CN107545977A - The lifting field device and superconducting magnet system of superconducting magnet - Google Patents
The lifting field device and superconducting magnet system of superconducting magnet Download PDFInfo
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- CN107545977A CN107545977A CN201710670669.5A CN201710670669A CN107545977A CN 107545977 A CN107545977 A CN 107545977A CN 201710670669 A CN201710670669 A CN 201710670669A CN 107545977 A CN107545977 A CN 107545977A
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Abstract
The application provides a kind of the lifting field device and superconducting magnet system of superconducting magnet, and the lifting field device of the superconducting magnet includes：Field power supply, including current input terminal and current output terminal, for providing electric current during the liter field process of superconducting magnet and drop field；Unload energy circuit, connected with the field power supply, at least one including interconnection unload can part and at least one switch element, at least one switch element be connected between the current input terminal and the current output terminal, described unload can be connected to the field power supply subassembly selection.The lifting field device of technical scheme superconducting magnet can be multiplexed during the liter field process of superconducting magnet and drop field, and suitable for the different superconducting magnet of drop field rate.
Description
Technical field
The application is related to superconducting magnet system field, more particularly to the lifting field device and superconducting magnet of a kind of superconducting magnet
System.
Background technology
MR imaging apparatus is one of important tool of current medical imaging technical field, can provide the people of hurtless measure
Body organization internal information.Magnet system is then the primary part of magnetic resonance equipment, is used to be magnetized into as objective body to provide
The main field of proton group.At present, typical magnet system mainly includes permanent magnet systems and superconducting magnet system, due to superconducting magnetic
It is higher that system system can produce magnetic field intensity, and the more preferable magnetic field of stability, therefore the application of superconducting magnet system is also got over
Come more extensive.
The content of the invention
In view of this, the application provides a kind of the lifting field device and superconducting magnet system of superconducting magnet.Specifically, this Shen
It please be achieved by the following technical solution：
On one side, the application provides a kind of lifting field device of superconducting magnet, the lifting field device of the superconducting magnet
Including：
Field power supply, including current input terminal and current output terminal, for the liter field process and drop field mistake in superconducting magnet
Electric current is provided in journey；
Unload can circuit, connect with the field power supply, including at least one of interconnection unloads energy part and at least one
Switch element, at least one switch element are connected between the current input terminal and the current output terminal, by described in
The field power supply can be connected to subassembly selection by unloading.
On the other hand, the application provides a kind of superconducting magnet system, and the superconducting magnet system includes：
The lifting field device of above-mentioned superconducting magnet；
Coil array；And
Superconducting switch, it is in parallel with the coil array, for the lifting field device of the superconducting magnet optionally to be connected
It is connected to the coil array.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of superconducting magnet system in correlation technique；
Fig. 2 is the circuit diagram of another superconducting magnet system in correlation technique；
Fig. 3 is the circuit diagram of one embodiment of the application superconducting magnet system；
Fig. 4 is the circuit diagram of one embodiment that the application unloads energy circuit；
Fig. 5 is the circuit diagram for another embodiment that the application unloads energy circuit；
Fig. 5 A are the circuit diagrams for the further embodiment that the application unloads energy circuit；
Fig. 5 B are the circuit diagrams for the further embodiment that the application unloads energy circuit；
Fig. 5 C are the circuit diagrams for the further embodiment that the application unloads energy circuit；
Fig. 5 D are the circuit diagrams for the further embodiment that the application unloads energy circuit；
Fig. 5 E are the circuit diagrams for the further embodiment that the application unloads energy circuit；
Fig. 5 F are the circuit diagrams for the further embodiment that the application unloads energy circuit；
Fig. 6 is the circuit diagram of another embodiment of the application superconducting magnet system；
Fig. 7 is the circuit diagram of the further embodiment of the application superconducting magnet system.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the application.
It is only merely for the purpose of description specific embodiment in term used in this application, and is not intended to be limiting the application.
" one kind " of singulative used in the application and appended claims, " described " and "the" are also intended to including majority
Form, unless context clearly shows that other implications.It is also understood that term "and/or" used herein refers to and wrapped
Containing the associated list items purpose of one or more, any or all may be combined.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the application
A little information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, do not departing from
In the case of the application scope, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determining ".
Fig. 1 is refer to, is the circuit diagram of superconducting magnet system 10 in correlation technique.As shown in figure 1, superconducting magnetic system
System 10 can include：Coil array 11, superconducting switch 12 and field power supply 13.Wherein it is possible to coil array 11 and superconduction are opened
The combination for closing 12 is considered as superconducting magnet 21.
Field power supply 13 includes current input terminal and current output terminal, for the liter field process in superconducting magnet 21 and drop field
During electric current is provided.
Coil array 11 can be composed in series by several single superconduction toroidal windings according to certain way.There is electricity
When stream passes through coil array 11, coil array 11 can produce magnetic field.
Superconducting switch 12 is in parallel with coil array 11, for field power supply 13 to be used to selectively connect into coil array 11.
When field power supply 13 is connected into coil array 11, field power supply 13 can apply electric current, coil array to coil array 11
11 can convert electrical energy into electromagnetic energy, now can produce magnetic field in the central imaging area of superconducting magnet 21.
Specifically, foreign current, due to heating effect of current, superconducting switch 12 can be applied to superconducting switch 12 first
Temperature can raise, so that superconducting switch 12 is changed into Resistance states (equivalent to switch from superconducting state (equivalent to the closed of switch)
Off-state).After the disconnection of superconducting switch 12, electric current can be applied to coil array 11 by field power supply 13, so that line
Enclose array 11 and produce magnetic field in central imaging area.When the size of current that field power supply 13 applies to coil array 11 is according to certain
When rule (such as linear rule or exponential law) is gradually increased to current value set in advance, magnetic field caused by coil array 11
Magnetic field intensity can reach expected magnetic field intensity.Now, keep the output current size of field power supply 13 constant, stopping pair
Superconducting switch 12 applies foreign current, makes the temperature of superconducting switch 12 reduce, so that superconducting switch 12 is changed into super from Resistance states
State is led, in parallel with coil array 11, the electric current exported to field power supply 13 shunts.After the closure of superconducting switch 12, adjustment
The output current size of field power supply 13 is gradually reduced to zero, then the size of current shunted by superconducting switch 12 can be gradual from zero
Increase.When the size of current shunted by superconducting switch 12 reaches current value set in advance, superconducting switch 12 and coil battle array
Row 11 can be of coupled connections to form closed-loop path, so that superconducting magnet 21 enters follow current pattern.Enter in superconducting magnet 21
After entering follow current pattern, field power supply 13 can disconnect with superconducting magnet 21.This process is superconducting magnet 21
Field process is risen, field power supply 13 can be considered as to the liter field device of superconducting magnet 21.
With the liter field process of above-mentioned superconducting magnet correspondingly, Fig. 2 is refer to, is superconducting magnet system 20 in correlation technique
Circuit diagram.Similar with the superconducting magnet system 10 shown in Fig. 1, the superconducting magnet system 20 shown in Fig. 2 also includes：Coil battle array
Row 11, superconducting switch 12 and field power supply 13.Wherein it is possible to the combination of coil array 11 and superconducting switch 12 is considered as superconducting magnetic
Body 21.But unlike superconducting magnet system 10, superconducting magnet system 20 also include unloading can circuit 24, for by coil array
The electromagnetic energy of 11 storages is discharged for Joule heat.
Specifically, can adjust first field power supply 13 output current size progressively increased to by zero it is set in advance
Current value, the then size of current shunted by superconducting switch 12 can be gradually reduced to zero.At this point it is possible to superconducting switch 12 is applied
Foreign current is so that its temperature raises, so that superconducting switch 12 is changed into Resistance states from superconducting state.After the disconnection of superconducting switch 12,
Disconnections that be of coupled connections of superconducting switch 12 and coil array 11, field power supply 13, unload can circuit 24 and the formation of coil array 11 close
Close loop.The output current size of adjustment field power supply 13 is gradually reduced to zero by current value set in advance, can be with controlling stream
The size of current for crossing coil array 11 is gradually reduced.In the process, the electromagnetism that energy circuit 24 can store coil array 11 is unloaded
Joule heat can be converted into gradually to be discharged.The electromagnetic energy that coil array 11 stores is completely converted into joule when unloading energy circuit 24
After heat is discharged, the also vanishing therewith of the magnetic field intensity in magnetic field caused by coil array 11.It is strong in the magnetic field of superconducting magnet 21
Spend vanishing after, field power supply 13 and unload energy circuit 24 can be disconnected with superconducting magnet 21.This process is superconducting magnetic
The drop field process of body 21, can by field power supply 13 and unload can circuit 24 be considered as the drop field device of superconducting magnet 21.
In general, in correlation technique, the liter field process and drop field process of superconducting magnet are otherwise varied, the main body of the difference
It is Joule heat to be needed now during drop field using energy circuit is unloaded by electromagnetic energy, and energy electricity need not be then unloaded during Sheng Chang
Road, thus also cause the liter field device of superconducting magnet different from drop field device, i.e., the lifting field device of superconducting magnet is in its liter field
The problem of can not being multiplexed during process and drop field., can be using the internal resistance of field power supply 13 as unloading energy in order to solve the problem
The resistance of circuit 24, i.e., using the internal resistance of field power supply 13, or utilize and connect field power supply 13 and the cable of superconducting magnet 21
Line resistance, the electromagnetic energy that coil array 11 is stored be Joule heat discharged, due to the internal resistance value of field power supply
Or the line resistance value of cable is generally smaller, therefore it is time-consuming longer to drop field process, adopts in such a way, exacerbate power supply or
The heat dissipation problem of person's cable, the work risk of power supply and cable is improved, shorten the service life of power supply or cable, cost
It is too high, it is not easy to practical application.
The application provides a kind of the lifting field device and superconducting magnet system of superconducting magnet, so that the lifting field of superconducting magnet
Device can be multiplexed during it rises field process and drop field, and be easy to practical application.Fig. 3 is refer to, is the application superconducting magnetic
The circuit diagram of one embodiment of system system 30.It is similar with the superconducting magnet system 20 shown in Fig. 2, the superconduction shown in Fig. 3
Magnet system 30 can also include：Superconducting magnet 21, field power supply 13 and unload can circuit 34.Wherein, field power supply 13 is with unloading energy
Circuit 34 is composed in series the lifting field device of superconducting magnet, and is connected with superconducting magnet 21.
But unlike the superconducting magnet system 20 shown in Fig. 2, in the superconducting magnet system 30 shown in Fig. 3, unload energy
Circuit 34 can unload including one can part 301 and a switch element 302.Diode can be included by unloading energy part 301
Or resistance unit, it can include in each diode wrapping at least one diode, or each resistance unit
Include at least one resistance (the energy part 301 that unloads shown in figure includes the opposite a pair of diodes unit of conducting direction).Switch is single
Member 302 can include at least one switch (switch element 302 shown in figure includes a switch).
It is in parallel with switch element 302 to unload energy part 301.One end of switch element 302 is connected to the electric current of field power supply 13
Output end (i.e. the positive pole of field power supply 13), the other end are then connected to the current input terminal of field power supply 13 by superconducting magnet 21
(i.e. the negative pole of field power supply 13).
When switch element 302 closes, switch element 302 can will unload energy part 301 and bypass, that is, it is equivalent to unload energy circuit 34
Circuit is accessed in wire, can now carry out a liter field to superconducting magnet 21.And when switch element 302 disconnects, unloading can part 301
Circuit is then accessed, the electromagnetic energy that superconducting magnet 21 is stored is that Joule heat is discharged, now can be to superconducting magnet 21
Carry out drop field.
After superconducting magnet 21 is completed to rise field, by field power supply 13 and unload can circuit 34 be composed in series the lifting of superconducting magnet
It field device, can disconnect with superconducting magnet 21, be carried out again with superconducting magnet 21 when superconducting magnet 21 needs to carry out drop field
Connection.And after superconducting magnet 21 completes drop field, the lifting field device of above-mentioned superconducting magnet can also disconnect with superconducting magnet 21
Connection, it is attached again with superconducting magnet 21 when superconducting magnet 21 needs to carry out liter field again.
As seen from the above-described embodiment, the switch list by being connected between the current input terminal and the current output terminal
Member, and it is in parallel with switch element unload can part, can both carry out a liter field to superconducting magnet, superconducting magnet can be carried out again
Field is dropped, i.e. the lifting field device of superconducting magnet can be multiplexed during it rises field process and drop field.
In actual applications, (i.e. the magnetic field intensity in magnetic field caused by superconducting magnet reduces the drop field rate of superconducting magnet
Speed) with unload can circuit provide dissipation resistance tight association.When the dissipation resistance for unloading energy circuit offer is smaller, superconducting magnet
Drop field rate it is slower, take it is longer.And when the dissipation resistance for unloading energy circuit offer is larger, the drop field rate of superconducting magnet is then
Comparatively fast, superconducting magnet may be caused to quench.For the different superconducting magnet of specification, model, it can reduce and take again
It is avoided that the drop field rate scope quenched generally also differs.And for same superconducting magnet, in different actual conditions
The drop field rate of lower needs may and differ, or even in the different time sections during dropping field, its drop field rate needed
May also it differ.
In order to improve the flexibility of the lifting field device of superconducting magnet, the energy circuit therein that unloads is set to provide multiple differences
Dissipation resistance, suitable for the different superconducting magnet of drop field rate, refer to Fig. 4, for the application unload can circuit 44 a reality
Apply the circuit diagram of example.The energy circuit 44 that unloads shown in Fig. 4 can apply in the superconducting magnet system 30 shown in Fig. 3, substitute
Energy circuit 34 is unloaded, the lifting field device of superconducting magnet is composed in series with field power supply 13.
As shown in figure 4, unloading energy circuit 44 includes three resistance units (resistance unit shown in figure includes a resistance),
Respectively：Resistance unit 401, resistance unit 402 and resistance unit 403, and seven switch element (switch lists shown in figure
Member includes a switch), be respectively：Switch element 411, switch element 412, switch element 413, switch element 414, switch are single
Member 415, switch element 416 and switch element 417.
The current output terminal that one end of switch element 411 is connected to field power supply 13 (unloads the electric current inflow of energy circuit 44
End), the current input terminal that the other end is then connected to field power supply 13 by superconducting magnet 21 (unloads the electric current outflow of energy circuit 44
End)；Or one end of switch element 411 be connected to field power supply 13 current input terminal (unload can circuit 44 electric current outflow
End), the current output terminal that the other end is then connected to field power supply 13 by superconducting magnet 21 (unloads the electric current inflow of energy circuit 44
End).Resistance unit 401 and resistance unit 402 are connected by switch element 412, and resistance unit 402 and resistance unit 403 pass through
Switch element 413 is connected.One end of resistance unit 401 is connected directly to the current output terminal of field power supply 13, and the other end then leads to
Cross the current input terminal that switch element 414 is connected to field power supply 13.One end of resistance unit 402 is connected by switch element 415
The current output terminal of field power supply 13 is connected to, the electric current that the other end is then connected to field power supply 13 by switch element 416 inputs
End.One end of resistance unit 403 is connected to the current output terminal of field power supply 13 by switch element 417, and the other end is then direct
It is connected to the current input terminal of field power supply 13.
When switch element 411 closes, and other switch elements disconnect, unload energy circuit 44 and be equivalent to wire access circuit,
Can now a liter field be carried out to superconducting magnet.
When switch element 414 closes, and other switch elements disconnect, resistance unit 401 accesses circuit.Work as switch element
415th, 416 closure, when other switch elements disconnect, resistance unit 402 accesses circuit.When switch element 417 closes, other are opened
When pass unit disconnects, resistance unit 403 accesses circuit.It can be made by controlling closure or the disconnection of different switch elements
Any one resistance unit accesses circuit, and the electromagnetic energy of superconducting magnet storage is discharged for Joule heat, now can be with
Drop field is carried out to superconducting magnet.
When switch element 414,417 closes, when other switch elements disconnect, resistance unit 401 and resistance unit 403 are simultaneously
Couple into circuit.When the closure of switch element 414,415,416, when other switch elements disconnect, resistance unit 401 and resistance list
The access circuit in parallel of member 402.When the closure of switch element 415,416,417, when other switch elements disconnect, resistance unit 402
Access circuit in parallel with resistance unit 403.By controlling closure or the disconnection of different switch elements any two can be made electric
Unit access circuit in parallel is hindered, the electromagnetic energy of superconducting magnet storage is discharged for Joule heat, now can be to superconduction
Magnet carries out drop field.The resistance value that two resistance unit parallel connections can make to unload the energy offer of circuit 44 diminishes, suitable for dropping field rate
Less superconducting magnet.Simultaneously as parallel circuit shunting principle, can be less than by the electric current of each resistance unit and pass through superconduction
The electric current of magnet, i.e., Joule heat caused by each resistance unit can be reduced, and reduced the component loss of resistance unit, extended
The service life of resistance unit.
When switch element 412,416 closes, when other switch elements disconnect, resistance unit 401 is gone here and there with resistance unit 402
Couple into circuit.When the closure of switch element 413,415, when other switch elements disconnect, resistance unit 402 and resistance unit
403 series connection access circuits.When switch element 413,414,416 closes, and other switch elements disconnect, resistance unit 401 and electricity
Hinder the series connection access circuit of unit 403.When switch element 412,413 closes, and other switch elements disconnect, three resistance unit strings
Couple into circuit.Any two resistance unit or three electricity can be made by controlling closure or the disconnection of different switch elements
The electromagnetic energy that resistance unit series connection access circuit stores superconducting magnet is discharged for Joule heat, now can be to superconducting magnetic
Body carries out drop field.The series connection of multiple resistance units can make to unload can the resistance value that provides of circuit 44 become big, suitable for drop field rate compared with
Big superconducting magnet.
Shown in Fig. 4 unload can circuit 44 can be extended according to certain rule, specifically, unload can circuit 44 can wrap
Include some resistance units being connected in series by least one switch element.Each resistance unit is connected by least one switch element
The current input terminal and current output terminal of field power supply are connected to, i.e., the current input terminal of field power supply is connected directly to for one end
Or for the resistance unit of current output terminal, it is only necessary to its other end is connected into field power supply by least one switch element
The other end, and for other resistance units, then need to be connected to the electricity of field power supply by least one switch element
Input is flowed, and the current output terminal of field power supply is connected to by least one switch element.In addition, at least one switch
Unit is connected between the current input terminal of field power supply and the current output terminal.
In actual applications, it is the power resistor of 2-10 milliohms as resistance unit that can select resistance value, can be with
Resistance unit is cooled by the way of air-cooled or liquid cold (such as water/ethylene glycol mixture or liquid nitrogen), further to prolong
The service life of long resistance unit.Furthermore it is possible to switch element is formed from electromagnetic contactor, so as to pass through computer control
System processed realizes that to the closure of electromagnetic contactor or the control of disconnection the control for improving the lifting field device to superconducting magnet is imitated
Rate.
Fig. 5 is refer to, the circuit diagram of another embodiment of energy circuit 54 is unloaded for the application.Energy is unloaded shown in Fig. 5
Circuit 54 can also be applied in the superconducting magnet system 30 shown in Fig. 3, and replacement unloads energy circuit 34, group of being connected with field power supply 13
Into the lifting field device of superconducting magnet.
As shown in figure 5, unloading energy circuit 54, including four diodes, (diode shown in figure includes one two
Pole pipe), be respectively：Diode 501, diode 502, diode 503 and diode 504, Yi Jijiu
Individual switch element (switch element shown in figure includes a switch), it is respectively：Switch element 511, switch element 512, open
It is single to close unit 513, switch element 514, switch element 515, switch element 516, switch element 517, switch element 518 and switch
Member 519.Wherein, conducting direction opposite diode 501 and diode 502, and two diodes of connection
Switch element 512 and switch element 513 form diode group 1, and the diode 503 and diode that conducting direction is opposite
Unit 504, and the switch element 514 of two diodes of connection and switch element 515 then form diode group 2.
The current output terminal that one end of switch element 511 is connected to field power supply 13 (unloads the electric current inflow of energy circuit 54
End), the current input terminal that the other end is then connected to field power supply 13 by superconducting magnet 21 (unloads the electric current outflow of energy circuit 54
End)；Or one end of switch element 511 be connected to field power supply 13 current input terminal (unload can circuit 54 electric current outflow
End), the current output terminal that the other end is then connected to field power supply 13 by superconducting magnet 21 (unloads the electric current inflow of energy circuit 54
End).It is connected in series between diode group 1 and diode group 2 by switch element 516 and switch element 517, specifically, two
It is connected in series between pole pipe unit 501 and diode 503 by switch element 516, diode 502 and diode list
It is connected in series between member 504 by switch element 517.The electric current that one end of diode group 1 is connected directly to field power supply 13 is defeated
Go out end, the other end is then connected to the current input terminal of field power supply 13 by switch element 518.One end of diode group 2 passes through
Switch element 519 is connected to the current output terminal of field power supply 13, and the electric current that the other end is then connected directly to field power supply 13 is defeated
Enter end.
When switch element 511 closes, and other switch elements disconnect, as shown in Figure 5A, unload can circuit 54 be equivalent to and lead
Line accesses circuit, now can carry out a liter field to superconducting magnet.
When switch element 512,513,518 closes, when other switch elements disconnect, as shown in Figure 5 B, diode group 1 connects
Enter circuit.
When switch element 514,515,519 closes, when other switch elements disconnect, as shown in Figure 5 C, diode group 2 connects
Enter circuit.
When the closure of switch element 512,513,514,515,518,519, when other switch elements disconnect, such as Fig. 5 D institutes
Show, positive diode 501, diode 503 and reverse diode 502, the difference of diode 504 are simultaneously
Couple into circuit.
It is as shown in fig. 5e, positive when other switch elements disconnect when the closure of switch element 512,515,516,517
Diode 501, diode 503 are connected, and reverse diode 502, diode 504 are connected, and two poles
Pipe unit 501, diode 503 and diode 502, diode 504 access circuit in parallel.
When switch element 511,515,516,517 closes, when other switch elements disconnect, as illustrated in figure 5f, four just
To diode series connection access circuit.
When there is diode to access circuit, the electromagnetic energy that diode can store superconducting magnet is Jiao
Have burning ears and discharged, can now carry out drop field to superconducting magnet.
Shown in Fig. 5 unload can circuit 54 can also be extended according to certain rule, specifically, unload can circuit 54 can be with
Including some diode groups being connected in series, the diode group further comprises being connected to the pair of diode
Between two switch elements, be connected with two switch elements between diode group described in each two.Can electricity with unloading shown in Fig. 4
Road 44 is similar, each diode group by least one switch element be connected to the field power supply current input terminal and electric current it is defeated
Go out end, i.e., for the current input terminal of field power supply or the diode group of current output terminal are connected directly to for one end, it is only necessary to
Its other end to be connected to the other end of field power supply by least one switch element, and for other diode groups and
Speech, then need to be connected to the current input terminal of field power supply by least one switch element, and pass through at least one switch
Unit is connected to the current output terminal of field power supply.In addition, at least one switch element is connected to the electric current input of field power supply
Between end and the current output terminal.
In general, by controlling closure or the disconnection of different switch elements, quantity difference, conducting direction can be made not
The diode access circuit same, connected mode is different, so that multiple different equivalent resistances can be provided by unloading energy circuit
Value, suitable for the different superconducting magnet of drop field rate.In addition, under parallel, due to parallel circuit shunting principle, respectively
Joule heat caused by diode can be reduced, and reduced the component loss of diode, extended diode
Service life.
In actual applications, circulating current can be selected not less than 1.5 times of diode of the operating current of superconducting magnet
Diode is formed, can also be by the way of (such as water/ethylene glycol mixture or liquid nitrogen) cold using air-cooled or liquid to diode
Unit is cooled, further to extend the service life of diode.Switched furthermore it is possible to be formed from electromagnetic contactor
Unit, so as to be realized by computer control system to the closure of electromagnetic contactor or the control of disconnection, improve to superconduction
The control efficiency of the lifting field device of magnet.
Fig. 6 and Fig. 7 are refer to, respectively another of the application superconducting magnet system 60 and superconducting magnet system 70 is implemented
The circuit diagram of example.As shown in fig. 6, unloading energy circuit 64 and unloading the access circuit in parallel of energy circuit 65, and gone here and there with field power supply 13
The lifting field device of connection composition superconducting magnet.As shown in fig. 7, unload energy circuit 74 and unload the energy series connection access circuit of circuit 75, and with
Field power supply 13 is composed in series the lifting field device of superconducting magnet.
In general, can be set in the lifting field device of superconducting magnet it is multiple unload can circuit, respectively unloading can be between circuit
It can in parallel or series connect, so can further improve the flexibility of the lifting field device of superconducting magnet, make therein
Multiple different resistance values or equivalent resistance (dissipate resistance) can be provided by unloading energy circuit, different suitable for drop field rate
Superconducting magnet or needs carry out segmentation drop field and use the superconducting magnet of different drop field rates.
Or will can also unload can circuit be integrated into one unload can module, wired in parallel or can be composed in series by multiple unload
Energy circuit is always unloaded, can so realize the modularization extension for unloading energy circuit, the configuration for reducing the lifting field device of superconducting magnet is answered
Miscellaneous degree, is easy to practical application.
The energy circuit 64,65,74,75 that unloads shown in Fig. 6 and Fig. 7 can be respectively including unloading energy circuit similar to shown in Fig. 3
34.In another embodiment, unloading energy circuit 64,65,74,75 can also include unloading energy circuit similar to shown in Fig. 4 respectively
44, or can circuit 54 similar to unloading shown in Fig. 5.
The lifting field device of the application superconducting magnet goes for the superconducting magnet in MR imaging apparatus.In superconduction
When magnet needs to carry out liter field, above-mentioned lifting field device is attached with superconducting magnet, and current source is provided for superconducting magnet,
Superconducting magnet is completed after rising field, and MR imaging apparatus enters working condition, and now above-mentioned lifting field device breaks with superconducting magnet
Open connection.When superconducting magnet needs to carry out drop field, above-mentioned lifting field device is attached with superconducting magnet, and superconducting magnet is stored up
The electromagnetic energy deposited is that Joule heat is discharged, and after superconducting magnet completes drop field, MR imaging apparatus is stopped shape
State, now above-mentioned lifting field device disconnected with superconducting magnet.
Certainly, the lifting field device of the application superconducting magnet is readily applicable to the superconducting magnet in other equipment, this Shen
It please be not particularly limited.
Device embodiment described above is only schematical, wherein the unit illustrated as separating component can
To be or may not be physically separate, it can be as the part that unit is shown or may not be physics list
Member, you can with positioned at a place, or can also be distributed on multiple NEs.It can be selected according to the actual needs
In some or all of part realize the purpose of application scheme.
The preferred embodiment of the application is the foregoing is only, not limiting the application, all essences in the application
God any modification, equivalent substitution and improvements done etc., should be included within the scope of the application protection with principle.
Claims (11)
1. the lifting field device of a kind of superconducting magnet, it is characterised in that the lifting field device of the superconducting magnet includes：
Field power supply, including current input terminal and current output terminal, for during the liter field process of superconducting magnet and drop field
Electric current is provided；
Energy circuit is unloaded, is connected with the field power supply, including at least one unload of interconnection can part and at least one switch
Unit, at least one switch element are connected between the current input terminal and the current output terminal, and energy is unloaded by described
It is connected to the field power supply subassembly selection.
2. the lifting field device of superconducting magnet according to claim 1, it is characterised in that the switch element unloads with described
Energy Components Parallel Connection connection, and it is series at the field power supply.
3. the lifting field device of superconducting magnet according to claim 1, it is characterised in that the energy part that unloads includes two poles
Pipe unit, the diode include at least one diode.
4. the lifting field device of superconducting magnet according to claim 3, it is characterised in that the circulating current of the diode
Not less than 1.5 times of the operating current of superconducting magnet.
5. the lifting field device of superconducting magnet according to claim 3, it is characterised in that the energy circuit that unloads is included at least
One diode group, the diode group include the opposite a pair of diodes unit of conducting direction.
6. the lifting field device of superconducting magnet according to claim 5, it is characterised in that the energy circuit that unloads is including some
The diode group being connected in series, the diode group further comprise two be connected between the pair of diode
Individual switch element, two switch elements is connected between diode group described in each two, each diode group is opened by least one
Close current input terminal and current output terminal that unit is connected to the field power supply.
7. the lifting field device of superconducting magnet according to claim 1, it is characterised in that the energy part that unloads includes resistance
Unit, the resistance unit include at least one resistance.
8. the lifting field device of superconducting magnet according to claim 7, it is characterised in that the energy circuit that unloads is including some
The resistance unit being connected in series, a switch element is connected between resistance unit described in each two, each resistance unit leads to
Cross current input terminal and current output terminal that at least one switch element is connected to the field power supply.
9. the lifting field device of superconducting magnet according to claim 1, it is characterised in that the switch element is included at least
One switch, the switch include electromagnetic contactor.
10. the lifting field device of superconducting magnet according to claim 1, it is characterised in that the superconducting magnet system bag
Including multiple described unload can circuit.
11. a kind of superconducting magnet system, it is characterised in that the superconducting magnet system includes：
The lifting field device of any described superconducting magnet of claim 1 to 10；
Coil array；And
Superconducting switch, it is in parallel with the coil array, for the lifting field device of the superconducting magnet to be used to selectively connect to
The coil array.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922722A (en) * | 2018-06-27 | 2018-11-30 | 中国原子能科学研究院 | Superconducting cyclotron superconducting magnet exciting method |
| CN113161100A (en) * | 2020-01-22 | 2021-07-23 | 西门子(深圳)磁共振有限公司 | Main magnetic field generating unit, lifting field unit, superconducting magnet and lifting field method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201975195U (en) * | 2010-12-29 | 2011-09-14 | 中国科学院高能物理研究所 | Exergonic device for superconducting iron remover magnet |
| CN103777161A (en) * | 2012-10-17 | 2014-05-07 | 上海联影医疗科技有限公司 | Field reducing circuit and method of superconducting magnet |
| CN105655223A (en) * | 2015-12-28 | 2016-06-08 | 上海集成电路研发中心有限公司 | Magnetic field generating device of plasma etching system |
| CN105980874A (en) * | 2013-12-16 | 2016-09-28 | 通用电气公司 | System and method for energizing a superconducting magnet of an MRI system |
| CN106558869A (en) * | 2016-12-20 | 2017-04-05 | 上海联影医疗科技有限公司 | A kind of quenching protection circuit and quench guard method for superconducting magnet system |
-
2017
- 2017-08-08 CN CN201710670669.5A patent/CN107545977B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201975195U (en) * | 2010-12-29 | 2011-09-14 | 中国科学院高能物理研究所 | Exergonic device for superconducting iron remover magnet |
| CN103777161A (en) * | 2012-10-17 | 2014-05-07 | 上海联影医疗科技有限公司 | Field reducing circuit and method of superconducting magnet |
| CN105980874A (en) * | 2013-12-16 | 2016-09-28 | 通用电气公司 | System and method for energizing a superconducting magnet of an MRI system |
| CN105655223A (en) * | 2015-12-28 | 2016-06-08 | 上海集成电路研发中心有限公司 | Magnetic field generating device of plasma etching system |
| CN106558869A (en) * | 2016-12-20 | 2017-04-05 | 上海联影医疗科技有限公司 | A kind of quenching protection circuit and quench guard method for superconducting magnet system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922722A (en) * | 2018-06-27 | 2018-11-30 | 中国原子能科学研究院 | Superconducting cyclotron superconducting magnet exciting method |
| CN113161100A (en) * | 2020-01-22 | 2021-07-23 | 西门子(深圳)磁共振有限公司 | Main magnetic field generating unit, lifting field unit, superconducting magnet and lifting field method |
| CN113161100B (en) * | 2020-01-22 | 2022-10-18 | 西门子(深圳)磁共振有限公司 | Main magnetic field generating unit, lifting field unit, superconducting magnet and lifting field method |
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| CN107545977B (en) | 2020-04-14 |
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