Search found 9 matches

by MercyFlush
Jan 29 2020 12:44am
Forum: E-Bike Non-hub Motor Drives
Topic: 1.7kg 1000w mid drive
Replies: 56
Views: 8092

Re: 1.7kg 1000w mid drive

I think people are missing the fact that this is used by RockyMountain on their mid drives and it works very well. By far the best responsiveness of any I've tried. Thanks, I'd never heard of those motors. Very high torque for a 250W euro-spec! The following review describes the torque sensing "as ...
by MercyFlush
Jan 28 2020 5:54pm
Forum: E-Bike Non-hub Motor Drives
Topic: 1.7kg 1000w mid drive
Replies: 56
Views: 8092

Re: 1.7kg 1000w mid drive

The advantage here is that the measurement is very direct: from chain deflection to torque sensor signal. Plus it's amplified at the beginning because a ita takes a very small force to initially move the chain. Bottom bracket sensor adds weight, complexity and cost. Because of how the system is con...
by MercyFlush
May 10 2019 5:44am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4082
Views: 376989

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

It doesn't, it starts at ui32_time_ticks_between_pas_interrupt_accumulated>>3 which starts at timeout, not at 0 as in your code. You can let it start at timeout <<3 which would be more correct but I doubt that solves your problem. Ah, yes you are correct accumulated starts at Timeout, thanks for th...
by MercyFlush
May 09 2019 6:47pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4082
Views: 376989

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

ui16_time_ticks_between_pas_interrupt only gets updated when ui8_PAS_Flag == 1 otherwise it keeps it's initial value of 64000L. ui8_PAS_Flag only gets to 1 if there was an interrupt on the PAS__PORT which is GPIOD which is address GPIOD_BaseAddress which is 0x500F For what you describe to happen yo...
by MercyFlush
May 09 2019 4:36pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4082
Views: 376989

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

No cadence -> no current. If you have no PAS sensor time_ticks always goes to max, same as if you have one and are not pedalling. Otherwise everyone else would have your problems at standstill. Do you understand that it takes about 300 cycles for time_ticks to reach max as it starts at 0? That it w...
by MercyFlush
May 09 2019 9:14am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4082
Views: 376989

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

I would just first debug the ADC values for a long time after startup (via diagnostics/printf) and see if they behave funny. BTW are you sure that your controller does 10bit ADC and not 12, 16, whatever? that would explain a lot. So debug them as 16bit. So after about 9 hours debugging and tracing ...
by MercyFlush
May 06 2019 7:23am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4082
Views: 376989

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

So I have my 18FET KT60SVP and it weirdly the high side and low side drivers are identical to the 48v 12FET I have. Perhaps this is something we should add to the WIKI for those with >48v controllers to check if the polarity config matches their hardware as it doesn't seem to be consistent based on ...
by MercyFlush
Apr 29 2019 4:57am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4082
Views: 376989

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Has anyone had luck in sorting the High/Low side polarity of the 60V/72V SVP's?
I have just picked one up (KT60SVP) and am not wanting to pop any transistors or mosfets :)
by MercyFlush
Feb 10 2019 3:22am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4082
Views: 376989

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Hi all, new here and looking for some direction. So I'm building a ~3-4kW peak BHT style mid drive direct drive ebike and am hoping to use a KT controller with this firmware, however I am not sure what kind of phase amps I could squeeze out of it. My goals would require about 120A phase Amps. I see ...