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Magnetic suspension bearing control method and device

A technology of a magnetic suspension bearing and a control method, which is applied to bearings, shafts and bearings, and calculations expressed by a number system, etc., can solve the problems of occupying a large DSP memory space, reducing control efficiency, and consuming a large amount of running time, so as to improve control efficiency. , Improve utilization, save memory space effect

Active Publication Date: 2017-11-24
GREE ELECTRIC APPLIANCES INC
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AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned prior art solutions, considering efficiency and cost, since the DSP program runs in a serial manner, this bearing control method needs to consume a large amount of running time, and also takes up a large amount of DSP memory space, reducing control efficiency

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  • Magnetic suspension bearing control method and device
  • Magnetic suspension bearing control method and device

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Embodiment Construction

[0026] refer to Figure 2 to Figure 4 , the magnetic suspension bearing control method proposed by the present invention first sets the reference displacement value X of the rotor ref The feedback value X of the rotor deviation from the reference position fed back by the displacement sensor fdb The difference is calculated in the DSP for position adjustment to obtain the control current I ref ; Then in the FPGA will control the current value I ref with the feedback current value of the bearing coil I fdb The current is adjusted by the calculation of the difference, and after the calculation, a PWM wave with a certain duty ratio is output, which is used as the control input signal of the power amplifier, and finally the suspension control of the rotor is realized.

[0027] In the present invention, the current adjustment is set in the FPGA. Since the programming language adopted by the FPGA is not only a behavior description language, but also a structure description languag...

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Abstract

The invention discloses a magnetic suspension bearing control method and a magnetic suspension bearing control device. The method comprises the following steps: S10, acquiring a feedback value Xfdb of a bearing rotor deviation reference position and performing position adjustment in DSP to acquire control current Iref; S11, receiving the input control current Iref input by an FPGA chip, performing current adjustment in FPGA, and outputting a control signal; S12, receiving the control signal output by the FPGA by a power amplifier and processing the control signal to control the current value of a bearing coil, so that the position of the bearing rotor is controlled and the rotor can stably suspend in the reference position. The current adjustment is arranged in the FPGA and the control efficiency of the bearing system can be greatly improved; in addition, a current adjustor is conducted in the FPGA and the internal memory space of the DSP is saved, so that the utilization rate of the whole control system is greatly increased.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension bearing control, in particular to a magnetic suspension bearing control method and device. Background technique [0002] The magnetic levitation centrifuge adopts magnetic bearings, which are affected by magnetic force during operation. The shaft and bearings rotate without contact, which reduces the energy loss caused by gear transmission. The system, which is a device that works in an oil-free and friction-free state, has the advantages of high speed and maintenance-free. [0003] The magnetic suspension bearing is a complex electromechanical coupling system, which is composed of two parts: the mechanical system and the control system. The conventional magnetic suspension bearing control method is to use the controller (DSP) + programmable logic controller (FPGA) to levitate the bearing. control, such as figure 1 shown. In the existing magnetic suspension bearing control scheme, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04G06F7/50
CPCF16C32/0446F16C32/0451G06F7/50
Inventor 胡叨福赵子静贺永玲
Owner GREE ELECTRIC APPLIANCES INC
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