Uninterruptible protection power supply system for magnetic suspension equipment

Abstract

The invention relates to the technical field of magnetic suspension equipment power supply protection, in particular to a magnetic suspension equipment uninterruptible protection power supply system, which comprises a power supply module with an input end connected with an alternating current mains supply end; the input end of the first AC / DC module is connected with the output end of the power supply module, the output end of the first AC / DC module is connected with the magnetic suspension system, and the first AC / DC module is used for converting alternating current into direct current to supply power to the magnetic suspension system; the input end of the charging and discharging assembly is connected with the output end of the power supply module or the output end of the first AC / DC module, the output end of the charging and discharging assembly is connected with the magnetic suspension system, and the charging and discharging assembly is used for charging by using the direct current supplied by the power supply module and providing the direct current to the magnetic suspension system after the alternating current mains supply loses power. According to the invention, under the condition that the external mains supply suddenly loses power, the charging and discharging assembly can still supply power to the magnetic suspension system, and the process that the direct current of the battery pack is inverted and then rectified in a UPS + AC / DC scheme is omitted, so that the power generation efficiency is improved, the battery capacity can be reduced, the conversion rate is improved, and the system cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of power supply protection for magnetic levitation equipment, in particular to an uninterruptible protection power supply system for magnetic levitation equipment. Background Art

[0002] The magnetic levitation high-speed motor relies on the magnetic levitation bearing controller to achieve stable and reliable suspension of the rotor in the center of the mechanical space. Since the magnetic levitation controller is an electronic device, if there is a sudden power failure during the operation of the equipment, the magnetic levitation controller will immediately stop the suspension control. At this time, the high-speed running shaft will no longer be suspended and fall on the stator component of the equipment, causing serious damage to the equipment. At the same time, after the power failure occurs, the control system of the entire unit equipment needs to record the fault information or report the fault, and also hopes to maintain power supply during this process. In response to this problem, a backup power supply solution is currently commonly used to deal with this problem, that is, adding a UPS (uninterruptible power supply) to power the control system of the unit equipment and the magnetic levitation controller; since the UPS is an AC output, AC / DC needs to be added between the DC bus of the UPS and the magnetic levitation controller for voltage matching.

[0003] The problem with the existing solution is that the system adds UPS and AC / DC power supply. When a power failure occurs, the battery pack in the UPS is inverted and then receives uninterrupted DC power supply through AC / DC. The system design is redundant, which reduces the efficiency of power transmission and increases additional costs. In addition, the price of UPS with higher reliability on the market is higher, which increases the system cost. Summary of the invention

[0004] The present application designs an uninterruptible protection power supply system for magnetic levitation equipment, which can maintain the normal working state of the magnetic levitation system in the event of a sudden power failure of the external mains, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: An uninterruptible protection power supply system for magnetic suspension equipment, comprising: A power supply module, the input end of which is connected to the AC mains power supply end; A first AC / DC module, whose input end is connected to the output end of the power supply module and whose output end is connected to the magnetic suspension system, is used to convert alternating current into direct current to supply power to the magnetic suspension system; The charging and discharging component has an input end connected to the output end of the power supply module or the output end of the first AC / DC module, and an output end connected to the magnetic levitation system. It is used to charge with the DC power supplied by the power supply module and provide DC power to the magnetic levitation system after the AC mains fails.

[0006] Furthermore, the charging and discharging assembly includes: An energy storage module, the input end of which is connected to the first DC / DC module or the second AC / DC module, and the output end of which is connected to the magnetic suspension system, is used to store electricity when the mains is normally powered, and to step up / down the stored electricity to the required DC supply voltage in the event of a sudden power failure; The second DC / DC module has an input end connected to the output end of the first AC / DC module, and an output end connected to the input end of the energy storage module, and is used to increase or decrease the voltage of the DC power rectified by the first AC / DC module from the AC mains to the DC charging voltage required by the energy storage module; The second DC / DC module can be replaced by a second AC / DC module, the input end of the second AC / DC module is connected to the output end of the power supply module, and the output end is connected to the input end of the energy storage module, and is used to charge the energy storage module when the mains power supply is normal; The third DC / DC module has an input end connected to the output end of the energy storage module and an output end connected to the magnetic levitation system, and is used to increase or decrease the amount of electricity stored in the energy storage module to the DC power supply voltage required by the magnetic levitation system.

[0007] Furthermore, the energy storage module is a module that can be repeatedly charged and discharged, and is selected from one of a lithium battery, a lead-acid battery, a supercapacitor, a flow battery and a sodium-sulfur battery.

[0008] Compared with the prior art, the present invention has the following beneficial effects: In the case of a sudden power failure of the external mains, the charging and discharging components of the present invention can still supply power to the magnetic levitation system; and even in the case of a magnetic levitation system without a DC power generation component, in the case of a sudden power failure of the external mains, the charging and discharging components can still supply power to the magnetic levitation system, thereby avoiding a more serious suspension failure caused by a short circuit failure of the DC power generation component, and eliminating the process of inverting and rectifying the DC power of the battery pack in the UPS+AC / DC solution, thereby improving the power generation efficiency, reducing the battery capacity, improving the conversion rate, and reducing the system cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The power supply system of the magnetic suspension system corresponding to Example 1; Figure 2 This is the power supply system of the magnetic levitation system corresponding to Example 2.

[0010] The main reference numerals in the figure have the following meanings: 1. Power supply module, 2. First AC / DC module, 3. First AC / DC module, 4. Second DC / DC module, 5. Energy storage module, 6. Third DC / DC module. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] An uninterruptible protection power supply system for magnetic suspension equipment, comprising: A power supply module, the input end of which is connected to the AC mains power supply end; A first AC / DC module, whose input end is connected to the output end of the power supply module and whose output end is connected to the magnetic suspension system, is used to convert alternating current into direct current to supply power to the magnetic suspension system; The charging and discharging component has an input end connected to the output end of the power supply module or the output end of the first AC / DC module, and an output end connected to the magnetic levitation system. It is used to charge with the DC power supplied by the power supply module and provide DC power to the magnetic levitation system after the AC mains fails.

[0013] The charging and discharging components include: An energy storage module, the input end of which is connected to the first DC / DC module or the second AC / DC module, and the output end of which is connected to the magnetic suspension system, is used to store electricity when the mains is normally powered, and to step up / down the stored electricity to the required DC supply voltage in the event of a sudden power failure; The second DC / DC module has an input end connected to the output end of the first AC / DC module, and an output end connected to the input end of the energy storage module, and is used to increase or decrease the voltage of the DC power rectified by the first AC / DC module from the AC mains to the DC charging voltage required by the energy storage module; The second DC / DC module can be replaced by a second AC / DC module, the input end of the second AC / DC module is connected to the output end of the power supply module, and the output end is connected to the input end of the energy storage module, and is used to charge the energy storage module when the mains power supply is normal; The third DC / DC module has an input end connected to the output end of the energy storage module and an output end connected to the magnetic levitation system, and is used to increase or decrease the amount of electricity stored in the energy storage module to the DC power supply voltage required by the magnetic levitation system.

[0014] The energy storage module is a module that can be repeatedly charged and discharged, and is selected from one of a lithium battery, a lead-acid battery, a supercapacitor, a flow battery and a sodium-sulfur battery. Example

[0015] System Configuration: Install the first and second AC / DC modules to ensure stable AC power input.

[0016] Install a third DC / DC module for voltage conversion.

[0017] Install energy storage modules and choose lithium batteries, lead-acid batteries or supercapacitors, etc.

[0018] Normal power supply operation: The first AC / DC module is responsible for converting AC power into DC power for supplying loads.

[0019] The second AC / DC module is responsible for charging the energy storage module to maintain its power.

[0020] Emergency power supply operation: When the city power is interrupted, the third DC / DC module converts the power of the energy storage module into the required voltage to supply the load.

[0021] System monitoring and maintenance: Regularly check the working status of the first, second AC / DC and third DC / DC modules.

[0022] Monitor the charging status and power level of the energy storage modules.

[0023] Maintain the battery management system (BMS) to ensure battery safety and extend battery life.

[0024] Troubleshooting: Set up a fault detection mechanism to immediately switch to the backup power supply once a problem is detected.

[0025] Regular system testing ensures rapid response in emergency situations.

[0026] like Figure 1 As shown, under normal power supply conditions, the electric energy is Figure 1 1# power supply line; when the city power is cut off, the power will be Figure 1 Middle 2# power supply line. Example

[0027] System Configuration: A first AC / DC module is installed for alternating current conversion.

[0028] Install the second and third DC / DC modules for voltage conversion.

[0029] Install energy storage modules and choose lithium batteries, lead-acid batteries or supercapacitors, etc.

[0030] Normal power supply operation: The first AC / DC module is responsible for converting AC power into DC power for supplying loads.

[0031] The second DC / DC module is responsible for charging the energy storage module to maintain its power.

[0032] Emergency power supply operation: When the city power is interrupted, the third DC / DC module converts the power of the energy storage module into the required voltage to supply the load.

[0033] System monitoring and maintenance: Regularly check the working status of the first AC / DC and the second and third DC / DC modules.

[0034] Monitor the charging status and power level of the energy storage modules.

[0035] Maintain the battery management system (BMS) to ensure battery safety and extend battery life.

[0036] Troubleshooting: Set up a fault detection mechanism to immediately switch to the backup power supply once a problem is detected.

[0037] Regular system testing ensures rapid response in emergency situations.

[0038] like Figure 2 As shown, under normal power supply conditions, the electric energy is Figure 2 1# power supply line; when the city power is cut off, the power will be Figure 2 Middle 2# power supply line.

[0039] Additional steps: Environmental adaptability test: Conduct environmental adaptability tests on energy storage modules such as temperature and humidity to ensure stable operation in various environments.

[0040] Safety precautions: Design protection measures such as overcharge, over discharge, and short circuit to prevent battery damage or safety accidents.

[0041] Energy efficiency management: Implement energy efficiency management strategies to optimize energy use and reduce energy consumption.

[0042] Through these steps, the smooth implementation and stable operation of the two solutions can be ensured, while the reliability and security of the system can be improved.

[0043] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

Claims

1. An uninterruptible power supply system for magnetic levitation equipment, characterized in that: include: A power supply module, the input end of which is connected to the AC mains power supply end; A first AC / DC module, whose input end is connected to the output end of the power supply module and whose output end is connected to the magnetic suspension system, is used to convert alternating current into direct current to supply power to the magnetic suspension system; The charging and discharging component has an input end connected to the output end of the power supply module or the output end of the first AC / DC module, and an output end connected to the magnetic levitation system. It is used to charge with the DC power supplied by the power supply module and provide DC power to the magnetic levitation system after the AC mains fails.

2. The uninterruptible power supply system for magnetic suspension equipment according to claim 1, characterized in that: The charging and discharging components include: An energy storage module, the input end of which is connected to the first DC / DC module or the second AC / DC module, and the output end of which is connected to the magnetic suspension system, is used to store electricity when the mains is normally powered, and to step up / down the stored electricity to the required DC supply voltage in the event of a sudden power failure; The second DC / DC module has an input end connected to the output end of the first AC / DC module, and an output end connected to the input end of the energy storage module, and is used to increase or decrease the voltage of the DC power rectified by the first AC / DC module from the AC mains to the DC charging voltage required by the energy storage module; A second AC / DC module, whose input end is connected to the output end of the power supply module, and whose output end is connected to the input end of the energy storage module, is used to charge the energy storage module when the mains power supply is normal; The third DC / DC module has an input end connected to the output end of the energy storage module and an output end connected to the magnetic levitation system, and is used to increase or decrease the amount of electricity stored in the energy storage module to the DC power supply voltage required by the magnetic levitation system.

3. The uninterruptible power supply system for magnetic levitation equipment according to claim 1, characterized in that: The energy storage module is a module that can be repeatedly charged and discharged, and is selected from one of a lithium battery, a lead-acid battery, a supercapacitor, a flow battery and a sodium-sulfur battery.

Images