Choose what kind of groove, depends on the specific situation...

    Efficient, the stator slot dumpy, in order to reduce leakage, improve operational efficiency, rotor slot is as large as possible, but since the start of the restrictions, but also have to choose the knife shaped, convex shaped groove, to start the current limit of rapidly rising...

    Frequency conversion, with large slot, supports the maximum torque, does not take into account the starting performance, rotor slot selection smooth straight side area...

    Material saving, low cost, small trough as the principle, performance can speak in the past, but also can greatly reduce the material consumption, asaccepted by the general customers...