CN-122014748-A - Magnetic suspension bearing control system, control method and refrigeration equipment

CN122014748ACN 122014748 ACN122014748 ACN 122014748ACN-122014748-A

Abstract

The invention relates to a magnetic bearing control system, a control method and refrigeration equipment, wherein the magnetic bearing control system comprises a magnetic bearing control module, a battery management module and a total control module, wherein the magnetic bearing control module is configured to control a magnetic bearing, the battery management module is electrically connected with the magnetic bearing control module, and the total control module is respectively connected with the magnetic bearing control module and the battery management module and can control the battery management module to store electric energy when the voltage of the magnetic bearing control module is excessive and supply power for the magnetic bearing control module when the power supply of the magnetic bearing control module is insufficient. The technical scheme of the magnetic suspension bearing control system enhances the stability, energy conservation and response speed of the system through the cooperative work of the battery management module and the total control module, effectively prolongs the service life of equipment and reduces the maintenance cost. The integrated solution provides a safer, more reliable and economical operating environment for high-performance, high-precision mechanical equipment.

Inventors

CHEN KUN
ZHANG ZHENYU

Assignees

开利公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (10)

1. A magnetic bearing control system, comprising: a magnetic bearing control module configured to control the magnetic bearing; A battery management module electrically connected with the magnetic suspension bearing control module, and The total control module is respectively connected with the magnetic bearing control module and the battery management module, and can control the battery management module to store the electric energy of the magnetic bearing control module when the voltage of the magnetic bearing control module is excessive and supply power for the magnetic bearing control module when the power supply of the magnetic bearing control module is insufficient.
2. The magnetic bearing control system of claim 1, wherein the overall control module comprises: And the charge and discharge signal generation module is connected with the control end of the battery management module and can send corresponding control signals to control the battery management module to charge/discharge based on signals representing the surplus/shortage of the input voltage of the magnetic suspension bearing control module.
3. The magnetic bearing control system of claim 2, wherein the overall control module further comprises: The voltage judging module is connected with the magnetic bearing control module and the charging and discharging signal generating module and can judge whether the input voltage of the magnetic bearing control module is excessive or insufficient based on an electric signal representing the input voltage of the magnetic bearing control module.
4. A magnetic bearing control system according to any of claims 1-3, wherein the overall control module further comprises: the magnetic bearing control signal generation module is connected with the magnetic bearing control module and can send corresponding control signals based on the running state of the magnetic bearing.
5. A magnetic bearing control system according to any one of claims 1-3, wherein the battery management module comprises: Rechargeable battery, and And the DCDC conversion unit is connected with the magnetic bearing control module, the total control module and the rechargeable battery, and can respond to the control signal of the total control module to convert the charging voltage input to the rechargeable battery by the magnetic bearing control module and the discharging voltage of the rechargeable battery so that the charging voltage and the discharging voltage are adapted to the battery management module and the magnetic bearing control module.
6. The magnetic bearing control system according to claim 5, wherein the DCDC conversion unit includes: an energy storage unit capable of temporarily storing the charge energy of the magnetic bearing control module and the discharge energy of the rechargeable battery, and The logic switch unit is connected with the total control module and the energy storage unit, and can store energy in the energy storage unit through switch control in response to the condition that the total control module sends signals representing that the voltage of the magnetic bearing control module is excessive, and release the energy stored in the energy storage unit through switch control in response to the condition that the total control module sends signals representing that the voltage of the magnetic bearing control module is insufficient.
7. The magnetic bearing control system of claim 6, wherein the logic switch unit comprises: The first power switch unit is characterized in that the drain electrode is connected with the positive electrode of the power supply of the magnetic suspension bearing control module, the grid electrode is connected with the first end of the energy storage unit, and the source electrode is connected with the total control module; A second power switch unit having a drain connected to the first end of the energy storage unit, a gate connected to the rechargeable battery and the negative electrode of the power supply of the magnetic bearing control module, a source connected to the output of the logic inverter, and The input end of the logic reverser is connected with the master control module.
8. The magnetic bearing control system of claim 6, wherein the energy storage unit is an inductor.
9. A refrigeration device comprising a magnetic bearing control system as claimed in any one of claims 1 to 8.
10. The control method of the magnetic suspension bearing is characterized by comprising the following steps: Detecting the power supply voltage of the magnetic suspension bearing; if the power supply voltage is excessive, charging the UPS power supply with the power supply voltage, and And if the power supply voltage is insufficient, using the UPS power supply to supply power.

Description

Magnetic suspension bearing control system, control method and refrigeration equipment Technical Field The invention relates to the technical field of refrigeration equipment, in particular to a magnetic suspension bearing control system, a magnetic suspension bearing control method and refrigeration equipment. Background In conventional refrigerating devices based on magnetic bearings (magnetic bearings), the energy storage device is usually not included, or even if there is a battery, the hardware topology of the magnetic bearings and the battery is separated from the software control system. This separation causes the following problems: And energy waste, namely, in the running process of the system, especially when the frequency of the compressor is changed, the redundant energy is not fully utilized and cannot be stored for standby. The dynamic performance of the magnetic suspension bearing is reduced, namely, the traditional system needs time to adjust and stabilize the magnetic suspension bearing in the starting and closing processes, and the dynamic performance of the bearing in the frequency switching process is possibly reduced due to the fact that a good energy allocation means is not available. The stability of the system is poor, when the system is suddenly powered off, there may be a risk of the magnetic bearings falling, which may cause damage to the magnetic bearings and cause abnormal operation of the system. Accordingly, there is a need for improvements over existing magnetic bearing control systems. Disclosure of Invention In view of the above problems, the present invention provides a magnetic bearing control system, comprising: a magnetic bearing control module configured to control the magnetic bearing; A battery management module electrically connected with the magnetic suspension bearing control module, and The total control module is respectively connected with the magnetic bearing control module and the battery management module, and can control the battery management module to store the electric energy of the magnetic bearing control module when the voltage of the magnetic bearing control module is excessive and supply power for the magnetic bearing control module when the power supply of the magnetic bearing control module is insufficient. The technical effects mainly comprise the following aspects: Improving system reliability and stability Through the cooperation of battery management module and magnetic suspension bearing control module, the system can provide standby power when the power supply of magnetic suspension bearing control module goes wrong automatically. This ensures that the magnetic bearing (AMB) can still function properly in case of fluctuation or power failure of the main power supply, avoiding system failure or shutdown due to insufficient power supply. Especially in high-speed rotating machinery, the stability of the magnetic suspension bearing is important, and the technology effectively improves the safety and stability of the system. Energy saving and energy management optimization: According to the technical scheme, redundant electric energy is stored through the battery management module when the rotating speed requirement of the magnetic suspension bearing is low, and the stored electric energy is released when the power supply of the magnetic suspension bearing is insufficient. 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 a light load or deceleration mode, the energy requirements of the magnetic bearing system are reduced and the battery can effectively store this excess energy for further release when needed. Dynamic performance is improved, and power supply requirements are responded quickly: The battery management module in the system can rapidly provide electric energy when the magnetic bearing control module is insufficient in power supply, so that continuous and stable operation of the magnetic bearing system is ensured. The quick response capability plays an important role especially when the power supply fluctuates, and can timely make up a power gap, so that system performance is prevented from being reduced or sudden faults are avoided. The modularization and integration design is realized, and the system cost is reduced: The main control module is connected with the magnetic suspension bearing control module and the battery management module, so that the centralized control and the coordinated operation of the system are realized. By integrating control logic, the hardware and software architecture of the system is simplified, the required control components and cables are reduced, the cost is reduced, the occupied space of the system is reduced, the overall compactness and reliability of the device are improved, in some preferred embodiments, at least part of circuits in the overall control module, the magneti