CN211209588U - Superconducting magnet switching power supply with energy feedback - Google Patents
Superconducting magnet switching power supply with energy feedback Download PDFInfo
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- CN211209588U CN211209588U CN201920304610.9U CN201920304610U CN211209588U CN 211209588 U CN211209588 U CN 211209588U CN 201920304610 U CN201920304610 U CN 201920304610U CN 211209588 U CN211209588 U CN 211209588U
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Abstract
The utility model discloses a superconducting magnet switching power supply of energy repayment, including high pressure side bus capacitance Cbus, the inverter bridge unit for charging, high frequency transformer T1 for charging, switch tube Q1, Q2, Qinv, filter inductance L f, filter capacitance Cf and superconducting magnet coil L coil constitute the charging circuit of magnet, L coil, L f, Cf, Q1, Q2, Qinv, first diode D17, low pressure side bus capacitance Cbus1, the inverter bridge unit for discharging, high frequency transformer T2 for discharging, rectifier unit for discharging and high pressure side bus capacitance Cbus constitute the discharging circuit of magnet, a superconducting magnet switching power supply of energy repayment adopts the topological structure of charge-discharge separation, realizes the two-way flow of energy between superconducting magnet energy storage and the electric wire netting, adopts high frequency transformer to keep apart, has saved the front end power frequency transformer, adopts soft switch control to use less superconducting magnet coil side of low pressure heavy current, has reduced the loss of switch tube.
Description
Technical Field
The utility model relates to a superconducting magnet field, in particular to superconducting magnet switching power supply of electrified energy repayment.
Background
The superconducting magnet is widely applied to the fields of medical treatment, electric power, industry, scientific research and the like due to the characteristics of extremely low electric loss, high magnetic field, high stability and the like, a superconducting coil needs a DC/DC power supply device capable of realizing the exchange of magnet energy and power grid energy, an early superconducting magnet power supply adopts a silicon controlled rectifier rectifying circuit based on power frequency transformer isolation, and like the power supply structure of the thesis 'double anti-star type rectifying circuit parallel operation circulation analysis', because the circuit of the structure has low-frequency ripples, the volume of a filter device is large, and the structure is only used in a high-power superconducting magnet device;
the existing DC/DC superconducting magnet power supply device generally adopts an energy bidirectional flow topology structure composed of a bridge circuit, a filter capacitor and a DC chopper circuit on the low-voltage side, for example, US004695932 "a superconducting energy storage circuit" and chinese patent CN102222983 "a superconducting energy storage magnet input and output integrated converter", and this type of circuit has the following disadvantages: (1) if a power frequency transformer is adopted for isolation, the whole machine is large in size; if a high-frequency transformer is adopted for isolation, a bridge circuit and a direct-current chopper circuit on the low-voltage side need more switching tubes, the voltage drop of the low-voltage side is large, and the efficiency of the whole machine is low; (2) the soft switch flexible control is difficult to realize, and therefore, a superconducting magnet switch power supply with energy feedback is provided.
SUMMERY OF THE UTILITY MODEL
High efficiency and miniaturization are important development trends of electric energy conversion devices. The utility model relates to a superconducting power supply DC/DC device based on high frequency transformer keeps apart, its low pressure side pipe is small in quantity, the pressure drop is little, support soft on-off control to current DC/DC superconducting power supply device not enough.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a superconducting magnet switch power supply with energy feedback comprises a magnet energy storage and chopping unit, an inverter bridge unit for charging, an inverter bridge unit for discharging and a rectification unit for discharging;
the magnet energy storage and chopping unit consists of a high-frequency transformer for charging, a first switch tube, a second switch tube, a first diode, a superconducting magnet coil, a filter capacitor, a filter inductor, a switch tube and a second diode, wherein an output port at the upper end and an output port at the lower end of the high-frequency transformer for charging are respectively connected with the anode of the first switch tube anti-parallel diode and the anode of the second switch tube anti-parallel diode, one end of the filter capacitor and one end of the superconducting magnet coil are both connected with an output port in the middle of the high-frequency transformer for charging, the cathodes of the first switch tube and the second switch tube are both connected with the cathode of the second diode and the anode of the first diode in anti-parallel connection with the switch tube, the anode of the second diode in anti-parallel connection with the switch tube is connected with the cathode of a low-voltage side direct current bus capacitor and one end of the filter inductor, and the other end, the cathode of the first diode is connected with the anode of the low-voltage first direct-current bus capacitor;
the positive electrode of the direct current side of the charging inverter bridge unit is connected with the positive electrode of the high-voltage side direct current bus capacitor, the negative electrode of the direct current side of the charging inverter bridge unit is connected with the negative electrode of the high-voltage side direct current bus capacitor, and the output end of the alternating current side of the charging inverter bridge unit is connected with the primary side of the charging high-frequency transformer;
the direct-current side positive input end of the inversion bridge unit for discharging is connected with the positive electrode of the low-voltage first direct-current bus capacitor, the direct-current side negative input end of the inversion bridge unit for discharging is connected with the negative electrode of the low-voltage first direct-current bus capacitor, and the alternating-current output end of the inversion bridge unit for discharging is connected with the primary side of the high-frequency transformer for discharging;
the high-voltage side of the high-frequency transformer for discharging is connected with the alternating current side of the rectifying unit for discharging, the direct-current side positive electrode of the rectifying unit for discharging is connected with the positive electrode of the high-voltage side direct-current bus capacitor, and the direct-current side negative electrode of the rectifying unit for discharging is connected with the negative electrode of the high-voltage side direct-current bus capacitor.
Preferably, the bridge circuits in the charging inverter bridge unit and the discharging inverter bridge unit are all fully-controlled devices, and the control of the bridge circuits is controlled by soft switches.
Preferably, when the switching power supply is used as a charging power supply to input energy to the superconducting magnet coil, the switching tube is always kept in a conducting state, the charging inverter bridge unit converts direct current of the high-voltage side direct current bus capacitor into high-frequency alternating current, the high-frequency alternating current is rectified by the charging high-frequency transformer and is converted into constant-voltage direct current after being filtered by the first switching tube, the second switching tube, the filter inductor and the filter capacitor to charge the magnet, and the charging speed of the superconducting magnet is controlled by controlling the on-off duty ratio of the full-control device in the charging inverter bridge unit.
Preferably, when the switching power supply realizes that the stored energy of the superconducting magnet coil is fed back to the power grid, the first switching tube and the second switching tube are always conducted, when the switching tubes are turned off, the current of the superconducting magnet coil flows through the first switching tube, the second switching tube and the first diode, then a constant-voltage direct current output is obtained through filtering of a low-voltage first direct current bus capacitor, and then the constant-voltage direct current output is transmitted to the high-voltage direct current bus capacitor through the discharge inverter bridge unit, the discharge high-frequency transformer and the discharge rectifier unit, when the switching tubes are turned on, the current of the superconducting magnet coil flows through the first switching tube, the second switching tube and the switching tubes, and the discharge speed of the superconducting magnet is controlled by controlling the on-off duty.
Preferably, the switch tube in the magnet energy storage and chopping unit is a fully-controlled device.
Compared with the prior art, the utility model discloses following beneficial effect has:
the power supply adopts a topological structure with separated charging and discharging, so that the bidirectional flow of energy between the superconducting magnet energy storage and the power grid is realized; the high-frequency transformer is adopted for isolation, so that a bulky front-end power frequency transformer is omitted; the soft switch control is adopted, and fewer rectifier tubes are used on the low-voltage and high-current magnet load side, so that the loss of the switch tubes is greatly reduced.
Drawings
Fig. 1 is a block diagram of a superconducting magnet switching power supply topology with energy feedback according to the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of a superconducting magnet switching power supply with energy feedback according to the present invention;
FIG. 3 is a schematic diagram of a prior art US patent US 004695932;
fig. 4 is a schematic diagram of chinese patent CN102222983 in the prior art.
In the figure, the device comprises a magnet energy storage and chopping unit 1, a charging inverter bridge unit 2, a discharging inverter bridge unit 3, a discharging rectifying unit 4, a charging high-frequency transformer T1, a discharging high-frequency transformer T2, a Q1, a first switching tube, a Q2, a second switching tube, a D17, a first diode, L coil, a superconducting magnet coil, Cf, a filter capacitor, L f, a filter inductor, Qinv, a switching tube, Dinv, a second diode, Cbus1, a low-voltage first direct-current bus capacitor and a Cbus, a high-voltage second direct-current bus capacitor.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1, a superconducting magnet switching power supply with energy feedback includes a magnet energy storage and chopper unit 1, an inverter bridge unit for charging 2, an inverter bridge unit for discharging 3, and a rectifier unit for discharging 4;
the magnet energy storage and chopper unit 1 comprises a high-frequency transformer T1 for charging, a first switch tube Q1, a second switch tube Q2, a first diode D17, a superconducting magnet coil L coil, a filter capacitor Cf, a filter inductor L f, a switch tube Qinv and a second diode Dinv, an output port at the upper end and an output port at the lower end of the high-frequency transformer T1 for charging are respectively connected with the positive electrode of a first switch tube Q1 anti-parallel diode and the positive electrode of a second switch tube Q2 anti-parallel diode, one end of the filter capacitor Cf and one end of the superconducting magnet coil L coil are both connected with a middle output port of the high-frequency transformer T1 for charging, the negative electrodes of the first switch tube Q1 and the second switch tube Q2 are both connected with the negative electrode of the second diode Dinv in anti-parallel connection with the switch tube Qinv and the positive electrode of the first diode D17, the positive electrode of the switch tube Qinv in anti-parallel connection with the second diode Dinv and the negative electrode of the first switch tube 1 and the negative electrode of the superconducting magnet coil 358 are connected with the filter capacitor Cbus 17, and the negative electrode of the filter capacitor Cbus 3642;
the positive electrode of the direct current side of the charging inverter bridge unit 2 is connected with the positive electrode of the high-voltage second direct current bus capacitor Cbus, the negative electrode of the direct current side of the charging inverter bridge unit 2 is connected with the negative electrode of the high-voltage second direct current bus capacitor Cbus, and the output end of the alternating current side of the charging inverter bridge unit 2 is connected with the primary side of a charging high-frequency transformer T1;
the direct-current side positive electrode input end of the discharging inverter bridge unit 3 is connected with the positive electrode of the low-voltage first direct-current bus capacitor Cbus1, the direct-current side negative electrode input end of the discharging inverter bridge unit 3 is connected with the negative electrode of the low-voltage first direct-current bus capacitor Cbus1, and the alternating-current output end of the discharging inverter bridge unit 3 is connected with the primary side of a discharging high-frequency transformer T2;
the high-frequency transformer T2 for discharge is connected on the high-voltage side to the ac side of the rectifier unit 4 for discharge, the dc-side positive electrode of the rectifier unit 4 for discharge is connected to the positive electrode of the second high-voltage dc bus capacitor Cbus, and the dc-side negative electrode of the rectifier unit 4 for discharge is connected to the negative electrode of the second high-voltage dc bus capacitor Cbus.
Referring to fig. 1, the bridge circuits in the charging inverter bridge unit 2 and the discharging inverter bridge unit 3 are all fully controlled devices, and the control is controlled by soft switching.
Referring to fig. 1, when the switching power supply inputs energy to the superconducting magnet coil L coil as a charging power supply, the switching tube Qinv is kept in a conducting state all the time, the charging inverter bridge unit 2 converts the direct current of the high-voltage second direct current bus capacitor Cbus into a high-frequency alternating current, and the high-frequency charging transformer T1, the first switching tube Q1, the second switching tube Q2, the filter inductor L f and the filter capacitor Cf perform rectification and filtering, and then the high-frequency charging transformer and the filter capacitor Cbus are changed into a constant-voltage direct current to charge the magnet, and the charging speed of the superconducting magnet is controlled by controlling the on-off duty ratio of the full-control device in the.
Referring to fig. 1, when the switching power supply realizes the energy storage of the superconducting magnet coil L coil to be fed back to the grid, the first switching tube Q1 and the second switching tube Q2 are always turned on, when the switching tube Qinv is turned off, the current of the superconducting magnet coil L coil flows through the first switching tube Q1, the second switching tube Q2 and the first diode D17, then the current is filtered by the low-voltage first dc bus capacitor Cbus1 to obtain a constant-voltage dc output, and then the constant-voltage dc output is transmitted to the high-voltage second dc bus capacitor Cbus through the inverter bridge unit for discharging 3, the high-frequency transformer for discharging T2 and the rectifier unit for discharging 4, when the switching tube Qinv is turned on, the current of the superconducting magnet coil L coil flows through the first switching tube Q1, the second switching tube Q2 and the switching tube Qinv, and the discharging speed of the superconducting magnet is controlled by controlling the on-off duty ratio of the switching tube Qinv.
Referring to fig. 1, the switching tube Qinv in the magnet energy storage and chopper unit 1 is a fully-controlled device.
When the power supply works in a charging mode and energy is input to the magnet L coil, the discharging inverter bridge unit 3 and the discharging rectifier unit 4 stop working, the switch tube Qinv keeps a conducting state all the time, the charging inverter bridge unit 2 converts direct current of a high-voltage side direct current bus Cbus into high-frequency alternating current, the high-frequency alternating current is rectified by a transformer T1 and switch tubes Q1 and Q2 and is converted into constant-voltage direct current after being filtered by L f and Cf, the magnet is charged, the charging speed of the superconducting magnet is controlled by controlling the on-off duty ratio of the switch tube in the charging inverter bridge unit 2, and the charging inverter bridge unit 2 adopts soft switch control.
When the power supply works in a discharging mode, when the stored energy of the magnet L coil is fed back to a power grid, the charging loop inverter bridge 2 stops working, the switch tubes Q1 and Q2 are always conducted for continuous current, a chopper circuit is formed by the magnet L coil, the switch tube Qinv and the low-voltage side bus capacitor Cbus1, the current of the magnet L coil is converted into the voltage of the low-voltage side bus capacitor Cbus1, the discharging speed of the magnet L coil current can be controlled by controlling the on-off duty ratio of the switch tube Qinv, the direct current of the low-voltage side direct current bus Cbus1 is converted into high-frequency alternating current by the discharging inverter bridge unit 3, the direct current is integrated into the direct current through the transformer T2 and the discharging rectifier unit 4 to charge the high-voltage side direct current bus, the discharging speed of the low-voltage side capacitor is controlled by controlling the on-off duty ratio of a full-control device of the discharging inverter bridge unit 3.
Examples
Referring to fig. 2, Q1 to Q4 adopt IGBTs, Q1 to Q4, D1 to D4 and C1 to C4 form the charging inverter bridge unit 2, D1 to D4 are diodes connected in anti-parallel with Q1 to Q4, C1 to C4 are parasitic capacitors or external capacitors of Q1 to Q4, and Cb is an isolation capacitor; the Q5-Q8 adopt MOSFET, Q5-Q8, D5-D8 and the parallel capacitor form the inverter bridge unit 3 for discharging; and the Qs1 and the Qs2 adopt synchronous rectifier tubes, and Ds1 and Ds2 are anti-parallel diodes of the synchronous rectifier tubes respectively. The MOSFET is selected as Qinv, and the diode is connected in parallel in an anti-reverse mode by Dinv; the discharge rectifying unit 4 employs an H-bridge type uncontrolled rectifying circuit. The specific working principle and process are analyzed according to two working modes of charging and discharging respectively as follows:
(1) during charging, Q5-Q8 are turned off, and Qinv is turned on. The charging circuit adopts a control mode of phase-shifted full bridge and synchronous rectification, the bridge arms of Q2 and Q4 are the leading arms, the bridge arms of Q1 and Q3 are the lagging arms, and the whole process is divided into 12 working states.
The high-voltage sides Q1 and Q4 are switched on, Q2 and Q3 are switched off, a primary side current loop is Cbus-Q1-Cb-T1-Q4-Cbus, the low-voltage side Qs1 is switched on, Qs2 is switched off, and a low-voltage side current loop of the transformer is T1-Qs 1-Qinv-L f-L coil-T1 in an initial state.
t0-t1Time: t is t0The Q4 is turned off at the moment, and the Q4 can be turned off at approximately zero voltage due to the clamping effect of the capacitor C4. The phases C4 and C2 resonate with the leakage inductance of the transformer T1, C4 charges, and C2 discharges. The charging loop of the C4 is Cbus-Q1-Cb-T1-C4-Cbus, and the discharging loop of the C2 is C2-Q1-Cb-T1-C2. When the discharge of C2 is complete, the Q2 body diode D2 turns on naturally.
t1-t2Time: after D2 is conducted, the primary side current freewheeling path is D2-Q1-Cb-T1-D2. Turn on Q2, Q2 is zero voltage on.
t2-t3Time: t is t2At that time, Q1 is turned off, Qs2 is turned on, and Q1 is turned off at approximately zero voltage. The phases C3 and C1 resonate with the leakage inductance of the transformer T1, C1 charges, and C3 discharges. The charging loop of C1 is C1-Cb-T1-Q2(D2) -C1, and the discharging loop of C3 is C3-Cb-T1-Q2(D2) -Cbus-C3. When the discharge of C3 is complete, the Q3 body diode D3 turns on naturally. The branch current of the Qs2 is gradually increased after the Qs2 is switched on, and the branch current of the Qs1 is gradually reduced.
t3-t4Time: after D3 is turned on, Q3 is turned on, and Q3 is turned on for zero voltage. The current path is Cbus-D3-Cb-T1 leakage inductance-D2-Cbus, and the transformer is arranged at the momentThe primary voltage is reversely added to the leakage inductance of the transformer, and the primary current is rapidly reduced to 0.
t4-t5Time: the primary current starts to increase reversely after being reduced to 0, and the current loop is Cbus-Q2-T1-Cb-Q3-Cbus. Low side current iQs1Continue to decrease iQs2The increase continues.
t5-t6Time: i.e. iQs1When smaller, Qs1 turns off, Qs1 turns off with approximately zero current, Qs2 alone flows, and reverse energy output begins. The operation principle of the second half period is the same as that of the first half period, and is not described here.
According to the working principle, the inverter bridge unit and the synchronous rectification unit for charging are controlled by soft switches during magnet charging, and the switching loss is low. The low-voltage side voltage loop only has two tube voltage drops of Qs1 (or Qs2) and Qinv, and the efficiency is high.
(2) During discharging, Q1-Q4 are turned off, and Qs1 and Qs2 are turned on. The discharge loop consists of two parts: the chopper circuit comprises a magnet coil, Qinv, Cbus1 and D17; the other is a DC/DC isolation power supply consisting of Cbus1, Q5-Q8, D5-D8, a capacitor connected in parallel with the other, a transformer T2, D13-D16 and Cbus.
The magnet current freewheeling loop is L coil-T1-Qs1(Qs2) -Qinv-L f-L coil when Qinv is on, the magnet coil charges the Cbus1 capacitor when Qinv is off, and the current loop is L coil-T1-Qs1(Qs2) -D17-Cbus 1-L f-L coil.
The DC/DC isolation power supply delivers energy at Cbus1 to Cbus, controlling Cbus1 voltage to be constant within a certain range. When the turn ratio of the high-voltage side to the low-voltage side of the transformer T2 is N, the DC/DC isolated power supply can only work normally when the voltage on the capacitor Cbus1 multiplied by N is greater than the voltage on Cbus. And an inverter circuit consisting of the capacitors Q5-Q8, D5-D8 and the capacitors connected in parallel with the inverter circuit is controlled by soft switches. The control method is the same as the phase shift control of the charging circuit.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A superconducting magnet switch power supply with energy feedback is characterized by comprising a magnet energy storage and chopping unit (1), a charging inverter bridge unit (2), a discharging inverter bridge unit (3) and a discharging rectifying unit (4);
the magnet energy storage and chopper unit (1) consists of a charging high-frequency transformer (T1), a first switch tube (Q1), a second switch tube (Q2), a first diode (D17), a superconducting magnet coil (L coil), a filter capacitor (Cf), a filter inductor (L f), a switch tube (Qinv) and a second diode (Dinv), wherein an output port at the upper end and an output port at the lower end of the charging high-frequency transformer (T1) are respectively connected with an anode of a first switch tube (Q1) antiparallel diode and an anode of a second switch tube (Q2) antiparallel diode, one end of the filter capacitor (Cf) and one end of the superconducting magnet coil (L coil) are respectively connected with an output port in the middle of the charging high-frequency transformer (T1), cathodes of the first switch tube (Q1) and the second switch tube (Q2) are respectively connected with a cathode of the second diode (Dinv) antiparallel diode and an anode of the first switch tube (D17), cathodes of the first switch tube (Cf) and a cathode of the superconducting magnet coil (Cnv) are connected with a cathode of the first diode (Qinv) and a cathode of the superconducting magnet coil (17) and a cathode of the first switch tube (Qinv) and a cathode of the superconducting magnet coil (17) of the superconducting magnet coil (Qinv) connected with an anode of the first diode (17) antiparallel diode (Qinv) and a cathode of the superconducting magnet coil (17) and a cathode of the first diode (D17) and a cathode of the first switch tube;
the positive electrode of the direct current side of the charging inverter bridge unit (2) is connected with the positive electrode of the high-voltage second direct current bus capacitor (Cbus), the negative electrode of the direct current side of the charging inverter bridge unit (2) is connected with the negative electrode of the high-voltage second direct current bus capacitor (Cbus), and the output end of the alternating current side of the charging inverter bridge unit (2) is connected with the primary side of a charging high-frequency transformer (T1);
the direct-current side positive electrode input end of the discharging inverter bridge unit (3) is connected with the positive electrode of a low-voltage first direct-current bus capacitor (Cbus1), the direct-current side negative electrode input end of the discharging inverter bridge unit (3) is connected with the negative electrode of the low-voltage first direct-current bus capacitor (Cbus1), and the alternating-current output end of the discharging inverter bridge unit (3) is connected with the primary side of a discharging high-frequency transformer (T2);
the high-voltage side of the high-frequency transformer (T2) for discharge is connected with the AC side of the rectification unit (4) for discharge, the DC side positive electrode of the rectification unit (4) for discharge is connected with the positive electrode of the high-voltage second DC bus capacitor (Cbus), and the DC side negative electrode of the rectification unit (4) for discharge is connected with the negative electrode of the high-voltage second DC bus capacitor (Cbus).
2. A superconducting magnet switching power supply with energy feedback according to claim 1, wherein: bridge circuits in the charging inverter bridge unit (2) and the discharging inverter bridge unit (3) are all full-control devices, and the control of the full-control devices is controlled by soft switches.
3. A superconducting magnet switching power supply with energy feedback according to claim 1, characterized in that when the switching power supply is used as a charging power supply to input energy to a superconducting magnet coil (L coil), the switching tube (Qinv) is kept in a conducting state all the time, the charging inverter bridge unit (2) converts the direct current of the high-voltage second direct current bus capacitor (Cbus) into high-frequency alternating current, the high-frequency alternating current is rectified by a charging high-frequency transformer (T1), the first switching tube (Q1), the second switching tube (Q2), a filter inductor (L f) and a filter capacitor (Cf) and then is converted into constant-voltage direct current to charge the magnet, and the charging speed of the superconducting magnet is controlled by controlling the on-off duty ratio of a full-control device in the charging inverter bridge unit (2).
4. A superconducting magnet switching power supply with energy feedback as claimed in claim 1, wherein when the switching power supply realizes the energy storage feedback of the superconducting magnet coil (L coil) to the power grid, the first switching tube (Q1) and the second switching tube (Q2) are always conducted, when the switching tube (Qinv) is turned off, the current of the superconducting magnet coil (L coil) flows through the first switching tube (Q1), the second switching tube (Q2) and the first diode (D17), then the current is filtered by the low-voltage first direct-current bus capacitor (Cbus1) to obtain a constant-voltage direct-current output, and then the constant-voltage direct-current output is transmitted to the high-voltage second direct-current bus capacitor (Cbus) through the discharging inverter bridge unit (3), the discharging high-frequency transformer (T2) and the discharging rectifier unit (4), when the switching tube (Qinv) is turned on, the current of the superconducting magnet coil (L coil flows through the first switching tube (Q1), the second switching tube (Q2) and the switching tube (Qinv), and the on-off duty ratio of the superconducting magnet is controlled by the switch (Qinv) to control the on-off speed.
5. A superconducting magnet switching power supply with energy feedback according to claim 1, wherein: and a switching tube (Qinv) in the magnet energy storage and chopping unit (1) is a fully-controlled device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818506A (en) * | 2019-03-08 | 2019-05-28 | 中国科学院合肥物质科学研究院 | A kind of superconducting magnet Switching Power Supply with energy feedback and ultrahigh in efficiency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818506A (en) * | 2019-03-08 | 2019-05-28 | 中国科学院合肥物质科学研究院 | A kind of superconducting magnet Switching Power Supply with energy feedback and ultrahigh in efficiency |
| CN109818506B (en) * | 2019-03-08 | 2024-01-05 | 中国科学院合肥物质科学研究院 | Superconducting magnet switching power supply with energy feedback |
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