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EP-4741675-A1 - MAGNETIC SUSPENSION BEARING CONTROL SYSTEM, CONTROL METHOD AND REFRIGERATION EQUIPMENT

EP4741675A1EP 4741675 A1EP4741675 A1EP 4741675A1EP-4741675-A1

Abstract

This application relates to a magnetic suspension bearing control system, a control method and refrigeration equipment (1). The magnetic suspension bearing control system includes: a magnetic suspension bearing control module (100) configured to control a magnetic suspension bearing; a battery management module (200) electrically connected to the magnetic suspension bearing control module (100); and a master control module (300) connected to the magnetic suspension bearing control module (100) and the battery management module (200), and configured to control the battery management module (200) to store electric energy when a voltage of the magnetic suspension bearing control module (100) is excessive, and supply power to the magnetic suspension bearing control module (100) when the magnetic suspension bearing control module (100) is underpowered. The technical solution of the magnetic suspension bearing control system enhances the stability, energy efficiency and response speed of the system through the coordinated operation of the battery management module (200) and the master control module (300), and effectively prolongs the service life of the equipment and reduces the maintenance cost. This integrated solution provides a safer, more reliable and economical operating environment for high-performance and high-precision mechanical equipment.

Inventors

  • CHEN, KUN
  • ZHANG, ZHENYU

Assignees

  • Carrier Corporation

Dates

Publication Date
20260513
Application Date
20251111

Claims (10)

  1. A magnetic suspension bearing control system comprising: a magnetic suspension bearing control module (100) configured to control a magnetic suspension bearing; a battery management module (200) electrically connected to the magnetic suspension bearing control module; and a master control module (300) connected to the magnetic suspension bearing control module and the battery management module, and configured to control the battery management module to store electric energy of the magnetic suspension bearing control module when a voltage of the magnetic suspension bearing control module is excessive, and supply power to the magnetic suspension bearing control module when the magnetic suspension bearing control module is underpowered.
  2. The magnetic suspension bearing control system according to claim 1, wherein the master control module (300) includes: a charging and discharging signal generation module (310) connected to a control terminal of the battery management module (200), and configured to send a corresponding control signal to control charging/discharging of the battery management module based on a signal representing an excess/insufficient input voltage of the magnetic suspension bearing control module (100).
  3. The magnetic suspension bearing control system according to claim 2, wherein the master control module (300) further includes: a voltage determination module (320) connected to the magnetic suspension bearing control module (100) and the charging and discharging signal generation module (310), and configured to determine whether the input voltage of the magnetic suspension bearing control module is excessive/insufficient based on an electrical signal representing the input voltage of the magnetic suspension bearing control module.
  4. The magnetic suspension bearing control system according to any preceding claim, wherein the master control module (300) further includes: a magnetic suspension bearing control signal generation module (330) connected to the magnetic suspension bearing control module (100) and configured to send a corresponding control signal based on an operating status of the magnetic suspension bearing.
  5. The magnetic suspension bearing control system according to any preceding claim, wherein the battery management module (200) includes: a rechargeable battery (220); and a DCDC conversion unit (210) connected to the magnetic suspension bearing control module (100), the master control module (300) and the rechargeable battery, and configured to convert, in response to a control signal of the master control module, a charging voltage input by the magnetic suspension bearing control module to the rechargeable battery and a discharging voltage of the rechargeable battery so as to enable the charging voltage and the discharging voltage to be adapted to the battery management module and the magnetic suspension bearing control module.
  6. The magnetic suspension bearing control system according to claim 5, wherein the DCDC conversion unit (210) includes: an energy storage unit (212) configured to temporarily store charging energy of the magnetic suspension bearing control module (100) and discharging energy of the rechargeable battery (220); and a logic switch unit (211) connected to the master control module (300) and the energy storage unit, and configured to store energy in the energy storage unit through switch control in response to a signal sent by the master control module indicating that the voltage of the magnetic suspension bearing control module (100) is excessive, and release the energy stored in the energy storage unit through switch control in response to a signal sent by the master control module indicating that the voltage of the magnetic suspension bearing control module is insufficient.
  7. The magnetic suspension bearing control system according to claim 6, wherein the logic switch unit (211) includes: a first power switch unit (2111) connected, at a drain, to a positive electrode of a power supply (110) of the magnetic suspension bearing control module (100), connected, at a gate, to a first terminal of the energy storage unit (212), and connected, at a source, to the master control module (300); a second power switch unit (2112) connected, at a drain, to the first terminal of the energy storage unit, connected, at a gate, to negative electrodes of the rechargeable battery (220) and the power supply of the magnetic suspension bearing control module, and connected, at a source, to an output terminal of a logic inverter (2113); and the logic inverter connected, at an input terminal, to the master control module.
  8. The magnetic suspension bearing control system according to claim 6 or 7, wherein the energy storage unit (212) is an inductor.
  9. Refrigeration equipment (1) comprising the magnetic suspension bearing control system according to any preceding claim.
  10. A magnetic suspension bearing control method comprising: detecting a supply voltage of a magnetic suspension bearing; charging a UPS power supply with the supply voltage when the supply voltage is excessive; and supplying power by the UPS power supply when the supply voltage is insufficient.

Description

PRIORITY CLAIM This application claims benefit of Chinese Patent Application No. 202411611983.2, filed November 12, 2024, and all the benefits accruing therefrom under 35 U.S.C. §119, the contents of which in their entirety are herein incorporated by reference. BACKGROUND This application relates to the technical field of refrigeration equipment, in particular to a magnetic suspension bearing control system, a control method and refrigeration equipment. In conventional refrigeration equipment based on a magnetic suspension bearing, there is usually no energy storage device, or even with batteries, the hardware topology of the magnetic suspension bearing and batteries is separate from a software control system thereof. This separation leads to the following problems: energy waste: during operation of the system, especially when a compressor frequency changes, excess energy is not fully utilized and cannot be stored for backup;dynamic performance degradation of magnetic suspension bearing: a traditional system requires time to adjust and stabilize the magnetic suspension bearing during startup and shutdown, and the dynamic performance of the bearing during frequency switching may degrade due to the lack of good energy allocation methods; andpoor system stability: when the system is suddenly powered off, there may be a risk of the magnetic suspension bearing falling, which may cause damage to the magnetic suspension bearing and cause abnormal operation of the system. Therefore, it is necessary to improve the existing magnetic suspension bearing control system. SUMMARY In view of the above problems, this application provides a magnetic suspension bearing control system according to a first aspect of the invention including: a magnetic suspension bearing control module configured to control a magnetic suspension bearing; a battery management module electrically connected to the magnetic suspension bearing control module; and a master control module connected to the magnetic suspension bearing control module and the battery management module, and configured to control the battery management module to store electric energy of the magnetic suspension bearing control module when a voltage of the magnetic suspension bearing control module is excessive, and supply power to the magnetic suspension bearing control module when the magnetic suspension bearing control module is underpowered. The technical effects mainly include the following aspects. Improved system reliability and stability: Through the cooperation of the battery management module and the magnetic suspension bearing control module, the system can automatically provide the backup power when there is a problem with the power supply of the magnetic suspension bearing control module. In this way, when a main power supply fluctuates or is powered off, the magnetic suspension bearing (AMB) can still operate normally, thereby avoiding system failure or shutdown due to insufficient power supply. Especially in high-speed rotating machinery, the stability of the magnetic suspension bearing is critical, and this technology effectively improves the safety and stability of the system. Energy saving and energy management optimization: In this technical solution, the battery management module stores redundant electric energy when a rotational speed demand of the magnetic suspension bearing is relatively low, and releases the stored electric energy when the magnetic suspension bearing is underpowered. The energy management mechanism not only improves the energy utilization efficiency of the system, but also reduces unnecessary energy waste. For example, when the system is in light load or a deceleration mode, an energy demand of the magnetic suspension bearing system is reduced, and the battery can effectively store this excess energy and release the excess energy when needed. Improved dynamic performance and quick response to power supply demands: The battery management module in the system can quickly provide electric energy when the magnetic suspension bearing control module is underpowered, thereby ensuring continuous and stable operation of the magnetic suspension bearing system. This rapid response capability plays an important role especially when the power supply fluctuates, and can compensate for the power gap in time, thereby avoiding system performance degradation or sudden failures. Modular and integrated design and reduced system cost: The master control module is connected to the magnetic suspension bearing control module and the battery management module, thereby implementing centralized control and coordinated operation of the system. Through the integrated control logic, the hardware and software architecture of the system are simplified, and the required control components and cables are reduced, which not only reduces the cost, but also reduces the occupied space of the system, thereby helping to improve the overall compactness and reliability of the e