Kingfish
100 MW
Greetings
For months I have be intrigued with the passive regen from my Infineon 6FET; without any special modification I would pick up a few tens of a volt on a long downhill; nothing to write home about. Finally this weekend I got around to shorting the BK to GND pad on the reverse side of the board to enable (pure) regen braking/ebrake via a momentary switch. The results from a diagnostic hilly ride went as follows:
P0 configured as 10S3P. CA recorded trip params as...
(Start-V and End-V are my notations.)
Max Regen: slightly less than 500W @ 34 mph
Regen on flat, pedalling hard above boundary condition @ > 20 mph ~= 200W (to determine External Power)
Other factors -> ASV file:
Notes:
Last week I noticed that when at WOT with Speed-1 at 110 and climbing a steep hill that if the grade became steeper and causing a loss of momentum such that the speed dropped below 25 mph the motor would drop-back and suddenly loose 4 mph, as if the forward-winding charge was lost.
Therefore, does setting the Speed-1 above 100 affect regen, creating a two-speed difference possibly in the same manner of how setting the parameter above 100 charges the forward windings?
Observed: Slowing below the boundary condition profoundly increases the regen effect, and yet when above the condition the forward charge is less capable, weakened, lacking full field strength.
Make sense? Does anyone else experience this phenomena?
For the record:
The only mods to this particular controller are power/phase trace-fattening (10AWG), Battery input wires to 10AWG, and replaced three 63V caps with 100V.
~KF
For months I have be intrigued with the passive regen from my Infineon 6FET; without any special modification I would pick up a few tens of a volt on a long downhill; nothing to write home about. Finally this weekend I got around to shorting the BK to GND pad on the reverse side of the board to enable (pure) regen braking/ebrake via a momentary switch. The results from a diagnostic hilly ride went as follows:
- From dead-roll at the top of my hill (>6% grade), regen builds to about 250W until the speed exceeds roughly 16 mph (boundary condition). After reaching the boundary the regen drops between 1/3 to 1/2 and the speed instantly accelerates as if letting off from a good braking effort though still with slight drag remaining.
- On subsequent downhill tests at various speeds up to 34 mph light regen was noted until the vehicle was slowed below the boundary condition which led to an immediate doubling (or tripling) of the regen braking. This effect was consistent through my entire 25 mile hilly test.
P0 configured as 10S3P. CA recorded trip params as...
Code:
Ah Start-V End-V W-hr Wh-mi Regen R-Ah Fwd-Ah
13.31 40.9 32.1 498.49 19.4 3.70% 0.493 13.809
Amin Amax Vmin MaxS AveS Time
-14.3 33.4 29.6 34.7 21.3 1:10:09
Max Regen: slightly less than 500W @ 34 mph
Regen on flat, pedalling hard above boundary condition @ > 20 mph ~= 200W (to determine External Power)
Other factors -> ASV file:
Code:
1:EB806
60
24.0
30.5
0.1
99
1:Cycle Mode
115
80
60
1.0
2.0
1:Only fake Indicate
1:Comm GND
2
15
- Last week I went for a ride with P0 configured as 10S9P. Small changes to AVS were Phase = 75, Rated = 30, Speed-1 = 110%. MaxW ~= 1356, MaxS was > 34.5, climbing steep hills at 26 mph, but range reduced to 70 miles.
- Resolved to increase range by dropping Phase to 60 and Rated to 24. Starts from dead stop were slower though continued to build to MaxS; did not detect a difference between setting Speed-1 from 110 to 115, nor were any depreciating artifacts noticed.
- With the previous weeks’ configuration there was a profound jump in max speed in WOT as the controller hit the 110% rating; this was hardly noticed with the lower Phase/Rated current settings likely due to the WOT Wattage being close to 860-990 on a flat.
Last week I noticed that when at WOT with Speed-1 at 110 and climbing a steep hill that if the grade became steeper and causing a loss of momentum such that the speed dropped below 25 mph the motor would drop-back and suddenly loose 4 mph, as if the forward-winding charge was lost.
Therefore, does setting the Speed-1 above 100 affect regen, creating a two-speed difference possibly in the same manner of how setting the parameter above 100 charges the forward windings?
Observed: Slowing below the boundary condition profoundly increases the regen effect, and yet when above the condition the forward charge is less capable, weakened, lacking full field strength.
Make sense? Does anyone else experience this phenomena?
For the record:
The only mods to this particular controller are power/phase trace-fattening (10AWG), Battery input wires to 10AWG, and replaced three 63V caps with 100V.
~KF