Motor, electric equipment, and method of manufacturing motor for reducing electric corosion of bearings
First Claim
1. A motor comprising:
- a stator in which a winding is applied through an insulating part to a stator core formed by laminating a predetermined number of electromagnetic steel plates which have been punched into a predetermined shape;
a rotor assembly in which a rotor and a bearing formed by a rolling bearing is fitted to a shaft;
a printed wiring board which is arranged at an end part of the stator in an axial direction and to which a drive circuit is mounted;
a bracket imposed to at least the end part of the stator in the axial direction to which the printed wiring board is arranged; and
a conductive sheet provided between the printed wiring board and the bracket, wherein the conductive sheet and the printed wiring board are planar structures, and wherein the conductive sheet is parallel to and overlies the printed wiring board.
1 Assignment
0 Petitions
Accused Products
Abstract
In a motor driven by a drive circuit such as an inverter, there is a problem that electric current flowing through a bearing causes electric corrosion, which impairs the durability of the bearing. A motor of the invention includes: a stator in which a winding is applied through an insulating part to a stator core formed by laminating a predetermined number of electromagnetic steel plates which have been punched into a predetermined shape; a rotor assembly in which a rotor and bearings and formed by rolling bearings are fitted to a shaft; a printed wiring board which is arranged at an end part of the stator in an axial direction and to which a drive circuit is mounted; a bracket imposed to at least the end part of the stator in the axial direction to which the printed wiring board is arranged; and a conductive sheet provided between the printed wiring board and the bracket.
-
Citations
11 Claims
-
1. A motor comprising:
-
a stator in which a winding is applied through an insulating part to a stator core formed by laminating a predetermined number of electromagnetic steel plates which have been punched into a predetermined shape; a rotor assembly in which a rotor and a bearing formed by a rolling bearing is fitted to a shaft; a printed wiring board which is arranged at an end part of the stator in an axial direction and to which a drive circuit is mounted; a bracket imposed to at least the end part of the stator in the axial direction to which the printed wiring board is arranged; and a conductive sheet provided between the printed wiring board and the bracket, wherein the conductive sheet and the printed wiring board are planar structures, and wherein the conductive sheet is parallel to and overlies the printed wiring board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification