CN109038881A - A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine - Google Patents

A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine Download PDF

Info

Publication number
CN109038881A
CN109038881A CN201811005472.0A CN201811005472A CN109038881A CN 109038881 A CN109038881 A CN 109038881A CN 201811005472 A CN201811005472 A CN 201811005472A CN 109038881 A CN109038881 A CN 109038881A
Authority
CN
China
Prior art keywords
magnetic pole
slot
permanent magnet
pole slot
outside
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811005472.0A
Other languages
Chinese (zh)
Inventor
张超
陈丽香
王世伟
唐任远
孙宁
王晓宇
王凯东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenyang University of Technology
Original Assignee
Shenyang University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenyang University of Technology filed Critical Shenyang University of Technology
Priority to CN201811005472.0A priority Critical patent/CN109038881A/en
Publication of CN109038881A publication Critical patent/CN109038881A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/16Stator cores with slots for windings
    • H02K1/165Shape, form or location of the slots
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753Inner 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
    • H02K1/276Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K29/00Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Abstract

The invention discloses a kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machines, including casing, stator core, rotor core, armature winding, end cap, bearing, shaft and permanent magnet;Stator core is embedded in casing and fixes, and armature winding is located in stator coring groove, and rotor core is assemblied in shaft, and shaft passes through the end cap at casing both ends and is supported by the bearing in end cap;Rotor core along the circumferential direction processes 2pA magnetic pole group slot, each magnetic pole group slot are circumferentially uniformly distributed along rotor core;Permanent magnet is equipped in magnetic pole group slot, it is also identical to be separated by magnetic pole group slot corresponding permanent magnet on the contrary, to be separated by magnetic pole group slot structure identical for permanent magnet polarity in adjacent pole group slot.The present invention is conducive to improve magnetic resistance of motor torque utilization rate, reduces permanent magnet dosage, improves electric efficiency, increases electric machine speed regulation range, enhances rotor Mechanical Reliability.

Description

A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine
Technical field
The invention belongs to radial flux motors fields, relate generally to a kind of few permanent magnet high-performance permanent magnet Reluctance synchronous electricity Machine.
Background technique
One layer of permanent magnet is arranged in conventional internal formula permanent magnet synchronous motor usually in rotor, which mainly utilizes permanent magnet The permanent-magnet torque of generation, it is lower to the utilization rate of reluctance torque, that there are permanent magnet usage amounts is big, weak magnetic is difficult, motor speed by Limit, the problems such as power of motor density is low.Especially motor is in high velocity function of overhigh counter electromotive force, once out of control will damage driving system System, influences the security performance under high speed operation of motor.Therefore, it is necessary to research and develop a kind of efficient, high power density, wide speed regulating range High-performance permanent magnet motor.
Rare-earth permanent magnet is expensive, wherein the rare earth element contained is non-renewable, while the exploitation pair of rare earth element Environmental pollution is larger.
Many researchers propose the rotor structure of permanent magnet reluctance motor, but all have the defects that different degrees of, restriction The comprehensive performance of motor:
(1) Chinese patent CN102761222A proposes a kind of permanent magnetism assist in synchronization reluctance motor and its rotor and the motor Installation method.The assist in synchronization magnetic resistance motor rotor is uniformly distributed four permanent magnet trough groups, each permanent magnet trough in circumferencial direction Group includes at least two layers of permanent magnet trough, and in order to improve the utilization rate of magnetic resistance of motor torque, rotor Permanent-magnet layer is put in invention The depth for entering rotor is designed.The characteristics of invention is: the increase of the permanent magnet trough number of plies improves in each permanent magnet trough group Reluctance torque utilization rate, but the permanent magnet trough in invention is arc-shaped, the processing and manufacturing increased costs of arcuate permanent magnetic block, and this turn Minor structure is not suitable for using high-performance permanent magnet;
(2) Chinese patent CN105958692A discloses a kind of high torque density permanent-magnet magnetic resistance synchronous motor rotor structure, is turning Through slot group is arranged in sub- even circumferential, and every group of through slot includes 3 layers of U-shaped through slot, by the straight bottom of permanent magnet insertion U-shaped through slot.The hair Bright feature is: 3 layers of U-shaped through slot improve magnetic resistance of motor torque utilization rate, are conducive to the torque density for improving motor, but the hair Bright proposed rotor structure motor gas-gap magnetic flux density waveforms aberration rate increases, and the loss of electric machine and torque pulsation is caused to increase, and Due to lacking reinforcing rib, rotor speed is limited;
(3) Chinese patent CN105846579A discloses a kind of permanent magnetic resistance motor, rotor it is every extremely on it is radially right Claim arrangement that several magnet isolation tanks are set, improves the reluctance torque utilization rate of motor, permanent magnet is located at magnet isolation tank normal direction, passes through Fin is set between magnet isolation tank and reduces rotor centrifugal force, and installs protective case cylinder additional outside rotor and avoids rotor in high-speed cruising It is acted on and is damaged by centrifugal force.The characteristics of invention is: multilayer magnet isolation tank increases inductance difference and improves reluctance torque utilization Rate, fin and protective case ensure that the security reliability under high speed operation of motor, but the permanent magnet modes of emplacement of the structure causes Air gap flux density aberration rate increases, and the loss of electric machine and torque pulsation increase, simultaneously because having installed non-magnetic protective case outside rotor additional Cylinder causes motor effective air gap to increase, and limits the utilization of reluctance torque;
(4) Chinese patent CN107979197A proposes a kind of asymmetrical rotor punching permanent magnetism assist in synchronization reluctance motor, permanent magnetism The each magnetic pole of reluctance rotor has a set of permanent magnets, and set of permanent magnets is arranged along field axis, in permanent magnet two sides setting about The asymmetric magnetic resistance slot of field axis.The characteristics of invention, is: reluctance torque utilization rate improved, permanent magnet dosage is reduced, Reduce motor material cost, motor torque ripple reduced by asymmetric magnetic structure, but the structural stratification number it is more and Magnetic circuit is uneven, and manufacturing processing technic is complicated.
(5) Chinese patent CN202872490U proposes a kind of magneticfocusing permanent-magnet magnetic resistance rotor structure, each slot group of rotor Comprising 4 slots, the characteristics of 4 slots place permanent magnet, the invention, is: having poly- magnetic energy power, improves convex grey subset, increase forever The utilization rate of magnet, but since the protection that first layer permanent magnet lacks reinforcing rib causes rotor reliability poor, meanwhile, lower layer is forever Magnet filling excessively causes air gap magnetic density waveform aberration rate to increase;
(6) italian patent WO2009063350A2 discloses a kind of permanent-magnet magnetic resistance rotor structure, each magnetic pole include three layers every Magnetic slot, first layer magnet isolation tank are arranged reinforcing rib, place in first layer magnet isolation tank without reinforcing rib between the second layer, third layer magnetic bridge Permanent magnet places permanent magnet in the second layer, third layer magnet isolation tank, and permanent magnet is placed in reinforcing rib two sides.The spy of the invention Point is: reduces permanent magnet dosage, improves reluctance torque utilization rate, but since hierarchy number is more, be easy to be saturated rotor magnetic circuit, And first layer magnet isolation tank is easy to cause rotor failure under high revolving speed without reinforcing rib.
Summary of the invention
Goal of the invention
For effectively save resource, mitigate environmental pressure, while in order to improve motor performance, reducing permanent magnet in magneto and using Amount increases motor output-constant operation region, solves the problems, such as that magneto reluctance torque utilization rate is low, the present invention provides one kind Few permanent magnet high-performance permanent magnet reluctance-synchronous machine.
Technical solution
A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine, including casing, stator core, rotor core, armature winding, end Lid, bearing, shaft and permanent magnet;It is characterized by: fixed in stator core insertion casing, armature winding is located at stator coring groove Interior, rotor core is assemblied in shaft, and shaft passes through the end cap at casing both ends and is supported by the bearing in end cap;Rotor Iron core along the circumferential direction processes 2pA magnetic pole group slot,pFor motor number of pole-pairs, permanent magnet is known as a pole in adjacent pole group slot Right, each magnetic pole group slot is circumferentially uniformly distributed along rotor core;Permanent magnet, permanent magnet in adjacent pole group slot are equipped in magnetic pole group slot It is also identical to be separated by magnetic pole group slot corresponding permanent magnet on the contrary, to be separated by magnetic pole group slot structure identical for polarity.
Stator core is axially overrided to form by stator punching, and rotor core is axially overrided to form by rotor punching.
The each magnetic pole group slot of rotor core includes inside and outside two magnetic pole slots, and the magnetic pole slot close to axle center is inside magnetic pole slot, Magnetic pole slot far from axle center is outside magnetic pole slot, and outside magnetic pole slot includes two slots, and inside magnetic pole slot includes three slots, inside magnetic Three slots of pole slot are in U-shape V-shaped outside magnetic pole slot semi-surrounding in inside.
Angle between the outside magnetic pole slot a and outside magnetic pole slot b of rotor core isθ 1, 0 °≤θ 1≤ 180 °, inside magnetic pole Slot c and rotor core diameter of section direction are perpendicular, and inside magnetic pole slot a and inside magnetic pole slot b are respectively in inside magnetic pole slot c two Side, the angle between inside magnetic pole slot a and inside magnetic pole slot b areθ 2, 0 °≤θ 2≤180°。
Permanent magnet is placed in outside magnetic pole slot a and outside magnetic pole slot b slot, in inside magnetic pole slot a and inside magnetic pole slot b slot Permanent magnet is placed, places un-conducted magnetic material or vacant in the magnetic pole slot c slot of inside.
Outside magnetic pole slot a is identical with the permanent magnet specification in the magnetic pole slot b of outside, in inside magnetic pole slot a and inside magnetic pole slot b Permanent magnet specification it is identical.
Outside magnetic pole slot a and outside magnetic pole slot b are not penetrated through, and have reinforcing rib between two slots.
Inside magnetic pole slot a is not penetrated through with inside magnetic pole slot c, there is reinforcing rib, inside magnetic pole slot b and inside magnetic pole slot between two slots C is not penetrated through, and has reinforcing rib between two slots.
Advantage and effect
The present invention is a kind of few permanent magnet high-performance permanent magnet reluctance motor, is had the following advantages and beneficial effects:
(1) present invention can effectively improve the utilization rate of reluctance torque, reduce the dosage of permanent magnet, reduce motor cost, improve Motor torque density;
(2) present invention can effectively widen motor output-constant operation area, enhance motor in high-speed region reliability of operation;
(3) present invention can be effectively improved air gap magnetic density waveform, reduce the loss of electric machine and torque pulsation.
(4) present invention can efficiently use reluctance torque, save permanent-magnet material, high reliablity under high revolving speed operating condition, Torque pulsation is small.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is stator and rotor cores front view.
Fig. 3 is rotor punching front view.
Description of symbols:
1, casing;2, stator core;3, rotor core;4, armature winding;5, end cap;6, bearing;7, shaft;10, stator punching; 20, rotor punching;21, outer side slot a;22, outer side slot b;23, inner side slot a;24, inner side slot b;25, inner side slot c.
Specific embodiment
Following further describes the present invention with reference to the drawings:
As shown in Figure 1, Figure 2 and Figure 3, a kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine, including casing 1, stator core 2, rotor core 3, armature winding 4, end cap 5, bearing 6, shaft 7 and permanent magnet.Stator core 2 is laminated by stator punching 10 is axial It forms, rotor core 3 is overrided to form by rotor punching 20 is axial.Stator core 2 is embedded in fixed in casing 1, stator core 2 and machine Between shell 1 interference fit or by bonded adhesives be adhesively fixed all can, armature winding 4 is located in 2 slot of stator core, rotor core 3 dress Assigned in shaft 7, rotor core 3 and shaft 7 by interference fit or keyway cooperation assembled all can, shaft 7 passes through casing 1 The end cap 5 at both ends is simultaneously supported by the bearing 6 in end cap 5;Rotor core 3 along the circumferential direction processes 2pA magnetic pole group slot,p For motor number of pole-pairs, in adjacent pole group slot permanent magnet be known as one it is extremely right, each magnetic pole group slot is circumferential uniformly point along rotor core 3 Cloth;Permanent magnet is equipped in magnetic pole group slot, permanent magnet polarity in adjacent pole group slot is on the contrary, identical, the phase that is separated by magnetic pole group slot structure It is also identical every permanent magnet corresponding in magnetic pole group slot.The each magnetic pole group slot of rotor core 3 includes inside and outside two magnetic pole slots, by paraxial The magnetic pole slot of the heart is inside magnetic pole slot, and the magnetic pole slot far from axle center is outside magnetic pole slot, and outside magnetic pole slot includes two slots, inside Magnetic pole slot includes three slots, and three slots of inside magnetic pole slot are in U-shape V-shaped outside magnetic pole slot semi-surrounding in inside.Rotor Angle between the outside magnetic pole slot a21 and outside magnetic pole slot b22 of iron core 2 isθ 1, 0 °≤θ 1≤ 180 °, inside magnetic pole slot c25 with 3 diameter of section direction of rotor core is perpendicular, and inside magnetic pole slot a23 and inside magnetic pole slot b24 are respectively in inside magnetic pole slot c25 two Side, the angle between inside magnetic pole slot a23 and inside magnetic pole slot b24 areθ 2, 0 °≤θ 2≤180°.Outside magnetic pole slot a21 and outside Permanent magnet is placed in magnetic pole slot b22 slot, places permanent magnet, inside magnetic pole in inside magnetic pole slot a23 and inside magnetic pole slot b24 slot Un-conducted magnetic material or vacant is placed in slot c25 slot.Outside magnetic pole slot a21 is identical with the permanent magnet specification in the magnetic pole slot b22 of outside, Inside magnetic pole slot a23 is identical as the permanent magnet specification in the magnetic pole slot b24 of inside.In outside magnetic pole slot a21 and outside magnetic pole slot b22 Permanent magnet specification be different from the permanent magnet specification in inside magnetic pole slot a23 and inside magnetic pole slot b24.Inside and outside specification is different forever Magnet can optimize the air gap magnetic density waveform of motor, improve the performance of motor.Outside magnetic pole slot a21 and outside magnetic pole slot b22 are not It penetrates through, has reinforcing rib between two slots;Inside magnetic pole slot a23 is not penetrated through with inside magnetic pole slot c25, has reinforcing rib between two slots;Inside magnetic Pole slot b24 is not penetrated through with inside magnetic pole slot c25, has reinforcing rib between two slots.Reinforcing rib plays the role of reinforcement and every magnetic, mainly Effect is to reinforce.
The course of work of the invention is as follows: permanent-magnet magnetic resistance synchronous motor proposed by the present invention, and the winding in stator slot is connected Power supply, electric current flow through winding and generate rotating excitation field, and the magnetic field interaction which generates with permanent-magnet magnetic resistance rotor makes Permanent-magnet magnetic resistance rotor, which rotates output mechanical energy, can effectively improve magnetic resistance using permanent-magnet magnetic resistance rotor structure proposed by the present invention Accounting of the torque in effective torque reduces air gap magnetic density waveform aberration rate, reduces the vibration noise of permanent-magnet magnetic resistance synchronous motor With loss, while the reliability under permanent-magnet magnetic resistance synchronous motor high-speed cruising operating condition is improved.
A kind of permanent-magnet synchronous reluctance motor and its rotor of the present invention, have be simple to manufacture, reluctance torque utilization rate Height, rotor high reliablity, the advantage that loss is small, torque pulsation is small are conducive to energy conservation.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art To make other various forms of variations or variation, all embodiments can not be exhaustive here, it is all to belong to this hair The obvious changes or variations that bright technical solution is extended are still in the scope of protection of the present invention.

Claims (8)

1. a kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine, including casing, stator core, rotor core, armature winding, End cap, bearing, shaft and permanent magnet;It is characterized by: fixed in stator core insertion casing, armature winding is located at stator core In slot, rotor core is assemblied in shaft, and shaft passes through the end cap at casing both ends and is supported by the bearing in end cap;Turn Sub- iron core along the circumferential direction processes 2pA magnetic pole group slot,pFor motor number of pole-pairs, permanent magnet is known as a pole in adjacent pole group slot Right, each magnetic pole group slot is circumferentially uniformly distributed along rotor core;Permanent magnet, permanent magnet in adjacent pole group slot are equipped in magnetic pole group slot It is also identical to be separated by magnetic pole group slot corresponding permanent magnet on the contrary, to be separated by magnetic pole group slot structure identical for polarity.
2. few permanent magnet high-performance permanent magnet reluctance-synchronous machine according to claim 1, it is characterised in that: stator core by Stator punching is axially overrided to form, and rotor core is axially overrided to form by rotor punching.
3. few permanent magnet high-performance permanent magnet reluctance-synchronous machine according to claim 1, it is characterised in that: rotor core is every A magnetic pole group slot includes inside and outside two magnetic pole slots, and the magnetic pole slot close to axle center is inside magnetic pole slot, and the magnetic pole slot far from axle center is Outside magnetic pole slot, outside magnetic pole slot include two slots, and inside magnetic pole slot includes three slots, and three slots of inside magnetic pole slot are in U-shape V-shaped outside magnetic pole slot semi-surrounding in inside.
4. few permanent magnet high-performance permanent magnet reluctance-synchronous machine according to claim 3, it is characterised in that: rotor core Angle between outside magnetic pole slot a and outside magnetic pole slot b isθ 1, 0 °≤θ 1≤ 180 °, inside magnetic pole slot c and rotor core section Diametrical direction is perpendicular, and inside magnetic pole slot a and inside magnetic pole slot b are respectively in the inside two sides magnetic pole slot c, inside magnetic pole slot a with it is interior Angle between the magnetic pole slot b of side isθ 2, 0 °≤θ 2≤180°。
5. few permanent magnet high-performance permanent magnet reluctance-synchronous machine according to claim 4, it is characterised in that: outside magnetic pole slot Permanent magnet is placed in a and outside magnetic pole slot b slot, places permanent magnet, inside magnetic in inside magnetic pole slot a and inside magnetic pole slot b slot Un-conducted magnetic material or vacant is placed in the slot c slot of pole.
6. few permanent magnet high-performance permanent magnet reluctance-synchronous machine according to claim 5, it is characterised in that: outside magnetic pole slot A is identical with the permanent magnet specification in the magnetic pole slot b of outside, and inside magnetic pole slot a is identical as the permanent magnet specification in the magnetic pole slot b of inside.
7. few permanent magnet high-performance permanent magnet reluctance-synchronous machine according to claim 4, it is characterised in that: outside magnetic pole slot A and outside magnetic pole slot b are not penetrated through, and have reinforcing rib between two slots.
8. few permanent magnet high-performance permanent magnet reluctance-synchronous machine according to claim 4, it is characterised in that: inside magnetic pole slot A is not penetrated through with inside magnetic pole slot c, there is reinforcing rib between two slots, and inside magnetic pole slot b is not penetrated through with inside magnetic pole slot c, is had between two slots and is added Strengthening tendons.
CN201811005472.0A 2018-08-30 2018-08-30 A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine Pending CN109038881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811005472.0A CN109038881A (en) 2018-08-30 2018-08-30 A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811005472.0A CN109038881A (en) 2018-08-30 2018-08-30 A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine

Publications (1)

Publication Number Publication Date
CN109038881A true CN109038881A (en) 2018-12-18

Family

ID=64626374

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811005472.0A Pending CN109038881A (en) 2018-08-30 2018-08-30 A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine

Country Status (1)

Country Link
CN (1) CN109038881A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110994834A (en) * 2019-11-28 2020-04-10 江苏大学 Alternating-direct axis inductance variable permanent magnet brushless motor and wide-area efficient optimization design method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110994834A (en) * 2019-11-28 2020-04-10 江苏大学 Alternating-direct axis inductance variable permanent magnet brushless motor and wide-area efficient optimization design method thereof
CN110994834B (en) * 2019-11-28 2021-12-21 江苏大学 Alternating-direct axis inductance variable permanent magnet brushless motor and wide-area efficient optimization design method thereof

Similar Documents

Publication Publication Date Title
CN201107842Y (en) Disc type switch reluctance motor
CN1937356B (en) Stator permanent-magnet double salient pole fault-tolerant motor
CN105978199B (en) Permanent magnetism vernier motor
CN109217597B (en) Composite excitation amorphous alloy axial flux motor
CN106385203B (en) A kind of axial phase inner stator permanent magnetism off-set magnetic suspension switching magnetic-resistance fly-wheel motor
CN104410234A (en) Spindle synchronous motor with wide speed regulation range for lathe
CN107359767A (en) A kind of Halbach types array permanent magnetism disc type iron core-free hollow shaft motor
CN104882978A (en) Low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure
CN106849431A (en) Step skewed pole rotor and permagnetic synchronous motor
CN101741197B (en) Flux switching type magnetic-concentration transverse flux permanent magnetic wind generator
CN204334259U (en) A kind of electric vehicle rotor segment is oblique pole formula double plate magneto oppositely
CN106026467B (en) Permasyn morot and its rotor
CN205882877U (en) Mix magnetic circuit driving motor
CN103248189A (en) Bipolar stator-surface-mounting type permanent magnet motor
CN208767862U (en) A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine
CN109038881A (en) A kind of few permanent magnet high-performance permanent magnet reluctance-synchronous machine
CN202696306U (en) Built-in permanent magnet motor rotor and permanent magnet motor with same
Liu et al. Operation principle and topology structures of axial flux-switching hybrid excitation synchronous machine
CN204928407U (en) Brushless dc motor
CN208479438U (en) The latent oil of underground cartridge type operation directly drives the ultra-fine long high performance permanent magnetic synchronous motor of pump
CN110061603A (en) A kind of rotor magnetic circuit decoupling type mixed at high speed excitation magnetic synchronization motor
CN102005836B (en) Magnetic flow switching dual-salient pole motor with reinforced outer rotor magnetic field
CN101951105A (en) Modularized permanent magnet synchronous generator
CN102684342A (en) Built-in permanent magnet motor rotor and permanent magnet motor with rotor
CN110838779A (en) Mixed excitation wound rotor and mixed excitation wound synchronous motor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination