1892

Item 1892

OTHER: Electrical - Motor - Stator - Wire

General:

Wire Gauge and Current Limits. "The Maximum Amps for Chassis Wiring is also a conservative rating, but is meant for wiring in air, and not in a bundle. For short lengths of wire."See: Access database - Motor - Table - Wire Gauge & Form - Stator Winding.

Compare the vales for wire size on Why are Fuses and Solenoid Disconnects So Important in EV's? with the values for cabinets on Wire Gage and Current Limits. The cabinet values are 3 times more conservative than those in the EV article.

The wire I bought to test the 'phaseless motor idea' was 1 lbs of 19 AWG. ~ 0.0359 " dia.

Have bought 1 lb of 24 AWG for Rick to test to destruction.

Lee's Electronics carries 30 AWG 14 AWG (0.0641" dia.) to 30 AWG (0.01" dia.) in stock

4.2.10 Armature Line Current Density. [Source ~ PMMT p.132]

4.2.11 Armature Winding Current Density. [Source ~ PMMT p.133]

Note re Litz wire: The density is based on the area of the wire(s) and not on the circumference of the wire(s).

Figure 4.6

4.2.12 Armature Winding Resistance. [Source ~ PMMT p.133]

4.2.13 Armature Winding Inductance. [Source ~ PMMT p.134]
Litz wire calculator:

Litz wire:

See; DESIGN: Electrotor-SloMo ~ Motor - Axial Flux - Stator - Wire

Definition: http://en.wikipedia.org/wiki/Litz_wire

Eddy current loss is controllable with stranded Litz wire, leading to an efficiency greater than 97%. ~ http://www.tip.csiro.au/Machines/papers/iwscem/index.html

Some useful information on Litz wire - charts show various strand quantities for different operating frequencies, O.D. of wire, guage, wt. resistance/1000 ft etc Saved in removable E-drive as Round_Litz_2B72407.pdf

Look more into the Litz wire and the twisting of it.

This appears to be the way to go. See; Ironless wheel motor for a direct drive vehicle application. http://www.itee.uq.edu.au/~walkerg/publications/2003/114%20Greaves%20full%20paper.pdf Have hard copy

Would the dense packing of the Litz wire combined with a reduced gap, due to the straight sides of the wire be significant. Particularly in removing the need for a laminated or soft magnetic Composite (SMC)?

Supplier of Litz wire:

Pack Feindrähte

E-Bay:

http://shop.ebay.fr/?_from=R40&_trk...-All-Categories

Electrically Connecting the Ends of Litz wire:

Litz wire soldering:

Professional method:

Soldering Litz Wire

Square Shaped Wire:

Inside the HVH™ Hybrid Motor Have hard copy.

Carbon Nanotube:

Definition: http://en.wikipedia.org/wiki/Carbon_nanotubes#Electrical

Thoughts:

Wire Coating: If the coating on the wire is approximately the same thickness for all AWG then with coils of small wires the coating will be taking up a greater proportion of the space that is being used for the wrapped coil.

Outside Web Pages:

Skin Effect: Since the PWM will be at a high frequency also see Litz Wire.

Related Page - This Site:

Electrotor-SloMo - Motor - Axial Flux - Stator - Wire

Last Revised: July 22, 2010