1 / 8

2. Linear motors compared to other technologies

2. Linear motors compared to other technologies. 2.1. Linear motors compared to rotating servo motors 2.2. Linear motors compared to other technologies. Definition: Linear servo motor (linear motor): Linear electromagnetic direct drive device for positioning in industrial applications.

zlhna
Download Presentation

2. Linear motors compared to other technologies

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 2. Linear motors compared to other technologies 2.1. Linear motors compared to rotating servo motors 2.2. Linear motors compared to other technologies Definition: Linear servo motor (linear motor): Linear electromagnetic direct drive device for positioning in industrial applications Picture: SKF Picture: Transrapid Linear servo motors for industrial applications Linear motors for transportion

  2. 2.1 Linear motors compared to rotating servo motors (1) The possibility of ‘linear gears’ are limited F2 := M / l2 lever l2 F1 := M / l1 l1 M F1/F2 = l2/l1 Force and velocity can not easy easily be interchanged as through a gearbox in rotating drives transmissions. • If an application needs more force, then a bigger motor has to be selected.

  3. 2.1 Linear motors compared to rotating servo motors (2) • No gear box  there is a direct interconnection between linear motor and the process (direct drive). No gear box  no problems with gear boxes (friction, backlash, life limitations, etc.) • No gear box  Special functions: linear motors can be used for movements as well as for sensing force. The motor current can be used for quality control (see application). •  A linear motor is more than just a positioning system. „assembling with feeling“  Linear motors used as sensors!

  4. 2.1 Linear motors compared to rotating servo motors (3) In linear motor technology there are two option about which component should be moved.In the principle the component (slider or stator) which has the lower mass would be prefered. (maximize acceleration rate of system) Moved slider Moved stator Use only High flex extension cable Note: stator: part with the coil system (active part) slider: part with the magnets (passive part)

  5. 2.2. Linear motors compared to other technologies(1) • The state of the art motion technology and its applications are complex and very multifaceted. A general comparison between technogies is very difficult and more often not ‚correct‘. • Expressions like „Technology A is better than Technologie B“ are not acceptable from a technical point of view. • Important is that the user knows about all technologies and is able to select the right solution for his specific application. • The following diagram show different motion technogies compared against each other. There are always exceptions but the graphs show the relative strenghts of each technology:

  6. 2.2. Linear motors compared to other technologies(2) Rotating Motor Rotating Motor Flexibility Flexibility Hydraulic Hydraulic Pneumatic Pneumatic Cam Cam Dynamic Force Force Cam Rotating Motor Flexibility Hydraulic Hydraulic Rotating Motor Pneumatic Pneumatic Cam Dynamic “complexity”

  7. 2.2. Linear motors compared to other technologies(3) Rotating Motor Rotating Motor Flexibility Flexibility Hydraulic Hydraulic Pneumatic Pneumatic Cam Cam Dynamic Force Force Cam Rotating Motor Flexibility Hydraulic Hydraulic Rotating Motor Pneumatic Pneumatic Cam Dynamic “simplicity”

  8. 2.2 Conclusions • Linear motors have the same outstanding control performance as rotating servo motors. • Linear motors are direct drives and have the advantage of simplicity, life time, zero backlash, high dynamic, transmission noise and compliance factors are negated (Force and position feedback). • Linear motors don‘t replace other motion technologies but supplement other technologies through their specialities.

More Related