Endless Sphere

GMAC + Phaserunner is the only one that ticks all the boxes. Direct Drive won't be nearly as efficient as the GMAC/MAC is below about 18 MPH on a 20" rim. Winding counts won't change that. You'll have to run about 22-24 MPH before the efficiency of a Direct Drive is higher than the GMAC. Effici...

Every generation of golden motor internal controller seems prone to early failure... and basically every internal controllered hub motor has had this same problem.. so i'd subtract some bang/buck units for that. The external controller motors are great because they have more thermal mass than most ...

With just about any electric motor pole switching speed plays a huge part of efficiency. It starts at 0 RPM where efficiency is zero. BLDC motors can't pack enough poles to be efficient in a hubmotor envelope to be very efficient below 150 RPM or so, and even then aren't anywhere close to their peak...

I ride on the Magic Pie 5 rear hub motor with internal controller. See it here... https://goldenmotor.bike/product/magic-pie-5-vector-26-inch-rear-conversion-kit/ It welcomes a 52 volt nominal battery. (but expect a skewed battery indicator if you use the BAC-601 display or throttle LEDs) Click the...

I have two MAC motors, both in the 4500+ mile range, (both driven with Phaserunners). One consumed about twice as much power over its life. I recently tore it down to replace the gear/clutch set. Both of them slowly increased gear noise after about 1000 miles. By about 2500 miles I opened them, look...

As for comfort on longer rides it doesn't get any better than this.

NTCE will track only the left leg input of the rider stroking it. It measures the rider torque directly and accurately, for the left leg. Most folks pedal with pretty equal power between left-right. I'm among the 1% who don't (and still prefer the NTCE). The NTCE is very accurate and stable; can't c...

There is a slight lag as it switches from Hall to FOC mode on a MAC. Otherwise equal to a 12 FET Infineon.

My MAC 10T has over 5000 trouble free miles.

The presence of water (or any electrolytic fluid) will wreak havoc on bearings in a motor. They already endure a tough life living inside a constantly changing magnetic field that turns them into tiny ion pumps. On large AC motors the armature bearings can literally weld themselves to the armature i...

Internal vs external depends a bit on the hub. All internals tend to reach scaleback temps a little earlier, some more than others. Golden motors Magic Pie and Magic Pie Edge have included a clever forced air cooling and have done a pretty good job with isolating heat transfer conductive and convect...

We've been running MAC10T's with well over 3500 miles on each of them on trikes. Gears & clutch still in great shape, despite pushing them sometimes for sustained 1500 watt runs. I've heard some issues in the past with geared hubs on mountain bikes that get some airtime with the wheels. Not sure...

Triketech...I used two of these hose clamps when I hung my 14s4p battery on the bottom side of my down tube: https://www.mcmaster.com/catalog/126/334/ McMaster is my "Engineering Mall", I've had an account for many years now. Here's an early image of what I'm planning. http://www.triketec...

FWIW, I'd recommend Mobil SHC 100 grease in a MAC if you have it apart. Not worth opening the motor to change the grease IMO. I got the SCH 100 recommendation from the engineers at Mobil. Same as Mobil 28 except it has a lithium soap thickener instead of a clay thickener that is in the Mobil 28. Ti...

Just in case I haven't mentioned it, the MAC will produce more torque per amp than any motor currently available which means better acceleration than any motor available :wink: ...that is why I am a huge MAC fan. Sure. torque per amp will be very high on any very slow winding motor. An equivalently...

Sun makes a variety of trikes from upright to recumbent in both delta and tadpoles. It would help to know which one you're choosing. As for stability, mount the battery low with about 5-6" ground clearance as close to the centerline front-rear as possible. May need to offset a bit to clear chai...

Program the Bafang to 18A rather the 25A peak and you should be fine.

Shear pins are not a roadside fix without a vise.

Assume a powerful mid-drive, at least 1000W rated, 3-5000W peak driving the pedal drivetrain at the BB, capable of shearing those pins at 130 N.m Absolutely. The BBS02 at 750 watt/25A setting is a stretch and with full throttle off the line along with hard pedaling will sheer the pins; maybe not th...

Nice ride!

We've got a pair of Scorpion FS26's with MAC power. Getting to the time of year that we either have to ride in the evening or early morning at sunrise.

A few pics on this page:
http://www.triketech.com/Drivetrain/Pow ... AC-V2.html

You will want a good suspension system and long wheebase, HPV FS26 or Azub Ti Fly. Just like on a bike speeds over about 30 mph on bumpy roads are pretty unstable. I ride an HPV FS26 with a 1500 watt MAC and its pretty stable on 50 mph downhill runs. Bike tires aren't designed for speeds above 50 mp...

2. This one is harder to explain, but basically, the more resistance you have on a motor as a percentage of you power, the more heat you generate. So all motors if clamped to stand still will eventually melt given enough power. So say your hill (well, you and your bike on the hill) is creating a 20...

Flexible halfshafts will be the big challenge. If anything was suspended on a Delta Trike, I think its probably more practical to keep a live axle with long trailing arms mounted just behind the Bottom Bracket and a panhard rod for lateral stability. Or just go with Fat tires. They do improve the ri...

Efficiency of a BLDC (or any electric motor) drops at low speeds. At 0 RPM no matter how much power you throw at it above 0 Watts, the efficiency is..........Zero. Bike wheels don't rotate all that fast; indeed a 20" rolls faster than a 26" but we're dealing with what, 150-300 RPM typicall...

3500 miles on a MAC 10T. No problems.

Jatem wrote: ↑

Sep 12 2019 2:46pm

Any chance I could hear an audio clip of the Mac running with phase runner?

Sure.
http://www.triketech.com/Drivetrain/Pow ... imbWeb.mp4