A digital power supply device for the control system of magnetic levitation molecular pump

A digital power supply and control system technology, applied in the control system, output power conversion device, AC motor control, etc., can solve the problem of inability to effectively compensate the nonlinear and time-varying characteristics of switching converters, and the lack of industrial bus communication functions, etc. problem, to achieve the effect of improving reliability, ensuring steady-state accuracy, and improving response bandwidth

Inactive Publication Date: 2016-08-17
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem of the present invention is to overcome the defects that the switching power supply system of the existing maglev molecular pump system cannot effectively compensate the nonlinear and time-varying parameters of the switching converter and does not have the function of industrial bus communication, and proposes a DSP is the control core, digital power supply with power failure compensation based on permanent magnet motor energy feedback and industrial field bus communication function

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  • A digital power supply device for the control system of magnetic levitation molecular pump
  • A digital power supply device for the control system of magnetic levitation molecular pump
  • A digital power supply device for the control system of magnetic levitation molecular pump

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Embodiment Construction

[0035] Such as figure 1 As shown, the present invention mainly consists of AC / DC converter module 2, high-voltage DC / DC module 3, self-power supply module 4, DSP control module 5, CAN communication interface module 6, HMI man-machine interface device 7 and low-voltage DC / DC module 8 composition. The AC / DC module 2 and the self-power supply module 4 are connected to the single-phase 220V AC power supply of the motor control system 1. When the system starts normally, the self-power supply module 4 first provides the control +15V power supply to the DSP control module 5, and the DSP control module 5 according to The output of the first voltage sensor 9, the second voltage sensor 10 and the current sensor 13 is used as feedback, and the PWM signal is output through the current and voltage closed-loop control to control the switching tube in the AC / DC converter module, complete the AC / DC conversion, and output +40V At the same time, the DSP control module 5 uses the output of the ...

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Abstract

A digital power supply device for a magnetic suspension molecular pump control system mainly comprises an AC / DC converter module, a self-powered module, a DSP control module, a low voltage DC / DC module, a CAN communication interface module and an HMI man-machine interface module. When the digital power supply device runs, output of a voltage sensor and a current sensor is adopted to serve as feedback according to a given voltage value through the DSP control module, switch devices in a high voltage DC / DC module and the AC / DC converter module are controlled through PWM, and a double closed loop control system of current and voltage is formed, voltage output of both the AC / DC converter module and the high voltage DC / DC module serves as input of a power amplification power supply of a magnetic bearing and the low voltage DC / DC module, and output of the low voltage DC / DC module serves as a control power supply of a magnetic bearing system. When an external power grid fails, the high voltage DC / DC module performs voltage conversion by means of feedback energy of a motor and continues to provide electric energy for the magnetic bearing system, and a power down protection function of the magnetic bearing is achieved.

Description

technical field [0001] The invention relates to a digital power supply device for a magnetic levitation molecular pump control system, which can provide the required power supply for the magnetic bearing system and the motor control system in the magnetic levitation molecular pump system. The form of UPS or permanent magnet motor energy feedback can provide real-time compensation for the power supply of the magnetic bearing system, which is especially suitable for high-speed magnetic levitation molecular pump control systems that require high reliability of power supply. In addition, this digital power supply unit is also suitable for other magnetic bearing control systems. Background technique [0002] The ultra-high vacuum system is an indispensable key instrument and equipment for the development of my country's cutting-edge scientific instruments, core devices in the national defense field, and high-tech industrial process equipment, and is a key technical bottleneck res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/34H02P27/08
Inventor 郑世强张樱子刘刚李红韩邦成毛琨
Owner BEIHANG UNIV
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