Non-groove stator of evaporative cooling motor

Abstract

The invention discloses a stator structure without slot, a rotor coil 20 is arranged in the rotor core slot 10, a stator core 40 is not provided with a stator slot, is sleeved on the non ferromagnetic material barrel 50 and is fixed by a plurality of bolts 80 arranged along circumference, the non ferromagnetic material barrel 50 is provided with a plurality of non ferromagnetic material slots 90 along circumference direction. Meanwhile, a stator slot wedge 70 is arranged in the non ferromagnetic material slot 90 opening to fix the stator coil 60, air gap is provided between the stator core 40 and the stator core 10. The slot opening of the non ferromagnetic material slot 90 provided on the non ferromagnetic material barrel 50 faces to the stator direction or the rotor direction.

Description

technical field [0001] The invention relates to a motor stator, in particular to a slotless stator of an evaporative cooling motor. Background technique [0002] Motors with high power density, light weight, and small size are one of the goals pursued by the motor industry. Especially in ships and aircrafts that have special requirements for weight and space, high power density of motors is even more important. Due to its good cooling effect, the design of evaporative cooling motor allows higher line load than conventional technology to achieve higher power density, so as to meet the special requirements for motor weight and volume. However, the further improvement of the power density of the evaporative cooling motor is limited by the stator slot structure. This is because: the cogging occupies a large stator space, which increases the size and weight of the stator yoke, making it difficult to make the motor smaller; in the design of the motor, the magnetic density of the ...

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Problems solved by technology

[0005] The slotless stator structure has not been applied in other motor fields. This is mainly because the most critical issue of whether the slotless stator structure can be applied to the motor to achieve higher power density is that after the air gap is increased, the excitation magnetic potential of the rotor will also increase accordingly. Therefore, the cooling effect of the rotor is put forward higher requirements, and the general air cooling and other rotor cooling methods cannot meet the corresponding requirements, and the motor with the evaporative cooling method of the rotor is just right Larger excitation potential due to its good cooling effect

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