Motors and the Current State of Motion Technology
Post on 13-Jul-2015
212 Views
Preview:
Transcript
Motors and the Current State of Motion Technology
This webinar will be available afterwards at
designworldonline.com & email
Q&A at the end of the presentation
Hashtag for this webinar: #DWwebinar
Before We Start
Moderator
Miles Budimir Design World
Presenter
Dan Jones Incremotion Associates
Motors and the Current
State of Motion Technology
Dan Jones
Incremotion Associates
Combination of:
New Motors
New Power Devices
New Software Tools
New Controller IC’s
New Feedback Devices
Newly Emerging Technology
“Motion Control”
6
Most motor technologies were developed as theoretical
types at least 20 years before they began to move into
production.
7
Some motor technologies awaited the need of new
applications and/or new drive and control developments.
8
The emergence of new needs and new applications drives
the development of new motor technologies.
9
Energy savings (higher motor efficiencies)
Electric replacing pneumatic and hydraulic applications
Weight savings
More torque (torque-weight density)
More power (power density)
New Needs
10
Aircraft pumps and actuators (electric)
Hybrid and electric vehicles
Handheld portable electric tools
Battlefield and household robots
Medical diagnostic machines (MRI, PET, CAT, etc.)
Medical powered prosthetics (arms, wrists, ankles, knees, etc.)
New Applications
11
There are 3 major classes of controlled motion:
1. Constant speed
2. Variable speed
3. Variable position
Motors in Controlled Motion
12
Various Motor Types – CD-adapco (SPEED)
13
Radial air gap (induction, PM brushless & SR)
Axial air gap or axial flux
Transverse flux
Basic Motor Configurations
14
15
Axial Air Gap Motor
16
Synchronous Reluctance Motor
17
18
Yasa Axial Flux – High Power Density Motor
Winner of the Drayson Racing FIA World Land Speed
Record at 204 mph
Axial Flux Motors – Version 1
19
Axial Flux Motor
20
21
22
In hub motors for electric bikes, electric scooters
PM generators (direct drive)
Rotary industrial tables
Robots (waist and elbow)
Automotive starter/generators
Applications (Axial Flux)
23
Advantages o High power density
o Very high power efficiency
o Can be fluid cooled
Disadvantages o Very high rotor inertia
o Complex lamination structure
o High RE magnet weight
Axial Flux Motors
24
Controlling the PM Motor’s Magnetic field by using
magnetic flux from an Exciter.
Focusing on the motors speed to achieve the widest speed
range possible.
The i-Motor Technology – Japan (Ver. 2)
25
Field changeable magnet excitation motor
Changes in magnetization results in variable field strength
that leads to a wide range of motor shaft speeds
Smart control techniques can lead to higher power
efficiencies over a wide speed range
i-Motor Performance Features
26
27
28
29
A wide range of variable speed applications are achievable that include:
Electric vehicles
Pumps
Fans
Compressors
Textile machines
Spindles in machine tools
Food equipment (bottling, labeling, handling)
Oil, chemical and gas processing
Pulp and paper processing
Many others
i-Motor Application Opportunities
30
Advantages o Use ferrite magnets
o Widest speed range
o Lowest cost
o Lower inertia with gearbox decouple
Disadvantages o Needs gearbox
o Pancake shape limits drop in replacements
i-Motor Axial Flux Motor
31
ABB IE4 Efficiency Synchronous Reluctance Motor
32
33
34
35
36
Advantages o No magnets
o Uses conventional inverter drives
o Higher torque density than induction motors
o Higher power factor
o Wide constant power vs. speed range
o Brushless
Disadvantages o Complicated rotor construction
o Non-linear torque vs. current
o Complicated control algorithm
Synchronous Reluctance Motor
37
First paper by Professor Weh in 1988.
Only academia with very large computers could simulate the magnetic action of this motor.
PC based motor simulation programs did not become available until the mid-1990’s and they were not initially very friendly.
It is a 3 phase brushless PM motor type.
Transverse Flux Motor History
38
39
40
41
42
43
44
Advantages o Highest torque – weight density
o Highest continuous torque per volume
o Low internal losses
o Simplest winding (coil)
Disadvantages o Limited speed (< 1000 rpm)
o Complicated construction
Transverse Flux Motors
45
New motor developments continue
Development driven by new applications and needs
Higher power density motors now appearing
New motors in development for ever higher power efficiencies
More new motor developments to come
Conclusions
46
Questions?
Design World Miles Budimir mbudimir@wtwhmedia.com Phone: 440.234.4531 Twitter: @DW_Motion
Incremotion Associates Dan Jones djones9352@aol.com Phone: 805.496.2621
Thank You
This webinar will be available at designworldonline.com & email
Tweet with hashtag #DWwebinar
Connect with
Discuss this on EngineeringExchange.com
top related