CN1387300A - Synchronous gearless permanent-magnet draw machine - Google Patents
Synchronous gearless permanent-magnet draw machine Download PDFInfo
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- CN1387300A CN1387300A CN 02109831 CN02109831A CN1387300A CN 1387300 A CN1387300 A CN 1387300A CN 02109831 CN02109831 CN 02109831 CN 02109831 A CN02109831 A CN 02109831A CN 1387300 A CN1387300 A CN 1387300A
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- Cage And Drive Apparatuses For Elevators (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A permanent magnet synchronous towing machine without gear wheel includes the stator, rotor and the brake equipment. The stator frame, the stator case and the shoring cover are cast as a whole. Arc type permanent magnets are affixed to the inner side of the rotor wall along the direction of circle. Shaft is mounted on the axle hole of the axle housing of the rotor. The iron cords are pressed to the outer side of the shorting cover along direction of the circle. The rotation coder is positioned on the back end of the shaft. The stretch type electromagnetic brake providing thrust in bi-directional is mounted between two brake arms on the base. The brake shoes with hinge jointed on the brake arms are fitted on the symmetrical two sides of the outer wall of the rotor. The towing wheel is fixed on the circular bead of the end part.
Description
Technical field
The present invention relates to the traction machine that a kind of elevator drive system is used, particularly a kind of gearless permanent-magnet synchronous traction machine that is applicable to that small room and machine-roomless lift traction drive.This machine can be widely used in other and need low-speed big operation occasion.
Background technology
Traditional elevator drive system mainly adopts motor (induction machine) to drive the kind of drive of reductor, not only transmission efficiency is low for it, and because the existence of reductor, the volume of whole drive system is increased, the transmit force that is system can density reduce, the defective that exists of reducer gear self simultaneously, many technical problems such as the low-speed stability that requires to drive system, mechanicalness noise are brought bad influence.
Along with the development and the Design of PM Motor improvement of Manufacturing Technology of modern control theory and technology, the elevator traction Driving technique has also obtained developing rapidly.The gearless machine that adopts permasyn motor direct to connect driving has obtained practical application.Compare with the conventional asynchronous traction machine, permanent magnetic synchronous traction machine has been cancelled gear reduction box, the gearless that has realized elevator directly drives, improved the transmission efficiency of system greatly, reduce the entire system volume, and drive system is being improved aspect the runnabilities such as vibration, noise and low-speed stability.Gearless permanent-magnet synchronous traction machine finally replaces tradition has the asynchronous traction machine of gear to become the inevitable development trend that elevator traction drives.
According to relevant documents and materials introduction, what the type traction machine adopted all is the discrete group component.Its primary structure is:
(1) support shell, stator core fixed mount and rotating shaft bracing frame are to be combined by a plurality of separating components;
(2) the fixedly employing of rotor and traction sheave assembling connection form is with the support of traction sheave as rotor, by Bolt Connection, rotor is fixed on the traction sheave, and traction sheave should transfer torque support rotor rotation again;
(3) brake arm of brake component and brake block are fixing whole coupling components;
(4) rotary encoder assembling casing outside.
Deficiency and the defective brought by its structure are as follows:
(1) with regard to support, the combining structure of separating component increases mechanical processing difficulty relatively, the manufacturability more complicated.The accuracy tolerance requirement that this should guarantee fitted position between each parts guarantee shape, the position tolerance of associated components again, and assembly precision and concentricity is difficult to assurance.Particularly adopt the assembling draw bail, not only parts are many, and physical dimension increases relatively, increase manufacturing cost, and the overall mechanical strength reduction, will influence complete machine serviceability and useful life.
(2) the fixedly employing of rotor and traction sheave assembling connection form makes the globality variation of traction machine, and concentricity is lower, and traction machine can't be worked when serious.When changing traction sheave, need complete machine to separate, assembly precision is difficult to guarantee.More because of the assembling connecting mode of traction sheave with axle, make the centre of support of traction sheave center of effort and fore bearing apart from increase, the bending strength of axle reduces, in case bolt looseness, brake fade, traction machine can't be worked, and can cause the accident in the time of seriously.
(3) the overall fixed draw bail of brake arm and brake block, not only requirement on machining accuracy height, assembly quality are poor, and are difficult to adjust when brake block and braked wheel loose contact, influence braking effect.
(4) encoder is assemblied in the support outside, and the complete machine structure size is increased, and encoder is exposed externally, damages easily.
The elevator traction drive system is made up of traction machine and control system thereof, how further to improve traction machine power energy density, reduce the traction machine volume, make it to satisfy small room even do not have the machine room needs, and reduce whole traction drive system cost, become the important topic and the new expectation of engineers and technicians' research.
Summary of the invention
The gearless permanent-magnet synchronous traction machine that the purpose of this invention is to provide a kind of efficient, high force-energy density external rotor structure, its compact conformation, good manufacturability, easy to process, volume is little, and the air-gap field harmonic content is little, and noise is low, and low cruise is steady, the reliability height.When improving traction machine efficient, also can reduce the control system frequency inverter capacity, reduce whole traction drive system cost.
The object of the present invention is achieved like this: this device comprises stator, rotor and brake apparatus thereof, wherein support and stator casing, support set is cast integral body, radius parallel magnetization arc-shaped permanent magnets such as the periphery wall inner circumferential stickup of rotor, rotating shaft is packed in the axis hole of rotor axle sleeve, unit stator iron core pressing is on the support set periphery of stator casing, stator casing and rotor are linked together by bearings, and be positioned at stator casing in the rear end of rotating shaft and assemble rotary encoder, be provided with the brake arm of brake shoe respectively in the both sides of support, the bidirectional propulsion electromagnetism is opened a sluice gate brake and is placed between upper part of the frame two brake arms, the brake shoe that is hinged on the brake arm coincide contact in the periphery wall symmetry both sides of rotor, and traction sheave is packed on the rotor tip shoulder.
Said stator iron core and rotor permanent magnet are not isometric structure, and rotor permanent magnet is longer than stator core 3%～15%.
Employing waits the rotor permanent magnet of radius parallel magnetization arcuate structure, and pole embrace is 0.75～0.95.
Stator winding adopts fractional slot winding, the oblique 0.5-1.5 of a stator core stator tooth distance.
Because the present invention adopts the rotor permanent magnet outer-rotor structure longer slightly than stator core, so significantly improve the power energy density of traction machine; Under the identical load torque, reduced the frequency converter output current effectively, reduce traction drive system cost.Traction machine brake sticking brake wheel and the integrated casting structure of external rotor, traction sheave and brake sticking brake wheel are fixed together, and open a sluice gate simple in structure, the reliable braking system of the common formation of brake with the bidirectional propulsion electromagnetism.Radius parallel magnetization arcuate structures such as rotor permanent magnet employing evenly stick on rotor periphery wall inboard, and pole embrace is 0.75～0.95, has improved the air-gap field waveform effectively; Stator iron core chute and stator winding adopt fractional-slot, have weakened the air-gap field harmonic content effectively, have improved the traction machine running stability.Support and stator casing, support set are cast integral body, and unit stator iron core pressing is on the support set periphery of stator casing, and stator casing is the fixed support of stator, is again the bearing supporting frame of support rotor.Therefore, its bulk strength height is easy to processing, and good manufacturability once is installed and just can finishes whole processing, and shape, a position tolerance guarantee that easily reduced coupling components, the overall structure size is little, and compact conformation, machine add cost reduction.The monolithic construction of rotor, braked wheel and rotor supports axle sleeve, make rotor structure simpler, reliability and manufacturability are higher, particularly on the support sleeve bearing are housed, when the effect of traction machine holding capacity and output torque, make stress point and strong point moment reduce, structure stress is more reasonable, and the compound assembly structure of support sleeve and rotating shaft, make the integral bending height of machine shaft, rigidity is big, and the final assembly performance is good, and globality is strong.Traction sheave only as parts independently, is fixedly connected on the unitary rotor end shoulder as braked wheel, and promptly on the outer wheel hub of rotor supports axle sleeve, convenient disassembly does not influence the former assembling performance of complete machine, reliability height.
The brake arm of brake portion and brake shoe adopt articulated manner, are easy to regulate, and be easy to assembly, effective, and braking reliability height.
Encoder adopts built-in, and the rear end that encoder is installed in rotating shaft is positioned at stator casing, and encoder has obtained protection, be difficult for because of transportation, carrying damage, and the physical dimension of complete machine reduces greatly.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described.
Fig. 1 is a kind of concrete structure schematic diagram of the present invention.
Fig. 2 is the end view of Fig. 1.
Fig. 3 is the rotor magnetic pole structural representation.
Embodiment
Describe concrete structure of the present invention in detail according to Fig. 1-3.This device comprises stator, rotor and brake apparatus thereof, and wherein support 1 is cast integral body with stator casing 6, support set 12, and its specification shape should be looked concrete instructions for use and be determined.The periphery wall 9 of rotor, end shoulder 11, axle sleeve 14 3 parts are cast integral body, and are same, and its specification shape also should be looked concrete instructions for use and be determined.Radius parallel magnetization arc-shaped permanent magnets 7 such as the periphery wall 9 inner circumferential stickups of rotor, its pole embrace is 0.75～0.95.Rotating shaft 2 one ends are packed in rotor axle sleeve 14 axis holes, and the other end utilizes bearing group to be contained in the bearing holder (housing, cover) 4.Stator core 5 is fitted on support set 12 peripheries of stator casing 6.Stator and rotor are in the same place by bearing 13 support and connection.Wherein stator winding adopts fractional slot winding, the oblique 0.5-1.5 of a stator core stator tooth distance.Stator core 5 and rotor permanent magnet 7 are not isometric structure, and rotor permanent magnet 7 is longer than stator core 5 about 3%～15%.Be positioned at stator casing 6 in the rear end of rotating shaft 2 and be assembled with rotary encoder 3.According to the traction machine standard, the braking system of traction machine must be equipped with two independently brake components, and when a side lost efficacy, the brake component of opposite side can satisfy the requirement that makes the traction machine retarding braking.Therefore, be provided with the brake arm 15 of brake shoe 16 respectively in the both sides of support 1, the bidirectional propulsion electromagnetism is opened a sluice gate brake 8 and is placed between two brake arms 15 of support 1 top, is hinged on brake shoe 16 on the brake arm 15 and contacts symmetrical both sides at rotor periphery wall 9 identically, constitutes reliable braking system.Traction sheave 10 is packed on the rotor tip shoulder 11.
An embodiment of the present invention is 1 ton of a traction machine rated load, hoisting velocity 1.75m/s, 2: 1 windings of traction sheave hang.In this example, Capstan rotor permanent magnet 7 is than the long 5mm of stator, and employing waits the Nd-Fe-B permanent magnet of radius parallel magnetization, and pole embrace is 0.93; The every extremely every phase groove number of stator winding employing is 1.2 fractional slot winding, and oblique 1 the stator tooth distance of stator core has weakened the air-gap field harmonic content effectively, has guaranteed that the traction machine low cruise is steady; Traction machine power energy density height, the close 1.15T that reaches of air-gap field first-harmonic magnetic; The traction machine volume is little, and is in light weight, and P/C is than excellent.
The present invention also can be widely used in other and need low-speed big operation occasion, and can adopt different modes of braking respectively according to different operating modes, as power-off brake, to electric braking, clutch and the braking of disc type plane etc., to satisfy the requirement of driving device.
Claims (4)
1, a kind of gearless permanent-magnet synchronous traction machine, comprise stator, rotor and brake apparatus thereof, it is characterized in that: support and stator casing, support set is cast integral body, radius parallel magnetization arc-shaped permanent magnets such as the periphery wall inner circumferential stickup of rotor, rotating shaft is packed in the axle sleeve axis hole of rotor, unit stator iron core pressing is on the support set periphery of stator casing, stator casing and rotor are linked together by bearings, and be positioned at stator casing in the rear end of rotating shaft and assemble rotary encoder, be provided with the brake arm of brake shoe respectively in the both sides of support, the bidirectional propulsion electromagnetism is opened a sluice gate brake and is placed between upper part of the frame two brake arms, the brake shoe that is hinged on the brake arm coincide contact in the periphery wall symmetry both sides of rotor, and traction sheave is packed on the rotor tip shoulder.
2, permanent magnetic synchronous traction machine according to claim 1 is characterized in that: the stator core of motor and rotor permanent magnet are not isometric structure, and rotor permanent magnet is longer than stator core 3%～15%.
3, permanent magnetic synchronous traction machine according to claim 1 is characterized in that: employing waits the rotor permanent magnet of radius parallel magnetization arcuate structure, and pole embrace is 0.75～0.95.
4, permanent magnetic synchronous traction machine according to claim 1 is characterized in that: stator winding adopts fractional slot winding, the oblique 0.5-1.5 of a stator core stator tooth distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109831 CN1387300A (en) | 2002-06-11 | 2002-06-11 | Synchronous gearless permanent-magnet draw machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109831 CN1387300A (en) | 2002-06-11 | 2002-06-11 | Synchronous gearless permanent-magnet draw machine |
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| Publication Number | Publication Date |
|---|---|
| CN1387300A true CN1387300A (en) | 2002-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02109831 Pending CN1387300A (en) | 2002-06-11 | 2002-06-11 | Synchronous gearless permanent-magnet draw machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161455A (en) * | 2011-02-28 | 2011-08-24 | 沈阳博林特电梯股份有限公司 | Gearless permanent-magnet synchronous driving motor used for escalator |
| CN101098194B (en) * | 2007-07-20 | 2011-09-28 | 北京大学 | Wide-angle income fiber receiving method for space light |
| CN102515001A (en) * | 2011-11-30 | 2012-06-27 | 日立电梯（中国）有限公司 | Elevator tractor |
| CN103395675A (en) * | 2013-07-30 | 2013-11-20 | 广西正源电机有限公司 | Permanent-magnet synchronous traction machine |
| CN108025882A (en) * | 2015-08-31 | 2018-05-11 | 奥的斯电梯公司 | Optical encoder and electric motor assembly |
| CN112253436A (en) * | 2020-09-23 | 2021-01-22 | 安徽正良环保节能科技有限责任公司 | Air compressor machine braking system |
| CN112436636A (en) * | 2021-01-28 | 2021-03-02 | 瑞昌市森奥达科技有限公司 | Permanent magnet motor and oil pumping device using same |
-
2002
- 2002-06-11 CN CN 02109831 patent/CN1387300A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098194B (en) * | 2007-07-20 | 2011-09-28 | 北京大学 | Wide-angle income fiber receiving method for space light |
| CN102161455A (en) * | 2011-02-28 | 2011-08-24 | 沈阳博林特电梯股份有限公司 | Gearless permanent-magnet synchronous driving motor used for escalator |
| CN102515001A (en) * | 2011-11-30 | 2012-06-27 | 日立电梯（中国）有限公司 | Elevator tractor |
| CN103395675A (en) * | 2013-07-30 | 2013-11-20 | 广西正源电机有限公司 | Permanent-magnet synchronous traction machine |
| CN108025882A (en) * | 2015-08-31 | 2018-05-11 | 奥的斯电梯公司 | Optical encoder and electric motor assembly |
| US10396635B2 (en) | 2015-08-31 | 2019-08-27 | Otis Elevator Company | Reflective optical encoder with contaminant protection |
| CN108025882B (en) * | 2015-08-31 | 2020-01-03 | 奥的斯电梯公司 | Optical encoder and motor assembly |
| CN112253436A (en) * | 2020-09-23 | 2021-01-22 | 安徽正良环保节能科技有限责任公司 | Air compressor machine braking system |
| CN112436636A (en) * | 2021-01-28 | 2021-03-02 | 瑞昌市森奥达科技有限公司 | Permanent magnet motor and oil pumping device using same |
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