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TMCM-1181-CABLE Datasheet(PDF) 4 Page - TRINAMIC Motion Control GmbH & Co. KG. |
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TMCM-1181-CABLE Datasheet(HTML) 4 Page - TRINAMIC Motion Control GmbH & Co. KG. |
4 / 18 page TMCM-1181 V3.0 Hardware Manual (Rev. 0.90 / 2015-JUL-10) 4 www.trinamic.com TRINAMICS UNIQUE FEATURES – EASY TO USE WITH TMCL stallGuard2™ stallGuard2 is a high-precision sensorless load measurement using the back EMF on the coils. It can be used for stall detection as well as other uses at loads below those which stall the motor. The stallGuard2 measurement value changes linearly over a wide range of load, velocity, and current settings. At maximum motor load, the value goes to zero or near to zero. This is the most energy-efficient point of operation for the motor. Load [Nm] stallGuard2 Initial stallGuard2 (SG) value: 100% Max. load stallGuard2 (SG) value: 0 Maximum load reached. Motor close to stall. Motor stalls Figure 1.1 stallGuard2 load measurement SG as a function of load coolStep™ coolStep is a load-adaptive automatic current scaling based on the load measurement via stallGuard2 adapting the required current to the load. Energy consumption can be reduced by as much as 75%. coolStep allows substantial energy savings, especially for motors which see varying loads or operate at a high duty cycle. Because a stepper motor application needs to work with a torque reserve of 30% to 50%, even a constant-load application allows significant energy savings because coolStep automatically enables torque reserve when required. Reducing power consumption keeps the system cooler, increases motor life, and allows reducing cost. 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 0 50 100 150 200 250 300 350 Efficiency Velocity [RPM] Efficiency with coolStep Efficiency with 50% torque reserve Figure 1.2 Energy efficiency example with coolStep |
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