CN201374595Y

CN201374595Y - Gearless low-speed large-torque permanent magnet motor

Info

Publication number: CN201374595Y
Application number: CN200920115953U
Authority: CN
Inventors: 陈震民
Original assignee: ZHEJIANG ZHONGYUAN ELECTRIC CO Ltd
Current assignee: ZHEJIANG ZHONGYUAN ELECTRIC CO Ltd
Priority date: 2009-03-19
Filing date: 2009-03-19
Publication date: 2009-12-30
Anticipated expiration: 2019-03-19

Abstract

The utility model discloses a gearless low-speed large-torque permanent magnet motor, consisting essentially of a low-speed permanent magnet motor, an electricity loss brake and a coder, wherein a winding of a stator iron core of the low-speed permanent magnet motor adopts 72 grooves 20 poles wire winding and a distributed short-pitch winding with pitch being 3; the stator iron core which is embedded with the short-pitch winding is compressed into a machine seat; an iron core support plate is welded at two ends of a rotor iron core; the center hole of the iron core support plate penetrates through a shaft and is welded therewith; the surface of the rotor iron core is averagely distributed according to 20 poles and is fastened with a magnetic steel by a bolt; the machine seat, into which the stator iron core is compressed, and is internally provided with the shaft that contains a front bearing and a back bearing; the back bearing is fixed in the bearing room of a back end cover by the internal cover of the back bearing and the external cover of the back bearing; the back end cover is fixedly connected with the back end of the machine seat by the bolt; the front bearing is fixed in the bearing room of a front end cover by the external cover of the front bearing and the internal cover of the front bearing; and the front end cover is fixed at the front end of the machine seat. The gearless low-speed large-torque permanent magnet motor can work at a very low velocity, thereby ensuring the output with zero speed and rated torque, reducing maintenance cost of equipment, improving service efficiency of the equipment, having the advantages of obvious energy saving effect, high speed adjusting precision, small volume, light weight and strong commonality, and being applicable to various industries with higher speed adjusting precision.

Description

Anodontia low speed large torque moment permanent-magnet motor

Technical field

The utility model relates to a kind of anodontia low speed large torque moment permanent-magnet motor, belong to the mechanical transmission technical field.

Background technology

Traditional machine driven system is mainly formed by frequency converter, asynchronous machine and gear box combination; this transmission system efficiency is low, noise is big, leakage of oil, adjusting speed accuracy is low, reliability is low; phenomenons such as gear polishing often appear in the gear box that is adopted; so want frequent shutdown inspection; work such as apply oil fat; make the maintenance cost of equipment improve, operating efficiency descends.In the prior art, motor when low cruise especially synchronous machine have apparent in view pulsation, common synchronous machine is with the output that can not satisfy big torque under the lower situation of V/F control model frequency band, even starting difficulty.

Summary of the invention

The deficiency that is to overcome the prior art existence of the present utility model, and provide a kind of change mechanical transmission structure in the past, remove mechanical driving parts such as gear box, the maintenance cost of reduction equipment and preventive maintenance time, enough big moment of torsion is arranged when guaranteeing the motor low cruise simultaneously, the anodontia low speed large torque moment permanent-magnet motor of nominal torque output is arranged when comprising zero rotating speed equally.

The purpose of this utility model is finished by following technical solution, it mainly is made up of low-speed permanent-magnet motor, electricity loss brake and encoder, it is 3 distributed short-chord winding that the winding of the stator core of wherein said low-speed permanent-magnet motor adopts 72 grooves, 20 utmost points coilings, pitch, embedding has the stator core of short-chord winding to be pressed in the support, one supporting bracket unshakable in one's determination is welded on the two ends of rotor core, and the centre bore of described supporting bracket unshakable in one's determination passes axle and weld company with axle; The surface of described rotor core is evenly distributed by 20 utmost points and is fastened with magnet steel with screw.

Be incorporated with the axle that is mounted with fore bearing and rear bearing in the described support that is pressed into stator core; Described rear bearing is fixed in the bearing room of back top cover with rear bearing inner cap and rear bearing enclosing cover, and the rear end cover screw is fixedlyed connected with the support rear end; Described fore bearing is fixed in the bearing chamber of front end housing with fore bearing enclosing cover and fore bearing inner cap, and front end housing is fixed on the front end of support.

Described rear end cap is equipped with electricity loss brake, and is added with a joint rear bearing enclosing cover at electricity loss brake and rear end cap with the centre.

The rear end of described electricity loss brake is equipped with encoder, and described encoder axle is connected with the axle of described low-speed permanent-magnet motor, and in support the axial flow blower that has fan housing is installed also.

Technique effect of the present utility model is: it has used advanced servo position control system to make that motor can be in very low speed operation, and can guarantee that zero velocity has the output of nominal torque to save mechanical driving parts such as reductor, has reduced cost of equipment maintenance and has improved the equipment service efficiency.20 utmost points simultaneously motor pole number have been increased to, since the increase of number of poles effectively overcome motor especially synchronous machine in low cruise, pulse and the magnetic resistance phenomenon, and the stator winding pitch of motor shortened to 3, reduce the end height of stator winding, made efficiency of motor that tangible lifting arranged.Through testing and prove by the scene energy-saving effect of the big torque motor of the anodontia low-speed permanent-magnet of this series in the customers' place: efficiency eta=0.94, powerfactorcos=0.96 is removed reductor and can be improved system effectiveness 8%; The adjusting speed accuracy height: the speed governing error has improved the technological level and the class of application industry product 1/100000; The noise index is less than with seat No. asynchronous machine 10%; Volume is little in light weight; Highly versatile: identical with the surface structure and the installation dimension of AC induction motor, can directly substitute asynchronous machine and reductor; Can be used for the higher every profession and trade of requirement adjusting speed accuracy, as: radar system for tracking in textile chemical fiber printing and dyeing, metallurgical steel rolling, rubber tyre, float glass (containing the glass bottle), printing packaging machinery, the military industry and ship power drive.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is done detailed introduction: shown in Figure 1, the utility model mainly is made up of low-speed permanent-magnet motor, electricity loss brake and encoder, it is 3 distributed short-chord winding that the winding of the stator core 11 of wherein said low-speed permanent-magnet motor adopts 72 grooves, 20 utmost points coilings, pitch, embedding has the stator core 11 of short-chord winding to be pressed in the support 6, one supporting bracket unshakable in one's determination is welded on the two ends of rotor core 8, and the centre bore of described supporting bracket unshakable in one's determination 7 passes axle 1 and weld company with axle; The surface of described rotor core 8 is evenly distributed by 20 utmost points and is fastened with magnet steel 9 with screw.

Be incorporated with the axle 1 that is mounted with fore bearing 3 and rear bearing 15 in the described support 6 that is pressed into stator core 11; Described rear bearing 15 usefulness rear bearing inner caps 13 and rear bearing enclosing cover 16 are fixed in the bearing chamber of rear end cap 14, and rear end cap 14 usefulness screws are fixedlyed connected with support 6 rear ends; Described fore bearing 3 usefulness fore bearing enclosing covers 2 and fore bearing inner cap 5 are fixed in the bearing chamber of front end housing 4, and front end housing 4 is fixed on the front end of support 6.

Described rear end cap 14 is equipped with electricity loss brake 17, and is added with a joint rear bearing enclosing cover 16 at electricity loss brake 17 and rear end cap 14 with the centre.

The rear end of described electricity loss brake 17 is equipped with

encoder

18, and 18 of described encoders are connected with the axle of described low-speed permanent-magnet motor, and the axial flow blower 19 that has fan housing also is installed in support.

The present invention utilizes the Position Control mode of servo-control system, and the methods such as the winding of permanent magnet synchronous motor and rotor magnetic steel arrangement of improving simultaneously are with the requirement of satisfying the output of drive apparatus low speed high torque and the phenomenon that overcomes the synchronous machine low-speed pulse.The external form of motor is all applied mechanically Y series asynchronous standard, and it helps economical with materials and popularization and exchange, and power is from 22kW-180kW, and torque is from 800-4500Nm, and rotating speed is from 150-250rpm, series.

With the 30KW.250M support is example: anodontia low speed large torque moment permanent-magnet servomotor: the torque of 30KW is anodontia low speed large torque moment permanent-magnet servomotor is 1146N.m, rotating speed is 250rpm, stator core 11 windings adopt the coiling of 72 grooves, 20 utmost points, pitch is 3 distributed short-chord winding 12, the end height of the short more winding of pitch is low more, winding is an effective edge stator core 11 inside, winding is an invalid edges stator core 11 outsides, the short more invalid edges in end is just short more, the shortening of invalid edges can reduce the idle current of motor, finally reaches the effect that improves electric efficiency.By the coil-inserting method of distributed winding short-chord winding 12 is embedded stator cores 11 and be pressed in the support 6, supporting bracket 7 unshakable in one's determination is welded to the two ends of rotor core 8, then the centre bore of supporting bracket 7 unshakable in one's determination is passed spool 1, and weld with axle 1.Then magnet steel 9 is evenly distributed by 20 utmost points and magnet steel 9 is fastening with rotor core 8 surfaces, can adds seccotine on the composition surface of magnet steel 9 and rotor core 8 in case of necessity with stainless steel screw 10.The axle bearings at both ends shelves of the tape spool rotor of having finished magnet steel technology are put fore bearing 3 and rear bearing 15, put into then and pressed in the casing of stator core, load onto rear end cap 14 and rear bearing 15 usefulness rear bearing inner caps 13 and rear bearing enclosing cover 16 are fixed in the bearing chamber of rear end cap 14.With screw rear end cap is fixedlyed connected with support 6 rear ends.Load onto front end housing 4 then and fore bearing 3 usefulness fore bearing enclosing covers 2 and fore bearing inner cap 5 are fixed in the bearing chamber of front end housing 4.Finish after the installation of low-speed permanent-magnet motor again with electricity loss brake 17, brake is installed is in order to prevent that motor from can stop timely in catastrophic failure or when losing external power source electric power suddenly, be installed in rear end cap 14 outsides, because the brake disc of brake needs smooth rubbing surface, so in the middle of brake and rear end cap, will add a bearings enclosing cover 16, with the brake disc that guarantees brake good rubbing surface is arranged, can well brake when meeting accident.At last encoder 18 (servo feedback system with) is installed in the brake rear end and the axle of encoder 18 will be connected with the shaft rear end of low-speed permanent-magnet motor, concentric with assurance encoder and motor shaft, have the fan housing of axial flow blower 19 on the cover, finish the installation of complete machine.

Claims

1, a kind of anodontia low speed large torque moment permanent-magnet motor, it mainly is made up of low-speed permanent-magnet motor, electricity loss brake and encoder, it is 3 distributed short-chord winding that the winding that it is characterized in that the stator core (11) of described low-speed permanent-magnet motor adopts the coiling of 72 grooves, 20 utmost points, pitch, embedding has the stator core (11) of short-chord winding to be pressed in the support (6), one supporting bracket unshakable in one's determination is welded on the two ends of rotor core (8), and the centre bore of described supporting bracket unshakable in one's determination (7) passes axle (1) and weld company with axle; The surface of described rotor core (8) is evenly distributed by 20 utmost points and is fastened with magnet steel (9) with screw.

2, anodontia low speed large torque moment permanent-magnet motor according to claim 1 is characterized in that being incorporated with the axle (1) that is mounted with fore bearing (3) and rear bearing (15) in the described support (6) that is pressed into stator core (11); Described rear bearing (15) is fixed in the bearing chamber of rear end cap (14) with rear bearing inner cap (13) and rear bearing enclosing cover (16), and rear end cap (14) is fixedlyed connected with support (6) rear end with screw; Described fore bearing (3) is fixed in the bearing chamber of front end housing (4) with fore bearing enclosing cover (2) and fore bearing inner cap (5), and front end housing (4) is fixed on the front end of support (6).

3, anodontia low speed large torque moment permanent-magnet motor according to claim 2 is characterized in that described rear end cap (14) is equipped with electricity loss brake (17), and electricity loss brake (17) and rear end cap (14) with the centre be added with one the joint rear bearing enclosing cover (16).

4, anodontia low speed large torque moment permanent-magnet motor according to claim 3, the rear end that it is characterized in that described electricity loss brake (17) is equipped with encoder (18), described encoder (18) axle is connected with the axle of described low-speed permanent-magnet motor, and the axial flow blower (19) that has fan housing also is installed in support.