CN207150384U - A kind of bimorph transducer circumferential misalignment angle electrical excitation direct current generator - Google Patents
A kind of bimorph transducer circumferential misalignment angle electrical excitation direct current generator Download PDFInfo
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- CN207150384U CN207150384U CN201720878074.4U CN201720878074U CN207150384U CN 207150384 U CN207150384 U CN 207150384U CN 201720878074 U CN201720878074 U CN 201720878074U CN 207150384 U CN207150384 U CN 207150384U
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Abstract
The utility model provides a kind of bimorph transducer circumferential misalignment angle electrical excitation direct current generator, is related to DC motor technology field.The motor includes casing, rotating shaft, stator and its winding, rotor and central excitation coil, and one layer of magnetic conductor of covering is fixed on the rotating shaft surface of casing internal, and stator includes first group and second group of salient pole stator, and rotor includes first group and second group of field spider；First group of salient pole stator is identical with first group of field spider center, and tooth alignment is placed, second group of salient pole stator and second group of field spider central coaxial, and the between cog 15 degree of mechanical angles that circumferentially stagger are placed.The utility model adds magnet exciting coil while stator circumferential misalignment between two groups of stators, fundamentally reduces torque pulsation, is avoided that the demagnetization risk of permanent magnet.
Description
Technical field
It the utility model is related to DC motor technology field, more particularly to a kind of bimorph transducer circumferential misalignment angle electrical excitation direct current
Motor.
Background technology
Switched reluctance machines due to it is simple in construction, contribute that big, speed adjusting performance is good, obtained in industrial circle increasingly wide
General application.With motor technology, Power Electronic Technique, digital control technology, control theory and sensor technology development with
Using, on the basis of switched reluctance machines, double salient-pole electric machine turns into a kind of new special motor to grow up in recent years, its
Control technology has reached its maturity, at present, in Aero-Space, track traffic, lathe, automotive electronics, household electrical appliance and industry
The fields such as process control are widely used.However, switched reluctance machines have its weak point：Torque pulsation and big noise
It is two big factors when limiting this motor application.Torque pulsation is i.e. in a commutating period of motor, the maximum of output torque
Value has big difference with minimum value, causes motor oscillating, and when motor is away from design point, torque pulsation embodiment is more obvious, especially
Higher industry is required to motor output torque in electric car, weaving etc..The reason for causing torque pulsation mainly has two：One
Being the special double-salient-pole structures shape of motor necessarily has larger torque pulsation, especially when in rotor aligned position, this
When magnetic resistance it is minimum, magnetic linkage saturation, phase torque output is minimum；Two be due to that motor application is needing what power inverter frequently switched on
Among running environment, i.e., it is the complicated voltage harmonic component that can be produced in addition to fundamental wave frequently switching on, will also result in motor
Pulsation.
Utility model content
The technical problems to be solved in the utility model is to be directed to above-mentioned the deficiencies in the prior art, there is provided a kind of bimorph transducer is circumferential
Error angle electrical excitation direct current generator, is both easy to fabricate, and can make the less torque ripple of motor again, so as to have high electric efficiency
And power density, while also can effectively lift the antijamming capability of direct current generator.
In order to solve the above technical problems, technical solution adopted in the utility model is：A kind of bimorph transducer circumferential misalignment angle
Electrical excitation direct current generator, including casing, rotating shaft, stator and its winding, rotor and central excitation coil；Casing be provided with drive end bearing bracket and
Rear end cap, the both ends of casing are respectively arranged on, and the circular hole passed through for rotating shaft is equipped with the center of drive end bearing bracket and rear end cap；Machine
One layer of magnetic conductor of covering is fixed on rotating shaft surface inside shell, and one section of the centre of magnetic conductor is outstanding, makes the axial section of magnetic conductor
To be flat cross；Stator includes first group of salient pole stator and second group of salient pole stator, is fixed at the inwall at casing both ends respectively
On, two groups of salient pole stators are equipped with corresponding threephase stator winding；Rotor includes first group of field spider and second group of salient pole turns
Son, is respectively arranged on the both ends of casing internal rotating shaft, and is fixed on the outside of magnetic conductor；First group of salient pole stator and first group of salient pole turn
Subcenter is identical, and both teeth align placement, second group of salient pole stator and second group of field spider central coaxial, both teeth
Between circumferentially stagger 15 degree of mechanical angles place；Central excitation coil is located between first group of field spider and second group of field spider
The outside of magnetic conductor intermediate ledge, and be fixed on casing；Between first group of salient pole stator and first group of field spider,
There is air gap between two groups of salient pole stators and second group of field spider.
Preferably, two groups of salient pole stators form by silicon steel plate stacking.
It is using beneficial effect caused by above-mentioned technical proposal：A kind of bimorph transducer provided by the utility model is circumferential wrong
Parallactic angle electrical excitation direct current generator, magnet exciting coil is added between two groups of stators while stator circumferential misalignment, by by two groups
Stator salient poles stagger the mode of certain mechanical angle in the circumferential, fundamentally reduce torque pulsation, the advantage of magnet exciting coil is
The demagnetization risk of permanent magnet is avoided, can be used under more rugged environment, so as to improve the reliability of motor, and
Improve torque and the specified control range of rotating speed.Two groups of stators are formed by silicon steel plate stacking, are not only alleviated the weight of motor, are subtracted
The small rotary inertia of motor, and the complexity of motor control, but also torque principle of stacking is based on, both sides winding produces respectively
Raw torque is overlapped mutually so that when the torque that one rotor pole of electrical excitation direct current generator is subject to does not decay to minimum also, separately
One rotor pole has been subjected to the torque with compensating action, and both are overlapped mutually, and not only synthesizes torque increase, and motor output turns
Square pulsation also significantly reduces.A kind of bimorph transducer circumferential misalignment angle electrical excitation direct current generator provided by the utility model both facilitated and added
Work manufactures, and can make the less torque ripple of motor again, so as to improve electric efficiency and power density.
Brief description of the drawings
Fig. 1 is the bimorph transducer circumferential misalignment angle electrical excitation direct current generator axial slices 2D knots that the utility model embodiment provides
Structure schematic diagram；
Fig. 2 is the bimorph transducer circumferential misalignment angle electrical excitation direct-current motor shell inside 3D knots that the utility model embodiment provides
Structure schematic diagram；
Fig. 3 is that the spindle portion for the bimorph transducer circumferential misalignment angle electrical excitation direct current generator that the utility model embodiment provides shows
It is intended to；
Fig. 4 is the stator circumferential misalignment angle schematic diagram that the utility model embodiment provides；
Two groups of stator winding inductance curve figures when Fig. 5 is the stator circumferential misalignment that the utility model embodiment provides；
Fig. 6 is that the bimorph transducer circumferential misalignment angle electrical excitation direct current generator magnetic flux that the utility model embodiment provides moves towards signal
Figure；
Fig. 7 is the bimorph transducer circumferential misalignment angle electrical excitation DC MOTOR CONTROL schematic diagram that the utility model embodiment provides；
Fig. 8 is the bimorph transducer circumferential misalignment angle electrical excitation direct current motor drive circuit signal that the utility model embodiment provides
Figure；
Fig. 9 is the RBF neural test sample flow chart that the utility model embodiment provides；
Figure 10 is that the RBF neural that the utility model embodiment provides trains schematic diagram.
In figure：1st, casing；2nd, rotating shaft；3rd, central excitation coil；4th, drive end bearing bracket；5th, rear end cap；6th, magnetic conductor；7th, first group
Salient pole stator；8th, second group of salient pole stator；9th, first group of field spider；10th, second group of field spider.
Embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is used to illustrate the utility model, but is not limited to the scope of the utility model.
The present embodiment provides a kind of bimorph transducer circumferential misalignment angle electrical excitation direct current generator, and its object is to provide a kind of both sides
Just with processing and manufacturing, the less torque ripple of motor can be made again, so as to which the bimorph transducer with high electric efficiency and power density is circumferential
Error angle electrical excitation DC motor structure, while also effectively lift the antijamming capability of this direct current generator.
Bimorph transducer circumferential misalignment angle electrical excitation direct current generator, including casing 1, rotating shaft 2, stator and its winding, rotor and in
Entreat excitation coil 3.The two-dimensional structure of its axial slices is respectively arranged on as shown in figure 1, casing 1 is provided with drive end bearing bracket 4 and rear end cap 5
The both ends of casing 1, and the circular hole passed through for rotating shaft 2 is equipped with the center of drive end bearing bracket 4 and rear end cap 5.Three inside casing 1
Stereochemical structure is tieed up as shown in Fig. 2 one layer of magnetic conductor 6 of covering is fixed on the surface of rotating shaft 2, one section of the centre of magnetic conductor 6 is outstanding, prolongs
Extend between first group of field spider and second group of field spider, the axial section for making magnetic conductor 6 is flat cross.Stator includes the
One group of salient pole stator 7 and second group of salient pole stator 8, are fixed on the inwall at the both ends of casing 1 respectively, and two groups of salient pole stators are all provided with
There is corresponding threephase stator winding.Rotor includes first group of field spider 9 and second group of field spider 10, is respectively arranged on casing 1
The both ends of internal rotating shaft, and it is fixed on the outside of magnetic conductor 6.Central excitation coil 3 is convex located at first group of field spider 9 and second group
The outside of the intermediate ledge of magnetic conductor 6 between pole rotor 10, and be fixed on casing 1.Rotating shaft 2, magnetic conductor 6, rotor and
The structure of central excitation coil 3 is as shown in Figure 3.Between first group of salient pole stator 7 and first group of field spider 9, second group of salient pole
There is air gap between stator 8 and second group of field spider 10.Two groups of salient pole stators form by silicon steel plate stacking.First group of salient pole
Stator 7 is identical with first group of center of field spider 9, and both teeth align placement, second group of salient pole stator 8 and second group of salient pole
The central coaxial of rotor 10, circumferentially stagger 15 degree of mechanical angles of both between cog are placed, as shown in figure 4, A1, A2, A3, B1, B2, B3,
C1, C2, C3 are respectively the three-phase windings of first set stator winding, and A11, A21, A31, B11, B21, B31, C11, C21, C31 divide
Not Wei second set of stator winding three-phase windings.II region and IV region in inductance curve as shown in Figure 5, are detected respectively
Two group rotors correspond to the position of stator winding, when the salient pole of first group of salient pole stator aligns with the salient pole of first group of field spider,
When i.e. inductance is begun to decline, the salient pole of second group of salient pole stator and the salient pole position of second group of field spider just reach on inductance
The position risen, as shown in Fig. 2 when C2, C21 are simultaneously to during conducting, C21 reaches the position of salient pole alignment first, is first turned off tooth
C21 power supply, turn on B11.So conducting, rotor, can effectively less teeth groove according to minimum magnetic flux principle rotate counterclockwise
Torque, so as to reduce torque pulsation.Fig. 6 is the magnetic flux path schematic diagram of the present embodiment motor, and magnetic flux is by first group of stator core
Through rotor core, it is unshakable in one's determination through on the other side second that the permeability magnetic material through being covered on machine shaft is transmitted to the second group rotor
Group stator core, then first group of stator core is passed back by motor case and forms closed magnetic circuit.
Due to the non-linear and switch property of circuit, magnetic circuit so that description bimorph transducer circumferential misalignment angle electrical excitation direct current generator
Equation group in a basic balance be actually difficult to calculate, but necessary letter can be carried out according to carrying out practically state and research purpose
Change, therefore the method for solving of linear model, boresight shift and nonlinear model can be used.Linear model is advantageous to double fixed
The qualitative analysis of sub- circumferential misalignment angle electrical excitation direct current generator, understand the physical state of its operation, internal each physical quantity it is basic
Feature and correlation；Boresight shift has certain computational accuracy, beneficial to analysis and design control strategy.
To realize the purpose of the torque of regulation motor, two groups of stator winding are independently controlled, by detecting respectively
Rotor angle is calculated with the electric current and magnetic linkage for defining both sides stator winding, reaches both sides winding independent commutation and any time electricity
Machine both sides winding has the purpose for simultaneously turning on phase, and caused torque is overlapped mutually, and reduces while electromagnetic torque increase
Torque pulsation.The control method that the utility model uses for, using based on neutral net orientation optimization position control by the way of,
In the case that the voltage that is added on winding is certain, pass through the conduction angle changed with the main switch of windings in seriesonWith shut-off angle
θoff, control principle is as shown in fig. 7, specific method comprises the following steps.
Step 1：Single set asymmetrical three-phase half-bridge drive circuit is subjected to parallel connection, double set drive circuits is formed, is respectively used to
Two sets of stator winding of drive control；As shown in figure 8, wherein WindingA, WindingB, WindingC and WindingA1,
WindingB1, WindingC1 are respectively the inductance coil of two sets of stator winding.
Step 2：Power network fills by energy-storage capacitor C1 and C2 of the rectification circuit into asymmetrical three-phase half-bridge drive circuit
Electricity, two sets of asymmetrical three-phase half-bridge drive circuits are powered respectively；
Step 3：Installation site sensor is distinguished on two rotors, and two position sensor signals are respectively connecting to
In two sets of position capture circuits, the live signal of two groups of positions is handled by central processing unit, is determined in two sets of drive circuits
IGBT conducting phase sequence, so as to control the power-up sequence of two groups of stator winding；
Step 4：Test sample is carried out, angle θ is held on after initializationonIt is constant, to turning off angle θoffOptimize search,
Accurate optimal shut-off angle is obtained, as shown in figure 9, specific method is：
Step 4.1：Initialize the number C of step delta θ reindexingsvFor 0, setting speed and torque；By formula (18), (19)
Initialize θonAnd θoff；
Wherein, θmIt is typically corresponding with motor speed for the rotor angle where first peak value of winding current curve,
It can be obtained by testing；LnaFor the inductance size of rotor and laundry at the unjustified position of two salient poles；N is motor speed, single
Position is rpm/min, and N=9.55w, w are rotor velocity, and unit is rad/s；VdcTo be added in the DC voltage on stator winding；
IrefFor reference current；
Wherein, RaAnd RuIt is the inverse of inductance and non-alignment inductance value of aliging respectively, Rua=Ru-Ra, α=Ra/Rua；θaFor
Rotor alignment inductance angle；X is a constant, is generally existedWithBetween；
Step 4.2：After being operated in after system on stable rotating speed, present current value I is obtained0；
Step 4.3：By θoffReduce by a step delta θ, Δ θ is determined according to search convergence rate and search precision；Tool
During body is implemented, step delta θ very littles, its specific value is further determined that according to search convergence rate and search precision；
Step 4.4：After being operated in after system on stable rotating speed, compare present current value I1After last system stabilization
Current value I0Size；If I1More than I0, then step 4.5 is directly performed；Otherwise, change Δ θ symbol, and record Δ θ and change
Become the number C of symbolsv, perform step 4.5；
Step 4.5：Judge the number C of Δ θ reindexingsvWhether 2 are equal to；If so, then illustrate that current minimum is just being worked as
Near preceding current value, and optimal shut-off angle θoffIt can reach in the range of 2-3 Δ θ near current shut-off angle, then exit and searched for
Journey, current value I now1Minimum current value as under the rotating speed of setting and torque, θ nowoffFor accurate optimal pass
The angle of rupture, perform step 5；If it is not, then make I1=I0, return to step 4.3, continue to reduce θoff；
Step 5：Training RBF Neural Network, as shown in Figure 10, specific method is：
Step 5.1：By the rotating speed w of forecast sample collection0With torque T0Input in RBF neural, output shut-off angle
Step 5.2：The accurate optimal shut-off angle θ obtained during by step 4 test sampleoffIt is input to RBF neural
In, by the shut-off angle of network outputWith accurate optimal shut-off angle θoffCompare, obtain error delta θoff；
Step 5.3：Error in judgement Δ θoffAbsolute value whether be less than default error threshold, if so, then training terminates, obtain
Have to one and calculate optimal shut-off angle θoffThe RBF neural of ability, perform step 6；If it is not, then use error delta θoffBy
The weights of each node of modified weight algorithm modified RBF Neural Networks, return to step 5.1；In the present embodiment, default error threshold is
0.1, in specific implementation, it can be changed in good time by concrete condition；
Step 6：The rotating speed w obtained in real time and torque T are input in the RBF neural after training, obtain optimal pass
The angle of rupture, phase change logic signal is exported by central processing unit, drive circuit is controlled, realize the independent control of two groups of stator winding
System.
A kind of bimorph transducer circumferential misalignment angle electrical excitation direct current generator and its control method that the present embodiment provides, in stator week
To between two groups of stators adding magnet exciting coil while dislocation, by the way that two groups of stator salient poles are staggered certain machinery in the circumferential
The mode at angle, fundamentally reduces torque pulsation, and the advantage of magnet exciting coil in avoiding the demagnetization risk of permanent magnet, Ke Yi
More used under rugged environment, so as to improve the reliability of motor, and improve torque and the specified control range of rotating speed.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in previous embodiment, either to which part or all technical characteristic
Carry out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from the utility model right and want
Seek limited range.
Claims (2)
- A kind of 1. bimorph transducer circumferential misalignment angle electrical excitation direct current generator, it is characterised in that：Including casing (1), rotating shaft (2), stator And its winding, rotor and central excitation coil (3)；Casing (1) is provided with drive end bearing bracket (4) and rear end cap (5), is respectively arranged on casing (1) both ends, and the circular hole passed through for rotating shaft (2) is equipped with the center of drive end bearing bracket (4) and rear end cap (5)；In casing (1) One layer of magnetic conductor (6) of covering is fixed on rotating shaft (2) surface in portion, and one section of the centre of magnetic conductor (6) is outstanding, makes the axle of magnetic conductor Section is flat cross；Stator includes first group of salient pole stator (7) and second group of salient pole stator (8), is fixed at casing respectively (1) on the inwall at both ends, two groups of salient pole stators are equipped with corresponding threephase stator winding；Rotor includes first group of field spider (9) both ends of casing internal rotating shaft and second group of field spider (10), are respectively arranged on, and are fixed on the outside of magnetic conductor (6)；First Salient pole stator (7) is identical with the first field spider (9) center, and both teeth align placement, the second salient pole stator (8) and second Field spider (10) central coaxial, circumferentially stagger 15 degree of mechanical angles of both between cog are placed；Central excitation coil (3) is located at first The outside of magnetic conductor (6) intermediate ledge between group field spider (9) and second group of field spider (10), and it is fixed on machine On shell (1)；Between first salient pole stator (7) and the first field spider (9), the second salient pole stator (8) and the second field spider (10) there is air gap between.
- 2. bimorph transducer circumferential misalignment angle electrical excitation direct current generator according to claim 1, it is characterised in that：Described first is convex Pole stator (7) and the second salient pole stator (8) form by silicon steel plate stacking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720878074.4U CN207150384U (en) | 2017-07-19 | 2017-07-19 | A kind of bimorph transducer circumferential misalignment angle electrical excitation direct current generator |
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| CN201720878074.4U CN207150384U (en) | 2017-07-19 | 2017-07-19 | A kind of bimorph transducer circumferential misalignment angle electrical excitation direct current generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154716A (en) * | 2017-07-19 | 2017-09-12 | 沈阳工业大学 | Bimorph transducer circumferential misalignment angle electrical excitation direct current generator and its control method |
| CN114640232A (en) * | 2022-03-29 | 2022-06-17 | 中国人民解放军国防科技大学 | Side-by-side double-stator staggered-tooth permanent magnet vernier motor |
-
2017
- 2017-07-19 CN CN201720878074.4U patent/CN207150384U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154716A (en) * | 2017-07-19 | 2017-09-12 | 沈阳工业大学 | Bimorph transducer circumferential misalignment angle electrical excitation direct current generator and its control method |
| CN107154716B (en) * | 2017-07-19 | 2023-11-28 | 沈阳工业大学 | Control method of double-stator circumferential dislocation angle electric excitation direct current motor |
| CN114640232A (en) * | 2022-03-29 | 2022-06-17 | 中国人民解放军国防科技大学 | Side-by-side double-stator staggered-tooth permanent magnet vernier motor |
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Effective date of registration: 20211101 Address after: 110000 No. 9, Zhongde street, Shenyang Economic and Technological Development Zone, Liaoning Province Patentee after: SHENYANG WELDING ROBOT Co.,Ltd. Address before: 110870 No. 111 Shenyang West Road, Shenyang economic and Technological Development Zone, Liaoning Patentee before: SHENYANG University OF TECHNOLOGY |
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| TR01 | Transfer of patent right |