CN206117453U - High security leak protection magnetism PMSM - Google Patents
High security leak protection magnetism PMSM Download PDFInfo
- Publication number
- CN206117453U CN206117453U CN201620969311.3U CN201620969311U CN206117453U CN 206117453 U CN206117453 U CN 206117453U CN 201620969311 U CN201620969311 U CN 201620969311U CN 206117453 U CN206117453 U CN 206117453U
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- rotor
- pressure
- core
- pressure sensor
- fan
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- Withdrawn - After Issue
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Abstract
The utility model discloses a high security leak protection magnetism PMSM, its structure includes: stator assembly, leak protection magnet rotor, the stator assembly includes: frame, stator core, stator coil, bearing assembly, external fan, the external fan cover, end cover and separately cooling be the ware but, the leak protection magnet rotor includes: pivot, rotor core, winding, rotor end plate, articulation hole bolt, rotor core is a plurality of fan -shaped pole core, rotor end plate, articulation hole bolt all adopt non - magnetic materials, and the rotor core both ends have to cut with scissors makes the hole, articulation hole bolt will the rotor end plate is fixed rotor core's both ends prevent the magnetic leakage, and have still inlayed the pressure gasket on the rotor end plate, and it constitutes the pressure system with the pressure piece of the downthehole embedding of hinge system, can send pressure signal to the signal receiver who adorns in the frame to exceed when predetermineeing safe value at pole core centrifugal force, send out police dispatch newspaper and supply interruption by signal device, safety that maximum assurance motor moved.
Description
Technical field
The utility model is related to field of motor manufacturing, more particularly to a kind of safety coefficient is high and can effectively prevent leakage field
Permagnetic synchronous motor.
Background technology
On AC network, people are also used extensively by AC asynchronous motor to drag work mechanism.Alternating current asynchronous are electronic
Machine has the advantages that simple structure, reliable operation, life-span length, low cost, maintenance are easy.But, with synchronous motor phase
Than the generation of its rotating excitation field need to draw reactive power from electrical network, therefore efficiency is low, and power factor is low, and especially in underloading, this is big
The loss of circuit and electrical network is increased greatly.For a long time, in the occasion for not requiring speed governing, such as blower fan, water pump, machine tool
In driving, asynchronous motor still occupies leading position, virtually have lost a large amount of electric energy, the birth of permasyn morot,
Overcome with the shortcoming of upper motor, three-phase permanent-magnetic synchronous motors are consistent with the stationary part of three phase asynchronism induction-motor,
Its main distinction is that, in rotor portion, its rotor adopts solid construction, and with permanent magnet electric shock magnetic magnetic pole is substituted, and simplifies structure,
Slip ring, the brush of rotor are eliminated, brushless structure is realized, rotor volume is reduced；Excitation DC power supply is eliminated, is eliminated
Excitatory loss.But because 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, easily make the permanent magnet in rotor body produce non-reversible high-temperature loss of excitation, while
Because 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 causes mechanical strength and rigidity poor, and rotor sector solid magnetic pole iron core is easily because centrifugal force comes off
Cause motor operation accident so that the security reliability of motor operation is substantially reduced, and causes motor damage.
The content of the invention
The utility model is big to solve existing permanent-magnet synchronous motor rotor assembly magnetic leakage factor, causes the spuious damage of motor
Consumption is big so that the motor feels hot, permanent-magnet material utilization rate is low, and rotor sector solid magnetic pole iron core is easily made because centrifugal force comes off
Into the problem of motor operation accident, there is provided a kind of to connect non-using non-magnet material hinged bolts in rotor magnetic pole iron core both sides
Structure of the permeability magnetic material rotor end plates every magnetic.The utility model structure includes：Field frame assembly, leakproof magnet rotor；The stator is total
Into including：Support, stator core, stator coil, bearing assembling, the coil is embedded in stator core and is fixedly mounted on machine
In seat；Loaded in the stator core, its structure includes the leakproof magnet rotor：Rotating shaft, rotor core, winding, rotor end plates,
Hinged bolts, pressure sensitivity pad, winding；The winding is wound on the rotor core；The rotor core is fixed on described
In rotating shaft, it includes some fan-shaped solid magnetic pole iron cores, and the rotor end plates, hinged bolts adopt non-magnet material, institute
Stating fan-shaped solid magnetic pole iron core two ends has some articulation holes；The rotor end plates are embedded with two pressure sensitivity pads, described in two
Pressure sensitivity pad is centrosymmetric relative to the axis hole at the rotor end plates center, and each pressure sensitivity pad one sector of correspondence is solid
Pole core；There are some screw areas in the rotor end plates, wherein each fan-shaped solid magnetic pole iron core of screw area correspondence one, use
The hinged bolts are fixed on the rotor end plates in the articulation hole at the fan-shaped solid magnetic pole iron core two ends；The pressure sensitivity
Pressure sensor device is housed in pad；The field frame assembly also includes external fan, outer shroud, end cap and outer cooler.
Preferably, the screw in the screw area has three floor, every layer of screw is located on same circular arc, from paraxial hole to distal shaft hole
Quantity be respectively 1,3,4, totally 8, wherein the screw institute being embedded with the middle of the screw area second row of the rotor end plates of pressure sensitivity pad
In the articulation hole of corresponding fan-shaped solid magnetic pole iron core, in the smooth side wall of the nearly axis hole dovetail groove, the swallow are carved with
Tail connected in star is built with pressure sensor piece.
Preferably, the pressure sensor piece answers any of both diaphragms of material piece, hydrostatic sensor for voltage inductance；
Its corresponding pressure sensor device of difference is piezoelectric transducer, hydrostatic sensor.
Preferably, the pressure sensor piece answers material piece for voltage inductance, the pressure sensor device is piezoelectric transducer, band
The nut lower surface of the corresponding hinged bolts of articulation hole of dovetail groove has copper facing, and the piezoelectric transducer is to the articulation hole
There is loop 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, also including automatic overvoltage power off device, the automatic overvoltage power off device includes signal receiving device, control
Device processed, relay；The signal receiving device can receive the pressure that the pressure sensor device sends loaded on the support
Signal, when the pressure signal for receiving exceedes the default rated value on the control device, by control device control it is described after
Electrical equipment cut-out motor is powered, to protect motor safety to run.
Preferably, the method for determining rated value as claimed in claim 7, comprises the following steps：
S1. manufacture has and the swallow-tail form ditch on the circular dies consistent with the articulation hole pore size and its wall
Groove shape groove of the same size；
S2. fixation pressure sensing chip in the groove in mould in step sl, and by pressure sensor piece and pressure sensing
Device connects, and by the external signal receiving device of pressure sensor device；
S3. pressurizeed to the inwall of the circular dies in step S1 with hydraulic press, the pressing mold of the hydraulic press only with
The pressure sensor piece is completely attached to, and is stopped 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 shows；The pressure is applied by hydraulic press
Plus pressure and the pressing mold of hydraulic press and the squish area of dovetail channel it is 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 body, the substantially the same magnetic conductivity with vacuum of magnetic conductivity of non-magnet material so that the leakage field at rotor block two ends is non-
Often little, 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 the big of the rotor sector solid magnetic pole centrifugal force in synchronizing motors unshakable in one's determination
It is little, rotor end plates thickness and hinged bolts diameter are designed by Strength co-mputation so that whole rotor forms one, improves forever
The strength and stiffness of magneto rotor assembly, it is to avoid rotor sector solid magnetic pole iron core easily causes motor because centrifugal force comes off
Interruption of service, and dovetail channel is provided with articulation hole side wall, and pressure sensitive device is fixed wherein, and to pressure sensitivity pad
In pressure sensor device send signal so that hinged bolts are by shearing force in whole system energy real-time monitoring solid magnetic pole
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, it is to avoid cause motor damage.
Description of the drawings
Fig. 1 is the first visual angle of the utility model leakproof magnet rotor schematic diagram.
Fig. 2 is the utility model rotor end plates structural representation.
Fig. 3 is the cross-sectional view of articulation hole of the utility model with swallow-tail form.
Fig. 4 is the utility model structural representation.
Specific embodiment
Embodiment one
As shown in Figure 1, Figure 2, Figure 3 shows, the utility model structure includes：Field frame assembly, leakproof magnet rotor 45；The stator is total
Into including：Support 46, stator core 44, stator coil, bearing assembling, the stator coil is embedded in stator core 44 and solid
Dingan County is mounted in support 46；The leakproof magnet rotor 45 includes：Rotor core 13, rotating shaft 11, rotor end plates 12, hinged bolts
14th, pressure sensitivity pad 23, winding；The winding is wound on the rotor core 13；The rotor core 13 is fixed on described turning
On axle 11, it includes 4 pieces of fan-shaped solid magnetic pole iron cores, and the rotor end plates 11, hinged bolts 14 adopt non-magnet material,
There are some articulation holes 15 at the fan-shaped solid magnetic pole iron core two ends；The rotor end plates 12 are embedded with two pressure sensitivity pads 23,
Two pressure sensitivity pads 23 are centrosymmetric relative to the axis hole at the center of the rotor end plates 12, and 23, each pressure sensitivity pad is right
Answer a fan-shaped solid magnetic pole iron core；There are some screw areas in the rotor end plates 12, wherein each one fan of screw area correspondence
The rotor end plates 12 are fixed on the fan-shaped solid magnetic pole iron core two by shape solid magnetic pole iron core with the hinged bolts 14
In the articulation hole 15 at end；Pressure sensor device 22 is housed in the pressure sensitivity pad 23；The field frame assembly also include external fan 43,
Outer shroud 32, end cap and outer cooler 41, outer cooler can be condenser pipe, it would however also be possible to employ recirculated cooling water.
More specifically, the screw in the screw area has three floor, and every layer of screw is located on same circular arc, from paraxial hole to remote
The quantity of axis hole is respectively 1,3,4, totally 8, wherein being embedded with the middle of the screw area second row of the rotor end plates 12 of pressure sensitivity pad 23
Screw 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 should also include hard filler built with pressure sensor piece, pressure sensor piece here,
To make pressure sensor piece be close to the inwall of articulation hole 32, make dynamometry more accurate.
More specifically, the pressure sensor piece answers material piece, the pressure sensor device 22 to be piezoelectricity biography for voltage inductance
Sensor, the nut lower surface of the corresponding hinged bolts of articulation hole 32 with dovetail groove 31 has copper facing, the piezoelectric sensing
To there is loop 24 between the hinged bolts in 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.
More specifically, also including automatic overvoltage power off device, the automatic overvoltage power off device includes that signal receives dress
Put 49, control device 47, relay 48；The signal receiving device 49 can receive the pressure sensing loaded on the support
The pressure signal that device 22 sends, when the pressure signal for receiving exceedes the default rated value on the control device 47, by
Control device 47 controls the cut-out motor of the relay 48 and powers, to protect motor safety to run.
Embodiment two
Based on the three-phase permanent-magnetic synchronous motors that the utility model is manufactured, rated power 500kw, rated voltage 6000v, volume
Determine electric current 51.6A, frequency 50HZ, 1000 revs/min of rotating speed.Rotor sector solid magnetic pole iron core external diameter Φ 500mm, rotor is fan-shaped
Solid magnetic pole iron core internal diameter（Magnetic shield external diameter）Φ 280mm, core length 590mm.
Rotor end plates adopt non-magnet material stainless steel, thickness 15mm, hinged bolts to adopt non-magnet material stainless steel,
Threaded portion M24, articulation hole smooth part Φ 25mm.
Rotor core two ends end plate and hinged bolts：
（1）, material be 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. per pole iron core position of centre of gravity：
RZ = 38.2（R3-r3）sinα/（R2-r2）α= 191.15mm
In formula：RZ------- is per pole rotor sector magnetic pole iron core position of centre of gravity；
R-------- is per pole rotor sector magnetic pole iron core exradius；
R-------- is per pole rotor sector magnetic pole iron core inner circle（Sleeve）Radius；
α --- ----sector center of circle half-angle.
B. per pole iron core centrifugal force：
F=Mv2/RZ=0.00112M RZ nN2=22032.3 ㎏=216060.3N
In formula：F-------- is per pole rotor sector magnetic pole iron core centrifugal force；
M-------- is per pole rotor sector magnetic pole iron core weight；
V------- position of centre of gravity linear velocities；
NN-------- motors（Rotor）Rotating speed.
C. hinged bolts shear strength is checked：
τ=F/8A=F/8（πr2L）=55MP≤[τ]
In formula：τ --- --- -- hinged bolts shear strengths；
The permitting stress of [τ] --- -- material；
The A-------- hinged bolts sections of shear；
RL-------- hinged bolts smooth part radiuses.
D. hinged bolts and end plate crushing strength are checked：
σ=F/8A1=F/8（dt）=72MP≤[σy]
In formula：σ --- --- -- hinged bolts and end plate crushing strength；
The permissible compression stress of [σ y] --- -- material；
A1-------- hinged bolts and end plate squish area；
D--------- hinged bolts diameters；
T--------- rotor end plates thickness.
Calculate by more than and find out, using 15mm thickness rotor end plates and 8 hinged bolts connections, fully meet rotor
The requirement of sector magnetic pole iron core centrifugal force during work.
Embodiment two
The method for determining default rated value in embodiment one, comprises the following steps：
S1. manufacture has and the swallow-tail form on the circular dies consistent with the pore size of the articulation hole 32 and its wall
The consistent groove of the shape size of groove 31；
S2. fixation pressure sensing chip in the groove in mould in step sl, and by pressure sensor piece and pressure sensing
Device 22 connects, and by the outer signal reception device 49 of pressure sensor device 22；
S3. pressurizeed with the inwall of circular dies described in hydraulic press to step S1, the pressing mold of the hydraulic press only with it is described
Pressure sensor piece is completely attached 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 of the display of the signal receiving device 49；The pressure is applied by hydraulic press
Plus pressure and hydraulic press pressing mold it is calculated with the squish area of dovetail channel 31.
The utility model preferred embodiment is these are only, therefore can not according to this limit the scope of the utility model enforcement, i.e.,
The equivalence changes made according to the utility model description and decoration, all should belong in the range of the utility model covering.
Claims (7)
1. a kind of high security magnetic-leakage preventing permagnetic synchronous motor, it is characterised in that：Structure includes：Field frame assembly, leakproof magnet rotor；
The field frame assembly includes：Support, stator core, stator coil, bearing assembling, the coil is embedded in stator core and solid
Dingan County is mounted in support；Loaded in the stator core, its structure includes the leakproof magnet rotor：Rotating shaft, rotor core, around
Group, rotor end plates, hinged bolts, pressure sensitivity pad, winding；The winding is wound on the rotor core；The rotor iron
Core is fixed in the rotating shaft, and it includes some fan-shaped solid magnetic pole iron cores, and the rotor end plates, hinged bolts are using non-
There are some articulation holes at permeability magnetic material, the fan-shaped solid magnetic pole iron core two ends；The rotor end plates are embedded with two pressure sensitivity pads
Piece, two pressure sensitivity pads are centrosymmetric relative to the axis hole at the rotor end plates center, and each pressure sensitivity pad correspondence
One fan-shaped solid magnetic pole iron core；There are some screw areas in the rotor end plates, wherein each screw area correspondence one is fan-shaped real
Heart pole core, the rotor end plates are fixed on the articulation at the fan-shaped solid magnetic pole iron core two ends with the hinged bolts
In hole；Pressure sensor device is housed in the pressure sensitivity pad；The field frame assembly also include external fan, outer shroud, end cap and
Outer cooler.
2. high security magnetic-leakage preventing permagnetic synchronous motor according to claim 1, it is characterised in that：The screw in the screw area
There are three layers, every layer of screw is located on same circular arc, and the quantity from paraxial hole to distal shaft hole is respectively 1,3,4, totally 8, wherein embedding
Have pressure sensitivity pad rotor end plates screw area second row in the middle of screw corresponding to fan-shaped solid magnetic pole iron core articulation hole
It is interior, dovetail groove is carved with the smooth side wall of the nearly axis hole, the dovetail groove is built with pressure sensor piece.
3. high security magnetic-leakage preventing permagnetic synchronous motor according to claim 2, it is characterised in that：The pressure sensor piece is
Voltage inductance answers any of both diaphragms of material piece, hydrostatic sensor；Its corresponding pressure sensor device of difference is pressure
Sensing device, hydrostatic sensor.
4. high security magnetic-leakage preventing permagnetic synchronous motor according to claim 3, it is characterised in that：The pressure sensor piece is
Voltage inductance answers material piece, and the pressure sensor device is pressure sensor device, the corresponding articulation of the articulation hole with dovetail groove
The nut lower surface of hole bolt has copper facing, and the pressure sensor device has loop between the hinged bolts.
5. high security magnetic-leakage preventing permagnetic synchronous motor according to claim 1, it is characterised in that：The pressure sensor
Power supply is built-in lithium battery or closing coil.
6. high security magnetic-leakage preventing permagnetic synchronous motor according to claim 1, it is characterised in that：The non-magnet material is
Copper, aluminium or stainless steel.
7. high security magnetic-leakage preventing permagnetic synchronous motor according to claim 3, it is characterised in that：Also include overvoltage from dynamic circuit breaker
Electric installation, the automatic overvoltage power off device includes signal receiving device, control device, relay；The signal receiving device
Loaded on the pressure signal that the pressure sensor device sends on the support, can be received, exceed in institute in the pressure signal for receiving
When stating default rated value on control device, the relay cut-out motor is controlled by control device and is powered, to protect motor to pacify
Row for the national games.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620969311.3U CN206117453U (en) | 2016-08-30 | 2016-08-30 | High security leak protection magnetism PMSM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620969311.3U CN206117453U (en) | 2016-08-30 | 2016-08-30 | High security leak protection magnetism PMSM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206117453U true CN206117453U (en) | 2017-04-19 |
Family
ID=58513437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620969311.3U Withdrawn - After Issue CN206117453U (en) | 2016-08-30 | 2016-08-30 | High security leak protection magnetism PMSM |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206117453U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130288A (en) * | 2016-08-30 | 2016-11-16 | 徐延平 | High security magnetic-leakage preventing permagnetic synchronous motor |
-
2016
- 2016-08-30 CN CN201620969311.3U patent/CN206117453U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130288A (en) * | 2016-08-30 | 2016-11-16 | 徐延平 | High security magnetic-leakage preventing permagnetic synchronous motor |
| CN106130288B (en) * | 2016-08-30 | 2019-06-21 | 徐延平 | High security magnetic-leakage preventing permanent magnet synchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170419 Effective date of abandoning: 20190621 |
|
| AV01 | Patent right actively abandoned |