CN106899107A - Small-sized ventilation fan driven by single-phase self-starting permanent magnet synchronous motor - Google Patents

Small-sized ventilation fan driven by single-phase self-starting permanent magnet synchronous motor Download PDF

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Publication number
CN106899107A
CN106899107A CN201710136467.2A CN201710136467A CN106899107A CN 106899107 A CN106899107 A CN 106899107A CN 201710136467 A CN201710136467 A CN 201710136467A CN 106899107 A CN106899107 A CN 106899107A
Authority
CN
China
Prior art keywords
stator
poles
impeller
rotor
permanent magnet
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
CN201710136467.2A
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Chinese (zh)
Inventor
叶露微
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201710136467.2A priority Critical patent/CN106899107A/en
Publication of CN106899107A publication Critical patent/CN106899107A/en
Pending legal-status Critical Current

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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
    • H02K1/22Rotating 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/08Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/02Details of the magnetic circuit characterised by the magnetic material
    • 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
    • H02K1/14Stator cores with salient poles
    • H02K1/146Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • 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
    • H02K21/16Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2201/00Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03Machines characterised by aspects of the air-gap between rotor and stator
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03Machines characterised by numerical values, ranges, mathematical expressions or similar information

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

A small-sized ventilator driven by a single-phase self-starting permanent magnet synchronous motor comprises: an impeller; a motor for directly driving the impeller, wherein a stator winding of the motor is connected to a single-phase power supply through a control circuit according to a specified winding direction, the width of an air gap between a permanent magnet rotor and a stator, the number of which is the same as the number of stator poles, is narrowed in a specified rotation direction under each pole, so that in a free state, the axis of each pole of the rotor deflects by an acute angle along the rotation direction by taking the axis of the closest stator pole as a reference; the number of poles of the stator is 2, and the diameter of the impeller is not more than 100 mm; or the number of poles of the stator is 4, and the diameter of the impeller is not more than 150 mm; the method is characterized in that: the cylindrical surface of the permanent magnet rotor is fastened in a cylinder made of soft magnetic alloy. This design can attenuate the vibration noise caused by the rotation speed pulsation.

Description

The small-sized ventilation fan that a kind of single-phase self-starting permanent magnet synchronous motor drives
Technical field
The present invention relates to the small-sized ventilation fan that a kind of single-phase self-starting permanent magnet synchronous motor drives, more particularly to its machine The cooperation of tool, electromagnetic structure;In International Patent Classification (IPC), classification belongs to F04D 25/08.
Background technology
Small-sized ventilation fan quite needs manufacture low cost and energy saving in running using extensive, long operational time.Changed for conventional small With the relatively low situation of Asynchronous Motor Driving efficiency, prior art proposes to change to be driven by single-phase self-starting permanent magnet synchronous motor gas fan Dynamic and energy-conservation and small volume and cost are relatively low, but there are Instantaneous Speed Fluctuations and cause vibration noise during operating.The existing skill The earlier application CN201510650460.3 of the visible the applicant of art.
The content of the invention
The technical problems to be solved by the invention are that it is small-sized that a kind of single-phase self-starting permanent magnet synchronous motor of proposition drives Ventilation fan, can there is relatively low vibration noise, and cost is relatively low.
The technical scheme that the present invention solves the technical problem is, what a kind of single-phase self-starting permanent magnet synchronous motor drove Small-sized ventilation fan, including:
--- impeller;
--- the motor of the direct drive impeller, its stator winding is by regulation around to through controlling circuit to be access to single-phase electricity The width of air gap is narrowed in each pole lower edge regulation direction of rotation between source, with stator poles identical p-m rotor and stator, because And in a free state, the axis of each pole of rotor with the axis of the pole of hithermost stator one as reference, it is inclined along the direction of rotation Turn a sharp angle;
--- the number of poles of the stator is 2 poles, and impeller diameter is not more than 100mm;Or the number of poles of stator is 4 poles, impeller Diameter is not more than 150mm;
It is characterized in that:The face of cylinder of the p-m rotor is anchored in the cylinder that magnetically soft alloy is made.
The rotor is prior in addition to the quality due to cylinder increases and forms inertia damping to the Instantaneous Speed Fluctuations of rotor It is that, according to Lenz's law, the cylinder is both made up of magnetically soft alloy, its satisfactory electrical conductivity can be to the transient speed ripple of p-m rotor Movable property gives birth to electromagnetic damping, thus weakens vibration noise caused by speed ripple;Its good magnetic conductivity makes its position for occupying allow work Make the low loss of magnetic flux to pass through, thus be maintained the efficiency of motor, without increasing electromagnetic material cost.
One of further design of above-mentioned technical proposal is:The magnetically soft alloy is electrical pure iron.Electrical pure iron has excellent Elegant magnetic conductivity and the performance for being easy to machine cut or pressure processing, its moderate electrical conductivity are producing enough electromagnetic dampings On the basis of, rotor circuit power factor can be improved and larger induction torque is produced, improve startability.
The two of the further design of above-mentioned technical proposal are:The magnetically soft alloy is ferritic stainless steel.Its electromagnetic performance Less than electrical pure iron, but without anticorrosion.
Technical scheme and effect will be further described with reference to accompanying drawing in a specific embodiment.
Brief description of the drawings
Fig. 1 is the main Visual schematic diagrames of the basic mechanical structure of various embodiments of the present invention ventilation fan.
Fig. 2 is embodiment of the present invention ventilation fan motor electromagnetism basic structure schematic diagram.
Specific embodiment
The embodiment of the present invention be on the basis of embodiment ventilation fan described in CN201510650460.3 specifications improve and Into its machinery, electromagnetic structure substantially as depicted in figs. 1 and 2, is inherited centrifugal pump described in CN201510650460.3 specifications and implemented The structure design of example (can accordingly compare the Figure of description 1,6 of CN201510650460.3) includes:
--- the aial flow impeller 1 for rotating counterclockwise;
--- it is fixed on the motor 2 of casing;
--- impeller 1 is connected to the output shaft of motor 2, and it has 4 blades;By performance requirement, the number of blade can also It is 3,5 or 6, but 8 had better not be more than.Impeller is injection moulding, diameter 120mm.Impeller should not be bigger, and rotary inertia is preferably most Amount is small, with the starting torque for coordinating motor 2 still less big;
--- motor 2 is inner rotor motor, including stator 100 and p-m rotor 200.
The motor electromagnetism basic structure of 1st embodiment ventilation fan of the invention as shown in Fig. 2 including:
--- rotor 200, is that its section is divided into 4 sectors of symmetrical 90 ° with two orthogonal symmetry axis 400 And each radial magnetizing is the 4 pole p-m rotors of N, S, N, S;
--- stator 100 is constituted by with 4 circular iron cores of salient pole 101 and winding 102;Winding 102 is in 4 salient poles Each coil part around with Insulating frame, then by around being 4 poles to being connected in series, and thus produce 4 poles when being powered Pass through the main flux of air gap between rotor;
--- gradual change is narrowed the width of air gap in the counterclockwise direction between each salient pole of stator core 101 and rotor 200;Therefore exist Free state be no power and without external fluid and rotational structure it is good in the case of, rotor 200 is attracted by stator core, respectively The geometrical axis of pole is the permanent magnet flux axis 700,800 for passing through air gap between rotor respectively with the geometry of adjacent stators salient pole Axis is that to pass through the main flux axis 500,600 of air gap between rotor be reference, one is deflected in the counterclockwise direction less sharp Angle Ω.The present embodiment designs the mechanical angle for 5 ° (10 ° of electrical angle).Change the ratio that the angle can be narrowed with gradual change, and shadow Dynamic torque of sounding and efficiency.The design can avoid rotor in a free state from staying in its axis being overlapped with the axis of stator salient poles And starting torque is zero so-called " dead point " position when making energization, the reluctance torque for being formed also helps turning in preventing from operating Son does not produce torque and stalls when alternating current zero passage.But exactly the electromagnetic structure makes to produce reluctance torque during motor running Vibration.
The embodiment of the present invention is mainly compared to the improvement of embodiment ventilation fan described in CN201510650460.3 specifications:
--- the cylinder 100 that electrical pure iron is made is increased, it is tightly placed in former p-m rotor external cylindrical surface, sees Fig. 1 and Fig. 2 (can respectively compare the Figure of description 1,6 of CN201510650460.3).
Due to less demanding and be reduces cost, electrical pure iron is from the trade mark DT3 in national standard.Use the electrician Pure iron material is drawn into internal diameter and corresponds to the cylindrical shape of former p-m rotor external diameter, and takes axially long with former p-m rotor identical Degree, then former p-m rotor is penetrated in cylinder, reaches fixation while to p-m rotor end and axle sleeve injection molding, or with Tight fit tolerance is directly fastened.
The wall thickness of cylinder takes 0.15~0.8mm.Generally thicker, electromagnetic damping effect is better and startability is slightly worse, and right The useful space is utilized and slightly reduced.Can suitably be adjusted according to experiment, resultant effect.
Because electrical pure iron gets rusty easily, it is necessary to take appropriate rust preventing by prior art depending on use condition, including To the inside and outside face of cylinder plating of cylinder or compound fine copper or thin layer of pure aluminiurn.The thin layer is except can also strengthen electromagnetic damping effect in addition to antirust Really.Wherein, it is higher based on induced-current frequency when starting to cylinder inner cylinder face plating or compound fine copper or thin layer of pure aluminiurn, have Beneficial to taking into account startability and electromagnetic damping.
Certainly, can also be changed to use 400 series ferritic stainless steels.
The control circuit and method of the ventilation fan can still according to embodiment described in CN201510650460.3 specifications.Work as leaf When wheel does not need directional-rotation, motor winding can also directly input AC power and work without electronic switching circuit.
Above-mentioned motor is 4 pole motors, or 2 pole motors, such as U-iron core single-phase permanent-magnet synchronous motor, It can be seen that China Machine Press's version in 2009《Small-power permanent magnet motor principle, design and application》.Now impeller diameter needs control Within 100mm.

Claims (2)

1. the small-sized ventilation fan that a kind of single-phase self-starting permanent magnet synchronous motor drives, including:
--- impeller;
--- the motor of the direct drive impeller, its stator winding is access to single phase poaer supply by regulation around to through control circuit, The width of air gap is narrowed in each pole lower edge regulation direction of rotation between stator poles identical p-m rotor and stator, thus Under free state, the axis of each pole of rotor, as reference, one is deflected along the direction of rotation with the axis of the pole of hithermost stator one Sharp angle;
--- the number of poles of the stator is 2 poles, and impeller diameter is not more than 100mm;Or the number of poles of stator is 4 poles, impeller diameter No more than 150mm;
It is characterized in that:The face of cylinder of the p-m rotor is anchored in the cylinder that magnetically soft alloy is made.
2. according to ventilation fan described in claim 1, it is characterised in that the magnetically soft alloy is electrical pure iron or ferrite stainless Steel.
CN201710136467.2A 2017-03-09 2017-03-09 Small-sized ventilation fan driven by single-phase self-starting permanent magnet synchronous motor Pending CN106899107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710136467.2A CN106899107A (en) 2017-03-09 2017-03-09 Small-sized ventilation fan driven by single-phase self-starting permanent magnet synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710136467.2A CN106899107A (en) 2017-03-09 2017-03-09 Small-sized ventilation fan driven by single-phase self-starting permanent magnet synchronous motor

Publications (1)

Publication Number Publication Date
CN106899107A true CN106899107A (en) 2017-06-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107165843A (en) * 2017-07-10 2017-09-15 叶露微 Low-power scavenger fan directly driven by permanent magnet synchronous motor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105201885A (en) * 2015-10-07 2015-12-30 叶露微 Ventilating fan directly driven by single-phase self-starting permanent-magnet synchronous motor
CN105490412A (en) * 2014-08-06 2016-04-13 德昌电机(深圳)有限公司 Motor rotor and brushless DC motor applying same
CN106230152A (en) * 2016-09-26 2016-12-14 威灵(芜湖)电机制造有限公司 Rotor core assembly, rotor and self-starting permanent magnet synchronous motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105490412A (en) * 2014-08-06 2016-04-13 德昌电机(深圳)有限公司 Motor rotor and brushless DC motor applying same
CN105201885A (en) * 2015-10-07 2015-12-30 叶露微 Ventilating fan directly driven by single-phase self-starting permanent-magnet synchronous motor
CN106230152A (en) * 2016-09-26 2016-12-14 威灵(芜湖)电机制造有限公司 Rotor core assembly, rotor and self-starting permanent magnet synchronous motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
化学工业部人事教育司;化学工业部教育培训中心: "《化工检修钳工工艺学》", 31 January 1997, 化学工业出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107165843A (en) * 2017-07-10 2017-09-15 叶露微 Low-power scavenger fan directly driven by permanent magnet synchronous motor

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