Search found 701 matches

by major
Jan 02, 2018 12:22 pm
Forum: Electric Watercraft
Topic: Geared motor vs brushed
Replies: 7
Views: 243

Re: Geared motor vs brushed

You are comparing very different products. $109 brushed direct drive vs a geared BLDC at $1700. The prime objective of the costly system appears to be low mass whereas the other product is primarily low cost. The high 90's efficiency of the high speed BLDC seems overstated and you'd also have to acc...
by major
Jan 02, 2018 11:50 am
Forum: Motor Technology
Topic: MXUS copper wire coating damaged
Replies: 4
Views: 160

Re: MXUS lamination coating damaged

It appears, from photos, that you refer to a scrape or bare spot on the wire, not a damaged lamination. Laminations are thin steel plates stacked together to make the core. Coils of wire are wound or inserted onto or into slots in the laminated core. The coil wire is copper with a coating or film of...
by major
Dec 20, 2017 9:02 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Complete newbie wants to go EV racing - will it end in tears?
Replies: 24
Views: 508

Re: Complete newbie wants to go EV racing - will it end in tears?

You might check out some of the packages offered here. http://www.thunderstruck-ev.com/motorcycle-and-kart-kits/ Or give them a call or message. I think you can do better for your money than Golden. Also consider used equipment. Maybe a wrecked emc (electric motorcycle). I've never seen a happy Gold...
by major
Dec 20, 2017 1:16 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Complete newbie wants to go EV racing - will it end in tears?
Replies: 24
Views: 508

Re: Complete newbie wants to go EV racing - will it end in tears?

Hi Shedster,

I don't have much time now, but want to caution you on the motor. Look for a better one. Hopefully some members can offer suggestions.

Good luck,

major
by major
Dec 20, 2017 12:20 pm
Forum: E-Vehicles General Discussion
Topic: 218mph electric motorcycle is legit.
Replies: 10
Views: 427

Re: 218mph electric motorcycle is legit.

I was on the Lightning team in 2011 when we did the 218. {from: [major post_id=826739 time=1385503469 user_id=31634] Lightning ran as a partial streamliner (APS) and set the SCTA record at 215.960 mph at Bonneville in 2011 Speed Week. The record still stands and it was the first electric powered 2 w...
by major
Dec 19, 2017 8:46 am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Wiring of Turnigy Watt Meter with external shunt
Replies: 5
Views: 210

Re: Wiring of Turnigy Watt Meter with external shunt

Now, this is a picture of the external shunt: External Shunt.jpg One of the 2 thick black wires goes to the controller's minus pole, the other to the minus pole of the batteries. And the 2 thinner red wires (in between the black cables and one above the other) are connected to the 2 red wires of th...
by major
Dec 15, 2017 9:57 pm
Forum: Motor Technology
Topic: Axial Induction motor with no magnets.
Replies: 3
Views: 253

Re: Axial Induction motor with no magnets.

Axial air gap induction motors (and generators) have been around for a while although not too common. Here's a discussion: http://forums.aeva.asn.au/viewtopic.php?t=1966 Google brings up many other examples. And ferromagnetic cores are used because the material has a magnetic permeability of thousan...
by major
Dec 01, 2017 10:31 am
Forum: E-Bike Non-hub Motor Drives
Topic: Brushed motor. Rust on brush wire
Replies: 9
Views: 237

Re: Brushed motor. Rust on brush wire

Does this rust affect performance and or negativ impact on the motor? Or is it mainly aesthetically? i other word, not nice to look at :) RustyWire.jpg The copper wire coming from the brush does not rust. Rust is iron oxide. Corroded copper is green or blue-green in color. So if the substance on th...
by major
Oct 16, 2017 10:16 pm
Forum: Motor Technology
Topic: PMAC motor efficiency at low loads and or low RPM
Replies: 1
Views: 180

Re: PMAC motor efficiency at low loads and or low RPM

Greetings all, Excited to join this forum. I have a question that motor manufacturers have been tactfully avoiding and I want to know if it is an ignorant question to ask, or if they just don't want to spend the money, or if its just unnecessary. I have a Motenergy ME1305 5kW PMAC motor and a Sevco...
by major
Oct 13, 2017 8:22 am
Forum: Electric Watercraft
Topic: 50 HP electric outboard
Replies: 4
Views: 374

Re: 50 HP electric outboard

according to this https://endless-sphere.com/forums/memberlist.php?mode=viewprofile&u=50679 he last visited yesterday. My guess is he decided to commercialize it and asked someone to remove his threads. If this is the case, I don't think this should be allowed. Once you post an idea out there it's ...
by major
Oct 12, 2017 9:30 pm
Forum: Electric Watercraft
Topic: 50 HP electric outboard
Replies: 4
Views: 374

Re: 50 HP electric outboard

Looks like the thread was deleted or moved. I found a cached version. https://webcache.googleusercontent.com/search?q=cache:ZYwTi-sYAZcJ:https://endless-sphere.com/forums/viewtopic.php%3Ff%3D39%26t%3D90584+&cd=1&hl=en&ct=clnk&gl=us Thanks. User name was: smasterson2. Google that and you find a good...
by major
Oct 12, 2017 7:30 pm
Forum: Electric Watercraft
Topic: 50 HP electric outboard
Replies: 4
Views: 374

50 HP electric outboard

What happened to the thread about the guy making an electric outboard conversion using a 50 HP bldc? I think I had 3 or 4 posts there. And now no sign of it.

major
by major
Oct 11, 2017 5:26 pm
Forum: Electric Watercraft
Topic: 20HP Bow Thruster, 24VDC Battery Bank
Replies: 31
Views: 954

Re: 20HP Bow Thruster, 24VDC Battery Bank

Put a motor inverter near the 24V bank, right next to it if possible. This will produce 3 phase AC for the motor at whatever voltage the motor is designed for, perhaps 220V. The motor inverters used for machinery have control parameters for acceleration, deceleration and reversal as well as control...
by major
Aug 15, 2017 7:03 am
Forum: Large EV General Discussion
Topic: Electric Tractor
Replies: 2
Views: 289

Re: Electric Tractor

Forklift, tractor, tug. Low speed high force type vehicle. Something where mass (weight) works to your advantage. Locomotive. Hoist. Crane. Excavator.
by major
Jun 29, 2017 8:00 am
Forum: Motor Technology
Topic: New motor design
Replies: 5
Views: 687

Re: New motor design

Maybe another member can enlighten me about that graph. Not sure why he uses force instead of torque but it doesn't really matter for the point he is making. The 2 force vs angle graphs are a bit different than the standard ones you generally see in the literature but the bottom graph is force vs c...
by major
Jun 24, 2017 5:37 am
Forum: Motor Technology
Topic: New motor design
Replies: 5
Views: 687

Re: New motor design

Interesting. Most of what he relates is well known and currently used. Slip rings and winding on the rotor of a motor operating in reluctance mode is a new one on me. Typically they rely on rotor salient steel shape with stator only excitation. Another strange point is the force/angle graph. I assum...
by major
Apr 07, 2017 9:10 am
Forum: Motor Technology
Topic: John Deere E-Gator
Replies: 2
Views: 353

Re: John Deere E-Gator

Hi Martin, Those motors, 6.6" dia. Wound field golf cart motors, are intended for OEM use and not marketed to general public. Therefore the information you seek is not published. It is available only to the company engineering departments. For the motor companies, it is more trouble than it's worth ...
by major
Apr 06, 2017 12:12 am
Forum: E-Bike Technical
Topic: Range - Continuous - C rate Battery
Replies: 6
Views: 321

Re: Range - Continuous - C rate Battery

... Did not work because I used 18S1P - .Motor did not turn. Contacting from GNG, He mentioned that motor would need at least 10A to start. ... So you said you had a 60V kit. Perhaphs 18S (72V) was too high for the controller and that prevented it from starting. It would seem to me that your batter...
by major
Mar 31, 2017 7:54 am
Forum: Battery Technology
Topic: Voltage Bosch tools battery 18v?? Helppp
Replies: 2
Views: 165

Re: Voltage Bosch tools battery 18v?? Helppp

Hi please need some help to finish my ebike !! I juste bought bosch liion 18v 5ah battery. But my voltmeter read 36v between plots + an -. How do i get 18v with that ?? And seems there s no gnd plot. Please juste need to fix that before first run !! Sounds like a voltmeter problem. A photo of the m...
by major
Mar 26, 2017 9:50 pm
Forum: Battery Technology
Topic: How do you cut copper bar without a guilotine?
Replies: 9
Views: 338

Re: How do you cut copper bar without a guilotine?

A band saw set up for metal works. Also an angle grinder with abrasive cut-off wheel.
by major
Mar 05, 2017 12:36 am
Forum: Battery Technology
Topic: New Chargery BMS24
Replies: 12
Views: 808

Re: New Chargery BMS24

Thanks AW......
by major
Mar 04, 2017 11:25 am
Forum: Battery Technology
Topic: New Chargery BMS24
Replies: 12
Views: 808

Re: New Chargery BMS24

wow.. that tool look very interesting!.. 24s ! ? PRICE? WHERE TO BUY ? Doc Hey Doctor Bass Here is the website....http://www.chargery.com/ The price was $216 US including shipping and all the accessories...I am not sure of how to set up a relay so that a charger can work and set up another relay fo...
by major
Feb 09, 2017 12:03 pm
Forum: Motor Technology
Topic: Australia to lose a new electric engine to silicon valley
Replies: 8
Views: 634

Re: Australia to lose a new electric engine to silicon valle

..Or maybe Ozzie investors are smart enough to realise that a 30kg hub motor was never going to be a success ? I'll second this. How many times have automotive wheel motors been promised and failed to deliver? This particular design has nothing super outstanding to suddenly become a success in car ...