Method of encapsulating induction motor stator
An induction motor stator encapsulate method, including arranging a stator of an induction motor in a case of the induction motor, wherein the stator comprises a stator core and a stator winding surrounding the stator core; filling a first encapsulating material into the case for forming a first insulation layer, wherein the first insulation layer directly covers the stator winding; and filling a second encapsulating material into the case for forming a second insulation layer, wherein the second insulation layer covers the first insulation layer; wherein a shrink rate of the first encapsulating material is smaller than a shrink rate of the second encapsulating material.
1. An induction motor stator encapsulate method, comprising:
arranging a stator of an induction motor in a case of the induction motor, wherein the stator comprises a stator core and a stator winding surrounding the stator core;
filling a first encapsulating material into the case for forming a first insulation layer, wherein the first insulation layer directly covers the stator winding; and
filling a second encapsulating material into the case for forming a second insulation layer, wherein the second insulation layer covers the first insulation layer;
wherein a shrink rate of the first encapsulating material is smaller than a shrink rate of the second encapsulating material.
2. The induction motor stator encapsulate method of claim 1 , wherein the first encapsulating material is silicon.
3. The induction motor stator encapsulate method of claim 2 , wherein the second encapsulating material is epoxy resin.
4. The induction motor stator encapsulate method of claim 3 , wherein a volume of the first encapsulating material filled in the case is greater than a volume of the second encapsulating material filled in the case.
5. The induction motor stator encapsulate method of claim 1 , further comprising:
arranging the stator and the case in a sealed container; and
vacuum pumping the sealed container.
6. An induction motor stator encapsulation structure, comprising:
a case;
a stator, arranged in the case, the stator comprising:
a stator core; and
a stator winding surrounding the stator core;
a first insulation layer, formed by a first encapsulating material and directly covering the stator winding; and
a second insulation layer, formed by a second encapsulating material and covering the first insulation layer;
wherein a shrink rate of the first encapsulating material is smaller than a shrink rate of the second encapsulating material.
7. The induction motor stator encapsulation structure of claim 6 , wherein the first encapsulating material is silicon.
8. The induction motor stator encapsulation structure of claim 7 , wherein the second encapsulating material is epoxy resin.
9. The induction motor stator encapsulation structure of claim 6 , wherein a thickness of the second insulation layer is greater than 2 millimeters.