The combined elastic support is one type of elastic squirrel cage support plus elastic ring filled with oil.

A practical die structure and the process for die casting squirrel cage rotor are presented.

In this paper, the authors analyze the unique advantage for the wound rotor motor adopted with the brushless self-starting, based on the comparison of the flameproof wound rotor motor and squirrel-cage motor in performance, structure and limitations, and listed their advantages and disadvantages.