SINEWAVE GRINFINEON CONTROLLER MANUAL
Rev 2.1
-17-
4.3
60 Degree Hall Timing
Most brushless motors use 120 degree hall timing, where at any given point
there is always at least 1 hall signal that is high, and 1 hall signal that is low. But
some motors use 60 degree hall spacing, where 000 and 111 are also valid hall
patterns.
The Sine Wave Grinfineon controller will not work in sensored modes with
brushless motors that have 60 degree hall timing. If your motor has 60 degree
halls, then you will have to run it sensorless and leave the halls unplugged.
4.4
No Change to Internal Settings
For a number of reasons the controller's internal settings for low voltage cutoff,
battery and phase current limits, max regen current etc. are fixed in the controller
IC and can't be reprogrammed by the user. The fixed values are sensibly chosen
to be around the maximum allowable range for flexibility while keeping the
controller in a conservative operating area.
If you want to further limit these settings for custom low voltage rollbacks or
current/power limits, then either a V2 or V3 Cycle Analyst will provide that
functionality and a lot more just via modulation of the throttle signal.
4.5
Max Regen Voltage
The maximum regen voltage is set to ~58V for the 25A and 35A controllers,
allowing them to work with up to 14s (52V) lithium batteries, but without risk of
high voltage spikes if the battery BMS circuit trips.
The 40A controllers have a maximum regen voltage of 88V, allowing them to
work with 72V (20s) lithium and LiFePO4 batteries.
This upper voltage regen cutoff is critical to prevent damage to the controller if
ever the battery is disconnected during regenerative braking, since the regen will
stop abruptly before the voltage has a chance to spike. It is also higher than the
full charge voltage on most battery packs you would use, and there can be a
possibility of overcharging a battery if you start with a full charge at the top of a
hill and your battery's BMS circuit does not have an overvoltage cutoff.
In that scenario it is prudent to have a Cycle Analyst or other volt meter to keep
an eye on the battery voltage level. In practice you will almost always consume
many more amp-hours than you put back in while braking and overcharging from
regen is not much of a concern.
