Magnetism increasing type internal tangential adjustable flux motor

Abstract

The invention discloses a magnetism increasing type internal tangential adjustable flux motor, belongs to the field of permanent magnet motors and solves a problem that uncontrollable demagnetization of an aluminum nickel cobalt permanent magnet is easy to occur when a flux weakening type adjustable flux motor runs at high load. The magnetism increasing type internal tangential adjustable flux motor comprises a stator core, an armature winding, a rotor core, a rotating shaft, tangential permanent magnet slots, p neodymium iron boron magnetic poles, p aluminum nickel cobalt magnetic poles and p quadrature axis magnetism barriers, wherein p is an even number; the p tangential permanent magnet slots and the p quadrature axis magnetism barriers are uniformly arranged on the rotor core along the circumferential direction of the motor, and each quadrature axis magnetism barrier is of a mirror symmetry structure centering on one tangential permanent magnet slot; the tangential permanent magnet slots and the quadrature axis magnetism barriers axially penetrate through the whole rotor core; one neodymium iron boron magnetic pole and one aluminum nickel cobalt magnetic pole are both arranged in each tangential permanent magnet slot; each neodymium iron boron magnetic pole is arranged in a position close to the inner circle of a rotor in the tangential permanent magnet slot; and each aluminum nickel cobalt magnetic pole is arranged in a position close to the outer circle of a rotor in the tangential permanent magnet slot.

Description

technical field [0001] The invention belongs to the field of permanent magnet motors. Background technique [0002] In order to overcome the problems that the direct axis component of the armature current increases, the quadrature axis component decreases, the copper loss increases, and the electromagnetic torque of the motor decreases rapidly when the traditional rare earth permanent magnet motor is running at a weak field speed. The adjustable magnetic flux memory motor with coercive force AlNiCo permanent magnet came into being. When the motor is running, the air gap flux density of the permanent magnet motor is adjusted by applying the direct axis charge and demagnetization pulse current, thereby expanding the speed regulation range of the motor. . However, the quadrature-axis reactance Lq of this type of motor is often greater than the direct-axis reactance Ld during design. When the motor is running at high load, it needs a negative direct-axis current component to ge...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of uncontrollable demagnetization of AlNiCo permanent magnets prone to occur in high-load operation of a field-weakening adjustable flux motor, and at the same time reduce the difficulty of accurately adjusting the magnetization of AlNiCo permanent magnets online, and provide a This type uses AlNiCo permanent magnets and NdFeB permanent magnets at the same time, built-in tangential magnetic poles, and the quadrature axis reactance Lq is smaller than the direct axis reactance Ld, that is, the magnetization adjustable flux motor

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