Motor for washing machine and washing machine having the same

A motor for a washing machine, comprising:

• a stator including a coil portion;
• and
• a rotor, including:
• a rotor casing including a base portion shaped in a circular plate,
• a vertical wall extending substantially perpendicularly from an outer periphery of the base portion,
• a permanent magnet provided on an inner surface of the vertical wall, and
• a connecting member provided at a center of the base portion of the rotor casing and connectable with a shaft,
• the base portion of the rotor casing includes:
• a first ring portion extending from the vertical wall to a second ring portion, the first ring portion being aligned with the coil portion on an axial direction of the rotor, wherein an inner surface of the first ring portion facing the coil portion is formed in a flat surface, and
• the second ring portion, provided with a plurality of air inlet channels configured to guide air outside the rotor casing to the coil portion, the second ring portion extending from the connecting member to the first ring portion and the second ring portion protruding past the first ring portion toward the stator, wherein the plurality of air inlet channels are configured to face the coil portion.

A motor for a washing machine, comprising:

• a stator including a coil portion;
• and
• a rotor, including:
• a rotor casing including a base portion having a disk shape and a vertical wall extending substantially perpendicularly from an outer periphery of the base portion,
• a permanent magnet provided on an inner surface of the vertical wall of the rotor casing, and
• a connecting member provided at a center of the base portion of the rotor casing and connectable with a shaft,
• the base portion of the rotor casing includes:
• a first ring portion extending from the vertical wall to a second ring portion, the first ring portion being aligned with the coil portion along an axial direction of the rotor, wherein an inner surface of the first ring portion facing the coil portion is formed in a flat surface, and,
• the second ring portion, extending from the connecting member to the first ring portion and the second ring portion protruding past the first ring portion toward the stator, and
• a connecting portion, connecting the first ring portion and the second ring portion, provided with a plurality of air inlet holes, wherein the plurality of air inlet holes of the connecting portion are configured to face the coil portion.

A washing machine, comprising:

• a water tub;
• a load rotatably disposed inside the water tub;
• a shaft connected to the load;
• and
• a motor configured to rotate the load through rotation of the shaft, the motor including a stator including a coil portion, and a rotor the rotor including:
• a rotor casing including a base portion shaped in a circular plate and a vertical wall extending substantially perpendicularly from an outer periphery of the base portion,
• a permanent magnet provided on an inner surface of the vertical wall of the rotor casing, and
• a connecting member provided at a center of the base portion of the rotor casing and connected to the shaft,
• the base portion of the rotor casing includes:
• a first ring portion extending from the vertical wall to a second ring portion, the first ring portion being aligned with the coil portion along an axial direction of the rotor, wherein an inner surface of the first ring portion facing the coil portion is formed in a flat surface, and
• the second ring portion, provided with a plurality of air inlet channels configured to guide air outside the rotor casing to the coil portion, the second ring portion extending between the connecting member and the first ring portion and the second ring portion protruding past the first ring portion toward the stator.

A motor for a washing machine, comprising:

• a stator including a plurality of coils wound around a plurality of cores;
• and
• a rotor, including:
• a rotor casing, in which the stator is accommodated, including a base portion having a disk shape and a vertical wall extending substantially perpendicularly from an outer periphery of the base portion,
• a permanent magnet provided on an inner surface of the vertical wall of the rotor casing, and
• a connecting member provided at a center of the base portion of the rotor casing and connectable with a shaft,
• the base portion of the rotor casing includes:
• a first ring portion extending from the vertical wall to a second ring portion, the first ring portion being aligned with the plurality of coils and the plurality of cores on an axial direction of the rotor, wherein an inner surface of the first ring portion facing the coil portion is formed in a flat surface, and
• the second ring portion provided with a plurality of air inlet holes, the second ring portion having a flat upper surface that is closer to an upper end of the rotor casing than the inner surface of the first ring portion, the second ring portion extending from the first ring portion to the connecting member and spaced apart from the plurality of coils and the plurality of cores in a radial direction of the rotor so as not to face, in the axial direction of the rotor, the plurality of coils and the plurality of cores, wherein the plurality of air inlet holes of the second ring portion are configured to face the plurality of coils.