Voltage spike when throttle is released.

riwi77

1 mW
Joined
Feb 25, 2017
Messages
13
Hi!

Got my me1616 running with a Sevcon gen4 size 4 72/80V. At first I had some trouble with the encoder and phase wires but after I figured that out i was able to spin the motor in fwd and rev-direction.

I still have one issue and that’s a overvoltage fault that’s being triggered when I pull pack the throttle and let the motor spin free. When the torque demand is decreasing there is a voltage spike that exceeds the 116V rating of the Sevcon controller. This triggers a fault in the controller disconnects the main contactor.

spike.png


If I slowly pull back the throttle to zero, there is no fault triggered.

I have set the torque demand for neutral braking to zero:

baseline.png


Any ideas on what to go after to limit or remove the spikes?

BR

Rikard
 
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