CN106130288B - High security magnetic-leakage preventing permanent magnet synchronous motor - Google Patents
High security magnetic-leakage preventing permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN106130288B CN106130288B CN201610748958.8A CN201610748958A CN106130288B CN 106130288 B CN106130288 B CN 106130288B CN 201610748958 A CN201610748958 A CN 201610748958A CN 106130288 B CN106130288 B CN 106130288B
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- rotor
- pressure
- end plates
- pressure sensor
- core
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- 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
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
Abstract
The invention discloses a kind of high security magnetic-leakage preventing permanent magnet synchronous motor, structure includes: field frame assembly, leakproof magnet rotor；The field frame assembly includes: base, stator core, stator coil, bearing assembly, external fan, outer shroud, end cap and outer cooler；The leakproof magnet rotor includes: shaft, rotor core, winding, rotor end plates, hinged bolts；The rotor core is several sector magnetic pole iron cores, the rotor end plates, hinged bolts are all made of non-magnet material, there is articulation hole at rotor core both ends, the rotor end plates are fixed on the both ends of the rotor core by the hinged bolts, prevent leakage field, and pressure sensitivity gasket is also embedded in rotor end plates, it constitutes pressure sensitivity system with the pressure sensitivity piece that articulation hole is embedded in, pressure signal can be issued to the signal receiving device loaded on base, so as to when pole core centrifugal force is more than default safety value, it is sounded an alarm by signal device and is cut off the power, guarantee the safety of motor operation to the greatest extent.
Description
Technical field
The present invention relates to field of motor manufacturing more particularly to a kind of safety coefficient height and the permanent magnetism that can effectively prevent leakage field
Synchronous motor.
Background technique
On AC network, AC asynchronous motor is also used extensively to drag work mechanism in people.Alternating current asynchronous is electronic
Machine has many advantages, such as that structure is simple, reliable operation, the service life is long, at low cost, maintenance is easy.But with synchronous motor phase
Generation than, rotating excitation field need to draw reactive power from power grid, therefore low efficiency, and power factor is low, and especially at light load, this is big
The loss of route and power grid is increased greatly.For a long time, in the occasion for not requiring speed regulation, such as blower, water pump, machine tool
In driving, asynchronous motor still occupies leading position, virtually has lost a large amount of electric energy, the birth of permasyn morot,
The shortcomings that overcoming with upper motor, three-phase permanent-magnetic synchronous motors are consistent with the stationary part of three phase asynchronism induction-motor,
Its main distinction is in rotor portion, and rotor uses solid construction, substitutes electric shock magnetic magnetic pole with permanent magnet, simplifies structure,
Slip ring, the brush for eliminating rotor, realize brushless structure, reduce rotor volume；Excitation DC power supply is eliminated, is eliminated
Excitation loss.But since the big problem of permanent-magnet synchronous motor rotor magnetic leakage factor inevitably causes the stray loss of motor
Cause that the motor feels hot greatly, exacerbate the temperature rise of motor, is easy that the intracorporal permanent magnet of rotor is made to generate non-reversible high-temperature loss of excitation, simultaneously
Since permanent-magnet synchronous motor rotor magnetic leakage factor is big, permanent-magnet material utilization rate is reduced.On the other hand, due to permanent magnet synchronous electric
The distinctive magnetic shielding structure of motivation makes mechanical strength and rigidity poor, and rotor sector solid magnetic pole iron core is easy to fall off because of centrifugal force
Motor operation accident is caused, so that the security reliability of motor operation substantially reduces, causes motor damage.
Summary of the invention
The present invention is that the existing permanent-magnet synchronous motor rotor assembly magnetic leakage factor of solution is big, causes the stray loss of motor big
So that the motor feels hot, permanent-magnet material utilization rate is low and rotor sector solid magnetic pole iron core is easy electricity caused by falling off because of centrifugal force
The problem of machine interruption of service, provides a kind of non-magnetic using the connection of non-magnet material hinged bolts in rotor magnetic pole iron core two sides
Structure of the material rotors end plate every magnetic.Structure of the invention includes: field frame assembly, leakproof magnet rotor；The field frame assembly includes: machine
Seat, stator core, stator coil, bearing assembly, the coil are embedded in stator core and are fixedly mounted in base；It is described
For leakproof magnet rotor loaded in the stator core, structure includes: shaft, rotor core, winding, rotor end plates, articulation hole spiral shell
Bolt, pressure sensitivity gasket, winding；The winding is wound on the rotor core；The rotor core is fixed in the shaft,
Including several fan-shaped solid magnetic pole iron cores, the rotor end plates, hinged bolts are all made of non-magnet material, and the sector is solid
There are several articulation holes at pole core both ends；The rotor end plates are embedding, and there are two the pressure sensitivity gasket, two pressure sensitivity gasket phases
It is centrosymmetric for the axis hole at the rotor end plates center, and corresponding one fan-shaped solid magnetic pole iron core of each pressure sensitivity gasket；
There are several screw hole areas in the rotor end plates, wherein the fan-shaped solid magnetic pole iron core in corresponding one of each screw hole area, with the articulation
The rotor end plates are fixed in the articulation hole at the fan-shaped solid magnetic pole iron core both ends by hole bolt；It is filled in the pressure sensitivity gasket
There is pressure sensor device；The field frame assembly further includes external fan, outer shroud, end cap and outer cooler.
Preferably, the screw hole in the screw hole area has three floor, every layer of screw hole is located on same circular arc, from paraxial hole to distal shaft hole
Quantity be respectively 1,3,4, totally 8, wherein embedded with pressure sensitivity gasket rotor end plates screw hole area second row among screw hole institute
In the articulation hole of corresponding sector solid magnetic pole iron core, dovetail groove, the swallow are carved in the smooth side wall of the nearly axis hole
Tail connected in star is provided with pressure sensor piece.
Preferably, the pressure sensor piece be voltage inductance answer material piece, hydrostatic sensor both diaphragms it is any；
Its corresponding pressure sensor device is piezoelectric transducer, hydrostatic sensor.
Preferably, the pressure sensor piece is that voltage inductance answers material piece, the pressure sensor device is piezoelectric transducer, band
There are copper facing, the piezoelectric transducer to the articulation hole in the nut lower surface of the corresponding hinged bolts of the articulation hole of dovetail groove
There are circuits between bolt.
Preferably, the power supply of the pressure sensor device is built-in lithium battery or closing coil.
Preferably, the non-magnet material is copper, aluminium or stainless steel.
Preferably, further including automatic overvoltage power off device, the automatic overvoltage power off device includes signal receiving device, control
Device processed, relay；The signal receiving device is loaded on the pressure that on the base, can receive the pressure sensor device sending
Signal, received pressure signal be more than in preset rated value on the control device, by control device control it is described after
Electric appliance cuts off motor power supply, to protect motor to be safely operated.
Preferably, the method for determining the rated value, comprising the following steps:
S1. manufacture with have on the consistent circular dies of the articulation hole pore size and its wall it is recessed with the swallow-tail form
Groove shape groove of the same size；
S2. fixation pressure sensing chip in the groove in mold in step sl, and by pressure sensor piece and pressure sensing
Device connection, and by the external signal receiving device of pressure sensor device；
S3. pressurizeed with the inner walls of circular dies of from the hydraulic press to the step S1, the pressing mold of the hydraulic press only with
The pressure sensor piece completely attaches to, and stops when the pressure that hydraulic press applies is equal to the permitting stress of the hinged bolts
Pressurization, and record the i.e. described rated value of pressure value that the signal receiving device is shown；The pressure is applied by hydraulic press
What the pressing mold of pressure and hydraulic press and the squish area of dovetail groove added was calculated.
Principle and effect: the rotor end plates and non-magnet material hinged bolts of non-magnet material completely close permanent-magnet steel
In rotor block, the substantially the same magnetic conductivity with vacuum of the magnetic conductivity of non-magnet material, so that the leakage field at rotor block both ends is non-
Often small, the main flux overwhelming majority linkage armature winding that permanent-magnet steel is provided to external magnetic circuit, the utilization rate of permanent-magnet steel is improved,
Achieve good magnetism isolating effect.Meanwhile according to rotor sector solid magnetic pole iron core in synchronizing motors centrifugal force it is big
It is small, rotor end plates thickness and hinged bolts diameter are designed by Strength co-mputation, so that entire rotor forms one, improved forever
The strength and stiffness of magneto rotor assembly avoid rotor sector solid magnetic pole iron core and are easy motor caused by falling off because of centrifugal force
Interruption of service, and be provided with dovetail groove in articulation hole side wall, and pressure sensitive device is fixed wherein, and to pressure sensitivity gasket
In pressure sensor device issue signal, enable in whole system real-time monitoring solid magnetic pole hinged bolts by shearing force
Situation, and when it is reached default rated value by shearing force, by automatic overvoltage power off device automatically cutting off power source, improve motor
The security reliability of operation, avoids motor damage.
Detailed description of the invention
Fig. 1 is the first visual angle of leakproof magnet rotor of the present invention schematic diagram.
Fig. 2 is rotor end plates structural schematic diagram of the present invention.
Fig. 3 is the cross-sectional view of articulation hole of the present invention with swallow-tail form.
Fig. 4 is schematic structural view of the invention.
Specific embodiment
Embodiment one
As shown in Figure 1, Figure 2, Figure 3 shows, structure of the invention includes: field frame assembly, leakproof magnet rotor 45；The field frame assembly packet
Include: base 46, stator core 44, stator coil, bearing assembly, the stator coil is embedded in stator core 44 and fixed peace
In base 46；The leakproof magnet rotor 45 include: rotor core 13, shaft 11, rotor end plates 12, hinged bolts 14,
Pressure sensitivity gasket 23, winding；The winding is wound on the rotor core 13；The rotor core 13 is fixed on the shaft 11
On comprising 4 pieces of fan-shaped solid magnetic pole iron cores, the rotor end plates 11, hinged bolts 14 are all made of non-magnet material, described
There are several articulation holes 15 at fan-shaped solid magnetic pole iron core both ends；The pressure sensitivity gasket 23 there are two the rotor end plates 12 are embedding, two
The pressure sensitivity gasket 23 is centrosymmetric relative to the axis hole at 12 center of rotor end plates, and each pressure sensitivity pads 23 correspondences one
A sector solid magnetic pole iron core；There are several screw hole areas in the rotor end plates 12, wherein corresponding one of each screw hole area is fan-shaped real
The rotor end plates 12 are fixed on the fan-shaped solid magnetic pole iron core both ends with the hinged bolts 14 by heart pole core
In articulation hole 15；Pressure sensor device 22 is housed in the pressure sensitivity gasket 23；The field frame assembly further includes external fan 43, exogenous wind
Fan cover 42, end cap and outer cooler 41, outer cooler can be condenser pipe, can also use recirculated cooling water.
More specifically, the screw hole in the screw hole area has three floor, and every layer of screw hole is located on same circular arc, from paraxial hole to remote
The quantity of axis hole is respectively 1,3,4, and totally 8, wherein among the screw hole area second row of the rotor end plates 12 embedded with pressure sensitivity gasket 23
Screw hole 21 corresponding to fan-shaped solid magnetic pole iron core articulation hole 32 in, be carved with swallow-tail form in the smooth side wall of the nearly axis hole
Groove 31, the dovetail groove 31 are provided with pressure sensor piece, and pressure sensor piece here should also include hard filler,
To make pressure sensor piece be close to 32 inner wall of articulation hole, keep dynamometry more accurate.
More specifically, the pressure sensor piece is that voltage inductance answers material piece, and the pressure sensor device 22 is piezoelectricity biography
There are copper facing, the piezoelectric sensing in the nut lower surface of sensor, the corresponding hinged bolts of articulation hole 32 with dovetail groove 31
There are circuits 24 between the hinged bolts for device 22.
More specifically, the power supply of the pressure sensor device 22 is built-in lithium battery or closing coil.
More specifically, the non-magnet material is copper, aluminium or stainless steel.
It more specifically, further include automatic overvoltage power off device, the automatic overvoltage power off device includes that signal receives dress
Set 49, control device 47, relay 48；The signal receiving device 49 can receive the pressure sensing loaded on the base
Device 22 issue pressure signal, received pressure signal be more than in preset rated value on the control device 47, by
Control device 47 controls the relay 48 and cuts off motor power supply, to protect motor to be safely operated.
Embodiment two
Based on three-phase permanent-magnetic synchronous motors produced by the present invention, rated power 500kw, voltage rating 6000v, specified electricity
Flow 51.6A, frequency 50HZ, 1000 revs/min of revolving speed.Rotor sector solid magnetic pole iron core outer diameter Φ 500mm, the fan-shaped solid magnetic of rotor
Pole iron core internal diameter (magnetic shield outer diameter) Φ 280mm, core length 590mm.
Rotor end plates use non-magnet material stainless steel, thickness 15mm, and hinged bolts use non-magnet material stainless steel,
Threaded portion M24, articulation hole smooth part Φ 25mm.
Rotor core both ends end plate and hinged bolts:
(1), material is 304 stainless steels, end plate thickness 15mm, hinged bolts smooth part Φ 25mm, quantity 8.304
Stainless steel material allowable stress [σ]=137.6MP, permitting stress [τ]=85MP, permissible compression stress [σ y]=150MP.
(2), calculation and check:
A. every pole iron core position of centre of gravity:
RZ=38.2(R3-r3) sin α/(R2-r2) α=191.15mm
In formula: the every pole rotor sector magnetic pole iron core position of centre of gravity of RZ-------；
The every pole rotor sector magnetic pole iron core exradius of R--------；
Every pole rotor sector magnetic pole iron core inner circle (sleeve) radius of r--------；
α --- ----sector center of circle half-angle.
B. every pole iron core centrifugal force:
F=Mv2/RZ=0.00112MRZnN2=22032.3 ㎏=216060.3N
In formula: the every pole rotor sector magnetic pole iron core centrifugal force of F--------；
The every pole rotor sector magnetic pole iron core weight of M--------；
V------- position of centre of gravity linear velocity；
NN-------- motor (rotor) revolving speed
C. hinged bolts shear strength is checked:
τ=F/8A=F/8(π r2L)=55MP≤[τ]
--- --- -- hinged bolts shear strength in formula: τ；
The permitting stress of [τ] --- -- material；
The A-------- hinged bolts section of shear；
RL-------- hinged bolts smooth part radius.
D. hinged bolts and end plate crushing strength are checked:
σ=F/8A1=F/8(dt)=72MP≤[σ y]
--- --- -- hinged bolts and end plate crushing strength in formula: σ；
The permissible compression stress of [σ y] --- -- material；
A1-------- hinged bolts and end plate squish area；
D--------- hinged bolts diameter；
T--------- rotor end plates thickness.
Found out by calculating above, is connected using 15mm thickness rotor end plates with 8 hinged bolts, fully meet rotor
The requirement of sector magnetic pole iron core centrifugal force when work.
Embodiment two
The method for determining preset rated value in embodiment one, comprising the following steps:
S1. have and the swallow-tail form on manufacture and the consistent circular dies of 32 pore size of articulation hole and its wall
The consistent groove of 31 shape size of groove；
S2. fixation pressure sensing chip in the groove in mold in step sl, and by pressure sensor piece and pressure sensing
Device 22 connects, and by 22 outer signal reception device 49 of pressure sensor device；
S3. with hydraulic press to the inner wall of circular dies described in step S1 pressurize, the pressing mold of the hydraulic press only with it is described
Pressure sensor piece completely attaches to, and stops adding when the pressure that hydraulic press applies is equal to the permitting stress of the hinged bolts 14
Pressure, and record the i.e. described rated value of pressure value that the signal receiving device 49 is shown；The pressure is applied by hydraulic press
What the pressing mold of the pressure and hydraulic press that add and the squish area of dovetail groove 31 were calculated.
The above is only the ranges that preferred embodiments of the present invention, the present invention that therefore, it cannot be limited according to are implemented, i.e., according to the present invention
Equivalence changes made by description and decoration, all should belong to the present invention covering in the range of.
Claims (5)
1. a kind of high security magnetic-leakage preventing permanent magnet synchronous motor, it is characterised in that: structure includes: field frame assembly, leakproof magnet rotor；
The field frame assembly includes: base, stator core, stator coil, bearing assembly, and the coil is embedded in stator core and solid
Dingan County is in base；The leakproof magnet rotor loaded in the stator core, structure include: shaft, rotor core, around
Group, rotor end plates, hinged bolts, pressure sensitivity gasket, winding；The winding is wound on the rotor core；The rotor iron
Core is fixed in the shaft comprising several sector solid magnetic pole iron cores, the rotor end plates, hinged bolts are all made of non-
There are several articulation holes at permeability magnetic material, the sector solid magnetic pole iron core both ends；The rotor end plates are embedding, and there are two the pressure sensitivity pads
Piece, two pressure sensitivity gaskets are centrosymmetric relative to the axis hole at the rotor end plates center, and each pressure sensitivity gasket is corresponding
One fan-shaped solid magnetic pole iron core；There are several screw hole areas in the rotor end plates, wherein corresponding one of each screw hole area is fan-shaped real
The rotor end plates are fixed on the articulation at the fan-shaped solid magnetic pole iron core both ends with the hinged bolts by heart pole core
In hole；Pressure sensor device is housed in the pressure sensitivity gasket；The field frame assembly further include external fan, outer shroud, end cap and
Outer cooler；The screw hole in the screw hole area has three floor, and every layer of screw hole is located on same circular arc, the quantity from paraxial hole to distal shaft hole
Respectively 1,3,4, totally 8, wherein corresponding to the screw hole being embedded among the screw hole area second row of the rotor end plates of pressure sensitivity gasket
In the articulation hole of fan-shaped solid magnetic pole iron core, it is carved with dovetail groove in the smooth side wall of the nearly axis hole, the swallow-tail form is recessed
Slot is provided with pressure sensor piece；The pressure sensor piece is that voltage inductance answers material piece, and the pressure sensor device is pressure sensing
There are copper facing in device, the nut lower surface of the corresponding hinged bolts of the articulation hole with dovetail groove, and the pressure sensor device arrives
There are circuits between the hinged bolts.
2. high security magnetic-leakage preventing permanent magnet synchronous motor according to claim 1, it is characterised in that: the pressure sensor
Power supply is built-in lithium battery or closing coil.
3. high security magnetic-leakage preventing permanent magnet synchronous motor according to claim 1, it is characterised in that: the non-magnet material is
Copper, aluminium or stainless steel.
4. high security magnetic-leakage preventing permanent magnet synchronous motor according to claim 1, it is characterised in that: further include over-voltage from dynamic circuit breaker
Electric installation, the automatic overvoltage power off device include signal receiving device, control device, relay；The signal receiving device
It is more than in institute in received pressure signal loaded on the pressure signal that on the base, can receive the pressure sensor device sending
When stating preset rated value on control device, the relay cutting motor power supply is controlled by control device, to protect motor to pacify
Row for the national games.
5. high security magnetic-leakage preventing permanent magnet synchronous motor according to claim 4, it is characterised in that: determine the rated value
Method the following steps are included:
S1. have and the dovetail groove shape on manufacture and the consistent circular dies of the articulation hole pore size and its wall
Shape groove of the same size；
S2. fixation pressure sensing chip in the groove in mold in step sl, and pressure sensor piece and pressure sensor are connected
It connects, and by the external signal receiving device of pressure sensor；
S3. pressurizeed with the inner walls of circular dies of from the hydraulic press to the step S1, the pressing mold of the hydraulic press only with it is described
Pressure sensor piece completely attaches to, and stops adding when the pressure that hydraulic press applies is equal to the permitting stress of the hinged bolts
Pressure, and record the i.e. described rated value of pressure value that the signal receiving device is shown；The pressure is applied by hydraulic press
Pressure and the pressing mold of hydraulic press and the squish area of dovetail groove be calculated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610748958.8A CN106130288B (en) | 2016-08-30 | 2016-08-30 | High security magnetic-leakage preventing permanent magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610748958.8A CN106130288B (en) | 2016-08-30 | 2016-08-30 | High security magnetic-leakage preventing permanent magnet synchronous motor |
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| Publication Number | Publication Date |
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| CN106130288A CN106130288A (en) | 2016-11-16 |
| CN106130288B true CN106130288B (en) | 2019-06-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201263115Y (en) * | 2008-09-18 | 2009-06-24 | 李树国 | Rotor device of permanent magnet synchronous machine |
| CN202210717U (en) * | 2011-09-29 | 2012-05-02 | 金进精密泵业制品(深圳)有限公司 | Rotor |
| CN203638932U (en) * | 2013-12-27 | 2014-06-11 | 沈阳蓝光永磁电机技术有限公司 | Solid core inner rotor type gearless permanent magnet synchronous tractor for villa elevator |
| CN206117453U (en) * | 2016-08-30 | 2017-04-19 | 徐延平 | High security leak protection magnetism PMSM |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012023900A (en) * | 2010-07-15 | 2012-02-02 | Fuji Electric Co Ltd | Rotor of permanent magnetic type rotary machine |
-
2016
- 2016-08-30 CN CN201610748958.8A patent/CN106130288B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201263115Y (en) * | 2008-09-18 | 2009-06-24 | 李树国 | Rotor device of permanent magnet synchronous machine |
| CN202210717U (en) * | 2011-09-29 | 2012-05-02 | 金进精密泵业制品(深圳)有限公司 | Rotor |
| CN203638932U (en) * | 2013-12-27 | 2014-06-11 | 沈阳蓝光永磁电机技术有限公司 | Solid core inner rotor type gearless permanent magnet synchronous tractor for villa elevator |
| CN206117453U (en) * | 2016-08-30 | 2017-04-19 | 徐延平 | High security leak protection magnetism PMSM |
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| CN106130288A (en) | 2016-11-16 |
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Effective date of registration: 20220211 Address after: 225700 North District of industrial concentration zone, Anfeng Town, Xinghua City, Taizhou City, Jiangsu Province Patentee after: Taizhou trillion Force Motor Co.,Ltd. Address before: 225700 North District of industrial concentration zone, Anfeng Town, Xinghua City, Taizhou City, Jiangsu Province Patentee before: Xu Yanping |