Components tech

Mobipus hot rod controllers, and Shenta Tsai

Mobipus hot rod controllers, and Shenta Tsai

During the last yr, I might sometimes hear about these new Mobipus controllers. As soon as a number of hot-rodders I do know received their palms on one after which stated they have been nice, I knew I needed to take a while to look somewhat deeper into what all of the fuss was about.

A lot of the scorching rod controllers which are discovered on highly effective ebikes are literally designed for small bikes, so that is simply one other variation on that theme (the pic on the header above is Sketch Coleman in Australia, displaying off on his Mobipus-controlled electrical conversion Tremendous-moto…extra on that later).

Shenta Tsai, the designer

I’ll get to the explanations that some builders like these, however first I’d like to inform a bit bit concerning the engineer who designed them. Shenta is from Taiwan, and his household has a big enterprise with manufacturing amenities in Thailand. Someplace alongside the road, Shenta turned fascinated with electrical automobiles, and commenced hot-rodding them to study first-hand how they might be made to run quick.


Shenta Tsai, designer of the Mobipus household of controllers


Scorching-rodding a motorbike is just not low cost, however…it’s MUCH cheaper than scorching rodding a automotive. I can sympathise as a result of I acquired my motorbike license in 1978, and I’ve skilled first-hand how a medium-weight motorbike can simply beat some spectacular automobiles from stoplight to stoplight (and sure, rushing tickets are costly). Shenta selected a standard motorbike present in Taiwan to scorching rod (an E-Grom, click on right here), and he used it as his prototype for experimenting.

“…My bike, the Purple Satan…goes from zero–100 km/h in simply three.6 seconds…” [100km/h is 62-MPH]…24S LiFePO4 (100V) 60-Ah pack, vary is sweet, as much as 90-km on eco, 60-km on regular. These motors are tremendous exhausting to get, not from QS…I obtained my very own magnets and ship them to 9C for meeting…

…The idea of the corporate is constructed round a quite simple concept and philosophy: I simply need to make nice merchandise to gasoline our ardour, and share it with individuals I like. Fuck business merchandise made for revenue solely. I ask myself, am I happy with this? would I pay for it?…

…By no means ask what your shoppers’ wants are, as a result of in case your requirements are greater, you’ve acquired to fulfill your self first. My concept is straightforward: we don’t search for ready-made options, we don’t purchase different individuals’s know-how. We go from not figuring out, to understanding. I ask, am I happy with this? That’s all the time our start line and ending level. Proper now we’re additionally engaged on creating a brand new BMS….”

I’ve by no means met Shenta, and I already like this man.

What’s the competitors for Mobipus?

If Mobipus was primarily targeted on electrical bikes and scooters (that are a highly regarded transportation car all around the globe), why are we speaking about them in an electrical BICYCLE  web-magazine? Properly, they’ve two fashions which are sufficiently small to be thought-about applicable for decent rod ebikes. And yeah…they’re costly.

A resident scorching rodding guru from Canada on the endless-sphere discussion board is known as Stephane Melancon (Physician Bass). Just lately, he has been a fan of the Adaptto controllers from Russia. I “virtually” researched and wrote about them a number of occasions, however there was all the time one thing else that was extra necessary and was pushed to the entrance of the road.

Within the meantime, the Adaptto firm has had some points. Each design has some pluses and minuses, and Adaptto controllers undoubtedly have some fascinating options, however…they’ve additionally had spotty customer support, they usually refuse to extend manufacturing, so…they may stay exhausting to get in the meanwhile. Even their followers have admitted that they’re considerably troublesome to program, and programming a controller to work properly with a selected motor is significant so as to get one of the best efficiency.

The opposite controller I’ve examine as a competitor to Mobipus is Sabvoton, a Chinese language maker of scooter controllers. Regardless of a robust ebike fan-base, Sabvoton controllers are pretty giant for a similar output, in comparison with Mobipus, and area on an ebike is a serious consideration. Additionally, Sabvoton controllers have just one shunt, and Mobipus controllers have three…which I’ll clarify under.

The 48070 and the 72200

The “Weichayan” 48070 (click on right here) is their 13S / 14S controller (13/14 cells in Collection), which can run a 48V or 52V system utilizing 35A steady and 70A as a short lived peak. When beneath arduous acceleration, that’s 3600W of energy.

The dimensions is 120mm X 120mm, and 65mm thick (four.eight X four.eight, and a couple of.6 inches thick). I haven’t discovered anybody but who has been utilizing the 48070, however I feel it might work nicely with the 1500W-rated direct-drive hubmotors with 35mm vast stators, which carry out properly with 3600W peak energy (and they’re my favourite measurement for a daily-commuter DD hubmotor ebike, or cargobike)


The Mobipus 48070


Additionally they have a barely bigger 48150 mannequin (48V 150A, click on right here), however I haven’t discovered a retailer for it but, they usually might quickly be out there direct from Mobipus.

The “Spiritrum” 72150 (72V 150A, click on right here) is roughly the identical measurement because the 48150, and it’s far more highly effective. It may be programmed to run something from 48V as much as 72V (13S, 14S, 16S, 20S…which is a nominal 48V, 52V, 60V, 72V). The max volts are listed as 90V, however a 20S pack that’s at a nominal (common) voltage of three.6V per cell, is definitely four.2V per cell when absolutely charged, which might be (20S X four.2V =) 84V.

edit: it seems as if the 72150 has been changed by the 72200, and the 72150 is not obtainable. This can be a good factor.


The compact Mobipus 72200 with a big aluminum finned “warmth sink” hooked up to assist cooling


In the event you increase the voltage in your undertaking to a better degree (96V / 24S as an alternative of 72V / 20S), you will get the identical complete energy with fewer amps, which “can” permit the system to run a bit cooler. Nevertheless, larger volts are extra harmful to work on, plus the elements for larger volts are much less environment friendly. Decrease-efficiency elements will flip extra of the input-watts into waste-heat as an alternative of wheel-power. The Australian retailer I discovered has special-ordered the Spiritrum mannequin as a 72200, utilizing 72V and 200A (part amps are restricted to a max of 350A).

In case you are questioning what the Pink Satan makes use of, it’s the 72600 mannequin modded to permit 100V, which runs 100V 600A for about 60,000W (you’ll be able to see a efficiency video of the Pink Satan by clicking right here). Now that very high-amp cells are available, many hot-rodders are experimenting with 72V methods, as a result of the effectivity is a lot better, and the 20S battery packs are easier and barely smaller than a 24S pack.

Sketch Coleman (within the header pic above) is utilizing the Mobipus 72600, and a video of that may be discovered by clicking right here…


One of many options of all of the Mobipus controllers is the acute water-proofing. They’re absolutely potted, and click on right here for a video displaying a operating motor check whereas the controller is bathed in water. All controllers and throttles must be made like this.


A Mobipus controller check of its water-proofing

Sam’s rotary throttle converter

Most electrical bikes use a Corridor-sensor based mostly hand-throttle, however only a few high-end builders truly benefit from the “really feel” of the widespread ebike throttles. By comparability, bikes are a HUGE international market and competitors has resulted in all kinds of reasonably priced mechanical cable-throttles. Nevertheless, for those who attempt to use a type of, you will have one thing to transform the cable motion into an electrical sign.

Sam is stocking the most effective mechanical-to-electrical throttle converter he has discovered. Not solely does this permit the builder to make use of a readily-available motorbike hand-throttle with a superb “really feel”, it additionally provides an excessive degree of water-proofing, because the electrical portion could be tucked away inside a water-proof housing across the controller.


Sam’s motorbike throttle-to-electrical converter

The Dashboard

One of many actually nice issues concerning the Mobipus system is the dashboard. As an alternative of designing a proprietary show you can solely purchase from Mobipus, the system is designed to simply accept any home windows gadget as a show. This implies your show could be a s small as a smart-phone, or as giant as any available home windows pill system. Because you wouldn’t be utilizing the show for its computing energy, you’ll be able to even purchase a used one to save lots of fairly a bit on the worth.


The Mobipus show

Sketch selected a small pill to make use of because the show for his venture

Extra Options

The Mobipus makes use of true sine-wave management for a motor operation that’s as clean and quiet as is feasible.

It has an adjustable regenerative braking function (referred to as regen), which converts a motor right into a magnetic brake whereas slowing down. Many individuals appear to be enthusiastic about how a number of watts are pumped again into the battery by regen, however the quantity could be very small. Nevertheless, utilizing regen as a magnetic brake is a function that’s turning out to be extraordinarily in style as soon as anybody tries it.

It additionally makes use of what’s referred to as Subject Oriented Management  (FOC), which requires the controller to measure the present in every of the three motor part cables. That is why it has three shunts as an alternative of just one. A shunt is a conductor that has a really precisely-measured quantity of resistance, so the controller can measure how a lot present is passing by means of that exact cable (suggestions loop) by calculating the very minor voltage drop throughout the shunts’ size throughout operation.

Ballarat Ebikes in Australia

Sam Dekok runs Ballarat Electrical Bikes, which is near Melbourne in Australia. Thus far, he’s the one supplier I’ve discovered for Mobipus controllers. English is his native language, and if you’d like him to program your Mobipus controller, Sam discovered every thing concerning the Mobipus programming so he can program it for you. He may even change the programming after you’ve it, by remotely accessing it in case you hook it as much as your internet-enabled laptop computer (for a charge).

Remember that one of many issues that clients have actually appreciated about Mobipus is how straightforward and intuitive the programming is. Shenta [the designer] completely hated how exhausting all of these different controllers have been to program, when he was experimenting with all the different choices.

Sam has been a hot-rod ebike fanatic for a few years, and his day-job is constructing hybrid automobiles for the Australian authorities. His youtube channel has one video that’s evaluating the Mobipus 72200 and the 72600 (click on right here), and his different movies are in an index, discovered right here.

Sam presently shares the 72200, and in addition the 72600, which he feels would be the hottest. The 600A model is roughly twice as giant because the 200A, and that one is absolutely solely appropriate for an electrical motorbike.

Ohbse in New Zealand

The endless-sphere discussion board has a member from New Zealand, who calls himself Ohbse. Here’s what he has posted about his Mobius construct.

“…When in comparison with the widespread Sabvoton 72V 150A controller it’s very favorable, lower than half the quantity, much less weight, extra energy, a lot better software program, higher help, extra security and options. Superior connectors, higher construct high quality and comparable worth, although less expensive than the Adaptto or Kelly choices.

I’m now operating a 72200 on my DH Comp with a QS 205 50 V3 three.5T in a set of 17″ wheels with Heidenau Okay56 tires, 20S / 12P of Samsung 30Q cells for about 2.5-kWh. Presently configured to about 300A part/180A battery and it actually hauls ass, whereas being exceptionally controllable…”


A Mobipus-controlled ebike from New Zealand

Jim McPherson’s off-roader

I’ve reached out to Jim McPherson, who has posted a video of his high-powered Mobius-controlled off-road ebike on youtube. I’m hopeful he’ll reply, so I can discover out extra details about it.


Mobipus has posted on endless-sphere, and that dialogue thread may be discovered by clicking right here.

The hyperlink they offered indicated you’ll be able to information direct from the customer support by emailing [email protected]


A Mobipus 72200

Written by Ron/spinningmagnets, November 2018