High-power-density transverse magnetic field electromagnetic linear actuator

Abstract

The invention relates to a high-power-density transverse magnetic field electromagnetic linear actuator which comprises a shell, an end supporting cover, a linear bearing, an output shaft, a resonance spring, a magnetism isolating ring, a permanent magnet, a rotor iron core, a stator winding, a stator iron core and stator iron core teeth, and is characterized in that the stator iron core is installed in the shell, and the permanent magnet is embedded in the rotor iron core; the rotor iron core is installed on the output shaft and fixed to the end supporting covers on the two sides, the magnetism isolating rings are installed at the two ends of the rotor iron core in a pressed mode, and the portions, between the magnetism isolating rings and the end supporting covers, of the output shaft are sleeved with the resonance springs. During working, current is introduced into the stator winding to generate a non-uniform air-gap magnetic field, a resonance system composed of the permanent magnet, the rotor iron core, the resonance spring and the output shaft is driven to do linear motion, and driving force is generated and drives a load to operate. According to the invention, driving and control of a high-speed and high-precision linear direct motion system are realized, and high-power-density operation and required driving capability of an actuator are ensured at the same time.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a high power density transverse magnetic field electromagnetic linear actuator. Background technique [0002] As an energy conversion device and a drive-controlled actuator, the electromagnetic linear actuator can convert one or more types of energy into mechanical energy that directly outputs linear motion, and has obvious advantages in quality, volume and response. , are widely used in applications such as short stroke, large driving force and smooth feed. [0003] At this stage, the traditional cylindrical longitudinal magnetic field actuator reduces its power density and control accuracy due to the cross-coupling effect between the loads; while the transverse magnetic field actuator effectively solves the coupling relationship between the loads and improves the performance of the actuator. High power density, and the decoupling feature is convenient for miniaturization design...

AI Technical Summary

Problems solved by technology

However, due to the inherent spatial three-dimensional magnetic circuit characteristics of transverse magnetic field actuators, the manufacturing process is difficult, which increases the structural complexity of transverse magnetic field actuators and limits the application of transverse magnetic field electromagnetic linear actuators.

[0004] In order to simplify the processing technology, save manufacturing cost, and solve the low power density problem of the traditional cylindrical longitudinal magnetic field actuator, a high power density transverse magnetic field electromagnetic linear actuator structure of the present invention is proposed, which can ensure the control accuracy and reduce the Under the influence of the coupling of dynamic characteristics, the nonlinear output is greatly reduced, and the power density, working reliability and wide application of the actuator are improved.

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