Bafang current decay. If you want to push the envelope and have fun.

Bafang current decay 5mohm equivalent resistance. The recommended setting is 4-8. RPM. Version 2 is a riff on Version 1 above. 5” tires, front sprocket 32t, rear is IGH (12t-29t). Best to leave below 100 and use throttle as 100% ‘boost’. The relevance to your Current Decay(1-8): 4 \ 8 \ 6 \ 8 \ 8 – Determines how high up the pedal cadence rpm range it starts to reduce power, 8 being the highest. With high and low power versions, you'll find the perfect power source for your ride. So the pedal assist levels are on the Basic page. After downloading the application and connecting your mobile Bafang motor needs to pedal backwards to cut motor . The 2020 Bafang Ultra controller is stable, efficient and easy to program. The company focuses on all global e-mobility trends of the future: whether for individual e-bikes, e-scooters or for public bike-sharing schemes. https://forums. 1 Firmware Ver. 4 inch screen, it supports 3/5/9 PAS levels, and 12/32/48/60V. Now as far as stop decay affecting the current applied during PAS - that's got me puzzled. that lasted about 45-50 miles and indicated speed range between 20 mph and 26 mph as the battery decay. Top. Load File: Save File: Download. Current decay refers to the process by which the electric current in an RL circuit diminishes over time after the power source is removed or switched off. Also Current Decay and Keep Current are often explained wrong as being related to pedal cadence current decay: 5 stop decay: 100 keep current: 60% THROTTLE: start voltage: 11 end voltage: 42 mode: current designated assist level: 9 speed limit: 25kph The example I cut up is actually a third throttle labeled also "Bafang" that came with a male rather than female harness and could not be installed. This is a big one. Guide written for windows 7 64bit operating system Current Decay – Measures how long the unit holds power level when pedal effort is decreased. Current Decay (1-8) – This parameter sets how fast the current drops when you are pedaling fasted and are reaching the maximum speed at the selected assist level. Current Decay at 8 and Keep Current at 80%, so it didn't fade if I slowed going up hills. Feb 12, 2023 #5 Have tried tried tightening brakes a little and also changing Current Saved searches Use saved searches to filter your results more quickly Much guess work has been done there. Bafang Max Drive M200 Bafang Max Drive M410 Bafang Max Drive M500 Bafang Max Drive M510 Compatible with: SpeedBox App Not compatible with: Displays with UART connectors Bafang Max Drive M300 Bafang Max Drive M400 Bafang Max Drive M420 More . Sort by: Best. Read All Write All. The "Current Decay" This is an attempt to decipher the protocol which is used by Bafang Pedelec Motors like BBS01 or BBS02 and provide a python tool/library to communicate with these devices. You can read more about this on this thread. I think it would be a lot smoother if the motor kept a steady power draw (even below Ideally you would want 2 x 48v nominal lithium pack of 13A ( but not the all cell kind, they don't support the required draw under load) which in parallel would give you 26A - the current limit on all 750w bafang bottom bracket drives yet that I have seen and tested. If it is set to the maximum of 8, Current Decay is minimized almost to the point of eliminating it entirely. Current Decay (one of only two changed settings) has been set to the maximum of 8, which either minimizes Current Decay, or eliminates it entirely (Bafang isn’t giving anyone any help figuring out which, or when). Higher is the value of decay constant ,lower will be the rate of change of current and Bafang, one of the leading manufacturers of e-mobility components and complete e-drive systems, has been developing solutions for electric vehicles since 2003. I haven’t been reading up on these things much since I first started programming these motors, and have really been trudging along fiddling with current % and the PAS settings like current decay. Explore enhanced BBSHD programming for pedal assist settings that don't let the bike run away from you, and throttle settings gentle on the drivetrain. Remember, There is no one perfect suite of settings for the Bafang BBSxx series of motors. Some people suggest 100% is good, but it will eat more battery. This way, the "top speed" of a given PAS level can be quite varied, via gearing + how fast I wanna spin, moment to moment. During this process, the inductance of the circuit plays a crucial role in opposing changes to the current, leading to a gradual decrease rather than an instantaneous drop. Current Decay 2. C omponent Location T he controller current sensor is installed in the controller. There is no detail on actual rpm speeds for the Current Decay – Measures how long the unit holds power level when pedal effort is decreased. Makes perfect sense. I would assume that the values While most of the discussion of Bafang Ultra motor's settings revolves around the somewhat cryptic Torque Tab, the Basic Tab, on which you set up your PAS Menu. I would probably agree that the Bafang controller is not the latest and greatest but it seems satisfactory for the task. Reducing the equivalent resistance by adding another 5mohm shunt, will mean an actual 45A limit (with 30A programmed), and you can of course, add more shunts, to further reduce the total shunt resistance (reducing the shunt value to 50% of standard, means Bafang Ultra M620 bikes are often criticized for a lack of smoothness and responsiveness, but that's nothing a bit of tuning can't solve! Current Decay(1-8) in the middle gives it a smooth ramp off in power. So, forget that one. Its like hitting a wall power assist wise when you are hill climbing. The Bafang will begin to dial back the power as your pedal cadence approaches the Limit Speed. An example is Stop Decay. 6Ah, charged 54. That is pure BS that a different throttle would void any warranty, but of course it has to be manufactured with the proper connector for the Bafang. My bike has 26 ”wheels, 2. 4 for Start Degree, Undetermined for Work Mode, 25 for Stop Delay, 8 for Current Decay, 0 for Stop Decay, and 60 for Keep BaFang MotoController Debug Port COM4 Bandrate 1200 Maufacturer HZXT Model SZZ9 Hardware Ver. i have a bafang bbs01 750w and the battery is 48 v – 20 amp. Great! We are so fortunate that the Bafang platform is so easily accessible now for BaFang MotoController Debug Port COM4 Bandrate 1200 Maufacturer HZXT Model SZZ9 Hardware Ver. I agree that the Bafang PAS system is a form of cruise control; just an on/off, yes/no approach, with adjustable current limits. Most likely, On flat ground, a Current Decay of 4 is indeed part of a cyclist-friendly exercise regimen where power gets cut as cadence increases. Yeah, thanks for the clarification. Especially for Start Current %, Keep Current %, and Current Decay. If you find yourself using pedal assistance at the top or bottom of the range, you might want to change all of In my first post, I mentioned the 'Keep Current' parameter. 25 is the Factory setting and I haven't made any changes to settings that show no sign of being a problem. My first thought is that an exaggerated stop decay setting (1100 in this case) might be interfering with pre-programmed acceleration curves at the firmware level. Unfortunately it is For LR circuit, decay constant is, τ L =L/R ---(11) Again from equation (8), This suggests that rate of change current per sec depends on time constant. Mine from the dealer was set at 20%. If you have priced some of the other controllers it looks a great deal. Bafang has released a new beefy drive unit that can run at a variety of voltages with no speed limits and that programs using a similar cable and I was hoping for a m620 UART firmware that doesn't have as aggressive of a power save mode than the current stock one has. ) - 5 Stop Delay [x10ms] - 5 Keep Current Current Decay(1-8): 4 \ 8 \ 6 \ 8 \8 – Determines how high up the pedal cadence rpm range it starts to reduce power, 8 being the highest. Reducing the equivalent resistance by adding another 5mohm shunt, will mean an actual 45A limit (with 30A programmed), and you can of course, add more shunts, to further reduce the total shunt resistance (reducing the shunt value to 50% of standard, means The only thing to pay attention to is on the first page the Limited Current(A) should be set to 30 amps if you have a Non-Ludicrous 1000W Ultra Max to get maximum power. B540. Manufacturer: Model: HW Version: FW Version: Voltage: Max Current (A) Basic. 568. Bafang programing cable - Available here on Amazon or here on eBay. top speed = 70km/h max current = 18A start current = 5% keep current = 60% slow start mode = 4 startup degree = 4 current decay = 8 time of stop 2006 Dahon Helios P8 folding bike with 20" wheels + Bafang BBS01B + 19. Current Decay * 11: Stop Decay (0x14 -> 20) * Integer: *10ms * 12: Keep Current in % (0x14 -> 20) * 13: Checksum ? (0x27) ## Command: Read Throttle Current Decay Stop Decay Keep Current This is on a typical BBS02 Bafang motor, using a cadence sensor. At the moment, once you drop below 47V (with 52V controller/motor), you are limited to 13A power draw (43% of your current limit). What does Current Decay actually do, and why is Zarquon different at different cadences? Current Decay(1-8): 4\8\6\8 – Determines how high up the pedal cadence rpm range it starts to reduce power, 8 being the highest. Open comment sort options. cutting off the current? I have a BBS02 connected to a single speed belt, but it has a problem of spiking and the motor cutting off. Have done a lot of searching and reading, but this seems like a fairly unusual situation. 2. On DC motors, where a Back EMF develops as the motor rotates, slow decay mode offers a short to the winding, which in turn shorts (collapses) the Back EMF. Forums current decay 4 stop decay 0 keep current 30 . Bafang 500W/48v on old Apollo MTB. 1 Nominal Volta 48V Max. Determines how high up the pedal cadence rpm range it starts to reduce power, 8 being the highest. Current Decay(1-8): This sets how fast the current decay when pedalling stopped or you are reaching the maximum speed at the selected assist level. So labels in the software might be misleading, maybe lost in translation from Chinese to English. Lower is faster. What's new Search. Throttle Handle INITIAL READ VAL Start Voltage(x10 11 11 End Voltage(x100 35 38 It is by far the cheapest programming cable have seen for sale purchased directly from Bafang, they seem to work flawlessly with Windows 7/8/8. If you read the display user manuals you will see that Bafang state what version controller firmware, say V4, that display is compatible with. I tired Stop decay 100, and I agree, it's smoother, especially in stop-and-go using higher PAS levels. Is there a way to reprogram a Bafang BBS02, to keep the current draw at a steady state vs. 2/25. Background Doesn’t seem to be a lot of info out there yet on configuring the Bafang Max Drive even though e-bikes with this mid drive are becoming more Home. Stop Decay [x10ms] – Current Decay (1 – 8): I changed from 8 to 6 Keep Current(%): I changed from 60 to 50 (On the Throttle Page) First, the Bafang geared hub motors rarely (if ever?) use Bafang controllers that are programmable like the Uart based Ultra and BBSXX mid drive motors. My feeling is that it works in conjunction with Keep Current and it is the current fall off time in between the PAS sensors input to the controller. 3 Mixed Decay. I'll add that when stopping or wanting to slow down you are breaking so the motor has stopped already. the "current decay". Stop Decay (x10ms): the amount of time the system takes to cut after pedaling stops. People have to remember none of what we know about programming the BBSxx is via Bafang documentation. Share Add a Comment. I now have it at 80%. Stop Decay – The amount of time the system takes to I feel Bafang is discarding a lot of existing customer base and potential market share, to comply with badly phrased regulations their competitors are just sidestepping anyway. Best. Lower value means the current will start to drop at lower speed. Screen 3 of 3: Throttle. Would be really nice to see them start doing that IMHO. I'd be interested in your impression of this as well with you being the Saint of all things Bafang bafang USB Programming Length 1M Cable for 8fun / BBS01B BBS02B BBSHD Mid Drive / Center Electric Bike Motor Programmed Cable,Bafang 8FUN Mid Drive Motor Kit, Current Decay (1-8) Stop Decay (x10ms) Keep Current (%) Start Voltage (x100mv) End Voltage (x100mV) Mode. This behavior is characterized by an exponential decline in current Thats different with bafang m500/m600: The motor is the same, even between m500 and m600. As you can see; the cadence sensor is controlling a lot of different timing cycles that could be incorrectly set, and that's not including your PAS settings. Open serial port Close serial port. Current 25A READ READ FLASH Current Decay(1-8) 8 4 Stop Decay(x10ms) 0 0 Keep Current(%) 60 60 CUSTOM SETTINGS. C onditions for Running the Diagnostics A fter the system is turned on, the diagnosis runs continuously. 05106011 + Bytes Value\n05106012 + Bytes Value\n05106017 + Bytes Value\n05106018 + Bytes Value\n The latest EDK01 has 2. Forums. It offer wide range of input voltages Current Decay(1-8) changes behaviour as well but only at Keep Current (%) values of less than 100 as far as I can tell. Region Canada. Current Decay (1-8): Determines at how high of a pedaling RPM the motor starts backing off the power. It works well on 8. c-stop-decay-excellent-motor-refinement. Or 1, even. Thats different with bafang m500/m600: The motor is the same, even between m500 and m600. Before you do any of this be sure to write down your current settings. Keep Current – Specifies the total amount of power available in PAS mode. The programming is a little esoteric to me - but with 60% - I'm losing power at a Current Decay: 8 – I set this as high as I could because I didn’t WANT the BBS02 to provide less power if I pedaled faster. So, I'll need a 48t-to-11t cassette to go with a 46t chainring, etc. Read Write. I'm an auto technician currently working for BMW. C Hide your power! This mid-sized downtube battery packs 540wh of long-lasting power for a wide range of ebikes, from the stylish eCity to the eTour. at a given support level. There is no detail on actual rpm speeds for the Current Decay setting. As I said, I believe the 'Keep Current' parameter steps down the current, to a percentage of the PAS 'Limit Current' setting on the 'Basic' page of the controller program. Stop Decay [x10ms] – The amount of time between the moment you stop pedaling and the moment the motor stops. CurDecy replaces Current Decay KeepCur(%) replaces Keep Current(%) And separately, 0 Speed Boost Time (x10ms) replaces Slow Start Mode I think what Bafang did is including the Pedal Tab precisely to get the Bafang BBSxx Configuration. Speed Limited. Looking at the notes for this "current decay Switching my Keep Current and adding that 28T - I am an electric billy goat on the trails now. Setting Current Decay to a middle-ground of 6 versus the '2' its normally at (not the full-blast '8' on the hill config) brought PAS strength back to a peak of Another good change was to raise the KEEP CURRENT which is set in the Pedal Assist tab. Thanks for the tip! Now I invite you to try my "Basic" Assist levels. 43833/ current decay: 5 stop decay: 100 keep current: 60% THROTTLE: start voltage: 11 end voltage: 42 mode: current designated assist level: 9 speed limit: 25kph The example I cut up is actually a third throttle labeled also "Bafang" that came with a male rather than female harness and could not be installed. Bafang intube batteries are perfect for any type of bike. This has a bearing on the motor's total output, even though it shouldn't. Lower value means the current will start to drop at lower slower/more gradual. The lower this setting is the sooner the drive unit will start cutting back on the power as you pedal faster. Low Battery Protect (V) Current Limit (A) Wheel Diameter: Speedmeter Model: Speedmeter Signals: Assist Current (%) Speed (%) Pedal Current Decay(1-8): This sets how fast the current decay when pedalling stopped or you are reaching the maximum speed at the selected assist level. On a side note, I don't fully understand the reasoning from Bafang as to the need for CANbus in the first place. The holder supports 22. It is by far the cheapest programming cable have seen for sale purchased directly from Bafang, they seem to work flawlessly with Windows 7/8/8. These two settings define the shape of PAS power curve vs. Having high cadence reduce power assist makes a lot of sense on flat, paved ground, but when you are set in a granny gear and pedaling like mad to crawl T he controller current sensor is used for overcurrent protection. Apr 24, 2023 #17 Armourd said: I tend to ride with my Bafang BBS02 in PAS 1, but I’m finding even that to be too much power when i need to ride slowly due to trail conditions or slow rolling riding buddies. but i live in a place where this potential is ilegal and I want to Much guess work has been done there. And I agree that setting PAS speed levels to 100% can somewhat simulate a power mode. It’s been around seven or eight years now, thousands of people have programmed it hundreds of thousands of times, lots of videos, articles, and I have a Bafang BBS02B (48V, 750W) with a 48V battery (13s6p, 17. PAS settings can be controlled as Speed or Current as percentages. 4 for Start Degree, Undetermined for Work Mode, 25 for Stop Delay, 8 for Current Decay, 0 for Stop Decay, and 60 for Keep Keep Current = 100%, effectively disabling the cadence limit. Info. jpg. Note: Also make sure that Stop Decay [x10ms] is set to 0 or at least is not set high, this one enables smooth power decay during given amount of time after pedalling stops, I prefer zero for more predictable PAS behaviour. They all have closely spaced current levels in the pedal assistance settings, so they can be used to hold a consistent speed with consistent pedaling effort. For many they have succeeded. Great! We are so fortunate that the Bafang platform is so easily accessible now for Any Bafang dealer that sells parts should be able to supply one. Current decay(1-8)Link. Stop Decay – The amount of time the system takes to cut after pedalling stops. 0. After I get the speeds where I like them for PAS, I plan to play with 'Current Decay' and 'Keep Current' settings to see how they affect the feel of the PAS. But I haven't experimented with, or even studied Current Decay at all, and cannot comment on how that would affect the riding Bafang, one of the leading manufacturers of e-mobility components and complete e-drive systems, has been developing solutions for electric vehicles since 2003. This results in a very quick rotor stop. Return to The manufacturer used a Bafang motor that according to them came locked (restricted to 25km/h) as standard and is telling me there's no way to unlock it as this needs to be done during production. Increasing the front chainring size, without increasing the first gear on the cassette, would make takeoffs feel jerky, due to the lowest functional motor RPM equaling a fairly brisk pace at the wheels. It is plug and play not ‘plug and pray’ like your cheap crappy homemade cables will be. For the same reason, Stop Delay / Decay are set as low as possible. Also Current Decay and Keep Current are often explained wrong as being related to pedal cadence Problem is, the bike is a single speed, with a 64x20 single gear carbon belt. Lower value means Current Decay acts, effectively, as a volume control that goes from 1 to 8. Throttle Handle INITIAL READ VAL Start Voltage(x10 11 11 End Voltage(x100 35 38 I'm wondering if anyone has played with Stop Decay beyond the typical 0 - 10 setting. Bafang Max Drive M300 Bafang Max Drive M400 Bafang Max Drive M420 UART/ CAN protocol More . But your program has really turned things on Bafang has gone to some lengths to make the result of the PAS settings what they think their customers want. And so I'm really confused on good Bafang Pedal settings. The controller is the same for all m500 and m600 voltage versions, the voltage is firmware only (thats also why the voltage and amps are an added sticker besides the actual serial number). Current Decay – Measures how long the unit holds power level when pedal effort is decreased. If you want to push the envelope and have fun 05106011 + Bytes Value\n05106012 + Bytes Value\n05106017 + Bytes Value\n05106018 + Bytes Value\n I want to buy a Bafang 750w, The bottle battery has only 10 amp max continuous discharge current, so it is only good up to 500 watts. Combining the latest technology and years of industry know-how, we have developed lightweight, fast-charging, long-life batteries that provide the highest level of efficiency. Strangely, the throttle settings are on Programming Bafang BBS01/ 02 - A Brief Guide Note. At the same time, this is a multi-functional eBike display that supports Bluetooth, 8 languages, navigation (fee required), ODO function and And with Stop Decay it can be set as low as 0. Product code: SB32BT_BAF_1pcs_BOX Shipping and Payment 05106011 + Bytes Value\n05106012 + Bytes Value\n05106017 + Bytes Value\n05106018 + Bytes Value\n Performance engineered, Bafang batteries always get you there. you could try setting the -current limit [A]: to 16-Assist 0 - 1 & 1-Assist 1 - 8 & 9 -Assist 2 - 9 & 18 **Before you do those changes be sure to have your "Max speed road" set to 18mph** Start Current - 8 Start Degree (Signal No. KEEP CURRENT is the factor which controls what the controller does when you reach a steady speed of pedalling. V1. It comes standard with a pair of 5mohm shunts, so that means 2. Basically it is a what I call speed mode, a kind of loose cruise control, with speed limits at each PAS level and decreasing power at higher cadence (pedal RPM). 3 KB · Views: 362 Armourd New Member. Attachments. My PAS 1 seems to top out at 156 watts frequently, unless I'm pedaling HARD (when I should be going to PAS 2). With the Ludicrous controller the amps are doubled and it ships from the factory with Limited Current(A) set to 25 amps which really delivers about 50 amps to the drive. From intube to racktype, . During a mixed decay recirculation mode, current is made to decay towards zero faster than on slow decay With the 1000W nominal Bafang Ultra Max drive unit all that has changed. I already know it is possible to Figure 2-4. I have a theory about this setting, as to why Bafang have set it to 60% on the 48v 750w 25A unit. I also: Lowered Start current from 40 to 20, to Current Decay(1-8): 4 \ 8 \ 6 \ 8 \ 8 – Determines how high up the pedal cadence rpm range it starts to reduce power, 8 being the highest. 4mm handle bar. It is very frustrating and jarring. Designated Assist. Lower value means the current will start to drop at lower slower/more Programming your bafang motor controller is going to improve the efficiency and performance with your specific bike and battery by setting battery Low voltage cutoff, Max Current, wheel size, PAS settings, throttle, etc. (Current Decay = 8). New New (unread) Members. ‘Counterintuitive’ is the name of the game when messing with your Bafang motor settings. Current Decay(1-8) [1-8] Stop Decay(x10ms) [numeric] Keep Current(%) [%] THROTTLE HANDLE Start Voltage (x100mV) [numeric] End Voltage (x100mV) [numeric] Mode: [Speed, Current] I'll want to keep the first few gears near the same ratio. torque. The current to the motor is also affected by “Keep Current(%)” and Current Decay (1-8)”. All of the tools to do it are factory unsanctioned and open source. Current Decay. 2ah LG MH1 cells my (electric) wheels. Stop Decay(x10ms) very low makes power drop off quickly when you stop peddaling. Version 2. Pedal Assist Screen: Set Current Decay to 2. Current decay helps decide when your motor cuts power based on your cadence. Registered members Current visitors. Everything comes from experimentation and I'm wondering if anyone has played with Stop Decay beyond the typical 0 - 10 setting. It looks like Bafang is selling future BBSHD units with a gear sensor plug built-in but you will need to buy a gear sensor from someone else to make it actually work. Registered members Current visitors New profile posts Search profile posts Ebike Reviews Log in Register. electricbikereview. Keep Current = 100%, effectively disabling the cadence limit. I'd be interested in your impression of this as well with you being the Saint of all things Bafang Any Bafang dealer that sells parts should be able to supply one. BT F870. 1. 6V). Bafang itself is not very helpful when it comes to exact explanations of the parameters. This can be changed using the "Stop Decay" setting in the Bafang Programming software. Ultra Tuning: Power is Voltage * Current, right? Thread starter smorgasbord; Start date Mar 16, 2023; smorgasbord Current Decay (1-8) Stop Decay (x10ms) Keep Current (%) I say those are "legacy" because they were first created for Bafangs BBSHD and similar motors that don't have a torque sensor. Bafang Forum . Jan 8, 2023 16 7. I haven't read any reason to change this. New I just checked - and it looks like I had Keep Current at 60% and current decay at 8. This makes sense when riding in steep hills. Current decay time - 0 5ms: 42: 1: 6012: Current decay time - 1 5ms: 43: 1: 6012: Current decay time - 2 5ms: 44: 1: 6012: Current decay time - 3 5ms: 45: 1: 6012: Current decay time - 4 5ms: 46: 1: 6012: Current decay time - 5 5ms: 47: 1: 6012: Maximum pulse Width of pedal speed - 0 2ms: 48: 1: 6012: Maximum pulse Width of pedal speed - 1 2ms There’s a lot of content available when it comes to the Bafang BBSHD. Product code: SB13BT_BAF_1pcs_BOX Shipping and Payment. ulm kaogk anry mlizgw ewrmh pxyd fochr wlhtjk nsyq pqouuc