Current control method and system of magnetic levitation planar motor

Abstract

The embodiment of the invention discloses a current control method and system of a magnetic levitation planar motor. The current control method comprises the following steps: establishing a current loop model of the magnetic levitation planar motor, and acquiring current loop input and current loop output; identifying inductance parameters of the current loop model according to the current loop input and the current loop output; and solving an optimal parameter of a controller of the magnetic levitation planar motor according to the inductance parameter. Compared with the prior art, the current control method of the invention improves the precision of the current loop model and realizes the high-precision movement of the magnetic suspension planar motor.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of motor control, and in particular to a current control method and system for a magnetic levitation planar motor. Background technique [0002] Magnetic levitation planar motor is a new type of two-dimensional planar direct drive device, which has the advantages of simple structure, low cost, low heat consumption and high reliability, and has great application prospects in the field of micro-nano ultra-precision manufacturing. The high-precision operation of the magnetic levitation planar motor is currently the focus of various research institutions and industries. The precise current directly affects the high-precision operation of the magnetic levitation planar motor. key technical issues. [0003] In the prior art, the current control method of the magnetic levitation planar motor generally regards the current loop as a first-order model, and then designs a controller to realize cu...

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Problems solved by technology

[0004] (1) The method of equating the current loop to a first-order model is easy to calculate and easy to implement, but it does not consider the negative impact of output noise and actual system delay, resulting in a large difference between the simulation model and the actual model, which is more difficult Obtain the optimal control parameters of the actual system;

[0005] (2) Because the inductor is affected by factors such as current, the current loop model is essentially a time-varying model, and it is difficult for the existing fixed-parameter controller to achieve high-precision control of the current

[0006] To sum up, the current control method of the existing maglev planar motor has the problem of low accuracy of the current loop model, which leads to the low precision of the motion control of the maglev planar motor.

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