A linear rotary switched reluctance motor and its control method

Abstract

The invention discloses a linear rotary switch reluctance motor and a control method therefor. The motor comprises one rotor iron core and two stator iron cores; the two stator iron cores are arranged side by side in a rotary shaft direction of the motor; a set of torque winding and a set of axial force winding are mounted on tooth poles of the two stators; the torque winding transversely crosses the tooth poles of the two stators for controlling torque; the axial force winding and the torque winding are wound around the tooth poles of one stator in a homodromous manner and then wound around the tooth poles of the other stator in an opposite direction manner for controlling axial force; and the current on the torque winding flows in a unidirectional manner while the current on the axial force winding flows in a bidirectional manner. Independent control of rotary and linear movement of the linear rotary switch reluctance motor is realized, and the axial length of the motor is shortened.

Description

technical field [0001] The invention belongs to the technical field of switched reluctance motors, and particularly relates to a linear rotary switched reluctance motor. Background technique [0002] Traditional single-degree-of-freedom motors achieve only one form of motion, such as rotary motion or linear motion. In some specific applications, such as robot control, industrial production, ship propulsion, artillery turntable, aerospace vehicles, etc., the drive system needs to have the ability to generate multi-dimensional motion. One of the solutions based on this requirement is to combine multiple single-degree-of-freedom motors through a mechanical transmission mechanism to achieve multi-dimensional drive functions. However, this method not only leads to a larger volume and weight of the system, but also reduces the control precision of the system due to the clearance of each transmission mechanism. Therefore, a linear rotary motor with a two-degree-of-freedom drive f...

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Problems solved by technology

The structure of the LRSRM based on the first idea is simple, but the same stator winding needs to control the torque required to generate rotary motion and the axial force required to generate linear motion, so the coupling degree of linear motion and rotary motion control is relatively low. High, need to design more complex decoupling control algorithm

Although the LRSRM based on the second idea can independently control the linear motion and the rotary motion by different stator windings, it will introduce more stator windings and corresponding hardware controllers, which not only increases the axial length of the motor, but also make the system larger and more complex

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