Low-thrust fluctuation matrix combined iron core primary permanent magnet linear synchronous motor

Abstract

The invention provides a low-thrust fluctuation matrix combined iron core primary permanent magnet linear synchronous motor. The motor is composed of a plurality of independent type iron core primaries; the plurality of independent iron core primaries are arranged on secondaries at the bottom of the independent iron core primaries according to a form of transverse-and-longitudinal m*n matrix and are in rigid connection with the secondary through non-magnetic materials so as form an integrated body; each independent iron core is independently powered by a concentrated winding, and independence between each other can be ensured; and each independent type iron core primary is provided with a coil winding. According to a permanent magnet linear synchronous motor which adopts a concentrated winding and is provided with short iron core primaries, the invention provides the matrix combined iron core primary permanent magnet linear synchronous motor. According to the low-thrust fluctuation matrix combined iron core primary permanent magnet linear synchronous motor, the magnetic resistance fluctuation amplitude of the motor can be greatly reduced, and the average thrust of the motor can be increased manyfold, and the fluctuation amplitude of the motor can be reduced, and the performance of the motor can be improved.

Description

technical field [0001] The invention relates to the field of linear motors, in particular to a permanent magnet linear synchronous motor with low thrust fluctuation matrix type combined iron core primary. Background technique [0002] Permanent magnet linear synchronous motors have outstanding advantages such as short transmission chain brought by direct drive, simple structure, fast acceleration and deceleration response, high thrust density, and accurate positioning, but there are obvious shortcomings such as large thrust fluctuations, low-speed crawling during precision motion control, etc. This phenomenon seriously affects the motion control performance of the motor. The thrust fluctuation components mainly include end effect stress, cogging effect force and electromagnetic thrust pulsation, in which the end effect stress is caused by the long straight and disconnected edge end of the primary armature core, which is dragged by the electromagnetic attraction. The side-to...

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Problems solved by technology

[0003] For mining, metallurgy, petrochemical, precision machine tools, electromagnetic ejection, and other industries, various linear loads and mechanical equipment with large inertia are usually driven by high-voltage motors. This voltage level brings many challenges to the design, manufacture and maintenance of motors. problem, and the price of the inverter used in this motor is also quite expensive

The current of inverters on the market is generally only up to 450A, which limits the design specifications of high-voltage motors

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