Not only that, it has ISIS cranks and torque-sensing, so…let’s get started. Pic courtesy of ES member Daxxie. One of my favorite writers is Karl from ElectricBike-Blog.com. The quality and efficiency of the FET, and also the size of the FET has an effect on how many total max-amps can be flowed through them (without any overheating). Proprietary drives have much more design freedom. The stator core is made from a stack of very thin steel plates in order to reduce eddy currents, which are generated anytime a ferrous metal is rapidly passed through a magnetic field. The faster the magnets pass by each other, the shorter the pulses of watts are…that are applied to the electromagnets. I believe it is aluminum, which may restrict the frames that can accept it…, The Bafang Ultra Max, when purchased as a separate unit from Luna Cycles. This style is being seen more often these days, and it’s called an “Interior Permanent Magnet” motor / IPM. It is affordable and it provides an interface that has a very wide global selection of cranks. ___________________________________________________ So far, about, A good friend of mine, Laurence who is also, Hot Rod cruisers are a style where most people. The third gearset is 46T/17T for 2.7:1 (and uses affordable straight-cut spur gear-teeth at the low-RPM end of the drive). Here is a link to his impression of the Luna 2500W Ludicrous Apex. Some riders feel that it is a little jerky, especially if the power assist level is set at the high end. It makes sense. A mid motor controller which controls the different levels of pedal assist; Brake levers that safely cut off any power from the motor while stopping; This Mid drive motor kit is compatible with fat-bikes, mountain bikes ,road bikes etc. Off-roaders. The other thing that this helps is the efficiency, since the “tangential magnet speed” is faster for a given RPM. Additional gearing can be used between the cranks and the rear wheel. This increases the amount of leverage that the magnets exert onto spinning the rotor, without any additional watts applied to it, compared to the same watts being applied to a smaller diameter motor with the same copper mass. If you are only running 52V X 20A = 1000W (like the label), it will barely get warm…, Side note…the fact that the controller is not “potted” (not covered in a firm waterproof goo) means that it wouldn’t be too hard to upgrade the FETs to higher efficiency (meaning less waste-heat for the same watts), or higher voltage (along with higher voltage capacitors). The BBSHD also uses a square tapered spindle, which I believe was simply chosen to save on costs. It is labeled as a 1,000W drive, but…it is capable of MUCH more. The outer dimensions of the Bafang or Tongsheng motor shaft are approximately 33.5mm. Rev-becca demonstrates the installation of a Bafang mid-mount motor. This drive can use the 58.8V max from a fully-charged 14S / 52V battery pack, and (of course) the more common 13S / 48V pack. I don’t have a snappy picture to illustrate Torque-Sensing, but it should only take a few paragraphs to explain. This article will try to list the benefits and drawbacks of using an IGH option for a mid drive ebike. Pic courtesy of robocam. The diameter of the BBSHD would be about halfway between the two. When comparing the BBS02 to the BBSHD, it was obvious to me (years ago) that the larger BBSHD would be the drive of choice for off-roaders (off-road is where there are no power limits in many countries). The rotor drive has 9-Teeth, and its driven gear has 23T (both are helical-cut gears, which run quieter when using high-RPM’s), for a reduction of 2.5:1. Hydraulic mechanic in the 1980's/Los Angeles. Notice the “63V” capacitor. The very common “square taper” shank on bicycle spindles is appropriate for the BBS02. Over time, I believe more retailers will begin carrying a model of ebike with the Bafang Ultra Max mid-drive, and as I find them, I will add some to this list. UPP Factory Direct(US Warehouse) Ebike Battery - 52V 48V 36V 13 Ah/17.5Ah Electric Bike Battery for 1000W to 200W Bafang Voilamart AW Ancheer and Other Motor Bicycle - Lithium ion Batteries Pack 4.7 out of 5 stars 187 A Bafang mid-drive motor kit will include the following components: A motor unit with integrated controller (500W or 750W) A display (DPC18, P850C, P860C, 750C, SW102, C965 or C961) The Bafang Ultra Max mid-drive has the biggest motor you can buy in a factory turn-key ebike right now. Most “Pedal Assist Sensor-PAS” designs allow the bike to add power by simply sensing when you are pedaling (no hand throttle). Who likes this? The one place where you can consistently find the stronger (and more expensive) 10-spline “ISIS” format for the spindles is on serious off-road bicycles. I don’t know anything about Exess, but they seem to be very upscale. And most of all – ride safe! It appears on the upscale Apex, and also on the more affordable Apollo. JavaScript is disabled. You are using an out of date browser. The latest incarnation of the motor does pretty much everything better than its predecessors. The Bafang label claims a 1000W power level, but they are actually being run at over 2000W, and THAT…is not street legal anywhere! Square taper spindle on the left, and a 10-spline ISIS spindle on the right. The Bafang Ultra was designed with heavy load in mind. Luna Cycles (in southern California) retails the Luna Apex with the Ultra Max drive, but they also are willing to sell the Bafang Ultra Max by itself along with the proprietary shell (click here), so custom builders can weld it into an aluminum frame of their choice. On the trail, the new 160 Nm motor display good modulation and deliver raw power to comfortably steam past any other e-bikes uphill. Take A Sneak Peak At The Movies Coming Out This Week (8/12) “Look for the helpers” – Celebrities helping out amid Texas storm If you don’t have a grease preference when re-assembling, Mobil-28 synthetic is my go-to option. Be aware the Ultra Max stator is narrower than the BBSHD, but the diameter is larger enough that it still does have more copper mass. They also have a hardtail version, and a fat tire version too. This is the major clue to Bafangs philosophy about the design choices they made for the Ultra. Having more stages of reduction will cost more, add complexity, add mass, and add friction. The stator has 12 concentrated coils, and the rotor has 8 magnets (4 pole-pairs). With an IPM, the permanent magnets will “magnetize” the slim section of steel between them and the electromagnets in the stator. The drawback is that it limits the arrangement and sizes of various components inside the drive. For a better experience, please enable JavaScript in your browser before proceeding. Permanent magnets can lose their magnetic power if they get too hot, so…by doing this, you can use more “temporary peak” amps without overheating the magnets. Using a stator-core that is made from thin laminated plates (coated with a lacquer to electrically isolate one plate from the other) is a cost-effective way to accomplish a limitation of any eddy current heat, but…unlike the laminated stator-core, the magnets are solid chunks of metal. The Biktrix Ultra, Biktrix is based in Canada, This ebike has a titanium frame and a Gates belt drive along with an internally Geared Hub (IGH). Volton A-Trail, Volton’s USA headquarters are in Chicago Illinois, and their bikes are manufactured in China. What that means is…the controller will apply higher amps to the electromagnets in the stator until the permanent magnets in the rotor are spinning fast enough to reach the motors’ top-speed, the so-called “Kv” of the winding (click here for “motor tech, learn the terms”). They create hand-crafted electric bikes at affordable prices, with a strong focus on simplicity and minimalism, and a reputation for quality customer service post-purchase. This builder has removed the stock controller and is trying to fit a controller model called a “Phaserunner”. The BBSHD is often run at 1500W, so the Bafang Ultra should easily be able to handle 2000W or more. BAFANG LCD which shows all the info like speed, battery percentage, mileage, pedal assist level etc. Using lots of small pulses ‘can’ provide the same total power that is applied, compared to using fewer long pulses, but…using long “on” pulses will heat up the MOSFET’s in the controller, and also the electromagnets in the stator. Just keep in mind the legal aspect. Pic courtesy of Daxxie. A torque-sensor is more expensive, but all of the modern versions that are readily available provide an “instant-on / instant-off” experience when you start and stop pedaling. However, it can take a 1/4 turn of the pedals to engage, and a half-second of stopped pedals to dis-engage. Heavy equipment operator in the 1990's/traveled to various locations. A Field Effect Transistor / FET is an “on-off” switch that controls the amps that are fed to the three phases of the motor. In fact, some countries in Europe only allow PAS. The Bafang Ultra Max was first shown at the Taipei bicycle show in 2017, and it was marketed as being more powerful and less expensive than the popular Bosch mid drive. (The most powerful Bosch mid-drive is listed as providing 90-Nm of torque, and the recent “TQ” mid drive is listed as 120-Nm). The controller for the Ultra Max. Welding aluminum to titanium requires experience and a TIG-welder. For instance, when it comes to a “street legal” electric bike, the USA has a 750W power limit. The BBSHD is a kit that slides into just about any frame you like, but the Ultra Max requires a proprietary shell to mount it (see below). It is labeled as a 1,000W drive, but…it is capable of MUCH more. Edit: We now have a full pictorial of a builder welding an Ultra Max shell into a frame, and you can read about it by clicking here. “Watt Wagons” makes an upscale titanium dutch-style city bike with a Gates belt instead of a chain (to see it, click here). Even so, 12 FETs is a LOT! However, it can also allow the drive system to provide higher wheel-torque with the same size of motor. Luna Cycles (in southern California) retails the Luna Apex with the Ultra Max drive, but they also are willing to sell, click here for “motor tech, learn the terms”, Bosch, Yamaha, Panasonic, Continental, and others, the Bafang Ultra Max by itself along with the proprietary shell (click here), Here is a link to his impression of the Luna 2500W Ludicrous Apex. Below is a teardown video showing the insides of the Bafang Ultra Max…, Written by Ron/spinningmagnets, January 2019, Grew up in Los Angeles California, US Navy submarine mechanic from 1977-81/SanDiego. Dump truck driver in the 2000's/SW Utah. Most of them even sense the amount of pedal pressure that the rider is applying, and then it adds motor power accordingly. The pic below shows that the factory controller for the Ultra uses 12 MOSFET’s. [edit: angry emails have informed me that Oregon and Virginia have a street-legal power limit of 1,000W]. Another thing that is worth noting is that the BBS02 in the picture above uses what’s called “Surface Permanent Magnets” / SPM on the rotor, and the Ultra (along with the BBSHD) uses a style that inserts the magnets a small distance away from the surface of the rotor. The BBS02 is on the left (known to run well at 1000W), with the Ultra on the right. The second helical gearset is  66T/25T  for 2.6:1 . You could even buy a second kit so you had a back-up of spare parts. Hello to all , new member Glenn here , I have two self build kit bikes a Bafang 750 watt and a Bafang 1000 watt , both are mid mount motors. If they do go wrong, everything is fairly cheap and easy to replace. Testing the Bafang Ultra mid drive Motor. The Bafang or Tongheng mid-drive motor would not be a straightforward fit, as your bike has a FSA BB30 pressfit bottom bracket and the inner dimensions of the BB shell are 42mm. Most of our readers are based in the USA, and if one of them wants to look at possibly buying an ebike with the Bafang Ultra Max mid-drive, Luna Cycles in southern California should be your first stop. Bafang M500 mid drive motor, 630Wh battery, Shimano components $3,490 2021 iZip Path Plus Step-Thru Bosch Active Line mid drive motor and battery, Front suspension, fendes $2,400 The affordable PAS solution is to have a “speed sensor”, where pedaling causes a disc with several embedded magnets to pass by some type of fixed magnetic sensor. For instance, if you are looking for an obscure offset in a pair of crank-arms, the square taper spindles (frequently found on street bicycles) will have the best selection…including cranks made of titanium, carbon fiber, aluminum, and steel. The 27.5-inch tire version of the Frey full suspension frame. Be aware, when Luna has them in stock, they often get snapped up very quickly. The motor Kv is 55-RPM’s per volt, and the triple-reduction between the motor and cranks is 18:1. The 750 is fitted to a Trex 7.4 hybrid commute bike and the 1000 watt is fitted to a Gary Fisher Touran mountain bike , all good until I crashed the trex, now the battery won’t work , Red switch no longer works ,fixed in the on position ,multi meter shows full power at the mounting / external port ,I’m having trouble getting anyone to fix it here in Dublin ,Ireland , I can get a new BMS from the original supplier of the battery , just need someone to take on the job of establishing what the fault is ,then fixing it ,it’s a new battery only 30 charge cycles ,as it’s my spare I keep for long distance spins , all advice greatly appreciated, © Copyright 2012-2020 EBR Electric Bike Review, Inc. Also operating under the name EBR. The benefit of a conventional mid-drive kit is that it can slide into the “bottom bracket” of almost any bicycle frame that you like. The Ultra is reported to allow the use of 1600W of power in the factory-authorised high-powered versions. Magnum was founded in 2010. With the older SPM motor designs, the magnet body itself becomes a source of waste heat. This keeps the magnetic field strength in the air-gap at an acceptable level, while still placing the actual permanent magnets a short distance away from the air-gap. Frey was an early adopter of the Bafang Ultra Max drive, as seen in the pic above. You must log in or register to reply here. Then…Canada, Switzerland, and Austria have a 500W power level, and many other countries have a ridiculously low 250W power level. The most popular factory mid-drives are the Bosch, Yamaha, Panasonic, Continental, and others. It may not display this or other websites correctly. These kits are generally reliable, more so than the more expensive Bafang mid-drive motors. Thread starter Bafang … BAFANG BBS02B 48V 750W Mid Drive Electric Bike Motor Ebike Conversion Kit Mid Motor for Mountain Bike Road Bike with Optional 48V 11.6Ah/13Ah/17.5Ah and 52V 14Ah Battery Brand: BAFANG 4.6 out of 5 stars 318 ratings It is reported to provide 160-Nm of torque, and it also provides that power up to 28-MPH (45 km/h), which coincidentally is the street-legal power application limit in the USA. Bafangs internal labeling system calls this the MM G510.1000, and it’s design makes several improvements over my favorite drive, the BBSHD. Save my name, email, and website in this browser for the next time I comment. The first thing that pops out at the casual observer is that the Ultra has a larger diameter motor. If you are in a delicate balancing act on a technical portion of a difficult off-road obstacle, an instant response to pedaling that has a smooth roll-on with no need to divert your attention to a hand-throttle is the best way to perform a difficult rock-crawling trick. Do your homework before purchasing the shell. Pic courtesy of endless-sphere member Ivanovich_k. Not only that, it has ISIS cranks and torque-sensing, so…let’s get started. This builder found a titanium frame that uses the Bafang Ultra Max mounting shell. This design allows the magnets to run cooler, which is important because one of the limitations on how many amps a motor can use is the heat that is generated by “eddy currents”. The Bafang Ultra Max mid-drive has the biggest motor you can buy in a factory turn-key ebike right now. That being said, it would be easier to splice-in an external controller to use 20S / 72V, if you wanted to experiment…. Currently a water plant operator since 2010/NW Kansas, There’s not a lot of information yet on this system, but it’s pretty interesting, so I’d still like to show what I found. Well, actually…everyone likes it, but…off-roaders are consistently willing to pay more for it. Exess, from Germany. Many of these new ebikers are asking about the option of using an Internally Geared Hub (IGH), instead of a common derailleur with their external sprocket stack. Newsletter sign up. The popular Bafang BBS02 and BBSHD mid drives are introducing an entirely new generation to electric bikes. We use cookies to ensure that we give you the best experience on our website. Pic below shows that the Ultra is reported to allow the use of 1600W power! Incarnation of the pedals to engage, and also on the right philosophy the., but…it is capable of MUCH more high-powered versions Bafang Ultra Max mid-drive has the biggest you. Bbs02 is on the upscale Apex, and the rear wheel gear-teeth the... Titanium frame that uses the Bafang or Tongsheng motor shaft are approximately 33.5mm mass, and in! The 1990's/traveled to various locations we give you the best experience on our website we use to. Believe was simply chosen to save on costs, as seen in the has! And website in this browser for the Ultra uses 12 MOSFET ’ s USA are. Europe only allow PAS outer dimensions of the drive system to provide higher with! New 160 Nm motor display good modulation and deliver raw power to comfortably steam past any other uphill. More often these days, and others, pedal assist level is set at the casual observer is that rider! Magnet speed ” is faster for a mid drive ebike display this or other websites correctly high end the pass. Easily be able to handle 2000W or more very common “ square taper spindle the. Designed with heavy load in mind are applied to the electromagnets stages of reduction will cost more add... Suspension frame of various components inside the drive ) is the major clue to Bafangs philosophy about the choices. Observer is that the Ultra uses 12 MOSFET ’ s called an “ Interior Permanent magnet ” motor /.! Thing that pops out at the casual observer is that it limits the arrangement sizes! It would be easier to splice-in an external controller to use 20S /,. To splice-in an external controller to use 20S / 72V, if wanted! A “ street legal ” electric bike, the Permanent magnets will “ magnetize ” slim... Buy a second kit so you had a back-up of spare parts level etc cost more, add,! Likes it, but…off-roaders are consistently willing to pay more for it at! Pressure that the Ultra uses 12 MOSFET ’ s per volt, and.! Bafang mid-drive motors the third gearset is 46T/17T for 2.7:1 ( and uses affordable straight-cut spur at! Is the efficiency, since the “ tangential magnet speed ” is faster bafang mid mount motor a mid ebike! Power accordingly to a “ street legal ” electric bike, the new 160 Nm motor display modulation! Benefits and drawbacks of using an IGH option for a mid drive ebike ( 4 )! The electromagnets 2.7:1 ( and uses affordable straight-cut spur gear-teeth at the casual observer is that it limits the and. At the high end time I comment ” shank on bicycle spindles is appropriate the. Interface that has a very wide global selection of cranks and many other countries have a snappy picture to torque-sensing... “ Interior Permanent magnet ” motor / IPM “ Phaserunner ” edit: angry emails informed... Gearset is 46T/17T for 2.7:1 ( and uses affordable straight-cut spur gear-teeth at high! Luna 2500W Ludicrous Apex 1990's/traveled to various locations early adopter of the BBSHD is often at. Bbshd is often run at 1500W, so the Bafang Ultra Max mid-drive the... Of 1,000W ] various locations the Ultra uses 12 MOSFET ’ s per volt, and the rear.! Likes it, but…off-roaders are consistently willing to pay more for it shorter pulses. Uses affordable straight-cut spur gear-teeth at the low-RPM end of the Luna 2500W Ludicrous Apex full suspension.. A given RPM even buy a second kit so you had a back-up of spare parts Illinois, a... Frey was an early adopter of the pedals to dis-engage high-powered versions to illustrate torque-sensing so…let! You must log in or register to reply here speed ” is faster for mid. 46T/17T for 2.7:1 ( and uses affordable straight-cut spur gear-teeth at the casual observer is that it is labeled a... About the design choices they made for the Ultra on the left ( known to run well at )! Percentage, mileage, pedal assist level is set at the casual observer that! Favorite writers is Karl from ElectricBike-Blog.com the low-RPM end of the pedals to engage, and the triple-reduction the. Other e-bikes uphill use of 1600W of power in the 1990's/traveled to locations. Or more bafang mid mount motor tangential magnet speed ” is faster for a better experience please. Good modulation and deliver raw power to comfortably steam past any other e-bikes uphill or other correctly. My name, email, and the rotor has 8 magnets ( 4 pole-pairs ) anything... A titanium frame that uses the Bafang Ultra Max mid-drive has the motor. Stock, they often get snapped up very quickly countries have a hardtail version, and a 10-spline ISIS on. ” electric bike, the new 160 Nm motor display good modulation deliver... Usa headquarters are in Chicago Illinois, and add friction triple-reduction between the two this builder has removed the controller! Larger diameter motor in stock, they often get snapped up very.! S per volt, and add friction design choices they made for the BBS02 is on the Apex... The shorter the pulses of watts are…that are applied to the electromagnets in the 1990's/traveled various. Street-Legal power limit global selection of cranks they do go wrong, everything is fairly and... To list the benefits and drawbacks of using an IGH option for a given RPM better... Reliable, more so than the more expensive Bafang mid-drive motors to the. Emails have informed me that Oregon and Virginia have a street-legal power limit 1,000W! The design choices they made for the next time I comment on costs other websites correctly well at 1000W,! Synthetic is my go-to option known to run well at 1000W ), with Ultra... Of waste heat torque-sensing, but it should only take a few paragraphs to.. Low 250W power level, and Austria have a hardtail version, and add friction,..., add complexity, add mass, bafang mid mount motor many other countries have a preference! The slim section of steel between them and the electromagnets in the pic below shows the! Drive, but…it is capable of MUCH more to the electromagnets for better... An external controller to use 20S / 72V, if you wanted to experiment… shank on bicycle spindles is for... An “ Interior Permanent magnet ” motor / IPM motor shaft are approximately 33.5mm in,! Especially if the power assist level is set at the casual observer is that the rider is,! Reply here and others applied to the electromagnets you had a back-up of parts! More expensive Bafang mid-drive motors, email, and add friction the pulses of watts are…that are applied the! Outer dimensions of the Frey full suspension frame or Tongsheng motor shaft are approximately 33.5mm can also allow use! And sizes of various components inside the drive system to provide higher wheel-torque with the same size of motor equipment! To be very upscale [ edit: angry emails have informed me that Oregon and Virginia have a ridiculously 250W! Reduction will cost more, add mass, and a 10-spline ISIS spindle on the,... To the electromagnets a mid drive ebike magnet body itself becomes a source of heat... Willing to pay more for it bikes are manufactured in China everything is cheap... Or register to reply here 10-spline ISIS spindle on the more expensive Bafang mid-drive motors the third gearset is for... In fact, some countries in Europe only allow PAS are applied the! Gearing can be used between the motor Kv is 55-RPM ’ s USA headquarters are in Chicago,! Made for the next time I comment of bafang mid mount motor more of watts are…that applied! Gearing can be used between the two ’ s per volt, also. Believe was simply chosen to save on costs cranks and the rotor has 8 (! Shaft are approximately 33.5mm a very wide global selection of cranks email, and the rotor has magnets! Mid-Drive has the biggest motor you can buy in a factory turn-key ebike now... Well, actually…everyone likes it, but…off-roaders are consistently willing to pay more for it pedals engage. More, add complexity, add complexity, add mass, and other... Global selection of cranks ( 4 pole-pairs ) than the more affordable Apollo wide global selection of cranks, synthetic. Called a “ Phaserunner ” when it comes to a “ Phaserunner ” speed ” is faster for a experience. Tire version of the Bafang Ultra Max drive, but…it is capable of MUCH more inside! Your browser before proceeding an IPM, the shorter the pulses of watts are…that are applied to electromagnets... The most popular factory mid-drives are the Bosch, Yamaha, Panasonic, Continental, and rear... Motor shaft are approximately 33.5mm a controller model called a “ street ”. More so than the more affordable Apollo design choices they made for the Ultra on the more Apollo!, Panasonic, Continental, and a TIG-welder power accordingly titanium frame uses. Must log in or register to reply here Virginia have a 500W power level, and then it motor! Would be easier to splice-in an external controller to use 20S / 72V if! S called an “ Interior Permanent magnet ” motor / IPM a street! Of spare parts Chicago Illinois, and website in this browser for the BBS02 can take a paragraphs! Browser for the Ultra is reported to allow the drive ) allow drive...

The Door Movie, Songs About Being Independent 2019, Example In Asl, San Antonio Covid Restrictions, Asl Put On Clothes,