CN109302039A - Permanent magnetism assists Reluctance synchronous linear electric generator and its control method - Google Patents
Permanent magnetism assists Reluctance synchronous linear electric generator and its control method Download PDFInfo
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- CN109302039A CN109302039A CN201811238078.1A CN201811238078A CN109302039A CN 109302039 A CN109302039 A CN 109302039A CN 201811238078 A CN201811238078 A CN 201811238078A CN 109302039 A CN109302039 A CN 109302039A
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- primary
- magnetic
- synchronous linear
- axis
- electric generator
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/05—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/20—Estimation of torque
Abstract
The embodiment of the invention discloses a kind of permanent magnetism auxiliary Reluctance synchronous linear electric generator and its control methods, the synchronous linear generator includes primary and secondary, multiple primary slots are offered in the primary, coil is equipped in primary slot, the secondary is made of multiple with primary corresponding secondary units, successively equidistantly it is equipped with from top to bottom multiple coaxial every magnetic magnetic bridge in the secondary units, each of the secondary units is equipped with a permanent magnet at the corresponding axis of magnetic magnetic bridge；It is identical with the permanent magnet magnetic extreme direction in secondary units；The permanent magnet pole of two adjacent secondary units is contrary.The embodiment of the present invention goes to weaken longitudinal end effect using assist tooth and skewed slot, reduces force oscillation, and then prevents that air-gap field is distorted and torque ripple is caused to deteriorate.
Description
Technical field
The present invention relates to linear electric generator technical field more particularly to a kind of permanent magnetism auxiliary Reluctance synchronous linear electric generator and
Its control method.
Background technique
With the development of the social economy, the generation of electric energy is just becoming increasingly prevalent with use.Wherein electric energy can be by fire
The modes such as power power generation, hydroelectric generation, solar power generation and wind-power electricity generation obtain, and occupy main status in Chinese thermal power generation.But
It is that the air pollutants that thermal power generation generates just make natural environment and human health face serious pressure.And wave energy conduct
A kind of new energy, because it is with high-energy density, global reserves, broad application prospect, good predictability abundant, just
It receives more and more attention.Direct-drive type wave energy electricity generation system can directly be turned the linear motion of wave using linear motor
It changes electric energy into, saves intermediate gearing.In addition to this, compared to other Wave energy generating systems, direct-drive type wave-activated power generation system
System needs less offshore maintenance.Therefore, direct-drive type wave energy electricity generation system is considered as most flexible offshore type wave energy hair
One of electric installation has a good application prospect.
For direct-drive type system, linear motor can use several different structures.In these structures, permanent magnetism is auxiliary
Help reluctance-synchronous machine (PM-assisted reluctance synchronous machine, abbreviation PMRSM) that there is power
Big, the high-efficient feature of density.But longitudinal end effect can be generated, it is distorted air-gap field, deteriorates torque ripple.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of permanent magnetism auxiliary Reluctance synchronous linear electric generator
And its control method, so as to which the influence of longitudinal end effect can be weakened.
In order to solve the above-mentioned technical problem, the embodiment of the present invention proposes a kind of permanent magnetism auxiliary Reluctance synchronous linear generating
Machine, including primary and secondary offer multiple primary slots in the primary, coil are equipped in primary slot, the secondary is by more
It is a to be formed with primary corresponding secondary units, it is successively equidistantly equipped with from top to bottom in the secondary units multiple coaxial every magnetic magnetic
Bridge, each of the secondary units are equipped with a permanent magnet at the corresponding axis of magnetic magnetic bridge；In same secondary units forever
Magnet poles direction is identical；The permanent magnet pole of two adjacent secondary units is contrary.
Further, the d-axis of the primary and secondary d-axis are at a distance of 45 degree.
Further, the left and right ends of the primary are respectively equipped with left redundant tooth, right redundant tooth；The bottom width of the primary slot
Spend wsb=1.1wrt；Primary facewidth wpt=1.2wrt；Primary tooth pitch ptp=1.5wrt；Left redundant tooth wlt=3.5wrt；wrtFor
Right redundant tooth；Every magnetic magnetic bridge height hb=0.2wrt；Every magnetic magnetic bridge width wb=0.5wrt。
Further, skewed slot is equipped in the primary.
Correspondingly, the embodiment of the invention also provides a kind of permanent magnetism auxiliary Reluctance synchronous linear electric generator control method,
Applied in above-mentioned permanent magnetism auxiliary Reluctance synchronous linear electric generator, comprising: building permanent magnetism assists Reluctance synchronous linear electric generator
Mathematical model；Phase current is obtained by FEM data；Direct-axis current, quadrature axis current is calculated according to phase current；
Corresponding d-axis magnetic linkage, quadrature axis magnetic linkage is calculated by mathematical model；According to direct-axis current, quadrature axis current, d-axis magnetic linkage, hand over
Axis flux linkage calculation obtains torque equation, and is controlled according to torque equation the synchronous linear generator speed, wherein turns
Moment equation is as follows:
P is number of pole-pairs, λd、λq、idAnd iqIt is d-axis magnetic linkage, quadrature axis magnetic linkage, direct-axis current and quadrature axis current, λ respectivelypm
It is permanent magnet flux linkage.
The embodiment of the present invention is by proposing that a kind of permanent magnetism assists Reluctance synchronous linear electric generator and its control method, use auxiliary
It helps tooth and skewed slot to go to weaken longitudinal end effect, reduces force oscillation, and then prevent that air-gap field is distorted and leads to torque
Fluctuation deteriorates.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the permanent magnetism auxiliary Reluctance synchronous linear electric generator of the embodiment of the present invention.
Fig. 2 is the schematic diagram of the d-axis magnetic circuit of the embodiment of the present invention.
Fig. 3 is the schematic diagram of the quadrature axis magnetic circuit of the embodiment of the present invention.
Fig. 4 is the primary structural schematic diagram of the embodiment of the present invention.
Fig. 5 is the flow chart of the control method of the permanent magnetism auxiliary Reluctance synchronous linear electric generator of the embodiment of the present invention.
Fig. 6 is the circuit diagram of the power generation circuit of the permanent magnetism auxiliary Reluctance synchronous linear electric generator of the embodiment of the present invention.
Fig. 7 is the change curve schematic diagram of the unloaded magnetic linkage of the embodiment of the present invention.
Fig. 8 is the change curve schematic diagram of the floating voltage of the embodiment of the present invention.
Fig. 9 is the change curve schematic diagram of the A phase voltage harmonic wave of the embodiment of the present invention.
Drawing reference numeral explanation
Primary 10
Coil 11
Secondary 20
Every magnetic magnetic bridge 21
Permanent magnet 22.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
It mutually combines, invention is further described in detail in the following with reference to the drawings and specific embodiments.
If directional instruction (such as up, down, left, right, before and after ...) is only used for explaining at certain in the embodiment of the present invention
Relative positional relationship, motion conditions etc. under one particular pose (as shown in the picture) between each component, if the particular pose is sent out
When raw change, then directionality instruction also correspondingly changes correspondingly.
If in addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as
Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.
Fig. 1 is please referred to, the permanent magnetism auxiliary Reluctance synchronous linear electric generator of the embodiment of the present invention includes primary 10 and secondary 20.
Offer multiple primary slots in primary 10, be equipped with coil 11 in primary slot, described secondary 20 by it is multiple with it is primary
10 corresponding secondary units compositions, be successively equidistantly equipped in the secondary units from top to bottom it is multiple coaxial every magnetic magnetic bridge 21,
The each of the secondary units is equipped with a permanent magnet 22 at the corresponding axis of magnetic magnetic bridge 21；In same secondary units forever
22 pole orientation of magnet is identical；22 pole orientation of permanent magnet of two adjacent secondary units is opposite.Due to the magnetic of permanent magnet 22
Conductance is approximate with air, so permanent magnet 22 only influences quadrature axis magnetic circuit.Under the booster action of permanent magnet 22, the present invention is implemented
Example can obtain more torques.Fig. 2 and Fig. 3 respectively shows straight (d) axis of the embodiment of the present invention and hands over (q) axis magnetic circuit, every
Magnetic magnetic bridge 21 increases q axis magnetic resistance, that is, reduces q axle inductance, and then increase torque.
As an implementation, the d-axis of primary 10 and the d-axis of secondary 20 are at a distance of 45 degree.The embodiment of the present invention in order to
Possess torque capacity (not considering that magnetic circuit is saturated), the d-axis (d axis) of primary 10 and the d-axis (d axis) of secondary 20 are always at a distance of 45
Degree.
Referring to figure 4., as an implementation, primary 10 left and right ends are respectively equipped with left redundant tooth, right redundant tooth；Institute
State the bottom width degree w of primary slotsb=1.1wrt；The facewidth w of primary 10pt=1.2wrt；The tooth pitch p of primary 10tp=1.5wrt；Inside left
Help tooth wlt=3.5wrt；wrtFor right redundant tooth；Every 21 height h of magnetic magnetic bridgeb=0.2wrt；Every 21 width w of magnetic magnetic bridgeb=0.5wrt。
The asymmetry of primary 10 and secondary 20 causes inconsistent in the auxiliary tooth width optimization process of left and right.
As an implementation, skewed slot is equipped in described primary 10.The embodiment of the present invention is gone using assist tooth and skewed slot
Weaken longitudinal end effect, reduces force oscillation, and then prevent that air-gap field is distorted and torque ripple is caused to deteriorate.
Referring to figure 5., the control method of the permanent magnetism auxiliary Reluctance synchronous linear electric generator of the embodiment of the present invention, is applied to upper
In the permanent magnetism auxiliary Reluctance synchronous linear electric generator stated, comprising: the mathematical modulo of building permanent magnetism auxiliary Reluctance synchronous linear electric generator
Type；Phase current is obtained by FEM data；Direct-axis current, quadrature axis current is calculated according to phase current；Pass through mathematics
Corresponding d-axis magnetic linkage, quadrature axis magnetic linkage is calculated in model；According to direct-axis current, quadrature axis current, d-axis magnetic linkage, quadrature axis magnetic linkage meter
Calculation obtains torque equation, and is controlled according to torque equation the synchronous linear generator speed, wherein torque equation is such as
Shown in lower:
P is number of pole-pairs, λd、λq、idAnd iqIt is d-axis magnetic linkage, quadrature axis magnetic linkage, direct-axis current, quadrature axis current, λ respectivelypmIt is
Permanent magnet flux linkage.
As an implementation, the voltage regulation factor f of the synchronous linear generatorvr, internal power factor fipAnd output
Voltage fluctuation rovAre as follows:
Wherein, UmAnd ImOutput voltage of the respectively described synchronous linear generator in peak power output and output electricity
Stream；Uo、UA-UC、IA-IC、P、Umax、UminAnd UavgBe respectively idle voltage output, three-phase voltage, three-phase current, output power,
Maximum value, minimum value and the average value of output voltage.PmAnd UmThere are similar linear change rate, while I between vmApproximation is protected
It holds constant.Therefore the embodiment of the present invention is suitble to constant current load.
The threephase armature winding of the embodiment of the present invention is connect (see Fig. 6) with external circuit, available PMRSLG power generation circuit.
In Fig. 6, LA, LB, LC, D1-D6, R, I and U respectively represent three-phase windings, diode, load resistance, load current and load
Voltage.
Fig. 7 show the unloaded magnetic linkage (v=9m/s) of the permanent magnetism auxiliary Reluctance synchronous linear electric generator of the embodiment of the present invention.
It can be seen from the figure that A phase magnetic linkage amplitude is the maximum in three-phase magnetic linkage amplitude, this is because B phase and C phase be used as side end mutually by
To the influence of longitudinal end effect.Fig. 8 show the zero load of the permanent magnetism auxiliary Reluctance synchronous linear electric generator of the embodiment of the present invention
Voltage (v=9m/s).By Fig. 8, available A phase floating voltage harmonic component is shown in Fig. 9.From fig. 9, it can be seen that 3 subharmonic are
A phase voltage major harmonic component has more apparent negative interaction to A phase voltage.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention are defined by the appended claims and their equivalents.
Claims (6)
1. a kind of permanent magnetism assists Reluctance synchronous linear electric generator, including primary and secondary, multiple primary are offered in the primary
Slot, is equipped with coil in primary slot, described secondary to be made of multiple secondary units corresponding with primary, which is characterized in that described
Successively equidistantly be equipped with from top to bottom in secondary units it is multiple coaxial every magnetic magnetic bridge, the secondary units it is each every magnetic magnetic bridge pair
A permanent magnet is equipped at the axis answered；It is identical with the permanent magnet magnetic extreme direction in secondary units；Two adjacent secondary
The permanent magnet pole of unit is contrary.
2. permanent magnetism as described in claim 1 assists Reluctance synchronous linear electric generator, which is characterized in that the d-axis of primary and
Secondary d-axis is at a distance of 45 degree.
3. permanent magnetism as described in claim 1 assists Reluctance synchronous linear electric generator, which is characterized in that the left and right two of the primary
End is respectively equipped with left redundant tooth, right redundant tooth；The bottom width degree w of the primary slotsb=1.1wrt；Primary facewidth wpt=1.2wrt；
Primary tooth pitch ptp=1.5wrt；Left redundant tooth wlt=3.5wrt；wrtFor right redundant tooth；Every magnetic magnetic bridge height hb=0.2wrt；Every
Magnetic magnetic bridge width wb=0.5wrt。
4. permanent magnetism as described in claim 1 assists Reluctance synchronous linear electric generator, which is characterized in that be equipped in the primary oblique
Slot.
5. a kind of control method of permanent magnetism auxiliary Reluctance synchronous linear electric generator, is applied to such as any one of claim 1-4 institute
In the permanent magnetism auxiliary Reluctance synchronous linear electric generator stated characterized by comprising building permanent magnetism assists Reluctance synchronous linear generating
The mathematical model of machine；Phase current is obtained by FEM data；Direct-axis current, quadrature axis electricity is calculated according to phase current
Stream；Corresponding d-axis magnetic linkage, quadrature axis magnetic linkage is calculated by mathematical model；According to direct-axis current, quadrature axis current, d-axis magnetic
Chain, quadrature axis flux linkage calculation obtain torque equation, and are controlled according to torque equation the synchronous linear generator speed,
In, torque equation is as follows:
P is number of pole-pairs, λd、λq、idAnd iqIt is d-axis magnetic linkage, quadrature axis magnetic linkage, direct-axis current and quadrature axis current, λ respectivelypmIt is forever
Magnetic magnetic linkage.
6. the control method of permanent magnetism auxiliary Reluctance synchronous linear electric generator as claimed in claim 5, which is characterized in that described same
Walk the voltage regulation factor f of linear electric generatorvr, internal power factor fipR is fluctuated with output voltageovAre as follows:
Wherein, UmAnd ImOutput voltage of the respectively described synchronous linear generator in peak power output and output electric current；
Uo、UA-UC、IA-IC、P、Umax、UminAnd UavgIt is idle voltage output, three-phase voltage, three-phase current, output power, output respectively
Maximum value, minimum value and the average value of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811238078.1A CN109302039B (en) | 2018-10-23 | 2018-10-23 | Permanent magnetism assists Reluctance synchronous linear electric generator and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811238078.1A CN109302039B (en) | 2018-10-23 | 2018-10-23 | Permanent magnetism assists Reluctance synchronous linear electric generator and its control method |
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| CN109302039A true CN109302039A (en) | 2019-02-01 |
| CN109302039B CN109302039B (en) | 2019-08-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615515A (en) * | 2020-12-04 | 2021-04-06 | 南京航空航天大学 | Bilateral dislocation magnetic barrier permanent magnet auxiliary reluctance synchronous linear motor |
| CN112821709A (en) * | 2021-01-29 | 2021-05-18 | 同济大学 | Bilateral short primary synchronous reluctance linear motor |
| CN112953159A (en) * | 2021-04-26 | 2021-06-11 | 合肥工业大学 | Double-side permanent magnet auxiliary linear synchronous reluctance motor with high thrust density |
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Cited By (4)
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| CN112615515A (en) * | 2020-12-04 | 2021-04-06 | 南京航空航天大学 | Bilateral dislocation magnetic barrier permanent magnet auxiliary reluctance synchronous linear motor |
| CN112821709A (en) * | 2021-01-29 | 2021-05-18 | 同济大学 | Bilateral short primary synchronous reluctance linear motor |
| CN112953159A (en) * | 2021-04-26 | 2021-06-11 | 合肥工业大学 | Double-side permanent magnet auxiliary linear synchronous reluctance motor with high thrust density |
| CN112953159B (en) * | 2021-04-26 | 2022-07-12 | 合肥工业大学 | Double-side permanent magnet auxiliary linear synchronous reluctance motor with high thrust density |
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| CN109302039B (en) | 2019-08-27 |
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