GE DS3800XCIA CPU module
Despite all these advantages, not all applications can be covered with the LSH-motor. Due to the high number of pole pairs of the LSH-motor, it has a high rated frequency. This is why the core losses increase disproportionately with the speed. This is clearly apparent by the extremely descending torque characteristic of the LSH. The comparison reveals that the application is decisive for choosing the appropriate motor type!
If high dynamics is an issue
the LSH-motor has its advantages. In standard applications the LSH-motor also convinces with its high power density. Furthermore, the LSH-motor is the winner in the price comparison and with its compact overall length.Due to the 6-pole design the LST-motor is generally recommended for applications with rated speeds higher than 3000 rpm. Furthermore, the LST-motor is the right choice for extreme overloads under static conditions (e.g.: press applications). In case of a desired adaptation of moment of inertia the LST-motor is able to achieve better regulating properties than the more dynamic LSH-motor.
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