Low-speed high-thrust density double-layer fractional slot winding cylindrical linear motor

Abstract

The invention provides a low-speed high-thrust-density double-layer fractional slot winding cylindrical linear motor which belongs to the technical field of a linear motor. The low-speed high-thrust-density double-layer fractional slot winding cylindrical linear motor comprises a motor primary stage, a motor secondary stage, a primary iron core, an air gap, a primary wire duct, a primary half wireduct, primary teeth, primary edge teeth, a primary yoke, a cake-shaped winding, a permanent magnet, a magnet guiding ring, etc. A double-layer factional slot winding structure is utilized. A motor polar distance is reduced, and working frequency is effectively increased, thereby improving motor efficiency, and realizing a certain speed adjusting range of the motor. The width of an edge trough isset to one half of that of a normal primary trough, and the thickness of the primary edge trough is smaller than that of the primary tooth. Furthermore the effective length of the motor primary pole is equal with (n+1 / 2)*tau, and a remarkable inhibition effect is performed on motor thrust force fluctuation. A motor fixing force is reduced so that higher stability and higher reliability are realized in motor operation. The low-speed high-thrust-density double-layer fractional slot winding cylindrical linear motor has advantages of simple structure, relatively low cost, high efficiency, relatively large speed adjusting range, high thrust force density, high operation stability, high operation reliability, etc. The low-speed high-thrust-density double-layer fractional slot winding cylindricallinear motor is suitable for a low-speed large-thrust-force occasion.

Description

technical field [0001] The invention relates to a cylindrical linear motor, in particular to a low-speed, high-thrust density double-layer fractional slot winding cylindrical linear motor. It belongs to the technical field of linear motors. Background technique [0002] Linear motor is a kind of motor that directly converts electrical energy into linear motion mechanical energy without passing through any intermediate conversion device. Compared with the rotary motor transmission mode, it can save the intermediate conversion mechanism, reduce the space occupied by equipment, and improve system efficiency. As a structural form of linear motors, cylindrical linear motors have more advantages: high operating efficiency, high power and force density, good servo performance, and closed structure. However, for low-speed and high-thrust density applications, cylindrical linear motors require lower synchronous speeds, and single-winding permanent magnet motors generally have larger...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a low-speed, high-thrust density, double-layer fractional slot winding cylindrical linear motor, which solves the problem of low-speed, high-thrust density of the existing cylindrical permanent magnet linear motor Under the circumstances, the problems of low efficiency, small speed regulation range, and low thrust density

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