Datasheet

TMC4671 Datasheet • IC Version V1.00 | Document Revision V1.03 • 2018-Sept-06

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Figure 21: Encoder Initialization by minimal Movement

The ﬂux ramping can be controlled by setting the U_D_INKR - which manipulates the slope of the ramp.

The maximum voltage can be set by the parameter U_D_MAX. During operation, the current is monitored

and the process is stopped when the current limit I_D_MAX is reached.

Figure 22: Flux Ramping

Info

For correct operation of this module a few parameters have to be set. Please try

TRINAMIC TMCL-IDE Support for ﬁrst usage and parameter tuning.

4.7.10.3 Encoder Initialization by Hall sensors

The TMC4671 can calculate PHI_E_OFFSET very precisely at a Hall state change for a second encoder

system, when Hall sensors are correctly aligned. Therefore, the function needs to be enabled and calculate

a new oﬀset at the next Hall state change. After disabling of the module, the process can be started again.

This function can also be used as a rough plausibility check during longer operation.

4.7.10.4 Encoder Initialization by N Pulse Detection

After determination of a correct oﬀset, the value can be used again after power cycle. The encoder’s N

pulse can be used as reference for this. For starters the user can drive the motor in open-loop mode or by

using digital Hall sensor signals. After passing the encoder’s N pulse, the ABN encoder is initialized and

can be used for operation.

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