Universal controller of magnetic suspension bearing

Abstract

The invention relates to a universal controller of a magnetic suspension bearing, which comprises an A / D conversion circuit (1), an FPGA (Field Programmable Gate Array) control circuit (2), a CAN communication interface module (3) and a control signal output module (4), wherein the A / D conversion circuit (1) is used for converting a rotor displacement feedback signal (11) and a coil current feedback signal (12) from the magnetic suspension bearing into a digital signal; the FPGA control circuit (2) comprises an FPGA chip (U3) and a Platform Flash configuration storage matched with the FPGA chip to realize four functions of a suspension control algorithm, a generalized trapped wave algorithm, a three-level pulse width modulation algorithm and a CAN communication control logic algorithm; the communication interface module (3) receives and sends a CAN signal processed by the FPGA control circuit (2) according to a CAN communication protocol; and the control output module (4) outputs the signals processed by the FPGA control circuit (2) in two forms of a multi-path PWM signal (41) and an analog control voltage signal (42). The invention has the characteristics of modularization, high integration and good universality.

Description

technical field [0001] The invention relates to a digital controller of a magnetic suspension bearing. Background technique [0002] Magnetic suspension bearings use electromagnetic force to suspend the rotor, which has the characteristics of no friction, long life, high speed, high precision, etc. It is the basic component for the development of high-precision CNC machining equipment. The controller is a device used to control the suspension, displacement and rotation characteristics of the magnetic suspension bearing during the experiment and debugging phase of the magnetic suspension bearing. The design of the controller is the core work of the electromagnetic bearing design stage. Only by choosing a reasonable control law and controller parameters can the high-performance suspension and high-precision control of the magnetic suspension bearing be realized. In the research and development stage of magnetic suspension bearings, when conducting experiments and debugging fo...

AI Technical Summary

Problems solved by technology

[0005] At present, from the domestic research situation, when it comes to more complex control algorithms such as notch waves, the digital controller of the magnetic suspension bearing often uses the DSP chip as the operation processor of the controller, and the PWM port resources of the commercial off-the-shelf DSP chip are limited. , when there are many degrees of freedom in bearing control, it is difficult for the magnetic bearing controller based on the DSP chip to meet the requirements of integrated control

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