US 12,381,427 B2
Double rotor brushless direct-current motor with fluid cooling
Reza Norollahisomarin, Ft. Lauderdale, FL (US)
Assigned to RH Motor Industry, LLC, Ft. Lauderdale, FL (US)
Filed by RH Motor Industry, LLC, Ft. Lauderdale, FL (US)
Filed on Apr. 25, 2023, as Appl. No. 18/306,506.
Application 18/306,506 is a continuation of application No. 17/966,868, filed on Oct. 16, 2022, granted, now 11,637,463.
Prior Publication US 2024/0128813 A1, Apr. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02K 1/20 (2006.01); H02K 9/19 (2006.01); H02K 16/02 (2006.01)
CPC H02K 1/20 (2013.01) [H02K 9/19 (2013.01); H02K 16/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A brushless direct-current (BLDC) motor comprising:
a double rotor comprising:
a double rotor housing,
an inner rotor secured to the rotor housing, the inner rotor comprising a first set of a plurality of N-pole and S-pole magnets disposed alternately in annular form,
an outer rotor secured to the rotor housing, the outer rotor comprising a second set of the plurality of N-pole and S-pole magnets disposed alternately in annular form, and
a rotational shaft rotatably mounted through an inner aperture of the double rotor housing;
a stator comprising:
a stator base portion,
a plurality of cooling structures distributed circumferentially around the stator base portion defining a plurality of slots therebetween, and
a plurality of stator teeth electrically connected to one another, each of the plurality of stator teeth being disposed in one of the plurality of slots and having a plurality of windings wound around the plurality of stator teeth; and
a fluid distribution system configured to transfer heat out of the motor, the fluid distribution system comprising:
a fluid introduction module positioned within a recess of the stator, the fluid introduction module comprising:
a fluid introduction base portion,
a plurality of support members disposed on a top surface of the fluid introduction base portion and configured to contact a bottom surface of the stator base portion thereby forming a cavity within the recess between the stator base portion and the fluid introduction base portion,
a plurality of fluid inlet apertures distributed proportionally in accordance with the plurality of cooling structures,
a plurality of fluid channels, each of the plurality of fluid channels being:
secured to the fluid introduction top surface on one end,
disposed over one of the plurality of fluid inlet apertures,
housed within one of the plurality of cooling structures, and
configured to channel fluid out of one of the plurality of cooling structures, and
a fluid injection portion secured to a bottom surface of the fluid introduction base portion, the fluid injection portion being configured to channel a flow of fluid into the cavity and the plurality of cooling structures; and
a fluid egress module comprising;
a fluid egress base portion secured to an outer edge of a bottom portion of the stator and an outer edge of a bottom portion of the stator thereby forming a fluid egress cavity configured to channel used fluid directed from the cooling structures out of the fluid distribution system via a fluid outlet disposed on a bottom surface of the fluid egress base portion.