Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Permanent magnet direct driving type explosion-proof variable frequency adjustable-speed motor combined type driving system

A variable frequency speed regulating motor, permanent magnet direct drive technology, applied in the direction of electric components, magnetic circuit rotating parts, and control/drive circuit connection, can solve the problem of reducing the performance of permanent magnet synchronous motors, raw materials are not reproducible, The electromagnetic disturbance of the surrounding system is large, so as to weaken the demagnetization effect, facilitate large-scale promotion and application, and reduce the effect of electromagnetic disturbance

Pending Publication Date: 2017-06-13
CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both drive systems require a reducer to transmit energy and increase torque, which greatly increases the complexity of the system, reduces the efficiency of the system, and increases the cost of the system
[0004] Among these two application systems, the former system is more dispersed, which leads to the complexity of the cooling system of each unit; and each unit needs independent explosion-proof performance design, resulting in bulky size and high cost; at the same time, due to the Power cables need to be connected, resulting in greater electromagnetic disturbance to surrounding systems
For the latter drive system with frequency conversion and speed regulation integrated machine and reducer, due to the combination of frequency converter and asynchronous motor, the size, cost and electromagnetic disturbance are reduced to a certain extent, but because the asynchronous motor is still used as the drive unit, the system power The factor is still low, and reducers and gearboxes are still needed for energy transmission and torque improvement, resulting in increased system losses, low overall machine efficiency, and large system maintenance
[0005] In addition, because the conventional permanent magnet synchronous motor needs to rely on rare earth permanent magnet materials, its price cost is too high, and the raw materials are not renewable
If the ferrite permanent magnet material is directly used, the performance of the existing conventional permanent magnet synchronous motor will be greatly reduced
Although the existing permanent magnet reluctance motor has got rid of the dependence on rare earth materials, it is prone to demagnetization in structure, especially when the motor is heavily loaded, the demagnetization situation is more serious, and the existing permanent magnet reluctance The motor is less efficient
In view of the above problems, those skilled in the art try new solutions always, but this problem has not been properly solved

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Permanent magnet direct driving type explosion-proof variable frequency adjustable-speed motor combined type driving system
  • Permanent magnet direct driving type explosion-proof variable frequency adjustable-speed motor combined type driving system
  • Permanent magnet direct driving type explosion-proof variable frequency adjustable-speed motor combined type driving system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: see figure 1 , figure 2 , a permanent magnet direct drive type explosion-proof frequency conversion motor combined drive system, the drive system includes a permanent magnet direct drive motor 1, a frequency converter 2, an explosion-proof casing 3 and a water-cooled pipeline composition 4, the frequency converter 2, The motor 1 is arranged up and down, the water-cooling pipeline is dispersed in the explosion-proof casing, the water circuit is connected in series as a whole, the frequency converter part includes a power part and a control part; the permanent magnet direct drive motor includes a rotating shaft 29, a rotor core 25, Ferrite permanent magnet 27, stator winding 23, stator iron core 21 and housing base, the rotor iron core 25 passes through the rotating shaft in the form of stacked punching sheets, permanent magnet installation grooves are evenly distributed in the rotor iron core, the The ferrite permanent magnet is glued in the permanent mag...

Embodiment 2

[0026] Example 2: see figure 2 , as an improvement of the present invention, wherein the even number of magnetic poles in the permanent magnet installation groove, the permanent magnets of each pole are arranged in an isosceles trapezoid without sealing, and there is an isosceles trapezoidal wind tunnel between each pole, that is, an air magnetic barrier 28. The isosceles trapezoidal wind tunnel is symmetrically distributed on the quadrature axis of the rotor rotating coordinate system. The side of the isosceles trapezoid close to the rotating shaft is the upper bottom, and the side close to the stator is the lower bottom, and the lower bottom and the air gap Not connected. This design ensures the structural rigidity of the rotor on the basis of ensuring the ventilation. The rest of the structures and advantages are exactly the same as in Embodiment 1.

Embodiment 3

[0027] Embodiment 3: see figure 2 , as an improvement of the present invention, the height of the air magnetic barrier 28 is greater than the width of the permanent magnet installation groove 26, and the upper bottom of the air magnetic barrier 28 does not exceed the permanent magnet installation groove. The rest of the structures and advantages are exactly the same as in Embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a permanent magnet direct drive type explosion-proof variable frequency adjustable-speed motor combined type driving system. The driving system is characterized in that the driving system comprises a permanent magnet direct drive motor, a frequency converter, an explosion-proof housing and water-cooled pipelines, the frequency converter and the motor are distributed up and down, the water-cooled pipelines are scattered in the explosion-proof housing, the water pipelines are overall in series connection, and the frequency converter part comprises a power part and a control part; since a permanent magnet direct drive type driving mode is adopted, a reducer unit is omitted, the load is driven directly, the system driving component is simplified, moreover, the permanent magnet direct drive motor improves the system power coefficient, excitation loss is reduced, and the whole-machine efficiency is improved. Meanwhile, since the system components are less, the maintenance amount is lowered, and the reliability is improved.

Description

technical field [0001] The invention relates to a drive system, in particular to a permanent magnet direct-drive explosion-proof variable-frequency variable-speed motor combined drive system, which belongs to the field of motors and electrical appliances. Background technique [0002] The inverter motor drive system used in the explosion-proof environment is limited by space and electromagnetic environment, and it is expected to have a small volume, simple drive system, good electromagnetic compatibility, and high efficiency inverter motor drive system. [0003] The frequency conversion speed regulation system used in the explosion-proof environment is mostly composed of an explosion-proof inverter unit, an asynchronous motor unit, a reducer unit, and a load unit, or an explosion-proof asynchronous motor integrated unit unit, a reducer unit unit, and a load unit. Monomer composition. Both drive systems require a reducer to transmit energy and increase torque, which greatly ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02K11/33H02K5/20H02K1/32H02K1/27H02M7/00
CPCH02K1/2766H02K1/32H02K5/20H02M7/003
Inventor 谭国俊杨波李浩刘毅平修远张玉成郭爱
Owner CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com