Search found 6963 matches

by Alan B
Jan 12, 2018 5:30 pm
Forum: E-Bike General Discussion
Topic: The "Bonanza Bulldozer" Dual PhaseRunner 2WD eMTB
Replies: 639
Views: 60067

Re: The "Bonanza Bulldozer" Dual PhaseRunner 2WD eMTB

When I finish it, I'll post a picture.

At the moment it is waiting for the rewiring to be completed, and other projects have taken priority.
by Alan B
Jan 01, 2018 3:01 am
Forum: General Discussion
Topic: ''Disarm'' a mobile phone
Replies: 13
Views: 295

Re: ''Disarm'' a mobile phone

It is up to the individual makers to decide what to do, but airplanes do have wifi internet these days, and cellular is the only thing that airplane mode needs to disable, bluetooth and wifi are often used. But many devices are old and not updated to the new standards.
by Alan B
Jan 01, 2018 12:35 am
Forum: General Discussion
Topic: ''Disarm'' a mobile phone
Replies: 13
Views: 295

Re: ''Disarm'' a mobile phone

Airplanes have wifi, so airplane mode doesn't shut off that radio.
by Alan B
Dec 26, 2017 10:03 am
Forum: E-Vehicles General Discussion
Topic: LOCKED WOT THROTTLE! what could cause this?? (crushed)
Replies: 2
Views: 175

Re: LOCKED WOT THROTTLE! what could cause this?? (crushed)

Water in the throttle, most likely. Though it could be water entry elsewhere in the wiring / connectors, anywhere the 5V and throttle wires are going. Kill switch is useful here, and ebrake should override throttle. Also full voltage signal coming from throttle should trigger a controller fault, tho...
by Alan B
Dec 23, 2017 7:20 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Ultimate BBSHD Grin Phase Runner FOC 3000W
Replies: 177
Views: 19143

Re: Ultimate BBSHD Grin Phase Runner FOC 3000W

Changing the system voltage, if that's what you did, rescales almost every variable in the controller and completely undoes all the tuning that has been done. If you return to the previous system voltage setting things may return to a working state. Good luck.
by Alan B
Dec 23, 2017 3:57 am
Forum: E-Bike Reviews & Testing
Topic: PowerVelocity controller review
Replies: 268
Views: 9058

Re: PowerVelocity controller review

Looking at the photo of the two FETs, there appear to be a lot of differences. Perhaps a counterfeit?
by Alan B
Dec 22, 2017 2:29 pm
Forum: E-Bike Reviews & Testing
Topic: PowerVelocity controller review
Replies: 268
Views: 9058

Re: PowerVelocity controller review

Great measurement. Variation well within spec sheets.
by Alan B
Dec 22, 2017 11:36 am
Forum: General Discussion
Topic: Quick 220
Replies: 15
Views: 505

Re: Quick 220

For a similar application of sharing 240 between dryer and electric car charging I bought a box that has a relay and two outlets. So only one thing is connected to the 240 at a time. The relay is appropriately rated.
by Alan B
Dec 22, 2017 12:13 am
Forum: E-Bike Technical
Topic: Replace rear brake with variable regen
Replies: 9
Views: 380

Re: Replace rear brake with variable regen

My CroBorg doesn't have much room for a rear disc with a Cromotor in a 135 dropout, so I jumped at the chance to set up variable regen with the Sabvoton. I took an ebrake lever apart and replaced the cable puller with a magnet and linear hall sensor. The Sabvoton needs a switch closure and an analog...
by Alan B
Dec 21, 2017 8:58 pm
Forum: General Discussion
Topic: Quick 220
Replies: 15
Views: 505

Re: Quick 220

They must be on different phases, that's how there's 240V between the hots.
by Alan B
Dec 19, 2017 2:11 am
Forum: E-Bike General Discussion
Topic: Sparkle destroying my Powerpole 45A
Replies: 26
Views: 767

Re: Sparkle destroying my Powerpole 45A

The amount of damage in the connector is a function of the voltage and the capacitance. If you have enough of either or both it will damage connectors unless they have anti-spark resistors. If you have enough voltage and capacitance it will burn out the anti-spark resistors, too. They have a limit o...
by Alan B
Dec 19, 2017 2:08 am
Forum: E-Bike Reviews & Testing
Topic: PowerVelocity controller review
Replies: 268
Views: 9058

Re: PowerVelocity controller review

Putting the excitation current and the reading currents through the same contact point causes the meter to be unable to differentiate the contact resistance from the shunt resistance, so it cannot accurately measure low values of target resistance. Four wire meters separate these two currents, and b...
by Alan B
Dec 18, 2017 7:24 pm
Forum: E-Bike General Discussion
Topic: Sparkle destroying my Powerpole 45A
Replies: 26
Views: 767

Re: Sparkle destroying my Powerpole 45A

pp45's are fine connectors, but the current surges are damaging them. You need to work around that.

SB50's use the same pins as PP75's, and the same crimper.

EM3EV sets up the powerpoles to stage with a resistor, if you want to use that technique.
by Alan B
Dec 18, 2017 1:59 pm
Forum: E-Bike General Discussion
Topic: Sparkle destroying my Powerpole 45A
Replies: 26
Views: 767

Re: Sparkle destroying my Powerpole 45A

On one ebike I used PowerPole 45's and PowerPole 75's. I plugged in the 45's first. There was a resistor on that circuit. Then I plugged on the 75's. No sparks. Just 2 plugs, in the right order. Would work fine with two 45's as well. They do have an earlier connecting pin for grounding that can be u...
by Alan B
Dec 17, 2017 1:56 pm
Forum: Battery Technology
Topic: Problematic charging
Replies: 9
Views: 257

Re: Problematic charging

Why connect a 10S charger to a 9S battery? Not a good plan.
by Alan B
Dec 16, 2017 1:34 pm
Forum: General Discussion
Topic: Ed's List of Your Best Vehicles
Replies: 19
Views: 503

Re: Ed's List of Your Best Vehicles

Dogman, those little squished Honda hybrids get higher than 65 mpg, as I recall. Forget what they call em. Might be too small for you and your dogs though. :)
by Alan B
Dec 15, 2017 2:27 am
Forum: General Discussion
Topic: Ed's List of Your Best Vehicles
Replies: 19
Views: 503

Re: Ed's List of Your Best Vehicles

Yes, the Ford Exploder is pretty good if it doesn't blow a tire and roll over. :) After I bought one of my 4Runners Ford's testing contractor invited me to test drive one of their prototypes, part of one of those testing deals. It turned out to be the Explorer, several years before introduction. It ...
by Alan B
Dec 13, 2017 2:11 pm
Forum: General Discussion
Topic: Ed's List of Your Best Vehicles
Replies: 19
Views: 503

Re: Ed's List of Your Best Vehicles

The Prius V is much larger than the prius. Fold the back seats down, we have 6 feet of bed. Plenty for large dogs. But it is not a minivan. It is a small station wagon. Not in the minivan class or SUV class. It is smaller than the Toyota 4Runner inside. Our Prius V AVERAGES 43 mpg. Completely amazin...
by Alan B
Dec 13, 2017 9:28 am
Forum: Battery Technology
Topic: Question about hobby charger amperage fluctuation
Replies: 11
Views: 218

Re: Question about hobby charger amperage fluctuation

This may be normal. Or it may be a sign of a problem. You said this is a new pack. So were the cells all cycled and capacity matched before the build? Or are things way out of balance and the chargers have a huge balancing job to do? Depending on the states of the cells, and the algorithm that the c...
by Alan B
Dec 11, 2017 4:24 pm
Forum: Items for Sale - New
Topic: Custom Waterjet Cut Parts
Replies: 102
Views: 16135

Re: Custom Waterjet Cut Parts

Another program to make part designs that I've been working with is OpenSCAD. I haven't tried it with Blue Saw yet, but it has been doing nicely for my 3D printer. It is free and runs on your own machine locally so you don't have to deal with slow servers and poorly timed updates.
by Alan B
Dec 11, 2017 12:55 pm
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1562
Views: 38304

Re: OpenSource firmware BMSBattery S/Kunteng KT controllers STM8

Most all micros have a protection system to keep the firmware safe from copiers. Once this feature is enabled the ability to read the firmware from outside the chip is lost (until after a complete erasure is done). Companies who value their firmware will enable this protection to keep their intellec...
by Alan B
Dec 10, 2017 8:31 am
Forum: E-Bike Technical
Topic: High wattage hub motor for 150mm drop out required
Replies: 13
Views: 461

Re: High wattage hub motor for 150mm drop out required

8kw is about double the continuous power of the larger ebike hubmotors like Cromotor, etc. Definitely in the Motorcycle class. Peak power might be triple that, so 24kW peak.

Enertrac.com has 10kw rating continuous hubmotors, so start there. Perhaps a very large scooter motor.
by Alan B
Dec 08, 2017 9:18 pm
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1562
Views: 38304

Re: OpenSource firmware BMSBattery S/Kunteng KT controllers STM8

I hope your test bikes have really convenient kill switches, in case something goes bad, to cut power quick.
by Alan B
Dec 08, 2017 4:58 pm
Forum: E-Bike Reviews & Testing
Topic: PowerVelocity controller review
Replies: 268
Views: 9058

Re: PowerVelocity controller review

... I pulled out several mosfets and tested them on all 3 of my testers and the measured results were all very close. For example, the oldest tester would say that a mosfet turned on at 3.7 volts, and the previous tester would say 3.8 volts and the new one would would measure 7.75 volts. THat's pre...
by Alan B
Dec 08, 2017 3:04 pm
Forum: E-Bike Reviews & Testing
Topic: Sabvoton MQCON review and documents
Replies: 21
Views: 2198

Re: Sabvoton MQCON review and documents

I don't have that information, so I wouldn't say that, but for best results these controllers run better with good information than with bad information. The more they know correctly about the motor the better.