DRV10987: DR10987 EVM close-loop operation not possible

Part Number:DRV10987

Hello,

I'm tuning the parameters using the SLOU477 DRV10987 Tuning Guide.

My motor is running in open-loop mode at around 1/3 of the max. speed, but when I try to uncheck the CLoopDis checkbox, the motor stops immediately and the fault code is current limit.

Is the DRV10987 too weak for this motor, or am I doing s/th wrong?

Motor specification:

24VDC, 40000 rpm (free running), 0,17 A (free running), 38000 rpm nominal, max. 5.3 mnM, max. 1,10 A, max. 21 W, 5.7 mNm/A, 1682 rpm/V, 1.30 Ohm (phase-phase), 76 uH (phase-phase), 0.66 gcm2

Configuration:

DRV10987 0x90 0x3D

DRV10987 0x91 0x2A49

DRV10987 0x92 0x40

DRV10987 0x93 0x41F0

DRV10987 0x94 0x3BAF

DRV10987 0x95 0x78C3

DRV10987 0x96 0x6A

BR, Alois