Electric motor, has rotor arranged within stator, where gap is formed between magnets and corresponding arcuate connection parts and air gaps are formed between inner surfaces of magnets and outer surface of rotor

摘要

The motor has a rotor (20) arranged within a stator and having an outer surface confronting the stator, where the stator comprises a shell. The shell comprises arcuate connection parts (11a-11d) connecting respective sidewalls (10a-10d). The stator comprises magnets (12a-12d) arranged inside the connection parts, where outer surface of each magnet is adjacent to inner surfaces of two neighboring sidewalls. A gap is formed between each magnet and the corresponding connection parts, and air gaps are formed between inner surfaces of the magnets and the outer surface of the rotor.