CN109217669B - Superconducting magnet power supply circuit - Google Patents
Superconducting magnet power supply circuit Download PDFInfo
- Publication number
- CN109217669B CN109217669B CN201811185315.2A CN201811185315A CN109217669B CN 109217669 B CN109217669 B CN 109217669B CN 201811185315 A CN201811185315 A CN 201811185315A CN 109217669 B CN109217669 B CN 109217669B
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- circuit
- power unit
- superconducting magnet
- current
- diode
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- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 230000015556 catabolic process Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 6
- 238000010791 quenching Methods 0.000 abstract description 6
- 230000000171 quenching effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a superconducting magnet power supply circuit, which comprises an AC/DC rectifying circuit for converting alternating current into direct current and a DC/DC circuit which is connected in series with the output end of the AC/DC rectifying circuit and is used for adjusting the direct current, wherein the DC/DC circuit comprises a first power unit IG1, a second power unit IG2, a diode D1, a current sensor CS1, a filter inductor L1, a filter capacitor C1 and a normally-closed contactor Q1, the collector of the first power unit IG1 is used as the positive electrode input end of the DC/DC circuit and is connected with the negative electrode end of the diode D1, so that the charging and discharging control of a superconducting magnet can be effectively controlled, and meanwhile, an energy feedback grid mode is adopted for discharging and quenching the superconducting magnet, so that electric energy can be saved, an additional protection device is not needed for system power failure, the power device and the diode of the circuit are utilized to release energy in a follow current, extra cost and space placement are saved, the protection of the superconducting magnet can be effectively improved, and the damage to the superconducting magnet and the superconducting magnet can be reduced.
Description
Technical Field
The invention relates to the technical field of circuit protection, in particular to a superconducting magnet power supply circuit.
Background
The superconducting magnet has the advantages of low power consumption, high magnetic field, high stability and the like, and is widely applied to the fields of electric power, industry, scientific research, medical treatment and the like;
however, strict requirements are imposed on the rising rate and the falling rate of the current, if the charging current rate is too fast, the magnet is quenched, and the energy release of the superconducting magnet becomes a key difficulty when the system is powered down, and in the current market technology, a resistor cabinet energy consumption mode is adopted for the discharge, quenching and power-down protection of the superconducting magnet, so that extra cost and space placement are increased, and meanwhile, the energy consumption mode is not environment-friendly;
therefore, the superconducting magnet power supply circuit is provided for the abnormal protection of the charging and discharging control, quench, system power failure and the like of the superconducting magnet from the superconducting magnet power supply.
Disclosure of Invention
The invention provides a superconducting magnet power supply circuit, which adopts an energy feedback power grid mode aiming at the discharge and quench of a superconducting magnet, so that the electric charge can be saved; aiming at the power failure of the system, an additional protection device is not needed, and the power device and the diode of the circuit are utilized to release energy in a follow current manner, so that the additional cost and the space are saved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a superconducting magnet power supply circuit, includes the AC/DC rectifier circuit that is used for alternating current to change direct current to and establish ties in the DC/DC rectifier circuit output and be used for adjusting direct current's DC/DC circuit, DC/DC circuit includes first power unit IG1, second power unit IG2, diode D1, current sensor CS1, filter inductance L1, filter capacitor C1 and normally closed contactor Q1, wherein:
the collector of the first power unit IG1 is used as the positive input end of the DC/DC circuit and is connected with the negative end of the diode D1, the emitter of the first power unit IG1 is connected with the collector of the second power unit IG2, the midpoints of the first power unit IG1 and the second power unit IG2 are connected with the first end of the current sensor CS1, the filter inductor L1 and the filter capacitor C1 are sequentially connected in series, the filter capacitor C1 is used as the output end of the DC/DC circuit, the emitter of the second power unit IG2 is connected with the first end of the normally-closed contactor Q1 and is used as the negative input end of the DC/DC circuit, and the second end of the normally-closed contactor Q1 is respectively connected with the positive end of the diode D1 and the filter capacitor C1.
Further, the first power unit IG1 and the second power unit IG2 are IGBT power modules with model number FF1400R12IP 4.
Further, the breakdown voltage of the diode D1 is greater than the maximum voltage of the collector of the first power unit IG 1.
Further, the normally closed contactor Q1 is of the type EVR400-B.
Further, the working frequency or capacitance of the filter capacitor C1 is 500uF.
According to the technical scheme, the invention has the following beneficial effects: the superconducting magnet charging and discharging control can be effectively controlled, meanwhile, an energy feedback power grid mode is adopted for discharging and quenching of the superconducting magnet, electric energy can be saved, an additional protection device is not required to be added for power failure of a system, energy is released by utilizing a circuit self power device and a diode freewheel, additional cost and space placement are saved, protection of the superconducting magnet can be effectively improved, and damage to circuit elements and the superconducting magnet is reduced.
Drawings
FIG. 1 is a schematic diagram of an overall circuit frame of the present invention;
FIG. 2 is a schematic diagram of a DC/DC circuit;
FIG. 3 is a schematic diagram of a DC/DC circuit charge protection;
fig. 4 is a schematic diagram illustrating the conduction of the first power unit IG1 in the charge protection circuit;
FIG. 5 is a schematic diagram illustrating the conduction of the second power unit IG2 in the charge protection circuit;
FIG. 6 is a schematic diagram of a DC/DC circuit discharge protection;
FIG. 7 is a schematic diagram illustrating the turn-on of the first power cell IG1 in the discharge protection circuit;
FIG. 8 is a schematic diagram illustrating the second power IG2 in the discharge protection circuit;
fig. 9 is a schematic diagram of a DC/DC circuit protection configuration for a superconducting magnet power supply powered down.
Detailed Description
A preferred embodiment of a superconducting magnet power supply circuit of the present invention will be described in detail with reference to the accompanying drawings.
1-2, a superconducting magnet power supply circuit comprises an AC/DC rectifying circuit and a DC/DC circuit, wherein the input end of the AC/DC rectifying circuit is connected with an AC circuit, the output end of the AC/DC rectifying circuit is connected with the input end of the DC/DC circuit, the AC/DC rectifying circuit is utilized to convert the AC circuit into a DC circuit, the DC circuit is provided with the DC/DC circuit, meanwhile, a DSP control board and a full-color touch screen man-machine interaction interface can be added to the AC/DC rectifying circuit and the DC/DC circuit according to actual needs, state parameters and faults of system operation can be displayed in real time, and a user can set required current and current change rate through a display screen;
the DC/DC circuit comprises a first power unit IG1, a second power unit IG2, a diode D1, a current sensor CS1, a filter inductor L1, a filter capacitor C1 and a normally-closed contactor Q1, wherein:
the collector of the first power unit IG1 is used as the positive input end of the DC/DC circuit and is connected with the negative end of the diode D1, the emitter of the first power unit IG1 is connected with the collector of the second power unit IG2, the midpoints of the first power unit IG1 and the second power unit IG2 are connected with the first end of the current sensor CS1, and the first power unit IG1 and the second power unit IG2 are IGBT power modules with the model of FF1400R12IP 4;
the current sensor CS1, the filter inductor L1 and the filter capacitor C1 are sequentially connected in series, the filter capacitor C1 is used as an output end of a DC/DC circuit, an emitter of the second power unit IG2 is connected with a first end of the normally-closed contactor Q1 and is used as a negative input end of the DC/DC circuit, a second end of the normally-closed contactor Q1 is respectively connected with a positive end of the diode D1 and the filter capacitor C1, the model of the normally-closed contactor Q1 is EVR400-B, and the capacitance of the filter capacitor C1 is 500uF;
as shown in fig. 3 and 4, when the superconducting magnet is charged and the first power unit IG1 is turned on, the first power unit IG1 and the second power unit IG2 are turned on by complementary waveforms, the process is a current rising process, the DC/DC circuit is adjusted to a Buck mode, the positive input end and the negative input end of the DC/DC circuit transmit electric energy to the input end of the filter capacitor C1, wherein the breakdown voltage of the diode D1 is greater than the maximum voltage of the collector of the first power unit IG1, so that current can only flow into the collector of the first power unit IG1, and the current passes through the collector and the base and is increased by the emitter, thereby resulting in current rising, the input impedance of the first power unit IG1 is large, the driving power is small, and the capability of driving a load is increased;
the current sensor CS1 is used for monitoring the current, and further current signals are fed back to the display panel in real time, the filter inductor L1 is used for adjusting the high-frequency current and reducing the jitter of the high-frequency voltage, and finally the filter capacitor C1 is used for storing energy and releasing the current to communicate with a load, so that the purpose of the filter capacitor is to reduce the alternating current ripple coefficient and improve the efficient smooth direct current output;
as shown in fig. 5, a loop is formed by a normally closed contactor Q1 and the negative end of the DC circuit to charge a load, after the superconducting magnet is fully charged, current flows back, the first power unit IG1 is closed, the second power unit IG2 is opened, the current flows through the second power unit IG2 to enable the current to reversely flow, and the current is fed back to the power grid, so that the loss of electric energy is reduced;
as shown in fig. 6 and 7, when the superconducting magnet is discharged and the first power unit IG1 is turned on, the current falling process is adopted in the process, the operation of the contactor Q1 is always closed when the superconducting magnet is discharged and is adjusted to be in an off state, the DC/DC circuit is in a Boost mode, and the current discharged by the load flows to the collector of the first power unit IG1 through the positive electrode end of the diode D1 and sequentially passes through the current sensor CS1, the filter inductor L1 and the filter capacitor C1 to form a freewheeling circuit;
as shown in fig. 8, the first power unit IG1 is turned off, the second power unit IG2 is turned on, the current flows through the second power unit IG2 to be conducted, the current in the follow current circuit is reflowed, and then the current is reduced, meanwhile, when the output voltage is detected to exceed the quench voltage, the process is the same as the discharging process, the DC/DC circuit is in a Boost mode, the current is reduced, and then the superconducting magnet is protected;
as shown in fig. 9, when the entire superconducting magnet system is powered down, current flows through the filter capacitor C1, the filter inductor L1, the current sensor CS1, the collector of the second power unit IG2, the emitter of the second power unit IG2 and the normally closed contactor Q1 in sequence to provide a freewheeling circuit, and the current slowly drops, so that the sudden power failure of the system is avoided, and damage to circuit components and the superconducting magnet is avoided.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (5)
1. The utility model provides a superconducting magnet power supply circuit, includes the AC/DC rectifier circuit that is used for alternating current to change direct current to and establish ties in the DC/DC circuit that is used for adjusting direct current of AC/DC rectifier circuit output, its characterized in that: the DC/DC circuit comprises a first power unit IG1, a second power unit IG2, a diode D1, a current sensor CS1, a filter inductor L1, a filter capacitor C1 and a normally-closed contactor Q1, wherein:
the collector of the first power unit IG1 is used as the positive input end of the DC/DC circuit and is connected with the negative end of the diode D1, the emitter of the first power unit IG1 is connected with the collector of the second power unit IG2, the midpoints of the first power unit IG1 and the second power unit IG2 are connected with the first end of the current sensor CS1, the filter inductor L1 and the filter capacitor C1 are sequentially connected in series, the filter capacitor C1 is used as the output end of the DC/DC circuit, the emitter of the second power unit IG2 is connected with the first end of the normally-closed contactor Q1 and is used as the negative input end of the DC/DC circuit, and the second end of the normally-closed contactor Q1 is respectively connected with the positive end of the diode D1 and the filter capacitor C1.
2. A superconducting magnet power supply circuit according to claim 1, wherein: the first power unit IG1 and the second power unit IG2 are IGBT power modules with model number FF1400R12IP 4.
3. A superconducting magnet power supply circuit according to claim 1, wherein: the breakdown voltage of the diode D1 is larger than the maximum voltage of the collector of the first power unit IG 1.
4. A superconducting magnet power supply circuit according to claim 1, wherein: the normally closed contactor Q1 is of the type EVR400-B.
5. A superconducting magnet power supply circuit according to claim 1, wherein: the capacitance of the filter capacitor C1 is 500uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811185315.2A CN109217669B (en) | 2018-10-11 | 2018-10-11 | Superconducting magnet power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811185315.2A CN109217669B (en) | 2018-10-11 | 2018-10-11 | Superconducting magnet power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109217669A CN109217669A (en) | 2019-01-15 |
| CN109217669B true CN109217669B (en) | 2024-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811185315.2A Active CN109217669B (en) | 2018-10-11 | 2018-10-11 | Superconducting magnet power supply circuit |
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| CN (1) | CN109217669B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579904A (en) * | 2020-05-18 | 2020-08-25 | 中国电力科学研究院有限公司 | Quench detection circuit and method for superconducting transformer winding |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0884479A (en) * | 1994-09-12 | 1996-03-26 | Hitachi Ltd | Safety unit for switching circuit |
| CN202503343U (en) * | 2012-03-23 | 2012-10-24 | 漳州耐欧立斯科技有限责任公司 | System power supply control apparatus of off-grid wind charging controller |
| US9837896B1 (en) * | 2016-06-07 | 2017-12-05 | Smk Corporation | DC-to-DC converter |
| CN107528311A (en) * | 2017-10-20 | 2017-12-29 | 陕西航空电气有限责任公司 | A kind of circuit for improving reliability in HVDC brushless motor controller power process |
| CN208904890U (en) * | 2018-10-11 | 2019-05-24 | 合肥科威尔电源系统有限公司 | A kind of superconducting magnet circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200830687A (en) * | 2007-01-15 | 2008-07-16 | zhen-yue Fan | Control apparatus of solar power system |
-
2018
- 2018-10-11 CN CN201811185315.2A patent/CN109217669B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0884479A (en) * | 1994-09-12 | 1996-03-26 | Hitachi Ltd | Safety unit for switching circuit |
| CN202503343U (en) * | 2012-03-23 | 2012-10-24 | 漳州耐欧立斯科技有限责任公司 | System power supply control apparatus of off-grid wind charging controller |
| US9837896B1 (en) * | 2016-06-07 | 2017-12-05 | Smk Corporation | DC-to-DC converter |
| CN107528311A (en) * | 2017-10-20 | 2017-12-29 | 陕西航空电气有限责任公司 | A kind of circuit for improving reliability in HVDC brushless motor controller power process |
| CN208904890U (en) * | 2018-10-11 | 2019-05-24 | 合肥科威尔电源系统有限公司 | A kind of superconducting magnet circuit |
Non-Patent Citations (1)
| Title |
|---|
| 超导磁体供电电源的控制;罗秀文等;《电工电能新技术》;19930331(第3期);第42-46页 * |
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| CN109217669A (en) | 2019-01-15 |
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Address after: 230088 Shanghai Pu Industrial Park, 4715 Wangjiangxi Road, Hefei High-tech Zone, Anhui Province Applicant after: Hefei Kewei Power System Co.,Ltd. Address before: 230088 Shanghai Pu Industrial Park, 4715 Wangjiangxi Road, Hefei High-tech Zone, Anhui Province Applicant before: HEFEI KEWELL POWER SYSTEM CO.,LTD. |
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Address after: 230088 Building 2, Hupu Industrial Park, No. 4715, Wangjiang West Road, hi tech Zone, Hefei City, Anhui Province Applicant after: Cowell Technology Co.,Ltd. Address before: 230088 Building 2, Hupu Industrial Park, No. 4715, Wangjiang West Road, hi tech Zone, Hefei City, Anhui Province Applicant before: Hefei Kewei Power System Co.,Ltd. |
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