CN210806833U - Power protection system and magnetic suspension air blower - Google Patents
Power protection system and magnetic suspension air blower Download PDFInfo
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- CN210806833U CN210806833U CN201921691014.7U CN201921691014U CN210806833U CN 210806833 U CN210806833 U CN 210806833U CN 201921691014 U CN201921691014 U CN 201921691014U CN 210806833 U CN210806833 U CN 210806833U
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Abstract
The application relates to a power protection system and magnetic suspension air-blower, wherein, this system includes: the input end of the power conversion module is used for connecting an external input power supply; the input end of the uninterruptible power supply is connected with the output end of the power supply conversion module; the first input end of the power supply seamless converter is connected with the output end of the uninterrupted power supply, the second input end of the power supply seamless converter is connected with the output end of the power supply conversion module, and the detection end of the power supply seamless converter is connected with the controller; and the input end of the first direct current stabilized power supply is connected with the output end of the power supply seamless converter, and the output end of the first direct current stabilized power supply is connected with a magnetic suspension system for maintaining the suspension of the motor spindle. The power supply protection device can timely generate a warning effect when the uninterruptible power supply fails, can supply power by seamlessly switching the power supply, enhances the power supply protection mechanism, and improves the power supply reliability.
Description
Technical Field
The application relates to the technical field of magnetic suspension air blowers, in particular to a power supply protection system and a magnetic suspension air blower.
Background
The magnetic suspension blower can provide air for a sewage biochemical system and provide dissolved oxygen required by activated sludge microorganisms so as to ensure the oxygen demand in the microbial metabolic process. Compared with the traditional blower (such as a Roots blower), the magnetic suspension blower has the advantages of energy saving and high efficiency. When the magnetic suspension air blower is started, the magnetic suspension system controls the motor spindle to suspend, and the frequency converter supplies power to the motor to control the motor spindle to rotate. Because the motor spindle is in a suspension state, the spindle is low in abrasion and high in rotating speed, but when a power supply (such as a UPS power supply and/or an external power supply) fails and is powered off, the motor spindle falls down in a high-speed running state, an auxiliary bearing and an impeller are damaged, and even the motor spindle is damaged.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: when the traditional external power supply is combined with the UPS to maintain the system power supply, if the UPS is suddenly powered off or fails, a motor spindle and a bearing are easily damaged, and the power supply reliability is low.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a power protection system and a magnetic suspension blower for solving the problems that when the system is maintained to supply power by combining an external power supply with a UPS, if the UPS is suddenly powered off or fails, a motor spindle and a bearing are easily damaged, and the reliability of power supply is low.
In order to achieve the above object, an embodiment of the present invention provides a power protection system, including:
the input end of the power conversion module is used for connecting an external input power supply;
the input end of the uninterruptible power supply is connected with the output end of the power supply conversion module;
the first input end of the power supply seamless converter is connected with the output end of the uninterrupted power supply, the second input end of the power supply seamless converter is connected with the output end of the power supply conversion module, and the detection end of the power supply seamless converter is connected with the controller; the first input end and the second input end are not conducted at the same time;
the input end of the first direct current stabilized power supply is connected with the output end of the power supply seamless converter, and the output end of the first direct current stabilized power supply is connected with the magnetic suspension system; the magnetic suspension system is used for maintaining the main shaft of the motor to be suspended;
the controller triggers an alarm and conducts a second input end of the power supply seamless converter according to the fault condition of the uninterrupted power supply.
In one embodiment, the power supply further comprises a second direct current stabilized power supply connected between the controller and the output end of the power supply seamless converter.
In one embodiment, the power seamless converter comprises a first power processing module and a second power processing module;
the input end of the first power supply processing module is connected with the uninterruptible power supply, and the output end of the first power supply processing module is connected with a first direct-current stabilized power supply; the input end of the second power supply processing module is connected with the power supply conversion module, and the output end of the second power supply processing module is connected with the first direct current stabilized power supply.
In one embodiment, the power seamless converter further comprises a fault detection circuit connected with the first power processing module; the fault detection circuit is connected with the controller.
In one embodiment, the first power processing module comprises a first rectifying module connected with the uninterruptible power supply, and a first filtering module connected between the first rectifying module and the first direct current stabilized power supply.
In one embodiment, the second power processing module comprises a second rectifying module connected with the power conversion module, and a second filtering module connected between the second rectifying module and the second direct current stabilized power supply.
In one embodiment, the uninterruptible power supply includes an energy storage module connected between the power conversion module and the power seamless converter.
In one embodiment, the power conversion module is a transformer.
On the other hand, the embodiment of the utility model provides a magnetic suspension air-blower, including the motor, connect the converter between motor and external input power for the magnetic suspension system of the main shaft suspension of maintaining the motor and as above-mentioned any one power protection system.
In one embodiment, the motor is a permanent magnet synchronous motor or an asynchronous motor.
One of the above technical solutions has the following advantages and beneficial effects:
the input end based on the uninterrupted power supply is connected with the output end of the power supply conversion module; the input end of the first direct current stabilized power supply is connected with the power supply seamless converter, and the output end of the first direct current stabilized power supply is connected with the magnetic suspension system; the first input end of the power supply seamless converter is connected with the output end of the uninterruptible power supply, the second input end of the power supply seamless converter is connected with the output end of the power supply conversion module, and the detection end of the power supply seamless converter is connected with the controller. The controller can generate an alarm according to the fault condition of the uninterruptible power supply (for example, the fault condition of the uninterruptible power supply is determined when the output of the uninterruptible power supply is disconnected), and simultaneously switches and conducts a transmission channel between the transformer and the direct-current stabilized voltage power supply, so that the fault alarm of the power supply is realized, and meanwhile, the seamless switching of the power supply is realized. Through increasing the seamless converter of power in air-blower power supply circuit system, can in time produce the warning effect when uninterrupted power source breaks down, can switch over to mains supply simultaneously, strengthened the power supply protection mechanism, improved the power supply reliability.
Drawings
FIG. 1 is a schematic diagram of a first configuration of a power protection system in one embodiment;
FIG. 2 is a schematic diagram of a second configuration of the power protection system in one embodiment;
FIG. 3 is a schematic diagram of a third configuration of a power protection system in accordance with an embodiment;
FIG. 4 is a fourth schematic diagram of an embodiment of a power protection system;
fig. 5 is a schematic view of a first structure of a magnetic levitation blower in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, as shown in fig. 1, there is provided a power protection system, comprising:
the power conversion module 110, an input end of the power conversion module 110 is used for connecting an external input power supply;
the input end of the uninterruptible power supply 120 is connected with the output end of the power supply conversion module 110;
a first input end of the power seamless converter 130 is connected with an output end of the uninterruptible power supply 120, a second input end of the power seamless converter 130 is connected with an output end of the power conversion module 110, and a detection end is used for connecting a controller; the first input end and the second input end are not conducted at the same time;
the input end of the first direct current stabilized power supply 140 is connected with the output end of the power seamless converter 130, and the output end is used for connecting a magnetic suspension system; the magnetic suspension system is used for maintaining the main shaft of the motor to be suspended;
wherein, the controller triggers an alarm and turns on the second input terminal of the power seamless converter 130 according to the fault condition of the ups 120.
Specifically, the power conversion module 110 refers to a module capable of converting a power signal; the power conversion module 110 can be used to convert three-phase ac power into single-phase ac power, for example, 380V ac power can be converted into 220V ac power. The external input power refers to a three-phase alternating current power supply; for example, the external input power may be 380V ac power. The UPS 120 (i.e., UPS) may be used to ensure that the external input power source continues to operate for a period of time after it is powered off. The ups 120 may include an energy storage module and an inverter connected to the energy storage module; for example, when the external input power supply works normally, the external input power supply can charge the energy storage module; when the external input power source is powered off, the energy storage module may generate a power signal to the power seamless converter 130 through the inverter. The power seamless transition 130 refers to a device or module that is capable of seamlessly switching input power; the power seamless transition 130 may be a two-way power seamless transition. The first DC voltage regulator 140 refers to a module capable of providing a stable DC power to a load, and the first DC voltage regulator 140 may be a DC (direct current) to DC (direct current) voltage regulator. The magnetic levitation system can be used to maintain the spindle of the motor in levitation, so that the rotor can be in a stable levitation balance state. The motor can be a permanent magnet synchronous motor or an asynchronous motor. The controller may be, but is not limited to, a PLC (Programmable logic controller).
Further, based on the input end of the power conversion module 110 being connected to an external input power source, the output end of the power conversion module 110 is respectively connected to the input end of the uninterruptible power supply 120 and the second input end of the power seamless converter 130; the first input end of the power seamless converter 130 is connected with the output end of the uninterruptible power supply 120, and the detection end of the power seamless converter 130 is connected with the controller; the input end of the first direct current stabilized power supply 140 is connected with the power supply seamless converter 130, and the output end of the first direct current stabilized power supply 140 is connected with the magnetic suspension system.
After the system is powered on and started, an external input power transmits a three-phase power signal to the power conversion module 110, the three-phase power signal received by the power conversion module 110 is converted, and the converted power signal obtained by the conversion is respectively transmitted to the second input ends of the uninterruptible power supply 120 and the power seamless converter 130, so that the uninterruptible power supply 120 can be charged, and meanwhile, the uninterruptible power supply 120 can transmit an output power signal to the first input end of the power seamless converter 130. The power seamless converter 130 can conduct a power signal transmission channel with a larger voltage value according to the voltage values of the output power signal transmitted by the ups 120 and the converted power signal transmitted by the power conversion module 110. For example, if the voltage value of the output power signal of the ups 120 is greater than the voltage value of the converted power signal transmitted by the power conversion module 110, the power signal transmission channels of the first input end and the output end of the power seamless converter 130 are turned on, so as to supply power to the ups 120; if the voltage value of the output power signal of the ups 120 is smaller than the voltage value of the converted power signal transmitted by the power conversion module 110, the power signal transmission channel between the second input terminal and the output terminal of the power seamless converter 130 is turned on to supply power to the power conversion module.
Further, when the controller detects that the uninterruptible power supply 120 has a fault through the detection end of the seamless power supply converter 130, an alarm is triggered, and a power signal transmission channel between the second input end and the output end of the seamless power supply converter 130 is switched on, so that the fault alarm of the uninterruptible power supply is realized, and the seamless switching of power supply is realized.
In one example, when the ups output voltage is zero, it indicates that the ups is malfunctioning.
In the above embodiment, the controller may generate an alarm according to a fault condition of the uninterruptible power supply, and simultaneously switch and conduct a transmission channel between the transformer and the dc regulated power supply, thereby implementing fault alarm of the power supply and seamless switching of the power supply. Through increasing the seamless converter of power in air-blower power supply circuit system, can in time produce the warning effect when uninterrupted power source breaks down, can seamlessly switch over to the power conversion module power supply simultaneously, strengthened the power supply protection mechanism, improved the power supply reliability.
In one example, the external input power source can output 380V of three-phase alternating current; the power supply conversion module is a conversion module for converting 380V alternating current into 220V alternating current; the output voltage of the uninterrupted power supply is greater than the output voltage of the power supply conversion module; the output voltage of the first DC stabilized power supply is 200V. Specifically, when the uninterruptible power supply and the external input power supply normally work, the power seamless converter conducts a power signal transmission channel between a first input end and an output end of the power seamless converter based on the fact that an output power signal transmitted by the uninterruptible power supply is larger than a voltage value of a converted power signal transmitted by the power conversion module, and power supply of an uninterruptible power supply end is achieved. When the controller detects that the uninterruptible power supply fails through the detection end of the power supply seamless converter, the alarm is triggered, and a power supply signal transmission channel between the second input end and the output end of the power supply seamless converter is switched on, so that the failure alarm of the uninterruptible power supply is realized, and the seamless switching of power supply is realized.
Optionally, when the controller detects that the voltage at the detection end of the power supply seamless converter is zero (that is, the output of the uninterruptible power supply is zero), an alarm is triggered, and thus the fault alarm of the uninterruptible power supply is realized.
In one embodiment, as shown in fig. 2, a power protection system is provided, which includes a power conversion module 210, an uninterruptible power supply 220, a seamless power converter 230, and a first regulated dc power supply 240; the system also includes a second regulated dc power supply 250 connected between the controller and the output of the seamless power converter 230. Wherein, the input end of the power conversion module 210 is connected to an external input power source, and the output end of the power conversion module 210 is respectively connected to the input end of the uninterruptible power supply 220 and the second input end of the power seamless converter 230; the first input end of the power seamless converter 230 is connected with the output end of the uninterruptible power supply 220, and the detection end of the power seamless converter 230 is connected with the controller; the input end of the first DC stabilized power supply 240 is connected with the power supply seamless converter 230, and the output end of the first DC stabilized power supply 240 is connected with the magnetic suspension system.
The second DC regulated power supply 250 may be a DC (direct current) to DC (direct current) regulated power supply.
Specifically, after the system is powered on and started, the power seamless converter 230 may turn on the power signal transmission channel with a larger voltage value according to the voltage values of the output power signal transmitted by the ups 220 and the converted power signal transmitted by the power conversion module 230. For example, if the voltage value of the output power signal of the ups 220 is greater than the voltage value of the converted power signal transmitted by the power conversion module 210, the power signal transmission channels of the first input terminal and the output terminal of the power seamless converter 230 are turned on, and then the first dc voltage regulator 240 may perform voltage stabilization on the received power signal and transmit the processed power signal to the magnetic levitation system, so that the magnetic levitation system maintains the motor spindle in a levitation state, and meanwhile, the second dc voltage regulator 250 may perform voltage stabilization on the received power signal and transmit the processed power signal to the controller, thereby supplying power to the controller.
Further, when the controller detects that the uninterruptible power supply 220 fails through the detection end of the power seamless converter 230, an alarm is triggered, and a power signal transmission channel between the second input end and the output end of the power seamless converter 230 is switched on, so that power can be supplied to the magnetic suspension system through the first direct-current voltage-stabilized power supply 240, and the magnetic suspension system maintains the motor spindle in a suspension state; the normal power supply of the controller is maintained by the second dc stabilized power supply 250.
In one example, the output voltage of the first dc regulated power supply is 200V (volts); the output voltage of the second direct current stabilized power supply is 24V. Specifically, when the uninterruptible power supply and the external input power supply normally work, the output power signal of the power supply seamless converter transmitted based on the uninterruptible power supply is greater than the voltage value of the converted power signal transmitted by the power supply conversion module, a power signal transmission channel between a first input end and an output end of the power supply seamless converter is conducted, and then the first direct-current stabilized power supply can perform voltage stabilization processing on the received power signal, and transmit the processed 200V direct-current power signal to the magnetic suspension system, so that the magnetic suspension system maintains the motor spindle in a suspension state, and meanwhile, the second direct-current stabilized power supply can perform voltage stabilization processing on the received power signal, and transmit the processed 24V direct-current power signal to the controller, thereby realizing the power supply of the controller. When the controller detects that the uninterruptible power supply fails through the detection end of the power supply seamless converter, an alarm is triggered, and a power supply signal transmission channel between the second input end and the output end of the power supply seamless converter is switched on at the same time, so that the failure alarm of the uninterruptible power supply is realized, and meanwhile, the power supply seamless switching of the power supply seamless converter is used for maintaining the power supply of the magnetic suspension system and the controller.
In one example, the second regulated dc power supply can also be used to power a touch screen, wherein the controller is communicatively coupled to the touch screen, and the touch screen can be used to display system operating parameters in real time.
In one embodiment, as shown in FIG. 3, a power protection system is provided that includes a power conversion module 310, an uninterruptible power supply 320, a seamless power converter 330, and a first regulated DC power supply 340. The power seamless converter 330 includes a first power processing module 332 and a second power processing module 334. The input end of the first power supply processing module 332 is connected with the uninterruptible power supply 320, and the output end is connected with the first direct current stabilized voltage power supply 340; the input end of the second power processing module 334 is connected to the power conversion module 310, and the output end is connected to the first dc voltage regulator 340.
The first power processing module 332 may be configured to process an output power signal transmitted by the ups 320, and transmit the processed power signal to the first dc voltage regulator 340. The second power processing module 334 is configured to process the converted power signal transmitted by the power conversion module 310 and transmit the processed power signal to the first dc regulated power supply 334.
Specifically, after the system is powered on and started, the power seamless converter 330 may turn on the power signal transmission channel with a larger voltage value according to the voltage values of the output power signal transmitted by the ups 320 and the converted power signal transmitted by the power conversion module 310. For example, if the voltage value of the output power signal of the ups 320 is greater than the voltage value of the converted power signal transmitted by the power conversion module 310, the power signal transmission channels of the first input end and the output end of the power seamless converter 330 are turned on, that is, the first power processing module 332 receives the output power signal transmitted by the ups 320, processes the output power signal to obtain a processed power signal, and transmits the processed power signal to the magnetic levitation system to maintain the power supply of the magnetic levitation system, so that the magnetic levitation system can maintain the spindle of the motor in the levitation state. For another example, if the voltage value of the output power signal of the ups 320 is smaller than the voltage value of the converted power signal transmitted by the power conversion module 310, the power signal transmission channel between the second input end and the output end of the power seamless converter 330 is turned on, that is, the second power processing module 334 receives the output power signal transmitted by the power conversion module 310, processes the output power signal to obtain a processed power signal, and transmits the processed power signal to the magnetic levitation system to maintain the power supply of the magnetic levitation system, so that the magnetic levitation system can maintain the motor spindle in the levitation state.
Further, when the controller detects that the uninterruptible power supply 320 fails through the detection end of the power seamless converter 330, an alarm is triggered, and a power signal transmission channel between the second input end and the output end of the power seamless converter 330 is switched on, that is, the second power processing module 334 receives an output power signal transmitted by the power conversion module 310, processes the output power signal, transmits the processed power signal to the magnetic levitation system, and maintains the power supply of the magnetic levitation system, so that the magnetic levitation system can maintain the motor spindle in the levitation state, and when the uninterruptible power supply fails, a warning effect can be timely generated, and meanwhile, the controller can seamlessly switch to the external input power supply for supplying power, thereby enhancing the power supply protection mechanism and improving the power supply reliability.
In a specific embodiment, as shown in fig. 3, the power seamless converter 330 further comprises a fault detection circuit 336 connected to the first power handling module 332; the fault detection circuit 336 is connected with the controller; the controller triggers a fault alarm message when it detects a fault in the ups 320 via the fault detection circuit 336.
The fault detection circuit 336 is configured to detect whether the ups 320 is faulty. For example, the fault detection circuit 336 may be a detection circuit that includes a relay that remains on while the ups 320 is operating normally; when the uninterruptible power supply 320 fails, the relay is turned off, and the controller can determine whether the uninterruptible power supply 320 fails by detecting the on-off state of the relay.
In one example, the controller detects that the output voltage of the fault detection circuit 336 is zero, and confirms that the ups 320 is faulty, which in turn triggers an alarm. In addition, since the output power is zero when the ups 320 fails, the power value of the converted power signal output by the power conversion module 310 is greater than the power value of the power signal output by the ups 320, and the power seamless converter 330 seamlessly switches and conducts the power signal transmission channel between the second input terminal and the output terminal, thereby implementing uninterrupted power supply to the magnetic levitation system, and further improving the reliability of system power supply.
In one embodiment, as shown in fig. 3, the first power processing module 332 includes a first rectifying module 352 coupled to the ups 320, and a first filtering module 354 coupled between the first rectifying module 352 and the first dc regulated power supply 340.
The first rectifying module 352 may be configured to convert ac power into dc power; the first rectification module 352 may be, but is not limited to, a single-phase bridge rectification module. The first filtering module 354 can be used to filter the ripple of the rectified output power signal; the first filtering module 354 may be, but is not limited to, an RC filtering circuit.
Specifically, the ups 320 is connected based on the first rectification module 352; the first filtering module 354 is coupled between the first rectifying module 352 and the first regulated dc power supply 340. When a power signal transmission channel between the first input end and the output end of the power seamless converter 330 is turned on, an output power signal of the uninterruptible power supply 320 is sequentially subjected to rectification processing by the first rectification module 352 and filtering processing by the first filtering module 354 and then transmitted to the first dc stabilized power supply 340, and then the first dc stabilized power supply 340 can perform voltage stabilization processing on the received power signal and transmit the processed power signal to the magnetic suspension system, so that continuous power supply to the magnetic suspension system is realized, and the magnetic suspension system can maintain the motor spindle in a suspension state.
In the embodiment, the first rectifying module and the first filtering module are arranged on the first power processing module, so that reliable power signals can be transmitted for the direct-current stabilized power supply, and the reliability of power supply is further improved.
In one embodiment, as shown in FIG. 3, the second power processing module 334 includes a second rectification module 356 coupled to the power conversion module 310, and a second filtering module 358 coupled between the second rectification module 356 and the first regulated DC power supply 340.
The second rectifier module 356 may be configured to convert ac power into dc power; the second rectification module 356 may be, but is not limited to, a single phase bridge rectification module. The second filtering module 358 may be used to filter the ripple of the rectified output power signal; the second filtering module 358 may be, but is not limited to, an RC filtering circuit.
Specifically, the uninterruptible power supply 320 is connected based on the second rectification module 356; the second filtering module 358 is connected between the second rectifying module 356 and the first regulated dc power supply 340. When a power signal transmission channel between the second input end and the output end of the power seamless converter 330 is conducted, the converted power signal output by the power conversion module 310 is transmitted to the first dc stabilized power supply 340 after sequentially passing through the rectification processing of the second rectification module 356 and the filtering processing of the second filtering module 358, and then the first dc stabilized power supply 340 can perform voltage stabilization processing on the received power signal and transmit the processed power signal to the magnetic suspension system, so that continuous power supply to the magnetic suspension system is realized, and further the magnetic suspension system can maintain the motor spindle in a suspension state.
In the above embodiment, the second rectifying module and the second filtering module are arranged on the second power processing module, so that a reliable power signal can be transmitted for the dc stabilized power supply, and the reliability of power supply is further improved.
In one embodiment, as shown in FIG. 4, a power protection system is provided that includes a power conversion module 410, an uninterruptible power supply 420, a seamless power converter 430, and a first regulated DC power supply 440. The ups 420 includes an energy storage module 422 connected between the power conversion module 410 and the power seamless converter 430.
The energy storage module 422 may be, but is not limited to, a battery and a lithium battery.
Specifically, after the system is powered on and started, the external input power may charge the energy storage module 422 in the ups 420 through the power conversion module 410. When the external input power supply is powered off, the energy storage module 422 in the uninterruptible power supply 420 can be used for continuously supplying power to the magnetic suspension system.
In one example, the uninterruptible power supply further includes an inverter coupled to the energy storage module. Specifically, when the external input power supply is powered off, the direct current in the energy storage module is converted into alternating current through the inverter, and the converted alternating current is transmitted to the power supply seamless converter; after the alternating current passes through the seamless power converter and the first direct current stabilized voltage power supply in sequence, the power is supplied to the magnetic suspension system, and a power supply protection mechanism is enhanced.
In a particular embodiment, the power conversion module 410 is a transformer.
The transformer may be a 380V ac to 220V ac converter.
In one embodiment, as shown in fig. 5, there is also provided a magnetic levitation blower including a motor 510, a frequency converter 520 connected between the motor 510 and an external input power source, a magnetic levitation system 530 for maintaining a spindle of the motor 510 levitated, and a power protection system 540 as described in any one of the above.
The motor 510 may be, but is not limited to, a permanent magnet synchronous motor and an asynchronous motor. The frequency converter 520 can be used to change the frequency and amplitude of the power supply, and thus can control the speed of the motor 510.
Specifically, the system is powered on and started, and an external input power supply supplies power to the motor 510 through the frequency converter 520, so that the main shaft of the motor 510 rotates; the external input power source transmits power to the ups 544 and the second input terminal of the power seamless converter 546 through the power conversion module 542, so as to charge the ups 544, and the ups 544 transmits an output power signal to the first input terminal of the power seamless converter 546. The power seamless converter 546 may switch on the power signal transmission channel with a larger voltage value according to the output power signal transmitted by the ups 544 and the voltage value of the converted power signal transmitted by the power conversion module 542. For example, if the voltage value of the output power signal of the ups 544 is greater than the voltage value of the converted power signal transmitted by the power conversion module 542, the power signal transmission channels of the first input end and the output end of the power seamless converter 546 are turned on, so that the ups 544 supplies power to the magnetic levitation system 530, and the magnetic levitation system 530 can maintain the spindle of the motor 510 in a levitation state; if the voltage value of the output power signal of the ups 544 is smaller than the voltage value of the converted power signal transmitted by the power conversion module 542, the power signal transmission channel between the second input end and the output end of the power seamless converter 546 is turned on, so that the power conversion module 542 end supplies power to the magnetic levitation system 530, and the magnetic levitation system 530 can maintain the spindle of the motor 510 in a levitation state.
Further, when the controller detects that the uninterruptible power supply 544 fails, an alarm can be generated, and a transmission channel between the power conversion module 542 and the first dc regulated power supply 548 is switched on at the same time, so that the failure alarm of the power supply is realized, the seamless switching of the power supply is realized at the same time, the power supply protection mechanism of the power supply is enhanced, and the power supply reliability is improved.
It should be noted that, as shown in fig. 1 to 5, the connection line between the motor and the magnetic levitation system represents a mechanical connection relationship. After the system is powered on and started, the magnetic suspension system can maintain the spindle of the motor in a suspension state.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A power protection system, comprising:
the input end of the power supply conversion module is used for connecting an external input power supply;
the input end of the uninterruptible power supply is connected with the output end of the power supply conversion module;
the first input end of the power supply seamless converter is connected with the output end of the uninterruptible power supply, the second input end of the power supply seamless converter is connected with the output end of the power supply conversion module, and the detection end of the power supply seamless converter is connected with the controller; wherein the first input terminal and the second input terminal are not turned on at the same time;
the input end of the first direct current stabilized power supply is connected with the output end of the power supply seamless converter, and the output end of the first direct current stabilized power supply is connected with the magnetic suspension system; the magnetic suspension system is used for maintaining the main shaft of the motor to be suspended;
and the controller triggers an alarm and conducts the second input end of the power supply seamless converter according to the fault condition of the uninterruptible power supply.
2. The power protection system of claim 1, further comprising a second regulated dc power supply connected between the controller and the output of the seamless power converter.
3. The power protection system of claim 1, wherein the power seamless converter comprises a first power processing module and a second power processing module;
the input end of the first power supply processing module is connected with the uninterruptible power supply, and the output end of the first power supply processing module is connected with the first direct-current stabilized power supply; the input end of the second power supply processing module is connected with the power supply conversion module, and the output end of the second power supply processing module is connected with the first direct current stabilized power supply.
4. The power protection system of claim 3, wherein the power seamless converter further comprises a fault detection circuit coupled to the first power processing module; the fault detection circuit is connected with the controller.
5. The power protection system of claim 3, wherein the first power processing module comprises a first rectification module coupled to the uninterruptible power supply, and a first filtering module coupled between the first rectification module and the first regulated dc power supply.
6. The power protection system of claim 3, wherein the second power processing module comprises a second rectification module coupled to the power conversion module, and a second filtering module coupled between the second rectification module and the first regulated dc power supply.
7. The power protection system of claim 1, wherein the uninterruptible power supply includes an energy storage module connected between the power conversion module and the power seamless converter.
8. The power protection system according to any one of claims 1 to 7, wherein the power conversion module is a transformer.
9. A magnetic levitation blower comprising a motor, a frequency converter connected between the motor and an external input power source, a magnetic levitation system for maintaining a spindle of the motor levitated, and a power protection system as claimed in any one of claims 1 to 8.
10. The magnetic levitation blower of claim 9, wherein the motor is a permanent magnet synchronous motor or an asynchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921691014.7U CN210806833U (en) | 2019-10-10 | 2019-10-10 | Power protection system and magnetic suspension air blower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921691014.7U CN210806833U (en) | 2019-10-10 | 2019-10-10 | Power protection system and magnetic suspension air blower |
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| CN210806833U true CN210806833U (en) | 2020-06-19 |
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