TMC5031 DATASHEET (Rev. 1.07 / 2013-APR-30)
6
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, making the drive an efficient and precise solution.
Energy efficiency
Motor generates less heat
Less or no cooling
Use of smaller motor
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-
-
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power consumption decreased up to 75%.
improved mechanical precision.
improved reliability and lower cost infrastructure.
less torque reserve required, lower cost motor.
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
0,7
0,6
0,5
0,4
0,3
0,2
0,1
0
Efficiency with 50% torque reserve
Efficiency
0
50
100
150
200
250
300
350
Velocity [RPM]
Figure 1.2 Energy efficiency with coolStep (example)
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