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Full digital driving controller of permanent magnetic linear voice coil motor used for direct driving valve

A drive controller and digital controller technology, applied in digital control, motor control, control using feedback, etc., can solve the problems of temperature drift, inconvenient debugging, and inability to directly realize the interface, so as to improve reliability, data The transmission rate is fast and the effect of electrical isolation is realized

Inactive Publication Date: 2011-04-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

It has some shortcomings inherent in analog control, such as inconvenient debugging, temperature drift, and inability to directly interface with other digital controllers

Method used

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  • Full digital driving controller of permanent magnetic linear voice coil motor used for direct driving valve
  • Full digital driving controller of permanent magnetic linear voice coil motor used for direct driving valve
  • Full digital driving controller of permanent magnetic linear voice coil motor used for direct driving valve

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Experimental program
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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] figure 1 The DSP in it adopts the high-performance floating-point DSPTMS320VC33 of Texas Instruments, which has low power consumption, 3.3VI / O power supply, and 1.8V core power supply. Interface, the external expansion Flash Rom is used to store the program of DSP. The FPGA adopts the EP2C35 of Altera Company of the United States. The FPGA has 35000 programmable logic elements (LE), and the 14-bit A / D converter of the American ADI Company and the multi-channel analog switch of the American Maxim Company are externally expanded to control the winding current of the moving coil. And the sampling of the moving coil position signal. The PWM control signal generated by the FPGA is transmitted to the H-bridge power main circuit composed of the intelligent power module IPM through a high-speed optocoupler.

[0045] The working process of the system: First, use the F...

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Abstract

The invention relates to a full digital driving controller of a permanent magnetic linear voice coil motor used for a direct driving valve, consisting of three parts: a digital controller, a power circuit and a signal detection circuit; the digital controller circuit comprises a 32-bit floating point DSP, a field programmable logic device FPGA and an external Flash ROM; the power circuit comprisesa high-speed optical coupling isolation circuit, and an H-bridge power main circuit consisting of intelligent power modules IPM; the signal detection circuit comprises an A / D converter, a multi-pathanalogue switch, a Hall current sensor used for detecting the moving coil winding current, a non-contact eddy current displacement sensor used for detecting the position of the moving coil and an amplification and active power filter circuit for analogue signals. The full digital driving controller of the permanent magnetic linear voice coil motor used for the direct driving valve has the advantages of high integration, good extensibility, high reliability, high frequency response and high precision.

Description

technical field [0001] The invention belongs to the field of motor automatic control, in particular to an all-digital drive controller for a permanent magnet linear voice coil motor directly driving a valve. Background technique [0002] Permanent magnet linear voice coil motor has the advantages of high acceleration, high speed, small size, good force characteristics, and convenient control. It is used in motion systems that require high acceleration, high frequency response, fast and high-precision positioning. Therefore, in recent years, almost all direct drive servo valves with high frequency response and large flow rate above hundreds of hertz adopt the direct drive structure of linear voice coil motor. To achieve these excellent performances, higher requirements are put forward for the calculation accuracy and calculation speed of the drive controller of the permanent magnet linear voice coil motor. At the same time, in industrial applications, the drive controller is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/18G05D3/20H02P29/00H02P25/034
Inventor 郭宏王大彧于凯平李艳明马鑫刘治
Owner BEIHANG UNIV
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