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Flywheel magnetic bearing control system and method

A control system and magnetic bearing technology, applied in the field of control, can solve problems such as safety accidents, damage to magnetic bearings and motors, and achieve the effect of improving reliability and effectiveness

Pending Publication Date: 2021-12-14
BEIJING HONGHUI INT ENERGY TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the continuous rotation of the flywheel rotor, the electromagnetic bearing can always output control force under the action of the magnetic levitation controller to keep the rotor suspended in the center of the cavity. Once the suspension fails, the flywheel rotor will collide with the housing at high speed, and the electromagnetic bearing and the motor will be damaged , causing safety accidents

Method used

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  • Flywheel magnetic bearing control system and method
  • Flywheel magnetic bearing control system and method
  • Flywheel magnetic bearing control system and method

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Embodiment 1

[0050] Compared with other energy storage methods, flywheel energy storage technology has the advantages of instantaneous high power, fast charging and discharging, high energy density and power density, long life and low environmental pollution, and is currently one of the advanced physical energy storage technologies in the field of energy storage. one. The reason why the flywheel system can achieve high speed, high power and long life is closely related to the magnetic suspension bearing support technology adopted. The flywheel can only achieve high speed rotation and fast energy storage and energy release process under the premise of reliable suspension;

[0051]At the same time, magnetic bearing levitation control requires closed-loop control based on the real-time displacement of the flywheel rotor, and obtaining the displacement value between the flywheel rotor relative to the housing is one of the key elements to realize the reliable levitation of the magnetic bearing. ...

Embodiment 2

[0085] figure 2 It is a flow chart of the control method of the flywheel magnetic bearing provided by Embodiment 2 of the present invention.

[0086] refer to figure 2 , the control method of the flywheel magnetic bearing comprises the following steps:

[0087] The system includes a displacement sensor, a bottom processing board and an upper main control board, and an FPGA is arranged on the bottom processing board;

[0088] Step S101, the displacement sensor collects the displacement signal between the flywheel rotor relative to the casing, and converts the displacement signal into an analog voltage signal;

[0089] Here, the displacement signal between the flywheel rotor relative to the casing includes the displacement signal of the upper radial magnetic bearing on the X axis, the displacement signal of the upper radial magnetic bearing on the Y axis, the displacement signal of the lower radial magnetic bearing on the X axis, the displacement signal of the lower radial m...

Embodiment 3

[0100] image 3 It is a flow chart of the FPGA software control method provided by Embodiment 3 of the present invention.

[0101] refer to image 3 , FPGA software control method comprises the steps:

[0102] Step S201, the flywheel magnetic bearing system is powered on, and the power supply of the upper main control board, FPGA and lower processing board is normal;

[0103] Step S202, the FPGA program runs autonomously, and completes the bureau setting and system initialization; including library function database call, function sub-module declaration, signal variable definition and sub-module instantiation, etc.;

[0104] Here, FPGA is a software framework based on VHDL language; the library function is libarary IEEE, and three sets of databases are used: IEEE.STD_LOGIC_1164.AL, IEEE.STD_LOGIC_ARITH.ALL and IEEE.STD_LOGIC_UNSIGNED.ALL. Each functional sub-module includes the global clock signal, the bus signal between the upper main control board DSP and FPGA (including ...

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Abstract

The invention provides a flywheel magnetic bearing control system and method. The system comprises a displacement sensor, a bottom layer processing board and an upper layer main control board, and the bottom layer processing board is provided with an FPGA; the displacement sensor and the upper layer main control board are respectively connected with the FPGA; the displacement sensor is used for collecting a displacement signal of a flywheel rotor relative to a shell and converting the displacement signal into an analog voltage signal; the upper layer main control board is used for processing the displacement signal and a preset reference displacement signal through a closed-loop control algorithm to obtain a PWM duty ratio of a switching tube of a power amplifier board; and the FPGA is used for converting the analog voltage signal to obtain a digital signal, generating a PWM switch control signal according to the PWM duty ratio of the switching tube of the power amplifier board, and sending the PWM switch control signal sent to the power amplifier board, so that the power amplifier board adjusts the voltage of a magnetic bearing, reliable suspension is continuously provided for high-speed rotation of the flywheel rotor, and the reliability and effectiveness of a magnetic bearing system are improved.

Description

technical field [0001] The invention relates to the field of control technology, in particular to a control system and method for a flywheel magnetic bearing. Background technique [0002] The flywheel adopts pure electromagnetic suspension bearing support technology. During the rotation of the flywheel, its rotor can realize non-contact suspension in the direction of five degrees of freedom (taking the three coordinates of x, y, and z as an example, it can be translated in the two axes of x and y and The direction of rotation and the direction of translation of the z-axis, a total of five directions to achieve central suspension control), that is, there is no contact, no friction, and no loss between the flywheel rotor and the housing. [0003] The reliable control of the flywheel magnetic bearing is one of the key technologies to ensure the safety, reliability and stable operation of the flywheel, and it is a reliable guarantee for the reliable suspension, online monitorin...

Claims

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Application Information

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IPC IPC(8): F16C32/04
CPCF16C32/0444F16C32/0446F16C32/0453F16C32/0455F16C32/0493F16C2361/55Y02E60/16
Inventor 李树胜王佳良李光军汪大春
Owner BEIJING HONGHUI INT ENERGY TECH DEV CO LTD
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