CN102096051B - Voltage correction circuit for detecting quench of high-temperature superconduction hybrid magnet - Google Patents
Voltage correction circuit for detecting quench of high-temperature superconduction hybrid magnet Download PDFInfo
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Abstract
本发明公开一种高温超导混合磁体失超检测的电压校正电路，具体涉及一种高温超导混合磁体失超检测的电压校正电路。包括超导混合磁体、电流传感器电路、微分电路、放大电路、差分放大电路和电压传感器电路，所述超导混合磁体的电流线路与电流传感器电路、微分电路、放大电路和差分放大电路依次连接，超导混合磁体的电压线路通过电压传感器电路与差分放大电路连接。本发明通过引入电压校正电路，能够消除不同电感量引起的感应电压，避免了误判的发生，本电路结构简单，所涉及到的电路均由模拟器件组成，易于实现。
The invention discloses a voltage correction circuit for quench detection of a high-temperature superconducting hybrid magnet, in particular to a voltage correction circuit for quench detection of a high-temperature superconducting hybrid magnet. Comprising a superconducting hybrid magnet, a current sensor circuit, a differential circuit, an amplifier circuit, a differential amplifier circuit and a voltage sensor circuit, the current circuit of the superconducting hybrid magnet is sequentially connected to the current sensor circuit, the differential circuit, the amplifier circuit and the differential amplifier circuit, The voltage circuit of the superconducting hybrid magnet is connected with the differential amplifier circuit through the voltage sensor circuit. By introducing a voltage correction circuit, the present invention can eliminate induced voltage caused by different inductances and avoid misjudgment. The circuit structure is simple, and the involved circuits are all composed of analog devices, which is easy to realize.
Description
Technical field
The present invention relates to a kind of testing circuit that is used for, be specifically related to a kind of voltage correction circuit of high-temperature superconductor hybrid magnet quench detection.
Background technology
Superconducting device in the electric system often runs into such as various dynamic processes such as system short-circuits, need bear the impact of Short-Circuit High Current, out-of-balance current, the superconducting power device may be because of bearing excessive short-circuit current effect quench, the quench of superconducting power device not only can change the electric parameter of superconducting power apparatus, safe, stable, economical operation to superconducting electric power system also will produce certain influence, be the major issues that the superconducting power apparatus technical applicationization remains to be furtherd investigate.
The basic process of quench is the process that the electromagnetic energy that will store changes heat energy into, the heat energy of transformation mainly by external move can resistance and coil in normal district absorb.On the one hand owing to quench is always put from certain, pass through ohm heat and heat conduction then to external diffusion, the location that changes normal state the earliest into is the longest in the time of Ohmic heating state, temperature rise is the highest, local overheating may be burnt insulation or fusing conductor, the while quench also may produce high voltage and cause insulation breakdown, the superconducting magnet quench is accompanied by magnet excess current and heating, if untimely taking measures shifted energy stored in the coil, these energy will dissipate by the form of coil with heat energy, and serious local temperature rise may damage magnet.On the other hand, generate heat after the superconducting magnet quench, cause liquid nitrogen volatilization, the low-temperature (low temperature) vessel internal pressure raises, and the intensity of wall has been proposed stern challenge.Thereby the quench problem that solves the high-temperature superconductor electric device is significant.
Present high-temperature superconductor hybrid magnet quench detection method is based on the active power detection method, this method is applicable to the superconducting magnet that same material is made, for hybrid magnet, the material therefor difference, then corresponding inductance value is also different, and it is also different to produce inductive drop in the change procedure of electric current, will comprise impedance voltage and induction reactance voltage two parts by the detected signal of active power detection method, if do not take measures, will cause erroneous judgement disconnected.
Summary of the invention
Can judge disconnected problem by accident when solving in the prior art superconducting device hybrid magnet quench detection, the invention provides a kind of voltage correction circuit at high-temperature superconductor hybrid magnet quench detection, concrete scheme is as follows: a kind of voltage correction circuit of high-temperature superconductor hybrid magnet quench detection, it is characterized in that, comprise the superconduction hybrid magnet, current sensor circuit, differentiating circuit, amplifying circuit, differential amplifier circuit and voltage sensor circuit, the current circuit of described superconduction hybrid magnet and current sensor circuit, differentiating circuit, amplifying circuit is connected successively with differential amplifier circuit, and the voltage circuit of superconduction hybrid magnet is connected with differential amplifier circuit by the voltage sensor circuit.
Another optimal way of the present invention: described superconduction hybrid magnet comprises the high temperature superconductor coil that a plurality of different materials are made, each high temperature superconductor coil is connected in series, the current circuit of described high temperature superconductor coil is connected with current sensor circuit, and voltage circuit is connected with the voltage sensor circuit.
Another optimal way of the present invention: described differentiating circuit comprises operational amplifier U1A, be connected with the current sensor incoming line behind serial connection gain capacitances C1 and the current-limiting resistance R2 on the pin 2 of operational amplifier U1A, connect building-out capacitor C2 between pin 1 and the pin 2, building-out capacitor C2 goes up gain resistor R1 in parallel, be connected with compensating resistance R3 on the pin 3, connect filter capacitor C3 on the pin 8, connect filter capacitor C4 on the pin 4.
Another optimal way of the present invention: described amplifying circuit comprises operational amplifier U1B, connecting adjusting resistance R 4 backs on the pin 6 of operational amplifier U1B is connected with the pin 1 of operational amplifier U1A, connect between pin 6 and the pin 7 and amplify resistance R 5, be serially connected with filter resistance R7, filter capacitor C5 on the pin 7, connect compensating resistance R6 on the pin 5.
Another optimal way of the present invention: described differential amplifier circuit comprises operational amplifier U2, connect on the pin 2 of operational amplifier U2 behind the current-limiting resistance R8 with filter resistance R7 output terminal on the amplifying circuit pin 7 and be connected, connect gain resistor R9 between pin 1 and the pin 8, pin 7 connects filter capacitor C6, connect filter capacitor C7 on the pin 4, pin 6 is connected with quench-detection circuit, is connected with the voltage sensor incoming line behind the connection current limliting R10 on the pin 3.
The present invention can eliminate the induced voltage that the different induction amount causes by introducing voltage correction circuit, has avoided the generation of erroneous judgement.This circuit structure is simple, and involved circuit is formed by analog device, is easy to realize.
Description of drawings
Fig. 1 correcting circuit synoptic diagram of the present invention
Fig. 2 correcting circuit connection diagram of the present invention.
Embodiment
As shown in Figure 1, correcting circuit of the present invention is connected between high-temperature superconductor hybrid magnet and the quench-detection circuit, correcting circuit of the present invention comprises the high-temperature superconductor hybrid magnet, the voltage sensor circuit, current sensor circuit, differentiating circuit, amplifying circuit and differential amplifier circuit, wherein the high temperature superconductor coil made by a plurality of different materials of high-temperature superconductor hybrid magnet is in series, the electric current of each high temperature superconductor coil passes to differentiating circuit through current sensor circuit, differentiating circuit is got differential value to the output of current sensor circuit, output is as the input of amplifying circuit, and the voltage of each high temperature superconductor coil is through the overvoltage sensor circuit, output behind the amplifying circuit is jointly as the input of active power testing circuit.
As shown in Figure 2, the design of this circuit is the induced electricity pressure reduction that produces on high-temperature superconductor hybrid magnet under the time-dependent current in order to eliminate, when high temperature superconductor coil not during quench, because the inductance value on the superconducting coil can produce induced voltage under time-dependent current, can eliminate the induced voltage of generation by voltage correction circuit.Differentiating circuit comprises operational amplifier U1A, operational amplifier U1A adopts TL082, TL082 is general junction field effect transistor dual operational amplifier, be connected with the current sensor incoming line behind serial connection gain capacitances C1 and the current-limiting resistance R2 on the pin 2 of operational amplifier U1A, current-limiting resistance R2 generally gets 10K, connect building-out capacitor C2 between pin 1 and the pin 2, play phase compensation, improve the stability of circuit.Building-out capacitor C2 goes up gain resistor R1 in parallel, and gain resistor R1 and gain capacitances C1 can be provided with the differential gain of building-out capacitor C2, are connected with compensating resistance R3 on the pin 3, to guarantee the symmetry of integrated transporting discharging input stage differential amplifier circuit.Connect filter capacitor C3 on the pin 8, connect filter capacitor C4 on the pin 4, filter capacitor C3, filter capacitor C4 generally get 0.1u.
Amplifying circuit comprises operational amplifier U1B, operational amplifier U1B adopts general junction field effect transistor dual operational amplifier TL082, connecting adjusting resistance R 4 backs on the pin 6 of operational amplifier U1B is connected with the pin 1 of operational amplifier U1A, connect between pin 6 and the pin 7 and regulate resistance R 5, the enlargement factor of regulating resistance R 4 and regulating resistance R 5 scalable operational amplifiers, be serially connected with the filter resistance R7, the filter capacitor C5 that strobe on the pin 7, be connected with on the pin 5 and guarantee the symmetric compensating resistance R6 of integrated transporting discharging input stage differential amplifier circuit.
Differential amplifier circuit comprises operational amplifier U2, that operational amplifier U2 adopts is the general purpose instrument amplifier INA128 of low power consumption high-precision, connect on the pin 2 of operational amplifier U2 behind the current-limiting resistance R8 with filter resistance R7 output terminal on the amplifying circuit pin 7 and be connected, be connected with the gain resistor R9 that can be provided with operational amplification circuit U2 gain between pin 1 and the pin 8, the scope of gain is general select ten times in.Pin 7 connects filter capacitor C6, connect filter capacitor C7 on the pin 4, filter capacitor C6, filter capacitor C7 generally get 0.1u, and pin 6 is connected with quench-detection circuit, be connected with the voltage sensor incoming line after connecting current-limiting resistance R10 on the pin 3, current-limiting resistance is generally got 10k.
More than be of the present invention specifying, it will be conspicuous carrying out suitable replacement to one skilled in the art or revise under not departing from the scope of the present invention, all within protection scope of the present invention.
Claims (3)
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| CN 200910242357 CN102096051B (en) | 2009-12-14 | 2009-12-14 | Voltage correction circuit for detecting quench of high-temperature superconduction hybrid magnet |
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| CN 200910242357 CN102096051B (en) | 2009-12-14 | 2009-12-14 | Voltage correction circuit for detecting quench of high-temperature superconduction hybrid magnet |
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| CN102096051B true CN102096051B (en) | 2013-07-31 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103777161B (en) * | 2012-10-17 | 2017-08-22 | 上海联影医疗科技有限公司 | The drop field circuit and method of superconducting magnet |
| CN106990370A (en) * | 2017-04-01 | 2017-07-28 | 张子仪 | A kind of isolated superconducting magnetic energy storage system quenches detection device |
| CN114487952A (en) * | 2022-04-14 | 2022-05-13 | 安徽中科昊音智能科技有限公司 | A quench detection system and method using acoustic fiber |
| CN118068243B (en) * | 2024-01-30 | 2024-08-13 | 中国科学院合肥物质科学研究院 | Wide-scale current variation digital differentiator and application thereof to superconducting magnet |
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| CN201130945Y (en) * | 2007-12-17 | 2008-10-08 | 南京吸铁石科技有限公司 | Apparatus capable of modulating and demodulating with variable speed |
| CN101446610A (en) * | 2008-11-25 | 2009-06-03 | 中国电力科学研究院 | Quench-detection circuit of high-temperature superconducting magnet |
| CN201336362Y (en) * | 2009-02-05 | 2009-10-28 | 中国电子科技集团公司第五十四研究所 | Miniature antenna digital servo device |
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| JP2004172485A (en) * | 2002-11-21 | 2004-06-17 | Nagoya Industrial Science Research Inst | Quenching detecting method and equipment of superconductive coil, |
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| US4996472A (en) * | 1989-08-31 | 1991-02-26 | Westinghouse Electric Corp. | Passive superconducting quench detection sensor |
| CN201130945Y (en) * | 2007-12-17 | 2008-10-08 | 南京吸铁石科技有限公司 | Apparatus capable of modulating and demodulating with variable speed |
| CN101446610A (en) * | 2008-11-25 | 2009-06-03 | 中国电力科学研究院 | Quench-detection circuit of high-temperature superconducting magnet |
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Non-Patent Citations (5)
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| JP特开2004-172485A 2004.06.17 |
| Mohamed A. Hilal, etc..Quench Detection of Multiple Magnet System.《IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY》.1994,第4卷(第3期),第109页右栏第1段、第111页右栏倒数第1-2段、第113页左栏第1段，图7（c）. |
| Mohamed A. Hilal, etc..Quench Detection of Multiple Magnet System.《IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY》.1994,第4卷(第3期),第109页左栏第2段、右栏第1段、第111页右栏倒数第1-2段、第113页左栏第1段，图7（c）. |
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| Quench Detection of Multiple Magnet System;Mohamed A. Hilal, etc.;《IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY》;19940930;第4卷(第3期);第109页左栏第2段、右栏第1段、第111页右栏倒数第1-2段、第113页左栏第1段，图7（c） * |
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