CN104734511A - Coreless transformer, isolation type non-magnetic switching power supply and magnetic resonance imaging system - Google Patents
Coreless transformer, isolation type non-magnetic switching power supply and magnetic resonance imaging system Download PDFInfo
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- CN104734511A CN104734511A CN201310713389.XA CN201310713389A CN104734511A CN 104734511 A CN104734511 A CN 104734511A CN 201310713389 A CN201310713389 A CN 201310713389A CN 104734511 A CN104734511 A CN 104734511A
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
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- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention relates to a coreless transformer, an isolation type non-magnetic switching power supply and a magnetic resonance imaging system. The isolation type non-magnetic switching power supply comprises a first power unit and a second power unit, wherein the second power unit is electrically coupled with the first power unit through any one of the coreless transformer, a piezoelectric type transformer and at least two capacitance isolators. The isolation type non-magnetic switching power supply is arranged in a scanning room of the magnetic resonance imaging system to be used for providing power for at least one of a radio-frequency amplifier, a gradient amplifier and a gate driver of the magnetic resonance imaging system. The isolation type non-magnetic switching power supply generates near-zero electromagnetic interference in work. Due to the fact that the isolation type non-magnetic switching power supply can be arranged in the scanning room of the magnetic resonance imaging system, a plurality of power supply cables arranged between an equipment room and the scanning room in the prior art are omitted, installation of the magnetic resonance imaging system becomes easy, and the cost of the magnetic resonance imaging system is reduced.
Description
Technical field
The present invention relates to magnetic resonance imaging system, to be particularly a kind ofly applied in magnetic resonance imaging system and isolated without magnetic switch power supply with magnetic resonance imaging system compatibility, and the isolated air-core transformer without using in magnetic switch power supply.
Background technology
Magnetic resonance imaging system mainly comprises the parts such as main magnet, gradient amplifier, gradient coil assembly, radio frequency amplifier, radio frequency coil assemblies.This main magnet for generation of main field, this gradient amplifier for encourage gradient coil assembly selected axially by Actions of Gradient Magnetic Field to main field.Radio frequency amplifier is used for excitation radio frequency coil assembly to patient or imaging object emitting radio frequency signal.Usually, gradient amplifier, gradient coil assembly, radio frequency amplifier, radio frequency coil assemblies are arranged in the scanning room (scan room) of magnetic resonance imaging system, for provide the first power subsystem of AC energy to gradient amplifier and for provide the second source unit of direct current energy to be arranged at magnetic resonance imaging system to radio frequency amplifier canyon (equipment room) in.In order to realize the power supply to gradient amplifier and radio frequency amplifier, need to use the radio frequency amplifier in the second source unit of gradient amplifier in the first power subsystem of more cable connection device indoor and scanning room and connection device indoor and scanning room, above-mentioned more cable can cause the installation of magnetic resonance imaging system comparatively complicated, and adds the cost of magnetic resonance imaging system.
The power subsystem of powering to parts such as above-mentioned gradient amplifier and radio frequency amplifiers adopts device for converting electric energy to realize the conversion of electric energy usually, but the ferromagnetic substance used in above-mentioned device for converting electric energy is not suitable for working in the strong magnetic field circumstance of magnetic resonance imaging system, because in the strong magnetic field circumstance of magnetic resonance imaging system, above-mentioned ferromagnetic substance will there will be magnetic saturation, and then lose magnetism, therefore have impact on the normal work of above-mentioned device for converting electric energy.
Therefore, be necessary to provide a kind of newly isolated without magnetic switch power supply, this new isolated strong magnetic field circumstance without magnetic switch power supply and magnetic resonance imaging system is compatible.
Summary of the invention
Present conclusion one or more aspect of the present invention is so that basic comprehension of the present invention, and wherein this conclusion is not extensive overview of the present invention, and also not intended to be identifies some key element of the present invention, and also also not intended to be marks its scope.On the contrary, the main purpose of this conclusion presented concepts more of the present invention with reduced form before hereafter presenting more detailed description.
One aspect of the present invention is to provide a kind of isolated without magnetic switch power supply, and this is isolated comprises without magnetic switch power supply:
First power cell;
Second power cell; This second power cell is by any one in air-core transformer, piezoelectric transformer and at least two condenser type isolators and the first power cell electrical couplings;
This is isolated is arranged in the scanning room of magnetic resonance imaging system without magnetic switch power supply, powers at least one in the radio frequency amplifier, gradient amplifier and the gate drivers that comprise to magnetic resonance imaging system; Wherein, this is isolated without producing the electromagnetic interference being roughly zero during magnetic switch power work.
Another aspect of the present invention is to provide a kind of magnetic resonance imaging system, and this magnetic resonance imaging system comprises:
Main magnet, for generation of main field;
Gradient coil assembly;
Gradient amplifier, for encourage gradient coil assembly produce in selected gradient axes gradient magnetic with by described Actions of Gradient Magnetic Field to main field;
Radio frequency coil assemblies;
Radio frequency amplifier, produces radiofrequency signal for excitation radio frequency coil assembly; And
Isolated without magnetic switch power supply, in the scanning room being arranged at magnetic resonance imaging system and for providing electric energy at least one in gradient amplifier and radio frequency amplifier; This is isolated comprises without magnetic switch power supply:
First power cell;
Second power cell; This second power cell is by any one in air-core transformer, piezoelectric transformer and at least two condenser type isolators and the first power cell electrical couplings; This is isolated without producing the electromagnetic interference being roughly zero during magnetic switch power work.
Another aspect of the present invention is to provide a kind of air-core transformer, and this air-core transformer comprises:
Armature winding;
Secondary winding, for armature winding magnetic couplings;
First electric capacity; And
Second electric capacity;
Wherein, the primary magnetic leakage inductance of this first electric capacity and air-core transformer is jointly with the primary series resonance frequency resonance expected or with the primary parallel resonance frequency resonance expected; The secondary magnetic leakage inductance of this second electric capacity and air-core transformer is jointly with the secondary tandem resonance frequency resonance expected or with the secondary parallel resonance frequency resonance expected;
This first electric capacity and armature winding are all integrated in the first flexible PCB or printed circuit board (PCB), and this second electric capacity and secondary winding are all integrated in the second flexible PCB or printed circuit board (PCB).
Another aspect of the present invention is to provide a kind of condenser type isolator, and this condenser type isolator comprises:
Dielectric layer;
Resonant inductance;
Primary metals plate, by this resonant inductance and the first power cell electrical couplings;
Secondary metal plate, with the second power cell electrical couplings;
Wherein, this resonant inductance and primary metals plate all embed the first flexible PCB or printed circuit board (PCB); This secondary metal plate embeds the second flexible PCB or printed circuit board (PCB); This dielectric layer is arranged between the first flexible PCB or printed circuit board (PCB) and the second flexible PCB or printed circuit board (PCB), and this condenser type isolator utilizes electric field that electric energy is passed to secondary metal plate from primary metals plate.
Provided by the invention isolated without magnetic switch power supply, magnetic resonance imaging system and air-core transformer, isolatedly can be arranged in the scanning room of magnetic resonance imaging system without magnetic switch power supply due to above-mentioned, therefore the more service cable in prior art between canyon and scanning room is saved, make the installation of magnetic resonance imaging system comparatively simple, reduce the cost of magnetic resonance imaging system simultaneously.In addition, due to above-mentioned isolated be the Switching Power Supply of non-magnetic without magnetic switch power supply, also namely do not comprise ferromagnetic substance, therefore avoid the problem using the device for converting electric energy of ferromagnetic substance cannot work because ferromagnetic substance occurs magnetic saturation.
Accompanying drawing explanation
Be described for embodiments of the present invention in conjunction with the drawings, the present invention may be better understood, in the accompanying drawings:
Fig. 1 is a kind of module diagram of magnetic resonance imaging system of execution mode, and this magnetic resonance imaging system is provided with isolated without magnetic switch power supply.
Fig. 2 is a kind of isolated schematic diagram of powering to the gradient amplifier in magnetic resonance imaging system without magnetic switch power supply of execution mode.
Fig. 3 is a kind of isolated schematic diagram of powering to the radio frequency amplifier in magnetic resonance imaging system without magnetic switch power supply of execution mode.
Fig. 4 is a kind of isolated schematic diagram of powering to the gate drivers in magnetic resonance imaging system without magnetic switch power supply of execution mode.
Fig. 5 is a kind of isolated functional block diagram without magnetic switch power supply of execution mode.
Fig. 6 is a kind of isolated circuit diagram without magnetic switch power supply of execution mode, and this is isolated is provided with air-core transformer without magnetic switch power supply.
Fig. 7 is the isolated circuit diagram without magnetic switch power supply of another kind of execution mode, and this is isolated is provided with air-core transformer without magnetic switch power supply.
Fig. 8 is integrated in the partial side view in cross section of the first printed circuit board (PCB) and the second printed circuit board (PCB) for air-core transformer shown in Fig. 6 or Fig. 7.
Fig. 9 is integrated in the partial side view in cross section of the first flexible PCB and the second flexible PCB for air-core transformer shown in Fig. 6 or Fig. 7.
Figure 10 is the partial side view in cross section of the embedding of air-core transformer shown in Fig. 6 or Fig. 7 multi-layer flexible circuit board.
Figure 11 is the partial side view in cross section of the embedding of air-core transformer shown in Fig. 6 or Fig. 7 multilayer board.
Figure 12 is the schematic diagram of the air-core transformer of another kind of execution mode.
Figure 13 is a kind of cross sectional view of compound coil of execution mode.
Figure 14 is the isolated circuit diagram without magnetic switch power supply of another kind of execution mode, and this is isolated is provided with two condenser type isolators without magnetic switch power supply.
Figure 15 is the isolated circuit diagram without magnetic switch power supply of another kind of execution mode, and this is isolated is provided with two condenser type isolators without magnetic switch power supply.
Figure 16 is integrated in the partial side view in cross section of the first printed circuit board (PCB) and the second printed circuit board (PCB) for the isolator of condenser type shown in Figure 14 or Figure 15.
Figure 17 is integrated in the partial side view in cross section of the first flexible PCB and the second flexible PCB for the isolator of condenser type shown in Figure 14 or Figure 15.
Figure 18 is the isolated circuit diagram without magnetic switch power supply of another kind of execution mode, and this is isolated is provided with piezoelectric transformer without magnetic switch power supply.
Figure 19 is the isolated circuit diagram without magnetic switch power supply of another kind of execution mode, and this is isolated is provided with piezoelectric transformer without magnetic switch power supply.
Figure 20 is the isolated circuit diagram without magnetic switch power supply of another kind of execution mode, and this is isolated is provided with piezoelectric transformer without magnetic switch power supply.
Embodiment
Below will describe the specific embodiment of the present invention, and it is pointed out that in the specific descriptions process of these execution modes, in order to carry out brief and concise description, this specification can not all do detailed description to all features of the execution mode of reality.Should be understandable that; in the actual implementation process of any one execution mode; as in the process of any one engineering project or design object; in order to realize the objectives of developer; in order to meet that system is correlated with or that business is relevant restriction; usually can make various concrete decision-making, and this also can change to another kind of execution mode from a kind of execution mode.In addition, it will also be appreciated that, although effort done in this development process may be complicated and tediously long, but for those of ordinary skill in the art relevant to content disclosed by the invention, some designs that the basis of the technology contents of disclosure exposure is carried out, manufacture or production etc. changes just conventional technological means, not should be understood to content of the present disclosure insufficient.
Unless otherwise defined, the technical term used in claims and specification or scientific terminology should be in the technical field of the invention the ordinary meaning that the personage with general technical ability understands." first ", " second " that use in patent application specification of the present invention and claims and similar word do not represent any order, quantity or importance, and are only used to distinguish different parts.The similar word such as " one " or " one " does not represent restricted number, but represents to there is at least one." comprise " or the similar word such as " comprising " mean to appear at " comprising " or " comprising " before element or object contain the element or object and equivalent element thereof that appear at " comprising " or " comprising " presented hereinafter, do not get rid of other elements or object." connection " or " being connected " etc. similar word be not defined in physics or the connection of machinery, no matter but can comprise electric connection, be direct or indirectly.
For understanding the present invention better, will first the overall structure of magnetic resonance imaging system be described in detail below.
Refer to diagram, Figure 1 shows that the module diagram of a kind of execution mode of magnetic resonance (magnetic resonance, MR) system.The operation of magnetic resonance imaging system 10 can control from operator's console 12, and operator's console 12 comprises keyboard or other input equipment 13, control panel 14 and display 16.Control desk 12 is communicated with computer system 20 by link 18, and provides interface to be used for regulation magnetic resonance imaging for operator, and display gained image, to the process of image carries out image, and by data and picture archiving.Input equipment 13 can comprise mouse, joystick, keyboard, trace ball, touch-screen, optical wand, voice control device or any similar or equivalent input equipment, and can be used for interactive geometric specification.
Computer system 20 comprises multiple module, and these modules are by such as communicating with one another by the electricity that utilizes backboard 20a to provide and/or data cube computation.Data cube computation can be direct wire link or wireless communication link etc.The module of computer system 20 comprises image processor block 22, CPU module 24 and memory module 26.Memory module 26 can comprise the frame buffer for storing image data array.In the execution mode replaced, image processor block 22 can be substituted by the image processing function that CPU module 24 is run.Computer system 20 can be linked to archives media device, permanent or backup of memory memory device or network.Computer system 20 also communicates with independently System control computer 32 by link 34.
In one embodiment, System control computer 32 comprises the one group of module intercomed via electricity and/or data cube computation 32a phase.Data cube computation 32a can be wire link or wireless communication link etc.In interchangeable execution mode, computer system 20 can realize with the module of System control computer 32 in identical computer system or multiple computer system.The module of System control computer 32 is comprised CPU module 36 and is connected to the pulse generator module 38 of operator's console 12 by communication link 40.
In one embodiment, pulse generator module 38 can be integrated in scanner device (as resonance assembly 52).The instruction that System control computer 32 is received from operator by link 40 will perform the order of scanning sequence.Pulse generator module 38 is by sending the system unit describing and the instruction of the timing of the sequential of the radio-frequency pulse of generation and pulse train, intensity and shape and data acquisition window and length, order and/or request are operated the pulse train that releasings (that is, execution) is expected.Pulse generator module 38 is connected to gradient amplifier system 42, and produces and be called the data of gradient waveform, and these gradient waveforms control the sequential of gradient pulse that uses in scan period and shape.
In one embodiment, pulse generator module 38 also can receive patient data from physiological acquisition controller 44, physiological acquisition controller 44 from the multiple different sensors Received signal strength being connected to patient, such as, from the ECG signal of electrode being attached to patient.Impulse generator module 38 is connected to scan room interface circuit 46, and scan room interface circuit 46 receives the signal be associated with the situation of patient and magnet system from various transducer.Patient positioning system 48 also receives the order carrying out scanning in position patient table being moved on to expectation by scan room interface circuit 46.
In one embodiment, the gradient waveform that impulse generator module 38 produces is applied gradient amplifier system 42.Gradient amplifier system 42 comprises X-axis gradient amplifier, Y-axis gradient amplifier and Z axis gradient amplifier.Physics gradient coil corresponding in each gradient amplifier excitation gradient coil assembly (generally marking 50), and produce magnetic field gradient pulse, carry out space encoding for gathered signal.Gradient coil assembly 50 forms a part for resonance assembly 52, and resonance assembly 52 comprises the polarization superconducting magnet with superconduction main coil 54.Resonance assembly 52 can comprise whole body radio frequency coil 56, surface or parallel imaging coil 76 or both.The coil 56,76 of radio frequency coil assemblies can be configured for transmitting and receiving or only transmit or receive only.Patient or imaging object 70 can be placed in the cylinder type patient imaging volume 72 of resonance assembly 52.Transceiver module 58 in System control computer 32 produces pulse, and these pulses are amplified by radio frequency amplifier 60, and is coupled to radio-frequency coil 56,76 by transmit/receive switch 62.The gained signal sent by the excited nucleus in patient can be sensed by identical radio-frequency coil 56, and is coupled to preamplifier 64 by transmit/receive switch 62.Or the signal sent by excited nucleus can be sensed by the separate receive coil of such as parallel coil or surface coils 76.In the receiver part of transceiver 58, demodulation, filtering and digitlization are carried out to the magnetic resonance signal amplified.Transmit/receive switch 62 is controlled by the signal from impulse generator module 38, radio frequency amplifier 60 is electrically connected to radio-frequency coil 56 during emission mode, and during receiving mode, preamplifier 64 is connected to radio-frequency coil 56.Transmit/receive switch 62 also can make it possible in transmitting or receiving mode, use individual radio frequency coil (such as, parallel or surface coils 76).
The magnetic resonance signal sensed by radio-frequency coil 56 or parallel or surface coils 76 by transceiver module 58 digitlization, and sends the memory module 66 in System control computer 32 to.Usually, the Frame corresponding to magnetic resonance signal is stored in memory module 66 temporarily, until convert to create image to them subsequently.Array processor 68 utilizes known transform method (modal have Fourier transform) to come to create image from magnetic resonance signal.These images send computer system 20 to by link 34, and in computer system 20, it stores in memory.In response to the order received from operator's console 12, this view data can be archived in long-term storage device, or by image processor 22, further process be done to it, pass to operator's console 12 and present on the display 16.
In one embodiment, be isolatedly positioned in the scanning room (scan room) of magnetic resonance imaging system 10 without magnetic switch power supply 90, power to give one or more parts in the scanning room of magnetic resonance imaging system 10.Such as, isolated without magnetic switch power supply 90 can be used in gradient amplifier 42 and radio frequency amplifier 60 any one power supply.The isolated concrete structure without magnetic switch power supply 90 will describe in subsequent figure 5-20.In one embodiment, isolatedly produce the electromagnetic interference being roughly zero when working without magnetic switch power supply 90, concrete reason will be set forth in subsequent figure 5-20.
Due to isolated without magnetic switch power supply 90 can be some or all of be arranged in the scanning room of magnetic resonance imaging system 10, therefore the installation of magnetic resonance imaging system 10 becomes easy.Further, be arranged in the canyon (equipment room) of magnetic resonance imaging system 10 by isolated without magnetic switch power supply 90 relative in prior art, the present invention is arranged in the scanning room of magnetic resonance imaging system 10 by isolated without magnetic switch power supply 90, can cable and filter etc. be saved, the cost of magnetic resonance imaging system 10 is minimized.
Refer to Fig. 2, magnetic resonance imaging system 10 comprises power distribution equipment (also can be described as power distribution cabinet, PDU) 40 further.Power distribution equipment 40 is arranged in the canyon 153 of magnetic resonance imaging system 10, and this canyon 153 is positioned at the outside of the scanning room 151 of magnetic resonance imaging system 10.In present embodiment, to be isolatedly all arranged in the scanning room 151 of magnetic resonance imaging system 10 without magnetic switch power supply 90, gradient amplifier 42 and gradient coil assembly 50.Isolated without magnetic switch power supply 90 and power distribution equipment 40 electrical couplings, isolated without magnetic switch power supply 90 for receiving input electric energy from power distribution equipment 40, and provide output electric energy to gradient amplifier 42.Respond the isolated above-mentioned output electric energy provided without magnetic switch power supply 90, gradient amplifier 42 works on power and encourages gradient coil assembly 50 to produce gradient magnetic in selected gradient axes.Such as, gradient coil assembly 50 can produce the gradient magnetic of the gradient magnetic of X axis, the gradient magnetic of Y-axis and Z-axis direction, the gradient magnetic of the gradient magnetic of above-mentioned X axis, the gradient magnetic of Y-axis and Z-axis direction is applied in main field, to facilitate the imaging of magnetic resonance imaging system 10.In a kind of concrete execution mode, the isolated direct current energy 902 provided for receiving power distribution equipment 40 without magnetic switch power supply 90, and output AC electric energy 904 to gradient amplifier 42.
Refer to Fig. 3, to be isolatedly all arranged in the scanning room 151 of magnetic resonance imaging system 10 without magnetic switch power supply 90, radio frequency amplifier 60 and radio frequency coil assemblies 158.Isolated without magnetic switch power supply 90 for providing electric energy to radio frequency amplifier 60, make radio frequency amplifier 60 work on power and excitation radio frequency coil assembly 158 produce radiofrequency signal.In a kind of concrete execution mode, the isolated AC energy 912 provided for receiving equipment room 153 without magnetic switch power supply 90, and DC power output 914 to radio frequency amplifier 60.In other embodiments, isolatedly can be used for without magnetic switch power supply 90 direct current energy 912 that receiving equipment room 153 provides, and DC power output 914 to radio frequency amplifier 60.
Refer to Fig. 4, magnetic resonance imaging system 10 comprises gate drivers 35 further, is isolatedly arranged in the scanning room 151 of magnetic resonance imaging system 10 without magnetic switch power supply 90, gate drivers 35 and switching device Q1.Isolated without magnetic switch power supply 90 for providing electric energy to gate drivers 35, gate drivers 35 is worked on power and produces driving voltage with the Q1 conducting of driving switch device or shutoff.In the infinite execution mode of one, switching device Q1 can be insulated gate bipolar transistor (insulatedgate bipolar transistor, IGBT).In a kind of concrete execution mode, the isolated AC energy 922 provided for receiving equipment room 153 without magnetic switch power supply 90, and DC power output 924 to gate drivers 35.
Fig. 5 is a kind of isolated functional block diagram without magnetic switch power supply 90 of execution mode.Isolatedly comprise the first power cell 91, isolating transformer 98 and the second power cell 99, first power cell 91 by isolating transformer 98 and the second power cell 99 electrical couplings without magnetic switch power supply 90.Isolating transformer 98 is for converting the elementary electric energy from the first power cell 91 to secondary electric energy, and this secondary electric energy is provided to the second power cell 99.Therefore, this second power cell 99 provides direct current energy or AC energy to load 900, and load 900 is worked on power.In one embodiment, isolating transformer 98 be air-core transformer 94A/94B shown in subsequent figure 6-20, any one in condenser type isolator 80 and piezoelectric transformer 70.
Load 900 is at least one in gate drivers 35 shown in radio frequency amplifier 60 shown in gradient amplifier 42 shown in Fig. 2, Fig. 3 and Fig. 4.Further, isolatedly also comprise AC-dc converter 92 without magnetic switch power supply 90, this AC-dc converter 92 is for receiving AC energy and DC power output to the first power cell 91.
Fig. 6 is a kind of isolated circuit diagram without magnetic switch power supply 90A of execution mode.Isolatedly comprise the first power cell 91, air-core transformer 94A and the second power cell 99 without magnetic switch power supply 90A.First power cell 91 is by air-core transformer 94A and the second power cell 99 electrical couplings.In the present embodiment, the first power cell 91 comprises half-bridge inverter.Second power cell 99 comprises rectifier 990 and filter capacitor Cf, therefore isolated without magnetic switch power supply 90A DC power output to load 900.In other implementations, the second power cell 99 can only comprise filter capacitor Cf, therefore isolated without magnetic switch power supply 90A output AC electric energy to load 900.
Isolatedly comprise AC-dc converter 92 further without magnetic switch power supply 90A, AC-dc converter 92 is arranged in the scanning room of magnetic resonance imaging system.AC-dc converter 92 is for converting AC energy 925 to direct current energy 926, and this direct current energy 926 is provided to the first power cell 91.In one embodiment, AC energy 925 can be provided by the AC power of outside.In the infinite execution mode of one, load 900 can be at least one in radio frequency amplifier 60 shown in gradient amplifier 42 shown in Fig. 2, Fig. 3 and gate drivers 35.
Please again consult Fig. 6, air-core transformer 94A comprises armature winding 940, secondary winding 950, first electric capacity Cp, the second electric capacity Cs.Secondary winding 950 and armature winding 940 magnetic couplings.First electric capacity Cp and the first power cell 91 electrical couplings, the second electric capacity Cs and the second power cell 99 electrical couplings.First electric capacity Cp and armature winding 940 are connected in series, and the second electric capacity Cs and secondary winding 950 are connected in series.
The equivalent-circuit model of air-core transformer 94A comprises intrinsic lumped-circuit parasitic antenna, and wherein this intrinsic lumped-circuit parasitic antenna comprises primary magnetic leakage inductance 942, primary magnetized inductance 944, secondary magnetic leakage inductance 952, secondary magnetizing inductance 954.For the ease of understanding, the magnetic core 95 of air-core transformer 94A is shown in broken lines, to distinguish the magneto-coupling effect between inductance 942,944,952,954 and armature winding 940 and secondary winding 950.
In an execution mode described, be isolatedly configured to zero voltage switch (ZVS, zero voltage switching) work pattern without magnetic switch power supply 90A, thus reduce the electromagnetic interference of isolated generation when working without magnetic switch power supply 90A.First electric capacity Cp and primary magnetic leakage inductance 942 are jointly with the primary series resonance frequency resonance expected; Second electric capacity Cs and secondary magnetic leakage inductance 952 are common with the secondary tandem resonance frequency resonance expected, thus create a further reduction the electromagnetic interference of isolated generation when working without magnetic switch power supply 90A.
In one embodiment, the frequency of the isolated harmonic signal produced when working without magnetic switch power supply 90A is outside the frequency range of the imaging bandwidth of magnetic resonance imaging system.
Fig. 7 is the isolated circuit diagram without magnetic switch power supply 90B of another kind of execution mode, and this is isolated is provided with air-core transformer 94B without magnetic switch power supply 90B.Isolatedly shown in Fig. 7 to be without the difference without magnetic switch power supply 90A isolated shown in magnetic switch power supply 90B and Fig. 6: the first electric capacity Cp and armature winding 940 are connected in parallel, and the second electric capacity Cs and secondary winding 950 are connected in parallel.
In one embodiment, be isolatedly configured to zero voltage switch (ZVS, Zero Voltage Switching) work pattern without magnetic switch power supply 90B, thus reduce the isolated electromagnetic interference produced when working without magnetic switch power supply 90B.First electric capacity Cp and primary magnetic leakage inductance 942 are jointly with the primary parallel resonance frequency resonance expected; Second electric capacity Cs and secondary magnetic leakage inductance 952 are common with the secondary parallel resonance frequency resonance expected, thus create a further reduction the electromagnetic interference of isolated generation when working without magnetic switch power supply 90B.
In one embodiment, the frequency of the isolated harmonic signal produced when working without magnetic switch power supply 90B is outside the frequency range of the imaging bandwidth of magnetic resonance imaging system.
Fig. 8 is integrated in the partial side view in cross section of the first printed circuit board (PCB) 900 and the second printed circuit board (PCB) 902 for air-core transformer 94B shown in air-core transformer 94A shown in Fig. 6 or Fig. 7.The armature winding 940 of air-core transformer 94A, 94B and the first electric capacity Cp are all integrated in the first printed circuit board (PCB) 900, air-core transformer 94A, the secondary winding 950 of 94B and the second electric capacity Cs and are all integrated in the second printed circuit board (PCB) 902.In a kind of concrete execution mode, the first electric capacity Cp and armature winding 940 all embed the first printed circuit board (PCB) 900, second electric capacity Cs and secondary winding 950 all embeds the second printed circuit board (PCB) 902.Therefore, the integrated level of air-core transformer 94A, 94B is improved.
Fig. 9 is integrated in the partial side view in cross section of the first flexible PCB 910 and the second flexible PCB 912 for air-core transformer 94B shown in air-core transformer 94A shown in Fig. 6 or Fig. 7.The armature winding 940 of air-core transformer 94A, 94B and the first electric capacity Cp are all integrated in the first flexible PCB 910, air-core transformer 94A, the secondary winding 950 of 94B and the second electric capacity Cs and are all integrated in the second flexible PCB 912.In a kind of concrete execution mode, the first electric capacity Cp and armature winding 940 all embed the first flexible PCB 910, second electric capacity Cs and secondary winding 950 all embeds the second flexible PCB 912.Therefore, the integrated level of air-core transformer 94A, 94B have also been obtained raising.
Figure 10 is the partial side view in cross section of the embedding of air-core transformer 94B shown in air-core transformer 94A shown in Fig. 6 or Fig. 7 multi-layer flexible circuit board 310.Flexible PCB 310 comprises top layer 102, ground floor 108, intermediate layer 104, the second layer 110 and bottom 106.Intermediate layer 104 is arranged between ground floor 108 and the second layer 110.Be understandable that, the number of plies of multi-layer flexible circuit board 310 can adjust according to actual needs.The armature winding 940 of air-core transformer 94A, 94B and the first electric capacity Cp all embed the second layer 110 that the ground floor 108, air-core transformer 94A of flexible PCB 310, the secondary winding 950 of 94B and the second electric capacity Cs all embed flexible PCB 310; Therefore, the integrated level of air-core transformer 94A, 94B have also been obtained raising.In addition, it should be added that, top layer 102 and bottom 106 all can be protective layer, for stoping external signal and air-core transformer 94A, the armature winding 940 of 94B and secondary winding 950, cross-coupling effect occur.
Figure 11 is the partial side view in cross section of the embedding of air-core transformer 94B shown in air-core transformer 94A shown in Fig. 6 or Fig. 7 multilayer board 320.Printed circuit board (PCB) 320 comprises top layer 122, ground floor 128, intermediate layer 124, the second layer 130 and bottom 126.Intermediate layer 124 is arranged between ground floor 128 and the second layer 130.Be understandable that, the number of plies of printing flexible PCB 320 can adjust according to actual needs.The armature winding 940 of air-core transformer 94A, 94B and the first electric capacity Cp all embed the second layer 130 that the ground floor 128, air-core transformer 94A of printed circuit board (PCB) 320, the secondary winding 950 of 94B and the second electric capacity Cs all embed printed circuit board (PCB) 320; Therefore, the integrated level of air-core transformer 94A, 94B have also been obtained raising.In addition, it should be added that, top layer 122 and bottom 126 all can be protective layer, for stoping external signal and air-core transformer 94A, the armature winding 940 of 94B and secondary winding 950, cross-coupling effect occur.
Figure 12 is a kind of schematic diagram of air-core transformer 200 of execution mode.It is isolated without magnetic switch power supply 90A that air-core transformer 200 can be applicable to shown in Fig. 6, and also namely air-core transformer 200 can replace the air-core transformer 94A shown in Fig. 6.It is an option that air-core transformer 200 also to can be applicable to shown in Fig. 7 isolated without magnetic switch power supply 90B, also namely air-core transformer 200 can replace the air-core transformer 94B shown in Fig. 7.Air-core transformer 200 comprises armature winding 202 and secondary winding 204, armature winding 202 and secondary winding 204 magnetic couplings.In a kind of concrete execution mode, armature winding 202 is compound winding with at least one in secondary winding 204, and this compound winding comprises at least one embedded capacitor.
Figure 13 is a kind of cross sectional view of compound winding 210 of execution mode.Compound winding 210 comprises the first conductive coil 26, second conductive coil 26 and dielectric layer 28, this first conductive coil 26 and the second conductive coil 26 to be all formed on dielectric layer 28 and this dielectric layer 28 between the first conductive coil 26 and the second conductive coil 26, dielectric layer 28 comprises embedded capacitor.In one embodiment, this first conductive coil 26 and the second conductive coil 26 utilize lamination to be formed at dielectric layer 28.
In one embodiment, dielectric layer 28 is made up of the dielectric material with high-k, such as ferroelectric ceramic.First conductive coil 26 and the second conductive coil 26 all can be made up of the conductive materials with good electrical conduction performance, such as copper.Because armature winding 202 and at least one in secondary winding 204 comprise embedded capacitor, therefore armature winding 202 and at least one in secondary winding 204 can play the effect of electric capacity.
In one embodiment, the leakage inductance of air-core transformer 200 and above-mentioned embedded capacitor are jointly with the series resonance frequency resonance expected or with the parallel resonance frequency resonance expected.
Figure 14 is the isolated circuit diagram without magnetic switch power supply 90C of another kind of execution mode.Isolatedly comprise the first power cell 91, two condenser type isolators 80 and the second power cell 99 without magnetic switch power supply 90C.First power cell 91 is by two condenser type isolators 80 and the second power cell 99 electrical couplings.In other embodiments, the first power cell 91 can also by condenser type isolator 80 and the second power cell 99 electrical couplings being greater than two.
Each condenser type isolator 80 comprises dielectric layer 84, primary metals plate 82 and secondary metal plate 85.Primary metals plate 82 and the first power cell 91 electrical couplings, secondary metal plate 85 and the second power cell 99 electrical couplings.Primary metals plate 82 and secondary metal plate 85 are formed on dielectric layer 84, and dielectric layer 84 is positioned at the centre of primary metals plate 82 and secondary metal plate 85.Condenser type isolator 80 utilizes electric field that electric energy is passed to secondary metal plate 85 from primary metals plate 82.In the present embodiment, the first power cell 91 comprises half-bridge inverter.Second power cell 99 comprises rectifier 990 and filter capacitor Cf, therefore isolated without magnetic switch power supply 90A DC power output to load 900.
Further, each condenser type isolator 80 also comprises resonant inductance 86, and primary metals plate 82 is by this resonant inductance 86 and first power cell 91 electrical couplings.
In one embodiment, be isolatedly configured to zero voltage switch (ZVS, zero voltage switching) work pattern without magnetic switch power supply 90C, thus reduce the isolated electromagnetic interference produced when working without magnetic switch power supply 90C.Each condenser type isolator 80 also comprises resonant capacitance, this resonant capacitance and resonant inductance 86 are connected in series, this resonant inductance 86 and resonant capacitance, jointly with the series resonance frequency resonance expected, thus create a further reduction the electromagnetic interference of isolated generation when working without magnetic switch power supply 90C.
In one embodiment, the frequency of the isolated harmonic signal produced when working without magnetic switch power supply 90C is outside the frequency range of the imaging bandwidth of magnetic resonance imaging system.
Figure 15 is the isolated circuit diagram without magnetic switch power supply 90D of another kind of execution mode.Isolatedly comprise the first power cell 91, two condenser type isolators 80 and the second power cell 99, two resonant inductances 86 without magnetic switch power supply 90C.Isolatedly shown in Figure 15 to be without the difference without magnetic switch power supply 90C isolated shown in magnetic switch power supply 90D and Figure 14: the second power cell 99 shown in Figure 15 is different from the second power cell 99 shown in Figure 14.In the present embodiment, shown in Figure 15, the second power cell 99 only comprises filter capacitor Cf, therefore isolated without magnetic switch power supply 90D output AC electric energy to load 900, meet the different demands of load 900.
Figure 16 is integrated in the partial side view in cross section of the first printed circuit board (PCB) 820 and the second printed circuit board (PCB) 850 for the isolator of condenser type shown in Figure 14 or Figure 15 80.Primary metals plate 82 and resonant inductance 86 are all integrated in the first printed circuit board (PCB) 820, and secondary metal plate 85 is integrated in the second printed circuit board (PCB) 850.Dielectric layer 84 is arranged between the first printed circuit board (PCB) 820 and the second printed circuit board (PCB) 850.In a kind of concrete execution mode, primary metals plate 82 and resonant inductance 86 all embed the first printed circuit board (PCB) 820, and secondary metal plate 85 embeds the second printed circuit board (PCB) 850.In one embodiment, dielectric layer 84 can be a kind of printed circuit board (PCB) typically comprising dielectric substance, and therefore, the first printed circuit board (PCB) 820, dielectric layer 84, second printed circuit board (PCB) 850 can form the printed circuit board (PCB) of multilayer jointly.
Figure 17 is integrated in the partial side view in cross section of the first flexible PCB 822 and the second flexible PCB 852 for the isolator of condenser type shown in Figure 14 or Figure 15 80.Primary metals plate 82 and resonant inductance 86 are all integrated in the first flexible PCB 822, and secondary metal plate 85 is integrated in the second flexible PCB 852.Dielectric layer 84 is arranged between the first flexible PCB 822 and the second flexible PCB 852.In a kind of concrete execution mode, primary metals plate 82 and resonant inductance 86 all embed the first flexible PCB 822, and secondary metal plate 85 embeds the second flexible PCB 852.In one embodiment, dielectric layer 84 can be a kind of flexible PCB typically comprising dielectric substance, and therefore, the first flexible PCB 822, dielectric layer 84, second flexible PCB 852 can form the flexible PCB of multilayer jointly.
Figure 18 is the isolated circuit diagram without magnetic switch power supply 90E of another kind of execution mode, and this is isolated utilizes piezoelectric transformer 70 without magnetic switch power supply 90E.First power cell 91 is by piezoelectric transformer 70 and the second power cell 99 electrical couplings.In one embodiment, piezoelectric transformer 70 comprises piezoceramic material.Mechanical energy is passed to the output of piezoelectric transformer 70 by piezoceramic material from the input of piezoelectric transformer 70, the mechanical energy being passed to the output of piezoelectric transformer 70 is converted into electric energy, and this electric energy is provided to the second power cell 99.
In one embodiment, the second power cell 99 comprises rectifier 990 and filter capacitor Cf, therefore isolatedly provides direct current energy to load 900 without magnetic switch power supply 90E.
In one embodiment, be isolatedly configured to zero voltage switch (ZVS, zero voltage switching) work pattern without magnetic switch power supply 90E, thus reduce the isolated electromagnetic interference produced when working without magnetic switch power supply 90E.Isolatedly also comprise resonant capacitance Cr and resonant inductance Lr without magnetic switch power supply 90E, resonant capacitance Cr and resonant inductance Lr electrical couplings, resonant inductance Lr and the first power cell 91 electrical couplings, resonant capacitance Cr and piezoelectric transformer 70 are connected in series; Resonant capacitance Cr and resonant inductance Lr, jointly with the series resonance frequency resonance expected, thus create a further reduction the isolated electromagnetic interference produced when working without magnetic switch power supply 90E.
In one embodiment, the frequency of the isolated harmonic signal produced when working without magnetic switch power supply 90E is outside the frequency range of the imaging bandwidth of magnetic resonance imaging system 10.
Figure 19 is the isolated circuit diagram without magnetic switch power supply 90F of another kind of execution mode, and this is isolated utilizes piezoelectric transformer 70 without magnetic switch power supply 90F.Isolatedly shown in Figure 19 without the difference without magnetic switch power supply 90E isolated shown in magnetic switch power supply 90F and Figure 18 be: resonant capacitance Cr and piezoelectric transformer 70 are connected in parallel; Resonant capacitance Cr and resonant inductance Lr, jointly with the parallel resonance frequency resonance expected, thus create a further reduction the isolated electromagnetic interference produced when working without magnetic switch power supply 90F.
Figure 20 is the isolated circuit diagram without magnetic switch power supply 90G of another kind of execution mode, and this is isolated utilizes piezoelectric transformer 70 without magnetic switch power supply 90G.Isolatedly shown in Figure 20 be: the second power cell 99 only comprises filter capacitor Cf therefore, isolatedly provide AC energy to load 900 without magnetic switch power supply 90G without the difference without magnetic switch power supply 90E isolated shown in magnetic switch power supply 90G and Figure 18.
Although describe the present invention in conjunction with specific execution mode, those skilled in the art will appreciate that and can make many amendments and modification to the present invention.Therefore, recognize, the intention of claims is to cover all such modifications in true spirit of the present invention and scope and modification.
Claims (19)
1. isolatedly it is characterized in that without a magnetic switch power supply, this is isolated comprises without magnetic switch power supply:
First power cell;
Second power cell; This second power cell is by any one in air-core transformer, piezoelectric transformer and at least two condenser type isolators and the first power cell electrical couplings;
This is isolated is arranged in the scanning room of magnetic resonance imaging system without magnetic switch power supply, powers at least one in the radio frequency amplifier, gradient amplifier and the gate drivers that comprise to magnetic resonance imaging system; Wherein, this is isolated without producing the electromagnetic interference being roughly zero during magnetic switch power work.
2. isolatedly to it is characterized in that without magnetic switch power supply as claimed in claim 1, described air-core transformer comprises:
Armature winding;
Secondary winding, for armature winding magnetic couplings;
First electric capacity; And
Second electric capacity;
Wherein, the primary magnetic leakage inductance of this first electric capacity and air-core transformer is jointly with the primary series resonance frequency resonance expected or with the primary parallel resonance frequency resonance expected; The secondary magnetic leakage inductance of this second electric capacity and air-core transformer is jointly with the secondary tandem resonance frequency resonance expected or with the secondary parallel resonance frequency resonance expected.
3. as claimed in claim 2 isolated without magnetic switch power supply, it is characterized in that: this first electric capacity and armature winding are all integrated in the first flexible PCB or printed circuit board (PCB), this second electric capacity and secondary winding are all integrated in the second flexible PCB or printed circuit board (PCB).
4. as claimed in claim 3 isolated without magnetic switch power supply, it is characterized in that: this first electric capacity and armature winding all embed the first flexible PCB or printed circuit board (PCB), this second electric capacity and secondary winding all embed the second flexible PCB or printed circuit board (PCB).
5. as claimed in claim 2 isolated without magnetic switch power supply, it is characterized in that: this first electric capacity and armature winding all embed the ground floor of flexible PCB or printed circuit board (PCB), this second electric capacity and secondary winding all embed the second layer of flexible PCB or printed circuit board (PCB).
6. isolatedly to it is characterized in that without magnetic switch power supply as claimed in claim 1, this air-core transformer comprises:
Armature winding; And
Secondary winding, for armature winding magnetic couplings;
Wherein, at least one in armature winding and secondary winding comprises compound winding, this compound winding comprises the first conductive coil, the second conductive coil and dielectric layer, this first conductive coil and the second conductive coil to be all formed on dielectric layer and this dielectric layer between the first conductive coil and the second conductive coil, this dielectric layer comprises embedded capacitor.
7. as claimed in claim 6 isolated without magnetic switch power supply, it is characterized in that: the leakage inductance of described air-core transformer and described embedded capacitor are jointly with the series resonance frequency resonance expected or with the parallel resonance frequency resonance expected.
8. as claimed in claim 1 isolated without magnetic switch power supply, it is characterized in that: each condenser type isolator comprises:
Dielectric layer;
Resonant inductance;
Primary metals plate, by this resonant inductance and the first power cell electrical couplings;
Secondary metal plate, with the second power cell electrical couplings;
Wherein, this resonant inductance and primary metals plate are all integrated in the first flexible PCB or printed circuit board (PCB); This secondary metal plate is integrated in the second flexible PCB or printed circuit board (PCB); This dielectric layer is arranged between the first flexible PCB or printed circuit board (PCB) and the second flexible PCB or printed circuit board (PCB), and this condenser type isolator utilizes electric field that electric energy is passed to secondary metal plate from primary metals plate.
9. as claimed in claim 8 isolated without magnetic switch power supply, it is characterized in that: each condenser type isolator also comprises resonant capacitance, this resonant capacitance and this resonant inductance are connected in series, and this resonant capacitance and this resonant inductance are jointly with the series resonance frequency resonance expected.
10. as claimed in claim 9 isolated without magnetic switch power supply, it is characterized in that: this resonant inductance and primary metals plate all embed the first flexible PCB or printed circuit board (PCB), this secondary metal plate embeds the second flexible PCB or printed circuit board (PCB).
11. is as claimed in claim 1 isolated without magnetic switch power supply, it is characterized in that: this piezoelectric transformer comprises piezoceramic material, mechanical energy is passed to the output of this piezoelectric transformer by this piezoceramic material from the input of this piezoelectric transformer, the described mechanical energy being passed to the output of piezoelectric transformer is converted into electric energy, and this electric energy is provided to the second power cell;
This is isolated also comprises and the resonant inductance of the first power cell electrical couplings and the resonant capacitance with resonant inductance electrical couplings without magnetic switch power supply, this resonant capacitance and this piezoelectric transformer are connected in series or are connected in parallel, and this resonant inductance and resonant capacitance are jointly with the series resonance frequency resonance expected or with the parallel resonance frequency resonance expected.
12. is as claimed in claim 1 isolated without magnetic switch power supply, it is characterized in that: this is isolated also comprises AC-dc converter without magnetic switch power supply, this AC-dc converter is used for converting AC energy to direct current energy, and this direct current energy is provided to the first power cell.
13. is as claimed in claim 1 isolated without magnetic switch power supply, it is characterized in that: the frequency of this isolated harmonic signal without producing during magnetic switch power work is outside the frequency range of the imaging bandwidth of magnetic resonance imaging system.
14. 1 kinds of magnetic resonance imaging systems, is characterized in that, this magnetic resonance imaging system comprises:
Main magnet, for generation of main field;
Gradient coil assembly;
Gradient amplifier, for encourage this gradient coil assembly produce in selected gradient axes gradient magnetic with by this Actions of Gradient Magnetic Field to main field;
Radio frequency coil assemblies;
Radio frequency amplifier, produces radiofrequency signal for excitation radio frequency coil assembly; And
Isolated without magnetic switch power supply, in the scanning room being arranged at magnetic resonance imaging system and for providing electric energy at least one in gradient amplifier and radio frequency amplifier; This is isolated comprises without magnetic switch power supply:
First power cell;
Second power cell; This second power cell is by any one in air-core transformer, piezoelectric transformer and at least two condenser type isolators and the first power cell electrical couplings; This is isolated without producing the electromagnetic interference being roughly zero during magnetic switch power work.
15. magnetic resonance imaging systems as claimed in claim 14, it is characterized in that, described air-core transformer comprises:
Armature winding;
Secondary winding, for armature winding magnetic couplings;
First electric capacity; And
Second electric capacity;
Wherein, the primary magnetic leakage inductance of this first electric capacity and air-core transformer is jointly with the primary series resonance frequency resonance expected or with the primary parallel resonance frequency resonance expected; The secondary magnetic leakage inductance of this second electric capacity and air-core transformer is jointly with the secondary tandem resonance frequency resonance expected or with the secondary parallel resonance frequency resonance expected;
This first electric capacity and armature winding are all integrated in the first flexible PCB or printed circuit board (PCB), and this second electric capacity and secondary winding are all integrated in the second flexible PCB or printed circuit board (PCB).
16. magnetic resonance imaging systems as claimed in claim 15, it is characterized in that: this first electric capacity and armature winding all embed the first flexible PCB or printed circuit board (PCB), this second electric capacity and secondary winding all embed the second flexible PCB or printed circuit board (PCB).
17. magnetic resonance imaging systems as claimed in claim 14, it is characterized in that, each condenser type isolator comprises:
Dielectric layer;
Resonant inductance;
Primary metals plate, by this resonant inductance and the first power cell electrical couplings;
Secondary metal plate, with the second power cell electrical couplings;
Wherein, this resonant inductance and primary metals plate all embed the first flexible PCB or printed circuit board (PCB); This secondary metal plate embeds the second flexible PCB or printed circuit board (PCB); This dielectric layer is arranged between the first flexible PCB or printed circuit board (PCB) and the second flexible PCB or printed circuit board (PCB), and this condenser type isolator utilizes electric field that electric energy is passed to secondary metal plate from primary metals plate.
18. 1 kinds of air-core transformer, is characterized in that, this air-core transformer comprises:
Armature winding;
Secondary winding, for armature winding magnetic couplings;
First electric capacity; And
Second electric capacity;
Wherein, the primary magnetic leakage inductance of this first electric capacity and air-core transformer is jointly with the primary series resonance frequency resonance expected or with the primary parallel resonance frequency resonance expected; The secondary magnetic leakage inductance of this second electric capacity and air-core transformer is jointly with the secondary tandem resonance frequency resonance expected or with the secondary parallel resonance frequency resonance expected;
This first electric capacity and armature winding are all integrated in the first flexible PCB or printed circuit board (PCB), and this second electric capacity and secondary winding are all integrated in the second flexible PCB or printed circuit board (PCB).
19. air-core transformer as claimed in claim 18, it is characterized in that: this first electric capacity and armature winding all embed the first flexible PCB or printed circuit board (PCB), this second electric capacity and secondary winding all embed the second flexible PCB or printed circuit board (PCB).
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| CN201310713389.XA CN104734511A (en) | 2013-12-20 | 2013-12-20 | Coreless transformer, isolation type non-magnetic switching power supply and magnetic resonance imaging system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652224A (en) * | 2014-11-12 | 2016-06-08 | 通用电气公司 | Magnetic resonance imaging system and operation method thereof |
| CN107638636A (en) * | 2017-10-26 | 2018-01-30 | 深圳生命狗大健康管理有限公司 | Ultrasonic wave mammary gland physiotherapeutic equipment for removing stagnancy |
| CN107809178A (en) * | 2017-11-03 | 2018-03-16 | 上海联影医疗科技有限公司 | A kind of high pressure generator and its control method |
| CN108512425A (en) * | 2017-02-23 | 2018-09-07 | 通用电气公司 | Energy conversion device, and for for oil exploration equipment power for electric installation |
| CN109143130A (en) * | 2017-06-27 | 2019-01-04 | 通用电气公司 | Magnetic resonance imaging switching power amplifier system and method |
| US20190235035A1 (en) * | 2018-01-29 | 2019-08-01 | General Electric Company | Gate driver |
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| CN111337866A (en) * | 2018-12-19 | 2020-06-26 | 通用电气公司 | Switching power supply and magnetic resonance imaging system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101027734A (en) * | 2004-09-24 | 2007-08-29 | 皇家飞利浦电子股份有限公司 | Transformer |
| CN102197446A (en) * | 2008-10-29 | 2011-09-21 | 通用电气公司 | Inductive and capacitive components integration structure |
| US20110291657A1 (en) * | 2010-05-25 | 2011-12-01 | General Electric Company | Magnetic resonance imaging compatible switched mode power supply |
| CN102470250A (en) * | 2009-08-11 | 2012-05-23 | 皇家飞利浦电子股份有限公司 | Non-magnetic high voltage charging system for use in cardiac stimulation devices |
| US20130300209A1 (en) * | 2012-05-11 | 2013-11-14 | Momentum Dynamics Corporation | Mthod of and apparatus for generating an adjustable reactance |
-
2013
- 2013-12-20 CN CN201310713389.XA patent/CN104734511A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101027734A (en) * | 2004-09-24 | 2007-08-29 | 皇家飞利浦电子股份有限公司 | Transformer |
| CN102197446A (en) * | 2008-10-29 | 2011-09-21 | 通用电气公司 | Inductive and capacitive components integration structure |
| CN102470250A (en) * | 2009-08-11 | 2012-05-23 | 皇家飞利浦电子股份有限公司 | Non-magnetic high voltage charging system for use in cardiac stimulation devices |
| US20110291657A1 (en) * | 2010-05-25 | 2011-12-01 | General Electric Company | Magnetic resonance imaging compatible switched mode power supply |
| US20130300209A1 (en) * | 2012-05-11 | 2013-11-14 | Momentum Dynamics Corporation | Mthod of and apparatus for generating an adjustable reactance |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652224A (en) * | 2014-11-12 | 2016-06-08 | 通用电气公司 | Magnetic resonance imaging system and operation method thereof |
| CN105652224B (en) * | 2014-11-12 | 2018-11-16 | 通用电气公司 | Magnetic resonance imaging system and its operating method |
| CN108512425A (en) * | 2017-02-23 | 2018-09-07 | 通用电气公司 | Energy conversion device, and for for oil exploration equipment power for electric installation |
| CN109143130B (en) * | 2017-06-27 | 2022-04-15 | 通用电气公司 | Magnetic resonance imaging system, method for implementing the system and switching power amplifier |
| CN109143130A (en) * | 2017-06-27 | 2019-01-04 | 通用电气公司 | Magnetic resonance imaging switching power amplifier system and method |
| CN107638636A (en) * | 2017-10-26 | 2018-01-30 | 深圳生命狗大健康管理有限公司 | Ultrasonic wave mammary gland physiotherapeutic equipment for removing stagnancy |
| CN107638636B (en) * | 2017-10-26 | 2024-03-26 | 深圳生命狗大健康管理有限公司 | Ultrasonic mammary gland dredging physiotherapy device |
| US11864302B2 (en) | 2017-11-03 | 2024-01-02 | Shanghai United Imaging Healthcare Co., Ltd. | High voltage generator and control methods thereof |
| CN107809178A (en) * | 2017-11-03 | 2018-03-16 | 上海联影医疗科技有限公司 | A kind of high pressure generator and its control method |
| US11116068B2 (en) | 2017-11-03 | 2021-09-07 | Shanghai Unted Imaging Healthcare Co., Ltd. | High voltage generator and control methods thereof |
| US20190235035A1 (en) * | 2018-01-29 | 2019-08-01 | General Electric Company | Gate driver |
| US10809326B2 (en) * | 2018-01-29 | 2020-10-20 | GE Precision Healthcare LLC | Gate driver |
| CN111337866A (en) * | 2018-12-19 | 2020-06-26 | 通用电气公司 | Switching power supply and magnetic resonance imaging system |
| CN112444767A (en) * | 2019-08-30 | 2021-03-05 | 通用电气精准医疗有限责任公司 | Radio frequency power converter and radio frequency transmission system for magnetic resonance imaging |
| CN110988762A (en) * | 2019-12-05 | 2020-04-10 | 深圳市特深电气有限公司 | Radio frequency power amplifier and radio frequency signal excitation circuit of magnetic resonance imaging system |
| CN114910837A (en) * | 2021-02-10 | 2022-08-16 | 清华大学 | Magnetic field enhancement assembly and magnetic field enhancement device |
| CN114910837B (en) * | 2021-02-10 | 2024-04-23 | 清华大学 | Magnetic field enhancement assembly and magnetic field enhancement device |
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Application publication date: 20150624 |