Stator for electric motors and permanent magnet rotating machines

Abstract

Provided are a stator capable of ensuring the creepage distance and being applicable to a compact motor, and a permanent magnet rotating electric machine. A motor stator (1) is provided with a yoke core (11) and a plurality of tooth cores (12) extending in the radial direction of the core (11). In the motor stator (1), a plurality of bobbins (13) attached to the tooth cores (12) and produced from an insulating material are provided, the bobbin (13) is configured from a body part (131) around which the exciting winding of the stator (1) is wound, and flange parts (132, 133) formed at both ends of the body part (131), and at an end surface in the circumferential direction of the inner diameter-side flange part (132, 133) of the flange parts (132, 133), a fitting section for fitting projecting and recessed sections of the flange parts (132, 133) of adjacent bobbins (13) to each other to thereby connect the plurality of bobbins (13) in the circumferential direction is provided.

Description

technical field [0001] The present invention relates to a stator of an electric motor and a permanent magnet rotating electrical machine equipped with the stator. Background technique [0002] As a motor, such as a motor installed in a machine or electronic equipment like a servo motor, there is an endless demand for its miniaturization. [0003] As a method of reducing the size of the motor, it is generally effective to increase the number of coils wound and increase the density of the coil wires (winding wires). [0004] As one of the means to implement this method, such a stator structure can be used. That is, a stator core constituting a stator (stator) is divided into a plurality of split cores. Next, a coil (winding) is wound a predetermined number of times for each of the split cores. Then, according to the number of slots required, the divided iron cores wound with coils are assembled into a ring-shaped stator. [0005] However, in such a stator structure, the su...

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Problems solved by technology

[0008] Thus, in motors, this creepage surface can cause problems with reduced insulation distances (insulation space distance, creepage distance, etc.)

Especially in the case of miniaturization of the motor, there is a high demand for high density inside the motor, and the insulation distance between the two conductive parts is also reduced. From the perspective of safety and operating performance, the necessary insulation performance Difficult to be guaranteed, this becomes a bigger problem

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