Search found 361 matches

by Triketech
May 07 2021 8:43am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 976

Re: Do some motors have more/less torque with the same power levels?

It's an interesting off topic and I Dunno - Gremlins? How about how fast you are actually going, I assume the 36V is slower so do you go at the same speed up a steep hill on the 48V? If you zoom ahead and keep the 48V at a more efficient speed then stop and wait for the other cyclist on the 36v who...
by Triketech
May 05 2021 5:19pm
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 976

Re: Do some motors have more/less torque with the same power levels?

If both are the same MAC 10T but driven with different voltages, it will be partly the controller or wiring. Copper losses would be greater for higher current due to lower voltage to maintain the same overall power. Solution thicker wire for the 36V motor? 15-20% seems a lot though and the motor ge...
by Triketech
May 04 2021 10:08am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 976

Re: Do some motors have more/less torque with the same power levels?

Factor your missing in this is that the bike is geared to the same top speed/no load rpm... so the 'wheel speed' kv (or kQ) of the motor ends up being the same, hence the torque produced at the wheel also ends up being the same, even for 2 motors with different kV/kQ. Think a 10kV motor on a 100V p...
by Triketech
May 03 2021 11:31am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 976

Re: Do some motors have more/less torque with the same power levels?

Basic electronics tells us that winding counts will impact torque and voltage constants. Voltage Constant isn't the battery voltage its the voltage level a motor produces over a given RPM range. Torque Constant is the amperage required to produce a given level of torque. Both are generally linear Co...
by Triketech
May 03 2021 9:36am
Forum: EBike Technical
Topic: Setting up Phaserunner with mostly unknown motor specs?
Replies: 7
Views: 349

Re: Setting up Phaserunner with mostly unknown motor specs?

Read the Autotune & programming instructions about pole count settings, you'll need to know that value. You may need to open it up to get a count and gear ratio multiplier.
by Triketech
Apr 12 2021 9:20am
Forum: EBike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 8744
Views: 959299

Re: New "TSDZ2 Torque Sensor Central Motor"

Maybe my TSDZ2 is somewhat noisy despite being a newer one with helical gears, but I've tested / cycled beside a few different BBS02s, and they are all much quieter. A little noise is expected but this seems a bit extreme. At 10 feet away its in the 52dB range. Rider needs earplugs. Here is a video...
by Triketech
Apr 09 2021 10:30am
Forum: EBike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 8744
Views: 959299

Re: New "TSDZ2 Torque Sensor Central Motor"

Wow, 338 pages. I bought an early TSDZ2 36V, VLCD-5 direct from Tongsheng in 2017. It has the nylon primary gear and is well greased. Secondary gears (10 Tooth Pinion/70 Tooth Spur gears) are pretty loud and add quite a bit of drag. Close inspection revealed that the Pressure Angles of the two gears...
by Triketech
Apr 06 2021 9:43am
Forum: EBike General Discussion
Topic: Dual Motor Build for an Ice Adventure Trike
Replies: 20
Views: 848

Re: Dual Motor Build for an Ice Adventure Trike

Motor torque will load the front elastomers; you may want to have the stiffest elastomer springs available from ICE. Buy the Grin JST Connector kit and crimpers. You can use old USB cables fitted with JST connectors to stretch signal cables. You will need the Hall Sensors connected for start from ze...
by Triketech
Jan 21 2021 11:30pm
Forum: EBike Technical
Topic: Hub Motor Selection - Electric Velomobile Project
Replies: 7
Views: 255

Re: Hub Motor Selection - Electric Velomobile Project

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...
by Triketech
Dec 29 2020 5:22pm
Forum: EBike General Discussion
Topic: Best bang for the buck DD Rear Hub Kit
Replies: 62
Views: 2292

Re: Best bang for the buck DD Rear Hub Kit

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 ...
by Triketech
Dec 29 2020 4:06pm
Forum: EBike General Discussion
Topic: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction
Replies: 16
Views: 935

Re: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction

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...
by Triketech
Dec 28 2020 1:51pm
Forum: EBike General Discussion
Topic: Best bang for the buck DD Rear Hub Kit
Replies: 62
Views: 2292

Re: Best bang for the buck DD Rear Hub Kit

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...
by Triketech
Nov 23 2020 8:33am
Forum: EBike Technical
Topic: Geared hub motor getting noisy....
Replies: 10
Views: 347

Re: Geared hub motor getting noisy....

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...
by Triketech
Nov 21 2020 9:50am
Forum: EBike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 39
Views: 1762

Re: Your thoughts on frames and riding positions?

As for comfort on longer rides it doesn't get any better than this.
Image
by Triketech
Nov 08 2020 9:37am
Forum: EBike Technical
Topic: Tandem Torque sensor
Replies: 2
Views: 320

Re: Tandem Torque sensor

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...
by Triketech
Sep 29 2020 1:08pm
Forum: EBike General Discussion
Topic: Phaserunner acceleration
Replies: 20
Views: 824

Re: Phaserunner acceleration

There is a slight lag as it switches from Hall to FOC mode on a MAC. Otherwise equal to a 12 FET Infineon.
by Triketech
Sep 08 2020 9:09am
Forum: EBike General Discussion
Topic: Question about a recumbent trike build
Replies: 13
Views: 732

Re: Question about a recumbent trike build

My MAC 10T has over 5000 trouble free miles.
by Triketech
Aug 31 2020 11:28am
Forum: EBike General Discussion
Topic: MAC motor selection and MAC clutch issues.
Replies: 20
Views: 2177

Re: MAC motor selection and MAC clutch issues.

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...
by Triketech
Jun 27 2020 1:07pm
Forum: EBike General Discussion
Topic: Direct Drive Motors-Internal or External Controllers?
Replies: 9
Views: 538

Re: Direct Drive Motors-Internal or External Controllers?

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...
by Triketech
Jun 22 2020 10:56am
Forum: EBike Technical
Topic: GMAC on a new Mountain Bike?
Replies: 10
Views: 747

Re: GMAC on a new Mountain Bike?

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...
by Triketech
Jun 10 2020 10:16am
Forum: EBike General Discussion
Topic: eZee vs MAC? Your thoughts?
Replies: 33
Views: 1177

Re: eZee vs MAC? Your thoughts?

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...
by Triketech
Jun 09 2020 11:44pm
Forum: EBike General Discussion
Topic: eZee vs MAC? Your thoughts?
Replies: 33
Views: 1177

Re: eZee vs MAC? Your thoughts?

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...
by Triketech
Jun 09 2020 9:25pm
Forum: EBike General Discussion
Topic: eZee vs MAC? Your thoughts?
Replies: 33
Views: 1177

Re: eZee vs MAC? Your thoughts?

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...
by Triketech
May 25 2020 12:24pm
Forum: EBike General Discussion
Topic: Would like to make an eTrike less prone to tipping over
Replies: 39
Views: 941

Re: Would like to make an eTrike less prone to tipping over

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...
by Triketech
May 18 2020 10:18am
Forum: EBike Non-hub Motor Drives
Topic: Rohloff: torque limit issues
Replies: 9
Views: 517

Re: Rohloff: torque limit issues

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

Shear pins are not a roadside fix without a vise.