXD0,6-RXD0,6-TXD0 among the figure respectively; Also adopt serial data receiving end RXD1 and the serial data transmit port TXD1 of IC3 among the embodiment 5, be labeled as 6-RXD1,6-TXD1.
Embodiment 1: see figures.1.and.2:
Present embodiment comprises the resistance divider (1) that takes out voltage signal from tested voltage circuit, high-side signal treating apparatus (2), high-pressure side power supply (3), high voltage isolating transformer (4), communication optical fiber group (5), low-pressure side digital display terminal (6).
Present embodiment low-pressure side power supply grid adopts the AC220V civil power.
Resistance divider (1) is as the voltage sensor device, to be connected on V+, analog voltage signal after the tested voltage signal dividing potential drop at V-two ends inserts high-side signal treating apparatus (2), the analog voltage signal that high-side signal treating apparatus (2) is exported resistance divider (1) changes digital signal union processing back into and is uploaded to low-pressure side digital display terminal (6) by optical fibre set (5), high-pressure side power supply (3) provides working power for high-side signal treating apparatus (2), and the former limit of high voltage isolating transformer (4) and secondary link to each other with AC220V civil power and high-pressure side power supply (3) respectively.
Resistance divider (1) comprises high-voltage arm resistance R 1 and low-voltage arm resistance R2, in the present embodiment, R1 adopts 6M Ω/30W high voltage precision noninductive resistance, maximum operating voltage reaches 70kV, and R2 adopts the accurate noninductive resistance of 3k Ω/0.25W, and R1 and R2 are encapsulated in the shielding copper pipe 1A, 1A is interior with epoxy resin 1B insulation embedding, the highest VDCT volts ,direct-current ,test can reach 20kV, and the highest alternating-current measurement voltage can reach 14kV, can satisfy the various operating mode voltage testers of 10kV alternating current-direct current, variable-frequency motor.
High-side signal treating apparatus (2) is made up of AD converter IC1, microprocessor IC2, sampling clock receiver 2A, Gbps serial receiver 2B and serial data transmitter 2C, IC1 adopts 16 bit A/D converter AD7656 in the present embodiment, IC2 adopts single chip computer AT MEGA162,2A and 2B adopt fiber optic receiver HFBR-2521, and 2C adopts fiber optic transmitter HFBR-1521.The control line of IC1 and data line link to each other with IC2, IC1 contains A/D conversion starting signal CONVSTA, CONVSTA links to each other with sampling clock receiver 2A, the two ends of the low-voltage arm resistance R2 of resistance divider (1) link to each other with input end of analog signal AIN and the simulation ground AGND of IC1 respectively, the serial data receiving port 2-RXD0 of IC2 links to each other with Gbps serial receiver 2B, and the serial data transmit port 2-RXD0 of IC2 links to each other with serial data transmitter 2C.
In the present embodiment, high-pressure side power supply (3) adopts the typical linear power supply, constitute (having omitted devices such as filter capacitor among the figure) by transformer T1, rectifier bridge B1, B2 and three-terminal regulator block V1, V2, V3 etc., for high-side signal treating apparatus (2) provides working power.
The former limit of high voltage isolating transformer (4) and secondary are connected with AC220V civil power and high-pressure side power supply (3) respectively, in the present embodiment, the former limit of high voltage isolating transformer (4) and the secondary turn ratio are 1: 1, the isolation of former limit and secondary is withstand voltage to be not less than 20kV, the high-tension measurement side (comprise tested voltage circuit, resistance divider 1, high-side signal handle adorn 2, high-pressure side power supply 3) and the AC220V civil power between play the high pressure buffer action.
Present embodiment low-pressure side digital display terminal (6) is made up of sampling clock transmitter 6A, serial data transmitter 6B, Gbps serial receiver 6C, microprocessor IC3 and data presentation device 6D, 6A and 6B adopt fiber optic transmitter HFBR-1521, electrify/the light transformation, 6C adopts fiber optic receiver HFBR-2521, play light/electric transformation, IC3 adopts single-chip microcomputer CY7C68013, and 6D adopts computing machine.The electric signal input end of sampling clock transmitter 6A links to each other with the T0OUT pin of microprocessor IC3, the electric signal input end of serial data transmitter 6B links to each other with the 6-TXD0 of microprocessor IC3, and the electrical signal of Gbps serial receiver 6C links to each other with the 6-RXD0 of microprocessor IC3; CY7C68013 contains a USB communication interface, adopts USB cable to be connected between microprocessor IC3 and the computing machine 6D, realization high-speed data communications between the two.
Present embodiment communication optical fiber group (5) is made up of three communication optical fiber 5A, 5B, 5C, 5A connects 2A and 6A, 5B connects 2B and 6B, 5C connects 2C and 6C, and communication optical fiber group (5) plays data communication between high-side signal treating apparatus (2) and low-pressure side digital display terminal (6) and high pressure is isolated.
Principle of work is as follows:
Tested voltage produces peak value through resistance divider (1) dividing potential drop and is input to A/D converter IC1 less than the 10V voltage signal, IC3 produces sampled clock signal through 6A, 5A, the A/D conversion starting signal CONVSTA of 2A control IC1, start the A/D conversion, during the A/D EOC, IC2 reads the A/D transformation result, and the A/D transformation result carried out calculation process, data after the calculation process in the asynchronous serial mode through 2C, 5C, 6C is uploaded to the IC3 of low-pressure side digital display terminal (6), IC3 will upload computing machine 6D by USB cable after the data processing that receive again, and computing machine 6D shows the real effective of tested voltage signal as required, the first-harmonic effective value, frequency, irregularity of wave form and real-time waveform etc.
Passing to IC3, IC3 under the various steering orders that computing machine 6D also can will need to be provided with by USB cable will instruct by reaching the IC2 of high-side signal treating apparatus (2) under 6B, 5B, the 2B again, in order to guarantee the communication reliability, also will reply instruction and be uploaded to IC3 by 2C, 5C, 6C after receiving instruction, IC3 will reply instruction again and be uploaded to computing machine 6D by USB cable.The typical case uses, wide band high voltage intelligent electric resistance partial pressure type voltage sensor can adopt multiple kinds, the agreement that can select wherein a kind of user to be familiar with by this method setting, or wide band high voltage intelligent electric resistance partial pressure type voltage sensor is uploaded information and can be comprised transient data bag, steady state data bag etc. or full detail, by the data upload that this method setting can only select the user to be concerned about, simplify the data communication of low-pressure side digital display terminal (6).
Embodiment 2:
With reference to omitted among the accompanying drawing 3:(figure with Fig. 2 in identical resistance divider 1, high-pressure side power supply 3, high voltage isolating transformer 4)
Present embodiment as different from Example 1, wide band high voltage intelligent electric resistance partial pressure type voltage sensor is indifferent to the sampling instant of measured signal in the present embodiment, promptly do not need to sample with other signal Synchronization or make phase correlation, Gu high-side signal treating apparatus (2) saves sampling clock receiver 2A, communication optical fiber group (5) is saved communication optical fiber 5A, low-pressure side digital display terminal (6) is saved sampling clock transmitter 6A, A/D conversion starting signal CONVSTA with A/D converter IC1 directly links to each other with the clock output pin OC1A of microprocessor IC2 simultaneously, provides sampled clock signal by IC2.
Embodiment 3:
With reference to omitted among the accompanying drawing 4:(figure with Fig. 2 in identical resistance divider 1, high-pressure side power supply 3, high voltage isolating transformer 4)
Present embodiment as different from Example 1, wide band high voltage intelligent electric resistance partial pressure type voltage sensor need not to be provided with various instructions in the present embodiment, Gu high-side signal treating apparatus (2) can save Gbps serial receiver 2B, communication optical fiber group (5) can be saved communication optical fiber 5B, low-pressure side digital display terminal (6) can be saved serial data transmitter 6B.
Embodiment 4:
With reference to omitted among the accompanying drawing 5:(figure with Fig. 2 in identical resistance divider 1, high-pressure side power supply 3, high voltage isolating transformer 4)
Present embodiment as different from Example 1, wide band high voltage intelligent electric resistance partial pressure type voltage sensor both had been indifferent to the sampling instant of measured signal in the present embodiment, do not need the user that it is carried out various instruction settings yet, Gu high-side signal treating apparatus (2) saves sampling clock receiver 2A, Gbps serial receiver 2B, communication optical fiber group (5) is saved communication optical fiber 5A, 5B, and low-pressure side digital display terminal (6) is saved sampling clock transmitter 6A, serial data transmitter 6B.
Embodiment 5:
With reference to Fig. 1, Fig. 2 and Fig. 6:
Present embodiment adopts two wide band high voltage intelligent electric resistance partial pressure type voltage sensors that the instantaneous value of three-phase line voltage Uab, the Ucb of three-phase alternating current, Uac and effective value etc. are measured, S1 is No. 1 wide band high voltage intelligent electric resistance partial pressure type voltage sensor among the figure, and S2 is No. 2 wide band high voltage intelligent electric resistance partial pressure type voltage sensors.
High-side signal treating apparatus (2) among S1, the S2 is identical with high-side signal treating apparatus (2) among Fig. 2.
Comprise two cover communication optical fiber groups in the present embodiment, three in every cover is designated as 5A1,5B1,5C1,5A2,5B2,5C2 respectively.
Present embodiment low-pressure side digital display terminal (6) is by sampling clock transmitter 6A1,6A2, serial data transmitter 6B1,6B2, Gbps serial receiver 6C1,6C2, microprocessor IC3 and data presentation device 6D form, described 6A1,6B1,6A2,6B2 adopt fiber optic transmitter HFBR-1521,6C1,6C2 adopt fiber optic receiver HFBR-2521, and IC3 adopts single-chip microcomputer CY7C68013, and 6D adopts computing machine.The electric signal input end of sampling clock transmitter 6A1,6A2 links together and links to each other with the T0OUT pin of microprocessor IC3.The electric signal input end of serial data transmitter 6B1 links to each other with the 6-TXD0 of microprocessor IC3, the electric signal input end of serial data transmitter 6B2 links to each other with the 6-TXD1 of microprocessor IC3, the electrical signal of Gbps serial receiver 6C1 links to each other with the 6-RXD0 of microprocessor IC3, and the electrical signal of Gbps serial receiver 6C2 links to each other with the 6-RXD1 of microprocessor IC3; CY7C68013 contains a USB communication interface, adopts USB cable to be connected between microprocessor IC3 and the computing machine 6D, realization high-speed data communications between the two.
Measuring principle:
The measuring-signal input end of wide band high voltage intelligent electric resistance partial pressure type voltage sensor S1 links to each other with Ua, the Ub of tested three-phase alternating current, the measuring-signal input end of wide band high voltage intelligent electric resistance partial pressure type voltage sensor S2 links to each other with Uc, the Ub of tested three-phase alternating current, the sampling clock transmitter 6A1 of described S1, S2 and the electric signal input end of 6A2 link together, the sampling clock source that is S1, S2 is identical, the IC1 of the high-side signal treating apparatus (2) of S1, S2 is under the control in same sampling clock source, and Uab, the Ucb to three-phase line voltage carries out synchronized sampling respectively.For each instantaneous value of same sampling instant, Uac=Uab-Ucb, the IC3 of low-pressure side digital display terminal obtains all instantaneous values of Uab, Ucb, Uac thus, again according to the calculating principle of effective value, calculate the effective value of Uab, Ucb, Uac, other as irregularity of wave form etc., measuring principle is identical.
The foregoing description is by the China Metrology Accreditation of relevant department, and its measuring accuracy is better than 0.2 grade; Voltage follow-on test scope is 0～11kV, and short-time overload voltage reaches 14kV; Signal bandwidth is DC～100kHz; The highest sample frequency is 250kHz; Serial transmission speed is 2Mbps; Isolation voltage is not less than 20kV.
In the foregoing description,, and improve the dielectric voltage withstand of high voltage isolating transformer (4), can further improve test voltage if change the intrinsic standoff ratio of resistance divider (1).
Claims (7)
1. wide band high voltage intelligent electric resistance partial pressure type voltage sensor, it is characterized in that, constitute by following assembly: a resistance divider (1) that is used for taking out voltage signal from tested voltage circuit, analog voltage signal that is used for resistance divider (1) output changes the digital signal high-side signal treating apparatus (2) that row operation handles of going forward side by side into, one group of communication optical fiber group (5) that connects high-side signal treating apparatus (2) and low-pressure side digital display terminal (6), one is the high-pressure side power supply (3) that high-side signal treating apparatus (2) provides working power, a high voltage isolating transformer (4) that connects high-pressure side power supply (3) and low-pressure side power supply grid.
2. wide band high voltage intelligent electric resistance partial pressure type voltage sensor according to claim 1, it is characterized in that described resistance divider (1) is made up of high-voltage arm resistance R 1 and low-voltage arm resistance R2, described R1 and R2 are noninductive resistance, and together are encapsulated in the shielded metal tube of insulating material embedding.
3. wide band high voltage intelligent electric resistance partial pressure type voltage sensor according to claim 1 is characterized in that the former limit of described high voltage isolating transformer (4) and secondary are connected with low-pressure side power supply grid and high-pressure side power supply (3) respectively.
4. wide band high voltage intelligent electric resistance partial pressure type voltage sensor according to claim 1 is characterized in that described high-side signal treating apparatus (2) is made up of AD converter IC1, microprocessor IC2, serial data transmitter 2C.
5. wide band high voltage intelligent electric resistance partial pressure type voltage sensor according to claim 4 is characterized in that described high-side signal treating apparatus (2) also comprises a kind of among sampling clock receiver 2A or the Gbps serial receiver 2B or their combination.
6. wide band high voltage intelligent electric resistance partial pressure type voltage sensor according to claim 1, it is characterized in that, described communication optical fiber group (5) is made up of at least one communication optical fiber 5C, and communication optical fiber 5C is connected with serial data transmitter 2C and low-pressure side digital display terminal (6) in the high-side signal treating apparatus (2).
7. wide band high voltage intelligent electric resistance partial pressure type voltage sensor according to claim 6, it is characterized in that, described communication optical fiber group (5) also comprises one or their combination among communication optical fiber 5A or the communication optical fiber 5B, wherein communication optical fiber 5A is connected with sampling clock receiver 2A and low-pressure side digital display terminal (6), and communication optical fiber 5B is connected with Gbps serial receiver 2B and low-pressure side digital display terminal (6).
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| CNU2008200523019U CN201166685Y (en) | 2008-02-15 | 2008-02-15 | Wide band high voltage intelligent resistance voltage division type voltage sensor |
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| CNU2008200523019U CN201166685Y (en) | 2008-02-15 | 2008-02-15 | Wide band high voltage intelligent resistance voltage division type voltage sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048513A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Self-insurance wide-frequency voltage signal collecting device |
| CN103424590A (en) * | 2012-05-15 | 2013-12-04 | 苏州工业园区新宏博通讯科技有限公司 | Voltage sampling circuit for automatic reclosing lock |
| CN107121583A (en) * | 2017-06-30 | 2017-09-01 | 中国西电电气股份有限公司 | A kind of noninductive resistance unit |
| US9797932B2 (en) | 2014-06-11 | 2017-10-24 | Delta Electronics (Shanghai) Co., Ltd. | Voltage sampling system |
| CN108872676A (en) * | 2018-06-04 | 2018-11-23 | 华北电力大学 | A kind of substation bus bar duplex frequency voltage measuring device |
-
2008
- 2008-02-15 CN CNU2008200523019U patent/CN201166685Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048513A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Self-insurance wide-frequency voltage signal collecting device |
| CN103424590A (en) * | 2012-05-15 | 2013-12-04 | 苏州工业园区新宏博通讯科技有限公司 | Voltage sampling circuit for automatic reclosing lock |
| US9797932B2 (en) | 2014-06-11 | 2017-10-24 | Delta Electronics (Shanghai) Co., Ltd. | Voltage sampling system |
| CN107121583A (en) * | 2017-06-30 | 2017-09-01 | 中国西电电气股份有限公司 | A kind of noninductive resistance unit |
| CN108872676A (en) * | 2018-06-04 | 2018-11-23 | 华北电力大学 | A kind of substation bus bar duplex frequency voltage measuring device |
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Owner name: ZHANG HAIYAN Free format text: FORMER OWNER: XU WEIZHUAN Effective date: 20090612 |
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Effective date of registration: 20090612 Address after: Hunan province Changsha Kaifu District, garden ginkgo court 18 building room 1108, zip code: 410073 Patentee after: Zhang Haiyan Address before: Hunan province Changsha Kaifu District Sifangping, Ginkgo Garden Court 18 Building No. 1108, zip code: 410073 Patentee before: Xu Weizhuan |
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