| 摘要 |
<p>The invention relates to the field of electrical engineering and specifically to motors having permanent magnets and used, for instance, in a submersible electric drive for extracting formation fluids. A rotor contains a shaft (1) with a keyway (4), and a magnetic core stack (2) made of electrotechnical-steel plates and having poles of alternating polarity, each of which is formed by two prism-shaped tangentially magnetized permanent magnets (3) arranged in a V-shape and facing, with the same polarity, towards a pole. The magnets (3) are provided within keyways in the plate stack and do not come into contact with one another, and the number of magnets (3) is twice the number of poles. The inner and outer surfaces of the plates of the plate stack have no discontinuities. Keyways (4) are provided on the inner surface of the plates, at least along an axis of one polarity. The present invention allows for increasing the electromechanical and energy characteristics of a motor by means of decreasing magnetic flux leakage while maintaining the mechanical strength of a rotor.</p> |
