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Integrated device in low power dissipation for digital controlling magnetic bearing

A digital control, magnetic bearing technology, used in bearings, holding devices with magnetic attraction or thrust, shafts and bearings, etc., can solve the problems of reducing the anti-interference ability of the system, increasing the intermediate links of the circuit, etc., to meet the real-time requirements, Simplified circuit, light weight effect

Inactive Publication Date: 2007-06-20
BEIHANG UNIV
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  • Summary
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AI Technical Summary

Problems solved by technology

However, the existing magnetic bearing digital control devices generally use a digital controller plus an analog power amplifier, which requires a D / A link to restore the digital signal generated by the digital controller to an analog signal before it can be connected to the analog power amplifier.
This structure increases the intermediate link of the circuit and reduces the anti-interference ability of the system

Method used

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  • Integrated device in low power dissipation for digital controlling magnetic bearing
  • Integrated device in low power dissipation for digital controlling magnetic bearing
  • Integrated device in low power dissipation for digital controlling magnetic bearing

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Embodiment Construction

[0021] As shown in Figures 1 and 2, the present invention includes an interface circuit 10, a DSP system 4, and a power module 11, wherein the interface circuit 10 includes a displacement sensor interface circuit 1, a rotational speed signal interface circuit 2, and a current sensor interface circuit 3, and the power module 11 includes High-speed photoelectric isolation circuit 5, pulse protection drive circuit 6, full bridge transducer circuit 7, current sensor 8, magnetic bearing displacement sensor The displacement signal of 5 degrees of freedom output by the displacement sensor is connected to the DSP system through the displacement sensor interface circuit 1 4. The Hall sensor is connected to the DSP system 4 through the speed signal interface circuit 2, the current sensor 8 is connected to the DSP system 4 through the current sensor interface circuit 3, and the DSP system 4 respectively samples the displacement signals of 5 degrees of freedom output by the displacement sen...

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Abstract

In use for initiative controlling magnetic bearing, the disclosed device includes interface circuit, DSP system, and power module. Through interface circuit, DSP obtains data including displacement signal of rotor of magnetic bearing, coil current, signal of rotate speed etc. According algorithm, calculation is carried out for creating controlling quantities. After PWM modulation, the modulated PWM signal of controlling quantities passed through pulse protection dirve circuit is transferred to full bridge type transduction circuit composed of power devices. The full bridge type transduction circuit generates control current needed for winding of magnetic bearing so as to realize initiative controlling magnetic bearing. The invention realizes integration design for digital controller and digital power amplifier of magnetic bearing. Thus, integrity of controller of magnetic bearing is raised greatly, size and weight are reduced, and power consumption of the controller is lowered.

Description

Technical field [0001] The invention relates to an integrated, low-power magnetic bearing digital control device, which is used for active control of the magnetic bearing, and is especially suitable for occasions such as low power consumption and high integration. Background technique [0002] Active magnetic bearings are high-tech mechatronic products that have broad application prospects in aerospace, turbomachinery, vacuum technology, and machine tools. [0003] The existing magnetic bearing controllers are divided into two categories: analog controllers and digital controllers. The core of the analog controller is an operational amplifier, which has the advantages of fast response and high reliability, but the biggest problem of the analog controller is its inflexibility and poor anti-interference ability, which is manifested in the difficulty of modifying control parameters, the complicated debugging process, and the difficulty of comparison Complex control algorithm. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N15/00F16C32/04
Inventor 房建成田希晖刘刚樊亚洪刘虎
Owner BEIHANG UNIV
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