A two-pole TEFC electric motor and an electric motor drive arrangement
A technology of electric motors and motors, applied in the field of electric motor drive devices, TEFC-type electric motors, can solve the problems of reducing the motor shell, weakening the cooling properties of the motor, etc., and achieve the effect of improving vibration characteristics
Pending Publication Date: 2020-01-07
ABB (SCHWEIZ) AG
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Problems solved by technology
Additionally, the outer surface area of the motor housing that helps transfer heat to the surrounding environment is reduced, thereby significantly impairing the cooling properties of the motor
Since TEFC-motors rely solely on heat transfer through the motor housing for cooling, these solutions are not ideal
Method used
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Embodiment Construction
[0015] According to a first aspect of the present disclosure, there is provided a bipolar TEFC (Totally Enclosed Fan Cooled) electric motor. Preferably, but not necessarily, the motor is an induction motor.
[0016] The motor includes: a housing 1 having an inner space 1a; a stator assembly annularly arranged in the inner space of the housing; a motor shaft rotatably supported so as to concentrically extend through the stator assembly; and a rotor assembly, It is fixed to and surrounds the motor shaft within the interior space, and the rotor assembly is disposed concentrically with and inside the stator assembly. Preferably, but not necessarily, the housing 1 is at least partly a cast housing.
[0017] The motor further comprises mounting foot structures 2 protruding radially from the outer surface of the housing 1 for mounting said motor to a planar base structure. The mounting foot structure 2 comprises four mounting points 2a, 2b, 2c, 2d defining corner points of a rectan...
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A two-pole TEFC (totally enclosed, fan- cooled) electric motor is concerned. A housing (1) of the motor as an inner space (1a), into which a stator assembly, a motor shaft and a rotor assembly fixed to and surrounding the motor shaft is fitted. A mounting foot structure (2) radially protrudes from the outer surface of the housing (1) for mounting said induction motor to a planar base structure. The mounting foot structure (2) comprises four mounting points (2a, 2b, 2c, 2d) defining corner points of a rectangular mounting footprint of the motor, such that the rectangular mounting foot print hastwo opposite sides parallel with the motor shaft. Furthermore, the mounting foot structure (2) comprising at least an additional mounting point (2e, 2f) positioned on each side of the mounting footprint parallel with the motor shaft, between the corner points of the mounting footprint.
Description
technical field [0001] The present disclosure relates to electric bipolar electric motors. More particularly, the present disclosure relates to TEFC (Totally Enclosed Fan Cooled)-type electric motors. In addition, it relates to an electric motor drive device. Background technique [0002] TEFC-type electric motors are well known and commonly used in a wide variety of end-use applications. In particular, such motors are closed such that ambient air is not allowed to circulate within the motor housing, resulting in a robust structure. In order to provide sufficient cooling for such motors, an external fan, usually provided on the motor shaft, is arranged to blow cooling air along the outer circumference of the motor housing, which is typically provided with cooling ribs. Due to the excess heat transferred through the motor housing, it is generally considered desirable to reserve as much motor housing surface area as possible for heat transfer. Furthermore, it is also gener...
Claims
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IPC IPC(8): H02K5/00H02K5/24
CPCH02K5/00H02K5/24H02K2213/03H02K5/06H02K5/18H02K9/08H02K11/33H02K9/06H02K17/04
Inventor S.马缇拉S.阿尼沃J.科森嫩
Owner ABB (SCHWEIZ) AG