Flux switching type mixed excitation linear memory motor

Abstract

The invention discloses a flux switching type mixed excitation linear memory motor. The flux switching type mixed excitation linear memory motor comprises a secondary stator core; at least one primaryrotor is relatively arranged on the outer side of the secondary stator core; the primary rotor comprises a plurality of primary rotor modules; each primary rotor module comprises a rotor yoke which comprises two emergences; the emergences are provided with armature teeth; a humeral angle is arranged between the two emergences on the same rotor yoke; a neodymium iron boron permanent magnet is arranged between the two armature teeth in the same primary rotor module; empty holes corresponding to gas of the armature teeth are arranged on the emergences; aluminum nickel cobalt permanent magnets forming magnetic loops with the rotor yokes are arranged in the empty holes; pulse winding grooves are formed in the humeral angles; and pulse windings are arranged in the pulse winding grooves. According to the flux switching type mixed excitation linear memory motor, the operation principle of memory motors is introduced into linear motors, so that the flux weakening ability and high-speed operation interval of the linear motors are improved, indeed air-gap field adjustment is realized, the efficiency of the whole motor operation system is improved, the energy consumption is reduced and the energy source utilization rate is improved.

Description

technical field [0001] The invention relates to the technical field of motors, more specifically, to a magnetic flux switching hybrid excitation linear memory motor. Background technique [0002] In the field of linear motors, the permanent magnets and armature windings of the flux-switching permanent magnet linear motors are installed in the modular primary short mover, while the secondary long stator has a simple structure and is only composed of a magnetic core, which can be used as a bilateral symmetrical magnet. The road parallel structure not only has the dual advantages of high power density of permanent magnet motor and simple secondary structure of induction motor, but also allows high-efficiency fault-tolerant operation. If it is applied to long stators such as rail transit, it can greatly reduce system cost. [0003] However, due to the inherent characteristics of ordinary permanent magnet materials, the magnetic field generated by ordinary permanent magnets in li...

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Problems solved by technology

[0003] However, due to the inherent characteristics of ordinary permanent magnet materials, the magnetic field generated by ordinary permanent magnets in linear motors is basically constant, and the speed regulation range of linear motors is very limited when they are used as driving or executing components.

Although the application of mixed excitation realizes the adjustability of the air gap magnetic field, the two kinds of magnetic potential sources increase the complexity of the electromagnetic characteristics, and the mutual influence between the two magnetic fluxes affects the reliability of the system to a certain extent, and the motor runs for a long time. During the process, there is a risk of failure in the excitation current control system, and the counter electromotive force generated by frequent changes in the motor's operating state can easily cause damage to external power components. At the same time, there are weaknesses such as increased excitation loss and increased heat generated by the motor.

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