阅读说明：本技术 一种双定子场调制超导电机中电枢反应的屏蔽方法 (Modulate the screen method of armature-reaction in superconducting motor in a kind of bimorph transducer field ) 是由 程明 朱新凯 王玉彬 于 2019-08-08 设计创作，主要内容包括：本发明公开一种双定子场调制超导电机中电枢反应的屏蔽方法,采用双定子结构,内定子、转子和外定子同轴心排列。外定子安放铜线电枢绕组,内定子上安放由超导线材绕制的超导磁体,其主要由超导线圈和低温恒温器组成。在超导磁体的外侧布置导磁环,合理设计外定子齿数、转子的凸极数和导磁环,使电枢反应磁场尽可能多的通过外定子、转子凸极和导磁环闭合,使其尽量远离超导线圈。同时在导磁环上布置鼠笼式阻尼屏蔽层,以抑制电枢反应的基波及低次谐波,在低温恒温器内侧布置铜屏蔽层,将超导线圈包围,以抑制电枢反应的高次谐波。本发明可以有效地减小超导绕组中的交流损耗,避免超导绕组因交流损耗过大而引发的失超。(The present invention discloses the screen method of armature-reaction in a kind of bimorph transducer field modulation superconducting motor, using double-stator structure, inner stator, rotor and the concentric arrangement of external stator.External stator places copper wire armature winding, and the superconducting magnet by superconducting wire coiling is placed on inner stator, is mainly made of superconducting coil and cryostat.Magnetic guiding loop is arranged in the outside of superconducting magnet, is rationally designed the salient pole number and magnetic guiding loop of the external stator number of teeth, rotor, is kept armature reacting field as much as possible and be closed by external stator, rotor with salient pole and magnetic guiding loop, make it as far as possible far from superconducting coil.Arrange that squirrel-cage damping shielded layer, in cryostat disposed inboard copper shield, superconducting coil is surrounded to inhibit the fundamental wave and low-order harmonic of armature-reaction, on magnetic guiding loop simultaneously to inhibit the higher hamonic wave of armature-reaction.The present invention can effectively reduce the A.C.power loss in superconduction winding, avoid superconduction winding because of A.C.power loss is excessive quenching of causing.)

1. the screen method of armature-reaction in a kind of bimorph transducer field modulation superconducting motor, it is characterised in that:

Firstly, superconduction excitation winding and armature winding are spatially segregated from using double-stator structure, to weaken armature-reaction magnetic The direct-coupling of field and superconducting coil；

Then, magnetic guiding loop is arranged on the outside of superconduction excitation winding, rationally designs the external stator number of teeth, rotor magnetic inductive block number and magnetic conduction Ring, make armature reacting field as much as possible by external stator, rotor magnetic inductive block and magnetic guiding loop closure, and not pass through or It is not directly placed on superconducting coil；

Finally, installing squirrel-cage damping shielding on magnetic guiding loop using the principle of Faraday's electromagnetic induction law and Lenz's law Layer, with the alternating magnetic field for inhibiting armature-reaction fundamental wave and low-order harmonic to cause around superconducting coil；

The copper or aluminum metal shielded layer that high conductivity is installed on the outside of superconducting coil, using armature-reaction higher hamonic wave in metal The vortex caused on shielded layer is to offset the higher hamonic wave around superconducting coil；

Wherein the Double-stator motor structure includes successively external stator (1), the rotor (2) and interior of concentric shafts arrangement from outside to inside Stator (3)；The external stator (1) includes the copper electricity in external stator yoke (4), external stator tooth (5) and insertion external stator tooth (5) slot Pivot winding (6)；

The inner stator (3) includes inner stator yoke (7), inner stator tooth (8) and the superconducting magnet being nested on inner stator tooth (8) (9)；The superconducting magnet (9) is mainly by superconducting coil (10), the copper screen of cryostat (11) and encirclement superconducting coil (10) Layer (12) composition is covered, magnetic guiding loop (13) are installed in the outside of superconducting magnet (9)；The magnetic guiding loop (13) is by pole shoe shape magnetic inductive block (14) It is formed with magnetic conduction bridge (15), magnetic conduction bridge connects magnetic inductive block to form an entirety；

The number of the pole shoe shape magnetic inductive block (14) is equal with the number of superconducting magnet (9), and is located at superconducting magnet (9) just Top, squirrel-cage damping shielded layer (16) are mounted on magnetic guiding loop (13)；Squirrel-cage damping shielded layer (16) is by being arranged in Pole shoe shape magnetic inductive block (14) if on dry copper amortisseur bar (17) composition；The rotor (2) is by rectangular-shaped magnetic inductive block 18 and non- Magnetic inductive block (19) along the circumferential direction evenly distributed composition.

2. the screen method of armature-reaction, feature in a kind of bimorph transducer field modulation superconducting motor according to claim 1 It is: using copper shield (12), magnetic guiding loop (13) and squirrel-cage damping shielded layer in bimorph transducer field modulation superconducting motor (16) combined method inhibits influence of the armature-reaction to superconducting coil.

3. the screen method of armature-reaction, feature in a kind of bimorph transducer field modulation superconducting motor according to claim 1 Be: the fundamental wave and each harmonic that armature-reaction is utilized generate in squirrel-cage damping shielded layer (16) and copper shield (12) Induced current, spatially generate with the reversed induced magnetic field of armature-reaction, to inhibit the influence of armature-reaction.

4. the screen method of armature-reaction, feature exist in a kind of bimorph transducer field modulation superconducting motor as described in claim 1 In high conductivity materials such as the copper shield (12) are mountable to the internal or external of cryostat (11), and aluminium can be used Material production.

5. the screen method of armature-reaction, feature exist in a kind of bimorph transducer field modulation superconducting motor as described in claim 1 In: the center line of the pole shoe shape magnetic inductive block (14) is aligned with the center line of superconducting magnet (9).

6. the screen method of armature-reaction, feature exist in a kind of bimorph transducer field modulation superconducting motor as described in claim 1 In the number of the copper amortisseur bar (17) can carry out adaptability design；The copper amortisseur bar (17) can equidistantly be evenly distributed on On pole shoe shape magnetic inductive block (14), can also unevenly it be distributed with unequal spacing；The copper amortisseur bar (17) can be with partial shorts It can all be shorted；The high conductivity materials such as aluminium substitution can also be used in copper amortisseur bar (17).

7. the screen method of armature-reaction, feature exist in a kind of bimorph transducer field modulation superconducting motor as described in claim 1 Magnetic inductive block number Nr in, the number N of teeth t of the external stator (1), rotor (2), the pole shoe shape magnetic inductive block in magnetic guiding loop (13) (14) number Np can need to design according to application, but external stator number N of teeth t must make armature winding 6 constitute Ps to the fractional-slot collection of pole Middle winding；Moreover, on the number Nr and magnetic guiding loop of the number of pole-pairs Ps of armature winding, rotor magnetic inductive block magnetic inductive block number Np, three It must satisfy relationship between person: Nr > Ps > Np and Ps+Np/2=Nr.

8. the screen method of armature-reaction, feature exist in a kind of bimorph transducer field modulation superconducting motor as described in claim 1 In permeability magnetic material or non-magnet material manufacture can be selected in the inner stator yoke (7) and inner stator tooth (8).

Technical field

The present invention relates to armature-reactions in superconductor technology application field more particularly to a kind of bimorph transducer field modulation superconducting motor Screen method.

Background technique

In order to solve, the coolant liquid dynamic sealing that current superconducting motor faces is complicated, electric brush slip ring reliability is low, torque tubes The problems such as difficult design, a kind of superconducting motor based on magnetic field modulation principle is receive more and more attention, for example superconduction is opened Close flux linkage motor, superconduction vernier motor, superconducting magnetic gear motor, bimorph transducer superconduction field modulating motor, birotor superconduction vernier electricity Machine etc..But it is not difficult to find that there are similitudes in structure for this kind of field modulation superconducting motor, it may be assumed that armature winding and excitation winding (two Person can by superconducting wire coiling, can also one of them by superconducting wire coiling) be all located on stator and (the same stator can be located at On, may be alternatively located on two spatially relatively independent stators), INDIRECT COUPLING is realized by the modulating action of salient pole tooth.Due to Armature winding and excitation winding are all static, thus can be achieved at the same time coolant liquid static sealing and electric current transmission it is brushless Change.

But magnetic field modulation class superconducting motor is but faced with a common problem, i.e. armature reacting field can reduce superconduction The current-carrying capability of winding, the A.C.power loss for increasing superconduction winding.In traditional revolving-field type superconduction excitation magnetic synchronization motor, electricity Pivot magnetic reaction fields and the superconduction winding synchronous rotary on space-time, the fundamental wave magnetic field of armature-reaction are static relative to superconduction winding , i.e. the fundamental wave magnetic field of the armature-reaction stationary magnetic field that relative to superconduction winding is an outside, therefore the fundamental wave magnetic of armature-reaction Field will not cause A.C.power loss in DC superconducting excitation winding.But in magnetic field modulation class superconduction excitation magnetic synchronization motor, armature Winding and superconduction excitation winding be all it is static, armature winding is passed through the armature reacting field generated after alternating current relative to static Superconduction winding for be movement.That is, fundamental wave and harmonic field that armature-reaction includes relative to superconduction winding all It is external alternating magnetic field, A.C.power loss can be caused in superconduction excitation winding.In addition, armature reacting field can also be encouraged in superconduction Cause periodically variable induced potential in magnetic winding, and then periodic induced current occurs.It is straight in superconduction excitation winding Galvanic electricity is superimposed induced current, will cause the fluctuation of exciting current.In short, the armature reacting field in magnetic field modulation class superconducting motor It is the magnetic field of external alternation relative to superconduction winding, can both causes the A.C.power loss of superconduction winding, also will cause in superconduction winding Current fluctuation.If taking no action to the influence for effectively shielding armature reacting field to superconduction winding, it will influence superconduction The safe operation of winding.

Summary of the invention

The invention proposes a kind of bimorph transducer field modulation superconducting motor in armature-reaction screen method,

Firstly, superconduction excitation winding and armature winding are spatially segregated from using double-stator structure, to weaken armature-reaction magnetic The direct-coupling of field and superconducting coil；

Then, magnetic guiding loop is arranged on the outside of superconduction excitation winding, rationally designs the external stator number of teeth, rotor magnetic inductive block number and magnetic conduction Ring, make armature reacting field as much as possible by external stator, rotor magnetic inductive block and magnetic guiding loop closure, and not pass through or It is not directly placed on superconducting coil；

Finally, installing squirrel-cage damping shielding on magnetic guiding loop using the principle of Faraday's electromagnetic induction law and Lenz's law Layer, with the alternating magnetic field for inhibiting armature-reaction fundamental wave and low-order harmonic to cause around superconducting coil.Pacify on the outside of superconducting coil Fill high conductivity copper or aluminum metal shielded layer, using the vortex that armature-reaction higher hamonic wave causes on metal screen layer come Offset the higher hamonic wave around superconducting coil；

Wherein the Double-stator motor structure includes external stator, rotor and the inner stator that successively concentric shafts arrange from outside to inside；Institute Stating external stator includes the copper armature winding in external stator yoke, external stator tooth and insertion external stator tooth socket；

The inner stator includes inner stator yoke, inner stator tooth and the superconducting magnet being nested on inner stator tooth；The superconducting magnet Mainly it is made of the copper shield of superconducting coil, cryostat and encirclement superconducting coil；It installs in the outside of the superconducting magnet Magnetic guiding loop；The magnetic guiding loop is made of pole shoe shape magnetic inductive block and magnetic conduction bridge, and magnetic conduction bridge connects pole shoe shape magnetic inductive block to be formed One entirety；

The number of the pole shoe shape magnetic inductive block is equal with the number of superconducting magnet, and is located at the surface of superconducting magnet, mouse cage Formula damping shielded layer is mounted on magnetic guiding loop；If squirrel-cage damping shielded layer is by the dry copper that is arranged on pole shoe shape magnetic inductive block Amortisseur bar composition；The rotor is formed by rectangular-shaped magnetic inductive block and non-magnetic piece are along the circumferential direction evenly distributed.

Further improvement lies in that: using copper shield, magnetic guiding loop and squirrel-cage resistance in bimorph transducer field modulation superconducting motor The combined method of Buddhist nun's shielded layer inhibits influence of the armature-reaction to superconducting coil.

Further improvement lies in that: the fundamental wave and each harmonic that armature-reaction is utilized are in squirrel-cage damping shielded layer and copper screen The induced current generated on layer is covered, spatially generation and the reversed induced magnetic field of armature-reaction, to inhibit the shadow of armature-reaction It rings.

Further improvement lies in that: the copper shield is mountable to the internal or external of cryostat, and aluminium can be used Etc. high conductivity materials production.

Further improvement lies in that: the center line of the pole shoe shape magnetic inductive block is aligned with the center line of superconducting magnet.

Further improvement lies in that: the number of the copper amortisseur bar can carry out adaptability design；Between the copper amortisseur bar can wait Away from being evenly distributed on pole shoe shape magnetic inductive block, can also be unevenly distributed with unequal spacing；The copper amortisseur bar can part it is short Connecing all to be shorted；The high conductivity materials such as aluminium substitution can also be used in copper amortisseur bar.

Further improvement lies in that: the number N of teeth t of the external stator, the magnetic inductive block number Nr in rotor, the pole shoe in magnetic guiding loop Shape magnetic inductive block number Np can need to design according to application, but external stator number N of teeth t must make armature winding constitute Ps to the score of pole Slot concentratred winding；Moreover, on the number Nr and magnetic guiding loop of the number of pole-pairs Ps of armature winding, rotor magnetic inductive block magnetic inductive block number Np must satisfy relationship between three: Nr > Ps > Np and Ps+Np/2=Nr.

Permeability magnetic material or non-magnet material manufacture can be selected in the inner stator yoke and inner stator tooth.

The present invention uses double-stator structure, is referred to as inner stator and external stator, installation salient pole turns between two stators Son, inner stator, rotor and the concentric arrangement of external stator.External stator places copper wire armature winding, places on inner stator by superconducting line The superconducting magnet of material coiling, is mainly made of superconducting coil and cryostat.Magnetic guiding loop is arranged in the outside of superconducting magnet, Rationally design the external stator number of teeth, rotor salient pole number and magnetic guiding loop, keep armature reacting field as much as possible by external stator, turn Sub- salient pole and magnetic guiding loop closure, make it as far as possible far from superconducting coil.Arrange that squirrel-cage damps shielded layer on magnetic guiding loop simultaneously, with Inhibit the fundamental wave and low-order harmonic of armature-reaction.In addition, in cryostat disposed inboard copper shield, by superconducting coil packet It encloses, to inhibit the higher hamonic wave of armature-reaction.

The utility model has the advantages that in magnetic field modulation class superconducting motor, use the design method of above-mentioned shielding armature-reaction can be with The effective A.C.power loss reduced in superconduction winding avoids superconduction winding because of A.C.power loss is excessive quenching of causing.Specifically It is reflected in following two points:

1. being avoided that armature-reaction acts directly in superconduction winding, the current-carrying capability of superconduction winding not only can guarantee, but also can avoid Because of the magnetic hystersis loss for the superconduction winding that armature-reaction causes.

2. the induced current caused in superconduction winding by armature-reaction can be inhibited, the electric current inside superconduction winding can be weakened Fluctuation, to weaken the transmission loss in superconduction winding.

Detailed description of the invention

Fig. 1 is overall structure schematic cross-section of the invention.

Fig. 2 is the schematic diagram that squirrel-cage damps shielded layer and magnetic guiding loop.

Fig. 3 is the schematic cross-section of copper shield.

Fig. 4 is that superconducting motor is modulated using certain point on the superconducting coil before and after the suppressing method of this patent proposition in bimorph transducer field Harmonic field comparison figure；

Fig. 5 is that superconducting motor is modulated using the sense in some superconducting coil before and after the suppressing method of this patent proposition in bimorph transducer field Answer the comparison figure of potential (before inhibition)；

Fig. 6 is bimorph transducer field modulation superconducting motor using in some superconducting coil before and after the suppressing method of this patent proposition The comparison figure of induced potential (after inhibition).

Specific embodiment

The screen method of armature-reaction in a kind of bimorph transducer field modulation superconducting motor of the present embodiment, firstly, using double fixed Superconduction excitation winding and armature winding are spatially segregated from by minor structure, to weaken the direct of armature reacting field and superconducting coil Coupling；

Then, magnetic guiding loop is arranged on the outside of superconduction excitation winding, rationally designs the external stator number of teeth, rotor magnetic inductive block number and magnetic conduction Ring, make armature reacting field as much as possible by external stator, rotor magnetic inductive block and magnetic guiding loop closure, and not pass through or It is not directly placed on superconducting coil；

Using the principle of Faraday's electromagnetic induction law and Lenz's law, squirrel-cage is installed on magnetic guiding loop and damps shielded layer, with The alternating magnetic field for inhibiting armature-reaction fundamental wave and low-order harmonic to cause around superconducting coil；

Finally, installing the copper or aluminum metal shielded layer of high conductivity on the outside of superconducting coil, armature-reaction higher hamonic wave is utilized The vortex caused on metal screen layer is to offset the higher hamonic wave around superconducting coil.

Wherein the Double-stator motor structure includes successively external stator 1, the rotor 2 and interior of concentric shafts arrangement from outside to inside Stator 3；The external stator 1 includes the copper armature winding 6 in external stator yoke 4, external stator tooth 5 and insertion 5 slot of external stator tooth；

The inner stator 3 includes inner stator yoke 7, inner stator tooth 8 and the superconducting magnet 9 being nested on inner stator tooth 8；The superconduction Magnet 9 is mainly made of the copper shield 12 of superconducting coil 10, cryostat 11 and encirclement superconducting coil 10, superconducting magnet 9 Outside install magnetic guiding loop 13；The magnetic guiding loop 13 is made of pole shoe shape magnetic inductive block 14 and magnetic conduction bridge 15, and magnetic conduction bridge is by magnetic inductive block It connects to form an entirety；

The number of the pole shoe shape magnetic inductive block 14 is equal with the number of superconducting magnet 9, and is located at the surface of superconducting magnet 9, Squirrel-cage damping shielded layer 16 is mounted on magnetic guiding loop 13；The squirrel-cage damping shielded layer 16 is by being arranged in pole shoe shape magnetic inductive block If the dry copper amortisseur bar 17 on 14 forms；The rotor 2 by rectangular-shaped magnetic inductive block 18 and non-magnetic piece 19 along the circumferential direction Evenly distributed composition.

Using copper shield 12, magnetic guiding loop 13 and squirrel-cage damping shielded layer 16 in bimorph transducer field modulation superconducting motor Combined method inhibits influence of the armature-reaction to superconducting coil.The fundamental wave and each harmonic that armature-reaction is utilized are hindered in squirrel-cage The induced current generated on Buddhist nun's shielded layer 16 and copper shield 12, spatially generation and the reversed induced magnetic field of armature-reaction, To inhibit the influence of armature-reaction.

The copper shield 12 is mountable to the internal or external of cryostat 11 and using high conductivity materials such as aluminium System.

The center line of the pole shoe shape magnetic inductive block 14 is aligned with the center line of superconducting magnet 9.

The number of the copper amortisseur bar 17 can carry out adaptability design；The copper amortisseur bar 17 can be equidistantly evenly distributed on On pole shoe shape magnetic inductive block 14, can also unevenly it be distributed with unequal spacing；The copper amortisseur bar 17 can with partial shorts also with All it is shorted；The high conductivity materials such as aluminium substitution can be used in the copper amortisseur bar 17.

The number N of teeth t of the external stator 1, the magnetic inductive block number Nr in rotor 2, the pole shoe shape magnetic inductive block 14 in magnetic guiding loop 13 Number Np can need to design according to application, but external stator number N of teeth t must make armature winding 6 constitute Ps to the fractional-slot of pole concentrate around Group；Moreover, on the number Nr and magnetic guiding loop of the number of pole-pairs Ps of armature winding, rotor magnetic inductive block magnetic inductive block number Np, between three It must satisfy relationship: Nr > Ps > Np and Ps+Np/2=Nr.

Permeability magnetic material or non-magnet material manufacture can be selected in the inner stator yoke 7 and inner stator tooth 8.