Abstract
We designed the magnetic driving submersible pump (MDSP) to substitute ordinary one. Because of the eddy current and stray field, the power loss of the MDSP was increased 11-15% and these problems drop down the pump life same time because of the property of permanent magnets becoming worse by ultra warm. It can decrease the power loss 5-10% and magnetic materials volume 13% to use the optimizing magnetization permanent magnets to obtaining the maximal gradient force. There are 8 or more times longer life of the MDSP than the ordinary one.
