TMC5041 Datasheet, PDF (7/85 Pages) TRINAMIC Motion Control GmbH & Co. KG. – POWER DRIVER FOR STEPPER MOTORS

TMC5041 DATASHEET (Rev. 1.12 / 2016-APR-22)
7
1.7 coolStep – Load Adaptive Current Control
coolStep drives the motor at the optimum current. It uses the stallGuard2 load measurement
information to adjust the motor current to the minimum amount required in the actual load situation.
This saves energy and keeps the components cool.
Benefits are:
- Energy efficiency
- Motor generates less heat
- Less or no cooling
- Use of smaller motor
power consumption decreased up to 75%
improved mechanical precision
improved reliability
less torque reserve required → cheaper motor does the job
Figure 1.2 shows the efficiency gain of a 42mm stepper motor when using coolStep compared to
standard operation with 50% of torque reserve. coolStep is enabled above 60RPM in the example.
0,9
Efficiency with coolStep
0,8
Efficiency with 50% torque reserve
0,7
0,6
0,5
Efficiency
0,4
0,3
0,2
0,1
0
0
50 100 150 200 250 300 350
Velocity [RPM]
Figure 1.2 Energy efficiency with coolStep (example)
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