Recent content by ctirad

You have to make absolutely sure you have a correct motor pole pairs set, at least rougly, set the motor Ke constatn, correct hall/phase sequence and aligned encoder (halls in your case). Without that make no sense to try anything further. I usually use these steps: 1. set all speed(!) gains...

QSMOTOR, do you plan to alternativiely equip your MID motors by SINCOS encoders instead fo halls?

Hooyi HY3712 IS chinese part. And I don't care if it has 30% worse Rdson than the top class part with several times higher price. The 100A BMS cost me 100$, used on 8kW 90V motorcycle and its heatsink is barely warm after a long ride. Of course, but that is not the point.

Did you make the phase/hall (encoder) alignement? If so, check the motor constant is set correctly.

I didn't talked about any copies. I just pointed out that for the part name "HY3712" there are two diffent mosfets components from a two different (chinese) manufacturers, that have completely different specs. According to the printed logo, the right one is the Hooyi HY3712, that is 120V, low...

Me too (see the link above). I'm pretty sure there are two completerly different HY3712 parts that only share the same codename. And I think even the lowend chinese manufacturers are not complete idiots to use 250V 450mOhm mosftet for the ~100V/100A BMS. Or just compare the manufacturer logo...

The channel is fine, when I set 26s to 30s, I can see all 22 values. I think that 22s is not divided as 11s + 11s between the AFEs, but rather 12s + 10s. I'm going to figure it out. EDIT: OK, tested. For 22s, the first half (from the B-) has to be configured as 12s and the second half aos 10s.

Unforutnately, it does not seem to work. After modifying the solder joints, reorganising the cables and resetting the BMS to 22S mode, the cell 11 reads near zero Volts. The reading of the other 21 cells seems correct. I have to check the datasheet, if the table is valid also for a daisy...

Are you sure? According to datasheet there http://boorzia.com/download/HY3712.pdf the HY3712 are 125V/170A with Rds(on) of 6.3mOhm. That sounds to me as an exellent choice, especially for the price. But there are 36 of the mosfets in my BMS (40 when I populate the missing 4), thats 200$ just...

Thank you rolf_w.

Does anyone know what joints to add/remove for the 22s configuration?

Thank you, both. Unfortunately, the axle is a part of the startor on the HUB motor, so no way how to use chips like AS5047P. On the other side, the solution with the two linear hall sensors and the magnetic ring looks doable. The Sevcon manual says the encoder should output a single sinus (and...

Anyone tried to add sin/cos encoder to the standard HUB motor? It is even hypothetically possible? We have a long standing problems with the Sevcon Gen4 + QS motor (hubmotor wih halls). The problem is the Sevcon often (depending on the actual angle of the motor) misreads the halls at zero and...

The main chip ATA6870N is no more produced, thus any further development doesn't make much sense.

Hi all, I have a couple of questions about the Sevcon Gen4 that are not clear from the manual: 1. It is possible to set the directional throttle for the variable regen (Vectrix style) and also as an forward/reverse throttle (when a vehicle is staying) in the same time? 2. How to properly...