Stator with carbon fiber-based insulation strips

A stator comprising:

• a stator core including
• an annular portion,
• a first tooth extending radially inward from the annular portion, the first tooth including a first side surface,
• a second tooth extending radially inward from the annular portion, the second tooth including a second side surface, wherein a slot is defined between the first and second teeth, and
• an inner surface arranged on the annular portion between the first and second side surfaces;
• a thermally conductive, carbon fiber-based insulation strip within the slot for covering the inner surface, the first side surface, and the second side surface;
• a first winding wound around the first tooth;
• and
• a second winding wound around the second tooth.

A stator comprising:

• a stator core including
• an annular portion,
• a first tooth extending radially inward from the annular portion, the first tooth including a first side surface, a first end surface, and a second end surface opposite the first end surface,
• a second tooth extending radially inward from the annular portion, the second tooth including a second side surface facing the first side surface of the first tooth, a third side surface facing an opposite direction as the second side surface, a first end surface, and a second end surface opposite the first end surface,
• a third tooth extending radially inward from the annular portion, the third tooth including a fourth side surface facing the third side surface of the second tooth, a first end surface, and a second end surface opposite the first end surface,
• a first inner surface arranged on the annular portion between the first and second side surfaces,
• a second inner surface arranged on the annular portion between the third and fourth side surfaces;
• a first thermally conductive, carbon fiber-based insulation strip covering the first side surface, the first inner surface, and the second side surface;
• a second thermally conductive, carbon fiber-based insulation strip covering the third side surface, the second inner surface, and the fourth side surface;
• a first insulation end cap configured to cover the first end surface of each of the first, second, and third teeth;
• a second insulation end cap configured to cover the second end surface of each of the first, second, and third teeth;
• and
• a winding wound around the second tooth, the winding contacting the first insulation strip, the first insulation end cap, the second insulation strip, and the second insulation end cap, such that the winding does not contact the second side surface, the first end surface of the second tooth, the third side surface, or the second end surface of the second tooth.

A power tool comprising:

• a motor including a rotor and a stator, the stator including
• a stator core having
• an annular portion,
• a plurality of teeth extending radially inward from the annular portion, such that a slot is defined between each pair of adjacent teeth, wherein each of the teeth includes a pair of side surfaces that face in opposite directions, and
• a plurality of inner surfaces on the annular portion, each inner surface arranged between facing side surfaces of two adjacent teeth;
• a plurality of thermally conductive, carbon fiber-based insulation strips, each insulation strip arranged within one of the slots for covering the inner surface and the facing side surfaces of two adjacent teeth;
• and
• a plurality of windings wound around the respective teeth.