Magnetic circuit series double stator cylindrical linear motor

Abstract

The invention discloses a magnetic circuit series double-stator cylindrical linear motor. The magnetic circuit series double-stator cylindrical linear motor comprises an inner stator ring and an outer stator ring which are of a salient pole structure, a rotor ring is arranged between the inner stator ring and the outer stator ring, and the inner stator ring and the outer stator ring are respectively composed of a primary iron core, armature windings and permanent magnets. Each primary iron core is composed of a plurality of E-shaped iron core bodies which are same in structure and arranged in the axial direction, one permanent magnet is fixedly embedded between every two E-shaped iron core bodies, and teeth in the middle of every E-shaped iron core body are fault-tolerant teeth. All the permanent magnets are excited in the axial direction, every two adjacent permanent magnets are opposite in excitation direction, and the polarity, from left to right in the axial direction, of each permanent magnet on the inner stator ring is opposite to the polarity, from left to right in the axial direction, of each permanent magnet on the outer stator ring. One round-cake-shaped armature winding is embedded in every groove in every E-shaped iron core body, and the armature windings are connected in series to form an A phase and a B phase. The magnetic circuit series double-stator cylindrical linear motor is high in space utilization rate, high in permanent magnet motor force and energy index, small in size and light in weight.

Description

technical field [0001] The invention relates to the field of motors, in particular to a double-stator cylindrical linear motor structure. Background technique [0002] Double-stator cylindrical linear motors generate greater thrust than ordinary cylindrical linear motors. At present, there are mainly two types of double-stator cylindrical linear motors: one is a double-stator cylindrical linear induction motor, the primary inner and outer stators are respectively located on the inner and outer sides of the mover, and both the stator and the mover are composed of iron cores. There are windings on each stator, and the power density of the induction motor is lower than that of the permanent magnet motor. The other is a double-stator cylindrical linear oscillating motor with transverse magnetic flux. Its two stator core rings are placed side by side on the outside of the mover core, and its double-stator structure adopts a parallel structure. [0003] The Chinese patent applic...

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Problems solved by technology

[0003] The Chinese patent application number is 201210181050.5, and the name is "positioning force complementary double-stator cylindrical linear motor". The concentric double-stator structure is applied to the cylindrical permanent-magnet linear motor, and the two stator rings are respectively placed in the dynamic On the inside and outside of the sub-ring, the magnetic circuit generated by the permanent magnets on the inner stator ring passes through the inner air gap of the mover ring, the teeth on the inner side of the mover ring, and the yoke of the mover, and then passes through the teeth on the inner side of the mover and passes through the inside of the mover ring The air gap returns to the inner stator to form the internal magnetic circuit of the mover; the magnetic circuit generated by the permanent magnet on the outer stator ring passes through the outer air gap of the mover ring, the outer teeth of the mover ring, and the yoke of the mover, and then flows from the outside of the mover The side teeth pass through the outer air gap of the mover ring and return to the outer stator ring to form the outer magnetic circuit of the mover; the inner and outer magnetic circuits of the mover ring are connected in parallel. This double-stator motor structure places one of the stators For the hollow part of the mover ring, the volume of the hollow part of the mover is fully utilized, which is conducive to improving the thrust density. However, because the internal magnetic circuit of the mover ring and the external magnetic circuit are in parallel and independent of each other, they both pass through the mover ring yoke The magnetic circuit is formed at the part, which makes the yoke part of the mover indispensable, and there must be enough volume space to provide the magnetic flux path for the two magnetic circuits. Therefore, this double-stator structure with parallel magnetic circuits makes the radial space of the motor more efficient. The rate is not high, the radial space is large

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