A brushless motor

• Main Authors: Guiqin Liu, Colin Paul Chapman, Ross Dagnal Goodwin, Hengky Wirawan, Shermaine Yvonne Tan, Japhet Lee Cordova Morabe
• Format: Patent
• Language: English
• Published: 15.03.2023
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

A brushless motor 1 has a stator assembly (Fig.2, 10) and a frame 14 within which the stator assembly is housed. The frame is overmoulded to the stator assembly and the frame comprises turbulators 112. The stator assembly may have stator core sub-assemblies (Fig.5, 16) each with a bobbin (Fig.5, 22) attached to the stator core and a winding (Fig.5, 24) wound about the bobbin. Each stator core may comprise a back (Fig.6, 26), and first and second arms (Fig.6, 28, 30) extending from the back. The turbulators may overlie the backs of the stator cores and may be formed in pairs in a V-shaped formation. The frame may comprise a main body 94 having protrusions 110, each protrusion overlying a respective stator core. The frame may comprise struts 98, each strut extending from a respective region of the frame overlying a core back to a shroud 96 of the frame. The motor may comprise a rotor assembly (Fig.7, 12). The frame may comprise apertures 114 and grooves 115 for introducing airflow to the rotor in use. The brushless motor may be used in a vacuum cleaner.