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US 9,793,781 B2Granted
Internal closed loop cooling
AssigneeCanrig Drilling Technology Ltd.
InventorsCharles Patrick, Kevin Williams
Life of this patent
Estimating the term…
Abstract
An electric motor having internal closed loop cooling includes a cooling chamber coupled to the stator cover of the electric motor. A fan is positioned to circulate air through the interior of the electric motor and the cooling chamber. A heat sink in the cooling chamber removes heat from the circulating air. The heat sink may be coupled to a fluid cooling jacket to transfer heat thereto or therefrom.
Claims18
An electric motor having internal closed loop cooling, the electric motor comprising:
- a rotor;
- a stator;
- a stator cover, the stator cover positioned generally around the stator and at least partially extending beyond the length of the stator;
- and
- a motor housing, a space between the motor housing and the stator cover defining an internal cooling chamber;
- the stator cover including a motor air supply passage and a motor air return passage, the motor air supply passage and motor air return passage formed as apertures between the interior of the stator cover and the internal cooling chamber;
- and
- a chamber separator plate, the chamber separator plate positioned to separate the portion of the internal cooling chamber having the motor air supply passage from the portion of the internal cooling chamber having the motor air return passage, the chamber separator plate including an aperture having a cooling fan installed therein, the cooling fan positioned to circulate air through the interior of the electric motor, the air entering the interior of the electric motor via the motor air supply passage and exiting via the motor air return passages.
5 more elements
An electric motor having internal closed loop cooling, the electric motor comprising:
- a rotor, the rotor including a rotor body having a plurality of permanent magnets coupled thereto;
- a stator, the stator including a plurality of windings;
- a stator cover, the stator cover positioned generally around the stator and at least partially extending beyond the length of the stator;
- a fluid cooling jacket, the fluid cooling jacket positioned generally about the stator cover;
- a motor housing, the space between the motor housing and the stator cover defining an internal cooling chamber;
- a heat sink, the heat sink positioned within the internal cooling chamber, the heat sink coupled directly to the fluid cooling jacket;
- a motor air supply passage and a motor air return passage, the motor air supply passage and motor air return passage formed as apertures between the interior of the stator cover and the internal cooling chamber;
- a chamber separator plate, the chamber separator plate positioned to separate the portion of the internal cooling chamber having the motor air supply passage from the portion of the internal cooling chamber having the motor air return passage, the chamber separator plate including an aperture;
- and
- a cooling fan coupled to the aperture in the chamber separator plate, the cooling fan positioned to circulate air through the interior of the electric motor, the air entering the interior of the electric motor via the motor air supply passage and exiting via the motor air return passages.
7 more elements
Dependencies are inferred from the claim text.