A brushless doubly-fed induction motor with transverse flux phase segment

Abstract

The invention discloses a transversal flux phase section type brushless doubly-fed induction motor which is designed to improve the power and the torque density of the induction motor, can perform direct driving, and realizes brushless doubly-fed speed regulation or frequency modulation control. The motor comprises a power and control phase stator ring body and a phase rotor ring body. The power or control phase stator ring body or the phase rotor ring body adopts a series of phase stator magnetic poles or phase rotor magnetic poles which are distributed in a circular array way in two parts of ring body boxes made of non-magnetic steel or material with similar properties; the U-shaped notch of the magnetic pole is towards the arc surface of an air gap; a phase stator winding or a phase rotor winding penetrates through the U-shaped notch; the end surface of the magnetic pole of the phase stator ring body is exposed out of the inner ring of the ring body box; the end surface of the magnetic pole of the phase rotor ring body is exposed of the outer ring of the ring body box; the power and control phase stator ring body and the phase rotor ring body are coaxially sleeved to each other through the air gap and are sectionally assembled through phase along an axis; and phase windings the power and control phase rotor ring body are connected in series, so as to form a closed loop. The motor has universality, and is particularly applicable to large and middle-scale motor fields of wind driven generators and the like.

Description

technical field [0001] The invention relates to an AC brushless double-fed motor, in particular to a brushless double-fed induction motor with a transverse magnetic flux phase segment structure. Background technique [0002] With the development of high-power electric transmission technology in the fields of wind power, hydropower, fans and pumps, mining machinery, ship power, etc., people have low speed, high power, high torque density, direct drive, brushless double-fed speed regulation or The requirements for frequency-regulated motors are becoming more and more urgent. Most of these motors belong to induction motors, among which wind power generators are a hot spot for development and are representative products of this type of equipment. [0003] Taking the wind turbine as an example, in the double-fed induction generator DFIG (double-fed induction generator) system, the slow-rotating wind turbine is connected with the fast-rotating generator rotor through the gear box...

AI Technical Summary

Problems solved by technology

[0020] Second, the flow direction of the magnetic flux changes from radial to lateral, and the plane where the magnetic force lines are located is turned by 90°, which makes it difficult to directly use the silicon steel sheets that have been widely used in radial flux motors in transverse flux motors

[0021]Third, in radial flux induction motors, including BDFM, there are winding ends outside the core slots at the front and rear ends of the stator or rotor, which will Generate magnetic flux leakage and electromagnetic interference; in the existing transverse flux motor, since the cores of the stator or rotor are discrete, there are also winding conductors exposed outside the core winding slots at the discrete core intervals, which will also generate leakage Magnetic and Electromagnetic Interference

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