CN101436793A - High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile - Google Patents

High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile Download PDF

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Publication number
CN101436793A
CN101436793A CNA2007101352614A CN200710135261A CN101436793A CN 101436793 A CN101436793 A CN 101436793A CN A2007101352614 A CNA2007101352614 A CN A2007101352614A CN 200710135261 A CN200710135261 A CN 200710135261A CN 101436793 A CN101436793 A CN 101436793A
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CN
China
Prior art keywords
stator
magnet steel
rotor
magnetic
rectangular strip
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Pending
Application number
CNA2007101352614A
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Chinese (zh)
Inventor
胡岗
林德芳
陈文英
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Hexin Electric Appliance Co Ltd Suzhou Industry Region
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Hexin Electric Appliance Co Ltd Suzhou Industry Region
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Application filed by Hexin Electric Appliance Co Ltd Suzhou Industry Region filed Critical Hexin Electric Appliance Co Ltd Suzhou Industry Region
Priority to CNA2007101352614A priority Critical patent/CN101436793A/en
Publication of CN101436793A publication Critical patent/CN101436793A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

Abstract

The invention relates to a high-power wide-speed adjustment built-in permanent magnet brush wheel-free motor for an electric automobile, which comprises a shell, and a rotor and a stator arranged in the shell. The rotor comprises a stator core and a stator winding which are fixed on the inner wall of the shell. The stator core comprises a stator yoke, a stator slot and a stator tooth. The rotor comprises a rotating shaft and a rotor core. An inner circle of the rotor core is uniformly embedded with radical magnetizing rectangular magnetic steel strips or cracked radical magnetizing rectangular steel strips along the circumferential direction. The radical magnetizing rectangular magnetic steel strips or the cracked radical magnetizing rectangular steel strips form permanent magnetic poles. An external circle of a pole shoe of a rotor is of a non-concentric arc-shaped curved surface and provided with non-uniformly symmetric radial air gaps. Magnet-shielding magnetic bridges are arranged between the magnetic poles and the high saturation of a magnetic circuit at a cross section of the magnet-shielding magnetic bridges is ensured. The radical insertion depth of the magnetic steel strips in the core, the width of an empty groove of a magnet-embedding steel groove, the angle of the empty groove of the magnet-embedding steel groove, the angle of polar arc and so on are adjusted to realize smooth operation with high efficiency, high power output, wide speed adjustment and quick response.

Description

High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile
Technical field
The present invention relates to a kind of brushless, permanently turbin generator, relate in particular to a kind of high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, belong to technical field of motors.
Background technology
The problems such as disaster hidden-trouble that the exhaust pollution of automobile, noise, fuel oil are deposited more and more cause people's attention, electric automobile become the development of automobile New Development to, wherein drive motors and drive system are the hearts of electric automobile.Driving motor of electric vehicle mainly contains induction alternating current (AC) motor and non-brush permanent-magnet DC motor.Motor speed is higher, all can not directly drive, must supply with under the most valuable situation at electric automobile energy (storage battery) by driving-chain deceleration ability drive wheels, have to part energy is consumed in the quite low driving-chain of efficient, increase volume, weight, noise and reduction reliability.Directly drive the brushless, permanently turbin generator at present, but research approach, the mode of thinking are not broken away from also on the main points that electric bicycle and battery-operated motor cycle design in development yet.
The driving of electric automobile and electric bicycle, motorcycles drives are diverse design concepts, must consider following function: efficient, wide range speed control, torque ripple, the linearity, overload capacity, response etc. fast.Non-brush permanent-magnet DC motor (BLM) has many good qualities, but the armature excitation is the rotating magnetic field of " non-circular great-jump-forward ", there is bigger torque ripple, defectives such as simultaneously there is mechanical properties in present used for electric vehicle brushless, permanently turbin generator, efficient is low, detent torque is little, overload capacity is low, poor linearity, speed adjustable range are narrow influences the steady low noise of motor and move.The brushless turbin generator of used for electric vehicle high-power permanent magnet (10KW-50KW) combination property requires higher, more is difficult to realize industrialization.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile is provided.
Purpose of the present invention is achieved through the following technical solutions:
High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, comprise stator and rotor in casing and the casing, described stator comprises stator core and the stator winding that is fixed on casing inner wall, it is characterized in that: described stator core comprises stator yoke, stator slot and stator tooth, described rotor comprises rotating shaft and rotor core, described rotor core inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel, or evenly studding with the type diametrical magnetization rectangular strip magnet steel that splits, described diametrical magnetization rectangular strip magnet steel or split type diametrical magnetization rectangular strip magnet steel and pole shoe constitute permanent magnetism magnetic pole.Pole shoe can prevent that armature reaction from causing magnet steel degaussing danger.Built-in type permanent-magnet can produce reluctance torque, is beneficial to high-speed cruising and frequent starting, realizes the even running of efficient, high output, wide range speed control, fast-response.Two magnet steel magnetic lines of force of the type that splits are close to pole shoe (magnetic pole), and converge at pole center and form a utmost point, and weak magnetism speed expansion, constant-power speed regulation, poly-magnetic and the raising effect of exerting oneself is arranged.
Further, above-mentioned high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, the cylindrical of described pole shoe is non-concentric arcs curved surface, make and form inhomogeneous symmetrical radial air gap between rotor, make motor have poly-magnetic, improve the air-gap field waveform, reduce torque ripple, suppress static and dynamic armature reaction, improve overload capacity.
Further, above-mentioned high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, be provided with every the magnetic magnetic bridge between the permanent magnetism magnetic pole that described rotor core inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel or split type diametrical magnetization rectangular strip magnet steel and pole shoe constitute, assurance is saturated every magnetic magnetic bridge section magnetic circuit height, reduce leakage field, increase useful flux, raising is exerted oneself.
Further, above-mentioned high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, the diametrical magnetization rectangular strip magnet steel that described rotor core inner periphery direction evenly studs with, magnet steel in iron core radially insertion depth do not wait, can increase permanent magnet flux, reluctance torque and output torque, reduce torque ripple, raising is exerted oneself.
Again further, above-mentioned high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, described rotor core inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel, the dead slot width of its edge magnet steel groove does not wait, can increase reluctance torque and output torque, reduce torque ripple, realize the even running of high output, wide range speed control.
Again further, above-mentioned high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, described rotor core inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel, the dead slot angle of its edge magnet steel groove is a polar arc angle difference, can increase reluctance torque and output torque, significantly reduce torque ripple, the motor integrated quality is improved, realize the even running of wide range speed control, fast-response.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
1. the present invention designs uniqueness, novel structure, is built-in structure, and production technology is simple, adopts and is bumped into the rectangular strip magnet steel, exempts from oxidation, easily processes, magnetizes, economizes material and fixing easily; Rotor surface is level and smooth, good dynamic balance, and Stability Analysis of Structures is particularly conducive to used for electric vehicle high power drive motors high-speed cruising and Fraquent start; Rotor is that saliency (salient pole rate) is remarkable, and starting characteristic is good, and overload capacity is strong, and the high power ratio is convenient to weak magnetism speed expansion and constant-power speed regulation, makes the even running of motor energy high power, wide range speed control, fast-response;
2. be inhomogeneous symmetrical radial air gap between electric machine rotor, have poly-magnetic, improve the air-gap field waveform, reduce torque ripple, suppress static and dynamic armature reaction, improve overload capacity;
3. two blocks of magnet steel of the type that splits have weak magnetism speed expansion, constant-power speed regulation, poly-magnetic and the raising effect of exerting oneself;
4. be provided with between motor pole every the magnetic magnetic bridge, reduce leakage field, increase useful flux, improve exert oneself, power-weight ratio, power to volume ratio and efficient;
5. in the motor p-m rotor, regulate magnet steel insertion depth radially in iron core, regulate the dead slot width of edge magnet steel groove and regulate the polar arc angle, increase permanent magnet flux, reluctance torque and output torque, reduce torque ripple.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1 a: built-in (diametrical magnetization rectangle magnet steel) brushless, permanently turbin generator generalized section;
Fig. 1 b: built-in (type that splits radial magnet steel) brushless, permanently turbin generator generalized section;
Fig. 1 c: built-in (the rotating pole-piece cylindrical is non-concentric arcs curved surface) brushless, permanently turbin generator generalized section;
Fig. 2: built-in type permanent-magnet rotor profiles figure;
Fig. 3: the built-in type brushless, permanently turbin generator profile that splits;
Fig. 4: the built-in type brushless, permanently turbin generator torque curve schematic diagram that splits;
Fig. 5: the built-in rectangle and the type brushless, permanently turbin generator torque-speed characteristic schematic diagram that splits;
Fig. 6: regulate the radially velocity modulation built-in permanent magnet brushless wheel motor profile of insertion depth of magnet steel in the direction of arrows;
Fig. 7: the velocity modulation built-in permanent magnet brushless wheel motor profile that magnet steel dead slot width is different;
Fig. 8: built-in type permanent-magnet rotor profiles schematic diagram;
Fig. 9 a, 9b, 9c: built-in type permanent-magnet rotor magnetic pole polar arc angle schematic diagram.
The implication of each Reference numeral sees the following form among the figure:
Embodiment
High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, comprise stator and rotor in casing and the casing, stator comprises stator core and the stator winding that is fixed on casing inner wall, casing double as stator magnetic conduction yoke, Fig. 1 a, shown in the 1b, stator core comprises stator yoke 1, stator slot 2 and stator tooth 3, rotor comprises rotating shaft 7 and rotor core 6, rotor core 6 inner periphery directions evenly stud with diametrical magnetization rectangular strip magnet steel 5a, as Fig. 1 a, or rotor core 6 inner periphery directions evenly stud with the type diametrical magnetization rectangular strip magnet steel 5b that splits, as Fig. 1 b, diametrical magnetization rectangular strip magnet steel 5a or split type diametrical magnetization rectangular strip magnet steel 5b and pole shoe 4 formation permanent magnetism magnetic poles, pole shoe 4 can prevent that armature reaction from causing magnet steel degaussing danger.
Fig. 1 b, the type that splits diametrical magnetization rectangular strip magnet steel 5b and pole shoe 4 are formed permanent magnetism magnetic pole, two blocks of magnet steel of the type that splits have weak magnetism speed expansion, constant-power speed regulation, poly-magnetic and the raising effect of exerting oneself, the magnetic flux of two radial magnet steels presses to air gap by pole shoe 4 simultaneously, increase air gap flux density effectively, motor is exerted oneself and is directly proportional with air gap flux density, exerts oneself thereby significantly improved, and has correspondingly also improved overload capacity and response fast.Fig. 3 p-m rotor iron core inner periphery direction evenly studs with the type radial magnet steel 5b that splits, except permanent magnet circuit A produces synchronous torque, the built-in type permanent-magnet rotor also has magnetic resistance loop B to produce reluctance torque, its curve as shown in Figure 4, synchronous torque C1 and reluctance torque C2 are superimposed as synthetic torque C3, and weak magnetism speed expansion and constant-power speed regulation effect are arranged.
Shown in Fig. 1 c, rotor core inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel 5a, p-m rotor pole shoe 4 cylindricals are the non-concentric arcs curved surface through optimal design, pole shoe 4 central air gaps are little, become big gradually to the both sides air gap, make and form inhomogeneous symmetrical radial air gap between rotor, make motor have poly-magnetic, improve the air-gap field waveform, make air-gap field near sinusoidal wave, reduce motor noise, torque ripple suppresses static and dynamic armature reaction, improve overload capacity, built-in type permanent-magnet can produce reluctance torque simultaneously, be beneficial to high-speed cruising and frequent starting, realize efficient, high output, wide range speed control, the even running of fast-response.
Rotor magnetic pole is made up of radially built-in or split type radial magnet steel and pole shoe, the magnetic conductive pole piece leakage field can be very big, therefore, between magnetic pole, be provided with every magnetic magnetic bridge 8, as Fig. 2, assurance is saturated every magnetic magnetic bridge section magnetic circuit height, magnetic capacity reduces, and reduces magnetic bridge punishment stream magnetic flux, reduces leakage field, increase useful flux, raising is exerted oneself.
The torque-speed characteristic of Fig. 5 velocity modulation built-in permanent magnet brushless wheel motor, curve D are built-in radial magnet steel, and curve E is the built-in type radial magnet steel that splits, and as seen, the built-in type that splits has tangible weak magnetism speed expansion and constant output characteristic.
The radially velocity modulation built-in permanent magnet brushless wheel motor section of insertion depth of magnet steel of regulating in the direction of arrows shown in Figure 6, rotor core inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel 5a, regulate magnet steel 5a insertion depth radially in iron core, can increase permanent magnet flux, reluctance torque and output torque, reduce torque ripple.
The different velocity modulation built-in permanent magnet brushless wheel motor section of magnet steel dead slot width shown in Figure 7, rotor core inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel 5a, regulates the dead slot width of magnet steel groove 9, can increase reluctance torque and output torque, reduce torque ripple, the motor integrated quality is improved.
Built-in type permanent-magnet rotor magnetic pole shown in Fig. 8, Fig. 9 a, 9b, the 9c, its polar arc angle 10, pole span 11, rotor core inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel 5a, regulate the dead slot angle of edge magnet steel groove, promptly regulate the polar arc angle 10 of every utmost point, the polar arc angle of consecutive roots is all unequal, and rationally regulating polar arc angle 10 can increase reluctance torque and output torque, significantly reduces torque ripple.Regulate polar arc angle 10 and can make torque ripple reduce 70%, the motor integrated quality is increased substantially, realize the even running of wide range speed control, fast-response.
In sum, the built-in structure of the present invention is compared with prior art surface-adhered type (magnet steel is affixed on the rotor core outer round surface), and have the following advantages: 1. production technology is simple, adopts the rectangular strip magnet steel, easily processes, magnetizes, economizes material and fixing easily; 2. rotor surface is level and smooth, good dynamic balance, and Stability Analysis of Structures helps high-speed cruising and Fraquent start; 3. rotor is typical salient-pole structure, and saliency (salient pole rate) is remarkable, and starting characteristic is good, and overload capacity is strong, is convenient to weak magnetism speed expansion and constant-power speed regulation, makes the even running of motor energy high power, wide range speed control, fast-response.
What need emphasize is, high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile of the present invention, be inhomogeneous symmetrical radial air gap between electric machine rotor, have poly-magnetic, improve the air-gap field waveform, reduce torque ripple, suppress static and dynamic armature reaction, improve overload capacity.Two blocks of magnet steel of the type that splits have weak magnetism speed expansion, constant-power speed regulation, poly-magnetic and the raising effect of exerting oneself.Be provided with between motor pole every the magnetic magnetic bridge, reduce leakage field, increase useful flux, improve exert oneself, power-weight ratio, power to volume ratio and efficient.In the motor p-m rotor, regulate magnet steel insertion depth radially in iron core, regulate the dead slot width of edge magnet steel groove and regulate the polar arc angle, increase permanent magnet flux, reluctance torque and output torque, reduce torque ripple.The function brilliance, easy to use, economic benefit and social effect are remarkable, and application prospect is good.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.

Claims (6)

1. high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile, comprise stator and rotor in casing and the casing, described stator comprises stator core and the stator winding that is fixed on casing inner wall, it is characterized in that: described stator core comprises stator yoke (1), stator slot (2) and stator tooth (3), described rotor comprises rotating shaft (7) and rotor core (6), described rotor core (6) inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel (5a), or evenly studding with the type diametrical magnetization rectangular strip magnet steel (5b) that splits, the described diametrical magnetization rectangular strip magnet steel (5a) or the type diametrical magnetization rectangular strip magnet steel (5b) that splits constitute permanent magnetism magnetic pole with pole shoe (4).
2. high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile according to claim 1 is characterized in that: the cylindrical of described pole shoe (4) is non-concentric arcs curved surface.
3. high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile according to claim 1 is characterized in that: be provided with every magnetic magnetic bridge (8) between the permanent magnetism magnetic pole of described diametrical magnetization rectangular strip magnet steel (5a) or split type diametrical magnetization rectangular strip magnet steel (5b) and pole shoe (4) formation.
4. high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile according to claim 1, it is characterized in that: the diametrical magnetization rectangular strip magnet steel (5a) that described rotor core (6) inner periphery direction evenly studs with, magnet steel (5a) in iron core radially insertion depth do not wait.
5. high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile according to claim 1, it is characterized in that: described rotor core (6) inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel (5a), and the dead slot width of its edge magnet steel groove (9) does not wait.
6. high power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile according to claim 1, it is characterized in that: described rotor core (6) inner periphery direction evenly studs with diametrical magnetization rectangular strip magnet steel (5a), and the dead slot angle of its edge magnet steel groove is polar arc angle (a 10) difference.
CNA2007101352614A 2007-11-12 2007-11-12 High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile Pending CN101436793A (en)

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CNA2007101352614A CN101436793A (en) 2007-11-12 2007-11-12 High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile

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Application Number Priority Date Filing Date Title
CNA2007101352614A CN101436793A (en) 2007-11-12 2007-11-12 High power wide velocity modulation built-in permanent magnet brushless wheel motor for electric automobile

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917076A (en) * 2010-08-26 2010-12-15 苏州工业园区和鑫电器有限公司 Permanent magnet drive motor for solar tracking system
CN102355071A (en) * 2011-09-28 2012-02-15 苏州和鑫电气股份有限公司 Built-in permanent-magnetic motor rotor and motor comprising same
CN102361385A (en) * 2011-10-13 2012-02-22 中国船舶重工集团公司第七○五研究所 Brushless direct current motor
CN102570668A (en) * 2012-03-20 2012-07-11 中科盛创(青岛)电气有限公司 Unequal gap permanent magnetic motor rotor sheet
CN103138521A (en) * 2011-12-05 2013-06-05 三星电子株式会社 Brushless motor
CN104253499A (en) * 2014-09-19 2014-12-31 江苏大学 Direct-axis magnetic field enhanced type wide-range speed control permanent magnet brushless motor for electric automobile
CN104882981A (en) * 2015-06-15 2015-09-02 上海电机系统节能工程技术研究中心有限公司 Rotor punching structure for permanent-magnet servo motor
CN110492696A (en) * 2019-09-05 2019-11-22 合肥工业大学 Optimization Halbach array magneto is split than the method with polar arc ratio

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917076A (en) * 2010-08-26 2010-12-15 苏州工业园区和鑫电器有限公司 Permanent magnet drive motor for solar tracking system
CN101917076B (en) * 2010-08-26 2012-12-12 苏州和鑫电气股份有限公司 Permanent magnet drive motor for solar tracking system
CN102355071A (en) * 2011-09-28 2012-02-15 苏州和鑫电气股份有限公司 Built-in permanent-magnetic motor rotor and motor comprising same
CN102361385A (en) * 2011-10-13 2012-02-22 中国船舶重工集团公司第七○五研究所 Brushless direct current motor
CN103138521A (en) * 2011-12-05 2013-06-05 三星电子株式会社 Brushless motor
CN102570668A (en) * 2012-03-20 2012-07-11 中科盛创(青岛)电气有限公司 Unequal gap permanent magnetic motor rotor sheet
CN104253499A (en) * 2014-09-19 2014-12-31 江苏大学 Direct-axis magnetic field enhanced type wide-range speed control permanent magnet brushless motor for electric automobile
CN104253499B (en) * 2014-09-19 2017-07-18 江苏大学 The magnetic-field-enhanced wide range speed control permanent magnetic brushless of d-axis used for electric vehicle
CN104882981A (en) * 2015-06-15 2015-09-02 上海电机系统节能工程技术研究中心有限公司 Rotor punching structure for permanent-magnet servo motor
CN104882981B (en) * 2015-06-15 2017-11-07 上海电机系统节能工程技术研究中心有限公司 A kind of rotor punching structure of permanent-magnet servo motor
CN110492696A (en) * 2019-09-05 2019-11-22 合肥工业大学 Optimization Halbach array magneto is split than the method with polar arc ratio

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