CN109586441A - A kind of acting type motor rotor constructions such as air-gap field - Google Patents

A kind of acting type motor rotor constructions such as air-gap field Download PDF

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Publication number
CN109586441A
CN109586441A CN201811423486.4A CN201811423486A CN109586441A CN 109586441 A CN109586441 A CN 109586441A CN 201811423486 A CN201811423486 A CN 201811423486A CN 109586441 A CN109586441 A CN 109586441A
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China
Prior art keywords
waveform
rotor core
slot
motor
air
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CN201811423486.4A
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Chinese (zh)
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CN109586441B (en
Inventor
林明耀
孔永�
张旭
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Southeast University
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Southeast University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

The invention discloses a kind of acting type motor rotor constructions such as air-gap field, and including central rotating shaft and the rotor core being sheathed on central rotating shaft, rotor core surface is equipped with the equivalent slot of P group, and multiple magnetic poles are equipped with inside rotor core, and P is the number of magnetic pole.The present invention gives the general formulas of equivalent slot span, are applicable to various types motor, versatile；The present invention reduces processing cost without processing to permanent magnet；The present invention reduces the torque pulsation of motor, motor operation is more steady, and noise has obtained effective control by opening up multiple equivalent slots on rotor core surface；The equivalent slot on rotor core surface can reduce the harmonic content of air gap flux density, to reduce the eddy-current loss of motor, improve the operational efficiency of motor, reduce the temperature rise of motor.

Description

A kind of acting type motor rotor constructions such as air-gap field
Technical field
The present invention relates to magneto fields, more particularly to a kind of acting type motor rotor construction such as air-gap field.
Background technique
Magneto has been obtained for widely applying in modern industrial production, and high power density and high torque density are them Remarkable advantage, but due to the introducing of a large amount of permanent magnets, generated cogging torque will affect the stationarity of output torque, great Liang Xie The presence of wave can generate eddy-current loss on rotor surface, reduce the efficiency of motor, and temperature rise caused by loss can make forever Magnet generates demagnetization risk, and the stability of motor operation is on the hazard.
In order to reduce the cogging torque of motor, researcher proposes stator tooth, permanent magnet surfaces or rotor core exterior surface The way of face fluting, but usually slotting position is random, it can not without the regularity that can be summarized for single type motor Extend to other motors, poor universality.The method of permanent magnet segmentation can reduce the eddy-current loss of motor, but at permanent magnet processing Reason is difficult, and additional increased processing step inevitably results in the rising of processing cost.The air gap for increasing motor can reduce tooth socket Torque and eddy-current loss, but biggish air gap can make Operating Point of Permanent Magnet reduce, and required armature supply increases, copper wastage liter Height, efficiency and power output will receive influence, under the application background for pursuing low cost, high efficiency electric now and be not suitable for.
Summary of the invention
Goal of the invention: it the object of the present invention is to provide a kind of acting type motor rotor construction such as air-gap field, is able to solve existing There is the problem of poor universality present in technology, at high cost, low efficiency.
Technical solution: to reach this purpose, the invention adopts the following technical scheme:
The acting type motor rotor construction such as air-gap field of the present invention, including central rotating shaft and be sheathed on central rotating shaft Rotor core, rotor core surface is equipped with the equivalent slot of P group, equipped with P magnetic pole, the depth of i-th of equivalent slot inside rotor core Degree h meets 0.5mm≤h≤(lyoke/ 5), lyokeThe distance between central rotating shaft is arrived for rotor core surface, i-th equivalent slot Span αi=(2 βi)/P, i=(j+1)/2, βiIt is j-th of intersection point of first waveform and the second waveform between+1 intersection point of jth Span angle, wherein first waveform and the second waveform meet the following conditions:
First waveform is the overlaid waveforms of multiple sine waves, shown in the expression formula of first waveform such as formula (1):
In formula (1), f1It is the reference frequency of first waveform, AkBe frequency be kf1Sinusoidal waveform amplitude, x is angle, 0 °≤x≤180 °, 5≤N；
Second waveform is triangular wave, the amplitude A of the second waveformk2=mAk, m >=1, the frequency f of the second waveform2=N f1。
Further, the inside of the rotor core is equipped with P through slot, set in each through slot there are two permanent magnet.
Further, axisymmetrical of the through slot itself about central rotating shaft, all through slots are also about the axis pair of central rotating shaft Claim.
Further, the step groove for fixed permanent magnet is provided on the through slot.
Further, the rotor core is overrided to form by rotor punching.
The utility model has the advantages that the invention discloses a kind of acting type motor rotor constructions such as air-gap field, and compared with prior art, tool Have it is following the utility model has the advantages that
1) the invention proposes opening up the scheme of multiple equivalent slots on rotor core surface, and equivalent slot span is given General formula is applicable to various types motor, versatile；
2) present invention reduces processing cost without processing to permanent magnet；
3) present invention reduces the torque pulsation of motor, motor fortune by opening up multiple equivalent slots on rotor core surface Row is more steady, and noise has obtained effective control；
4) the equivalent slot on rotor core surface can reduce the harmonic content of air gap flux density, to reduce the vortex of motor Loss, improves the operational efficiency of motor, reduces the temperature rise of motor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of rotor in the specific embodiment of the invention；
Fig. 2 is the partial enlarged view of Fig. 1；
Fig. 3 is the schematic diagram of first waveform and the second waveform；
Fig. 4 is the structural schematic diagram of the rotor of 4 poles in embodiment 1.
Specific embodiment
Technical solution of the present invention is further introduced With reference to embodiment.
Present embodiment discloses a kind of acting type motor rotor constructions such as air-gap field, as shown in Figure 1, including center Shaft 1 and the rotor core 2 being sheathed on central rotating shaft 1,2 surface of rotor core are equipped with the equivalent slot 3 of P group, inside rotor core 2 Equipped with P magnetic pole.Equivalent slot 3 is symmetrical about magnetic pole middle line 4.Rotor core 2 is overrided to form by rotor punching.
The depth h of i-th of equivalent slot meets 0.5mm≤h≤(lyoke/ 5), lyokeFor 2 surface of rotor core to central rotating shaft The distance between 1.The span α of i-th of equivalent sloti=(2 βi)/P, i=(j+1)/2, βiIt is the of first waveform and the second waveform J intersection point is to the span angle between+1 intersection point of jth, and Fig. 2 shows the spans of first three equivalent slot 3.Wherein, first waveform Meet the following conditions with the second waveform:
First waveform is the overlaid waveforms of multiple sine waves, shown in the expression formula of first waveform such as formula (1):
In formula (1), f1It is the reference frequency of first waveform, AkBe frequency be kf1Sinusoidal waveform amplitude, x is angle, 0 °≤x≤180 °, 5≤N；
Second waveform is triangular wave, the amplitude A of the second waveformk2=mAk, m >=1, the frequency f of the second waveform2=N f1。
The inside of rotor core 2 is equipped with P through slot 5, set in each through slot 5 there are two permanent magnet 6.Two 6 structures of permanent magnet At a magnetic pole.Axisymmetrical of the through slot 5 about central rotating shaft 1 itself, all through slots 5 also axis pair about central rotating shaft 1 Claim.The step groove 7 for fixed permanent magnet 6 is provided on through slot 5.
Embodiment 1:
Fig. 4 is the schematic diagram of 4 electrode synchronization electromotors, there is 4 magnetic poles, P=4.A system is symmetrically distributed with along magnetic pole middle line The equivalent slot of column.Fig. 3 is the schematic diagram of first waveform and the second waveform, and wherein first waveform is the sine wave for containing only reference frequency Shape, corresponding k=1, the amplitude of the second waveform are 1.1 times of waveform 1, corresponding m=1.1.The frequency of second waveform is the 5 of waveform 1 Times, corresponding N=1.Shown in Fig. 3, first waveform and the second waveform are started from scratch increase, between the 1st and the 2nd intersection point across Away from angle beta1Span angle beta between=36 °, the 3rd and the 4th intersection points2Span between=18 °, the 5th and the 6th intersection points Angle beta3=2 °, so the span α of the 1st equivalent slot1=(2 β1)/P=(2 × 36 °)/4=18 °, the span of the 2nd equivalent slot α2=(2 β2)/P=(2 × 18 °)/4=9 °, the span α of the 3rd equivalent slot3=(2 β3)/P=(2 × 2 °)/4=1 °.Due to etc. It is symmetrical along magnetic pole middle line to imitate slot distribution, so the span of the 4th equivalent slot is equal to the span of the 2nd equivalent slot, the 5th equivalent slot Span be equal to the 1st equivalent slot span.The depth h=0.5mm of equivalent slot, rotor yoke thickness lyoke=32mm meets 0.5mm≤h≤(lyoke/5).U-shaped through slot is set on the inside of equivalent slot and is embedded in permanent magnet.Rotor core laminated by rotor punching and At, and step groove is set in through slot and is used for fixed permanent magnet.

Claims (5)

1. a kind of acting type motor rotor construction such as air-gap field, it is characterised in that: including central rotating shaft (1) and be sheathed on center turn Rotor core (2) on axis (1), rotor core (2) surface are equipped with the equivalent slot of P group (3), are equipped with P magnetic inside rotor core (2) The depth h of pole, i-th of equivalent slot meets 0.5mm≤h≤(lyoke/ 5), lyokeFor rotor core (2) surface to central rotating shaft (1) The distance between, the span α of i-th of equivalent sloti=(2 βi)/P, i=(j+1)/2, βiFor the jth of first waveform and the second waveform A intersection point is to the span angle between+1 intersection point of jth, wherein first waveform and the second waveform meet the following conditions:
First waveform is the overlaid waveforms of multiple sine waves, shown in the expression formula of first waveform such as formula (1):
In formula (1), f1It is the reference frequency of first waveform, AkBe frequency be kf1Sinusoidal waveform amplitude, x is angle, 0 °≤x ≤ 180 °, 5≤N；
Second waveform is triangular wave, the amplitude A of the second waveformk2=mAk, m >=1, the frequency f of the second waveform2=N f1。
2. the acting type motor rotor construction such as air-gap field according to claim 1, it is characterised in that: the rotor core (2) inside is equipped with P through slot (5), set in each through slot (5) there are two permanent magnet (6).
3. the acting type motor rotor construction such as air-gap field according to claim 2, it is characterised in that: through slot (5) itself closes Axisymmetrical in central rotating shaft (1), all through slots (5) also axisymmetrical about central rotating shaft (1).
4. the acting type motor rotor construction such as air-gap field according to claim 1, it is characterised in that: on the through slot (5) It is provided with the step groove (7) for fixed permanent magnet (6).
5. the acting type motor rotor construction such as air-gap field according to claim 1, it is characterised in that: the rotor core (2) it is overrided to form by rotor punching.
CN201811423486.4A 2018-11-27 2018-11-27 A kind of acting type motor rotor constructions such as air-gap field Active CN109586441B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114400855A (en) * 2022-01-24 2022-04-26 沈阳工程学院 Stator and rotor dual-modular permanent magnet synchronous motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013026088A1 (en) * 2011-08-19 2013-02-28 Newsouth Innovations Pty Limited Interior permanent magnet machine
US20130147309A1 (en) * 2011-12-07 2013-06-13 GM Global Technology Operations LLC Rotor geometry for reduction of torque ripple in a wound field machine
CN206023524U (en) * 2016-07-01 2017-03-15 浙江大学 A kind of rotor and stator for reducing asynchronous machine vibration and noise
CN106712425A (en) * 2017-03-09 2017-05-24 广东志高精密机械有限公司 Permanent magnet synchronous motor for compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013026088A1 (en) * 2011-08-19 2013-02-28 Newsouth Innovations Pty Limited Interior permanent magnet machine
US20130147309A1 (en) * 2011-12-07 2013-06-13 GM Global Technology Operations LLC Rotor geometry for reduction of torque ripple in a wound field machine
CN206023524U (en) * 2016-07-01 2017-03-15 浙江大学 A kind of rotor and stator for reducing asynchronous machine vibration and noise
CN106712425A (en) * 2017-03-09 2017-05-24 广东志高精密机械有限公司 Permanent magnet synchronous motor for compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114400855A (en) * 2022-01-24 2022-04-26 沈阳工程学院 Stator and rotor dual-modular permanent magnet synchronous motor

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