CN1141775C - Directly driven synchronous dragger with Nd-Fe-B permanent magnetic rotor - Google Patents

Directly driven synchronous dragger with Nd-Fe-B permanent magnetic rotor Download PDF

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Publication number
CN1141775C
CN1141775C CNB011132566A CN01113256A CN1141775C CN 1141775 C CN1141775 C CN 1141775C CN B011132566 A CNB011132566 A CN B011132566A CN 01113256 A CN01113256 A CN 01113256A CN 1141775 C CN1141775 C CN 1141775C
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CN
China
Prior art keywords
stator
rotor
shroud
external rotor
permanent magnetic
Prior art date
Application number
CNB011132566A
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Chinese (zh)
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CN1324139A (en
Inventor
谭�娃
谭茀娃
金如麟
朱昌明
曾晓东
董隆予
Original Assignee
上海交通大学
上海交大高新技术股份有限公司
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Application filed by 上海交通大学, 上海交大高新技术股份有限公司 filed Critical 上海交通大学
Priority to CNB011132566A priority Critical patent/CN1141775C/en
Publication of CN1324139A publication Critical patent/CN1324139A/en
Application granted granted Critical
Publication of CN1141775C publication Critical patent/CN1141775C/en

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Abstract

The present invention relates to a synchronous traction machine with a directly-driven neodymium-iron-boron permanent magnet outer rotor. A multipole outer rotor structure is used, the outer rotor is simultaneously used as a brake wheel, a traction wheel is fixed on the outer rotor, and the special design of the electromechanical unification of the traction wheel, the brake wheel and the motor outer rotor causes the structure to be very compact and can cancel a gear to realize direct drive; a special two-layer annular stator structure not only enhances running reliability, but also obviously improves manufacturability. The present invention has the advantages of stable raise, flat-layer precision, etc., uses two sets of braking members to realize high stop reliability and is an ideal new-generation special drive device for elevator traction at present. The technology of the present invention can be popularized to all occasions with the requirement of low-speed direct drive.

Description

Directly drive synchronous dragger with Nd-Fe-B permanent magnetic rotor
Technical field:
The present invention relates to a kind of external rotor synchro traction machine, the synchronous dragger with Nd-Fe-B permanent magnetic rotor that relate in particular to a kind of field orientation control, directly drives is the special-purpose drive unit of a kind of modem elevator traction, belongs to the electric department technical field of motors.
Background technology:
Along with the development of urban construction, increasing skyscraper emerges, and is also more and more higher to the requirement of modem elevator, requires the elevator traction machine volume little and in light weight, with the minimizing machine room area, even need not machine room.In the prior art, elevator traction machine generally adopts the asynchronous traction machine of conventional stator variable voltage speed control, or the variable-frequency control asynchronous motor of VVVF power supply, satisfies big torque demand by mechanical reduction gear.And these asynchronous traction machine bands of the prior art heavy geared system, can not adapt to the requirement of express elevator to passenger's comfort, vibration, noise and langding accuracy.
Document " Gearless direct drive for Elevators without a Machine Room " (Dr-IngRalf Gfrorer, Lift-report 24.Jahrg.1998.Heft 5) introduced a kind of shellring shape stator structure, in this structure, the interior ring that plays the outer shroud of support effect, the middle ring that plays fixed stator effect unshakable in one's determination and a support rotating part is integrated.There is following defective in the structure of this traction machine: when traction sheave bore a heavy burden, external rotor took place eccentric, can cause between stator and rotor air gap inhomogeneous, when serious even can cause the stall of motor.The stator structure of this shellring shape, not only cutting output is big, and is difficult to unit stator iron core pressing and rolls off the production line, and processability of product structure is poor.In addition, it is only in the one-sided brake component that is equipped with, the poor reliability of braking.
Summary of the invention:
The objective of the invention is to above-mentioned deficiency at prior art, design provides a kind of direct driving synchronous dragger with Nd-Fe-B permanent magnetic rotor of novelty, the geared system that cancellation is heavy, make it compact conformation, security of operation is steady, satisfying the new demand of modem elevator, and can with this traction technological transformation in the past traditional traction technology and extend to elevator all occasions that need low speed directly to drive such as motor, escalator drive motors of opening the door.
For realizing such purpose, in the technical scheme of the present invention, adopted multipole outer-rotor structure, the yoke of external rotor is both as the magnetic circuit that is configured to motor of salient pole magnet steel, also as the fixed support of traction sheave, simultaneously external rotor when power-off brake also directly as braked wheel.The salient pole magnet steel that the inner surface of external rotor mounts adopts high performance Nd-Fe-Bo permanent magnet material.
Motor stator adopts two layers of unique loop configuration; stator inner loop is promptly as the support of fixed armature winding and stator core; again as the support of bearing; the stator outer shroud then plays the effect of motor case and end cap; the end of protection stator coil; avoid directly contacting, also install simultaneously and use for brake with the external rotor of rotation.The outer interannular of stator inner loop and stator adopts fabricated construction.The armature winding adopts the fractional slot winding structure, and flume structure is adopted in stator core, with effective minimizing torque pulsation and location torque, guarantees that traction machine still can smooth operation under low speed.
Design adopts two to overlap independently that brake component participates in applying braking force to braked wheel among the present invention, to guarantee that when any cover component failure, traction machine can both make the elevator stopping of nominal load, realizes the stop high reliability.
The present invention adopts the special converter power supply, and by photoelectric encoder detection in real time and feedback rotor position information, thereby control stator current vector all the time on the q axle, make permagnetic synchronous motor obtain the control characteristic the same with DC motor---linear mechanical property, regulating characteristics and good starting characteristic.
Compact conformation of the present invention, have that torque is big, loss is little, noise is low, vibration is little, lifting is steady and advantage such as flat bed is accurate, energy is significantly energy-conservation and dwindle erection space, realizes the elevator(lift) machine room miniaturization, is at present desirable elevator traction special use drive unit of new generation.The technology of the present invention can be promoted and be used for elevator all occasions that need low speed directly to drive such as motor, escalator drive motors of opening the door.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Among Fig. 1,1 is external rotor, and 2 is yoke, and 3 is the salient pole magnet steel, and 4 is traction sheave, and 5 is that stator inner loop, 6 is armature winding, and 7 for stator core, 8 is a bearing, and 9 is the stator outer shroud, and 10 is brake arm, and 11 is the little axle of motor.
Fig. 2 is the end view of structure of the present invention.
Among Fig. 2,1 is external rotor, and 9 is the stator outer shroud, and 10 are the aperture of brake arm, 12 for opening on the external rotor, and 14 is that electromagnet, 15 is the compression spring, and 16 is screw rod, and 17 is brake strip.
Embodiment:
For understanding technical scheme of the present invention better, describe in further detail below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present invention.
As shown in the figure, the present invention adopts multipole outer-rotor structure, and the yoke 2 of external rotor 1 is both as the magnetic circuit that is configured to motor of salient pole magnet steel 3, also as the fixed support of traction sheave 4, external rotor 1 when power-off brake also directly as braked wheel.Internal stator adopts two layers of loop configuration, is made up of stator inner loop 5, stator core 7, armature winding 6 and stator outer shroud 9.Traction sheave 4 is fixed on the external rotor 1, and connects into integral body with external rotor.Stator and rotor support by bearing 8, guarantee the gap, smooth operation.9 employing fabricated constructions of stator inner loop 5 and stator outer shroud are fixed with brake arm 10 on the stator outer shroud 9, stator outer shroud 9 is simultaneously as motor case and end cap, and the little axle 11 of motor is used to install photoelectric encoder.
Fig. 2 is the end view of structure of the present invention.
As shown in the figure, the present invention is equipped with two and overlaps independently brake component, comprise brake arm 10, electromagnet 14, compression spring 15 and screw rod 16, brake arm 10 is installed in the moving fulcrum place of both sides, stator outer shroud 9 lower end, between brake arm 10 and the external rotor 1 brake strip 17 is arranged as braked wheel, have aperture 12 on the external rotor 1, electromagnet 14, compression spring 15 and screw rod 16 are installed in stator outer shroud 9 tops, and compression spring 15 links to each other with brake arm 10.
The aperture of opening on the external rotor 1 12 both can be used as the usefulness of heat dissipation ventilation, can be used as when sudden power the point of application of manpower moving elevator again.Brake strip 17 adopts special-purpose friction plate, the coefficient of friction height, and do not contain asbestos, can satisfy environmental requirement.
During normal operation, special converter is powered to armature winding, and the main field that this armature field and external rotor magnet steel 3 produces interacts and produces electromagnetic torque, drives the traction machine rotation, and the steel wire rope by traction sheave 4 places moves up and down car.
When starting, electromagnet 14 energisings, its suction has overcome the pressure of spring 15, and brake strip 17 and external rotor 1 are disengaged.After the stator energising, motor brings into operation.When motor stopped, electromagnet 14 outages produced braking moment by spring pressure between friction plate 17 and external rotor 1, make elevator stopping.
In the embodiments of the invention, adopted inner surface to mount the outer-rotor structure of 20 blocks of salient pole magnet steel (20 utmost points), magnet steel has adopted the Nd-Fe-Bo permanent magnet material with high residual magnetic flux density, high-coercive force and high energy product, and adopts radial magnetizing.The high air gap flux density and the big arm of force have satisfied the demand of motor big torque when low speed, thereby can cancel gear, realize directly driving.Rotor yoke had both constituted the motor magnetic circuit, also as the support of traction sheave, played the effect of braked wheel simultaneously when braking.The special construction of the dynamo-electric unification of this traction sheave, braked wheel and motor outer rotor makes structure of the present invention compact especially, has significantly reduced volume and weight.
Two layers of annular stator structure of uniqueness of the present invention are compared with shellring shape structure, not only simplify the structure, and repeatedly set sub-iron core and stator winding installation when being convenient to make, thereby significantly improved manufacturability, and when traction machine bears a heavy burden, can not change air gap between stator, rotor and cause mal-operation, improve maintainability.
Armature winding of the present invention has adopted the fractional slot winding structure, and every extremely every phase groove is counted q=3/4, and promptly per 4 utmost points are formed a unit motor.The oblique vertically tooth pitch of stator core, the salient pole magnet steel adopts the surface to paste the technology of going into, and suitable polar arc width and non-uniform gap, thereby has reduced stator-induced electromagnetic gesture and stator current harmonic wave effectively, and reduced the pulsation of torque, reduced location torque.Selected for use the incremental optical-electricity encoder of 4096 pulses of 20 utmost point revolutions accurately to feed back rotor position information in addition, thereby guaranteed that traction machine (quite still can smooth operation under the rotating speed of frequency f=0.167Hz) at extremely low 1rpm.
The present invention adopts the special converter power supply, and by photoelectric encoder detection in real time and feedback rotor position information, thereby control stator current vector all the time on the q axle, realize field orientation control and High Power Factor running, make permanent magnet synchronous motor have the control characteristic the same with DC motor---linear mechanical property, regulating characteristics and good starting characteristic.This all has fairly obvious meaning to the langding accuracy of raising elevator and the comfort of elevator passenger.The external rotor inner surface mounts the structure of magnet steel simultaneously, can make full use of the magnet steel area, improve air-gap flux, reduce the number of turn of armature winding, q axle magnetic resistance is big in addition, thereby has reduced quadrature axis armature reaction reactance, stator leakage reactance and quadrature axis synchronous reactance, has improved power factor, especially motor power factor cos φ ≈ 1 during underloading, this is that asynchronous machine institute is incomparable.

Claims (4)

1, a kind of direct driving synchronous dragger with Nd-Fe-B permanent magnetic rotor, it is characterized in that adopting multipole outer-rotor structure and two layers of annular stator structure, external rotor (1) inner surface mounts salient pole magnet steel (3), the yoke (2) of external rotor (1) is both as the magnetic circuit that is configured to motor of salient pole magnet steel (3), also as the fixed support of traction sheave (4), internal stator is by stator inner loop (5), stator core (7), armature winding (6) and stator outer shroud (9) are formed, traction sheave (4) is fixed on the external rotor (1), fixed, rotor supports by bearing (8), adopt fabricated construction between stator inner loop (5) and the stator outer shroud (9), be fixed with brake arm (10) on the stator outer shroud (9), between brake arm (10) and the external rotor (1) brake strip (17) is arranged as braked wheel, electromagnet (14), compression spring (15) and screw rod (16) are installed in stator outer shroud (9) top, brake arm (10) is installed in the moving fulcrum place of stator outer shroud (9) both sides, lower end, compression spring (15) links to each other with brake arm (10), and the little axle of motor (11) is gone up photoelectric encoder is installed.
2,, it is characterized in that the salient pole magnet steel (3) that external rotor (1) inner surface mounts adopts high performance Nd-Fe-Bo permanent magnet material as the said a kind of direct driving synchronous dragger with Nd-Fe-B permanent magnetic rotor of claim 1.
3, as the said a kind of direct driving synchronous dragger with Nd-Fe-B permanent magnetic rotor of claim 1, it is characterized in that armature winding (6) adopts the fractional slot winding structure, flume structure is adopted in stator core (7).
4, as the said a kind of direct driving synchronous dragger with Nd-Fe-B permanent magnetic rotor of claim 1, it is characterized in that having on the external rotor (1) aperture (12).
CNB011132566A 2001-07-05 2001-07-05 Directly driven synchronous dragger with Nd-Fe-B permanent magnetic rotor CN1141775C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB011132566A CN1141775C (en) 2001-07-05 2001-07-05 Directly driven synchronous dragger with Nd-Fe-B permanent magnetic rotor

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Application Number Priority Date Filing Date Title
CNB011132566A CN1141775C (en) 2001-07-05 2001-07-05 Directly driven synchronous dragger with Nd-Fe-B permanent magnetic rotor

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CN1141775C true CN1141775C (en) 2004-03-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100421874C (en) * 2007-01-15 2008-10-01 大连光洋科技工程有限公司 Vertical and horizontal dual-purpose single axle table of AC permanent magnetic synchronization external-rotor-type force moment motor drive
CN100467208C (en) * 2007-01-15 2009-03-11 大连光洋科技工程有限公司 Double axle table of AC permanent magnetic synchronization external-rotor-type force moment motor drive

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1326312C (en) * 2002-06-04 2007-07-11 上海三菱电梯有限公司 Gearless permanent-magnet synchronous traction machine
CN102185414B (en) * 2011-04-01 2013-09-25 喻连生 Low-speed outer rotor permanent magnet drive device with rotating speed of outer cylinder being 0.001r/min-30r/min
CN102515001A (en) * 2011-11-30 2012-06-27 日立电梯(中国)有限公司 Elevator tractor
CN104118785B (en) * 2014-07-01 2016-04-20 常熟市佳能电梯配件有限公司 Permanent magnetism drives towing machine by force
CN104539098A (en) * 2014-12-31 2015-04-22 布劳恩电梯有限公司 Outer rotor permanent magnet synchronous tractor for elevator
CN105245077A (en) * 2015-11-04 2016-01-13 迪百仕电机科技(苏州)有限公司 Outer rotor permanent magnet synchronous motor having bearings fixed on enclosure
CN105437227B (en) * 2015-12-28 2017-10-24 苏州大学 Selective compliance assembly robot arm and its control system
CN105449935B (en) * 2015-12-28 2018-03-20 苏州大学 External rotor electric machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100421874C (en) * 2007-01-15 2008-10-01 大连光洋科技工程有限公司 Vertical and horizontal dual-purpose single axle table of AC permanent magnetic synchronization external-rotor-type force moment motor drive
CN100467208C (en) * 2007-01-15 2009-03-11 大连光洋科技工程有限公司 Double axle table of AC permanent magnetic synchronization external-rotor-type force moment motor drive

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