Invention Grant
- Patent Title: Cooling arrangement for an electric motor
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Application No.: US13835071Application Date: 2013-03-15
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Publication No.: US09653967B2Publication Date: 2017-05-16
- Inventor: Rafael Maynez
- Applicant: Techtronic Power Tools Technology Limited
- Applicant Address: VG Tortola
- Assignee: TECHTRONIC POWER TOOLS TECHNOLOGY LIMITED
- Current Assignee: TECHTRONIC POWER TOOLS TECHNOLOGY LIMITED
- Current Assignee Address: VG Tortola
- Agency: Michael Best & Friedrich LLP
- Main IPC: H02K1/32
- IPC: H02K1/32 ; H02K9/06 ; H02K1/26 ; H02K1/28 ; H02K13/04

Abstract:
An electric motor includes a stator operable to produce a magnetic field and defining an opening, and a rotor at least partially disposed within the opening. The rotor includes a shaft extending along a rotational axis, a first rotor magnetic core portion including a plurality of laminations stacked contiguously on the shaft, and a second rotor magnetic core portion coupled to the plurality of laminations. The first rotor magnetic core portion and the second rotor magnetic core portion cooperate to define the rotor magnetic core. A plurality of windings is coupled to the rotor magnetic core and an air flow path is formed as part of the second rotor magnetic core portion. The air flow path includes an axial portion that passes through the shaft axially along the rotational axis and a radial portion that extends radially outward through the second rotor magnetic core portion.
Public/Granted literature
- US20140265665A1 COOLING ARRANGEMENT FOR AN ELECTRIC MOTOR Public/Granted day:2014-09-18
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